xref: /freebsd-12.1/crypto/openssl/crypto/evp/p_lib.c (revision 3b57f471) 
1 /*
2  * Copyright 1995-2019 The OpenSSL Project Authors. All Rights Reserved.
3  *
4  * Licensed under the OpenSSL license (the "License").  You may not use
5  * this file except in compliance with the License.  You can obtain a copy
6  * in the file LICENSE in the source distribution or at
7  * https://www.openssl.org/source/license.html
8  */
9 
10 #include <stdio.h>
11 #include "internal/cryptlib.h"
12 #include "internal/refcount.h"
13 #include <openssl/bn.h>
14 #include <openssl/err.h>
15 #include <openssl/objects.h>
16 #include <openssl/evp.h>
17 #include <openssl/x509.h>
18 #include <openssl/rsa.h>
19 #include <openssl/dsa.h>
20 #include <openssl/dh.h>
21 #include <openssl/cmac.h>
22 #include <openssl/engine.h>
23 
24 #include "internal/asn1_int.h"
25 #include "internal/evp_int.h"
26 
27 static void EVP_PKEY_free_it(EVP_PKEY *x);
28 
EVP_PKEY_bits(const EVP_PKEY * pkey)29 int EVP_PKEY_bits(const EVP_PKEY *pkey)
30 {
31     if (pkey && pkey->ameth && pkey->ameth->pkey_bits)
32         return pkey->ameth->pkey_bits(pkey);
33     return 0;
34 }
35 
EVP_PKEY_security_bits(const EVP_PKEY * pkey)36 int EVP_PKEY_security_bits(const EVP_PKEY *pkey)
37 {
38     if (pkey == NULL)
39         return 0;
40     if (!pkey->ameth || !pkey->ameth->pkey_security_bits)
41         return -2;
42     return pkey->ameth->pkey_security_bits(pkey);
43 }
44 
EVP_PKEY_size(const EVP_PKEY * pkey)45 int EVP_PKEY_size(const EVP_PKEY *pkey)
46 {
47     if (pkey && pkey->ameth && pkey->ameth->pkey_size)
48         return pkey->ameth->pkey_size(pkey);
49     return 0;
50 }
51 
EVP_PKEY_save_parameters(EVP_PKEY * pkey,int mode)52 int EVP_PKEY_save_parameters(EVP_PKEY *pkey, int mode)
53 {
54 #ifndef OPENSSL_NO_DSA
55     if (pkey->type == EVP_PKEY_DSA) {
56         int ret = pkey->save_parameters;
57 
58         if (mode >= 0)
59             pkey->save_parameters = mode;
60         return ret;
61     }
62 #endif
63 #ifndef OPENSSL_NO_EC
64     if (pkey->type == EVP_PKEY_EC) {
65         int ret = pkey->save_parameters;
66 
67         if (mode >= 0)
68             pkey->save_parameters = mode;
69         return ret;
70     }
71 #endif
72     return 0;
73 }
74 
EVP_PKEY_copy_parameters(EVP_PKEY * to,const EVP_PKEY * from)75 int EVP_PKEY_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
76 {
77     if (to->type == EVP_PKEY_NONE) {
78         if (EVP_PKEY_set_type(to, from->type) == 0)
79             return 0;
80     } else if (to->type != from->type) {
81         EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS, EVP_R_DIFFERENT_KEY_TYPES);
82         goto err;
83     }
84 
85     if (EVP_PKEY_missing_parameters(from)) {
86         EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS, EVP_R_MISSING_PARAMETERS);
87         goto err;
88     }
89 
90     if (!EVP_PKEY_missing_parameters(to)) {
91         if (EVP_PKEY_cmp_parameters(to, from) == 1)
92             return 1;
