1 /* crypto/x509/x509_vfy.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
62 #include <sys/types.h>
75 static int null_callback(int ok,X509_STORE_CTX *e);
76 static int internal_verify(X509_STORE_CTX *ctx);
78 static int null_callback();
79 static int internal_verify();
82 char *X509_version="X.509" OPENSSL_VERSION_PTEXT;
84 static STACK *x509_store_ctx_method=NULL;
85 static int x509_store_ctx_num=0;
87 static int x509_store_num=1;
88 static STACK *x509_store_method=NULL;
91 static int null_callback(ok,e)
99 static int x509_subject_cmp(a,b)
102 return(X509_subject_name_cmp(*a,*b));
106 int X509_verify_cert(ctx)
109 X509 *x,*xtmp,*chain_ss=NULL;
117 if (ctx->cert == NULL)
119 X509err(X509_F_X509_VERIFY_CERT,X509_R_NO_CERT_SET_FOR_US_TO_VERIFY);
123 cb=ctx->ctx->verify_cb;
124 if (cb == NULL) cb=null_callback;
126 /* first we make sure the chain we are going to build is
127 * present and that the first entry is in place */
128 if (ctx->chain == NULL)
130 if ( ((ctx->chain=sk_new_null()) == NULL) ||
131 (!sk_push(ctx->chain,(char *)ctx->cert)))
133 X509err(X509_F_X509_VERIFY_CERT,ERR_R_MALLOC_FAILURE);
136 CRYPTO_add(&ctx->cert->references,1,CRYPTO_LOCK_X509);
137 ctx->last_untrusted=1;
140 /* We use a temporary so we can chop and hack at it */
141 if ((ctx->untrusted != NULL) && (sktmp=sk_dup(ctx->untrusted)) == NULL)
143 X509err(X509_F_X509_VERIFY_CERT,ERR_R_MALLOC_FAILURE);
147 num=sk_num(ctx->chain);
148 x=(X509 *)sk_value(ctx->chain,num-1);
154 /* If we have enough, we break */
155 if (depth <= num) break;
157 /* If we are self signed, we break */
158 xn=X509_get_issuer_name(x);
159 if (X509_NAME_cmp(X509_get_subject_name(x),xn) == 0)
162 /* If we were passed a cert chain, use it first */
163 if (ctx->untrusted != NULL)
165 xtmp=X509_find_by_subject(sktmp,xn);
168 if (!sk_push(ctx->chain,(char *)xtmp))
170 X509err(X509_F_X509_VERIFY_CERT,ERR_R_MALLOC_FAILURE);
173 CRYPTO_add(&xtmp->references,1,CRYPTO_LOCK_X509);
174 sk_delete_ptr(sktmp,(char *)xtmp);
175 ctx->last_untrusted++;
178 /* reparse the full chain for
186 /* at this point, chain should contain a list of untrusted
187 * certificates. We now need to add at least one trusted one,
188 * if possible, otherwise we complain. */
190 i=sk_num(ctx->chain);
191 x=(X509 *)sk_value(ctx->chain,i-1);
192 if (X509_NAME_cmp(X509_get_subject_name(x),X509_get_issuer_name(x))
195 /* we have a self signed certificate */
196 if (sk_num(ctx->chain) == 1)
198 ctx->error=X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT;
200 ctx->error_depth=i-1;
206 /* worry more about this one elsewhere */
207 chain_ss=(X509 *)sk_pop(ctx->chain);
208 ctx->last_untrusted--;
210 x=(X509 *)sk_value(ctx->chain,num-1);
214 /* We now lookup certs from the certificate store */
217 /* If we have enough, we break */
218 if (depth <= num) break;
220 /* If we are self signed, we break */
221 xn=X509_get_issuer_name(x);
222 if (X509_NAME_cmp(X509_get_subject_name(x),xn) == 0)
225 ok=X509_STORE_get_by_subject(ctx,X509_LU_X509,xn,&obj);
226 if (ok != X509_LU_X509)
228 if (ok == X509_LU_RETRY)
230 X509_OBJECT_free_contents(&obj);
