Bug Summary

File:src/lib/libcrypto/pkcs7/pk7_doit.c
Warning:line 790, column 9
Although the value stored to 'btmp' is used in the enclosing expression, the value is never actually read from 'btmp'

Annotated Source Code

Press '?' to see keyboard shortcuts

clang -cc1 -cc1 -triple amd64-unknown-openbsd7.4 -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name pk7_doit.c -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 1 -pic-is-pie -mframe-pointer=all -relaxed-aliasing -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -target-feature +retpoline-indirect-calls -target-feature +retpoline-indirect-branches -tune-cpu generic -debugger-tuning=gdb -fcoverage-compilation-dir=/usr/src/lib/libcrypto/obj -resource-dir /usr/local/llvm16/lib/clang/16 -D LIBRESSL_INTERNAL -D HAVE_FUNOPEN -I /usr/src/lib/libcrypto -I /usr/src/lib/libcrypto/arch/amd64 -I /usr/src/lib/libcrypto/asn1 -I /usr/src/lib/libcrypto/bio -I /usr/src/lib/libcrypto/bn -I /usr/src/lib/libcrypto/bn/arch/amd64 -I /usr/src/lib/libcrypto/bytestring -I /usr/src/lib/libcrypto/curve25519 -I /usr/src/lib/libcrypto/dh -I /usr/src/lib/libcrypto/dsa -I /usr/src/lib/libcrypto/ec -I /usr/src/lib/libcrypto/ecdsa -I /usr/src/lib/libcrypto/evp -I /usr/src/lib/libcrypto/hidden -I /usr/src/lib/libcrypto/hmac -I /usr/src/lib/libcrypto/kdf -I /usr/src/lib/libcrypto/modes -I /usr/src/lib/libcrypto/ocsp -I /usr/src/lib/libcrypto/pkcs12 -I /usr/src/lib/libcrypto/rsa -I /usr/src/lib/libcrypto/sha -I /usr/src/lib/libcrypto/ts -I /usr/src/lib/libcrypto/x509 -I /usr/src/lib/libcrypto/obj -D AES_ASM -D BSAES_ASM -D VPAES_ASM -D OPENSSL_IA32_SSE2 -D RSA_ASM -D OPENSSL_BN_ASM_MONT -D OPENSSL_BN_ASM_MONT5 -D MD5_ASM -D GHASH_ASM -D RC4_MD5_ASM -D SHA1_ASM -D SHA256_ASM -D SHA512_ASM -D WHIRLPOOL_ASM -D OPENSSL_CPUID_OBJ -internal-isystem /usr/local/llvm16/lib/clang/16/include -internal-externc-isystem /usr/include -O2 -fdebug-compilation-dir=/usr/src/lib/libcrypto/obj -ferror-limit 19 -fwrapv -D_RET_PROTECTOR -ret-protector -fcf-protection=branch -fno-jump-tables -fgnuc-version=4.2.1 -vectorize-loops -vectorize-slp -fno-builtin-malloc -fno-builtin-calloc -fno-builtin-realloc -fno-builtin-valloc -fno-builtin-free -fno-builtin-strdup -fno-builtin-strndup -analyzer-output=html -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /home/ben/Projects/scan/2024-01-11-140451-98009-1 -x c /usr/src/lib/libcrypto/pkcs7/pk7_doit.c
1/* $OpenBSD: pk7_doit.c,v 1.54 2023/11/15 00:55:43 tb Exp $ */
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 <stdlib.h>
61#include <string.h>
62
63#include <openssl/err.h>
64#include <openssl/objects.h>
65#include <openssl/x509.h>
66#include <openssl/x509v3.h>
67
68#include "evp_local.h"
69#include "x509_local.h"
70
71static int
72PKCS7_type_is_other(PKCS7* p7)
73{
74 int isOther = 1;
75
76 int nid = OBJ_obj2nid(p7->type);
77
78 switch (nid ) {