93         EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS, EVP_R_DIFFERENT_PARAMETERS);
94         return 0;
95     }
96 
97     if (from->ameth && from->ameth->param_copy)
98         return from->ameth->param_copy(to, from);
99  err:
100     return 0;
101 }
102 
EVP_PKEY_missing_parameters(const EVP_PKEY * pkey)103 int EVP_PKEY_missing_parameters(const EVP_PKEY *pkey)
104 {
105     if (pkey->ameth && pkey->ameth->param_missing)
106         return pkey->ameth->param_missing(pkey);
107     return 0;
108 }
109 
EVP_PKEY_cmp_parameters(const EVP_PKEY * a,const EVP_PKEY * b)110 int EVP_PKEY_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
111 {
112     if (a->type != b->type)
113         return -1;
114     if (a->ameth && a->ameth->param_cmp)
115         return a->ameth->param_cmp(a, b);
116     return -2;
117 }
118 
EVP_PKEY_cmp(const EVP_PKEY * a,const EVP_PKEY * b)119 int EVP_PKEY_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
120 {
121     if (a->type != b->type)
122         return -1;
123 
124     if (a->ameth) {
125         int ret;
126         /* Compare parameters if the algorithm has them */
127         if (a->ameth->param_cmp) {
128             ret = a->ameth->param_cmp(a, b);
129             if (ret <= 0)
130                 return ret;
131         }
132 
133         if (a->ameth->pub_cmp)
134             return a->ameth->pub_cmp(a, b);
135     }
136 
137     return -2;
138 }
139 
EVP_PKEY_new(void)140 EVP_PKEY *EVP_PKEY_new(void)
141 {
142     EVP_PKEY *ret = OPENSSL_zalloc(sizeof(*ret));
143 
144     if (ret == NULL) {
145         EVPerr(EVP_F_EVP_PKEY_NEW, ERR_R_MALLOC_FAILURE);
146         return NULL;
147     }
148     ret->type = EVP_PKEY_NONE;
149     ret->save_type = EVP_PKEY_NONE;
150     ret->references = 1;
151     ret->save_parameters = 1;
152     ret->lock = CRYPTO_THREAD_lock_new();
153     if (ret->lock == NULL) {
154         EVPerr(EVP_F_EVP_PKEY_NEW, ERR_R_MALLOC_FAILURE);
155         OPENSSL_free(ret);
156         return NULL;
157     }
158     return ret;
159 }
160 
EVP_PKEY_up_ref(EVP_PKEY * pkey)161 int EVP_PKEY_up_ref(EVP_PKEY *pkey)
162 {
163     int i;
164 
165     if (CRYPTO_UP_REF(&pkey->references, &i, pkey->lock) <= 0)
166         return 0;
167 
168     REF_PRINT_COUNT("EVP_PKEY", pkey);
169     REF_ASSERT_ISNT(i < 2);
170     return ((i > 1) ? 1 : 0);
171 }
172 
173 /*
174  * Setup a public key ASN1 method and ENGINE from a NID or a string. If pkey
175  * is NULL just return 1 or 0 if the algorithm exists.
176  */
177 
pkey_set_type(EVP_PKEY * pkey,ENGINE * e,int type,const char * str,int len)178 static int pkey_set_type(EVP_PKEY *pkey, ENGINE *e, int type, const char *str,
179                          int len)
180 {
181     const EVP_PKEY_ASN1_METHOD *ameth;
182     ENGINE **eptr = (e == NULL) ? &e :  NULL;
183 
184     if (pkey) {
185         if (pkey->pkey.ptr)
186             EVP_PKEY_free_it(pkey);
187         /*
188          * If key type matches and a method exists then this lookup has
189          * succeeded once so just indicate success.
