2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
5 /* ====================================================================
6 * Copyright (c) 1999-2004 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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 * ====================================================================
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).
59 /* Simple PKCS#7 processing functions */
63 #include <openssl/x509.h>
64 #include <openssl/x509v3.h>
66 static int pkcs7_copy_existing_digest(PKCS7 *p7, PKCS7_SIGNER_INFO *si);
68 PKCS7 *PKCS7_sign(X509 *signcert, EVP_PKEY *pkey, STACK_OF(X509) *certs,
74 if(!(p7 = PKCS7_new()))
76 PKCS7err(PKCS7_F_PKCS7_SIGN,ERR_R_MALLOC_FAILURE);
80 if (!PKCS7_set_type(p7, NID_pkcs7_signed))
83 if (!PKCS7_content_new(p7, NID_pkcs7_data))
86 if (pkey && !PKCS7_sign_add_signer(p7, signcert, pkey, NULL, flags))
88 PKCS7err(PKCS7_F_PKCS7_SIGN,PKCS7_R_PKCS7_ADD_SIGNER_ERROR);
92 if(!(flags & PKCS7_NOCERTS))
94 for(i = 0; i < sk_X509_num(certs); i++)
96 if (!PKCS7_add_certificate(p7, sk_X509_value(certs, i)))
101 if (flags & (PKCS7_STREAM|PKCS7_PARTIAL))
104 if (PKCS7_final(p7, data, flags))
112 int PKCS7_final(PKCS7 *p7, BIO *data, int flags)
116 if (!(p7bio = PKCS7_dataInit(p7, NULL)))
118 PKCS7err(PKCS7_F_PKCS7_FINAL,ERR_R_MALLOC_FAILURE);
122 SMIME_crlf_copy(data, p7bio, flags);
124 if(PKCS7_type_is_signed(p7) && (flags & PKCS7_DETACHED))
125 PKCS7_set_detached(p7, 1);
127 if (!PKCS7_dataFinal(p7,p7bio))
129 PKCS7err(PKCS7_F_PKCS7_FINAL,PKCS7_R_PKCS7_DATASIGN);
142 /* Check to see if a cipher exists and if so add S/MIME capabilities */
144 static int add_cipher_smcap(STACK_OF(X509_ALGOR) *sk, int nid, int arg)
146 if (EVP_get_cipherbynid(nid))
147 return PKCS7_simple_smimecap(sk, nid, arg);
151 PKCS7_SIGNER_INFO *PKCS7_sign_add_signer(PKCS7 *p7, X509 *signcert,
152 EVP_PKEY *pkey, const EVP_MD *md,
155 PKCS7_SIGNER_INFO *si = NULL;
157 STACK_OF(X509_ALGOR) *smcap = NULL;
158 if(!X509_check_private_key(signcert, pkey))
160 PKCS7err(PKCS7_F_PKCS7_SIGN_ADD_SIGNER,
161 PKCS7_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
165 if (!(si = PKCS7_add_signature(p7,signcert,pkey, md)))
167 PKCS7err(PKCS7_F_PKCS7_SIGN_ADD_SIGNER,
168 PKCS7_R_PKCS7_ADD_SIGNATURE_ERROR);
172 /* si is now part of p7 so don't free it on error */
176 if(!(flags & PKCS7_NOCERTS))
178 if (!PKCS7_add_certificate(p7, signcert))
182 if(!(flags & PKCS7_NOATTR))
184 if (!PKCS7_add_attrib_content_type(si, NULL))
186 /* Add SMIMECapabilities */
187 if(!(flags & PKCS7_NOSMIMECAP))
189 if(!(smcap = sk_X509_ALGOR_new_null()))
191 PKCS7err(PKCS7_F_PKCS7_SIGN_ADD_SIGNER,
192 ERR_R_MALLOC_FAILURE);
195 if (!add_cipher_smcap(smcap, NID_des_ede3_cbc, -1)
196 || !add_cipher_smcap(smcap, NID_rc2_cbc, 128)
197 || !add_cipher_smcap(smcap, NID_rc2_cbc, 64)
198 || !add_cipher_smcap(smcap, NID_des_cbc, -1)
199 || !add_cipher_smcap(smcap, NID_rc2_cbc, 40)
200 || !PKCS7_add_attrib_smimecap (si, smcap))
202 sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free);
205 if (flags & PKCS7_REUSE_DIGEST)
207 if (!pkcs7_copy_existing_digest(p7, si))
209 if (!PKCS7_SIGNER_INFO_sign(si))
216 sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free);
218 PKCS7_SIGNER_INFO_free(si);
222 /* Search for a digest matching SignerInfo digest type and if found
226 static int pkcs7_copy_existing_digest(PKCS7 *p7, PKCS7_SIGNER_INFO *si)
229 STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
230 PKCS7_SIGNER_INFO *sitmp;
