1 /*
2  * Copyright 1999-2019 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 <openssl/conf.h>
13 #include <openssl/x509v3.h>
14 #include "ext_dat.h"
15 
16 static GENERAL_NAMES *v2i_subject_alt(X509V3_EXT_METHOD *method,
17                                       X509V3_CTX *ctx,
18                                       STACK_OF(CONF_VALUE) *nval);
19 static GENERAL_NAMES *v2i_issuer_alt(X509V3_EXT_METHOD *method,
20                                      X509V3_CTX *ctx,
21                                      STACK_OF(CONF_VALUE) *nval);
22 static int copy_email(X509V3_CTX *ctx, GENERAL_NAMES *gens, int move_p);
23 static int copy_issuer(X509V3_CTX *ctx, GENERAL_NAMES *gens);
24 static int do_othername(GENERAL_NAME *gen, const char *value, X509V3_CTX *ctx);
25 static int do_dirname(GENERAL_NAME *gen, const char *value, X509V3_CTX *ctx);
26 
27 const X509V3_EXT_METHOD v3_alt[3] = {
28     {NID_subject_alt_name, 0, ASN1_ITEM_ref(GENERAL_NAMES),
29      0, 0, 0, 0,
30      0, 0,
31      (X509V3_EXT_I2V) i2v_GENERAL_NAMES,
32      (X509V3_EXT_V2I)v2i_subject_alt,
33      NULL, NULL, NULL},
34 
35     {NID_issuer_alt_name, 0, ASN1_ITEM_ref(GENERAL_NAMES),
36      0, 0, 0, 0,
37      0, 0,
38      (X509V3_EXT_I2V) i2v_GENERAL_NAMES,
39      (X509V3_EXT_V2I)v2i_issuer_alt,
40      NULL, NULL, NULL},
41 
42     {NID_certificate_issuer, 0, ASN1_ITEM_ref(GENERAL_NAMES),
43      0, 0, 0, 0,
44      0, 0,
45      (X509V3_EXT_I2V) i2v_GENERAL_NAMES,
46      NULL, NULL, NULL, NULL},
47 };
48 
STACK_OF(CONF_VALUE)49 STACK_OF(CONF_VALUE) *i2v_GENERAL_NAMES(X509V3_EXT_METHOD *method,
50                                         GENERAL_NAMES *gens,
51                                         STACK_OF(CONF_VALUE) *ret)
52 {
53     int i;
54     GENERAL_NAME *gen;
55     for (i = 0; i < sk_GENERAL_NAME_num(gens); i++) {
56         gen = sk_GENERAL_NAME_value(gens, i);
57         ret = i2v_GENERAL_NAME(method, gen, ret);
58     }
59     if (!ret)
60         return sk_CONF_VALUE_new_null();
61     return ret;
62 }
63 
STACK_OF(CONF_VALUE)64 STACK_OF(CONF_VALUE) *i2v_GENERAL_NAME(X509V3_EXT_METHOD *method,
65                                        GENERAL_NAME *gen,
66                                        STACK_OF(CONF_VALUE) *ret)
67 {
68     unsigned char *p;
69     char oline[256], htmp[5];
70     int i;
71 
72     switch (gen->type) {
73     case GEN_OTHERNAME:
74         if (!X509V3_add_value("othername", "<unsupported>", &ret))
75             return NULL;
76         break;
77 
78     case GEN_X400:
79         if (!X509V3_add_value("X400Name", "<unsupported>", &ret))
80             return NULL;
81         break;
82 
83     case GEN_EDIPARTY:
84         if (!X509V3_add_value("EdiPartyName", "<unsupported>", &ret))
85             return NULL;
86         break;
87 
88     case GEN_EMAIL:
89         if (!X509V3_add_value_uchar("email", gen->d.ia5->data, &ret))
90             return NULL;
91         break;
92 
93     case GEN_DNS:
94         if (!X509V3_add_value_uchar("DNS", gen->d.ia5->data, &ret))
95             return NULL;
96         break;
97 
98     case GEN_URI:
99         if (!X509V3_add_value_uchar("URI", gen->d.ia5->data, &ret))
100             return NULL;
101         break;
102 
103     case GEN_DIRNAME:
104         if (X509_NAME_oneline(gen->d.dirn, oline, sizeof(oline)) == NULL
