/* * mod_openssl - openssl support for lighttpd * * Fully-rewritten from original * Copyright(c) 2016 Glenn Strauss gstrauss()gluelogic.com All rights reserved * License: BSD 3-clause (same as lighttpd) */ /* * Note: If session tickets are -not- disabled with * ssl.openssl.ssl-conf-cmd = ("Options" => "-SessionTicket") * mod_openssl rotates server ticket encryption key (STEK) every 8 hours * and keeps the prior two STEKs around, so ticket lifetime is 24 hours. * This is fine for use with a single lighttpd instance, but with multiple * lighttpd workers, no coordinated STEK (server ticket encryption key) * rotation occurs unless ssl.stek-file is defined and maintained (preferred), * or if some external job restarts lighttpd. Restarting lighttpd generates a * new key that is shared by lighttpd workers for the lifetime of the new key. * If the rotation period expires and lighttpd has not been restarted, and if * ssl.stek-file is not in use, then lighttpd workers will generate new * independent keys, making session tickets less effective for session * resumption, since clients have a lower chance for future connections to * reach the same lighttpd worker. However, things will still work, and a new * session will be created if session resumption fails. Admins should plan to * restart lighttpd at least every 8 hours if session tickets are enabled and * multiple lighttpd workers are configured. Since that is likely disruptive, * if multiple lighttpd workers are configured, ssl.stek-file should be * defined and the file maintained externally. */ #include "first.h" #include #include #include #include #include #include #include #include /*(not needed)*/ /* correction; needed for: * SSL_load_client_CA_file() * X509_STORE_load_locations() */ /*#define OPENSSL_NO_STDIO*/ #ifndef USE_OPENSSL_KERBEROS #ifndef OPENSSL_NO_KRB5 #define OPENSSL_NO_KRB5 #endif #endif #include "sys-crypto.h" #ifdef BORINGSSL_API_VERSION #undef OPENSSL_NO_STDIO /* for X509_STORE_load_locations() */ #endif #ifdef WOLFSSL_OPTIONS_H /* WolfSSL defines OPENSSL_VERSION_NUMBER 0x10001040L for OPENSSL_ALL * or HAVE_LIGHTY. WolfSSL does not provide many interfaces added in * OpenSSL 1.0.2, including SSL_CTX_set_cert_cb(), so it is curious that * WolFSSL defines OPENSSL_VERSION_NUMBER 0x10100000L for WOLFSSL_APACHE_HTTPD*/ #ifndef OPENSSL_EXTRA #define OPENSSL_EXTRA #endif #ifndef OPENSSL_ALL #define OPENSSL_ALL #endif #include #include #endif #include #include #include #include #include #include #include #include #ifndef OPENSSL_NO_DH #include #endif #ifndef OPENSSL_NO_OCSP #include #endif #ifdef BORINGSSL_API_VERSION /* BoringSSL purports to have some OCSP support */ #undef OPENSSL_NO_OCSP #endif #if ! defined OPENSSL_NO_TLSEXT && ! defined SSL_CTRL_SET_TLSEXT_HOSTNAME #define OPENSSL_NO_TLSEXT #endif #if OPENSSL_VERSION_NUMBER >= 0x0090800fL #ifndef OPENSSL_NO_ECDH #include #endif #endif #ifdef WOLFSSL_VERSION #ifdef HAVE_ALPN #undef OPENSSL_NO_TLSEXT #else #define OPENSSL_NO_TLSEXT #endif #ifdef HAVE_SESSION_TICKET #define TLSEXT_TYPE_session_ticket #endif static char global_err_buf[WOLFSSL_MAX_ERROR_SZ]; #undef ERR_error_string #define ERR_error_string(e,b) \ (wolfSSL_ERR_error_string_n((e),global_err_buf,WOLFSSL_MAX_ERROR_SZ), \ global_err_buf) /* WolfSSL does not provide OPENSSL_cleanse() */ #define OPENSSL_cleanse(x,sz) safe_memclear((x),(sz)) #define SSL_set_read_ahead(x,y) ((void)(y)) /*WolfSSL no SSL_set_read_ahead()*/ #if 0 /* symbols and definitions requires WolfSSL built with -DOPENSSL_EXTRA */ #define SSL_TLSEXT_ERR_OK 0 #define SSL_TLSEXT_ERR_ALERT_FATAL alert_fatal #define SSL_TLSEXT_ERR_NOACK alert_warning WOLFSSL_API void wolfSSL_set_verify_depth(WOLFSSL *ssl,int depth); WOLFSSL_API void wolfSSL_X509_NAME_free(WOLFSSL_X509_NAME* name); #define X509_NAME_cmp wolfSSL_X509_NAME_cmp WOLFSSL_API int wolfSSL_X509_NAME_cmp(const WOLFSSL_X509_NAME* x, const WOLFSSL_X509_NAME* y); WOLFSSL_API WOLFSSL_X509_NAME* wolfSSL_X509_NAME_dup(WOLFSSL_X509_NAME*); WOLFSSL_API char* wolfSSL_X509_get_name_oneline(WOLFSSL_X509_NAME*, char*, int); #undef OBJ_sn2nid #define OBJ_sn2nid(sn) wc_OBJ_sn2nid(sn) WOLFSSL_API const char* wolfSSL_OBJ_nid2sn(int n); WOLFSSL_API int wolfSSL_OBJ_obj2nid(const WOLFSSL_ASN1_OBJECT *o); WOLFSSL_API WOLFSSL_ASN1_OBJECT * wolfSSL_X509_NAME_ENTRY_get_object(WOLFSSL_X509_NAME_ENTRY *ne); #define X509_NAME_get_entry wolfSSL_X509_NAME_get_entry WOLFSSL_API WOLFSSL_X509_NAME_ENTRY *wolfSSL_X509_NAME_get_entry(WOLFSSL_X509_NAME *name, int loc); #endif #if 0 /* symbols and definitions requires WolfSSL built with -DOPENSSL_ALL */ WOLFSSL_API WOLF_STACK_OF(WOLFSSL_X509_NAME) *wolfSSL_dup_CA_list( WOLF_STACK_OF(WOLFSSL_X509_NAME) *sk ); /*wolfSSL_sk_X509_NAME_new()*/ /*wolfSSL_sk_X509_NAME_push()*/ #endif #endif /* WOLFSSL_VERSION */ #include "base.h" #include "fdevent.h" #include "http_header.h" #include "http_kv.h" #include "log.h" #include "plugin.h" #include "safe_memclear.h" typedef struct { /* SNI per host: with COMP_SERVER_SOCKET, COMP_HTTP_SCHEME, COMP_HTTP_HOST */ #ifdef WOLFSSL_VERSION buffer *ssl_pemfile_pkey; buffer *ssl_pemfile_x509; buffer **ssl_pemfile_chain; #else EVP_PKEY *ssl_pemfile_pkey; X509 *ssl_pemfile_x509; STACK_OF(X509) *ssl_pemfile_chain; #endif buffer *ssl_stapling; const buffer *ssl_pemfile; const buffer *ssl_privkey; const buffer *ssl_stapling_file; time_t ssl_stapling_loadts; time_t ssl_stapling_nextts; char must_staple; } plugin_cert; typedef struct { SSL_CTX *ssl_ctx; } plugin_ssl_ctx; typedef struct { STACK_OF(X509_NAME) *names; X509_STORE *certs; } plugin_cacerts; typedef struct { SSL_CTX *ssl_ctx; /* output from network_init_ssl() */ /*(used only during startup; not patched)*/ unsigned char ssl_enabled; /* only interesting for setting up listening sockets. don't use at runtime */ unsigned char ssl_honor_cipher_order; /* determine SSL cipher in server-preferred order, not client-order */ unsigned char ssl_empty_fragments; /* whether to not set SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS */ unsigned char ssl_use_sslv2; unsigned char ssl_use_sslv3; const buffer *ssl_cipher_list; const buffer *ssl_dh_file; const buffer *ssl_ec_curve; array *ssl_conf_cmd; /*(copied from plugin_data for socket ssl_ctx config)*/ const plugin_cert *pc; const plugin_cacerts *ssl_ca_file; STACK_OF(X509_NAME) *ssl_ca_dn_file; const buffer *ssl_ca_crl_file; unsigned char ssl_verifyclient; unsigned char ssl_verifyclient_enforce; unsigned char ssl_verifyclient_depth; unsigned char ssl_read_ahead; unsigned char ssl_disable_client_renegotiation; } plugin_config_socket; /*(used at startup during configuration)*/ typedef struct { /* SNI per host: w/ COMP_SERVER_SOCKET, COMP_HTTP_SCHEME, COMP_HTTP_HOST */ plugin_cert *pc; const plugin_cacerts *ssl_ca_file; STACK_OF(X509_NAME) *ssl_ca_dn_file; const buffer *ssl_ca_crl_file; unsigned char ssl_verifyclient; unsigned char ssl_verifyclient_enforce; unsigned char ssl_verifyclient_depth; unsigned char ssl_verifyclient_export_cert; unsigned char ssl_read_ahead; unsigned char ssl_log_noise; unsigned char ssl_disable_client_renegotiation; const buffer *ssl_verifyclient_username; const buffer *ssl_acme_tls_1; } plugin_config; typedef struct { PLUGIN_DATA; plugin_ssl_ctx *ssl_ctxs; plugin_config defaults; server *srv; array *cafiles; const char *ssl_stek_file; } plugin_data; static int ssl_is_init; /* need assigned p->id for deep access of module handler_ctx for connection * i.e. handler_ctx *hctx = con->plugin_ctx[plugin_data_singleton->id]; */ static plugin_data *plugin_data_singleton; #define LOCAL_SEND_BUFSIZE (16 * 1024) static char *local_send_buffer; typedef struct { SSL *ssl; request_st *r; connection *con; short renegotiations; /* count of SSL_CB_HANDSHAKE_START */ short close_notify; unsigned short alpn; plugin_config conf; buffer *tmp_buf; log_error_st *errh; } handler_ctx; static handler_ctx * handler_ctx_init (void) { handler_ctx *hctx = calloc(1, sizeof(*hctx)); force_assert(hctx); return hctx; } static void handler_ctx_free (handler_ctx *hctx) { if (hctx->ssl) SSL_free(hctx->ssl); free(hctx); } #ifdef TLSEXT_TYPE_session_ticket /* ssl/ssl_local.h */ #define TLSEXT_KEYNAME_LENGTH 16 #define TLSEXT_TICK_KEY_LENGTH 32 /* openssl has a huge number of interfaces, but not the most useful; * construct our own session ticket encryption key structure */ typedef struct tlsext_ticket_key_st { time_t active_ts; /* tickets not issued w/ key until activation timestamp */ time_t expire_ts; /* key not valid after expiration timestamp */ unsigned char tick_key_name[TLSEXT_KEYNAME_LENGTH]; unsigned char tick_hmac_key[TLSEXT_TICK_KEY_LENGTH]; unsigned char tick_aes_key[TLSEXT_TICK_KEY_LENGTH]; } tlsext_ticket_key_t; static tlsext_ticket_key_t session_ticket_keys[4]; static time_t stek_rotate_ts; static int mod_openssl_session_ticket_key_generate (time_t active_ts, time_t expire_ts) { /* openssl RAND_*bytes() functions are called multiple times since the * funcs might have a 32-byte limit on number of bytes returned each call * * (Note: session ticket encryption key generation is not expected to fail) * * 3 keys are stored in session_ticket_keys[] * The 4th element of session_ticket_keys[] is used for STEK construction */ /*(RAND_priv_bytes() not in openssl 1.1.0; introduced in openssl 1.1.1)*/ #if OPENSSL_VERSION_NUMBER < 0x10101000L \ || defined(LIBRESSL_VERSION_NUMBER) #define RAND_priv_bytes(x,sz) RAND_bytes((x),(sz)) #endif if (RAND_bytes(session_ticket_keys[3].tick_key_name, TLSEXT_KEYNAME_LENGTH) <= 0 || RAND_priv_bytes(session_ticket_keys[3].tick_hmac_key, TLSEXT_TICK_KEY_LENGTH) <= 0 || RAND_priv_bytes(session_ticket_keys[3].tick_aes_key, TLSEXT_TICK_KEY_LENGTH) <= 0) return 0; session_ticket_keys[3].active_ts = active_ts; session_ticket_keys[3].expire_ts = expire_ts; return 1; } static void mod_openssl_session_ticket_key_rotate (void) { /* discard oldest key (session_ticket_keys[2]) and put newest key first * 3 keys are stored in session_ticket_keys[0], [1], [2] * session_ticket_keys[3] is used to construct and pass new STEK */ session_ticket_keys[2] = session_ticket_keys[1]; session_ticket_keys[1] = session_ticket_keys[0]; /*memmove(session_ticket_keys+1, session_ticket_keys+0, sizeof(tlsext_ticket_key_t)*2);*/ session_ticket_keys[0] = session_ticket_keys[3]; OPENSSL_cleanse(session_ticket_keys+3, sizeof(tlsext_ticket_key_t)); } static tlsext_ticket_key_t * tlsext_ticket_key_get (void) { const time_t cur_ts = log_epoch_secs; const int e = sizeof(session_ticket_keys)/sizeof(*session_ticket_keys) - 1; for (int i = 0; i < e; ++i) { if (session_ticket_keys[i].active_ts > cur_ts) continue; if (session_ticket_keys[i].expire_ts < cur_ts) continue; return &session_ticket_keys[i]; } return NULL; } static tlsext_ticket_key_t * tlsext_ticket_key_find (unsigned char key_name[16], int *refresh) { *refresh = 0; const time_t cur_ts = log_epoch_secs; const int e = sizeof(session_ticket_keys)/sizeof(*session_ticket_keys) - 1; for (int i = 0; i < e; ++i) { if (session_ticket_keys[i].expire_ts < cur_ts) continue; if (0 == memcmp(session_ticket_keys[i].tick_key_name, key_name, 16)) return &session_ticket_keys[i]; if (session_ticket_keys[i].active_ts <= cur_ts) *refresh = 1; /* newer active key is available */ } return NULL; } static void tlsext_ticket_wipe_expired (const time_t cur_ts) { const int e = sizeof(session_ticket_keys)/sizeof(*session_ticket_keys) - 1; for (int i = 0; i < e; ++i) { if (session_ticket_keys[i].expire_ts != 0 && session_ticket_keys[i].expire_ts < cur_ts) OPENSSL_cleanse(session_ticket_keys+i, sizeof(tlsext_ticket_key_t)); } } /* based on reference implementation from openssl 1.1.1g man page * man SSL_CTX_set_tlsext_ticket_key_cb * but openssl code uses EVP_aes_256_cbc() instead of EVP_aes_128_cbc() */ static int ssl_tlsext_ticket_key_cb (SSL *s, unsigned char key_name[16], unsigned char iv[EVP_MAX_IV_LENGTH], EVP_CIPHER_CTX *ctx, HMAC_CTX *hctx, int enc) { UNUSED(s); if (enc) { /* create new session */ tlsext_ticket_key_t *k = tlsext_ticket_key_get(); if (NULL == k) return 0; /* current key does not exist or is not valid */ memcpy(key_name, k->tick_key_name, 16); if (RAND_bytes(iv, EVP_MAX_IV_LENGTH) <= 0) return -1; /* insufficient random */ EVP_EncryptInit_ex(ctx, EVP_aes_256_cbc(), NULL, k->tick_aes_key, iv); HMAC_Init_ex(hctx, k->tick_hmac_key, sizeof(k->tick_hmac_key), EVP_sha256(), NULL); return 1; } else { /* retrieve session */ int refresh; tlsext_ticket_key_t *k = tlsext_ticket_key_find(key_name, &refresh); if (NULL == k) return 0; HMAC_Init_ex(hctx, k->tick_hmac_key, sizeof(k->tick_hmac_key), EVP_sha256(), NULL); EVP_DecryptInit_ex(ctx, EVP_aes_256_cbc(), NULL, k->tick_aes_key, iv); return refresh ? 2 : 1; /* 'refresh' will trigger issuing new ticket for session * even though the current ticket is still valid */ } } static int mod_openssl_session_ticket_key_file (const char *fn) { /* session ticket encryption key (STEK) * * STEK file should be stored in non-persistent storage, * e.g. /dev/shm/lighttpd/stek-file (in memory) * with appropriate permissions set to keep stek-file from being * read by other users. Where possible, systems should also be * configured without swap. * * admin should schedule an independent job to periodically * generate new STEK up to 3 times during key lifetime * (lighttpd stores up to 3 keys) * * format of binary file is: * 4-byte - format version (always 0; for use if format changes) * 4-byte - activation timestamp * 4-byte - expiration timestamp * 16-byte - session ticket key name * 32-byte - session ticket HMAC encrpytion key * 32-byte - session ticket AES encrpytion key * * STEK file can be created with a command such as: * dd if=/dev/random bs=1 count=80 status=none | \ * perl -e 'print pack("iii",0,time()+300,time()+86400),<>' \ * > STEK-file.$$ && mv STEK-file.$$ STEK-file * * The above delays activation time by 5 mins (+300 sec) to allow file to * be propagated to other machines. (admin must handle this independently) * If STEK generation is performed immediately prior to starting lighttpd, * admin should activate keys immediately (without +300). */ int buf[23]; /* 92 bytes */ int fd = fdevent_open_cloexec(fn, 1, O_RDONLY, 0); if (fd < 0) return 0; ssize_t rd = read(fd, buf, sizeof(buf)); close(fd); int rc = 0; /*(will retry on next check interval upon any error)*/ if (rd == sizeof(buf) && buf[0] == 0) { /*(format version 0)*/ session_ticket_keys[3].active_ts = buf[1]; session_ticket_keys[3].expire_ts = buf[2]; #ifndef __COVERITY__ /* intentional; hide from Coverity Scan */ /* intentionally copy 80 bytes into consecutive arrays * tick_key_name[], tick_hmac_key[], tick_aes_key[] */ memcpy(&session_ticket_keys[3].tick_key_name, buf+3, 80); #endif rc = 1; } OPENSSL_cleanse(buf, sizeof(buf)); return rc; } static void mod_openssl_session_ticket_key_check (const plugin_data *p, const time_t cur_ts) { int rotate = 0; if (p->ssl_stek_file) { struct stat st; if (0 == stat(p->ssl_stek_file, &st) && st.st_mtime > stek_rotate_ts) rotate = mod_openssl_session_ticket_key_file(p->ssl_stek_file); tlsext_ticket_wipe_expired(cur_ts); } else if (cur_ts - 28800 >= stek_rotate_ts) /*(8 hours)*/ rotate = mod_openssl_session_ticket_key_generate(cur_ts, cur_ts+86400); if (rotate) { mod_openssl_session_ticket_key_rotate(); stek_rotate_ts = cur_ts; } } #endif /* TLSEXT_TYPE_session_ticket */ #ifndef OPENSSL_NO_OCSP #ifndef BORINGSSL_API_VERSION /* BoringSSL suggests using different API */ static int ssl_tlsext_status_cb(SSL *ssl, void *arg) { #ifdef SSL_get_tlsext_status_type if (TLSEXT_STATUSTYPE_ocsp != SSL_get_tlsext_status_type(ssl)) return SSL_TLSEXT_ERR_NOACK; /* ignore if not client OCSP request */ #endif handler_ctx *hctx = (handler_ctx *) SSL_get_app_data(ssl); buffer *ssl_stapling = hctx->conf.pc->ssl_stapling; if (NULL == ssl_stapling) return SSL_TLSEXT_ERR_NOACK; UNUSED(arg); int len = (int)buffer_string_length(ssl_stapling); #ifdef WOLFSSL_VERSION /* WolfSSL does not require copy */ uint8_t *ocsp_resp = (uint8_t *)ssl_stapling->ptr; #else /* OpenSSL and LibreSSL require copy (BoringSSL, too, if using compat API)*/ uint8_t *ocsp_resp = OPENSSL_malloc(len); if (NULL == ocsp_resp) return SSL_TLSEXT_ERR_NOACK; /* ignore OCSP request if error occurs */ memcpy(ocsp_resp, ssl_stapling->ptr, len); #endif if (!SSL_set_tlsext_status_ocsp_resp(ssl, ocsp_resp, len)) { log_error(hctx->r->conf.errh, __FILE__, __LINE__, "SSL: failed to set OCSP response for TLS server name %s: %s", hctx->r->uri.authority.ptr, ERR_error_string(ERR_get_error(), NULL)); #ifndef WOLFSSL_VERSION /* WolfSSL does not require copy */ OPENSSL_free(ocsp_resp); #endif return SSL_TLSEXT_ERR_NOACK; /* ignore OCSP request if error occurs */ /*return SSL_TLSEXT_ERR_ALERT_FATAL;*/ } return SSL_TLSEXT_ERR_OK; } #endif #endif INIT_FUNC(mod_openssl_init) { plugin_data_singleton = (plugin_data *)calloc(1, sizeof(plugin_data)); #ifdef DEBUG_WOLFSSL wolfSSL_Debugging_ON(); #endif return plugin_data_singleton; } static int mod_openssl_init_once_openssl (server *srv) { if (ssl_is_init) return 1; #if OPENSSL_VERSION_NUMBER >= 0x10100000L \ && !defined(LIBRESSL_VERSION_NUMBER) \ && !defined(WOLFSSL_VERSION) OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS |OPENSSL_INIT_LOAD_CRYPTO_STRINGS,NULL); OPENSSL_init_crypto(OPENSSL_INIT_ADD_ALL_CIPHERS |OPENSSL_INIT_ADD_ALL_DIGESTS |OPENSSL_INIT_LOAD_CONFIG, NULL); #elif defined(WOLFSSL_VERSION) if (wolfSSL_Init() != WOLFSSL_SUCCESS) { log_error(srv->errh, __FILE__, __LINE__, "SSL: wolfSSL_Init() failed"); return 0; } #else SSL_load_error_strings(); SSL_library_init(); OpenSSL_add_all_algorithms(); #endif ssl_is_init = 1; if (0 == RAND_status()) { log_error(srv->errh, __FILE__, __LINE__, "SSL: not enough entropy in the pool"); return 0; } local_send_buffer = malloc(LOCAL_SEND_BUFSIZE); force_assert(NULL != local_send_buffer); return 1; } static void mod_openssl_free_openssl (void) { if (!ssl_is_init) return; #ifdef TLSEXT_TYPE_session_ticket OPENSSL_cleanse(session_ticket_keys, sizeof(session_ticket_keys)); stek_rotate_ts = 0; #endif #if OPENSSL_VERSION_NUMBER >= 0x10100000L \ && !defined(LIBRESSL_VERSION_NUMBER) \ && !defined(WOLFSSL_VERSION) /*(OpenSSL libraries handle thread init and deinit) * https://github.com/openssl/openssl/pull/1048 */ #elif defined(WOLFSSL_VERSION) if (wolfSSL_Cleanup() != WOLFSSL_SUCCESS) { log_error(plugin_data_singleton->srv->errh, __FILE__, __LINE__, "SSL: wolfSSL_Cleanup() failed"); } #else CRYPTO_cleanup_all_ex_data(); ERR_free_strings(); #if OPENSSL_VERSION_NUMBER >= 0x10000000L ERR_remove_thread_state(NULL); #else ERR_remove_state(0); #endif EVP_cleanup(); #endif free(local_send_buffer); ssl_is_init = 0; } #ifdef WOLFSSL_VERSION static void mod_wolfssl_free_der_certs (buffer **certs) { if (NULL == certs) return; for (int i = 0; NULL != certs[i]; ++i) buffer_free(certs[i]); free(certs); } #endif static void mod_openssl_free_config (server *srv, plugin_data * const p) { array_free(p->cafiles); if (NULL != p->ssl_ctxs) { SSL_CTX * const ssl_ctx_global_scope = p->ssl_ctxs->ssl_ctx; /* free ssl_ctx from $SERVER["socket"] (if not copy of global scope) */ for (uint32_t i = 1; i < srv->config_context->used; ++i) { plugin_ssl_ctx * const s = p->ssl_ctxs + i; if (s->ssl_ctx && s->ssl_ctx != ssl_ctx_global_scope) SSL_CTX_free(s->ssl_ctx); } /* free ssl_ctx from global scope */ if (ssl_ctx_global_scope) SSL_CTX_free(ssl_ctx_global_scope); free(p->ssl_ctxs); } if (NULL == p->cvlist) return; /* (init i to 0 if global context; to 1 to skip empty global context) */ for (int i = !p->cvlist[0].v.u2[1], used = p->nconfig; i < used; ++i) { config_plugin_value_t *cpv = p->cvlist + p->cvlist[i].v.u2[0]; for (; -1 != cpv->k_id; ++cpv) { switch (cpv->k_id) { case 0: /* ssl.pemfile */ if (cpv->vtype == T_CONFIG_LOCAL) { plugin_cert *pc = cpv->v.v; #ifdef WOLFSSL_VERSION buffer_free(pc->ssl_pemfile_pkey); /*buffer_free(pc->ssl_pemfile_x509);*//*(part of chain)*/ mod_wolfssl_free_der_certs(pc->ssl_pemfile_chain); #else EVP_PKEY_free(pc->ssl_pemfile_pkey); X509_free(pc->ssl_pemfile_x509); sk_X509_pop_free(pc->ssl_pemfile_chain, X509_free); #endif buffer_free(pc->ssl_stapling); } break; case 2: /* ssl.ca-file */ if (cpv->vtype == T_CONFIG_LOCAL) { plugin_cacerts *cacerts = cpv->v.v; sk_X509_NAME_pop_free(cacerts->names, X509_NAME_free); X509_STORE_free(cacerts->certs); free(cacerts); } break; case 3: /* ssl.ca-dn-file */ if (cpv->vtype == T_CONFIG_LOCAL) sk_X509_NAME_pop_free(cpv->v.v, X509_NAME_free); break; default: break; } } } } #ifdef WOLFSSL_VERSION /* WolfSSL OpenSSL compat API does not wipe temp mem used; write our own */ /* (pemfile might contain private key)*/ /* code here is based on similar code in mod_nss */ #include "base64.h" #define PEM_BEGIN "-----BEGIN " #define PEM_END "-----END " #define PEM_BEGIN_CERT "-----BEGIN CERTIFICATE-----" #define PEM_END_CERT "-----END CERTIFICATE-----" #define PEM_BEGIN_TRUSTED_CERT "-----BEGIN TRUSTED CERTIFICATE-----" #define PEM_END_TRUSTED_CERT "-----END TRUSTED CERTIFICATE-----" #define PEM_BEGIN_PKEY "-----BEGIN PRIVATE KEY-----" #define PEM_END_PKEY "-----END PRIVATE KEY-----" #define PEM_BEGIN_EC_PKEY "-----BEGIN EC PRIVATE KEY-----" #define PEM_END_EC_PKEY "-----END EC PRIVATE KEY-----" #define PEM_BEGIN_RSA_PKEY "-----BEGIN RSA PRIVATE KEY-----" #define PEM_END_RSA_PKEY "-----END RSA PRIVATE KEY-----" #define PEM_BEGIN_DSA_PKEY "-----BEGIN DSA PRIVATE KEY-----" #define PEM_END_DSA_PKEY "-----END DSA PRIVATE KEY-----" #define PEM_BEGIN_ANY_PKEY "-----BEGIN ANY PRIVATE KEY-----" #define PEM_END_ANY_PKEY "-----END ANY PRIVATE KEY-----" /* (not implemented: support to get password from user for encrypted key) */ #define PEM_BEGIN_ENCRYPTED_PKEY "-----BEGIN ENCRYPTED PRIVATE KEY-----" #define PEM_END_ENCRYPTED_PKEY "-----END ENCRYPTED PRIVATE KEY-----" #define PEM_BEGIN_X509_CRL "-----BEGIN X509 CRL-----" #define PEM_END_X509_CRL "-----END X509 CRL-----" static buffer * mod_wolfssl_load_pem_file (const char *fn, log_error_st *errh, buffer ***chain) { off_t dlen = 512*1024*1024;/*(arbitrary limit: 512 MB file; expect < 1 MB)*/ char *data = fdevent_load_file(fn, &dlen, errh, malloc, free); if (NULL == data) return NULL; buffer **certs = NULL; int rc = -1; do { int count = 0; char *b = data; for (; (b = strstr(b, PEM_BEGIN_CERT)); b += sizeof(PEM_BEGIN_CERT)-1) ++count; b = data; for (; (b = strstr(b, PEM_BEGIN_TRUSTED_CERT)); b += sizeof(PEM_BEGIN_TRUSTED_CERT)-1) ++count; if (0 == count) { rc = 0; break; } certs = malloc((count+1) * sizeof(buffer *)); force_assert(NULL != certs); certs[count] = NULL; for (int i = 0; i < count; ++i) certs[i] = buffer_init(); buffer *der; int i = 0; for (char *e = data; (b = strstr(e, PEM_BEGIN_CERT)); ++i) { b += sizeof(PEM_BEGIN_CERT)-1; if (*b == '\r') ++b; if (*b == '\n') ++b; e = strstr(b, PEM_END_CERT); if (NULL == e) break; uint32_t len = (uint32_t)(e - b); e += sizeof(PEM_END_CERT)-1; if (i >= count) break; /*(should not happen)*/ der = certs[i]; if (NULL == buffer_append_base64_decode(der,b,len,BASE64_STANDARD)) break; } for (char *e = data; (b = strstr(e, PEM_BEGIN_TRUSTED_CERT)); ++i) { b += sizeof(PEM_BEGIN_TRUSTED_CERT)-1; if (*b == '\r') ++b; if (*b == '\n') ++b; e = strstr(b, PEM_END_TRUSTED_CERT); if (NULL == e) break; uint32_t len = (uint32_t)(e - b); e += sizeof(PEM_END_TRUSTED_CERT)-1; if (i >= count) break; /*(should not happen)*/ der = certs[i]; if (NULL == buffer_append_base64_decode(der,b,len,BASE64_STANDARD)) break; } if (i == count) rc = 0; else errno = EIO; } while (0); if (dlen) safe_memclear(data, dlen); free(data); if (rc < 0) { log_perror(errh, __FILE__, __LINE__, "error loading %s", fn); mod_wolfssl_free_der_certs(certs); certs = NULL; } *chain = certs; return certs ? certs[0] : NULL; } static buffer * mod_wolfssl_evp_pkey_load_pem_file (const char *fn, log_error_st *errh) { off_t dlen = 512*1024*1024;/*(arbitrary limit: 512 MB file; expect < 1 MB)*/ char *data = fdevent_load_file(fn, &dlen, errh, malloc, free); if (NULL == data) return NULL; buffer *pkey = NULL; int rc = -1; do { /*(expecting single private key in file, so first match)*/ char *b, *e; if ((b = strstr(data, PEM_BEGIN_PKEY)) && (e = strstr(b, PEM_END_PKEY))) b += sizeof(PEM_BEGIN_PKEY)-1; else if ((b = strstr(data, PEM_BEGIN_EC_PKEY)) && (e = strstr(b, PEM_END_EC_PKEY))) b += sizeof(PEM_BEGIN_EC_PKEY)-1; else if ((b = strstr(data, PEM_BEGIN_RSA_PKEY)) && (e = strstr(b, PEM_END_RSA_PKEY))) b += sizeof(PEM_BEGIN_RSA_PKEY)-1; else if ((b = strstr(data, PEM_BEGIN_DSA_PKEY)) && (e = strstr(b, PEM_END_DSA_PKEY))) b += sizeof(PEM_BEGIN_DSA_PKEY)-1; else if ((b = strstr(data, PEM_BEGIN_ANY_PKEY)) && (e = strstr(b, PEM_END_ANY_PKEY))) b += sizeof(PEM_BEGIN_ANY_PKEY)-1; else break; if (*b == '\r') ++b; if (*b == '\n') ++b; pkey = buffer_init(); size_t len = (size_t)(e - b); if (NULL == buffer_append_base64_decode(pkey, b, len, BASE64_STANDARD)) break; rc = 0; } while (0); if (dlen) safe_memclear(data, dlen); free(data); if (rc < 0) { log_error(errh, __FILE__, __LINE__, "%s() %s", __func__, fn); return NULL; } return pkey; } static int mod_wolfssl_CTX_use_certificate_chain_file (WOLFSSL_CTX *ssl_ctx, const char *fn, log_error_st *errh) { /* (While it should be possible to parse DERs from (buffer **) * s->pc->ssl_pemfile_chain, it is simpler to re-read file and use the * built-in wolfSSL_CTX_use_certificate_chain_buffer() interface) */ off_t dlen = 4*1024*1024;/*(arbitrary limit: 4 MB file; expect < 1 KB)*/ char *data = fdevent_load_file(fn, &dlen, errh, malloc, free); if (NULL == data) return -1; int rc = wolfSSL_CTX_use_certificate_chain_buffer(ssl_ctx, (unsigned char *)data, (long)dlen); if (dlen) safe_memclear(data, dlen); free(data); if (rc == WOLFSSL_SUCCESS) return 1; log_error(errh, __FILE__, __LINE__, "SSL: %s %s", ERR_error_string(rc, NULL), fn); return 0; } static STACK_OF(X509_NAME) * mod_wolfssl_load_client_CA_file (const buffer *ssl_ca_file, log_error_st *errh) { /* similar to wolfSSL_load_client_CA_file(), plus some processing */ buffer **certs = NULL; if (NULL == mod_wolfssl_load_pem_file(ssl_ca_file->ptr, errh, &certs)) { #ifdef __clang_analyzer__ mod_wolfssl_free_der_certs(certs); /*unnecessary; quiet clang analyzer*/ #endif return NULL; } WOLF_STACK_OF(WOLFSSL_X509_NAME) *canames = wolfSSL_sk_X509_NAME_new(NULL); if (NULL == canames) { mod_wolfssl_free_der_certs(certs); return NULL; } for (int i = 0; NULL != certs[i]; ++i) { WOLFSSL_X509 *ca = wolfSSL_X509_load_certificate_buffer((unsigned char *)certs[i]->ptr, (int) buffer_string_length(certs[i]), WOLFSSL_FILETYPE_ASN1); WOLFSSL_X509_NAME *subj = NULL; if (NULL == ca || NULL == (subj = wolfSSL_X509_get_subject_name(ca)) || 0 != wolfSSL_sk_X509_NAME_push(canames, wolfSSL_X509_NAME_dup(subj))) { log_error(errh, __FILE__, __LINE__, "SSL: couldn't read X509 certificates from '%s'", ssl_ca_file->ptr); if (subj) wolfSSL_X509_NAME_free(subj); if (ca) wolfSSL_X509_free(ca); wolfSSL_sk_X509_NAME_free(canames); mod_wolfssl_free_der_certs(certs); return NULL; } wolfSSL_X509_free(ca); } mod_wolfssl_free_der_certs(certs); return canames; } static plugin_cacerts * mod_wolfssl_load_cacerts (const buffer *ssl_ca_file, log_error_st *errh) { /* similar to mod_wolfSSL_load_client_CA_file(), plus some processing */ /* similar to wolfSSL_load_client_CA_file(), plus some processing */ buffer **certs = NULL; if (NULL == mod_wolfssl_load_pem_file(ssl_ca_file->ptr, errh, &certs)) { #ifdef __clang_analyzer__ mod_wolfssl_free_der_certs(certs); /*unnecessary; quiet clang analyzer*/ #endif return NULL; } WOLFSSL_X509_STORE *castore = wolfSSL_X509_STORE_new(); if (NULL == castore) { mod_wolfssl_free_der_certs(certs); return NULL; } WOLF_STACK_OF(WOLFSSL_X509_NAME) *canames = wolfSSL_sk_X509_NAME_new(NULL); if (NULL == canames) { wolfSSL_X509_STORE_free(castore); mod_wolfssl_free_der_certs(certs); return NULL; } for (int i = 0; NULL != certs[i]; ++i) { WOLFSSL_X509 *ca = wolfSSL_X509_load_certificate_buffer((unsigned char *)certs[i]->ptr, (int) buffer_string_length(certs[i]), WOLFSSL_FILETYPE_ASN1); WOLFSSL_X509_NAME *subj = NULL; if (NULL == ca || !wolfSSL_X509_STORE_add_cert(castore, ca) || NULL == (subj = wolfSSL_X509_get_subject_name(ca)) || 0 != wolfSSL_sk_X509_NAME_push(canames, wolfSSL_X509_NAME_dup(subj))) { log_error(errh, __FILE__, __LINE__, "SSL: couldn't read X509 certificates from '%s'", ssl_ca_file->ptr); if (subj) wolfSSL_X509_NAME_free(subj); if (ca) wolfSSL_X509_free(ca); wolfSSL_sk_X509_NAME_free(canames); wolfSSL_X509_STORE_free(castore); mod_wolfssl_free_der_certs(certs); return NULL; } wolfSSL_X509_free(ca); } mod_wolfssl_free_der_certs(certs); plugin_cacerts *cacerts = malloc(sizeof(plugin_cacerts)); force_assert(cacerts); cacerts->names = canames; cacerts->certs = castore; return cacerts; } static int mod_wolfssl_load_cacrls (WOLFSSL_CTX *ssl_ctx, const buffer *ssl_ca_crl_file, server *srv) { #ifdef HAVE_CRL /* */ int rc = wolfSSL_CTX_EnableCRL(ssl_ctx, WOLFSSL_CRL_CHECK | WOLFSSL_CRL_CHECKALL); if (rc != WOLFSSL_SUCCESS) return 0; const char *fn = ssl_ca_crl_file->ptr; off_t dlen = 512*1024*1024;/*(arbitrary limit: 512 MB file; expect < 1 MB)*/ char *data = fdevent_load_file(fn, &dlen, srv->errh, malloc, free); if (NULL == data) return 0; rc = wolfSSL_CTX_LoadCRLBuffer(ssl_ctx, (byte *)data, (long)dlen, WOLFSSL_FILETYPE_PEM); if (dlen) safe_memclear(data, dlen); free(data); if (rc == WOLFSSL_SUCCESS) return 1; log_error(srv->errh, __FILE__, __LINE__, "SSL: %s %s", ERR_error_string(rc, NULL), fn); return 0; #else UNUSED(ssl_ctx); log_error(srv->errh, __FILE__, __LINE__, "WolfSSL not built with CRL support; ignoring %s", ssl_ca_crl_file->ptr); return WOLFSSL_FAILURE; #endif } static int mod_wolfssl_load_verify_locn (SSL_CTX *ssl_ctx, const buffer *b, server *srv) { const char *fn = b->ptr; off_t dlen = 512*1024*1024;/*(arbitrary limit: 512 MB file; expect < 1 MB)*/ char *data = fdevent_load_file(fn, &dlen, srv->errh, malloc, free); if (NULL == data) return 0; int rc = wolfSSL_CTX_load_verify_buffer(ssl_ctx, (unsigned char *)data, (long)dlen, WOLFSSL_FILETYPE_PEM); if (dlen) safe_memclear(data, dlen); free(data); if (rc == WOLFSSL_SUCCESS) return 1; log_error(srv->errh, __FILE__, __LINE__, "SSL: %s %s", ERR_error_string(rc, NULL), fn); return 0; } static int mod_wolfssl_load_ca_files (SSL_CTX *ssl_ctx, plugin_data *p, server *srv) { /* load all ssl.ca-files specified in the config into each SSL_CTX */ for (uint32_t i = 0, used = p->cafiles->used; i < used; ++i) { const buffer *b = &((data_string *)p->cafiles->data[i])->value; if (!mod_wolfssl_load_verify_locn(ssl_ctx, b, srv)) return 0; } return 1; } #else /* !defined(WOLFSSL_VERSION) */ /* use memory from openssl secure heap for temporary buffers, returned storage * (pemfile might contain a private key in addition to certificate chain) * Interfaces similar to those constructed in include/openssl/pem.h for * PEM_read_bio_X509(), except this is named PEM_read_bio_X509_secmem(). * Similar for PEM_read_bio_X509_AUX_secmem(). * * Supporting routine PEM_ASN1_read_bio_secmem() modified from openssl * crypto/pem/pem_oth.c:PEM_ASN1_read_bio(): * uses PEM_bytes_read_bio_secmem() instead of PEM_bytes_read_bio() * uses OPENSSL_secure_clear_free() instead of OPENSSL_free() * * 'man PEM_bytes_read_bio_secmem()' and see NOTES section for more info * PEM_bytes_read_bio_secmem() openssl 1.1.1 or later * OPENSSL_secure_clear_free() openssl 1.1.0g or later * As this comment is being written, only openssl 1.1.1 is actively maintained. * Earlier vers of openssl no longer receive security patches from openssl.org. */ static void * PEM_ASN1_read_bio_secmem(d2i_of_void *d2i, const char *name, BIO *bp, void **x, pem_password_cb *cb, void *u) { const unsigned char *p = NULL; unsigned char *data = NULL; long len = 0; char *ret = NULL; #if OPENSSL_VERSION_NUMBER >= 0x10101000L \ && !defined(LIBRESSL_VERSION_NUMBER) if (!PEM_bytes_read_bio_secmem(&data, &len, NULL, name, bp, cb, u)) #else if (!PEM_bytes_read_bio(&data, &len, NULL, name, bp, cb, u)) #endif return NULL; p = data; ret = d2i(x, &p, len); #ifndef BORINGSSL_API_VERSION /* missing PEMerr() macro */ if (ret == NULL) PEMerr(PEM_F_PEM_ASN1_READ_BIO, ERR_R_ASN1_LIB); #endif #if OPENSSL_VERSION_NUMBER >= 0x10101000L \ && !defined(LIBRESSL_VERSION_NUMBER) OPENSSL_secure_clear_free(data, len); #else OPENSSL_cleanse(data, len); OPENSSL_free(data); #endif return ret; } static X509 * PEM_read_bio_X509_secmem(BIO *bp, X509 **x, pem_password_cb *cb, void *u) { #ifdef WOLFSSL_VERSION /* WolfSSL limitation; does not wipe temp mem used */ return wolfSSL_PEM_read_bio_X509(bp, x, cb, u); #else