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path: root/src/lib/libcrypto/x509/x509_cmp.c
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1/* crypto/x509/x509_cmp.c */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
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.
8 *
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).
15 *
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.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
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)"
40 *
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
51 * SUCH DAMAGE.
52 *
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.]
57 */
58
59#include <stdio.h>
60#include <ctype.h>
61#include "cryptlib.h"
62#include <openssl/asn1.h>
63#include <openssl/objects.h>
64#include <openssl/x509.h>
65#include <openssl/x509v3.h>
66
67int X509_issuer_and_serial_cmp(const X509 *a, const X509 *b)
68 {
69 int i;
70 X509_CINF *ai,*bi;
71
72 ai=a->cert_info;
73 bi=b->cert_info;
74 i=M_ASN1_INTEGER_cmp(ai->serialNumber,bi->serialNumber);
75 if (i) return(i);
76 return(X509_NAME_cmp(ai->issuer,bi->issuer));
77 }
78
79#ifndef OPENSSL_NO_MD5
80unsigned long X509_issuer_and_serial_hash(X509 *a)
81 {
82 unsigned long ret=0;
83 EVP_MD_CTX ctx;
84 unsigned char md[16];
85 char *f;
86
87 EVP_MD_CTX_init(&ctx);
88 f=X509_NAME_oneline(a->cert_info->issuer,NULL,0);
89 ret=strlen(f);
90 EVP_DigestInit_ex(&ctx, EVP_md5(), NULL);
91 EVP_DigestUpdate(&ctx,(unsigned char *)f,ret);
92 OPENSSL_free(f);
93 EVP_DigestUpdate(&ctx,(unsigned char *)a->cert_info->serialNumber->data,
94 (unsigned long)a->cert_info->serialNumber->length);
95 EVP_DigestFinal_ex(&ctx,&(md[0]),NULL);
96 ret=( ((unsigned long)md[0] )|((unsigned long)md[1]<<8L)|
97 ((unsigned long)md[2]<<16L)|((unsigned long)md[3]<<24L)
98 )&0xffffffffL;
99 EVP_MD_CTX_cleanup(&ctx);
100 return(ret);
101 }
102#endif
103
104int X509_issuer_name_cmp(const X509 *a, const X509 *b)
105 {
106 return(X509_NAME_cmp(a->cert_info->issuer,b->cert_info->issuer));
107 }
108
109int X509_subject_name_cmp(const X509 *a, const X509 *b)
110 {
111 return(X509_NAME_cmp(a->cert_info->subject,b->cert_info->subject));
112 }
113
114int X509_CRL_cmp(const X509_CRL *a, const X509_CRL *b)
115 {
116 return(X509_NAME_cmp(a->crl->issuer,b->crl->issuer));
117 }
118
119X509_NAME *X509_get_issuer_name(X509 *a)
120 {
121 return(a->cert_info->issuer);
122 }
123
124unsigned long X509_issuer_name_hash(X509 *x)
125 {
126 return(X509_NAME_hash(x->cert_info->issuer));
127 }
128
129X509_NAME *X509_get_subject_name(X509 *a)
130 {
131 return(a->cert_info->subject);
132 }
133
134ASN1_INTEGER *X509_get_serialNumber(X509 *a)
135 {
136 return(a->cert_info->serialNumber);
137 }
138
139unsigned long X509_subject_name_hash(X509 *x)
140 {
141 return(X509_NAME_hash(x->cert_info->subject));
142 }
143
144#ifndef OPENSSL_NO_SHA
145/* Compare two certificates: they must be identical for
146 * this to work. NB: Although "cmp" operations are generally
147 * prototyped to take "const" arguments (eg. for use in
148 * STACKs), the way X509 handling is - these operations may
149 * involve ensuring the hashes are up-to-date and ensuring
150 * certain cert information is cached. So this is the point
151 * where the "depth-first" constification tree has to halt
152 * with an evil cast.