105                 || !X509V3_add_value("DirName", oline, &ret))
106             return NULL;
107         break;
108 
109     case GEN_IPADD:
110         p = gen->d.ip->data;
111         if (gen->d.ip->length == 4)
112             BIO_snprintf(oline, sizeof(oline), "%d.%d.%d.%d",
113                          p[0], p[1], p[2], p[3]);
114         else if (gen->d.ip->length == 16) {
115             oline[0] = 0;
116             for (i = 0; i < 8; i++) {
117                 BIO_snprintf(htmp, sizeof(htmp), "%X", p[0] << 8 | p[1]);
118                 p += 2;
119                 strcat(oline, htmp);
120                 if (i != 7)
121                     strcat(oline, ":");
122             }
123         } else {
124             if (!X509V3_add_value("IP Address", "<invalid>", &ret))
125                 return NULL;
126             break;
127         }
128         if (!X509V3_add_value("IP Address", oline, &ret))
129             return NULL;
130         break;
131 
132     case GEN_RID:
133         i2t_ASN1_OBJECT(oline, 256, gen->d.rid);
134         if (!X509V3_add_value("Registered ID", oline, &ret))
135             return NULL;
136         break;
137     }
138     return ret;
139 }
140 
GENERAL_NAME_print(BIO * out,GENERAL_NAME * gen)141 int GENERAL_NAME_print(BIO *out, GENERAL_NAME *gen)
142 {
143     unsigned char *p;
144     int i;
145     switch (gen->type) {
146     case GEN_OTHERNAME:
147         BIO_printf(out, "othername:<unsupported>");
148         break;
149 
150     case GEN_X400:
151         BIO_printf(out, "X400Name:<unsupported>");
152         break;
153 
154     case GEN_EDIPARTY:
155         /* Maybe fix this: it is supported now */
156         BIO_printf(out, "EdiPartyName:<unsupported>");
157         break;
158 
159     case GEN_EMAIL:
160         BIO_printf(out, "email:");
161         ASN1_STRING_print(out, gen->d.ia5);
162         break;
163 
164     case GEN_DNS:
165         BIO_printf(out, "DNS:");
166         ASN1_STRING_print(out, gen->d.ia5);
167         break;
168 
169     case GEN_URI:
170         BIO_printf(out, "URI:");
171         ASN1_STRING_print(out, gen->d.ia5);
172         break;
173 
174     case GEN_DIRNAME:
175         BIO_printf(out, "DirName:");
176         X509_NAME_print_ex(out, gen->d.dirn, 0, XN_FLAG_ONELINE);
177         break;
178 
179     case GEN_IPADD:
180         p = gen->d.ip->data;
181         if (gen->d.ip->length == 4)
182             BIO_printf(out, "IP Address:%d.%d.%d.%d", p[0], p[1], p[2], p[3]);
183         else if (gen->d.ip->length == 16) {
184             BIO_printf(out, "IP Address");
185             for (i = 0; i < 8; i++) {
186                 BIO_printf(out, ":%X", p[0] << 8 | p[1]);
187                 p += 2;
188             }
189             BIO_puts(out, "\n");
190         } else {
191             BIO_printf(out, "IP Address:<invalid>");
192             break;
193         }
194         break;
195 
196     case GEN_RID:
197         BIO_printf(out, "Registered ID:");
198         i2a_ASN1_OBJECT(out, gen->d.rid);
199         break;
200     }
201     return 1;
202 }
203 
v2i_issuer_alt(X509V3_EXT_METHOD * method,X509V3_CTX * ctx,STACK_OF (CONF_VALUE)* nval)204 static GENERAL_NAMES *v2i_issuer_alt(X509V3_EXT_METHOD *method,
205                                      X509V3_CTX *ctx,