return PEM_ASN1_read_bio_secmem((d2i_of_void *)d2i_X509, PEM_STRING_X509, bp, (void **)x, cb, u); #endif } static X509 * PEM_read_bio_X509_AUX_secmem(BIO *bp, X509 **x, pem_password_cb *cb, void *u) { #ifdef WOLFSSL_VERSION /* WolfSSL limitation; does not wipe temp mem used */ return wolfSSL_PEM_read_bio_X509_AUX(bp, x, cb, u); #else return PEM_ASN1_read_bio_secmem((d2i_of_void *)d2i_X509_AUX, PEM_STRING_X509_TRUSTED, bp, (void **)x, cb, u); #endif } static int mod_openssl_load_X509_sk (const char *file, log_error_st *errh, STACK_OF(X509) **chain, BIO *in) { STACK_OF(X509) *chain_sk = NULL; for (X509 *ca; (ca = PEM_read_bio_X509_secmem(in,NULL,NULL,NULL)); ) { if (NULL == chain_sk) /*(allocate only if it will not be empty)*/ chain_sk = sk_X509_new_null(); if (!chain_sk || !sk_X509_push(chain_sk, ca)) { log_error(errh, __FILE__, __LINE__, "SSL: couldn't read X509 certificates from '%s'", file); if (chain_sk) sk_X509_pop_free(chain_sk, X509_free); X509_free(ca); return 0; } } *chain = chain_sk; return 1; } static int mod_openssl_load_X509_STORE (const char *file, log_error_st *errh, X509_STORE **chain, BIO *in) { X509_STORE *chain_store = NULL; for (X509 *ca; (ca = PEM_read_bio_X509(in,NULL,NULL,NULL)); X509_free(ca)) { if (NULL == chain_store) /*(allocate only if it will not be empty)*/ chain_store = X509_STORE_new(); if (!chain_store || !X509_STORE_add_cert(chain_store, ca)) { log_error(errh, __FILE__, __LINE__, "SSL: couldn't read X509 certificates from '%s'", file); if (chain_store) X509_STORE_free(chain_store); X509_free(ca); return 0; } } *chain = chain_store; return 1; } static plugin_cacerts * mod_openssl_load_cacerts (const buffer *ssl_ca_file, log_error_st *errh) { const char *file = ssl_ca_file->ptr; BIO *in = BIO_new(BIO_s_file()); if (NULL == in) { log_error(errh, __FILE__, __LINE__, "SSL: BIO_new(BIO_s_file()) failed"); return NULL; } if (BIO_read_filename(in, file) <= 0) { log_error(errh, __FILE__, __LINE__, "SSL: BIO_read_filename('%s') failed", file); BIO_free(in); return NULL; } X509_STORE *chain_store = NULL; if (!mod_openssl_load_X509_STORE(file, errh, &chain_store, in)) { BIO_free(in); return NULL; } BIO_free(in); if (NULL == chain_store) { log_error(errh, __FILE__, __LINE__, "SSL: ssl.ca-file is empty %s", file); return NULL; } plugin_cacerts *cacerts = malloc(sizeof(plugin_cacerts)); force_assert(cacerts); /* (would be more efficient to walk the X509_STORE and build the list, * but this works for now and matches how ssl.ca-dn-file is handled) */ cacerts->names = SSL_load_client_CA_file(file); if (NULL == cacerts->names) { X509_STORE_free(chain_store); free(cacerts); return NULL; } cacerts->certs = chain_store; return cacerts; } static int mod_openssl_load_cacrls (X509_STORE *store, const buffer *ssl_ca_crl_file, server *srv) { if (1 != X509_STORE_load_locations(store, ssl_ca_crl_file->ptr, NULL)) { log_error(srv->errh, __FILE__, __LINE__, "SSL: %s %s", ERR_error_string(ERR_get_error(), NULL), ssl_ca_crl_file->ptr); return 0; } X509_STORE_set_flags(store, X509_V_FLAG_CRL_CHECK | X509_V_FLAG_CRL_CHECK_ALL); return 1; } #if OPENSSL_VERSION_NUMBER < 0x10002000 \ || defined(LIBRESSL_VERSION_NUMBER) static int mod_openssl_load_verify_locn (SSL_CTX *ssl_ctx, const buffer *b, server *srv) { const char *fn = b->ptr; if (1 == SSL_CTX_load_verify_locations(ssl_ctx, fn, NULL)) return 1; log_error(srv->errh, __FILE__, __LINE__, "SSL: %s %s", ERR_error_string(ERR_get_error(), NULL), fn); return 0; } static int mod_openssl_load_ca_files (SSL_CTX *ssl_ctx, plugin_data *p, server *srv) { /* load all ssl.ca-files specified in the config into each SSL_CTX */ for (uint32_t i = 0, used = p->cafiles->used; i < used; ++i) { const buffer *b = &((data_string *)p->cafiles->data[i])->value; if (!mod_openssl_load_verify_locn(ssl_ctx, b, srv)) return 0; } return 1; } #endif #endif /* !defined(WOLFSSL_VERSION) */ FREE_FUNC(mod_openssl_free) { plugin_data *p = p_d; if (NULL == p->srv) return; mod_openssl_free_config(p->srv, p); mod_openssl_free_openssl(); } static void mod_openssl_merge_config_cpv (plugin_config * const pconf, const config_plugin_value_t * const cpv) { switch (cpv->k_id) { /* index into static config_plugin_keys_t cpk[] */ case 0: /* ssl.pemfile */ if (cpv->vtype == T_CONFIG_LOCAL) pconf->pc = cpv->v.v; break; case 1: /* ssl.privkey */ break; case 2: /* ssl.ca-file */ if (cpv->vtype == T_CONFIG_LOCAL) pconf->ssl_ca_file = cpv->v.v; break; case 3: /* ssl.ca-dn-file */ if (cpv->vtype == T_CONFIG_LOCAL) pconf->ssl_ca_dn_file = cpv->v.v; break; case 4: /* ssl.ca-crl-file */ pconf->ssl_ca_crl_file = cpv->v.b; break; case 5: /* ssl.read-ahead */ pconf->ssl_read_ahead = (0 != cpv->v.u); break; case 6: /* ssl.disable-client-renegotiation */ pconf->ssl_disable_client_renegotiation = (0 != cpv->v.u); break; case 7: /* ssl.verifyclient.activate */ pconf->ssl_verifyclient = (0 != cpv->v.u); break; case 8: /* ssl.verifyclient.enforce */ pconf->ssl_verifyclient_enforce = (0 != cpv->v.u); break; case 9: /* ssl.verifyclient.depth */ pconf->ssl_verifyclient_depth = (unsigned char)cpv->v.shrt; break; case 10:/* ssl.verifyclient.username */ pconf->ssl_verifyclient_username = cpv->v.b; break; case 11:/* ssl.verifyclient.exportcert */ pconf->ssl_verifyclient_export_cert = (0 != cpv->v.u); break; case 12:/* ssl.acme-tls-1 */ pconf->ssl_acme_tls_1 = cpv->v.b; break; case 13:/* ssl.stapling-file */ break; case 14:/* debug.log-ssl-noise */ pconf->ssl_log_noise = (0 != cpv->v.u); break; default:/* should not happen */ return; } } static void mod_openssl_merge_config(plugin_config * const pconf, const config_plugin_value_t *cpv) { do { mod_openssl_merge_config_cpv(pconf, cpv); } while ((++cpv)->k_id != -1); } static void mod_openssl_patch_config (request_st * const r, plugin_config * const pconf) { plugin_data * const p = plugin_data_singleton; memcpy(pconf, &p->defaults, sizeof(plugin_config)); for (int i = 1, used = p->nconfig; i < used; ++i) { if (config_check_cond(r, (uint32_t)p->cvlist[i].k_id)) mod_openssl_merge_config(pconf, p->cvlist + p->cvlist[i].v.u2[0]); } } static int safer_X509_NAME_oneline(X509_NAME *name, char *buf, size_t sz) { #ifdef WOLFSSL_VERSION if (wolfSSL_X509_get_name_oneline(name, buf, (int)sz)) return (int)strlen(buf); #else BIO *bio = BIO_new(BIO_s_mem()); if (bio) { int len = X509_NAME_print_ex(bio, name, 0, XN_FLAG_ONELINE); BIO_gets(bio, buf, (int)sz); /*(may be truncated if len >= sz)*/ BIO_free(bio); return len; /*return value has similar semantics to that of snprintf()*/ } #endif else { buf[0] = '\0'; return -1; } } static void ssl_info_callback (const SSL *ssl, int where, int ret) { UNUSED(ret); if (0 != (where & SSL_CB_HANDSHAKE_START)) { handler_ctx *hctx = (handler_ctx *) SSL_get_app_data(ssl); if (hctx->renegotiations >= 0) ++hctx->renegotiations; } #ifdef TLS1_3_VERSION /* https://github.com/openssl/openssl/issues/5721 * "TLSv1.3 unexpected InfoCallback after handshake completed" */ if (0 != (where & SSL_CB_HANDSHAKE_DONE)) { /* SSL_version() is valid after initial handshake completed */ #ifdef WOLFSSL_VERSION SSL *ssl_nonconst; *(const SSL **)&ssl_nonconst = ssl; if (wolfSSL_GetVersion(ssl_nonconst) >= WOLFSSL_TLSV1_3) #else if (SSL_version(ssl) >= TLS1_3_VERSION) #endif { /* https://wiki.openssl.org/index.php/TLS1.3 * "Renegotiation is not possible in a TLSv1.3 connection" */ handler_ctx *hctx = (handler_ctx *) SSL_get_app_data(ssl); hctx->renegotiations = -1; } } #endif } /* https://wiki.openssl.org/index.php/Manual:SSL_CTX_set_verify(3)#EXAMPLES */ static int verify_callback(int preverify_ok, X509_STORE_CTX *ctx) { char buf[256]; X509 *err_cert; int err, depth; SSL *ssl; handler_ctx *hctx; err = X509_STORE_CTX_get_error(ctx); depth = X509_STORE_CTX_get_error_depth(ctx); /* * Retrieve the pointer to the SSL of the connection currently treated * and the application specific data stored into the SSL object. */ ssl = X509_STORE_CTX_get_ex_data(ctx, SSL_get_ex_data_X509_STORE_CTX_idx()); hctx = (handler_ctx *) SSL_get_app_data(ssl); /* * Catch a too long certificate chain. The depth limit set using * SSL_CTX_set_verify_depth() is by purpose set to "limit+1" so * that whenever the "depth>verify_depth" condition is met, we * have violated the limit and want to log this error condition. * We must do it here, because the CHAIN_TOO_LONG error would not * be found explicitly; only errors introduced by cutting off the * additional certificates would be logged. */ if (depth > hctx->conf.ssl_verifyclient_depth) { preverify_ok = 0; err = X509_V_ERR_CERT_CHAIN_TOO_LONG; X509_STORE_CTX_set_error(ctx, err); } if (preverify_ok && 0 == depth && NULL != hctx->conf.ssl_ca_dn_file) { /* verify that client cert is issued by CA in ssl.ca-dn-file * if both ssl.ca-dn-file and ssl.ca-file were configured */ STACK_OF(X509_NAME) * const cert_names = hctx->conf.ssl_ca_dn_file; X509_NAME *issuer; #if OPENSSL_VERSION_NUMBER >= 0x10002000L err_cert = X509_STORE_CTX_get_current_cert(ctx); #else err_cert = ctx->current_cert; #endif if (NULL == err_cert) return !hctx->conf.ssl_verifyclient_enforce; issuer = X509_get_issuer_name(err_cert); #if 0 /*(?desirable/undesirable to have cert_names sorted?)*/ if (-1 != sk_X509_NAME_find(cert_names, issuer)) return preverify_ok; /* match */ #else for (int i = 0, len = sk_X509_NAME_num(cert_names); i < len; ++i) { if (0 == X509_NAME_cmp(sk_X509_NAME_value(cert_names, i), issuer)) return preverify_ok; /* match */ } #endif preverify_ok = 0; err = X509_V_ERR_CERT_REJECTED; X509_STORE_CTX_set_error(ctx, err); } if (preverify_ok) { return preverify_ok; } #if OPENSSL_VERSION_NUMBER >= 0x10002000L err_cert = X509_STORE_CTX_get_current_cert(ctx); #else err_cert = ctx->current_cert; #endif if (NULL == err_cert) return !hctx->conf.ssl_verifyclient_enforce; safer_X509_NAME_oneline(X509_get_subject_name(err_cert),buf,sizeof(buf)); log_error_st *errh = hctx->r->conf.errh; log_error(errh, __FILE__, __LINE__, "SSL: verify error:num=%d:%s:depth=%d:subject=%s", err, X509_verify_cert_error_string(err), depth, buf); /* * At this point, err contains the last verification error. We can use * it for something special */ if (!preverify_ok && (err == X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY || err == X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT)) { safer_X509_NAME_oneline(X509_get_issuer_name(err_cert),buf,sizeof(buf)); log_error(errh, __FILE__, __LINE__, "SSL: issuer=%s", buf); } return !hctx->conf.ssl_verifyclient_enforce; } static int mod_openssl_cert_cb (SSL *ssl, void *arg) { handler_ctx *hctx = (handler_ctx *) SSL_get_app_data(ssl); plugin_cert *pc = hctx->conf.pc; UNUSED(arg); if (NULL == pc->ssl_pemfile_x509 || NULL == pc->ssl_pemfile_pkey) { /* x509/pkey available <=> pemfile was set <=> pemfile got patched: * so this should never happen, unless you nest $SERVER["socket"] */ log_error(hctx->r->conf.errh, __FILE__, __LINE__, "SSL: no certificate/private key for TLS server name %s", hctx->r->uri.authority.ptr); return 0; } /* first set certificate! * setting private key checks whether certificate matches it */ #ifdef WOLFSSL_VERSION buffer *cert = pc->ssl_pemfile_x509; if (1 != wolfSSL_use_certificate_ASN1(ssl, (unsigned char *)cert->ptr, (int)buffer_string_length(cert))) #else if (1 != SSL_use_certificate(ssl, pc->ssl_pemfile_x509)) #endif { log_error(hctx->r->conf.errh, __FILE__, __LINE__, "SSL: failed to set certificate for TLS server name %s: %s", hctx->r->uri.authority.ptr, ERR_error_string(ERR_get_error(), NULL)); return 0; } #if OPENSSL_VERSION_NUMBER >= 0x10002000 \ && !defined(LIBRESSL_VERSION_NUMBER) if (pc->ssl_pemfile_chain) SSL_set1_chain(ssl, pc->ssl_pemfile_chain); #ifndef BORINGSSL_API_VERSION /* BoringSSL limitation */ else if (hctx->conf.ssl_ca_file) { /* preserve legacy behavior whereby openssl will reuse CAs trusted for * certificate verification (set by SSL_CTX_load_verify_locations() in * SSL_CTX) in order to build certificate chain for server certificate * sent to client */ SSL_set1_chain_cert_store(ssl, hctx->conf.ssl_ca_file->certs); if (1 != SSL_build_cert_chain(ssl, SSL_BUILD_CHAIN_FLAG_NO_ROOT | SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR | SSL_BUILD_CHAIN_FLAG_CLEAR_ERROR)) { log_error(hctx->r->conf.errh, __FILE__, __LINE__, "SSL: building cert chain for TLS server name %s: %s", hctx->r->uri.authority.ptr, ERR_error_string(ERR_get_error(), NULL)); return 0; } else { /* copy chain for future reuse */ STACK_OF(X509) *chain = NULL; SSL_get0_chain_certs(ssl, &chain); pc->ssl_pemfile_chain = X509_chain_up_ref(chain); SSL_set1_chain_cert_store(ssl, NULL); } } #endif #endif #ifdef WOLFSSL_VERSION buffer *pkey = pc->ssl_pemfile_pkey; if (1 != wolfSSL_use_PrivateKey_buffer(ssl, (unsigned char *)pkey->ptr, (int)buffer_string_length(pkey), WOLFSSL_FILETYPE_ASN1)) #else if (1 != SSL_use_PrivateKey(ssl, pc->ssl_pemfile_pkey)) #endif { log_error(hctx->r->conf.errh, __FILE__, __LINE__, "SSL: failed to set private key for TLS server name %s: %s", hctx->r->uri.authority.ptr, ERR_error_string(ERR_get_error(), NULL)); return 0; } #ifndef OPENSSL_NO_OCSP #ifdef BORINGSSL_API_VERSION /* BoringSSL suggests API different than SSL_CTX_set_tlsext_status_cb() */ buffer *ocsp_resp = pc->ssl_stapling; if (NULL != ocsp_resp && !SSL_set_ocsp_response(ssl, (uint8_t *)CONST_BUF_LEN(ocsp_resp))) { log_error(hctx->r->conf.errh, __FILE__, __LINE__, "SSL: failed to set OCSP response for TLS server name %s: %s", hctx->r->uri.authority.ptr, ERR_error_string(ERR_get_error(), NULL)); return 0; } #endif #endif if (hctx->conf.ssl_verifyclient) { if (NULL == hctx->conf.ssl_ca_file) { log_error(hctx->r->conf.errh, __FILE__, __LINE__, "SSL: can't verify client without ssl.ca-file " "for TLS server name %s", hctx->r->uri.authority.ptr); return 0; } #if OPENSSL_VERSION_NUMBER >= 0x10002000 \ && !defined(LIBRESSL_VERSION_NUMBER) SSL_set1_verify_cert_store(ssl, hctx->conf.ssl_ca_file->certs); #endif /* WTH openssl? SSL_set_client_CA_list() calls set0_CA_list(), * but there is no set1_CA_list() to simply up the reference count * (without needing to duplicate the list) */ #ifndef WOLFSSL_VERSION /* WolfSSL limitation */ /* WolfSSL does not support setting per-session CA list; * limitation is to per-CTX CA list, and is not changed after SNI */ STACK_OF(X509_NAME) * const cert_names = hctx->conf.ssl_ca_dn_file ? hctx->conf.ssl_ca_dn_file : hctx->conf.ssl_ca_file->names; SSL_set_client_CA_list(ssl, SSL_dup_CA_list(cert_names)); #endif int mode = SSL_VERIFY_PEER; if (hctx->conf.ssl_verifyclient_enforce) mode |= SSL_VERIFY_FAIL_IF_NO_PEER_CERT; SSL_set_verify(ssl, mode, verify_callback); SSL_set_verify_depth(ssl, hctx->conf.ssl_verifyclient_depth + 1); } else { SSL_set_verify(ssl, SSL_VERIFY_NONE, NULL); } return 1; } #ifndef OPENSSL_NO_TLSEXT static int mod_openssl_SNI (handler_ctx *hctx, const char *servername, size_t len) { request_st * const r = hctx->r; if (len >= 1024) { /*(expecting < 256; TLSEXT_MAXLEN_host_name is 255)*/ log_error(r->conf.errh, __FILE__, __LINE__, "SSL: SNI name too long %.