79 case NID_pkcs7_data21:
80 case NID_pkcs7_signed22:
81 case NID_pkcs7_enveloped23:
82 case NID_pkcs7_signedAndEnveloped24:
83 case NID_pkcs7_digest25:
84 case NID_pkcs7_encrypted26:
85 isOther = 0;
86 break;
87 default:
88 isOther = 1;
89 }
90
91 return isOther;
92
93}
94
95static ASN1_OCTET_STRING *
96PKCS7_get_octet_string(PKCS7 *p7)
97{
98 if (PKCS7_type_is_data(p7)(OBJ_obj2nid((p7)->type) == 21))
99 return p7->d.data;
100 if (PKCS7_type_is_other(p7) && p7->d.other &&
101 (p7->d.other->type == V_ASN1_OCTET_STRING4))
102 return p7->d.other->value.octet_string;
103 return NULL((void *)0);
104}
105
106static int
107PKCS7_bio_add_digest(BIO **pbio, X509_ALGOR *alg)
108{
109 BIO *btmp;
110 const EVP_MD *md;
111
112 if ((btmp = BIO_new(BIO_f_md())) == NULL((void *)0)) {
113 PKCS7error(ERR_R_BIO_LIB)ERR_put_error(33,(0xfff),(32),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,113);
114 goto err;
115 }
116
117 md = EVP_get_digestbyobj(alg->algorithm)EVP_get_digestbyname(OBJ_nid2sn(OBJ_obj2nid(alg->algorithm
)));
118 if (md == NULL((void *)0)) {
119 PKCS7error(PKCS7_R_UNKNOWN_DIGEST_TYPE)ERR_put_error(33,(0xfff),(109),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,119);
120 goto err;
121 }
122
123 if (BIO_set_md(btmp, md)BIO_ctrl(btmp,111,0,(char *)md) <= 0) {
124 PKCS7error(ERR_R_BIO_LIB)ERR_put_error(33,(0xfff),(32),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,124);
125 goto err;
126 }
127
128 if (*pbio == NULL((void *)0))
129 *pbio = btmp;
130 else if (!BIO_push(*pbio, btmp)) {
131 PKCS7error(ERR_R_BIO_LIB)ERR_put_error(33,(0xfff),(32),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,131);
132 goto err;
133 }
134 btmp = NULL((void *)0);
135
136 return 1;
137
138err:
139 BIO_free(btmp);
140 return 0;
141
142}
143
144static int
145pkcs7_encode_rinfo(PKCS7_RECIP_INFO *ri, unsigned char *key, int keylen)
146{
147 EVP_PKEY_CTX *pctx = NULL((void *)0);
148 EVP_PKEY *pkey = NULL((void *)0);
149 unsigned char *ek = NULL((void *)0);
150 int ret = 0;
151 size_t eklen;
152
153 pkey = X509_get_pubkey(ri->cert);
154 if (!pkey)
155 return 0;
156
157 pctx = EVP_PKEY_CTX_new(pkey, NULL((void *)0));
158 if (!pctx)
159 return 0;
160
161 if (EVP_PKEY_encrypt_init(pctx) <= 0)
162 goto err;
163
164 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_ENCRYPT(1<<8),
165 EVP_PKEY_CTRL_PKCS7_ENCRYPT3, 0, ri) <= 0) {
166 PKCS7error(PKCS7_R_CTRL_ERROR)ERR_put_error(33,(0xfff),(152),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,166);
167 goto err;
168 }
169
170 if (EVP_PKEY_encrypt(pctx, NULL((void *)0), &eklen, key, keylen) <= 0)
171 goto err;
172
173 ek = malloc(eklen);
174
175 if (ek == NULL((void *)0)) {
176 PKCS7error(ERR_R_MALLOC_FAILURE)ERR_put_error(33,(0xfff),((1|64)),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,176);
177 goto err;
178 }
179
180 if (EVP_PKEY_encrypt(pctx, ek, &eklen, key, keylen) <= 0)
