Import OpenSSL-0.9.8f.
[dragonfly.git] / crypto / openssl-0.9 / crypto / pkcs7 / pk7_smime.c
CommitLineData
56276539
SS
1/* pk7_smime.c */
2/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
3 * project.
4 */
5/* ====================================================================
6 * Copyright (c) 1999-2004 The OpenSSL Project. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
18 * distribution.
19 *
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24 *
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
29 *
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
33 *
34 * 6. Redistributions of any form whatsoever must retain the following
35 * acknowledgment:
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 *
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
52 *
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
56 *
57 */
58
59/* Simple PKCS#7 processing functions */
60
61#include <stdio.h>
62#include "cryptlib.h"
63#include <openssl/x509.h>
64#include <openssl/x509v3.h>
65
66PKCS7 *PKCS7_sign(X509 *signcert, EVP_PKEY *pkey, STACK_OF(X509) *certs,
67 BIO *data, int flags)
68{
e40c9513 69 PKCS7 *p7 = NULL;
56276539 70 PKCS7_SIGNER_INFO *si;
e40c9513
PA
71 BIO *p7bio = NULL;
72 STACK_OF(X509_ALGOR) *smcap = NULL;
56276539
SS
73 int i;
74
75 if(!X509_check_private_key(signcert, pkey)) {
76 PKCS7err(PKCS7_F_PKCS7_SIGN,PKCS7_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
77 return NULL;
78 }
79
80 if(!(p7 = PKCS7_new())) {
81 PKCS7err(PKCS7_F_PKCS7_SIGN,ERR_R_MALLOC_FAILURE);
82 return NULL;
83 }
84
e40c9513
PA
85 if (!PKCS7_set_type(p7, NID_pkcs7_signed))
86 goto err;
56276539 87
e40c9513
PA
88 if (!PKCS7_content_new(p7, NID_pkcs7_data))
89 goto err;
56276539 90
e40c9513 91 if (!(si = PKCS7_add_signature(p7,signcert,pkey,EVP_sha1()))) {
56276539 92 PKCS7err(PKCS7_F_PKCS7_SIGN,PKCS7_R_PKCS7_ADD_SIGNATURE_ERROR);
e40c9513 93 goto err;
56276539
SS
94 }
95
96 if(!(flags & PKCS7_NOCERTS)) {
e40c9513
PA
97 if (!PKCS7_add_certificate(p7, signcert))
98 goto err;
56276539 99 if(certs) for(i = 0; i < sk_X509_num(certs); i++)
e40c9513
PA
100 if (!PKCS7_add_certificate(p7, sk_X509_value(certs, i)))
101 goto err;
56276539
SS
102 }
103
104 if(!(flags & PKCS7_NOATTR)) {
e40c9513
PA
105 if (!PKCS7_add_signed_attribute(si, NID_pkcs9_contentType,
106 V_ASN1_OBJECT, OBJ_nid2obj(NID_pkcs7_data)))
107 goto err;
56276539
SS
108 /* Add SMIMECapabilities */
109 if(!(flags & PKCS7_NOSMIMECAP))
110 {
111 if(!(smcap = sk_X509_ALGOR_new_null())) {
112 PKCS7err(PKCS7_F_PKCS7_SIGN,ERR_R_MALLOC_FAILURE);
e40c9513 113 goto err;
56276539
SS
114 }
115#ifndef OPENSSL_NO_DES
e40c9513
PA
116 if (!PKCS7_simple_smimecap (smcap, NID_des_ede3_cbc, -1))
117 goto err;
56276539
SS
118#endif
119#ifndef OPENSSL_NO_RC2
e40c9513
PA
120 if (!PKCS7_simple_smimecap (smcap, NID_rc2_cbc, 128))
121 goto err;
122 if (!PKCS7_simple_smimecap (smcap, NID_rc2_cbc, 64))
123 goto err;
56276539
SS
124#endif
125#ifndef OPENSSL_NO_DES
e40c9513
PA
126 if (!PKCS7_simple_smimecap (smcap, NID_des_cbc, -1))
127 goto err;
56276539
SS
128#endif
129#ifndef OPENSSL_NO_RC2
e40c9513
PA
130 if (!PKCS7_simple_smimecap (smcap, NID_rc2_cbc, 40))
131 goto err;
56276539 132#endif
e40c9513
PA
133 if (!PKCS7_add_attrib_smimecap (si, smcap))
134 goto err;
56276539 135 sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free);
e40c9513 136 smcap = NULL;
56276539
SS
137 }
138 }
139
74093195
SS
140 if(flags & PKCS7_DETACHED)PKCS7_set_detached(p7, 1);
141
56276539
SS