153 */
154int X509_cmp(const X509 *a, const X509 *b)
155{
156 /* ensure hash is valid */
157 X509_check_purpose((X509 *)a, -1, 0);
158 X509_check_purpose((X509 *)b, -1, 0);
159
160 return memcmp(a->sha1_hash, b->sha1_hash, SHA_DIGEST_LENGTH);
161}
162#endif
163
164
165/* Case insensitive string comparision */
166static int nocase_cmp(const ASN1_STRING *a, const ASN1_STRING *b)
167{
168 int i;
169
170 if (a->length != b->length)
171 return (a->length - b->length);
172
173 for (i=0; i<a->length; i++)
174 {
175 int ca, cb;
176
177 ca = tolower(a->data[i]);
178 cb = tolower(b->data[i]);
179
180 if (ca != cb)
181 return(ca-cb);
182 }
183 return 0;
184}
185
186/* Case insensitive string comparision with space normalization
187 * Space normalization - ignore leading, trailing spaces,
188 * multiple spaces between characters are replaced by single space
189 */
190static int nocase_spacenorm_cmp(const ASN1_STRING *a, const ASN1_STRING *b)
191{
192 unsigned char *pa = NULL, *pb = NULL;
193 int la, lb;
194
195 la = a->length;
196 lb = b->length;
197 pa = a->data;
198 pb = b->data;
199
200 /* skip leading spaces */
201 while (la > 0 && isspace(*pa))
202 {
203 la--;
204 pa++;
205 }
206 while (lb > 0 && isspace(*pb))
207 {
208 lb--;
209 pb++;
210 }
211
212 /* skip trailing spaces */
213 while (la > 0 && isspace(pa[la-1]))
214 la--;
215 while (lb > 0 && isspace(pb[lb-1]))
216 lb--;
217
218 /* compare strings with space normalization */
219 while (la > 0 && lb > 0)
220 {
221 int ca, cb;
222
223 /* compare character */
224 ca = tolower(*pa);
225 cb = tolower(*pb);
226 if (ca != cb)
227 return (ca - cb);
228
229 pa++; pb++;
230 la--; lb--;
231
232 if (la <= 0 || lb <= 0)
233 break;
234
235 /* is white space next character ? */
236 if (isspace(*pa) && isspace(*pb))
237 {
238 /* skip remaining white spaces */
239 while (la > 0 && isspace(*pa))
240 {
241 la--;
242 pa++;
243 }
244 while (lb > 0 && isspace(*pb))
245 {
246 lb--;
247 pb++;
248 }
249 }
250 }
251 if (la > 0 || lb > 0)
252 return la - lb;
253
254 return 0;
255}
256
257static int asn1_string_memcmp(ASN1_STRING *a, ASN1_STRING *b)
258 {
259 int j;
260 j = a->length - b->length;
261 if (j)
262 return j;
263 return memcmp(a->data, b->data, a->length);
264 }
265
266#define STR_TYPE_CMP (B_ASN1_PRINTABLESTRING|B_ASN1_T61STRING|B_ASN1_UTF8STRING)
267
268int X509_NAME_cmp(const X509_NAME *a, const X509_NAME *b)
269 {
270 int i,j;
271 X509_NAME_ENTRY *na,*nb;
272
273 unsigned long nabit, nbbit;
274
275 j = sk_X509_NAME_ENTRY_num(a->entries)
276 - sk_X509_NAME_ENTRY_num(b->entries);
277 if (j)
278 return j;
279 for (i=sk_X509_NAME_ENTRY_num(a->entries)-1; i>=0; i--)
280 {
281 na=sk_X509_NAME_ENTRY_value(a->entries,i);
282 nb=sk_X509_NAME_ENTRY_value(b->entries,i);
283 j=na->value->type-nb->value->type;
284 if (j)
285 {
286 nabit = ASN1_tag2bit(na->value->type);
287 nbbit = ASN1_tag2bit(nb->value->type);
288 if (!(nabit & STR_TYPE_CMP) ||
289 !(nbbit & STR_TYPE_CMP))
290 return j;
291 j = asn1_string_memcmp(na->value, nb->value);
292 }
293 else if (na->value->type == V_ASN1_PRINTABLESTRING)
294 j=nocase_spacenorm_cmp(na->value, nb->value);
295 else if (na->value->type == V_ASN1_IA5STRING
296 && OBJ_obj2nid(na->object) == NID_pkcs9_emailAddress)
297 j=nocase_cmp(na->value, nb->value);
298 else
299 j = asn1_string_memcmp(na->value, nb->value);
300 if (j) return(j);
301 j=na->set-nb->set;
302 if (j) return(j);
303 }
304
305 /* We will check the object types after checking the values
