3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
6 /* ====================================================================
7 * Copyright (c) 1999-2004 The OpenSSL Project. All rights reserved.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
21 * 3. All advertising materials mentioning features or use of this
22 * software must display the following acknowledgment:
23 * "This product includes software developed by the OpenSSL Project
24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 * endorse or promote products derived from this software without
28 * prior written permission. For written permission, please contact
29 * licensing@OpenSSL.org.
31 * 5. Products derived from this software may not be called "OpenSSL"
32 * nor may "OpenSSL" appear in their names without prior written
33 * permission of the OpenSSL Project.
35 * 6. Redistributions of any form whatsoever must retain the following
37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 * OF THE POSSIBILITY OF SUCH DAMAGE.
52 * ====================================================================
54 * This product includes cryptographic software written by Eric Young
55 * (eay@cryptsoft.com). This product includes software written by Tim
56 * Hudson (tjh@cryptsoft.com).
60 /* Simple PKCS#7 processing functions */
64 #include <openssl/x509.h>
65 #include <openssl/x509v3.h>
67 static int pkcs7_copy_existing_digest(PKCS7 *p7, PKCS7_SIGNER_INFO *si);
69 PKCS7 *PKCS7_sign(X509 *signcert, EVP_PKEY *pkey, STACK_OF(X509) *certs,
75 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)) {
87 PKCS7err(PKCS7_F_PKCS7_SIGN, PKCS7_R_PKCS7_ADD_SIGNER_ERROR);
91 if (!(flags & PKCS7_NOCERTS)) {
92 for (i = 0; i < sk_X509_num(certs); i++) {
93 if (!PKCS7_add_certificate(p7, sk_X509_value(certs, i)))
98 if (flags & PKCS7_DETACHED)
99 PKCS7_set_detached(p7, 1);
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))) {
117 PKCS7err(PKCS7_F_PKCS7_FINAL, ERR_R_MALLOC_FAILURE);
121 SMIME_crlf_copy(data, p7bio, flags);
123 (void)BIO_flush(p7bio);
125 if (!PKCS7_dataFinal(p7, p7bio)) {
126 PKCS7err(PKCS7_F_PKCS7_FINAL, PKCS7_R_PKCS7_DATASIGN);
139 /* Check to see if a cipher exists and if so add S/MIME capabilities */
141 static int add_cipher_smcap(STACK_OF(X509_ALGOR) *sk, int nid, int arg)
143 if (EVP_get_cipherbynid(nid))
144 return PKCS7_simple_smimecap(sk, nid, arg);
148 static int add_digest_smcap(STACK_OF(X509_ALGOR) *sk, int nid, int arg)
150 if (EVP_get_digestbynid(nid))
151 return PKCS7_simple_smimecap(sk, nid, arg);
155 PKCS7_SIGNER_INFO *PKCS7_sign_add_signer(PKCS7 *p7, X509 *signcert,
156 EVP_PKEY *pkey, const EVP_MD *md,
159 PKCS7_SIGNER_INFO *si = NULL;
160 STACK_OF(X509_ALGOR) *smcap = NULL;
161 if (!X509_check_private_key(signcert, pkey)) {
162 PKCS7err(PKCS7_F_PKCS7_SIGN_ADD_SIGNER,
163 PKCS7_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
167 if (!(si = PKCS7_add_signature(p7, signcert, pkey, md))) {
168 PKCS7err(PKCS7_F_PKCS7_SIGN_ADD_SIGNER,