231 X509err(X509_F_X509_VERIFY_CERT,X509_R_SHOULD_RETRY);
234 else if (ok != X509_LU_FAIL)
236 X509_OBJECT_free_contents(&obj);
237 /* not good :-(, break anyway */
243 if (!sk_push(ctx->chain,(char *)obj.data.x509))
245 X509_OBJECT_free_contents(&obj);
246 X509err(X509_F_X509_VERIFY_CERT,ERR_R_MALLOC_FAILURE);
252 /* we now have our chain, lets check it... */
253 xn=X509_get_issuer_name(x);
254 if (X509_NAME_cmp(X509_get_subject_name(x),xn) != 0)
256 if ((chain_ss == NULL) || (X509_NAME_cmp(X509_get_subject_name(chain_ss),xn) != 0))
258 if (ctx->last_untrusted >= num)
259 ctx->error=X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY;
261 ctx->error=X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT;
267 sk_push(ctx->chain,(char *)chain_ss);
269 ctx->last_untrusted=num;
270 ctx->current_cert=chain_ss;
271 ctx->error=X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN;
275 ctx->error_depth=num-1;
280 /* We may as well copy down any DSA parameters that are required */
281 X509_get_pubkey_parameters(NULL,ctx->chain);
283 /* At this point, we have a chain and just need to verify it */
284 if (ctx->ctx->verify != NULL)
285 ok=ctx->ctx->verify(ctx);
287 ok=internal_verify(ctx);
291 X509_get_pubkey_parameters(NULL,ctx->chain);
293 if (sktmp != NULL) sk_free(sktmp);
294 if (chain_ss != NULL) X509_free(chain_ss);
298 static int internal_verify(ctx)
306 cb=ctx->ctx->verify_cb;
307 if (cb == NULL) cb=null_callback;
309 n=sk_num(ctx->chain);
310 ctx->error_depth=n-1;
312 xi=(X509 *)sk_value(ctx->chain,n);
313 if (X509_NAME_cmp(X509_get_subject_name(xi),
314 X509_get_issuer_name(xi)) == 0)
320 ctx->error=X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE;
321 ctx->current_cert=xi;
329 xs=(X509 *)sk_value(ctx->chain,n);
333 /* ctx->error=0; not needed */
339 if ((pkey=X509_get_pubkey(xi)) == NULL)
341 ctx->error=X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY;
342 ctx->current_cert=xi;
346 if (X509_verify(xs,pkey) <= 0)
349 ctx->error=X509_V_ERR_CERT_SIGNATURE_FAILURE;
350 ctx->current_cert=xs;
357 i=X509_cmp_current_time(X509_get_notBefore(xs));
360 ctx->error=X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD;
361 ctx->current_cert=xs;
367 ctx->error=X509_V_ERR_CERT_NOT_YET_VALID;
368 ctx->current_cert=xs;
375 i=X509_cmp_current_time(X509_get_notAfter(xs));
378 ctx->error=X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD;
379 ctx->current_cert=xs;
386 ctx->error=X509_V_ERR_CERT_HAS_EXPIRED;
387 ctx->current_cert=xs;
394 /* The last error (if any) is still in the error value */
395 ctx->current_cert=xs;
403 xs=(X509 *)sk_value(ctx->chain,n);
411 int X509_cmp_current_time(ctm)
417 char buff1[24],buff2[24],*p;
422 str=(char *)ctm->data;
423 if ((i < 11) || (i > 17)) return(0);
428 if ((*str == 'Z') || (*str == '-') || (*str == '+'))
429 { *(p++)='0'; *(p++)='0'; }
430 else { *(p++)= *(str++); *(p++)= *(str++); }
438 if ((*str != '+') && (str[5] != '-'))
440 offset=((str[1]-'0')*10+(str[2]-'0'))*60;
441 offset+=(str[3]-'0')*10+(str[4]-'0');
445 atm.type=V_ASN1_UTCTIME;
446 atm.length=sizeof(buff2);
447 atm.data=(unsigned char *)buff2;
449 X509_gmtime_adj(&atm,-offset);