206                                      STACK_OF(CONF_VALUE) *nval)
207 {
208     const int num = sk_CONF_VALUE_num(nval);
209     GENERAL_NAMES *gens = sk_GENERAL_NAME_new_reserve(NULL, num);
210     int i;
211 
212     if (gens == NULL) {
213         X509V3err(X509V3_F_V2I_ISSUER_ALT, ERR_R_MALLOC_FAILURE);
214         sk_GENERAL_NAME_free(gens);
215         return NULL;
216     }
217     for (i = 0; i < num; i++) {
218         CONF_VALUE *cnf = sk_CONF_VALUE_value(nval, i);
219 
220         if (!name_cmp(cnf->name, "issuer")
221             && cnf->value && strcmp(cnf->value, "copy") == 0) {
222             if (!copy_issuer(ctx, gens))
223                 goto err;
224         } else {
225             GENERAL_NAME *gen = v2i_GENERAL_NAME(method, ctx, cnf);
226 
227             if (gen == NULL)
228                 goto err;
229             sk_GENERAL_NAME_push(gens, gen); /* no failure as it was reserved */
230         }
231     }
232     return gens;
233  err:
234     sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
235     return NULL;
236 }
237 
238 /* Append subject altname of issuer to issuer alt name of subject */
239 
copy_issuer(X509V3_CTX * ctx,GENERAL_NAMES * gens)240 static int copy_issuer(X509V3_CTX *ctx, GENERAL_NAMES *gens)
241 {
242     GENERAL_NAMES *ialt;
243     GENERAL_NAME *gen;
244     X509_EXTENSION *ext;
245     int i, num;
246 
247     if (ctx && (ctx->flags == CTX_TEST))
248         return 1;
249     if (!ctx || !ctx->issuer_cert) {
250         X509V3err(X509V3_F_COPY_ISSUER, X509V3_R_NO_ISSUER_DETAILS);
251         goto err;
252     }
253     i = X509_get_ext_by_NID(ctx->issuer_cert, NID_subject_alt_name, -1);
254     if (i < 0)
255         return 1;
256     if ((ext = X509_get_ext(ctx->issuer_cert, i)) == NULL
257         || (ialt = X509V3_EXT_d2i(ext)) == NULL) {
258         X509V3err(X509V3_F_COPY_ISSUER, X509V3_R_ISSUER_DECODE_ERROR);
259         goto err;
260     }
261 
262     num = sk_GENERAL_NAME_num(ialt);
263     if (!sk_GENERAL_NAME_reserve(gens, num)) {
264         X509V3err(X509V3_F_COPY_ISSUER, ERR_R_MALLOC_FAILURE);
265         goto err;
266     }
267 
268     for (i = 0; i < num; i++) {
269         gen = sk_GENERAL_NAME_value(ialt, i);
270         sk_GENERAL_NAME_push(gens, gen);     /* no failure as it was reserved */
271     }
272     sk_GENERAL_NAME_free(ialt);
273 
274     return 1;
275 
276  err:
277     return 0;
278 
279 }
280 
v2i_subject_alt(X509V3_EXT_METHOD * method,X509V3_CTX * ctx,STACK_OF (CONF_VALUE)* nval)281 static GENERAL_NAMES *v2i_subject_alt(X509V3_EXT_METHOD *method,
282                                       X509V3_CTX *ctx,
283                                       STACK_OF(CONF_VALUE) *nval)
284 {
285     GENERAL_NAMES *gens;
286     CONF_VALUE *cnf;
287     const int num = sk_CONF_VALUE_num(nval);
288     int i;
289 
290     gens = sk_GENERAL_NAME_new_reserve(NULL, num);
291     if (gens == NULL) {
292         X509V3err(X509V3_F_V2I_SUBJECT_ALT, ERR_R_MALLOC_FAILURE);
293         sk_GENERAL_NAME_free(gens);
294         return NULL;
295     }
296 
297     for (i = 0; i < num; i++) {
298         cnf = sk_CONF_VALUE_value(nval, i);
299         if (!name_cmp(cnf->name, "email")
300             && cnf->value && strcmp(cnf->value, "copy") == 0) {
301             if (!copy_email(ctx, gens, 0))