169 PKCS7_R_PKCS7_ADD_SIGNATURE_ERROR);
173 if (!(flags & PKCS7_NOCERTS)) {
174 if (!PKCS7_add_certificate(p7, signcert))
178 if (!(flags & PKCS7_NOATTR)) {
179 if (!PKCS7_add_attrib_content_type(si, NULL))
181 /* Add SMIMECapabilities */
182 if (!(flags & PKCS7_NOSMIMECAP)) {
183 if (!(smcap = sk_X509_ALGOR_new_null())) {
184 PKCS7err(PKCS7_F_PKCS7_SIGN_ADD_SIGNER, ERR_R_MALLOC_FAILURE);
187 if (!add_cipher_smcap(smcap, NID_aes_256_cbc, -1)
188 || !add_digest_smcap(smcap, NID_id_GostR3411_94, -1)
189 || !add_cipher_smcap(smcap, NID_id_Gost28147_89, -1)
190 || !add_cipher_smcap(smcap, NID_aes_192_cbc, -1)
191 || !add_cipher_smcap(smcap, NID_aes_128_cbc, -1)
192 || !add_cipher_smcap(smcap, NID_des_ede3_cbc, -1)
193 || !add_cipher_smcap(smcap, NID_rc2_cbc, 128)
194 || !add_cipher_smcap(smcap, NID_rc2_cbc, 64)
195 || !add_cipher_smcap(smcap, NID_des_cbc, -1)
196 || !add_cipher_smcap(smcap, NID_rc2_cbc, 40)
197 || !PKCS7_add_attrib_smimecap(si, smcap))
199 sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free);
202 if (flags & PKCS7_REUSE_DIGEST) {
203 if (!pkcs7_copy_existing_digest(p7, si))
205 if (!(flags & PKCS7_PARTIAL) && !PKCS7_SIGNER_INFO_sign(si))
211 sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free);
216 * Search for a digest matching SignerInfo digest type and if found copy
220 static int pkcs7_copy_existing_digest(PKCS7 *p7, PKCS7_SIGNER_INFO *si)
223 STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
224 PKCS7_SIGNER_INFO *sitmp;
225 ASN1_OCTET_STRING *osdig = NULL;
226 sinfos = PKCS7_get_signer_info(p7);
227 for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++) {
228 sitmp = sk_PKCS7_SIGNER_INFO_value(sinfos, i);
231 if (sk_X509_ATTRIBUTE_num(sitmp->auth_attr) <= 0)
233 if (!OBJ_cmp(si->digest_alg->algorithm, sitmp->digest_alg->algorithm)) {
234 osdig = PKCS7_digest_from_attributes(sitmp->auth_attr);
241 return PKCS7_add1_attrib_digest(si, osdig->data, osdig->length);
243 PKCS7err(PKCS7_F_PKCS7_COPY_EXISTING_DIGEST,
244 PKCS7_R_NO_MATCHING_DIGEST_TYPE_FOUND);
248 int PKCS7_verify(PKCS7 *p7, STACK_OF(X509) *certs, X509_STORE *store,
249 BIO *indata, BIO *out, int flags)
251 STACK_OF(X509) *signers;
253 STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
254 PKCS7_SIGNER_INFO *si;
255 X509_STORE_CTX cert_ctx;
257 int i, j = 0, k, ret = 0;
262 PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_INVALID_NULL_POINTER);
266 if (!PKCS7_type_is_signed(p7)) {
267 PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_WRONG_CONTENT_TYPE);
271 /* Check for no data and no content: no data to verify signature */
272 if (PKCS7_get_detached(p7) && !indata) {
273 PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_NO_CONTENT);
278 * Very old Netscape illegally included empty content with
279 * a detached signature. To not support that, enable the
282 #ifdef OPENSSL_DONT_SUPPORT_OLD_NETSCAPE
283 /* Check for data and content: two sets of data */
284 if (!PKCS7_get_detached(p7) && indata) {