142 if (flags & PKCS7_STREAM)
143 return p7;
144
74093195 145
56276539
SS
146 if (!(p7bio = PKCS7_dataInit(p7, NULL))) {
147 PKCS7err(PKCS7_F_PKCS7_SIGN,ERR_R_MALLOC_FAILURE);
e40c9513 148 goto err;
56276539
SS
149 }
150
151 SMIME_crlf_copy(data, p7bio, flags);
152
56276539 153
e40c9513 154 if (!PKCS7_dataFinal(p7,p7bio)) {
56276539 155 PKCS7err(PKCS7_F_PKCS7_SIGN,PKCS7_R_PKCS7_DATASIGN);
e40c9513 156 goto err;
56276539
SS
157 }
158
159 BIO_free_all(p7bio);
160 return p7;
e40c9513
PA
161err:
162 sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free);
163 BIO_free_all(p7bio);
164 PKCS7_free(p7);
165 return NULL;
56276539
SS
166}
167
168int PKCS7_verify(PKCS7 *p7, STACK_OF(X509) *certs, X509_STORE *store,
169 BIO *indata, BIO *out, int flags)
170{
171 STACK_OF(X509) *signers;
172 X509 *signer;
173 STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
174 PKCS7_SIGNER_INFO *si;
175 X509_STORE_CTX cert_ctx;
176 char buf[4096];
177 int i, j=0, k, ret = 0;
178 BIO *p7bio;
179 BIO *tmpin, *tmpout;
180
181 if(!p7) {
182 PKCS7err(PKCS7_F_PKCS7_VERIFY,PKCS7_R_INVALID_NULL_POINTER);
183 return 0;
184 }
185
186 if(!PKCS7_type_is_signed(p7)) {
187 PKCS7err(PKCS7_F_PKCS7_VERIFY,PKCS7_R_WRONG_CONTENT_TYPE);
188 return 0;
189 }
190
191 /* Check for no data and no content: no data to verify signature */
192 if(PKCS7_get_detached(p7) && !indata) {
193 PKCS7err(PKCS7_F_PKCS7_VERIFY,PKCS7_R_NO_CONTENT);
194 return 0;
195 }
196#if 0
197 /* NB: this test commented out because some versions of Netscape
198 * illegally include zero length content when signing data.
199 */
200
201 /* Check for data and content: two sets of data */
202 if(!PKCS7_get_detached(p7) && indata) {
203 PKCS7err(PKCS7_F_PKCS7_VERIFY,PKCS7_R_CONTENT_AND_DATA_PRESENT);
204 return 0;
205 }
206#endif
207
208 sinfos = PKCS7_get_signer_info(p7);
209
210 if(!sinfos || !sk_PKCS7_SIGNER_INFO_num(sinfos)) {
211 PKCS7err(PKCS7_F_PKCS7_VERIFY,PKCS7_R_NO_SIGNATURES_ON_DATA);
212 return 0;
213 }
214
215
216 signers = PKCS7_get0_signers(p7, certs, flags);
217
218 if(!signers) return 0;
219
220 /* Now verify the certificates */
221
222 if (!(flags & PKCS7_NOVERIFY)) for (k = 0; k < sk_X509_num(signers); k++) {
223 signer = sk_X509_value (signers, k);
224 if (!(flags & PKCS7_NOCHAIN)) {
225 if(!X509_STORE_CTX_init(&cert_ctx, store, signer,
226 p7->d.sign->cert))
227 {
228 PKCS7err(PKCS7_F_PKCS7_VERIFY,ERR_R_X509_LIB);
229 sk_X509_free(signers);
230 return 0;
231 }
232 X509_STORE_CTX_set_purpose(&cert_ctx,
233 X509_PURPOSE_SMIME_SIGN);
234 } else if(!X509_STORE_CTX_init (&cert_ctx, store, signer, NULL)) {
235 PKCS7err(PKCS7_F_PKCS7_VERIFY,ERR_R_X509_LIB);
236 sk_X509_free(signers);
237 return 0;
238 }
239 if (!(flags & PKCS7_NOCRL))
240 X509_STORE_CTX_set0_crls(&cert_ctx, p7->d.sign->crl);
241 i = X509_verify_cert(&cert_ctx);
242 if (i <= 0) j = X509_STORE_CTX_get_error(&cert_ctx);
243 X509_STORE_CTX_cleanup(&cert_ctx);
244 if (i <= 0) {
245 PKCS7err(PKCS7_F_PKCS7_VERIFY,PKCS7_R_CERTIFICATE_VERIFY_ERROR);
246 ERR_add_error_data(2, "Verify error:",
247 X509_verify_cert_error_string(j));
248 sk_X509_free(signers);
249 return 0;
250 }
251 /* Check for revocation status here */
252 }
253
254 /* Performance optimization: if the content is a memory BIO then
255 * store its contents in a temporary read only memory BIO. This
256 * avoids potentially large numbers of slow copies of data which will
257 * occur when reading from a read write memory BIO when signatures
258 * are calculated.