302                 goto err;
303         } else if (!name_cmp(cnf->name, "email")
304                    && cnf->value && strcmp(cnf->value, "move") == 0) {
305             if (!copy_email(ctx, gens, 1))
306                 goto err;
307         } else {
308             GENERAL_NAME *gen;
309             if ((gen = v2i_GENERAL_NAME(method, ctx, cnf)) == NULL)
310                 goto err;
311             sk_GENERAL_NAME_push(gens, gen); /* no failure as it was reserved */
312         }
313     }
314     return gens;
315  err:
316     sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
317     return NULL;
318 }
319 
320 /*
321  * Copy any email addresses in a certificate or request to GENERAL_NAMES
322  */
323 
copy_email(X509V3_CTX * ctx,GENERAL_NAMES * gens,int move_p)324 static int copy_email(X509V3_CTX *ctx, GENERAL_NAMES *gens, int move_p)
325 {
326     X509_NAME *nm;
327     ASN1_IA5STRING *email = NULL;
328     X509_NAME_ENTRY *ne;
329     GENERAL_NAME *gen = NULL;
330     int i = -1;
331 
332     if (ctx != NULL && ctx->flags == CTX_TEST)
333         return 1;
334     if (ctx == NULL
335         || (ctx->subject_cert == NULL && ctx->subject_req == NULL)) {
336         X509V3err(X509V3_F_COPY_EMAIL, X509V3_R_NO_SUBJECT_DETAILS);
337         goto err;
338     }
339     /* Find the subject name */
340     if (ctx->subject_cert)
341         nm = X509_get_subject_name(ctx->subject_cert);
342     else
343         nm = X509_REQ_get_subject_name(ctx->subject_req);
344 
345     /* Now add any email address(es) to STACK */
346     while ((i = X509_NAME_get_index_by_NID(nm,
347                                            NID_pkcs9_emailAddress, i)) >= 0) {
348         ne = X509_NAME_get_entry(nm, i);
349         email = ASN1_STRING_dup(X509_NAME_ENTRY_get_data(ne));
350         if (move_p) {
351             X509_NAME_delete_entry(nm, i);
352             X509_NAME_ENTRY_free(ne);
353             i--;
354         }
355         if (email == NULL || (gen = GENERAL_NAME_new()) == NULL) {
356             X509V3err(X509V3_F_COPY_EMAIL, ERR_R_MALLOC_FAILURE);
357             goto err;
358         }
359         gen->d.ia5 = email;
360         email = NULL;
361         gen->type = GEN_EMAIL;
362         if (!sk_GENERAL_NAME_push(gens, gen)) {
363             X509V3err(X509V3_F_COPY_EMAIL, ERR_R_MALLOC_FAILURE);
364             goto err;
365         }
366         gen = NULL;
367     }
368 
369     return 1;
370 
371  err:
372     GENERAL_NAME_free(gen);
373     ASN1_IA5STRING_free(email);
374     return 0;
375 
376 }
377 
v2i_GENERAL_NAMES(const X509V3_EXT_METHOD * method,X509V3_CTX * ctx,STACK_OF (CONF_VALUE)* nval)378 GENERAL_NAMES *v2i_GENERAL_NAMES(const X509V3_EXT_METHOD *method,
379                                  X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *nval)
380 {
381     GENERAL_NAME *gen;
382     GENERAL_NAMES *gens;
383     CONF_VALUE *cnf;
384     const int num = sk_CONF_VALUE_num(nval);
385     int i;
386 
387     gens = sk_GENERAL_NAME_new_reserve(NULL, num);
388     if (gens == NULL) {
389         X509V3err(X509V3_F_V2I_GENERAL_NAMES, ERR_R_MALLOC_FAILURE);
390         sk_GENERAL_NAME_free(gens);
391         return NULL;
392     }
393 
394     for (i = 0; i < num; i++) {
395         cnf = sk_CONF_VALUE_value(nval, i);