285 PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_CONTENT_AND_DATA_PRESENT);
290 sinfos = PKCS7_get_signer_info(p7);
292 if (!sinfos || !sk_PKCS7_SIGNER_INFO_num(sinfos)) {
293 PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_NO_SIGNATURES_ON_DATA);
297 signers = PKCS7_get0_signers(p7, certs, flags);
302 /* Now verify the certificates */
304 if (!(flags & PKCS7_NOVERIFY))
305 for (k = 0; k < sk_X509_num(signers); k++) {
306 signer = sk_X509_value(signers, k);
307 if (!(flags & PKCS7_NOCHAIN)) {
308 if (!X509_STORE_CTX_init(&cert_ctx, store, signer,
310 PKCS7err(PKCS7_F_PKCS7_VERIFY, ERR_R_X509_LIB);
311 sk_X509_free(signers);
314 X509_STORE_CTX_set_default(&cert_ctx, "smime_sign");
315 } else if (!X509_STORE_CTX_init(&cert_ctx, store, signer, NULL)) {
316 PKCS7err(PKCS7_F_PKCS7_VERIFY, ERR_R_X509_LIB);
317 sk_X509_free(signers);
320 if (!(flags & PKCS7_NOCRL))
321 X509_STORE_CTX_set0_crls(&cert_ctx, p7->d.sign->crl);
322 i = X509_verify_cert(&cert_ctx);
324 j = X509_STORE_CTX_get_error(&cert_ctx);
325 X509_STORE_CTX_cleanup(&cert_ctx);
327 PKCS7err(PKCS7_F_PKCS7_VERIFY,
328 PKCS7_R_CERTIFICATE_VERIFY_ERROR);
329 ERR_add_error_data(2, "Verify error:",
330 X509_verify_cert_error_string(j));
331 sk_X509_free(signers);
334 /* Check for revocation status here */
338 * Performance optimization: if the content is a memory BIO then store
339 * its contents in a temporary read only memory BIO. This avoids
340 * potentially large numbers of slow copies of data which will occur when
341 * reading from a read write memory BIO when signatures are calculated.
344 if (indata && (BIO_method_type(indata) == BIO_TYPE_MEM)) {
347 len = BIO_get_mem_data(indata, &ptr);
348 tmpin = BIO_new_mem_buf(ptr, len);
350 PKCS7err(PKCS7_F_PKCS7_VERIFY, ERR_R_MALLOC_FAILURE);
356 if (!(p7bio = PKCS7_dataInit(p7, tmpin)))
359 if (flags & PKCS7_TEXT) {
360 if (!(tmpout = BIO_new(BIO_s_mem()))) {
361 PKCS7err(PKCS7_F_PKCS7_VERIFY, ERR_R_MALLOC_FAILURE);
364 BIO_set_mem_eof_return(tmpout, 0);
368 /* We now have to 'read' from p7bio to calculate digests etc. */
370 i = BIO_read(p7bio, buf, sizeof(buf));
374 BIO_write(tmpout, buf, i);
377 if (flags & PKCS7_TEXT) {
378 if (!SMIME_text(tmpout, out)) {
379 PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_SMIME_TEXT_ERROR);
386 /* Now Verify All Signatures */
387 if (!(flags & PKCS7_NOSIGS))
388 for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++) {
389 si = sk_PKCS7_SIGNER_INFO_value(sinfos, i);
390 signer = sk_X509_value(signers, i);
391 j = PKCS7_signatureVerify(p7bio, p7, si, signer);
393 PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_SIGNATURE_FAILURE);
402 if (tmpin == indata) {
408 sk_X509_free(signers);
413 STACK_OF(X509) *PKCS7_get0_signers(PKCS7 *p7, STACK_OF(X509) *certs,
416 STACK_OF(X509) *signers;
417 STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
418 PKCS7_SIGNER_INFO *si;
419 PKCS7_ISSUER_AND_SERIAL *ias;
424 PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS, PKCS7_R_INVALID_NULL_POINTER);