*s", (int)len, servername); return SSL_TLSEXT_ERR_ALERT_FATAL; } /* use SNI to patch mod_openssl config and then reset COMP_HTTP_HOST */ buffer_copy_string_len(&r->uri.authority, servername, len); buffer_to_lower(&r->uri.authority); #if 0 /*(r->uri.authority used below for configuration before request read; * revisit for h2)*/ if (0 != http_request_host_policy(&r->uri.authority, r->conf.http_parseopts, 443)) return SSL_TLSEXT_ERR_ALERT_FATAL; #endif r->conditional_is_valid |= (1 << COMP_HTTP_SCHEME) | (1 << COMP_HTTP_HOST); mod_openssl_patch_config(r, &hctx->conf); /* reset COMP_HTTP_HOST so that conditions re-run after request hdrs read */ /*(done in response.c:config_cond_cache_reset() after request hdrs read)*/ /*config_cond_cache_reset_item(r, COMP_HTTP_HOST);*/ /*buffer_clear(&r->uri.authority);*/ #if OPENSSL_VERSION_NUMBER >= 0x10002000L \ && !defined(LIBRESSL_VERSION_NUMBER) return SSL_TLSEXT_ERR_OK; #else return (mod_openssl_cert_cb(hctx->ssl, NULL) == 1) ? SSL_TLSEXT_ERR_OK : SSL_TLSEXT_ERR_ALERT_FATAL; #endif } #ifdef SSL_CLIENT_HELLO_SUCCESS static int mod_openssl_client_hello_cb (SSL *ssl, int *al, void *srv) { handler_ctx *hctx = (handler_ctx *) SSL_get_app_data(ssl); buffer_copy_string(&hctx->r->uri.scheme, "https"); UNUSED(srv); const unsigned char *name; size_t len, slen; if (!SSL_client_hello_get0_ext(ssl, TLSEXT_TYPE_server_name, &name, &len)) { return SSL_CLIENT_HELLO_SUCCESS; /* client did not provide SNI */ } /* expecting single element in the server_name extension; parse first one */ if (len > 5 && (size_t)((name[0] << 8) + name[1]) == len-2 && name[2] == TLSEXT_TYPE_server_name && (slen = (name[3] << 8) + name[4]) <= len-5) { /*(first)*/ int read_ahead = hctx->conf.ssl_read_ahead; int rc = mod_openssl_SNI(hctx, (const char *)name+5, slen); if (!read_ahead && hctx->conf.ssl_read_ahead) SSL_set_read_ahead(ssl, hctx->conf.ssl_read_ahead); if (rc == SSL_TLSEXT_ERR_OK) return SSL_CLIENT_HELLO_SUCCESS; } *al = TLS1_AD_UNRECOGNIZED_NAME; return SSL_CLIENT_HELLO_ERROR; } #else static int network_ssl_servername_callback (SSL *ssl, int *al, void *srv) { handler_ctx *hctx = (handler_ctx *) SSL_get_app_data(ssl); buffer_copy_string(&hctx->r->uri.scheme, "https"); UNUSED(al); UNUSED(srv); #ifdef WOLFSSL_VERSION const char *servername; size_t len = (size_t) wolfSSL_SNI_GetRequest(ssl, WOLFSSL_SNI_HOST_NAME, (void **)&servername); if (0 == len) return SSL_TLSEXT_ERR_NOACK; /* client did not provide SNI */ #else const char *servername = SSL_get_servername(ssl, TLSEXT_NAMETYPE_host_name); if (NULL == servername) return SSL_TLSEXT_ERR_NOACK; /* client did not provide SNI */ size_t len = strlen(servername); #endif int read_ahead = hctx->conf.ssl_read_ahead; int rc = mod_openssl_SNI(hctx, servername, len); if (!read_ahead && hctx->conf.ssl_read_ahead) SSL_set_read_ahead(ssl, hctx->conf.ssl_read_ahead); return rc; } #endif #endif #ifndef WOLFSSL_VERSION static X509 * mod_openssl_load_pem_file (const char *file, log_error_st *errh, STACK_OF(X509) **chain) { *chain = NULL; off_t dlen = 512*1024*1024;/*(arbitrary limit: 512 MB file; expect < 1 MB)*/ char *data = fdevent_load_file(file, &dlen, errh, malloc, free); if (NULL == data) return NULL; BIO *in = BIO_new_mem_buf(data, (int)dlen); if (NULL == in) { log_error(errh, __FILE__, __LINE__, "SSL: BIO_new/BIO_read_filename('%s') failed", file); if (dlen) safe_memclear(data, dlen); free(data); return NULL; } X509 *x = PEM_read_bio_X509_AUX_secmem(in, NULL, NULL, NULL); if (NULL == x) { log_error(errh, __FILE__, __LINE__, "SSL: couldn't read X509 certificate from '%s'", file); } else if (!mod_openssl_load_X509_sk(file, errh, chain, in)) { X509_free(x); x = NULL; } BIO_free(in); if (dlen) safe_memclear(data, dlen); free(data); return x; } #endif #ifndef WOLFSSL_VERSION static EVP_PKEY * mod_openssl_evp_pkey_load_pem_file (const char *file, log_error_st *errh) { off_t dlen = 512*1024*1024;/*(arbitrary limit: 512 MB file; expect < 1 MB)*/ char *data = fdevent_load_file(file, &dlen, errh, malloc, free); if (NULL == data) return NULL; EVP_PKEY *x = NULL; BIO *in = BIO_new_mem_buf(data, (int)dlen); if (NULL != in) { x = PEM_read_bio_PrivateKey(in, NULL, NULL, NULL); BIO_free(in); } if (dlen) safe_memclear(data, dlen); free(data); if (NULL == in) log_error(errh, __FILE__, __LINE__, "SSL: BIO_new/BIO_read_filename('%s') failed", file); else if (NULL == x) log_error(errh, __FILE__, __LINE__, "SSL: couldn't read private key from '%s'", file); return x; } #endif #ifndef OPENSSL_NO_OCSP #ifdef WOLFSSL_VERSION #define OCSP_RESPONSE OcspResponse #define OCSP_RESPONSE_free wolfSSL_OCSP_RESPONSE_free #define d2i_OCSP_RESPONSE_bio wolfSSL_d2i_OCSP_RESPONSE_bio #define d2i_OCSP_RESPONSE wolfSSL_d2i_OCSP_RESPONSE #define i2d_OCSP_RESPONSE wolfSSL_i2d_OCSP_RESPONSE #endif static buffer * mod_openssl_load_stapling_file (const char *file, log_error_st *errh, buffer *b) { /* load stapling .der into buffer *b only if successful * * Note: for some TLS libs, the OCSP stapling response is not copied when * assigned to a session (and is reasonable since not changed frequently) * - BoringSSL SSL_set_ocsp_response() * - WolfSSL SSL_set_tlsext_status_ocsp_resp() (differs from OpenSSL API) * Therefore, there is a potential race condition if the OCSP response is * assigned to the session during the handshake and the Server Hello is * partially sent, AND (unlikely, if possible at all), the TLS library is * in the middle of reading this OSCP response buffer. If the OCSP response * is replaced due to an updated ssl.stapling-file (checked periodically), * AND the buffer is resized, this would be a problem. Resizing the buffer * is unlikely since updated OSCP response for same certificate are * typically the same size with the signature and dates refreshed. */ /* load raw .der file */ off_t dlen = 1*1024*1024;/*(arbitrary limit: 1 MB file; expect < 1 KB)*/ char *data = fdevent_load_file(file, &dlen, errh, malloc, free); if (NULL == data) return NULL; #if defined(BORINGSSL_API_VERSION) \ || defined(WOLFSSL_VERSION) if (NULL == b) b = buffer_init(); else if (b->ptr) free(b->ptr); b->ptr = data; b->used = (uint32_t)dlen; b->size = (uint32_t)dlen+1; return b; #else BIO *in = BIO_new_mem_buf(data, (int)dlen); if (NULL == in) { log_error(errh, __FILE__, __LINE__, "SSL: BIO_new/BIO_read_filename('%s') failed", file); free(data); return NULL; } OCSP_RESPONSE *x = d2i_OCSP_RESPONSE_bio(in, NULL); BIO_free(in); free(data); if (NULL == x) { log_error(errh, __FILE__, __LINE__, "SSL: OCSP stapling file read error: %s %s", ERR_error_string(ERR_get_error(), NULL), file); return NULL; } unsigned char *rspder = NULL; int rspderlen = i2d_OCSP_RESPONSE(x, &rspder); if (rspderlen > 0) { if (NULL == b) b = buffer_init(); buffer_copy_string_len(b, (char *)rspder, (uint32_t)rspderlen); } OPENSSL_free(rspder); OCSP_RESPONSE_free(x); return rspderlen ? b : NULL; #endif } #if !defined(BORINGSSL_API_VERSION) && !defined(WOLFSSL_VERSION) static time_t mod_openssl_asn1_time_to_posix (ASN1_TIME *asn1time) { #ifdef LIBRESSL_VERSION_NUMBER /* LibreSSL was forked from OpenSSL 1.0.1; does not have ASN1_TIME_diff */ /*(Note: all certificate times are expected to use UTC)*/ /*(Note: does not strictly validate string contains appropriate digits)*/ /*(Note: incorrectly assumes GMT if 'Z' or offset not provided)*/ /*(Note: incorrectly ignores if local timezone might be in DST)*/ if (NULL == asn1time || NULL == asn1time->data) return (time_t)-1; const char *s = (const char *)asn1time->data; size_t len = strlen(s); struct tm x; x.tm_isdst = 0; x.tm_yday = 0; x.tm_wday = 0; switch (asn1time->type) { case V_ASN1_UTCTIME: /* 2-digit year */ if (len < 8) return (time_t)-1; len -= 8; x.tm_year = (s[0]-'0')*10 + (s[1]-'0'); x.tm_year += (x.tm_year < 50 ? 2000 : 1900); s += 2; break; case V_ASN1_GENERALIZEDTIME: /* 4-digit year */ if (len < 10) return (time_t)-1; len -= 10; x.tm_year = (s[0]-'0')*1000+(s[1]-'0')*100+(s[2]-'0')*10+(s[3]-'0'); s += 4; break; default: return (time_t)-1; } x.tm_mon = (s[0]-'0')*10 + (s[1]-'0'); x.tm_mday = (s[2]-'0')*10 + (s[3]-'0'); x.tm_hour = (s[4]-'0')*10 + (s[5]-'0'); x.tm_min = 0; x.tm_sec = 0; s += 6; if (len >= 2 && s[0] != '+' && s[0] != '-' && s[0] != 'Z') { len -= 2; x.tm_min = (s[0]-'0')*10 + (s[1]-'0'); s += 2; if (len >= 2 && s[0] != '+' && s[0] != '-' && s[0] != 'Z') { len -= 2; x.tm_sec = (s[0]-'0')*10 + (s[1]-'0'); s += 2; if (len && s[0] == '.') { /*(ignore .fff fractional seconds; * should be up to 3 digits but we ignore more)*/ do { ++s; --len; } while (*s >= '0' && *s <= '9'); } } } int offset = 0; if ((*s == '-' || *s == '+') && len != 5) { offset = ((s[1]-'0')*10 + (s[2]-'0')) * 3600 + ((s[3]-'0')*10 + (s[4]-'0')) * 60; if (*s == '-') offset = -offset; } else if (s[0] != '\0' && (s[0] != 'Z' || s[1] != '\0')) return (time_t)-1; if (x.tm_year == 9999 && x.tm_mon == 12 && x.tm_mday == 31 && x.tm_hour == 23 && x.tm_min == 59 && x.tm_sec == 59 && s[0] == 'Z') return (time_t)-1; // 99991231235959Z RFC 5280 #if 0 #if defined(_WIN32) && !defined(__CYGWIN__) #define timegm(x) _mkgmtime(x) #endif /* timegm() might not be available, and mktime() is sensitive to TZ */ x.tm_year-= 1900; x.tm_mon -= 1; time_t t = timegm(&d); return (t != (time_t)-1) ? t + offset : t; #else int y = x.tm_year; int m = x.tm_mon; int d = x.tm_mday; /* days_from_civil() http://howardhinnant.github.io/date_algorithms.html */ y -= m <= 2; int era = y / 400; int yoe = y - era * 400; // [0, 399] int doy = (153 * (m + (m > 2 ? -3 : 9)) + 2) / 5 + d - 1; // [0, 365] int doe = yoe * 365 + yoe / 4 - yoe / 100 + doy; // [0, 146096] int days_since_1970 = era * 146097 + doe - 719468; return 60*(60*(24L*days_since_1970+x.tm_hour)+x.tm_min)+x.tm_sec+offset; #endif #else /* Note: this does not check for integer overflow of time_t! */ int day, sec; return ASN1_TIME_diff(&day, &sec, NULL, asn1time) ? log_epoch_secs + day*86400 + sec : (time_t)-1; #endif } #endif static time_t mod_openssl_ocsp_next_update (plugin_cert *pc) { #if defined(BORINGSSL_API_VERSION) || defined(WOLFSSL_VERSION) UNUSED(pc); return (time_t)-1; /*(not implemented)*/ #else buffer *der = pc->ssl_stapling; const unsigned char *p = (unsigned char *)der->ptr; /*(p gets modified)*/ OCSP_RESPONSE *ocsp = d2i_OCSP_RESPONSE(NULL,&p,buffer_string_length(der)); if (NULL == ocsp) return (time_t)-1; OCSP_BASICRESP *bs = OCSP_response_get1_basic(ocsp); if (NULL == bs) { OCSP_RESPONSE_free(ocsp); return (time_t)-1; } /* XXX: should save and evaluate cert status returned by these calls */ ASN1_TIME *nextupd = NULL; #ifdef WOLFSSL_VERSION /* WolfSSL limitation */ /* WolfSSL does not provide OCSP_resp_get0() OCSP_single_get0_status() */ /* (inactive code path; alternative path followed in #if above for WolfSSL) * (chain not currently available in mod_openssl when used with WolfSSL) * (For WolfSSL, pc->ssl_pemfile_chain might not be filled in with actual * chain, but is used to store (buffer **) of DER decoded from PEM certs * read from ssl.pemfile, which may be a single cert, pc->ssl_pemfile_x509. * The chain is not calculated or filled in if single cert, and neither are * (X509 *), though (X509 *) could be temporarily created to calculated * (OCSP_CERTID *), which additionally could be calculated once at startup) */ OCSP_CERTID *id = (NULL != pc->ssl_pemfile_chain) ? OCSP_cert_to_id(NULL, pc->ssl_pemfile_x509, sk_X509_value(pc->ssl_pemfile_chain, 0)) : NULL; if (id == NULL) { OCSP_BASICRESP_free(bs); OCSP_RESPONSE_free(ocsp); return (time_t)-1; } OCSP_resp_find_status(bs, id, NULL, NULL, NULL, NULL, &nextupd); OCSP_CERTID_free(id); #else OCSP_single_get0_status(OCSP_resp_get0(bs, 0), NULL, NULL, NULL, &nextupd); #endif time_t t = nextupd ? mod_openssl_asn1_time_to_posix(nextupd) : (time_t)-1; /* Note: trust external process which creates ssl.stapling-file to verify * (as well as to validate certificate status) * future: verify OCSP response here to double-check */ OCSP_BASICRESP_free(bs); OCSP_RESPONSE_free(ocsp); return t; #endif } static int mod_openssl_reload_stapling_file (server *srv, plugin_cert *pc, const time_t cur_ts) { buffer *b = mod_openssl_load_stapling_file(pc->ssl_stapling_file->ptr, srv->errh, pc->ssl_stapling); if (!b) return 0; pc->ssl_stapling = b; /*(unchanged unless orig was NULL)*/ pc->ssl_stapling_loadts = cur_ts; pc->ssl_stapling_nextts = mod_openssl_ocsp_next_update(pc); if (pc->ssl_stapling_nextts == (time_t)-1) { /* "Next Update" might not be provided by OCSP responder * Use 3600 sec (1 hour) in that case. */ /* retry in 1 hour if unable to determine Next Update */ pc->ssl_stapling_nextts = cur_ts + 3600; pc->ssl_stapling_loadts = 0; } return 1; } static int mod_openssl_refresh_stapling_file (server *srv, plugin_cert *pc, const time_t cur_ts) { if (pc->ssl_stapling && pc->ssl_stapling_nextts - 256 > cur_ts) return 1; /* skip check for refresh unless close to expire */ struct stat st; if (0 != stat(pc->ssl_stapling_file->ptr, &st) || st.st_mtime <= pc->ssl_stapling_loadts) { if (pc->ssl_stapling_nextts < cur_ts) { /* discard expired OCSP stapling response */ buffer_free(pc->ssl_stapling); pc->ssl_stapling = NULL; if (pc->must_staple) { log_error(srv->errh, __FILE__, __LINE__, "certificate marked OCSP Must-Staple, " "but OCSP response expired from ssl.stapling-file %s", pc->ssl_stapling_file->ptr); } } return 1; } return mod_openssl_reload_stapling_file(srv, pc, cur_ts); } static void mod_openssl_refresh_stapling_files (server *srv, const plugin_data *p, const time_t cur_ts) { /* future: might construct array of (plugin_cert *) at startup * to avoid the need to search for them here */ for (int i = 0, used = p->nconfig; i < used; ++i) { const config_plugin_value_t *cpv = p->cvlist + p->cvlist[i].v.u2[0]; for (; cpv->k_id != -1; ++cpv) { if (cpv->k_id != 0) continue; /* k_id == 0 for ssl.pemfile */ if (cpv->vtype != T_CONFIG_LOCAL) continue; plugin_cert *pc = cpv->v.v; if (!buffer_string_is_empty(pc->ssl_stapling_file)) mod_openssl_refresh_stapling_file(srv, pc, cur_ts); } } } static int mod_openssl_crt_must_staple (const X509 *crt) { #if OPENSSL_VERSION_NUMBER < 0x10100000L \ || defined(BORINGSSL_API_VERSION) \ || defined(LIBRESSL_VERSION_NUMBER) /*(not currently supported in BoringSSL or LibreSSL)*/ UNUSED(crt); return 0; #else /* openssl/x509v3.h:typedef STACK_OF(ASN1_INTEGER) TLS_FEATURE; */ TLS_FEATURE *tlsf = X509_get_ext_d2i(crt, NID_tlsfeature, NULL, NULL); if (NULL == tlsf) return 0; int rc = 0; for (int i = 0; i < sk_ASN1_INTEGER_num(tlsf); ++i) { ASN1_INTEGER *ai = sk_ASN1_INTEGER_value(tlsf, i); long tlsextid = ASN1_INTEGER_get(ai); if (tlsextid == 5) { /* 5 = OCSP Must-Staple */ rc = 1; break; } } sk_ASN1_INTEGER_pop_free(tlsf, ASN1_INTEGER_free); return rc; /* 1 if OCSP Must-Staple found; 0 if not */ #endif } #endif /* OPENSSL_NO_OCSP */ static plugin_cert * network_openssl_load_pemfile (server *srv, const buffer *pemfile, const buffer *privkey, const buffer *ssl_stapling_file) { if (!mod_openssl_init_once_openssl(srv)) return NULL; #ifdef WOLFSSL_VERSION buffer **ssl_pemfile_chain = NULL; buffer *ssl_pemfile_x509 = mod_wolfssl_load_pem_file(pemfile->ptr, srv->errh, &ssl_pemfile_chain); if (NULL == ssl_pemfile_x509) return NULL; buffer *ssl_pemfile_pkey = mod_wolfssl_evp_pkey_load_pem_file(privkey->ptr, srv->errh); if (NULL == ssl_pemfile_pkey) { /*buffer_free(ssl_pemfile_x509);*//*(part of chain)*/ mod_wolfssl_free_der_certs(ssl_pemfile_chain); return NULL; } /* X509_check_private_key() is a stub func (not implemented) in WolfSSL */ #else STACK_OF(X509) *ssl_pemfile_chain = NULL; X509 *ssl_pemfile_x509 = mod_openssl_load_pem_file(pemfile->ptr, srv->errh, &ssl_pemfile_chain); if (NULL == ssl_pemfile_x509) return NULL; EVP_PKEY *ssl_pemfile_pkey = mod_openssl_evp_pkey_load_pem_file(privkey->ptr, srv->errh); if (NULL == ssl_pemfile_pkey) { X509_free(ssl_pemfile_x509); sk_X509_pop_free(ssl_pemfile_chain, X509_free); return NULL; } if (!X509_check_private_key(ssl_pemfile_x509, ssl_pemfile_pkey)) { log_error(srv->errh, __FILE__, __LINE__, "SSL:" "Private key does not match the certificate public key, " "reason: %s %s %s", ERR_error_string(ERR_get_error(), NULL), pemfile->ptr, privkey->ptr); EVP_PKEY_free(ssl_pemfile_pkey); X509_free(ssl_pemfile_x509); sk_X509_pop_free(ssl_pemfile_chain, X509_free); return NULL; } #endif plugin_cert *pc = malloc(sizeof(plugin_cert)); force_assert(pc); pc->ssl_pemfile_pkey = ssl_pemfile_pkey; pc->ssl_pemfile_x509 = ssl_pemfile_x509; pc->ssl_pemfile_chain= ssl_pemfile_chain; pc->ssl_pemfile = pemfile; pc->ssl_privkey = privkey; pc->ssl_stapling = NULL; pc->ssl_stapling_file= ssl_stapling_file; pc->ssl_stapling_loadts = 0; pc->ssl_stapling_nextts = 0; #ifndef OPENSSL_NO_OCSP #ifdef WOLFSSL_VERSION /*(not implemented for WolfSSL, though could convert the DER to (X509 *), * check Must-Staple, and then destroy (X509 *))*/ (void)mod_openssl_crt_must_staple(NULL); pc->must_staple = 0; #else pc->must_staple = mod_openssl_crt_must_staple(ssl_pemfile_x509); #endif #else pc->must_staple = 0; #endif if (!buffer_string_is_empty(pc->ssl_stapling_file)) { #ifndef OPENSSL_NO_OCSP if (!mod_openssl_reload_stapling_file(srv, pc, log_epoch_secs)) { /* continue without OCSP response if there is an error */ } #else log_error(srv->errh, __FILE__, __LINE__, "SSL:" "OCSP stapling not supported; ignoring %s", pc->ssl_stapling_file->ptr); #endif } else if (pc->must_staple) { log_error(srv->errh, __FILE__, __LINE__, "certificate %s marked OCSP Must-Staple, " "but ssl.stapling-file not provided", pemfile->ptr); } return pc; } #ifndef OPENSSL_NO_TLSEXT #ifdef