231 ASN1_OCTET_STRING *osdig = NULL;
232 sinfos = PKCS7_get_signer_info(p7);
233 for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++)
235 sitmp = sk_PKCS7_SIGNER_INFO_value(sinfos, i);
238 if (sk_X509_ATTRIBUTE_num(sitmp->auth_attr) <= 0)
240 if (!OBJ_cmp(si->digest_alg->algorithm,
241 sitmp->digest_alg->algorithm))
243 osdig = PKCS7_digest_from_attributes(sitmp->auth_attr);
250 return PKCS7_add1_attrib_digest(si, osdig->data, osdig->length);
252 PKCS7err(PKCS7_F_PKCS7_COPY_EXISTING_DIGEST,
253 PKCS7_R_NO_MATCHING_DIGEST_TYPE_FOUND);
257 int PKCS7_verify(PKCS7 *p7, STACK_OF(X509) *certs, X509_STORE *store,
258 BIO *indata, BIO *out, int flags)
260 STACK_OF(X509) *signers;
262 STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
263 PKCS7_SIGNER_INFO *si;
264 X509_STORE_CTX cert_ctx;
266 int i, j=0, k, ret = 0;
271 PKCS7err(PKCS7_F_PKCS7_VERIFY,PKCS7_R_INVALID_NULL_POINTER);
275 if(!PKCS7_type_is_signed(p7)) {
276 PKCS7err(PKCS7_F_PKCS7_VERIFY,PKCS7_R_WRONG_CONTENT_TYPE);
280 /* Check for no data and no content: no data to verify signature */
281 if(PKCS7_get_detached(p7) && !indata) {
282 PKCS7err(PKCS7_F_PKCS7_VERIFY,PKCS7_R_NO_CONTENT);
286 /* NB: this test commented out because some versions of Netscape
287 * illegally include zero length content when signing data.
290 /* Check for data and content: two sets of data */
291 if(!PKCS7_get_detached(p7) && indata) {
292 PKCS7err(PKCS7_F_PKCS7_VERIFY,PKCS7_R_CONTENT_AND_DATA_PRESENT);
297 sinfos = PKCS7_get_signer_info(p7);
299 if(!sinfos || !sk_PKCS7_SIGNER_INFO_num(sinfos)) {
300 PKCS7err(PKCS7_F_PKCS7_VERIFY,PKCS7_R_NO_SIGNATURES_ON_DATA);
305 signers = PKCS7_get0_signers(p7, certs, flags);
307 if(!signers) return 0;
309 /* Now verify the certificates */
311 if (!(flags & PKCS7_NOVERIFY)) for (k = 0; k < sk_X509_num(signers); k++) {
312 signer = sk_X509_value (signers, k);
313 if (!(flags & PKCS7_NOCHAIN)) {
314 if(!X509_STORE_CTX_init(&cert_ctx, store, signer,
317 PKCS7err(PKCS7_F_PKCS7_VERIFY,ERR_R_X509_LIB);
318 sk_X509_free(signers);
321 X509_STORE_CTX_set_purpose(&cert_ctx,
322 X509_PURPOSE_SMIME_SIGN);
323 } else if(!X509_STORE_CTX_init (&cert_ctx, store, signer, NULL)) {
324 PKCS7err(PKCS7_F_PKCS7_VERIFY,ERR_R_X509_LIB);
325 sk_X509_free(signers);
328 if (!(flags & PKCS7_NOCRL))
329 X509_STORE_CTX_set0_crls(&cert_ctx, p7->d.sign->crl);
330 i = X509_verify_cert(&cert_ctx);
331 if (i <= 0) j = X509_STORE_CTX_get_error(&cert_ctx);
332 X509_STORE_CTX_cleanup(&cert_ctx);
334 PKCS7err(PKCS7_F_PKCS7_VERIFY,PKCS7_R_CERTIFICATE_VERIFY_ERROR);
335 ERR_add_error_data(2, "Verify error:",
336 X509_verify_cert_error_string(j));
337 sk_X509_free(signers);
340 /* Check for revocation status here */
343 /* Performance optimization: if the content is a memory BIO then
344 * store its contents in a temporary read only memory BIO. This
345 * avoids potentially large numbers of slow copies of data which will
346 * occur when reading from a read write memory BIO when signatures
350 if (indata && (BIO_method_type(indata) == BIO_TYPE_MEM))
354 len = BIO_get_mem_data(indata, &ptr);
355 tmpin = BIO_new_mem_buf(ptr, len);
358 PKCS7err(PKCS7_F_PKCS7_VERIFY,ERR_R_MALLOC_FAILURE);
366 p7bio=PKCS7_dataInit(p7,tmpin);
368 if(flags & PKCS7_TEXT) {
369 if(!(tmpout = BIO_new(BIO_s_mem()))) {
370 PKCS7err(PKCS7_F_PKCS7_VERIFY,ERR_R_MALLOC_FAILURE);
375 /* We now have to 'read' from p7bio to calculate digests etc. */
378 i=BIO_read(p7bio,buf,sizeof(buf));
380 if (tmpout) BIO_write(tmpout, buf, i);