428 if (!PKCS7_type_is_signed(p7)) {
429 PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS, PKCS7_R_WRONG_CONTENT_TYPE);
433 /* Collect all the signers together */
435 sinfos = PKCS7_get_signer_info(p7);
437 if (sk_PKCS7_SIGNER_INFO_num(sinfos) <= 0) {
438 PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS, PKCS7_R_NO_SIGNERS);
442 if (!(signers = sk_X509_new_null())) {
443 PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS, ERR_R_MALLOC_FAILURE);
447 for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++) {
448 si = sk_PKCS7_SIGNER_INFO_value(sinfos, i);
449 ias = si->issuer_and_serial;
451 /* If any certificates passed they take priority */
453 signer = X509_find_by_issuer_and_serial(certs,
454 ias->issuer, ias->serial);
455 if (!signer && !(flags & PKCS7_NOINTERN)
458 X509_find_by_issuer_and_serial(p7->d.sign->cert,
459 ias->issuer, ias->serial);
461 PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS,
462 PKCS7_R_SIGNER_CERTIFICATE_NOT_FOUND);
463 sk_X509_free(signers);
467 if (!sk_X509_push(signers, signer)) {
468 sk_X509_free(signers);
475 /* Build a complete PKCS#7 enveloped data */
477 PKCS7 *PKCS7_encrypt(STACK_OF(X509) *certs, BIO *in, const EVP_CIPHER *cipher,
484 if (!(p7 = PKCS7_new())) {
485 PKCS7err(PKCS7_F_PKCS7_ENCRYPT, ERR_R_MALLOC_FAILURE);
489 if (!PKCS7_set_type(p7, NID_pkcs7_enveloped))
491 if (!PKCS7_set_cipher(p7, cipher)) {
492 PKCS7err(PKCS7_F_PKCS7_ENCRYPT, PKCS7_R_ERROR_SETTING_CIPHER);
496 for (i = 0; i < sk_X509_num(certs); i++) {
497 x509 = sk_X509_value(certs, i);
498 if (!PKCS7_add_recipient(p7, x509)) {
499 PKCS7err(PKCS7_F_PKCS7_ENCRYPT, PKCS7_R_ERROR_ADDING_RECIPIENT);
504 if (flags & PKCS7_STREAM)
507 if (PKCS7_final(p7, in, flags))
518 int PKCS7_decrypt(PKCS7 *p7, EVP_PKEY *pkey, X509 *cert, BIO *data, int flags)
525 PKCS7err(PKCS7_F_PKCS7_DECRYPT, PKCS7_R_INVALID_NULL_POINTER);
529 if (!PKCS7_type_is_enveloped(p7)) {
530 PKCS7err(PKCS7_F_PKCS7_DECRYPT, PKCS7_R_WRONG_CONTENT_TYPE);
534 if (cert && !X509_check_private_key(cert, pkey)) {
535 PKCS7err(PKCS7_F_PKCS7_DECRYPT,
536 PKCS7_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
540 if (!(tmpmem = PKCS7_dataDecode(p7, pkey, NULL, cert))) {
541 PKCS7err(PKCS7_F_PKCS7_DECRYPT, PKCS7_R_DECRYPT_ERROR);
545 if (flags & PKCS7_TEXT) {
547 /* Encrypt BIOs can't do BIO_gets() so add a buffer BIO */
548 if (!(tmpbuf = BIO_new(BIO_f_buffer()))) {
549 PKCS7err(PKCS7_F_PKCS7_DECRYPT, ERR_R_MALLOC_FAILURE);
550 BIO_free_all(tmpmem);
553 if (!(bread = BIO_push(tmpbuf, tmpmem))) {
554 PKCS7err(PKCS7_F_PKCS7_DECRYPT, ERR_R_MALLOC_FAILURE);
555 BIO_free_all(tmpbuf);
556 BIO_free_all(tmpmem);
559 ret = SMIME_text(bread, data);
560 if (ret > 0 && BIO_method_type(tmpmem) == BIO_TYPE_CIPHER) {
561 if (!BIO_get_cipher_status(tmpmem))
568 i = BIO_read(tmpmem, buf, sizeof(buf));
571 if (BIO_method_type(tmpmem) == BIO_TYPE_CIPHER) {
572 if (!BIO_get_cipher_status(tmpmem))
578 if (BIO_write(data, buf, i) != i) {
583 BIO_free_all(tmpmem);