181 goto err;
182
183 ASN1_STRING_set0(ri->enc_key, ek, eklen);
184 ek = NULL((void *)0);
185
186 ret = 1;
187
188err:
189 EVP_PKEY_free(pkey);
190 EVP_PKEY_CTX_free(pctx);
191 free(ek);
192 return ret;
193}
194
195
196static int
197pkcs7_decrypt_rinfo(unsigned char **pek, int *peklen, PKCS7_RECIP_INFO *ri,
198 EVP_PKEY *pkey, size_t fixlen)
199{
200 EVP_PKEY_CTX *pctx = NULL((void *)0);
201 unsigned char *ek = NULL((void *)0);
202 size_t eklen;
203
204 int ret = -1;
205
206 pctx = EVP_PKEY_CTX_new(pkey, NULL((void *)0));
207 if (!pctx)
208 return -1;
209
210 if (EVP_PKEY_decrypt_init(pctx) <= 0)
211 goto err;
212
213 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_DECRYPT(1<<9),
214 EVP_PKEY_CTRL_PKCS7_DECRYPT4, 0, ri) <= 0) {
215 PKCS7error(PKCS7_R_CTRL_ERROR)ERR_put_error(33,(0xfff),(152),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,215);
216 goto err;
217 }
218
219 if (EVP_PKEY_decrypt(pctx, NULL((void *)0), &eklen,
220 ri->enc_key->data, ri->enc_key->length) <= 0)
221 goto err;
222
223 ek = malloc(eklen);
224 if (ek == NULL((void *)0)) {
225 PKCS7error(ERR_R_MALLOC_FAILURE)ERR_put_error(33,(0xfff),((1|64)),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,225);
226 goto err;
227 }
228
229 if (EVP_PKEY_decrypt(pctx, ek, &eklen, ri->enc_key->data,
230 ri->enc_key->length) <= 0 || eklen == 0 ||
231 (fixlen != 0 && eklen != fixlen)) {
232 ret = 0;
233 PKCS7error(ERR_R_EVP_LIB)ERR_put_error(33,(0xfff),(6),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,233);
234 goto err;
235 }
236
237 ret = 1;
238
239 freezero(*pek, *peklen);
240
241 *pek = ek;
242 *peklen = eklen;
243
244err:
245 EVP_PKEY_CTX_free(pctx);
246 if (!ret && ek)
247 free(ek);
248
249 return ret;
250}
251
252BIO *
253PKCS7_dataInit(PKCS7 *p7, BIO *bio)
254{
255 int i;
256 BIO *out = NULL((void *)0), *btmp = NULL((void *)0);
257 X509_ALGOR *xa = NULL((void *)0);
258 const EVP_CIPHER *evp_cipher = NULL((void *)0);
259 STACK_OF(X509_ALGOR)struct stack_st_X509_ALGOR *md_sk = NULL((void *)0);
260 STACK_OF(PKCS7_RECIP_INFO)struct stack_st_PKCS7_RECIP_INFO *rsk = NULL((void *)0);
261 X509_ALGOR *xalg = NULL((void *)0);
262 PKCS7_RECIP_INFO *ri = NULL((void *)0);
263 ASN1_OCTET_STRING *os = NULL((void *)0);
264
265 if (p7 == NULL((void *)0)) {
266 PKCS7error(PKCS7_R_INVALID_NULL_POINTER)ERR_put_error(33,(0xfff),(143),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,266);
267 return NULL((void *)0);
268 }
269
270 /*
271 * The content field in the PKCS7 ContentInfo is optional,
272 * but that really only applies to inner content (precisely,
273 * detached signatures).
274 *
275 * When reading content, missing outer content is therefore
276 * treated as an error.
277 *
278 * When creating content, PKCS7_content_new() must be called
279 * before calling this method, so a NULL p7->d is always
280 * an error.