259 */
260
261 if (indata && (BIO_method_type(indata) == BIO_TYPE_MEM))
262 {
263 char *ptr;
264 long len;
265 len = BIO_get_mem_data(indata, &ptr);
266 tmpin = BIO_new_mem_buf(ptr, len);
267 if (tmpin == NULL)
268 {
269 PKCS7err(PKCS7_F_PKCS7_VERIFY,ERR_R_MALLOC_FAILURE);
270 return 0;
271 }
272 }
273 else
274 tmpin = indata;
275
276
e40c9513
PA
277 if (!(p7bio=PKCS7_dataInit(p7,tmpin)))
278 goto err;
56276539
SS
279
280 if(flags & PKCS7_TEXT) {
281 if(!(tmpout = BIO_new(BIO_s_mem()))) {
282 PKCS7err(PKCS7_F_PKCS7_VERIFY,ERR_R_MALLOC_FAILURE);
283 goto err;
284 }
285 } else tmpout = out;
286
287 /* We now have to 'read' from p7bio to calculate digests etc. */
288 for (;;)
289 {
290 i=BIO_read(p7bio,buf,sizeof(buf));
291 if (i <= 0) break;
292 if (tmpout) BIO_write(tmpout, buf, i);
293 }
294
295 if(flags & PKCS7_TEXT) {
296 if(!SMIME_text(tmpout, out)) {
297 PKCS7err(PKCS7_F_PKCS7_VERIFY,PKCS7_R_SMIME_TEXT_ERROR);
298 BIO_free(tmpout);
299 goto err;
300 }
301 BIO_free(tmpout);
302 }
303
304 /* Now Verify All Signatures */
305 if (!(flags & PKCS7_NOSIGS))
306 for (i=0; i<sk_PKCS7_SIGNER_INFO_num(sinfos); i++)
307 {
308 si=sk_PKCS7_SIGNER_INFO_value(sinfos,i);
309 signer = sk_X509_value (signers, i);
310 j=PKCS7_signatureVerify(p7bio,p7,si, signer);
311 if (j <= 0) {
312 PKCS7err(PKCS7_F_PKCS7_VERIFY,PKCS7_R_SIGNATURE_FAILURE);
313 goto err;
314 }
315 }
316
317 ret = 1;
318
319 err:
320
321 if (tmpin == indata)
322 {
323 if (indata) BIO_pop(p7bio);
324 }
325 BIO_free_all(p7bio);
326
327 sk_X509_free(signers);
328
329 return ret;
330}
331
332STACK_OF(X509) *PKCS7_get0_signers(PKCS7 *p7, STACK_OF(X509) *certs, int flags)
333{
334 STACK_OF(X509) *signers;
335 STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
336 PKCS7_SIGNER_INFO *si;
337 PKCS7_ISSUER_AND_SERIAL *ias;
338 X509 *signer;
339 int i;
340
341 if(!p7) {
342 PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS,PKCS7_R_INVALID_NULL_POINTER);
343 return NULL;
344 }
345
346 if(!PKCS7_type_is_signed(p7)) {
347 PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS,PKCS7_R_WRONG_CONTENT_TYPE);
348 return NULL;
349 }
350
351 /* Collect all the signers together */
352
353 sinfos = PKCS7_get_signer_info(p7);
354
355 if(sk_PKCS7_SIGNER_INFO_num(sinfos) <= 0) {
356 PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS,PKCS7_R_NO_SIGNERS);
e40c9513 357 return NULL;
56276539
SS
358 }
359
360 if(!(signers = sk_X509_new_null())) {
361 PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS,ERR_R_MALLOC_FAILURE);
362 return NULL;
363 }
364
365 for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++)
366 {
367 si = sk_PKCS7_SIGNER_INFO_value(sinfos, i);
368 ias = si->issuer_and_serial;
369 signer = NULL;
370 /* If any certificates passed they take priority */
371 if (certs) signer = X509_find_by_issuer_and_serial (certs,
372 ias->issuer, ias->serial);
373 if (!signer && !(flags & PKCS7_NOINTERN)
374 && p7->d.sign->cert) signer =
375 X509_find_by_issuer_and_serial (p7->d.sign->cert,
376 ias->issuer, ias->serial);
377 if (!signer) {