190          */
191         if ((type == pkey->save_type) && pkey->ameth)
192             return 1;
193 #ifndef OPENSSL_NO_ENGINE
194         /* If we have ENGINEs release them */
195         ENGINE_finish(pkey->engine);
196         pkey->engine = NULL;
197         ENGINE_finish(pkey->pmeth_engine);
198         pkey->pmeth_engine = NULL;
199 #endif
200     }
201     if (str)
202         ameth = EVP_PKEY_asn1_find_str(eptr, str, len);
203     else
204         ameth = EVP_PKEY_asn1_find(eptr, type);
205 #ifndef OPENSSL_NO_ENGINE
206     if (pkey == NULL && eptr != NULL)
207         ENGINE_finish(e);
208 #endif
209     if (ameth == NULL) {
210         EVPerr(EVP_F_PKEY_SET_TYPE, EVP_R_UNSUPPORTED_ALGORITHM);
211         return 0;
212     }
213     if (pkey) {
214         pkey->ameth = ameth;
215         pkey->engine = e;
216 
217         pkey->type = pkey->ameth->pkey_id;
218         pkey->save_type = type;
219     }
220     return 1;
221 }
222 
EVP_PKEY_new_raw_private_key(int type,ENGINE * e,const unsigned char * priv,size_t len)223 EVP_PKEY *EVP_PKEY_new_raw_private_key(int type, ENGINE *e,
224                                        const unsigned char *priv,
225                                        size_t len)
226 {
227     EVP_PKEY *ret = EVP_PKEY_new();
228 
229     if (ret == NULL
230             || !pkey_set_type(ret, e, type, NULL, -1)) {
231         /* EVPerr already called */
232         goto err;
233     }
234 
235     if (ret->ameth->set_priv_key == NULL) {
236         EVPerr(EVP_F_EVP_PKEY_NEW_RAW_PRIVATE_KEY,
237                EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
238         goto err;
239     }
240 
241     if (!ret->ameth->set_priv_key(ret, priv, len)) {
242         EVPerr(EVP_F_EVP_PKEY_NEW_RAW_PRIVATE_KEY, EVP_R_KEY_SETUP_FAILED);
243         goto err;
244     }
245 
246     return ret;
247 
248  err:
249     EVP_PKEY_free(ret);
250     return NULL;
251 }
252 
EVP_PKEY_new_raw_public_key(int type,ENGINE * e,const unsigned char * pub,size_t len)253 EVP_PKEY *EVP_PKEY_new_raw_public_key(int type, ENGINE *e,
254                                       const unsigned char *pub,
255                                       size_t len)
256 {
257     EVP_PKEY *ret = EVP_PKEY_new();
258 
259     if (ret == NULL
260             || !pkey_set_type(ret, e, type, NULL, -1)) {
261         /* EVPerr already called */
262         goto err;
263     }
264 
265     if (ret->ameth->set_pub_key == NULL) {
266         EVPerr(EVP_F_EVP_PKEY_NEW_RAW_PUBLIC_KEY,
267                EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
268         goto err;
269     }
270 
271     if (!ret->ameth->set_pub_key(ret, pub, len)) {
272         EVPerr(EVP_F_EVP_PKEY_NEW_RAW_PUBLIC_KEY, EVP_R_KEY_SETUP_FAILED);
273         goto err;
274     }
275 
276     return ret;
277 
278  err:
279     EVP_PKEY_free(ret);
280     return NULL;
281 }
282 
EVP_PKEY_get_raw_private_key(const EVP_PKEY * pkey,unsigned char * priv,size_t * len)283 int EVP_PKEY_get_raw_private_key(const EVP_PKEY *pkey, unsigned char *priv,
284                                  size_t *len)
285 {
286      if (pkey->ameth->get_priv_key == NULL) {
287         EVPerr(EVP_F_EVP_PKEY_GET_RAW_PRIVATE_KEY,
288                EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