281 */
282 if (p7->d.ptr == NULL((void *)0)) {
283 PKCS7error(PKCS7_R_NO_CONTENT)ERR_put_error(33,(0xfff),(122),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,283);
284 return NULL((void *)0);
285 }
286
287 i = OBJ_obj2nid(p7->type);
288 p7->state = PKCS7_S_HEADER0;
289
290 switch (i) {
291 case NID_pkcs7_signed22:
292 md_sk = p7->d.sign->md_algs;
293 os = PKCS7_get_octet_string(p7->d.sign->contents);
294 break;
295 case NID_pkcs7_signedAndEnveloped24:
296 rsk = p7->d.signed_and_enveloped->recipientinfo;
297 md_sk = p7->d.signed_and_enveloped->md_algs;
298 xalg = p7->d.signed_and_enveloped->enc_data->algorithm;
299 evp_cipher = p7->d.signed_and_enveloped->enc_data->cipher;
300 if (evp_cipher == NULL((void *)0)) {
301 PKCS7error(PKCS7_R_CIPHER_NOT_INITIALIZED)ERR_put_error(33,(0xfff),(116),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,301);
302 goto err;
303 }
304 break;
305 case NID_pkcs7_enveloped23:
306 rsk = p7->d.enveloped->recipientinfo;
307 xalg = p7->d.enveloped->enc_data->algorithm;
308 evp_cipher = p7->d.enveloped->enc_data->cipher;
309 if (evp_cipher == NULL((void *)0)) {
310 PKCS7error(PKCS7_R_CIPHER_NOT_INITIALIZED)ERR_put_error(33,(0xfff),(116),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,310);
311 goto err;
312 }
313 break;
314 case NID_pkcs7_digest25:
315 xa = p7->d.digest->md;
316 os = PKCS7_get_octet_string(p7->d.digest->contents);
317 break;
318 case NID_pkcs7_data21:
319 break;
320 default:
321 PKCS7error(PKCS7_R_UNSUPPORTED_CONTENT_TYPE)ERR_put_error(33,(0xfff),(112),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,321);
322 goto err;
323 }
324
325 for (i = 0; i < sk_X509_ALGOR_num(md_sk)sk_num(((_STACK*) (1 ? (md_sk) : (struct stack_st_X509_ALGOR*
)0))); i++)
326 if (!PKCS7_bio_add_digest(&out, sk_X509_ALGOR_value(md_sk, i)((X509_ALGOR *)sk_value(((_STACK*) (1 ? (md_sk) : (struct stack_st_X509_ALGOR
*)0)), (i)))))
327 goto err;
328
329 if (xa && !PKCS7_bio_add_digest(&out, xa))
330 goto err;
331
332 if (evp_cipher != NULL((void *)0)) {
333 unsigned char key[EVP_MAX_KEY_LENGTH64];
334 unsigned char iv[EVP_MAX_IV_LENGTH16];
335 int keylen, ivlen;
336 EVP_CIPHER_CTX *ctx;
337
338 if ((btmp = BIO_new(BIO_f_cipher())) == NULL((void *)0)) {
339 PKCS7error(ERR_R_BIO_LIB)ERR_put_error(33,(0xfff),(32),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,339);
340 goto err;
341 }
342 BIO_get_cipher_ctx(btmp, &ctx)BIO_ctrl(btmp,129,0,(char *)&ctx);
343 keylen = EVP_CIPHER_key_length(evp_cipher);
344 ivlen = EVP_CIPHER_iv_length(evp_cipher);
345 xalg->algorithm = OBJ_nid2obj(EVP_CIPHER_type(evp_cipher));
346 if (ivlen > 0)
347 arc4random_buf(iv, ivlen);
348 if (EVP_CipherInit_ex(ctx, evp_cipher, NULL((void *)0), NULL((void *)0),
349 NULL((void *)0), 1) <= 0)
350 goto err;
351 if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0)
352 goto err;
353 if (EVP_CipherInit_ex(ctx, NULL((void *)0), NULL((void *)0), key, iv, 1) <= 0)