TLSEXT_TYPE_application_layer_protocol_negotiation static int mod_openssl_acme_tls_1 (SSL *ssl, handler_ctx *hctx) { buffer * const b = hctx->tmp_buf; const buffer * const name = &hctx->r->uri.authority; log_error_st * const errh = hctx->r->conf.errh; #ifdef WOLFSSL_VERSION buffer *ssl_pemfile_x509 = NULL; buffer *ssl_pemfile_pkey = NULL; buffer **ssl_pemfile_chain = NULL; #else X509 *ssl_pemfile_x509 = NULL; STACK_OF(X509) *ssl_pemfile_chain = NULL; EVP_PKEY *ssl_pemfile_pkey = NULL; #endif size_t len; int rc = SSL_TLSEXT_ERR_ALERT_FATAL; /* check if acme-tls/1 protocol is enabled (path to dir of cert(s) is set)*/ if (buffer_string_is_empty(hctx->conf.ssl_acme_tls_1)) return SSL_TLSEXT_ERR_NOACK; /*(reuse value here for not-configured)*/ buffer_copy_buffer(b, hctx->conf.ssl_acme_tls_1); buffer_append_slash(b); /* check if SNI set server name (required for acme-tls/1 protocol) * and perform simple path checks for no '/' * and no leading '.' (e.g. ignore "." or ".." or anything beginning '.') */ if (buffer_string_is_empty(name)) return rc; if (NULL != strchr(name->ptr, '/')) return rc; if (name->ptr[0] == '.') return rc; #if 0 if (0 != http_request_host_policy(name,hctx->r->conf.http_parseopts,443)) return rc; #endif buffer_append_string_buffer(b, name); len = buffer_string_length(b); do { buffer_append_string_len(b, CONST_STR_LEN(".crt.pem")); #ifdef WOLFSSL_VERSION ssl_pemfile_x509 = mod_wolfssl_load_pem_file(b->ptr, errh, &ssl_pemfile_chain); #else ssl_pemfile_x509 = mod_openssl_load_pem_file(b->ptr, errh, &ssl_pemfile_chain); #endif if (NULL == ssl_pemfile_x509) { log_error(errh, __FILE__, __LINE__, "SSL: Failed to load acme-tls/1 pemfile: %s", b->ptr); break; } buffer_string_set_length(b, len); /*(remove ".crt.pem")*/ buffer_append_string_len(b, CONST_STR_LEN(".key.pem")); #ifdef WOLFSSL_VERSION ssl_pemfile_pkey = mod_wolfssl_evp_pkey_load_pem_file(b->ptr, errh); #else ssl_pemfile_pkey = mod_openssl_evp_pkey_load_pem_file(b->ptr, errh); #endif if (NULL == ssl_pemfile_pkey) { log_error(errh, __FILE__, __LINE__, "SSL: Failed to load acme-tls/1 pemfile: %s", b->ptr); break; } #if 0 /* redundant with below? */ if (!X509_check_private_key(ssl_pemfile_x509, ssl_pemfile_pkey)) { log_error(errh, __FILE__, __LINE__, "SSL: Private key does not match acme-tls/1 " "certificate public key, reason: %s %s" ERR_error_string(ERR_get_error(), NULL), b->ptr); break; } #endif /* first set certificate! * setting private key checks whether certificate matches it */ #ifdef WOLFSSL_VERSION buffer *cert = ssl_pemfile_x509; if (1 != wolfSSL_use_certificate_ASN1(ssl, (unsigned char *)cert->ptr, (int)buffer_string_length(cert))) #else if (1 != SSL_use_certificate(ssl, ssl_pemfile_x509)) #endif { log_error(errh, __FILE__, __LINE__, "SSL: failed to set acme-tls/1 certificate for TLS server " "name %s: %s", name->ptr, ERR_error_string(ERR_get_error(),NULL)); break; } if (ssl_pemfile_chain) { #ifndef WOLFSSL_VERSION /* WolfSSL limitation */ /* WolfSSL does not support setting per-session chain; * limitation is to per-CTX chain, and so chain is not provided for * "acme-tls/1" (might be non-issue; chain might not be present) */ SSL_set0_chain(ssl, ssl_pemfile_chain); ssl_pemfile_chain = NULL; #endif } #ifdef WOLFSSL_VERSION buffer *pkey = ssl_pemfile_pkey; if (1 != wolfSSL_use_PrivateKey_buffer(ssl, (unsigned char *)pkey->ptr, (int)buffer_string_length(pkey), WOLFSSL_FILETYPE_ASN1)) #else if (1 != SSL_use_PrivateKey(ssl, ssl_pemfile_pkey)) #endif { log_error(errh, __FILE__, __LINE__, "SSL: failed to set acme-tls/1 private key for TLS server " "name %s: %s", name->ptr, ERR_error_string(ERR_get_error(),NULL)); break; } hctx->conf.ssl_verifyclient_enforce = 0; SSL_set_verify(ssl, SSL_VERIFY_NONE, NULL); rc = SSL_TLSEXT_ERR_OK; } while (0); #ifdef WOLFSSL_VERSION if (ssl_pemfile_pkey) buffer_free(ssl_pemfile_pkey); /*if (ssl_pemfile_x509) buffer_free(ssl_pemfile_x509);*//*(part of chain)*/ mod_wolfssl_free_der_certs(ssl_pemfile_chain); #else if (ssl_pemfile_pkey) EVP_PKEY_free(ssl_pemfile_pkey); if (ssl_pemfile_x509) X509_free(ssl_pemfile_x509); if (ssl_pemfile_chain) sk_X509_pop_free(ssl_pemfile_chain, X509_free); #endif return rc; } enum { MOD_OPENSSL_ALPN_HTTP11 = 1 ,MOD_OPENSSL_ALPN_HTTP10 = 2 ,MOD_OPENSSL_ALPN_H2 = 3 ,MOD_OPENSSL_ALPN_ACME_TLS_1 = 4 }; /* https://www.iana.org/assignments/tls-extensiontype-values/tls-extensiontype-values.xhtml#alpn-protocol-ids */ static int mod_openssl_alpn_select_cb (SSL *ssl, const unsigned char **out, unsigned char *outlen, const unsigned char *in, unsigned int inlen, void *arg) { handler_ctx *hctx = (handler_ctx *) SSL_get_app_data(ssl); unsigned short proto; UNUSED(arg); for (unsigned int i = 0, n; i < inlen; i += n) { n = in[i++]; if (i+n > inlen || 0 == n) break; switch (n) { case 2: /* "h2" */ if (in[i] == 'h' && in[i+1] == '2') { if (!hctx->r->conf.h2proto) continue; proto = MOD_OPENSSL_ALPN_H2; hctx->r->http_version = HTTP_VERSION_2; break; } continue; case 8: /* "http/1.1" "http/1.0" */ if (0 == memcmp(in+i, "http/1.", 7)) { if (in[i+7] == '1') { proto = MOD_OPENSSL_ALPN_HTTP11; break; } if (in[i+7] == '0') { proto = MOD_OPENSSL_ALPN_HTTP10; break; } } continue; case 10: /* "acme-tls/1" */ if (0 == memcmp(in+i, "acme-tls/1", 10)) { int rc = mod_openssl_acme_tls_1(ssl, hctx); if (rc == SSL_TLSEXT_ERR_OK) { proto = MOD_OPENSSL_ALPN_ACME_TLS_1; break; } /* (use SSL_TLSEXT_ERR_NOACK for not-configured) */ if (rc == SSL_TLSEXT_ERR_NOACK) continue; return rc; } continue; default: continue; } hctx->alpn = proto; *out = in+i; *outlen = n; return SSL_TLSEXT_ERR_OK; } #if OPENSSL_VERSION_NUMBER < 0x10100000L return SSL_TLSEXT_ERR_NOACK; #else return SSL_TLSEXT_ERR_ALERT_FATAL; #endif } #endif /* TLSEXT_TYPE_application_layer_protocol_negotiation */ #endif /* OPENSSL_NO_TLSEXT */ #if defined(BORINGSSL_API_VERSION) \ || defined(LIBRESSL_VERSION_NUMBER) \ || defined(WOLFSSL_VERSION) static int mod_openssl_ssl_conf_cmd (server *srv, plugin_config_socket *s); #endif static int network_openssl_ssl_conf_cmd (server *srv, plugin_config_socket *s) { #ifdef SSL_CONF_FLAG_CMDLINE int rc = 0; const data_string *ds; SSL_CONF_CTX * const cctx = SSL_CONF_CTX_new(); SSL_CONF_CTX_set_ssl_ctx(cctx, s->ssl_ctx); SSL_CONF_CTX_set_flags(cctx, SSL_CONF_FLAG_FILE | SSL_CONF_FLAG_SERVER | SSL_CONF_FLAG_SHOW_ERRORS | SSL_CONF_FLAG_CERTIFICATE); /* always disable null and export ciphers */ ds = (const data_string *) array_get_element_klen(s->ssl_conf_cmd, CONST_STR_LEN("CipherString")); if (NULL != ds) { buffer *cipher_string = array_get_buf_ptr(s->ssl_conf_cmd, CONST_STR_LEN("CipherString")); buffer_append_string_len(cipher_string, CONST_STR_LEN(":!aNULL:!eNULL:!EXP")); } for (size_t i = 0; i < s->ssl_conf_cmd->used; ++i) { ds = (data_string *)s->ssl_conf_cmd->data[i]; ERR_clear_error(); if (SSL_CONF_cmd(cctx, ds->key.ptr, ds->value.ptr) <= 0) { log_error(srv->errh, __FILE__, __LINE__, "SSL: SSL_CONF_cmd %s %s: %s", ds->key.ptr, ds->value.ptr, ERR_error_string(ERR_get_error(), NULL)); rc = -1; break; } } if (0 == rc && 1 != SSL_CONF_CTX_finish(cctx)) { log_error(srv->errh, __FILE__, __LINE__, "SSL: SSL_CONF_CTX_finish(): %s", ERR_error_string(ERR_get_error(), NULL)); rc = -1; } SSL_CONF_CTX_free(cctx); return rc; #elif defined(BORINGSSL_API_VERSION) \ || defined(LIBRESSL_VERSION_NUMBER) \ || defined(WOLFSSL_VERSION) return mod_openssl_ssl_conf_cmd(srv, s); #else UNUSED(s); log_error(srv->errh, __FILE__, __LINE__, "SSL: ssl.openssl.ssl-conf-cmd not available; ignored"); return 0; #endif } #ifndef OPENSSL_NO_DH #if OPENSSL_VERSION_NUMBER < 0x10100000L \ || defined(LIBRESSL_VERSION_NUMBER) #define DH_set0_pqg(dh, dh_p, NULL, dh_g) \ ((dh)->p = (dh_p), (dh)->g = (dh_g), (dh_p) != NULL && (dh_g != NULL)) #endif /* https://tools.ietf.org/html/rfc7919#appendix-A.1 * A.1. ffdhe2048 * * https://ssl-config.mozilla.org/ffdhe2048.txt * C code generated with: openssl dhparam -C -in ffdhe2048.txt */ static DH *get_dh2048(void) { static unsigned char dhp_2048[] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xAD, 0xF8, 0x54, 0x58, 0xA2, 0xBB, 0x4A, 0x9A, 0xAF, 0xDC, 0x56, 0x20, 0x27, 0x3D, 0x3C, 0xF1, 0xD8, 0xB9, 0xC5, 0x83, 0xCE, 0x2D, 0x36, 0x95, 0xA9, 0xE1, 0x36, 0x41, 0x14, 0x64, 0x33, 0xFB, 0xCC, 0x93, 0x9D, 0xCE, 0x24, 0x9B, 0x3E, 0xF9, 0x7D, 0x2F, 0xE3, 0x63, 0x63, 0x0C, 0x75, 0xD8, 0xF6, 0x81, 0xB2, 0x02, 0xAE, 0xC4, 0x61, 0x7A, 0xD3, 0xDF, 0x1E, 0xD5, 0xD5, 0xFD, 0x65, 0x61, 0x24, 0x33, 0xF5, 0x1F, 0x5F, 0x06, 0x6E, 0xD0, 0x85, 0x63, 0x65, 0x55, 0x3D, 0xED, 0x1A, 0xF3, 0xB5, 0x57, 0x13, 0x5E, 0x7F, 0x57, 0xC9, 0x35, 0x98, 0x4F, 0x0C, 0x70, 0xE0, 0xE6, 0x8B, 0x77, 0xE2, 0xA6, 0x89, 0xDA, 0xF3, 0xEF, 0xE8, 0x72, 0x1D, 0xF1, 0x58, 0xA1, 0x36, 0xAD, 0xE7, 0x35, 0x30, 0xAC, 0xCA, 0x4F, 0x48, 0x3A, 0x79, 0x7A, 0xBC, 0x0A, 0xB1, 0x82, 0xB3, 0x24, 0xFB, 0x61, 0xD1, 0x08, 0xA9, 0x4B, 0xB2, 0xC8, 0xE3, 0xFB, 0xB9, 0x6A, 0xDA, 0xB7, 0x60, 0xD7, 0xF4, 0x68, 0x1D, 0x4F, 0x42, 0xA3, 0xDE, 0x39, 0x4D, 0xF4, 0xAE, 0x56, 0xED, 0xE7, 0x63, 0x72, 0xBB, 0x19, 0x0B, 0x07, 0xA7, 0xC8, 0xEE, 0x0A, 0x6D, 0x70, 0x9E, 0x02, 0xFC, 0xE1, 0xCD, 0xF7, 0xE2, 0xEC, 0xC0, 0x34, 0x04, 0xCD, 0x28, 0x34, 0x2F, 0x61, 0x91, 0x72, 0xFE, 0x9C, 0xE9, 0x85, 0x83, 0xFF, 0x8E, 0x4F, 0x12, 0x32, 0xEE, 0xF2, 0x81, 0x83, 0xC3, 0xFE, 0x3B, 0x1B, 0x4C, 0x6F, 0xAD, 0x73, 0x3B, 0xB5, 0xFC, 0xBC, 0x2E, 0xC2, 0x20, 0x05, 0xC5, 0x8E, 0xF1, 0x83, 0x7D, 0x16, 0x83, 0xB2, 0xC6, 0xF3, 0x4A, 0x26, 0xC1, 0xB2, 0xEF, 0xFA, 0x88, 0x6B, 0x42, 0x38, 0x61, 0x28, 0x5C, 0x97, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; static unsigned char dhg_2048[] = { 0x02 }; DH *dh = DH_new(); BIGNUM *p, *g; if (dh == NULL) return NULL; p = BN_bin2bn(dhp_2048, sizeof(dhp_2048), NULL); g = BN_bin2bn(dhg_2048, sizeof(dhg_2048), NULL); if (p == NULL || g == NULL || !DH_set0_pqg(dh, p, NULL, g)) { DH_free(dh); BN_free(p); BN_free(g); return NULL; } return dh; } #endif static int mod_openssl_ssl_conf_curves(server *srv, plugin_config_socket *s, const buffer *ssl_ec_curve) { #if OPENSSL_VERSION_NUMBER >= 0x0090800fL #ifndef OPENSSL_NO_ECDH int nid = 0; /* Support for Elliptic-Curve Diffie-Hellman key exchange */ if (!buffer_string_is_empty(ssl_ec_curve)) { /* OpenSSL only supports the "named curves" * from RFC 4492, section 5.1.1. */ nid = OBJ_sn2nid((char *) ssl_ec_curve->ptr); if (nid == 0) { log_error(srv->errh, __FILE__, __LINE__, "SSL: Unknown curve name %s", ssl_ec_curve->ptr); return 0; } } else { #if OPENSSL_VERSION_NUMBER < 0x10002000 /* Default curve */ nid = OBJ_sn2nid("prime256v1"); #elif OPENSSL_VERSION_NUMBER < 0x10100000L \ || defined(LIBRESSL_VERSION_NUMBER) if (!SSL_CTX_set_ecdh_auto(s->ssl_ctx, 1)) { log_error(srv->errh, __FILE__, __LINE__, "SSL: SSL_CTX_set_ecdh_auto() failed"); } #endif } if (nid) { EC_KEY *ecdh; ecdh = EC_KEY_new_by_curve_name(nid); if (ecdh == NULL) { log_error(srv->errh, __FILE__, __LINE__, "SSL: Unable to create curve %s", ssl_ec_curve->ptr); return 0; } SSL_CTX_set_tmp_ecdh(s->ssl_ctx, ecdh); SSL_CTX_set_options(s->ssl_ctx, SSL_OP_SINGLE_ECDH_USE); EC_KEY_free(ecdh); } #endif #endif UNUSED(srv); UNUSED(s); UNUSED(ssl_ec_curve); return 1; } static int network_init_ssl (server *srv, plugin_config_socket *s, plugin_data *p) { /* load SSL certificates */ #ifndef SSL_OP_NO_COMPRESSION #define SSL_OP_NO_COMPRESSION 0 #endif #ifndef SSL_MODE_RELEASE_BUFFERS /* OpenSSL >= 1.0.0 */ #define SSL_MODE_RELEASE_BUFFERS 0 #endif long ssloptions = SSL_OP_ALL | SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION | SSL_OP_NO_COMPRESSION; #if OPENSSL_VERSION_NUMBER >= 0x10100000L \ || defined(WOLFSSL_VERSION) s->ssl_ctx = (!s->ssl_use_sslv2 && !s->ssl_use_sslv3) ? SSL_CTX_new(TLS_server_method()) : SSL_CTX_new(SSLv23_server_method()); #else s->ssl_ctx = SSL_CTX_new(SSLv23_server_method()); #endif if (NULL == s->ssl_ctx) { log_error(srv->errh, __FILE__, __LINE__, "SSL: %s", ERR_error_string(ERR_get_error(), NULL)); return -1; } #ifdef SSL_OP_NO_RENEGOTIATION /* openssl 1.1.0 */ if (s->ssl_disable_client_renegotiation) ssloptions |= SSL_OP_NO_RENEGOTIATION; #endif /* completely useless identifier; * required for client cert verification to work with sessions */ if (0 == SSL_CTX_set_session_id_context( s->ssl_ctx,(const unsigned char*)CONST_STR_LEN("lighttpd"))){ log_error(srv->errh, __FILE__, __LINE__, "SSL: failed to set session context: %s", ERR_error_string(ERR_get_error(), NULL)); return -1; } #if !defined(WOLFSSL_VERSION) || !defined(NO_SESSION_CACHE) /* disable session cache; session tickets are preferred */ SSL_CTX_set_session_cache_mode(s->ssl_ctx, SSL_SESS_CACHE_OFF | SSL_SESS_CACHE_NO_AUTO_CLEAR | SSL_SESS_CACHE_NO_INTERNAL); #endif if (s->ssl_empty_fragments) { #ifdef SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS ssloptions &= ~SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS; #else ssloptions &= ~0x00000800L; /* hardcode constant */ log_error(srv->errh, __FILE__, __LINE__, "WARNING: SSL: 'insert empty fragments' not supported by the " "openssl version used to compile lighttpd with"); #endif } SSL_CTX_set_options(s->ssl_ctx, ssloptions); SSL_CTX_set_info_callback(s->ssl_ctx, ssl_info_callback); #ifndef HAVE_WOLFSSL_SSL_H /*(wolfSSL does not support SSLv2)*/ if (!s->ssl_use_sslv2 && 0 != SSL_OP_NO_SSLv2) { /* disable SSLv2 */ if ((SSL_OP_NO_SSLv2 & SSL_CTX_set_options(s->ssl_ctx, SSL_OP_NO_SSLv2)) != SSL_OP_NO_SSLv2) { log_error(srv->errh, __FILE__, __LINE__, "SSL: %s", ERR_error_string(ERR_get_error(), NULL)); return -1; } } #endif if (!s->ssl_use_sslv3 && 0 != SSL_OP_NO_SSLv3) { /* disable SSLv3 */ if ((SSL_OP_NO_SSLv3 & SSL_CTX_set_options(s->ssl_ctx, SSL_OP_NO_SSLv3)) != SSL_OP_NO_SSLv3) { log_error(srv->errh, __FILE__, __LINE__, "SSL: %s", ERR_error_string(ERR_get_error(), NULL)); return -1; } } if (!buffer_string_is_empty(s->ssl_cipher_list)) { /* Disable support for low encryption ciphers */ if (SSL_CTX_set_cipher_list(s->ssl_ctx,s->ssl_cipher_list->ptr)!=1){ log_error(srv->errh, __FILE__, __LINE__, "SSL: %s", ERR_error_string(ERR_get_error(), NULL)); return -1; } if (s->ssl_honor_cipher_order) { SSL_CTX_set_options(s->ssl_ctx,SSL_OP_CIPHER_SERVER_PREFERENCE); } } #ifdef SSL_OP_PRIORITIZE_CHACHA /*(openssl 1.1.1)*/ if (s->ssl_honor_cipher_order) SSL_CTX_set_options(s->ssl_ctx, SSL_OP_PRIORITIZE_CHACHA); #endif #ifndef OPENSSL_NO_DH { DH *dh; /* Support for Diffie-Hellman key exchange */ #ifdef WOLFSSL_VERSION if (!buffer_string_is_empty(s->ssl_dh_file)) { const char *fn = s->ssl_dh_file->ptr; off_t dlen = 1*1024*1024;/*(arbitrary limit: 1 MB; expect < 1 KB)*/ char *data = fdevent_load_file(fn, &dlen, srv->errh, malloc, free); int rc = (NULL != data) ? 