451 i=(buff1[0]-'0')*10+(buff1[1]-'0');
452 if (i < 50) i+=100; /* cf. RFC 2459 */
453 j=(buff2[0]-'0')*10+(buff2[1]-'0');
456 if (i < j) return (-1);
457 if (i > j) return (1);
458 i=strcmp(buff1,buff2);
459 if (i == 0) /* wait a second then return younger :-) */
465 ASN1_UTCTIME *X509_gmtime_adj(s, adj)
473 return(ASN1_UTCTIME_set(s,t));
476 int X509_get_pubkey_parameters(pkey,chain)
480 EVP_PKEY *ktmp=NULL,*ktmp2;
483 if ((pkey != NULL) && !EVP_PKEY_missing_parameters(pkey)) return(1);
485 for (i=0; i<sk_num(chain); i++)
487 ktmp=X509_get_pubkey((X509 *)sk_value(chain,i));
490 X509err(X509_F_X509_GET_PUBKEY_PARAMETERS,X509_R_UNABLE_TO_GET_CERTS_PUBLIC_KEY);
493 if (!EVP_PKEY_missing_parameters(ktmp))
503 X509err(X509_F_X509_GET_PUBKEY_PARAMETERS,X509_R_UNABLE_TO_FIND_PARAMETERS_IN_CHAIN);
507 /* first, populate the other certs */
508 for (j=i-1; j >= 0; j--)
510 ktmp2=X509_get_pubkey((X509 *)sk_value(chain,j));
511 EVP_PKEY_copy_parameters(ktmp2,ktmp);
512 EVP_PKEY_free(ktmp2);
515 if (pkey != NULL) EVP_PKEY_copy_parameters(pkey,ktmp);
520 int X509_STORE_add_cert(ctx,x)
527 if (x == NULL) return(0);
528 obj=(X509_OBJECT *)Malloc(sizeof(X509_OBJECT));
531 X509err(X509_F_X509_STORE_ADD_CERT,ERR_R_MALLOC_FAILURE);
534 obj->type=X509_LU_X509;
537 CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
539 X509_OBJECT_up_ref_count(obj);
541 r=(X509_OBJECT *)lh_insert(ctx->certs,(char *)obj);
543 { /* oops, put it back */
544 lh_delete(ctx->certs,(char *)obj);
545 X509_OBJECT_free_contents(obj);
547 lh_insert(ctx->certs,(char *)r);
548 X509err(X509_F_X509_STORE_ADD_CERT,X509_R_CERT_ALREADY_IN_HASH_TABLE);
552 CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
557 int X509_STORE_add_crl(ctx,x)
564 if (x == NULL) return(0);
565 obj=(X509_OBJECT *)Malloc(sizeof(X509_OBJECT));
568 X509err(X509_F_X509_STORE_ADD_CRL,ERR_R_MALLOC_FAILURE);
571 obj->type=X509_LU_CRL;
574 CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
576 X509_OBJECT_up_ref_count(obj);
578 r=(X509_OBJECT *)lh_insert(ctx->certs,(char *)obj);
580 { /* oops, put it back */
581 lh_delete(ctx->certs,(char *)obj);
582 X509_OBJECT_free_contents(obj);
584 lh_insert(ctx->certs,(char *)r);
585 X509err(X509_F_X509_STORE_ADD_CRL,X509_R_CERT_ALREADY_IN_HASH_TABLE);
589 CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
594 int X509_STORE_CTX_get_ex_new_index(argl,argp,new_func,dup_func,free_func)
601 x509_store_ctx_num++;
602 return(CRYPTO_get_ex_new_index(x509_store_ctx_num-1,
603 &x509_store_ctx_method,
604 argl,argp,new_func,dup_func,free_func));
607 int X509_STORE_CTX_set_ex_data(ctx,idx,data)
612 return(CRYPTO_set_ex_data(&ctx->ex_data,idx,data));
615 void *X509_STORE_CTX_get_ex_data(ctx,idx)
619 return(CRYPTO_get_ex_data(&ctx->ex_data,idx));
622 int X509_STORE_CTX_get_error(ctx)
628 void X509_STORE_CTX_set_error(ctx,err)
635 int X509_STORE_CTX_get_error_depth(ctx)
638 return(ctx->error_depth);
641 X509 *X509_STORE_CTX_get_current_cert(ctx)
644 return(ctx->current_cert);
647 STACK *X509_STORE_CTX_get_chain(ctx)
653 void X509_STORE_CTX_set_cert(ctx,x)
660 void X509_STORE_CTX_set_chain(ctx,sk)