396         if ((gen = v2i_GENERAL_NAME(method, ctx, cnf)) == NULL)
397             goto err;
398         sk_GENERAL_NAME_push(gens, gen);    /* no failure as it was reserved */
399     }
400     return gens;
401  err:
402     sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
403     return NULL;
404 }
405 
v2i_GENERAL_NAME(const X509V3_EXT_METHOD * method,X509V3_CTX * ctx,CONF_VALUE * cnf)406 GENERAL_NAME *v2i_GENERAL_NAME(const X509V3_EXT_METHOD *method,
407                                X509V3_CTX *ctx, CONF_VALUE *cnf)
408 {
409     return v2i_GENERAL_NAME_ex(NULL, method, ctx, cnf, 0);
410 }
411 
a2i_GENERAL_NAME(GENERAL_NAME * out,const X509V3_EXT_METHOD * method,X509V3_CTX * ctx,int gen_type,const char * value,int is_nc)412 GENERAL_NAME *a2i_GENERAL_NAME(GENERAL_NAME *out,
413                                const X509V3_EXT_METHOD *method,
414                                X509V3_CTX *ctx, int gen_type, const char *value,
415                                int is_nc)
416 {
417     char is_string = 0;
418     GENERAL_NAME *gen = NULL;
419 
420     if (!value) {
421         X509V3err(X509V3_F_A2I_GENERAL_NAME, X509V3_R_MISSING_VALUE);
422         return NULL;
423     }
424 
425     if (out)
426         gen = out;
427     else {
428         gen = GENERAL_NAME_new();
429         if (gen == NULL) {
430             X509V3err(X509V3_F_A2I_GENERAL_NAME, ERR_R_MALLOC_FAILURE);
431             return NULL;
432         }
433     }
434 
435     switch (gen_type) {
436     case GEN_URI:
437     case GEN_EMAIL:
438     case GEN_DNS:
439         is_string = 1;
440         break;
441 
442     case GEN_RID:
443         {
444             ASN1_OBJECT *obj;
445             if ((obj = OBJ_txt2obj(value, 0)) == NULL) {
446                 X509V3err(X509V3_F_A2I_GENERAL_NAME, X509V3_R_BAD_OBJECT);
447                 ERR_add_error_data(2, "value=", value);
448                 goto err;
449             }
450             gen->d.rid = obj;
451         }
452         break;
453 
454     case GEN_IPADD:
455         if (is_nc)
456             gen->d.ip = a2i_IPADDRESS_NC(value);
457         else
458             gen->d.ip = a2i_IPADDRESS(value);
459         if (gen->d.ip == NULL) {
460             X509V3err(X509V3_F_A2I_GENERAL_NAME, X509V3_R_BAD_IP_ADDRESS);
461             ERR_add_error_data(2, "value=", value);
462             goto err;
463         }
464         break;
465 
466     case GEN_DIRNAME:
467         if (!do_dirname(gen, value, ctx)) {
468             X509V3err(X509V3_F_A2I_GENERAL_NAME, X509V3_R_DIRNAME_ERROR);
469             goto err;
470         }
471         break;
472 
473     case GEN_OTHERNAME:
474         if (!do_othername(gen, value, ctx)) {
475             X509V3err(X509V3_F_A2I_GENERAL_NAME, X509V3_R_OTHERNAME_ERROR);
476             goto err;
477         }
478         break;
479     default:
480         X509V3err(X509V3_F_A2I_GENERAL_NAME, X509V3_R_UNSUPPORTED_TYPE);
481         goto err;
482     }
483 
484     if (is_string) {
485         if ((gen->d.ia5 = ASN1_IA5STRING_new()) == NULL ||
486             !ASN1_STRING_set(gen->d.ia5, (unsigned char *)value,
487                              strlen(value))) {
488             X509V3err(X509V3_F_A2I_GENERAL_NAME, ERR_R_MALLOC_FAILURE);
489             goto err;
490         }
491     }
492 