289         return 0;
290     }
291 
292     if (!pkey->ameth->get_priv_key(pkey, priv, len)) {
293         EVPerr(EVP_F_EVP_PKEY_GET_RAW_PRIVATE_KEY, EVP_R_GET_RAW_KEY_FAILED);
294         return 0;
295     }
296 
297     return 1;
298 }
299 
EVP_PKEY_get_raw_public_key(const EVP_PKEY * pkey,unsigned char * pub,size_t * len)300 int EVP_PKEY_get_raw_public_key(const EVP_PKEY *pkey, unsigned char *pub,
301                                 size_t *len)
302 {
303      if (pkey->ameth->get_pub_key == NULL) {
304         EVPerr(EVP_F_EVP_PKEY_GET_RAW_PUBLIC_KEY,
305                EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
306         return 0;
307     }
308 
309     if (!pkey->ameth->get_pub_key(pkey, pub, len)) {
310         EVPerr(EVP_F_EVP_PKEY_GET_RAW_PUBLIC_KEY, EVP_R_GET_RAW_KEY_FAILED);
311         return 0;
312     }
313 
314     return 1;
315 }
316 
EVP_PKEY_new_CMAC_key(ENGINE * e,const unsigned char * priv,size_t len,const EVP_CIPHER * cipher)317 EVP_PKEY *EVP_PKEY_new_CMAC_key(ENGINE *e, const unsigned char *priv,
318                                 size_t len, const EVP_CIPHER *cipher)
319 {
320 #ifndef OPENSSL_NO_CMAC
321     EVP_PKEY *ret = EVP_PKEY_new();
322     CMAC_CTX *cmctx = CMAC_CTX_new();
323 
324     if (ret == NULL
325             || cmctx == NULL
326             || !pkey_set_type(ret, e, EVP_PKEY_CMAC, NULL, -1)) {
327         /* EVPerr already called */
328         goto err;
329     }
330 
331     if (!CMAC_Init(cmctx, priv, len, cipher, e)) {
332         EVPerr(EVP_F_EVP_PKEY_NEW_CMAC_KEY, EVP_R_KEY_SETUP_FAILED);
333         goto err;
334     }
335 
336     ret->pkey.ptr = cmctx;
337     return ret;
338 
339  err:
340     EVP_PKEY_free(ret);
341     CMAC_CTX_free(cmctx);
342     return NULL;
343 #else
344     EVPerr(EVP_F_EVP_PKEY_NEW_CMAC_KEY,
345            EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
346     return NULL;
347 #endif
348 }
349 
EVP_PKEY_set_type(EVP_PKEY * pkey,int type)350 int EVP_PKEY_set_type(EVP_PKEY *pkey, int type)
351 {
352     return pkey_set_type(pkey, NULL, type, NULL, -1);
353 }
354 
EVP_PKEY_set_type_str(EVP_PKEY * pkey,const char * str,int len)355 int EVP_PKEY_set_type_str(EVP_PKEY *pkey, const char *str, int len)
356 {
357     return pkey_set_type(pkey, NULL, EVP_PKEY_NONE, str, len);
358 }
359 
EVP_PKEY_set_alias_type(EVP_PKEY * pkey,int type)360 int EVP_PKEY_set_alias_type(EVP_PKEY *pkey, int type)
361 {
362     if (pkey->type == type) {
363         return 1; /* it already is that type */
364     }
365 
366     /*
367      * The application is requesting to alias this to a different pkey type,
368      * but not one that resolves to the base type.
369      */
370     if (EVP_PKEY_type(type) != EVP_PKEY_base_id(pkey)) {
371         EVPerr(EVP_F_EVP_PKEY_SET_ALIAS_TYPE, EVP_R_UNSUPPORTED_ALGORITHM);
372         return 0;
373     }
374 
375     pkey->type = type;
376     return 1;
377 }
378 
379 #ifndef OPENSSL_NO_ENGINE
EVP_PKEY_set1_engine(EVP_PKEY * pkey,ENGINE * e)380 int EVP_PKEY_set1_engine(EVP_PKEY *pkey, ENGINE *e)
381 {
382     if (e != NULL) {
383         if (!ENGINE_init(e)) {
384             EVPerr(EVP_F_EVP_PKEY_SET1_ENGINE, ERR_R_ENGINE_LIB);
385             return 0;
386         }