378 PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS,PKCS7_R_SIGNER_CERTIFICATE_NOT_FOUND);
379 sk_X509_free(signers);
e40c9513 380 return NULL;
56276539
SS
381 }
382
e40c9513
PA
383 if (!sk_X509_push(signers, signer)) {
384 sk_X509_free(signers);
385 return NULL;
386 }
56276539
SS
387 }
388 return signers;
389}
390
391
392/* Build a complete PKCS#7 enveloped data */
393
394PKCS7 *PKCS7_encrypt(STACK_OF(X509) *certs, BIO *in, const EVP_CIPHER *cipher,
395 int flags)
396{
397 PKCS7 *p7;
398 BIO *p7bio = NULL;
399 int i;
400 X509 *x509;
401 if(!(p7 = PKCS7_new())) {
402 PKCS7err(PKCS7_F_PKCS7_ENCRYPT,ERR_R_MALLOC_FAILURE);
403 return NULL;
404 }
405
e40c9513
PA
406 if (!PKCS7_set_type(p7, NID_pkcs7_enveloped))
407 goto err;
56276539
SS
408 if(!PKCS7_set_cipher(p7, cipher)) {
409 PKCS7err(PKCS7_F_PKCS7_ENCRYPT,PKCS7_R_ERROR_SETTING_CIPHER);
410 goto err;
411 }
412
413 for(i = 0; i < sk_X509_num(certs); i++) {
414 x509 = sk_X509_value(certs, i);
415 if(!PKCS7_add_recipient(p7, x509)) {
416 PKCS7err(PKCS7_F_PKCS7_ENCRYPT,
417 PKCS7_R_ERROR_ADDING_RECIPIENT);
418 goto err;
419 }
420 }
421
422 if(!(p7bio = PKCS7_dataInit(p7, NULL))) {
423 PKCS7err(PKCS7_F_PKCS7_ENCRYPT,ERR_R_MALLOC_FAILURE);
424 goto err;
425 }
426
427 SMIME_crlf_copy(in, p7bio, flags);
428
e6bc27f5 429 (void)BIO_flush(p7bio);
56276539
SS
430
431 if (!PKCS7_dataFinal(p7,p7bio)) {
432 PKCS7err(PKCS7_F_PKCS7_ENCRYPT,PKCS7_R_PKCS7_DATAFINAL_ERROR);
433 goto err;
434 }
435 BIO_free_all(p7bio);
436
437 return p7;
438
439 err:
440
e40c9513 441 BIO_free_all(p7bio);
56276539
SS
442 PKCS7_free(p7);
443 return NULL;
444
445}
446
447int PKCS7_decrypt(PKCS7 *p7, EVP_PKEY *pkey, X509 *cert, BIO *data, int flags)
448{
449 BIO *tmpmem;
450 int ret, i;
451 char buf[4096];
452
453 if(!p7) {
454 PKCS7err(PKCS7_F_PKCS7_DECRYPT,PKCS7_R_INVALID_NULL_POINTER);
455 return 0;
456 }
457
458 if(!PKCS7_type_is_enveloped(p7)) {
459 PKCS7err(PKCS7_F_PKCS7_DECRYPT,PKCS7_R_WRONG_CONTENT_TYPE);
460 return 0;
461 }
462
5bd86ce5 463 if(cert && !X509_check_private_key(cert, pkey)) {
56276539
SS
464 PKCS7err(PKCS7_F_PKCS7_DECRYPT,
465 PKCS7_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
466 return 0;
467 }
468
469 if(!(tmpmem = PKCS7_dataDecode(p7, pkey, NULL, cert))) {
470 PKCS7err(PKCS7_F_PKCS7_DECRYPT, PKCS7_R_DECRYPT_ERROR);
471 return 0;
472 }
473
474 if (flags & PKCS7_TEXT) {
475 BIO *tmpbuf, *bread;
476 /* Encrypt BIOs can't do BIO_gets() so add a buffer BIO */
477 if(!(tmpbuf = BIO_new(BIO_f_buffer()))) {
478 PKCS7err(PKCS7_F_PKCS7_DECRYPT, ERR_R_MALLOC_FAILURE);
e40c9513 479 BIO_free_all(tmpmem);
56276539
SS
480 return 0;
481 }
482 if(!(bread = BIO_push(tmpbuf, tmpmem))) {
483 PKCS7err(PKCS7_F_PKCS7_DECRYPT, ERR_R_MALLOC_FAILURE);
e40c9513
PA
484 BIO_free_all(tmpbuf);
485 BIO_free_all(tmpmem);
56276539
SS
486 return 0;
487 }
488 ret = SMIME_text(bread, data);
489 BIO_free_all(bread);
490 return ret;
491 } else {
492 for(;;) {
493 i = BIO_read(tmpmem, buf, sizeof(buf));
494 if(i <= 0) break;
495 BIO_write(data, buf, i);
496 }
497 BIO_free_all(tmpmem);
498 return 1;
499 }
500}