0 : -1; if (0 == rc) wolfSSL_CTX_SetTmpDH_buffer(s->ssl_ctx, (unsigned char *)data, (long)dlen, WOLFSSL_FILETYPE_PEM); if (dlen) safe_memclear(data, dlen); free(data); if (rc < 0) { log_error(srv->errh, __FILE__, __LINE__, "SSL: Unable to read DH params from file %s", s->ssl_dh_file->ptr); return -1; } } #else if (!buffer_string_is_empty(s->ssl_dh_file)) { /* DH parameters from file */ BIO *bio; bio = BIO_new_file((char *) s->ssl_dh_file->ptr, "r"); if (bio == NULL) { log_error(srv->errh, __FILE__, __LINE__, "SSL: Unable to open file %s", s->ssl_dh_file->ptr); return -1; } dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL); BIO_free(bio); if (dh == NULL) { log_error(srv->errh, __FILE__, __LINE__, "SSL: PEM_read_bio_DHparams failed %s", s->ssl_dh_file->ptr); return -1; } SSL_CTX_set_tmp_dh(s->ssl_ctx,dh); DH_free(dh); } #endif else { dh = get_dh2048(); if (dh == NULL) { log_error(srv->errh, __FILE__, __LINE__, "SSL: get_dh2048() failed"); return -1; } SSL_CTX_set_tmp_dh(s->ssl_ctx,dh); DH_free(dh); } SSL_CTX_set_options(s->ssl_ctx,SSL_OP_SINGLE_DH_USE); } #else if (!buffer_string_is_empty(s->ssl_dh_file)) { log_error(srv->errh, __FILE__, __LINE__, "SSL: openssl compiled without DH support, " "can't load parameters from %s", s->ssl_dh_file->ptr); } #endif if (!mod_openssl_ssl_conf_curves(srv, s, s->ssl_ec_curve)) return -1; #ifdef TLSEXT_TYPE_session_ticket SSL_CTX_set_tlsext_ticket_key_cb(s->ssl_ctx, ssl_tlsext_ticket_key_cb); #endif #ifndef OPENSSL_NO_OCSP #ifndef BORINGSSL_API_VERSION /* BoringSSL suggests using different API */ SSL_CTX_set_tlsext_status_cb(s->ssl_ctx, ssl_tlsext_status_cb); #endif #endif #if OPENSSL_VERSION_NUMBER >= 0x10002000 \ && !defined(LIBRESSL_VERSION_NUMBER) SSL_CTX_set_cert_cb(s->ssl_ctx, mod_openssl_cert_cb, NULL); UNUSED(p); #if defined(BORINGSSL_API_VERSION) /* BoringSSL limitation */ /* set cert store for auto-chaining * BoringSSL does not support SSL_set1_chain_cert_store() in cert_cb */ if (s->ssl_ca_file && s->ssl_ca_file->certs) { if (!X509_STORE_up_ref(s->ssl_ca_file->certs)) return -1; SSL_CTX_set_cert_store(s->ssl_ctx, s->ssl_ca_file->certs); } #endif #else /* OPENSSL_VERSION_NUMBER < 0x10002000 */ /* load all ssl.ca-files specified in the config into each SSL_CTX * XXX: This might be a bit excessive, but are all trusted CAs * TODO: prefer to load on-demand in mod_openssl_cert_cb() * for openssl >= 1.0.2 */ #ifdef WOLFSSL_VERSION if (!mod_wolfssl_load_ca_files(s->ssl_ctx, p, srv)) #else if (!mod_openssl_load_ca_files(s->ssl_ctx, p, srv)) #endif return -1; if (s->ssl_verifyclient) { if (NULL == s->ssl_ca_file) { log_error(srv->errh, __FILE__, __LINE__, "SSL: You specified ssl.verifyclient.activate " "but no ssl.ca-file"); return -1; } /* WTH openssl? SSL_CTX_set_client_CA_list() calls set0_CA_list(), * but there is no set1_CA_list() to simply up the reference count * (without needing to duplicate the list) */ /* WTH wolfssl? wolfSSL_dup_CA_list() is a stub which returns NULL * and so DN names in cert request are not set here. * (A patch has been submitted to WolfSSL to correct this)*/ STACK_OF(X509_NAME) * const cert_names = s->ssl_ca_dn_file ? s->ssl_ca_dn_file : s->ssl_ca_file->names; SSL_CTX_set_client_CA_list(s->ssl_ctx, SSL_dup_CA_list(cert_names)); int mode = SSL_VERIFY_PEER; if (s->ssl_verifyclient_enforce) { mode |= SSL_VERIFY_FAIL_IF_NO_PEER_CERT; } #ifdef WOLFSSL_VERSION wolfSSL_CTX_set_verify(s->ssl_ctx, mode, verify_callback); wolfSSL_CTX_set_verify_depth(s->ssl_ctx, s->ssl_verifyclient_depth + 1); if (!buffer_string_is_empty(s->ssl_ca_crl_file)) { if (!mod_wolfssl_load_cacrls(s->ssl_ctx,s->ssl_ca_crl_file,srv)) return -1; } #else SSL_CTX_set_verify(s->ssl_ctx, mode, verify_callback); SSL_CTX_set_verify_depth(s->ssl_ctx, s->ssl_verifyclient_depth + 1); if (!buffer_string_is_empty(s->ssl_ca_crl_file)) { X509_STORE *store = SSL_CTX_get_cert_store(s->ssl_ctx); if (!mod_openssl_load_cacrls(store, s->ssl_ca_crl_file, srv)) return -1; } #endif } #ifdef WOLFSSL_VERSION if (1 != mod_wolfssl_CTX_use_certificate_chain_file( s->ssl_ctx, s->pc->ssl_pemfile->ptr, srv->errh)) return -1; #else if (1 != SSL_CTX_use_certificate_chain_file(s->ssl_ctx, s->pc->ssl_pemfile->ptr)) { log_error(srv->errh, __FILE__, __LINE__, "SSL: %s %s", ERR_error_string(ERR_get_error(), NULL), s->pc->ssl_pemfile->ptr); return -1; } #endif #ifdef WOLFSSL_VERSION buffer *k = s->pc->ssl_pemfile_pkey; if (1 != wolfSSL_CTX_use_PrivateKey_buffer(s->ssl_ctx, (unsigned char *)k->ptr, (int)buffer_string_length(k), WOLFSSL_FILETYPE_ASN1)) #else if (1 != SSL_CTX_use_PrivateKey(s->ssl_ctx, s->pc->ssl_pemfile_pkey)) #endif { log_error(srv->errh, __FILE__, __LINE__, "SSL: %s %s %s", ERR_error_string(ERR_get_error(), NULL), s->pc->ssl_pemfile->ptr, s->pc->ssl_privkey->ptr); return -1; } if (SSL_CTX_check_private_key(s->ssl_ctx) != 1) { log_error(srv->errh, __FILE__, __LINE__, "SSL: Private key does not match the certificate public key, " "reason: %s %s %s", ERR_error_string(ERR_get_error(), NULL), s->pc->ssl_pemfile->ptr, s->pc->ssl_privkey->ptr); return -1; } #endif /* OPENSSL_VERSION_NUMBER < 0x10002000 */ #if defined(BORINGSSL_API_VERSION) #define SSL_CTX_set_default_read_ahead(ctx,m) \ SSL_CTX_set_read_ahead(ctx,m) #endif SSL_CTX_set_default_read_ahead(s->ssl_ctx, s->ssl_read_ahead); SSL_CTX_set_mode(s->ssl_ctx, SSL_CTX_get_mode(s->ssl_ctx) | SSL_MODE_ENABLE_PARTIAL_WRITE | SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER | SSL_MODE_RELEASE_BUFFERS); #ifndef OPENSSL_NO_TLSEXT #ifdef SSL_CLIENT_HELLO_SUCCESS SSL_CTX_set_client_hello_cb(s->ssl_ctx,mod_openssl_client_hello_cb,srv); #elif defined(WOLFSSL_VERSION) wolfSSL_CTX_set_servername_callback( s->ssl_ctx, network_ssl_servername_callback); wolfSSL_CTX_set_servername_arg(s->ssl_ctx, srv); #else if (!SSL_CTX_set_tlsext_servername_callback( s->ssl_ctx, network_ssl_servername_callback) || !SSL_CTX_set_tlsext_servername_arg(s->ssl_ctx, srv)) { log_error(srv->errh, __FILE__, __LINE__, "SSL: failed to initialize TLS servername callback, " "openssl library does not support TLS servername extension"); return -1; } #endif #ifdef TLSEXT_TYPE_application_layer_protocol_negotiation SSL_CTX_set_alpn_select_cb(s->ssl_ctx,mod_openssl_alpn_select_cb,NULL); #endif #endif #if OPENSSL_VERSION_NUMBER >= 0x10100000L \ || defined(BORINGSSL_API_VERSION) \ || defined(LIBRESSL_VERSION_NUMBER) if (!s->ssl_use_sslv3 && !s->ssl_use_sslv2 && !SSL_CTX_set_min_proto_version(s->ssl_ctx, TLS1_2_VERSION)) return -1; #elif defined(WOLFSSL_VERSION) if (!s->ssl_use_sslv3 && !s->ssl_use_sslv2 && wolfSSL_CTX_SetMinVersion(s->ssl_ctx, WOLFSSL_TLSV1_2) != WOLFSSL_SUCCESS) return -1; #endif if (s->ssl_conf_cmd && s->ssl_conf_cmd->used) { if (0 != network_openssl_ssl_conf_cmd(srv, s)) return -1; } return 0; } static int mod_openssl_set_defaults_sockets(server *srv, plugin_data *p) { static const config_plugin_keys_t cpk[] = { { CONST_STR_LEN("ssl.engine"), T_CONFIG_BOOL, T_CONFIG_SCOPE_CONNECTION } ,{ CONST_STR_LEN("ssl.cipher-list"), T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION } ,{ CONST_STR_LEN("ssl.honor-cipher-order"), T_CONFIG_BOOL, T_CONFIG_SCOPE_CONNECTION } ,{ CONST_STR_LEN("ssl.dh-file"), T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION } ,{ CONST_STR_LEN("ssl.ec-curve"), T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION } ,{ CONST_STR_LEN("ssl.openssl.ssl-conf-cmd"), T_CONFIG_ARRAY_KVSTRING, T_CONFIG_SCOPE_CONNECTION } ,{ CONST_STR_LEN("ssl.pemfile"), /* included to process global scope */ T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION } ,{ CONST_STR_LEN("ssl.empty-fragments"), T_CONFIG_BOOL, T_CONFIG_SCOPE_CONNECTION } ,{ CONST_STR_LEN("ssl.use-sslv2"), T_CONFIG_BOOL, T_CONFIG_SCOPE_CONNECTION } ,{ CONST_STR_LEN("ssl.use-sslv3"), T_CONFIG_BOOL, T_CONFIG_SCOPE_CONNECTION } ,{ CONST_STR_LEN("ssl.stek-file"), T_CONFIG_STRING, T_CONFIG_SCOPE_SERVER } ,{ NULL, 0, T_CONFIG_UNSET, T_CONFIG_SCOPE_UNSET } }; #ifdef WOLFSSL_VERSION /* WolfSSL does not have mapping for "HIGH" */ /* cipher list is (current) output of "openssl ciphers HIGH" */ static const buffer default_ssl_cipher_list = { CONST_STR_LEN("TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256:TLS_AES_128_GCM_SHA256:TLS_AES_128_CCM_SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:DHE-DSS-AES256-GCM-SHA384:DHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES256-CCM8:ECDHE-ECDSA-AES256-CCM:DHE-RSA-AES256-CCM8:DHE-RSA-AES256-CCM:ECDHE-ECDSA-ARIA256-GCM-SHA384:ECDHE-ARIA256-GCM-SHA384:DHE-DSS-ARIA256-GCM-SHA384:DHE-RSA-ARIA256-GCM-SHA384:ADH-AES256-GCM-SHA384:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:DHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-CCM8:ECDHE-ECDSA-AES128-CCM:DHE-RSA-AES128-CCM8:DHE-RSA-AES128-CCM:ECDHE-ECDSA-ARIA128-GCM-SHA256:ECDHE-ARIA128-GCM-SHA256:DHE-DSS-ARIA128-GCM-SHA256:DHE-RSA-ARIA128-GCM-SHA256:ADH-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA384:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA256:ECDHE-ECDSA-CAMELLIA256-SHA384:ECDHE-RSA-CAMELLIA256-SHA384:DHE-RSA-CAMELLIA256-SHA256:DHE-DSS-CAMELLIA256-SHA256:ADH-AES256-SHA256:ADH-CAMELLIA256-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA256:DHE-DSS-AES128-SHA256:ECDHE-ECDSA-CAMELLIA128-SHA256:ECDHE-RSA-CAMELLIA128-SHA256:DHE-RSA-CAMELLIA128-SHA256:DHE-DSS-CAMELLIA128-SHA256:ADH-AES128-SHA256:ADH-CAMELLIA128-SHA256:ECDHE-ECDSA-AES256-SHA:ECDHE-RSA-AES256-SHA:DHE-RSA-AES256-SHA:DHE-DSS-AES256-SHA:DHE-RSA-CAMELLIA256-SHA:DHE-DSS-CAMELLIA256-SHA:AECDH-AES256-SHA:ADH-AES256-SHA:ADH-CAMELLIA256-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES128-SHA:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA:DHE-RSA-CAMELLIA128-SHA:DHE-DSS-CAMELLIA128-SHA:AECDH-AES128-SHA:ADH-AES128-SHA:ADH-CAMELLIA128-SHA:RSA-PSK-AES256-GCM-SHA384:DHE-PSK-AES256-GCM-SHA384:RSA-PSK-CHACHA20-POLY1305:DHE-PSK-CHACHA20-POLY1305:ECDHE-PSK-CHACHA20-POLY1305:DHE-PSK-AES256-CCM8:DHE-PSK-AES256-CCM:RSA-PSK-ARIA256-GCM-SHA384:DHE-PSK-ARIA256-GCM-SHA384:AES256-GCM-SHA384:AES256-CCM8:AES256-CCM:ARIA256-GCM-SHA384:PSK-AES256-GCM-SHA384:PSK-CHACHA20-POLY1305:PSK-AES256-CCM8:PSK-AES256-CCM:PSK-ARIA256-GCM-SHA384:RSA-PSK-AES128-GCM-SHA256:DHE-PSK-AES128-GCM-SHA256:DHE-PSK-AES128-CCM8:DHE-PSK-AES128-CCM:RSA-PSK-ARIA128-GCM-SHA256:DHE-PSK-ARIA128-GCM-SHA256:AES128-GCM-SHA256:AES128-CCM8:AES128-CCM:ARIA128-GCM-SHA256:PSK-AES128-GCM-SHA256:PSK-AES128-CCM8:PSK-AES128-CCM:PSK-ARIA128-GCM-SHA256:AES256-SHA256:CAMELLIA256-SHA256:AES128-SHA256:CAMELLIA128-SHA256:ECDHE-PSK-AES256-CBC-SHA384:ECDHE-PSK-AES256-CBC-SHA:SRP-DSS-AES-256-CBC-SHA:SRP-RSA-AES-256-CBC-SHA:SRP-AES-256-CBC-SHA:RSA-PSK-AES256-CBC-SHA384:DHE-PSK-AES256-CBC-SHA384:RSA-PSK-AES256-CBC-SHA:DHE-PSK-AES256-CBC-SHA:ECDHE-PSK-CAMELLIA256-SHA384:RSA-PSK-CAMELLIA256-SHA384:DHE-PSK-CAMELLIA256-SHA384:AES256-SHA:CAMELLIA256-SHA:PSK-AES256-CBC-SHA384:PSK-AES256-CBC-SHA:PSK-CAMELLIA256-SHA384:ECDHE-PSK-AES128-CBC-SHA256:ECDHE-PSK-AES128-CBC-SHA:SRP-DSS-AES-128-CBC-SHA:SRP-RSA-AES-128-CBC-SHA:SRP-AES-128-CBC-SHA:RSA-PSK-AES128-CBC-SHA256:DHE-PSK-AES128-CBC-SHA256:RSA-PSK-AES128-CBC-SHA:DHE-PSK-AES128-CBC-SHA:ECDHE-PSK-CAMELLIA128-SHA256:RSA-PSK-CAMELLIA128-SHA256:DHE-PSK-CAMELLIA128-SHA256:AES128-SHA:CAMELLIA128-SHA:PSK-AES128-CBC-SHA256:PSK-AES128-CBC-SHA:PSK-CAMELLIA128-SHA256"), 0 }; #else static const buffer default_ssl_cipher_list = { CONST_STR_LEN("HIGH"), 0 }; #endif p->ssl_ctxs = calloc(srv->config_context->used, sizeof(plugin_ssl_ctx)); force_assert(p->ssl_ctxs); int rc = HANDLER_GO_ON; plugin_data_base srvplug; memset(&srvplug, 0, sizeof(srvplug)); plugin_data_base * const ps = &srvplug; if (!config_plugin_values_init(srv, ps, cpk, "mod_openssl")) return HANDLER_ERROR; plugin_config_socket defaults; memset(&defaults, 0, sizeof(defaults)); defaults.ssl_honor_cipher_order = 1; defaults.ssl_cipher_list = &default_ssl_cipher_list; /* process and validate config directives for global and $SERVER["socket"] * (init i to 0 if global context; to 1 to skip empty global context) */ for (int i = !ps->cvlist[0].v.u2[1]; i < ps->nconfig; ++i) { config_cond_info cfginfo; config_get_config_cond_info(&cfginfo, (uint32_t)ps->cvlist[i].k_id); int is_socket_scope = (0 == i || cfginfo.comp == COMP_SERVER_SOCKET); int count_not_engine = 0; plugin_config_socket conf; memcpy(&conf, &defaults, sizeof(conf)); /*(preserve prior behavior; not inherited)*/ /*(forcing inheritance might break existing configs where SSL is enabled * by default in the global scope, but not $SERVER["socket"]=="*:80") */ conf.ssl_enabled = 0; config_plugin_value_t *cpv = ps->cvlist + ps->cvlist[i].v.u2[0]; for (; -1 != cpv->k_id; ++cpv) { /* ignore ssl.pemfile (k_id=6); included to process global scope */ if (!is_socket_scope && cpv->k_id != 6) { log_error(srv->errh, __FILE__, __LINE__, "%s is valid only in global scope or " "$SERVER[\"socket\"] condition", cpk[cpv->k_id].k); continue; } ++count_not_engine; switch (cpv->k_id) { case 0: /* ssl.engine */ conf.ssl_enabled = (0 != cpv->v.u); --count_not_engine; break; case 1: /* ssl.cipher-list */ conf.ssl_cipher_list = cpv->v.b; break; case 2: /* ssl.honor-cipher-order */ conf.ssl_honor_cipher_order = (0 != cpv->v.u); break; case 3: /* ssl.dh-file */ conf.ssl_dh_file = cpv->v.b; break; case 4: /* ssl.ec-curve */ conf.ssl_ec_curve = cpv->v.b; break; case 5: /* ssl.openssl.ssl-conf-cmd */ *(const array **)&conf.ssl_conf_cmd = cpv->v.a; break; case 6: /* ssl.pemfile */ /* ignore here; included to process global scope when * ssl.pemfile is set, but ssl.engine is not "enable" */ break; case 7: /* ssl.empty-fragments */ conf.ssl_empty_fragments = (0 != cpv->v.u); log_error(srv->errh, __FILE__, __LINE__, "SSL: " "ssl.empty-fragments is deprecated and will soon be " "removed. It is disabled by default."); if (conf.ssl_empty_fragments) log_error(srv->errh, __FILE__, __LINE__, "SSL: " "If needed, use: ssl.openssl.ssl-conf-cmd = " "(\"Options\" => \"EmptyFragments\")"); log_error(srv->errh, __FILE__, __LINE__, "SSL: " "ssl.empty-fragments is a " "counter-measure against a SSL 3.0/TLS 1.0 protocol " "vulnerability affecting CBC ciphers, which cannot be handled" " by some broken (Microsoft) SSL implementations."); break; case 8: /* ssl.use-sslv2 */ conf.ssl_use_sslv2 = (0 != cpv->v.u); log_error(srv->errh, __FILE__, __LINE__, "SSL: " "ssl.use-sslv2 is deprecated and will soon be removed. " "It is disabled by default. " "Many modern TLS libraries no longer support SSLv2."); break; case 9: /* ssl.use-sslv3 */ conf.ssl_use_sslv3 = (0 != cpv->v.u); log_error(srv->errh, __FILE__, __LINE__, "SSL: " "ssl.use-sslv3 is deprecated and will soon be removed. " "It is disabled by default. " "Many modern TLS libraries no longer support SSLv3."); if (conf.ssl_use_sslv3) log_error(srv->errh, __FILE__, __LINE__, "SSL: " "If needed, use: ssl.openssl.ssl-conf-cmd = " "(\"MinProtocol\" => \"SSLv3\")"); break; case 10:/* ssl.stek-file */ if (!buffer_is_empty(cpv->v.b)) p->ssl_stek_file = cpv->v.b->ptr; break; default:/* should not happen */ break; } } if (HANDLER_GO_ON != rc) break; if (0 == i) memcpy(&defaults, &conf, sizeof(conf)); if (0 != i && !conf.ssl_enabled) continue; /* fill plugin_config_socket with global context then $SERVER["socket"] * only for directives directly in current $SERVER["socket"] condition*/ /*conf.pc = p->defaults.pc;*/ conf.ssl_ca_file = p->defaults.ssl_ca_file; conf.ssl_ca_dn_file = p->defaults.ssl_ca_dn_file; conf.ssl_ca_crl_file = p->defaults.ssl_ca_crl_file; conf.ssl_verifyclient = p->defaults.ssl_verifyclient; conf.ssl_verifyclient_enforce = p->defaults.ssl_verifyclient_enforce; conf.ssl_verifyclient_depth = p->defaults.ssl_verifyclient_depth; conf.ssl_read_ahead = p->defaults.ssl_read_ahead; int sidx = ps->cvlist[i].k_id; for (int j = !p->cvlist[0].v.u2[1]; j < p->nconfig; ++j) { if (p->cvlist[j].k_id != sidx) continue; /*if (0 == sidx) break;*//*(repeat to get ssl_pemfile,ssl_privkey)*/ cpv = p->cvlist + p->cvlist[j].v.u2[0]; for (; -1 != cpv->k_id; ++cpv) { ++count_not_engine; switch (cpv->k_id) { case 0: /* ssl.pemfile */ if (cpv->vtype == T_CONFIG_LOCAL) conf.pc = cpv->v.v; break; case 2: /* ssl.ca-file */ if (cpv->vtype == T_CONFIG_LOCAL) conf.ssl_ca_file = cpv->v.v; break; case 3: /* ssl.ca-dn-file */ if (cpv->vtype == T_CONFIG_LOCAL) conf.ssl_ca_dn_file = cpv->v.v; break; case 4: /* ssl.ca-crl-file */ conf.ssl_ca_crl_file = cpv->v.b; break; case 5: /* ssl.read-ahead */ conf.ssl_read_ahead = (0 != cpv->v.u); break; case 6: /* ssl.disable-client-renegotiation */ conf.ssl_disable_client_renegotiation = (0 != cpv->v.u); break; case 7: /* ssl.verifyclient.activate */ conf.ssl_verifyclient = (0 != cpv->v.u); break; case 8: /* ssl.verifyclient.enforce */ conf.ssl_verifyclient_enforce = (0 != cpv->v.u); break; case 9: /* ssl.verifyclient.depth */ conf.ssl_verifyclient_depth = (unsigned char)cpv->v.shrt; break; default: break; } } break; } if (NULL == conf.pc) { if (0 == i && !conf.ssl_enabled) continue; if (0 != i) { /* inherit ssl settings from global scope * (if only ssl.engine = "enable" and no other ssl.* settings) * (This is for convenience when defining both IPv4 and IPv6 * and desiring to inherit the ssl config from global context * without having to duplicate the directives)*/ if (count_not_engine) { log_error(srv->errh, __FILE__, __LINE__, "ssl.pemfile has to be set in same $SERVER[\"socket\"] scope " "as other ssl.* directives, unless only ssl.engine is set, " "inheriting ssl.