387         if (ENGINE_get_pkey_meth(e, pkey->type) == NULL) {
388             ENGINE_finish(e);
389             EVPerr(EVP_F_EVP_PKEY_SET1_ENGINE, EVP_R_UNSUPPORTED_ALGORITHM);
390             return 0;
391         }
392     }
393     ENGINE_finish(pkey->pmeth_engine);
394     pkey->pmeth_engine = e;
395     return 1;
396 }
397 
EVP_PKEY_get0_engine(const EVP_PKEY * pkey)398 ENGINE *EVP_PKEY_get0_engine(const EVP_PKEY *pkey)
399 {
400     return pkey->engine;
401 }
402 #endif
EVP_PKEY_assign(EVP_PKEY * pkey,int type,void * key)403 int EVP_PKEY_assign(EVP_PKEY *pkey, int type, void *key)
404 {
405     if (pkey == NULL || !EVP_PKEY_set_type(pkey, type))
406         return 0;
407     pkey->pkey.ptr = key;
408     return (key != NULL);
409 }
410 
EVP_PKEY_get0(const EVP_PKEY * pkey)411 void *EVP_PKEY_get0(const EVP_PKEY *pkey)
412 {
413     return pkey->pkey.ptr;
414 }
415 
EVP_PKEY_get0_hmac(const EVP_PKEY * pkey,size_t * len)416 const unsigned char *EVP_PKEY_get0_hmac(const EVP_PKEY *pkey, size_t *len)
417 {
418     ASN1_OCTET_STRING *os = NULL;
419     if (pkey->type != EVP_PKEY_HMAC) {
420         EVPerr(EVP_F_EVP_PKEY_GET0_HMAC, EVP_R_EXPECTING_AN_HMAC_KEY);
421         return NULL;
422     }
423     os = EVP_PKEY_get0(pkey);
424     *len = os->length;
425     return os->data;
426 }
427 
428 #ifndef OPENSSL_NO_POLY1305
EVP_PKEY_get0_poly1305(const EVP_PKEY * pkey,size_t * len)429 const unsigned char *EVP_PKEY_get0_poly1305(const EVP_PKEY *pkey, size_t *len)
430 {
431     ASN1_OCTET_STRING *os = NULL;
432     if (pkey->type != EVP_PKEY_POLY1305) {
433         EVPerr(EVP_F_EVP_PKEY_GET0_POLY1305, EVP_R_EXPECTING_A_POLY1305_KEY);
434         return NULL;
435     }
436     os = EVP_PKEY_get0(pkey);
437     *len = os->length;
438     return os->data;
439 }
440 #endif
441 
442 #ifndef OPENSSL_NO_SIPHASH
EVP_PKEY_get0_siphash(const EVP_PKEY * pkey,size_t * len)443 const unsigned char *EVP_PKEY_get0_siphash(const EVP_PKEY *pkey, size_t *len)
444 {
445     ASN1_OCTET_STRING *os = NULL;
446 
447     if (pkey->type != EVP_PKEY_SIPHASH) {
448         EVPerr(EVP_F_EVP_PKEY_GET0_SIPHASH, EVP_R_EXPECTING_A_SIPHASH_KEY);
449         return NULL;
450     }
451     os = EVP_PKEY_get0(pkey);
452     *len = os->length;
453     return os->data;
454 }
455 #endif
456 
457 #ifndef OPENSSL_NO_RSA
EVP_PKEY_set1_RSA(EVP_PKEY * pkey,RSA * key)458 int EVP_PKEY_set1_RSA(EVP_PKEY *pkey, RSA *key)
459 {
460     int ret = EVP_PKEY_assign_RSA(pkey, key);
461     if (ret)
462         RSA_up_ref(key);
463     return ret;
464 }
465 
EVP_PKEY_get0_RSA(EVP_PKEY * pkey)466 RSA *EVP_PKEY_get0_RSA(EVP_PKEY *pkey)
467 {
468     if (pkey->type != EVP_PKEY_RSA) {
469         EVPerr(EVP_F_EVP_PKEY_GET0_RSA, EVP_R_EXPECTING_AN_RSA_KEY);
470         return NULL;
471     }
472     return pkey->pkey.rsa;
473 }
474 
EVP_PKEY_get1_RSA(EVP_PKEY * pkey)475 RSA *EVP_PKEY_get1_RSA(EVP_PKEY *pkey)
476 {
477     RSA *ret = EVP_PKEY_get0_RSA(pkey);
478     if (ret != NULL)
479         RSA_up_ref(ret);
480     return ret;
481 }
482 #endif
483 
484 #ifndef OPENSSL_NO_DSA
EVP_PKEY_set1_DSA(EVP_PKEY * pkey,DSA * key)485 int EVP_PKEY_set1_DSA(EVP_PKEY *pkey, DSA *key)
486 {
487     int ret = EVP_PKEY_assign_DSA(pkey, key);
488     if (ret)
489         DSA_up_ref(key);
490     return ret;