383 if(flags & PKCS7_TEXT) {
384 if(!SMIME_text(tmpout, out)) {
385 PKCS7err(PKCS7_F_PKCS7_VERIFY,PKCS7_R_SMIME_TEXT_ERROR);
392 /* Now Verify All Signatures */
393 if (!(flags & PKCS7_NOSIGS))
394 for (i=0; i<sk_PKCS7_SIGNER_INFO_num(sinfos); i++)
396 si=sk_PKCS7_SIGNER_INFO_value(sinfos,i);
397 signer = sk_X509_value (signers, i);
398 j=PKCS7_signatureVerify(p7bio,p7,si, signer);
400 PKCS7err(PKCS7_F_PKCS7_VERIFY,PKCS7_R_SIGNATURE_FAILURE);
411 if (indata) BIO_pop(p7bio);
415 sk_X509_free(signers);
420 STACK_OF(X509) *PKCS7_get0_signers(PKCS7 *p7, STACK_OF(X509) *certs, int flags)
422 STACK_OF(X509) *signers;
423 STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
424 PKCS7_SIGNER_INFO *si;
425 PKCS7_ISSUER_AND_SERIAL *ias;
430 PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS,PKCS7_R_INVALID_NULL_POINTER);
434 if(!PKCS7_type_is_signed(p7)) {
435 PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS,PKCS7_R_WRONG_CONTENT_TYPE);
439 /* Collect all the signers together */
441 sinfos = PKCS7_get_signer_info(p7);
443 if(sk_PKCS7_SIGNER_INFO_num(sinfos) <= 0) {
444 PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS,PKCS7_R_NO_SIGNERS);
448 if(!(signers = sk_X509_new_null())) {
449 PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS,ERR_R_MALLOC_FAILURE);
453 for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++)
455 si = sk_PKCS7_SIGNER_INFO_value(sinfos, i);
456 ias = si->issuer_and_serial;
458 /* If any certificates passed they take priority */
459 if (certs) signer = X509_find_by_issuer_and_serial (certs,
460 ias->issuer, ias->serial);
461 if (!signer && !(flags & PKCS7_NOINTERN)
462 && p7->d.sign->cert) signer =
463 X509_find_by_issuer_and_serial (p7->d.sign->cert,
464 ias->issuer, ias->serial);
466 PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS,PKCS7_R_SIGNER_CERTIFICATE_NOT_FOUND);
467 sk_X509_free(signers);
471 sk_X509_push(signers, signer);
477 /* Build a complete PKCS#7 enveloped data */
479 PKCS7 *PKCS7_encrypt(STACK_OF(X509) *certs, BIO *in, const EVP_CIPHER *cipher,
486 if(!(p7 = PKCS7_new())) {
487 PKCS7err(PKCS7_F_PKCS7_ENCRYPT,ERR_R_MALLOC_FAILURE);
491 PKCS7_set_type(p7, NID_pkcs7_enveloped);
492 if(!PKCS7_set_cipher(p7, cipher)) {
493 PKCS7err(PKCS7_F_PKCS7_ENCRYPT,PKCS7_R_ERROR_SETTING_CIPHER);
497 for(i = 0; i < sk_X509_num(certs); i++) {
498 x509 = sk_X509_value(certs, i);
499 if(!PKCS7_add_recipient(p7, x509)) {
500 PKCS7err(PKCS7_F_PKCS7_ENCRYPT,
501 PKCS7_R_ERROR_ADDING_RECIPIENT);
506 if (PKCS7_final(p7, in, flags))
517 int PKCS7_decrypt(PKCS7 *p7, EVP_PKEY *pkey, X509 *cert, BIO *data, int flags)
524 PKCS7err(PKCS7_F_PKCS7_DECRYPT,PKCS7_R_INVALID_NULL_POINTER);
528 if(!PKCS7_type_is_enveloped(p7)) {
529 PKCS7err(PKCS7_F_PKCS7_DECRYPT,PKCS7_R_WRONG_CONTENT_TYPE);
533 if(cert && !X509_check_private_key(cert, pkey)) {
534 PKCS7err(PKCS7_F_PKCS7_DECRYPT,
535 PKCS7_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
539 if(!(tmpmem = PKCS7_dataDecode(p7, pkey, NULL, cert))) {
540 PKCS7err(PKCS7_F_PKCS7_DECRYPT, PKCS7_R_DECRYPT_ERROR);
544 if (flags & PKCS7_TEXT) {
546 /* Encrypt BIOs can't do BIO_gets() so add a buffer BIO */
547 if(!(tmpbuf = BIO_new(BIO_f_buffer()))) {
548 PKCS7err(PKCS7_F_PKCS7_DECRYPT, ERR_R_MALLOC_FAILURE);
551 if(!(bread = BIO_push(tmpbuf, tmpmem))) {
552 PKCS7err(PKCS7_F_PKCS7_DECRYPT, ERR_R_MALLOC_FAILURE);
555 ret = SMIME_text(bread, data);
560 i = BIO_read(tmpmem, buf, sizeof(buf));
562 BIO_write(data, buf, i);
564 BIO_free_all(tmpmem);