306 * since the values will more often be different than the object
307 * types. */
308 for (i=sk_X509_NAME_ENTRY_num(a->entries)-1; i>=0; i--)
309 {
310 na=sk_X509_NAME_ENTRY_value(a->entries,i);
311 nb=sk_X509_NAME_ENTRY_value(b->entries,i);
312 j=OBJ_cmp(na->object,nb->object);
313 if (j) return(j);
314 }
315 return(0);
316 }
317
318#ifndef OPENSSL_NO_MD5
319/* I now DER encode the name and hash it. Since I cache the DER encoding,
320 * this is reasonably efficient. */
321unsigned long X509_NAME_hash(X509_NAME *x)
322 {
323 unsigned long ret=0;
324 unsigned char md[16];
325 EVP_MD_CTX md_ctx;
326
327 /* Make sure X509_NAME structure contains valid cached encoding */
328 i2d_X509_NAME(x,NULL);
329 EVP_MD_CTX_init(&md_ctx);
330 EVP_MD_CTX_set_flags(&md_ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
331 EVP_DigestInit_ex(&md_ctx, EVP_md5(), NULL);
332 EVP_DigestUpdate(&md_ctx, x->bytes->data, x->bytes->length);
333 EVP_DigestFinal_ex(&md_ctx,md,NULL);
334 EVP_MD_CTX_cleanup(&md_ctx);
335
336 ret=( ((unsigned long)md[0] )|((unsigned long)md[1]<<8L)|
337 ((unsigned long)md[2]<<16L)|((unsigned long)md[3]<<24L)
338 )&0xffffffffL;
339 return(ret);
340 }
341#endif
342
343/* Search a stack of X509 for a match */
344X509 *X509_find_by_issuer_and_serial(STACK_OF(X509) *sk, X509_NAME *name,
345 ASN1_INTEGER *serial)
346 {
347 int i;
348 X509_CINF cinf;
349 X509 x,*x509=NULL;
350
351 if(!sk) return NULL;
352
353 x.cert_info= &cinf;
354 cinf.serialNumber=serial;
355 cinf.issuer=name;
356
357 for (i=0; i<sk_X509_num(sk); i++)
358 {
359 x509=sk_X509_value(sk,i);
360 if (X509_issuer_and_serial_cmp(x509,&x) == 0)
361 return(x509);
362 }
363 return(NULL);
364 }
365
366X509 *X509_find_by_subject(STACK_OF(X509) *sk, X509_NAME *name)
367 {
368 X509 *x509;
369 int i;
370
371 for (i=0; i<sk_X509_num(sk); i++)
372 {
373 x509=sk_X509_value(sk,i);
374 if (X509_NAME_cmp(X509_get_subject_name(x509),name) == 0)
375 return(x509);
376 }
377 return(NULL);
378 }
379
380EVP_PKEY *X509_get_pubkey(X509 *x)
381 {
382 if ((x == NULL) || (x->cert_info == NULL))
383 return(NULL);
384 return(X509_PUBKEY_get(x->cert_info->key));
385 }
386
387ASN1_BIT_STRING *X509_get0_pubkey_bitstr(const X509 *x)
388 {
389 if(!x) return NULL;
390 return x->cert_info->key->public_key;
391 }
392
393int X509_check_private_key(X509 *x, EVP_PKEY *k)
394 {
395 EVP_PKEY *xk=NULL;
396 int ok=0;
397
398 xk=X509_get_pubkey(x);
399 if (xk->type != k->type)
400 {
401 X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_KEY_TYPE_MISMATCH);
402 goto err;
403 }
404 switch (k->type)
405 {
406#ifndef OPENSSL_NO_RSA
407 case EVP_PKEY_RSA:
408 if (BN_cmp(xk->pkey.rsa->n,k->pkey.rsa->n) != 0
409 || BN_cmp(xk->pkey.rsa->e,k->pkey.rsa->e) != 0)
410 {
411 X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_KEY_VALUES_MISMATCH);
412 goto err;
413 }
414 break;
415#endif
416#ifndef OPENSSL_NO_DSA
417 case EVP_PKEY_DSA:
418 if (BN_cmp(xk->pkey.dsa->pub_key,k->pkey.dsa->pub_key) != 0)
419 {
420 X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_KEY_VALUES_MISMATCH);
421 goto err;
422 }
423 break;
424#endif
425#ifndef OPENSSL_NO_DH
426 case EVP_PKEY_DH:
427 /* No idea */
428 X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_CANT_CHECK_DH_KEY);
429 goto err;
430#endif
431 default:
432 X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_UNKNOWN_KEY_TYPE);
433 goto err;
434 }
435
436 ok=1;
437err:
438 EVP_PKEY_free(xk);
439 return(ok);
440 }
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