491 }
492 
EVP_PKEY_get0_DSA(EVP_PKEY * pkey)493 DSA *EVP_PKEY_get0_DSA(EVP_PKEY *pkey)
494 {
495     if (pkey->type != EVP_PKEY_DSA) {
496         EVPerr(EVP_F_EVP_PKEY_GET0_DSA, EVP_R_EXPECTING_A_DSA_KEY);
497         return NULL;
498     }
499     return pkey->pkey.dsa;
500 }
501 
EVP_PKEY_get1_DSA(EVP_PKEY * pkey)502 DSA *EVP_PKEY_get1_DSA(EVP_PKEY *pkey)
503 {
504     DSA *ret = EVP_PKEY_get0_DSA(pkey);
505     if (ret != NULL)
506         DSA_up_ref(ret);
507     return ret;
508 }
509 #endif
510 
511 #ifndef OPENSSL_NO_EC
512 
EVP_PKEY_set1_EC_KEY(EVP_PKEY * pkey,EC_KEY * key)513 int EVP_PKEY_set1_EC_KEY(EVP_PKEY *pkey, EC_KEY *key)
514 {
515     int ret = EVP_PKEY_assign_EC_KEY(pkey, key);
516     if (ret)
517         EC_KEY_up_ref(key);
518     return ret;
519 }
520 
EVP_PKEY_get0_EC_KEY(EVP_PKEY * pkey)521 EC_KEY *EVP_PKEY_get0_EC_KEY(EVP_PKEY *pkey)
522 {
523     if (pkey->type != EVP_PKEY_EC) {
524         EVPerr(EVP_F_EVP_PKEY_GET0_EC_KEY, EVP_R_EXPECTING_A_EC_KEY);
525         return NULL;
526     }
527     return pkey->pkey.ec;
528 }
529 
EVP_PKEY_get1_EC_KEY(EVP_PKEY * pkey)530 EC_KEY *EVP_PKEY_get1_EC_KEY(EVP_PKEY *pkey)
531 {
532     EC_KEY *ret = EVP_PKEY_get0_EC_KEY(pkey);
533     if (ret != NULL)
534         EC_KEY_up_ref(ret);
535     return ret;
536 }
537 #endif
538 
539 #ifndef OPENSSL_NO_DH
540 
EVP_PKEY_set1_DH(EVP_PKEY * pkey,DH * key)541 int EVP_PKEY_set1_DH(EVP_PKEY *pkey, DH *key)
542 {
543     int ret = EVP_PKEY_assign_DH(pkey, key);
544     if (ret)
545         DH_up_ref(key);
546     return ret;
547 }
548 
EVP_PKEY_get0_DH(EVP_PKEY * pkey)549 DH *EVP_PKEY_get0_DH(EVP_PKEY *pkey)
550 {
551     if (pkey->type != EVP_PKEY_DH && pkey->type != EVP_PKEY_DHX) {
552         EVPerr(EVP_F_EVP_PKEY_GET0_DH, EVP_R_EXPECTING_A_DH_KEY);
553         return NULL;
554     }
555     return pkey->pkey.dh;
556 }
557 
EVP_PKEY_get1_DH(EVP_PKEY * pkey)558 DH *EVP_PKEY_get1_DH(EVP_PKEY *pkey)
559 {
560     DH *ret = EVP_PKEY_get0_DH(pkey);
561     if (ret != NULL)
562         DH_up_ref(ret);
563     return ret;
564 }
565 #endif
566 
EVP_PKEY_type(int type)567 int EVP_PKEY_type(int type)
568 {
569     int ret;
570     const EVP_PKEY_ASN1_METHOD *ameth;
571     ENGINE *e;
572     ameth = EVP_PKEY_asn1_find(&e, type);
573     if (ameth)
574         ret = ameth->pkey_id;
575     else
576         ret = NID_undef;
577 #ifndef OPENSSL_NO_ENGINE
578     ENGINE_finish(e);
579 #endif
580     return ret;
581 }
582 
EVP_PKEY_id(const EVP_PKEY * pkey)583 int EVP_PKEY_id(const EVP_PKEY *pkey)
584 {
585     return pkey->type;
586 }
587 
EVP_PKEY_base_id(const EVP_PKEY * pkey)588 int EVP_PKEY_base_id(const EVP_PKEY *pkey)
589 {
590     return EVP_PKEY_type(pkey->type);
591 }
592 
EVP_PKEY_free(EVP_PKEY * x)593 void EVP_PKEY_free(EVP_PKEY *x)
594 {
595     int i;
596 
597     if (x == NULL)
598         return;
599 
600     CRYPTO_DOWN_REF(&x->references, &i, x->lock);
601     REF_PRINT_COUNT("EVP_PKEY", x);
602     if (i > 0)
603         return;
604     REF_ASSERT_ISNT(i < 0);
605     EVP_PKEY_free_it(x);
606     CRYPTO_THREAD_lock_free(x->lock);
607     sk_X509_ATTRIBUTE_pop_free(x->attributes, X509_ATTRIBUTE_free);
608     OPENSSL_free(x);
609 }
610 
EVP_PKEY_free_it(EVP_PKEY * x)611 static void EVP_PKEY_free_it(EVP_PKEY *x)