* from global scope"); rc = HANDLER_ERROR; continue; } plugin_ssl_ctx * const s = p->ssl_ctxs + sidx; *s = *p->ssl_ctxs;/*(copy struct of ssl_ctx from global scope)*/ continue; } /* PEM file is required */ log_error(srv->errh, __FILE__, __LINE__, "ssl.pemfile has to be set when ssl.engine = \"enable\""); rc = HANDLER_ERROR; continue; } /* configure ssl_ctx for socket */ /*conf.ssl_ctx = NULL;*//*(filled by network_init_ssl() even on error)*/ if (0 == network_init_ssl(srv, &conf, p)) { plugin_ssl_ctx * const s = p->ssl_ctxs + sidx; s->ssl_ctx = conf.ssl_ctx; } else { SSL_CTX_free(conf.ssl_ctx); rc = HANDLER_ERROR; } } #ifdef TLSEXT_TYPE_session_ticket if (rc == HANDLER_GO_ON && ssl_is_init) mod_openssl_session_ticket_key_check(p, log_epoch_secs); #endif free(srvplug.cvlist); return rc; } SETDEFAULTS_FUNC(mod_openssl_set_defaults) { static const config_plugin_keys_t cpk[] = { { CONST_STR_LEN("ssl.pemfile"), T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION } ,{ CONST_STR_LEN("ssl.privkey"), T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION } ,{ CONST_STR_LEN("ssl.ca-file"), T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION } ,{ CONST_STR_LEN("ssl.ca-dn-file"), T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION } ,{ CONST_STR_LEN("ssl.ca-crl-file"), T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION } ,{ CONST_STR_LEN("ssl.read-ahead"), T_CONFIG_BOOL, T_CONFIG_SCOPE_CONNECTION } ,{ CONST_STR_LEN("ssl.disable-client-renegotiation"), T_CONFIG_BOOL, T_CONFIG_SCOPE_CONNECTION } ,{ CONST_STR_LEN("ssl.verifyclient.activate"), T_CONFIG_BOOL, T_CONFIG_SCOPE_CONNECTION } ,{ CONST_STR_LEN("ssl.verifyclient.enforce"), T_CONFIG_BOOL, T_CONFIG_SCOPE_CONNECTION } ,{ CONST_STR_LEN("ssl.verifyclient.depth"), T_CONFIG_SHORT, T_CONFIG_SCOPE_CONNECTION } ,{ CONST_STR_LEN("ssl.verifyclient.username"), T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION } ,{ CONST_STR_LEN("ssl.verifyclient.exportcert"), T_CONFIG_BOOL, T_CONFIG_SCOPE_CONNECTION } ,{ CONST_STR_LEN("ssl.acme-tls-1"), T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION } ,{ CONST_STR_LEN("ssl.stapling-file"), T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION } ,{ CONST_STR_LEN("debug.log-ssl-noise"), T_CONFIG_BOOL, T_CONFIG_SCOPE_CONNECTION } ,{ NULL, 0, T_CONFIG_UNSET, T_CONFIG_SCOPE_UNSET } }; plugin_data * const p = p_d; p->srv = srv; p->cafiles = array_init(0); if (!config_plugin_values_init(srv, p, cpk, "mod_openssl")) return HANDLER_ERROR; const buffer *default_ssl_ca_crl_file = NULL; /* process and validate config directives * (init i to 0 if global context; to 1 to skip empty global context) */ for (int i = !p->cvlist[0].v.u2[1]; i < p->nconfig; ++i) { config_plugin_value_t *cpv = p->cvlist + p->cvlist[i].v.u2[0]; config_plugin_value_t *pemfile = NULL; config_plugin_value_t *privkey = NULL; const buffer *ssl_stapling_file = NULL; const buffer *ssl_ca_file = NULL; const buffer *ssl_ca_dn_file = NULL; const buffer *ssl_ca_crl_file = NULL; X509_STORE *ca_store = NULL; for (; -1 != cpv->k_id; ++cpv) { switch (cpv->k_id) { case 0: /* ssl.pemfile */ if (!buffer_string_is_empty(cpv->v.b)) pemfile = cpv; break; case 1: /* ssl.privkey */ if (!buffer_string_is_empty(cpv->v.b)) privkey = cpv; break; case 2: /* ssl.ca-file */ if (buffer_string_is_empty(cpv->v.b)) break; if (!mod_openssl_init_once_openssl(srv)) return HANDLER_ERROR; ssl_ca_file = cpv->v.b; #ifdef WOLFSSL_VERSION cpv->v.v = mod_wolfssl_load_cacerts(ssl_ca_file, srv->errh); #else cpv->v.v = mod_openssl_load_cacerts(ssl_ca_file, srv->errh); #endif if (NULL != cpv->v.v) { cpv->vtype = T_CONFIG_LOCAL; ca_store = ((plugin_cacerts *)cpv->v.v)->certs; } else { log_error(srv->errh, __FILE__, __LINE__, "SSL: %s %s", ERR_error_string(ERR_get_error(), NULL), ssl_ca_file->ptr); return HANDLER_ERROR; } break; case 3: /* ssl.ca-dn-file */ if (buffer_string_is_empty(cpv->v.b)) break; if (!mod_openssl_init_once_openssl(srv)) return HANDLER_ERROR; ssl_ca_dn_file = cpv->v.b; #ifdef WOLFSSL_VERSION cpv->v.v = mod_wolfssl_load_client_CA_file(ssl_ca_dn_file, srv->errh); #else cpv->v.v = SSL_load_client_CA_file(ssl_ca_dn_file->ptr); #endif if (NULL != cpv->v.v) { cpv->vtype = T_CONFIG_LOCAL; } else { log_error(srv->errh, __FILE__, __LINE__, "SSL: %s %s", ERR_error_string(ERR_get_error(), NULL), ssl_ca_dn_file->ptr); return HANDLER_ERROR; } break; case 4: /* ssl.ca-crl-file */ if (buffer_string_is_empty(cpv->v.b)) break; ssl_ca_crl_file = cpv->v.b; if (0 == i) default_ssl_ca_crl_file = cpv->v.b; break; case 5: /* ssl.read-ahead */ case 6: /* ssl.disable-client-renegotiation */ case 7: /* ssl.verifyclient.activate */ case 8: /* ssl.verifyclient.enforce */ break; case 9: /* ssl.verifyclient.depth */ if (cpv->v.shrt > 255) { log_error(srv->errh, __FILE__, __LINE__, "%s is absurdly large (%hu); limiting to 255", cpk[cpv->k_id].k, cpv->v.shrt); cpv->v.shrt = 255; } break; case 10:/* ssl.verifyclient.username */ case 11:/* ssl.verifyclient.exportcert */ case 12:/* ssl.acme-tls-1 */ break; case 13:/* ssl.stapling-file */ ssl_stapling_file = cpv->v.b; break; case 14:/* debug.log-ssl-noise */ break; default:/* should not happen */ break; } } #if OPENSSL_VERSION_NUMBER < 0x10002000 /* p->cafiles for legacy only */ \ || defined(LIBRESSL_VERSION_NUMBER) /* load all ssl.ca-files into a single chain */ /*(certificate load order might matter)*/ if (ssl_ca_dn_file) array_insert_value(p->cafiles, CONST_BUF_LEN(ssl_ca_dn_file)); if (ssl_ca_file) array_insert_value(p->cafiles, CONST_BUF_LEN(ssl_ca_file)); UNUSED(ca_store); UNUSED(ssl_ca_crl_file); UNUSED(default_ssl_ca_crl_file); #else if (NULL == ca_store && ssl_ca_crl_file && i != 0) { log_error(srv->errh, __FILE__, __LINE__, "ssl.ca-crl-file (%s) ignored unless issued with ssl.ca-file", ssl_ca_crl_file->ptr); } else if (ca_store && (ssl_ca_crl_file || default_ssl_ca_crl_file)) { /* prior behavior in lighttpd allowed ssl.ca-crl-file only in global * scope or $SERVER["socket"], so this inheritence from global scope * is reasonable. This code does not implement inheritance of * ssl.ca-crl-file from $SERVER["socket"] into nested $HTTP["host"], * but the solution is to repeat ssl.ca-crl-file where ssl.ca-file * is issued (and to not unnecessarily repeat ssl.ca-file) * Alternative: write code to load ssl.ca-crl-file into (X509_CRL *) * using PEM_read_bio_X509_CRL() and in mod_openssl_cert_cb(), * create a new (X509_STORE *) which merges with CA (X509_STORE *) * using X509_STORE_add_cert() and X509_STORE_add_crl(), and keeps * the result in our (plugin_cert *) for reuse */ if (NULL == ssl_ca_crl_file) ssl_ca_crl_file = default_ssl_ca_crl_file; if (!mod_openssl_load_cacrls(ca_store, ssl_ca_crl_file, srv)) return HANDLER_ERROR; } #endif if (pemfile) { #ifdef OPENSSL_NO_TLSEXT config_cond_info cfginfo; uint32_t j = (uint32_t)p->cvlist[i].k_id; config_get_config_cond_info(&cfginfo, j); if (j > 0 && (COMP_SERVER_SOCKET != cfginfo.comp || cfginfo.cond != CONFIG_COND_EQ)) { if (COMP_HTTP_HOST == cfginfo.comp) log_error(srv->errh, __FILE__, __LINE__, "SSL:" "can't use ssl.pemfile with $HTTP[\"host\"], " "as openssl version does not support TLS extensions"); else log_error(srv->errh, __FILE__, __LINE__, "SSL:" "ssl.pemfile only works in SSL socket binding context " "as openssl version does not support TLS extensions"); return HANDLER_ERROR; } #endif if (NULL == privkey) privkey = pemfile; pemfile->v.v = network_openssl_load_pemfile(srv, pemfile->v.b, privkey->v.b, ssl_stapling_file); if (pemfile->v.v) pemfile->vtype = T_CONFIG_LOCAL; else return HANDLER_ERROR; } } p->defaults.ssl_verifyclient = 0; p->defaults.ssl_verifyclient_enforce = 1; p->defaults.ssl_verifyclient_depth = 9; p->defaults.ssl_verifyclient_export_cert = 0; p->defaults.ssl_disable_client_renegotiation = 1; p->defaults.ssl_read_ahead = 0; /* initialize p->defaults from global config context */ if (p->nconfig > 0 && p->cvlist->v.u2[1]) { const config_plugin_value_t *cpv = p->cvlist + p->cvlist->v.u2[0]; if (-1 != cpv->k_id) mod_openssl_merge_config(&p->defaults, cpv); } return mod_openssl_set_defaults_sockets(srv, p); } static int load_next_chunk (chunkqueue * const cq, off_t max_bytes, const char ** const data, size_t * const data_len, log_error_st * const errh) { chunk *c = cq->first; /* local_send_buffer is a static buffer of size (LOCAL_SEND_BUFSIZE) * * it has to stay at the same location all the time to satisfy the needs * of SSL_write to pass the SAME parameter in case of a _WANT_WRITE * * buffer is allocated once, is NOT realloced (note: not thread-safe) * * (Note: above restriction no longer true since SSL_CTX_set_mode() is * called with SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER) * */ force_assert(NULL != c); switch (c->type) { case MEM_CHUNK: *data = NULL; *data_len = 0; do { size_t have; force_assert(c->offset >= 0 && c->offset <= (off_t)buffer_string_length(c->mem)); have = buffer_string_length(c->mem) - c->offset; /* copy small mem chunks into single large buffer before SSL_write() * to reduce number times write() called underneath SSL_write() and * potentially reduce number of packets generated if TCP_NODELAY */ if (*data_len) { size_t space = LOCAL_SEND_BUFSIZE - *data_len; if (have > space) have = space; if (have > (size_t)max_bytes - *data_len) have = (size_t)max_bytes - *data_len; if (*data != local_send_buffer) { memcpy(local_send_buffer, *data, *data_len); *data = local_send_buffer; } memcpy(local_send_buffer+*data_len,c->mem->ptr+c->offset,have); *data_len += have; continue; } if ((off_t) have > max_bytes) have = max_bytes; *data = c->mem->ptr + c->offset; *data_len = have; } while ((c = c->next) && c->type == MEM_CHUNK && *data_len < LOCAL_SEND_BUFSIZE && (off_t) *data_len < max_bytes); return 0; case FILE_CHUNK: if (0 != chunkqueue_open_file_chunk(cq, errh)) return -1; { off_t offset, toSend; force_assert(c->offset >= 0 && c->offset <= c->file.length); offset = c->file.start + c->offset; toSend = c->file.length - c->offset; if (toSend > LOCAL_SEND_BUFSIZE) toSend = LOCAL_SEND_BUFSIZE; if (toSend > max_bytes) toSend = max_bytes; if (-1 == lseek(c->file.fd, offset, SEEK_SET)) { log_perror(errh, __FILE__, __LINE__, "lseek"); return -1; } if (-1 == (toSend = read(c->file.fd, local_send_buffer, toSend))) { log_perror(errh, __FILE__, __LINE__, "read"); return -1; } *data = local_send_buffer; *data_len = toSend; } return 0; } return -1; } static int mod_openssl_close_notify(handler_ctx *hctx); static int connection_write_cq_ssl (connection *con, chunkqueue *cq, off_t max_bytes) { handler_ctx *hctx = con->plugin_ctx[plugin_data_singleton->id]; SSL *ssl = hctx->ssl; log_error_st * const errh = hctx->errh; if (0 != hctx->close_notify) return mod_openssl_close_notify(hctx); chunkqueue_remove_finished_chunks(cq); while (max_bytes > 0 && NULL != cq->first) { const char *data; size_t data_len; int wr; if (0 != load_next_chunk(cq,max_bytes,&data,&data_len,errh)) return -1; /** * SSL_write man-page * * WARNING * When an SSL_write() operation has to be repeated because of * SSL_ERROR_WANT_READ or SSL_ERROR_WANT_WRITE, it must be * repeated with the same arguments. */ ERR_clear_error(); wr = SSL_write(ssl, data, data_len); if (hctx->renegotiations > 1 && hctx->conf.ssl_disable_client_renegotiation) { log_error(errh, __FILE__, __LINE__, "SSL: renegotiation initiated by client, killing connection"); return -1; } if (wr <= 0) { int ssl_r; unsigned long err; switch ((ssl_r = SSL_get_error(ssl, wr))) { case SSL_ERROR_WANT_READ: con->is_readable = -1; return 0; /* try again later */ case SSL_ERROR_WANT_WRITE: con->is_writable = -1; return 0; /* try again later */ case SSL_ERROR_SYSCALL: /* perhaps we have error waiting in our error-queue */ if (0 != (err = ERR_get_error())) { do { log_error(errh, __FILE__, __LINE__, "SSL: %d %d %s",ssl_r,wr,ERR_error_string(err,NULL)); } while((err = ERR_get_error())); } else if (wr == -1) { /* no, but we have errno */ switch(errno) { case EPIPE: case ECONNRESET: return -2; default: log_perror(errh, __FILE__, __LINE__, "SSL: %d %d", ssl_r, wr); break; } } else { /* neither error-queue nor errno ? */ log_perror(errh, __FILE__, __LINE__, "SSL (error): %d %d", ssl_r, wr); } break; case SSL_ERROR_ZERO_RETURN: /* clean shutdown on the remote side */ if (wr == 0) return -2; /* fall through */ default: while((err = ERR_get_error())) { log_error(errh, __FILE__, __LINE__, "SSL: %d %d %s", ssl_r, wr, ERR_error_string(err, NULL)); } break; } return -1; } chunkqueue_mark_written(cq, wr); max_bytes -= wr; if ((size_t) wr < data_len) break; /* try again later */ } return 0; } static int connection_read_cq_ssl (connection *con, chunkqueue *cq, off_t max_bytes) { handler_ctx *hctx = con->plugin_ctx[plugin_data_singleton->id]; int len; char *mem = NULL; size_t mem_len = 0; UNUSED(max_bytes); if (0 != hctx->close_notify) return mod_openssl_close_notify(hctx); ERR_clear_error(); do { len = SSL_pending(hctx->ssl); mem_len = len < 2048 ? 2048 : (size_t)len; chunk * const ckpt = cq->last; mem = chunkqueue_get_memory(cq, &mem_len); len = SSL_read(hctx->ssl, mem, mem_len); if (len > 0) { chunkqueue_use_memory(cq, ckpt, len); con->bytes_read += len; } else { chunkqueue_use_memory(cq, ckpt, 0); } if (hctx->renegotiations > 1 && hctx->conf.ssl_disable_client_renegotiation) { log_error(hctx->errh, __FILE__, __LINE__, "SSL: renegotiation initiated by client, killing connection"); return -1; } #ifdef TLSEXT_TYPE_application_layer_protocol_negotiation if (hctx->alpn) { if (hctx->alpn == MOD_OPENSSL_ALPN_ACME_TLS_1) { chunkqueue_reset(cq); /* initiate handshake in order to send ServerHello. * Once TLS handshake is complete, return -1 to result in * CON_STATE_ERROR so that socket connection is quickly closed*/ if (1 == SSL_do_handshake(hctx->ssl)) return -1; len = -1; break; } hctx->alpn = 0; } #endif } while (len > 0 && (hctx->conf.ssl_read_ahead || SSL_pending(hctx->ssl) > 0)); if (len < 0) { int oerrno = errno; int rc, ssl_err; switch ((rc = SSL_get_error(hctx->ssl, len))) { case SSL_ERROR_WANT_WRITE: con->is_writable = -1; /* fall through */ case SSL_ERROR_WANT_READ: con->is_readable = 0; /* the manual says we have to call SSL_read with the same arguments * next time. we ignore this restriction; no one has complained * about it in 1.5 yet, so it probably works anyway. */ return 0; case SSL_ERROR_SYSCALL: /** * man SSL_get_error() * * SSL_ERROR_SYSCALL * Some I/O error occurred. The OpenSSL error queue may contain * more information on the error. If the error queue is empty * (i.e. ERR_get_error() returns 0), ret can be used to find out * more about the error: If ret == 0, an EOF was observed that * violates the protocol. If ret == -1, the underlying BIO * reported an I/O error (for socket I/O on Unix systems, consult * errno for details). * */ while((ssl_err = ERR_get_error())) { /* get all errors from the error-queue */ log_error(hctx->errh, __FILE__, __LINE__, "SSL: %d %s", rc, ERR_error_string(ssl_err, NULL)); } switch(oerrno) { case ECONNRESET: if (!hctx->conf.ssl_log_noise) break; /* fall through */ default: /* (oerrno should be something like ECONNABORTED not 0 * if client disconnected before anything was sent * (e.g. TCP connection probe), but it does not appear * that openssl provides such notification, not even * something like SSL_R_SSL_HANDSHAKE_FAILURE) */ if (0==oerrno && 0==cq->bytes_in && !hctx->conf.ssl_log_noise) break; log_error(hctx->errh, __FILE__, __LINE__, "SSL: %d %d %d %s", len, rc, oerrno, strerror(oerrno)); break; } break; case SSL_ERROR_ZERO_RETURN: /* clean shutdown on the remote side */ if (rc == 0) { /* FIXME: later */ } /* fall through */ default: while((ssl_err = ERR_get_error())) { switch (ERR_GET_REASON(ssl_err)) { case SSL_R_SSL_HANDSHAKE_FAILURE: #ifdef SSL_R_UNEXPECTED_EOF_WHILE_READING case SSL_R_UNEXPECTED_EOF_WHILE_READING: #endif #ifdef SSL_R_TLSV1_ALERT_UNKNOWN_CA case SSL_R_TLSV1_ALERT_UNKNOWN_CA: #endif #ifdef SSL_R_SSLV3_ALERT_CERTIFICATE_UNKNOWN case SSL_R_SSLV3_ALERT_CERTIFICATE_UNKNOWN: #endif #ifdef SSL_R_SSLV3_ALERT_BAD_CERTIFICATE case SSL_R_SSLV3_ALERT_BAD_CERTIFICATE: #endif if (!hctx->conf.ssl_log_noise) continue; break; default: break; } /* get all errors from the error-queue */ log_error(hctx->errh, __FILE__, __LINE__, "SSL: %d %s", rc, ERR_error_string(ssl_err, NULL)); } break; } return -1; } else if (len == 0) { con->is_readable = 0; /* the other end close the connection -> KEEP-ALIVE */ return -2; } else { return 0; } } CONNECTION_FUNC(mod_openssl_handle_con_accept) { server_socket *srv_sock = con->srv_socket; if (!srv_sock->is_ssl) return HANDLER_GO_ON; plugin_data *p = p_d; handler_ctx * const hctx = handler_ctx_init(); request_st * const r = &con->request; hctx->r = r; hctx->con = con; hctx->tmp_buf = con->srv->tmp_buf; hctx->errh = r->conf.errh; con->plugin_ctx[p->id] = hctx; plugin_ssl_ctx * const s = p->ssl_ctxs + srv_sock->sidx; hctx->ssl = SSL_new(s->ssl_ctx); if (NULL != hctx->ssl && SSL_set_app_data(hctx->ssl, hctx) && SSL_set_fd(hctx->ssl, con->fd)) { SSL_set_accept_state(hctx->ssl); con->network_read = connection_read_cq_ssl; con->network_write = connection_write_cq_ssl; con->proto_default_port = 443; /* "https" */ mod_openssl_patch_config(r, &hctx->conf); return HANDLER_GO_ON; } else { log_error(r->conf.errh, __FILE__, __LINE__, "SSL: %s", ERR_error_string(ERR_get_error(), NULL)); return HANDLER_ERROR; } } static void mod_openssl_detach(handler_ctx *hctx) { /* step aside from further SSL processing * (used after handle_connection_shut_wr hook) */ /* future: might restore prior network_read and network_write fn ptrs */ hctx->con->is_ssl_sock = 0; /* if called after handle_connection_shut_wr hook, shutdown SHUT_WR */ if (-1 == hctx->close_notify) shutdown(hctx->con->fd, SHUT_WR); hctx->close_notify = 1; } CONNECTION_FUNC(mod_openssl_handle_con_shut_wr) { plugin_data *p = p_d; handler_ctx *hctx = con->plugin_ctx[p->id]; if (NULL == hctx) return HANDLER_GO_ON; hctx->close_notify = -2; if (SSL_is_init_finished(hctx->ssl)) { mod_openssl_close_notify(hctx); } else { mod_openssl_detach(hctx); } return HANDLER_GO_ON; } static int mod_openssl_close_notify(handler_ctx *hctx) { int ret, ssl_r; unsigned long err; log_error_st *errh; if (1 == hctx->close_notify) return -2; ERR_clear_error(); switch ((ret = SSL_shutdown(hctx->ssl))) { case 1: mod_openssl_detach(hctx); return -2; case 0: /* Drain SSL read buffers in case pending records need processing. * Limit to reading next record to avoid denial of service when CPU * processing TLS is slower than arrival speed of TLS data packets. * (unless hctx->conf.ssl_read_ahead is set) * * references: * * "New session ticket breaks bidirectional shutdown of TLS 1.3 connection" * https://github.com/openssl/openssl/issues/6262 * * The peer is still allowed to send data after receiving the * "close notify" event. If the peer did send data it need to be * processed by calling SSL_read() before calling SSL_shutdown() a * second time. SSL_read() will indicate the end of the peer data by * returning <= 0 and SSL_get_error() returning * SSL_ERROR_ZERO_RETURN. It is recommended to call SSL_read() * between SSL_shutdown() calls. * * Additional discussion in "Auto retry in shutdown" * https://github.com/openssl/openssl/pull/6340 */ ssl_r = SSL_pending(hctx->ssl); if (ssl_r) { do { char buf[4096]; ret = SSL_read(hctx->ssl, buf, (int)sizeof(buf)); } while (ret > 0 && (hctx->conf.ssl_read_ahead||(ssl_r-=ret))); } ERR_clear_error(); switch ((ret = SSL_shutdown(hctx->ssl))) { case 1: mod_openssl_detach(hctx); return -2; case 0: hctx->close_notify = -1; return 0; default: break; } /* fall through */ default: if (!SSL_is_init_finished(hctx->ssl)) { mod_openssl_detach(hctx); return -2; } switch ((ssl_r = SSL_get_error(hctx->ssl, ret))) { case SSL_ERROR_ZERO_RETURN: case SSL_ERROR_WANT_WRITE: case SSL_ERROR_WANT_READ: hctx->close_notify = -1; return 0; /* try again later */ case SSL_ERROR_SYSCALL: /* perhaps we have error waiting in our error-queue */ errh = hctx->r->conf.errh; if (0 != (err = ERR_get_error())) { do { log_error(errh, __FILE__, __LINE__, "SSL: %d %d %s",ssl_r,ret,ERR_error_string(err,NULL)); } while((err = ERR_get_error())); } else if (errno != 0) { /*ssl bug (see lighttpd ticket #2213): sometimes errno==0*/ switch(errno) { case EPIPE: case ECONNRESET: break; default: log_perror(errh, __FILE__, __LINE__, "SSL (error): %d %d", ssl_r, ret); break; } } break; default: errh = hctx->r->conf.errh; while((err = ERR_get_error())) { log_error(errh, __FILE__, __LINE__, "SSL: %d %d %s", ssl_r, ret, ERR_error_string(err, NULL)); } break; } } ERR_clear_error(); hctx->close_notify = -1; return ret; } CONNECTION_FUNC(mod_openssl_handle_con_close) { plugin_data *p = p_d; handler_ctx *hctx = con->plugin_ctx[p->id]; if (NULL != hctx) { con->plugin_ctx[p->id] = NULL; handler_ctx_free(hctx); } return HANDLER_GO_ON; } static void https_add_ssl_client_entries (request_st * const r, handler_ctx * const hctx) { buffer * const tb = r->tmp_buf; X509 *xs; X509_NAME *xn; int i, nentries; long vr = SSL_get_verify_result(hctx->ssl); if (vr != X509_V_OK) { char errstr[256]; ERR_error_string_n(vr, errstr, sizeof(errstr)); buffer_copy_string_len(tb, CONST_STR_LEN("FAILED:")); buffer_append_string(tb, errstr); http_header_env_set(r, CONST_STR_LEN("SSL_CLIENT_VERIFY"), CONST_BUF_LEN(tb)); return; } else if (!(xs = SSL_get_peer_certificate(hctx->ssl))) { http_header_env_set(r, CONST_STR_LEN("SSL_CLIENT_VERIFY"), CONST_STR_LEN("NONE")); return; } else { http_header_env_set(r, CONST_STR_LEN("SSL_CLIENT_VERIFY"), CONST_STR_LEN("SUCCESS")); } xn = X509_get_subject_name(xs); { char buf[256]; int len = safer_X509_NAME_oneline(xn, buf, sizeof(buf)); if (len > 0) { if (len >= (int)sizeof(buf)) len = (int)sizeof(buf)-1; http_header_env_set(r, CONST_STR_LEN("SSL_CLIENT_S_DN"), buf, (size_t)len); } } buffer_copy_string_len(tb, CONST_STR_LEN("SSL_CLIENT_S_DN_")); for (i = 0, nentries = X509_NAME_entry_count(xn); i < nentries; ++i) { int xobjnid; const char * xobjsn; X509_NAME_ENTRY *xe; if (!(xe = X509_NAME_get_entry(xn, i))) { continue; } xobjnid = OBJ_obj2nid((ASN1_OBJECT*)X509_NAME_ENTRY_get_object(xe)); xobjsn = OBJ_nid2sn(xobjnid); if (xobjsn) { buffer_string_set_length(tb, sizeof("SSL_CLIENT_S_DN_")-1); buffer_append_string(tb, xobjsn); http_header_env_set(r, CONST_BUF_LEN(tb), (const char*)X509_NAME_ENTRY_get_data(xe)->data, X509_NAME_ENTRY_get_data(xe)->length); } } { #ifdef WOLFSSL_VERSION byte buf[64]; int bsz = (int)sizeof(buf); if (wolfSSL_X509_get_serial_number(xs, buf, &bsz) == WOLFSSL_SUCCESS) { char serialHex[128+1]; li_tohex_uc(serialHex, sizeof(serialHex), (char *)buf, (size_t)bsz); http_header_env_set(r, CONST_STR_LEN("SSL_CLIENT_M_SERIAL"), serialHex, strlen(serialHex)); } #else ASN1_INTEGER *xsn = X509_get_serialNumber(xs); BIGNUM *serialBN = ASN1_INTEGER_to_BN(xsn, NULL); char *serialHex = BN_bn2hex(serialBN); http_header_env_set(r, CONST_STR_LEN("SSL_CLIENT_M_SERIAL"), serialHex, strlen(serialHex)); OPENSSL_free(serialHex); BN_free(serialBN); #endif } if (!buffer_string_is_empty(hctx->conf.ssl_verifyclient_username)) { /* pick one of the exported values as "REMOTE_USER", for example * ssl.verifyclient.username = "SSL_CLIENT_S_DN_UID" * or * ssl.verifyclient.username = "SSL_CLIENT_S_DN_emailAddress" */ const buffer *varname = hctx->conf.ssl_verifyclient_username; const buffer *vb = http_header_env_get(r, CONST_BUF_LEN(varname)); if (vb) { /* same as http_auth.c:http_auth_setenv() */ http_header_env_set(r, CONST_STR_LEN("REMOTE_USER"), CONST_BUF_LEN(vb)); http_header_env_set(r, CONST_STR_LEN("AUTH_TYPE"), CONST_STR_LEN("SSL_CLIENT_VERIFY")); } } if (hctx->conf.ssl_verifyclient_export_cert) { #ifdef WOLFSSL_VERSION int dersz, pemsz; const unsigned char *der = wolfSSL_X509_get_der(xs, &dersz); pemsz = der ? wc_DerToPemEx(der, dersz, NULL, 0, NULL, CERT_TYPE) : 0; if (pemsz > 0) { buffer_string_prepare_copy(tb, pemsz); if (0 == wc_DerToPemEx(der, dersz, (byte *)tb->ptr, pemsz, NULL, CERT_TYPE)) http_header_env_set(r, CONST_STR_LEN("SSL_CLIENT_CERT"), tb->ptr, (uint32_t)pemsz); } #else BIO *bio; if (NULL != (bio = BIO_new(BIO_s_mem()))) { PEM_write_bio_X509(bio, xs); const int n = BIO_pending(bio); buffer_string_prepare_copy(tb, n); BIO_read(bio, tb->ptr, n); BIO_free(bio); buffer_commit(tb, n); http_header_env_set(r, CONST_STR_LEN("SSL_CLIENT_CERT"), CONST_BUF_LEN(tb)); } #endif } X509_free(xs); } static void http_cgi_ssl_env (request_st * const r, handler_ctx * const hctx) { const char *s; const SSL_CIPHER *cipher; s = SSL_get_version(hctx->ssl); http_header_env_set(r, CONST_STR_LEN("SSL_PROTOCOL"), s, strlen(s)); if ((cipher = SSL_get_current_cipher(hctx->ssl))) { int usekeysize, algkeysize = 0; char buf[LI_ITOSTRING_LENGTH]; s = SSL_CIPHER_get_name(cipher); http_header_env_set(r, CONST_STR_LEN("SSL_CIPHER"), s, strlen(s)); #ifdef WOLFSSL_VERSION usekeysize = wolfSSL_CIPHER_get_bits(cipher, &algkeysize); #else usekeysize = SSL_CIPHER_get_bits(cipher, &algkeysize); #endif if (0 == algkeysize) algkeysize = usekeysize; http_header_env_set(r, CONST_STR_LEN("SSL_CIPHER_USEKEYSIZE"), buf, li_itostrn(buf, sizeof(buf), usekeysize)); http_header_env_set(r, CONST_STR_LEN("SSL_CIPHER_ALGKEYSIZE"), buf, li_itostrn(buf, sizeof(buf), algkeysize)); } } REQUEST_FUNC(mod_openssl_handle_request_env) { plugin_data *p = p_d; /* simple flag for request_env_patched */ if (r->plugin_ctx[p->id]) return HANDLER_GO_ON; handler_ctx *hctx = r->con->plugin_ctx[p->id]; if (NULL == hctx) return HANDLER_GO_ON; r->plugin_ctx[p->id] = (void *)(uintptr_t)1u; http_cgi_ssl_env(r, hctx); if (hctx->conf.ssl_verifyclient) { https_add_ssl_client_entries(r, hctx); } return HANDLER_GO_ON; } REQUEST_FUNC(mod_openssl_handle_uri_raw) { /* mod_openssl must be loaded prior to mod_auth * if mod_openssl is configured to set REMOTE_USER based on client cert */ /* mod_openssl must be loaded after mod_extforward * if mod_openssl config is based on lighttpd.conf remote IP conditional * using remote IP address set by mod_extforward, *unless* PROXY protocol * is enabled with extforward.hap-PROXY = "enable", in which case the * reverse is true: mod_extforward must be loaded after mod_openssl */ plugin_data *p = p_d; handler_ctx *hctx = r->con->plugin_ctx[p->id]; if (NULL == hctx) return HANDLER_GO_ON; mod_openssl_patch_config(r, &hctx->conf); if (hctx->conf.ssl_verifyclient) { mod_openssl_handle_request_env(r, p); } return HANDLER_GO_ON; } REQUEST_FUNC(mod_openssl_handle_request_reset) { plugin_data *p = p_d; r->plugin_ctx[p->id] = NULL; /* simple flag for request_env_patched */ return HANDLER_GO_ON; } TRIGGER_FUNC(mod_openssl_handle_trigger) { const plugin_data * const p = p_d; const time_t cur_ts = log_epoch_secs; if (cur_ts & 0x3f) return HANDLER_GO_ON; /*(continue once each 64 sec)*/ UNUSED(srv); UNUSED(p); #ifdef TLSEXT_TYPE_session_ticket mod_openssl_session_ticket_key_check(p, cur_ts); #endif #ifndef OPENSSL_NO_OCSP mod_openssl_refresh_stapling_files(srv, p, cur_ts); #endif return HANDLER_GO_ON; } int mod_openssl_plugin_init (plugin *p); int mod_openssl_plugin_init (plugin *p) { p->version = LIGHTTPD_VERSION_ID; p->name = "openssl"; p->init = mod_openssl_init; p->cleanup = mod_openssl_free; p->priv_defaults= mod_openssl_set_defaults; p->handle_connection_accept = mod_openssl_handle_con_accept; p->handle_connection_shut_wr = mod_openssl_handle_con_shut_wr; p->handle_connection_close = mod_openssl_handle_con_close; p->handle_uri_raw = mod_openssl_handle_uri_raw; p->handle_request_env = mod_openssl_handle_request_env; p->handle_request_reset = mod_openssl_handle_request_reset; p->handle_trigger = mod_openssl_handle_trigger; return 0; } #if defined(BORINGSSL_API_VERSION) \ || defined(LIBRESSL_VERSION_NUMBER) \ || defined(WOLFSSL_VERSION) static int mod_openssl_ssl_conf_proto_val (server *srv, plugin_config_socket *s, const buffer *b, int max) { if (NULL == b) /* default: min TLSv1.2, max TLSv1.3 */ #ifdef TLS1_3_VERSION return max ? TLS1_3_VERSION : TLS1_2_VERSION; #else return TLS1_2_VERSION; #endif else if (buffer_eq_icase_slen(b, CONST_STR_LEN("None"))) /*"disable" limit*/ return max ? #ifdef TLS1_3_VERSION TLS1_3_VERSION #else TLS1_2_VERSION #endif : (s->ssl_use_sslv3 ? SSL3_VERSION : TLS1_VERSION); else if (buffer_eq_icase_slen(b, CONST_STR_LEN("SSLv3"))) return SSL3_VERSION; else if (buffer_eq_icase_slen(b, CONST_STR_LEN("TLSv1.0"))) return TLS1_VERSION; else if (buffer_eq_icase_slen(b, CONST_STR_LEN("TLSv1.1"))) return TLS1_1_VERSION; else if (buffer_eq_icase_slen(b, CONST_STR_LEN("TLSv1.2"))) return TLS1_2_VERSION; #ifdef TLS1_3_VERSION else if (buffer_eq_icase_slen(b, CONST_STR_LEN("TLSv1.3"))) return TLS1_3_VERSION; #endif else { if (buffer_eq_icase_slen(b, CONST_STR_LEN("DTLSv1")) || buffer_eq_icase_slen(b, CONST_STR_LEN("DTLSv1.2"))) log_error(srv->errh, __FILE__, __LINE__, "SSL: ssl.openssl.ssl-conf-cmd %s %s ignored", max ? "MaxProtocol" : "MinProtocol", b->ptr); else log_error(srv->errh, __FILE__, __LINE__, "SSL: ssl.openssl.ssl-conf-cmd %s %s invalid; ignored", max ? "MaxProtocol" : "MinProtocol", b->ptr); } #ifdef TLS1_3_VERSION return max ? TLS1_3_VERSION : TLS1_2_VERSION; #else return TLS1_2_VERSION; #endif } static int mod_openssl_ssl_conf_cmd (server *srv, plugin_config_socket *s) { /* reference: * https://www.openssl.org/docs/man1.1.1/man3/SSL_CONF_cmd.html */ int rc = 0; buffer *cipherstring = NULL; /*buffer *ciphersuites = NULL;*/ buffer *minb = NULL; buffer *maxb = NULL; buffer *curves = NULL; for (size_t i = 0; i < s->ssl_conf_cmd->used; ++i) { data_string *ds = (data_string *)s->ssl_conf_cmd->data[i]; if (buffer_eq_icase_slen(&ds->key, CONST_STR_LEN("CipherString"))) cipherstring = &ds->value; #if 0 else if (buffer_eq_icase_slen(&ds->key, CONST_STR_LEN("Ciphersuites"))) ciphersuites = &ds->value; #endif else if (buffer_eq_icase_slen(&ds->key, CONST_STR_LEN("Curves")) || buffer_eq_icase_slen(&ds->key, CONST_STR_LEN("Groups"))) curves = &ds->value; else if (buffer_eq_icase_slen(&ds->key, CONST_STR_LEN("MaxProtocol"))) maxb = &ds->value; else if (buffer_eq_icase_slen(&ds->key, CONST_STR_LEN("MinProtocol"))) minb = &ds->value; else if (buffer_eq_icase_slen(&ds->key, CONST_STR_LEN("Protocol"))) { /* openssl config for Protocol=... is complex and deprecated */ log_error(srv->errh, __FILE__, __LINE__, "SSL: ssl.openssl.ssl-conf-cmd %s ignored; " "use MinProtocol=... and MaxProtocol=... instead", ds->key.ptr); } else if (buffer_eq_icase_slen(&ds->key, CONST_STR_LEN("Options"))) { for (char *v = ds->value.ptr, *e; *v; v = e) { while (*v == ' ' || *v == '\t' || *v == ',') ++v; int flag = 1; if (*v == '-') { flag = 0; ++v; } for (e = v; light_isalpha(*e); ++e) ; switch ((int)(e-v)) { case 11: if (buffer_eq_icase_ssn(v, "Compression", 11)) { if (flag) SSL_CTX_clear_options(s->ssl_ctx, SSL_OP_NO_COMPRESSION); else SSL_CTX_set_options(s->ssl_ctx, SSL_OP_NO_COMPRESSION); continue; } break; case 13: if (buffer_eq_icase_ssn(v, "SessionTicket", 13)) { if (flag) SSL_CTX_clear_options(s->ssl_ctx, SSL_OP_NO_TICKET); else SSL_CTX_set_options(s->ssl_ctx, SSL_OP_NO_TICKET); continue; } break; case 16: if (buffer_eq_icase_ssn(v, "ServerPreference", 16)) { if (flag) SSL_CTX_set_options(s->ssl_ctx, SSL_OP_CIPHER_SERVER_PREFERENCE); else SSL_CTX_clear_options(s->ssl_ctx, SSL_OP_CIPHER_SERVER_PREFERENCE); s->ssl_honor_cipher_order = flag; continue; } break; default: break; } /* warn if not explicitly handled or ignored above */ if (!flag) --v; log_error(srv->errh, __FILE__, __LINE__, "SSL: ssl.openssl.ssl-conf-cmd Options %.*s " "ignored", (int)(e-v), v); } } #if 0 else if (buffer_eq_icase_slen(&ds->key, CONST_STR_LEN("..."))) { } #endif else { /* warn if not explicitly handled or ignored above */ log_error(srv->errh, __FILE__, __LINE__, "SSL: ssl.openssl.ssl-conf-cmd %s ignored", ds->key.ptr); } } if (minb) { int n = mod_openssl_ssl_conf_proto_val(srv, s, minb, 0); #ifndef WOLFSSL_VERSION if (!SSL_CTX_set_min_proto_version(s->ssl_ctx, n)) rc = -1; #else /*(wolfSSL_CTX_SetMinVersion() alt uses enums with different values)*/ switch (n) { case SSL3_VERSION: n = WOLFSSL_SSLV3; break; case TLS1_VERSION: n = WOLFSSL_TLSV1; break; case TLS1_1_VERSION: n = WOLFSSL_TLSV1_1; break; case TLS1_2_VERSION: n = WOLFSSL_TLSV1_2; break; case TLS1_3_VERSION: n = WOLFSSL_TLSV1_3; break; default: rc = -1; break; } if (wolfSSL_CTX_SetMinVersion(s->ssl_ctx, n) != WOLFSSL_SUCCESS) rc = -1; #endif } if (maxb) { #ifndef WOLFSSL_VERSION /*WolfSSL max ver is set at WolfSSL compile-time*/ int x = mod_openssl_ssl_conf_proto_val(srv, s, maxb, 1); if (!SSL_CTX_set_max_proto_version(s->ssl_ctx, x)) rc = -1; #endif } if (cipherstring) { /* Disable support for low encryption ciphers */ buffer_append_string_len(cipherstring, CONST_STR_LEN(":!aNULL:!eNULL:!EXP")); if (SSL_CTX_set_cipher_list(s->ssl_ctx, s->ssl_cipher_list->ptr) != 1) { log_error(srv->errh, __FILE__, __LINE__, "SSL: %s", ERR_error_string(ERR_get_error(), NULL)); rc = -1; } if (s->ssl_honor_cipher_order) SSL_CTX_set_options(s->ssl_ctx, SSL_OP_CIPHER_SERVER_PREFERENCE); } if (curves) { if (!mod_openssl_ssl_conf_curves(srv, s, curves)) rc = -1; } return rc; } #endif /* BORINGSSL_API_VERSION || LIBRESSL_VERSION_NUMBER || WOLFSSL_VERSION */