493     gen->type = gen_type;
494 
495     return gen;
496 
497  err:
498     if (!out)
499         GENERAL_NAME_free(gen);
500     return NULL;
501 }
502 
v2i_GENERAL_NAME_ex(GENERAL_NAME * out,const X509V3_EXT_METHOD * method,X509V3_CTX * ctx,CONF_VALUE * cnf,int is_nc)503 GENERAL_NAME *v2i_GENERAL_NAME_ex(GENERAL_NAME *out,
504                                   const X509V3_EXT_METHOD *method,
505                                   X509V3_CTX *ctx, CONF_VALUE *cnf, int is_nc)
506 {
507     int type;
508 
509     char *name, *value;
510 
511     name = cnf->name;
512     value = cnf->value;
513 
514     if (!value) {
515         X509V3err(X509V3_F_V2I_GENERAL_NAME_EX, X509V3_R_MISSING_VALUE);
516         return NULL;
517     }
518 
519     if (!name_cmp(name, "email"))
520         type = GEN_EMAIL;
521     else if (!name_cmp(name, "URI"))
522         type = GEN_URI;
523     else if (!name_cmp(name, "DNS"))
524         type = GEN_DNS;
525     else if (!name_cmp(name, "RID"))
526         type = GEN_RID;
527     else if (!name_cmp(name, "IP"))
528         type = GEN_IPADD;
529     else if (!name_cmp(name, "dirName"))
530         type = GEN_DIRNAME;
531     else if (!name_cmp(name, "otherName"))
532         type = GEN_OTHERNAME;
533     else {
534         X509V3err(X509V3_F_V2I_GENERAL_NAME_EX, X509V3_R_UNSUPPORTED_OPTION);
535         ERR_add_error_data(2, "name=", name);
536         return NULL;
537     }
538 
539     return a2i_GENERAL_NAME(out, method, ctx, type, value, is_nc);
540 
541 }
542 
do_othername(GENERAL_NAME * gen,const char * value,X509V3_CTX * ctx)543 static int do_othername(GENERAL_NAME *gen, const char *value, X509V3_CTX *ctx)
544 {
545     char *objtmp = NULL, *p;
546     int objlen;
547 
548     if ((p = strchr(value, ';')) == NULL)
549         return 0;
550     if ((gen->d.otherName = OTHERNAME_new()) == NULL)
551         return 0;
552     /*
553      * Free this up because we will overwrite it. no need to free type_id
554      * because it is static
555      */
556     ASN1_TYPE_free(gen->d.otherName->value);
557     if ((gen->d.otherName->value = ASN1_generate_v3(p + 1, ctx)) == NULL)
558         return 0;
559     objlen = p - value;
560     objtmp = OPENSSL_strndup(value, objlen);
561     if (objtmp == NULL)
562         return 0;
563     gen->d.otherName->type_id = OBJ_txt2obj(objtmp, 0);
564     OPENSSL_free(objtmp);
565     if (!gen->d.otherName->type_id)
566         return 0;
567     return 1;
568 }
569 
do_dirname(GENERAL_NAME * gen,const char * value,X509V3_CTX * ctx)570 static int do_dirname(GENERAL_NAME *gen, const char *value, X509V3_CTX *ctx)
571 {
572     int ret = 0;
573     STACK_OF(CONF_VALUE) *sk = NULL;
574     X509_NAME *nm;
575 
576     if ((nm = X509_NAME_new()) == NULL)
577         goto err;
578     sk = X509V3_get_section(ctx, value);
579     if (!sk) {
580         X509V3err(X509V3_F_DO_DIRNAME, X509V3_R_SECTION_NOT_FOUND);
581         ERR_add_error_data(2, "section=", value);
582         goto err;
583     }
584     /* FIXME: should allow other character types... */
585     ret = X509V3_NAME_from_section(nm, sk, MBSTRING_ASC);
586     if (!ret)
587         goto err;
588     gen->d.dirn = nm;
589 
590 err:
591     if (ret == 0)
592         X509_NAME_free(nm);
593     X509V3_section_free(ctx, sk);
594     return ret;
595 }
596