612 {
613     /* internal function; x is never NULL */
614     if (x->ameth && x->ameth->pkey_free) {
615         x->ameth->pkey_free(x);
616         x->pkey.ptr = NULL;
617     }
618 #ifndef OPENSSL_NO_ENGINE
619     ENGINE_finish(x->engine);
620     x->engine = NULL;
621     ENGINE_finish(x->pmeth_engine);
622     x->pmeth_engine = NULL;
623 #endif
624 }
625 
unsup_alg(BIO * out,const EVP_PKEY * pkey,int indent,const char * kstr)626 static int unsup_alg(BIO *out, const EVP_PKEY *pkey, int indent,
627                      const char *kstr)
628 {
629     BIO_indent(out, indent, 128);
630     BIO_printf(out, "%s algorithm \"%s\" unsupported\n",
631                kstr, OBJ_nid2ln(pkey->type));
632     return 1;
633 }
634 
EVP_PKEY_print_public(BIO * out,const EVP_PKEY * pkey,int indent,ASN1_PCTX * pctx)635 int EVP_PKEY_print_public(BIO *out, const EVP_PKEY *pkey,
636                           int indent, ASN1_PCTX *pctx)
637 {
638     if (pkey->ameth && pkey->ameth->pub_print)
639         return pkey->ameth->pub_print(out, pkey, indent, pctx);
640 
641     return unsup_alg(out, pkey, indent, "Public Key");
642 }
643 
EVP_PKEY_print_private(BIO * out,const EVP_PKEY * pkey,int indent,ASN1_PCTX * pctx)644 int EVP_PKEY_print_private(BIO *out, const EVP_PKEY *pkey,
645                            int indent, ASN1_PCTX *pctx)
646 {
647     if (pkey->ameth && pkey->ameth->priv_print)
648         return pkey->ameth->priv_print(out, pkey, indent, pctx);
649 
650     return unsup_alg(out, pkey, indent, "Private Key");
651 }
652 
EVP_PKEY_print_params(BIO * out,const EVP_PKEY * pkey,int indent,ASN1_PCTX * pctx)653 int EVP_PKEY_print_params(BIO *out, const EVP_PKEY *pkey,
654                           int indent, ASN1_PCTX *pctx)
655 {
656     if (pkey->ameth && pkey->ameth->param_print)
657         return pkey->ameth->param_print(out, pkey, indent, pctx);
658     return unsup_alg(out, pkey, indent, "Parameters");
659 }
660 
evp_pkey_asn1_ctrl(EVP_PKEY * pkey,int op,int arg1,void * arg2)661 static int evp_pkey_asn1_ctrl(EVP_PKEY *pkey, int op, int arg1, void *arg2)
662 {
663     if (pkey->ameth == NULL || pkey->ameth->pkey_ctrl == NULL)
664         return -2;
665     return pkey->ameth->pkey_ctrl(pkey, op, arg1, arg2);
666 }
667 
EVP_PKEY_get_default_digest_nid(EVP_PKEY * pkey,int * pnid)668 int EVP_PKEY_get_default_digest_nid(EVP_PKEY *pkey, int *pnid)
669 {
670     return evp_pkey_asn1_ctrl(pkey, ASN1_PKEY_CTRL_DEFAULT_MD_NID, 0, pnid);
671 }
672 
EVP_PKEY_set1_tls_encodedpoint(EVP_PKEY * pkey,const unsigned char * pt,size_t ptlen)673 int EVP_PKEY_set1_tls_encodedpoint(EVP_PKEY *pkey,
674                                const unsigned char *pt, size_t ptlen)
675 {
676     if (ptlen > INT_MAX)
677         return 0;
678     if (evp_pkey_asn1_ctrl(pkey, ASN1_PKEY_CTRL_SET1_TLS_ENCPT, ptlen,
679                            (void *)pt) <= 0)
680         return 0;
681     return 1;
682 }
683 
EVP_PKEY_get1_tls_encodedpoint(EVP_PKEY * pkey,unsigned char ** ppt)684 size_t EVP_PKEY_get1_tls_encodedpoint(EVP_PKEY *pkey, unsigned char **ppt)
685 {
686     int rv;
687     rv = evp_pkey_asn1_ctrl(pkey, ASN1_PKEY_CTRL_GET1_TLS_ENCPT, 0, ppt);
688     if (rv <= 0)
689         return 0;
690     return rv;
691 }
692