354 goto err;
355
356 if (ivlen > 0) {
357 if (xalg->parameter == NULL((void *)0)) {
358 xalg->parameter = ASN1_TYPE_new();
359 if (xalg->parameter == NULL((void *)0))
360 goto err;
361 }
362 if (EVP_CIPHER_param_to_asn1(ctx, xalg->parameter) < 0)
363 goto err;
364 }
365
366 /* Lets do the pub key stuff :-) */
367 for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk)sk_num(((_STACK*) (1 ? (rsk) : (struct stack_st_PKCS7_RECIP_INFO
*)0))); i++) {
368 ri = sk_PKCS7_RECIP_INFO_value(rsk, i)((PKCS7_RECIP_INFO *)sk_value(((_STACK*) (1 ? (rsk) : (struct
stack_st_PKCS7_RECIP_INFO*)0)), (i)));
369 if (pkcs7_encode_rinfo(ri, key, keylen) <= 0)
370 goto err;
371 }
372 explicit_bzero(key, keylen);
373
374 if (out == NULL((void *)0))
375 out = btmp;
376 else
377 BIO_push(out, btmp);
378 btmp = NULL((void *)0);
379 }
380
381 if (bio == NULL((void *)0)) {
382 if (PKCS7_is_detached(p7)((OBJ_obj2nid((p7)->type) == 22) && PKCS7_ctrl(p7,
2,0,((void *)0))))
383 bio = BIO_new(BIO_s_null());
384 else if (os && os->length > 0)
385 bio = BIO_new_mem_buf(os->data, os->length);
386 if (bio == NULL((void *)0)) {
387 bio = BIO_new(BIO_s_mem());
388 if (bio == NULL((void *)0))
389 goto err;
390 BIO_set_mem_eof_return(bio, 0)BIO_ctrl(bio,130,0,((void *)0));
391 }
392 }
393 if (out)
394 BIO_push(out, bio);
395 else
396 out = bio;
397 bio = NULL((void *)0);
398 if (0) {
399err:
400 if (out != NULL((void *)0))
401 BIO_free_all(out);
402 if (btmp != NULL((void *)0))
403 BIO_free_all(btmp);
404 out = NULL((void *)0);
405 }
406 return out;
407}
408LCRYPTO_ALIAS(PKCS7_dataInit)asm("");
409
410static int
411pkcs7_cmp_ri(PKCS7_RECIP_INFO *ri, X509 *pcert)
412{
413 int ret;
414
415 ret = X509_NAME_cmp(ri->issuer_and_serial->issuer,
416 pcert->cert_info->issuer);
417 if (ret)
418 return ret;
419 return ASN1_INTEGER_cmp(pcert->cert_info->serialNumber,
420 ri->issuer_and_serial->serial);
421}
422
423/* int */
424BIO *
425PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio, X509 *pcert)
426{
427 int i, j;
428 BIO *out = NULL((void *)0), *btmp = NULL((void *)0), *etmp = NULL((void *)0), *bio = NULL((void *)0);
429 X509_ALGOR *xa;
430 ASN1_OCTET_STRING *data_body = NULL((void *)0);
431 const EVP_MD *evp_md;
432 const EVP_CIPHER *evp_cipher = NULL((void *)0);
433 EVP_CIPHER_CTX *evp_ctx = NULL((void *)0);
434 X509_ALGOR *enc_alg = NULL((void *)0);
435 STACK_OF(X509_ALGOR)struct stack_st_X509_ALGOR *md_sk = NULL((void *)0);
436 STACK_OF(PKCS7_RECIP_INFO)struct stack_st_PKCS7_RECIP_INFO *rsk = NULL((void *)0);
437 PKCS7_RECIP_INFO *ri = NULL((void *)0);
438 unsigned char *ek = NULL((void *)0), *tkey = NULL((void *)0);
439 int eklen = 0, tkeylen = 0;
440
441 if (p7 == NULL((void *)0)) {
442 PKCS7error(PKCS7_R_INVALID_NULL_POINTER)ERR_put_error(33,(0xfff),(143),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,442);
443 return NULL((void *)0);
444 }
445
446 if (p7->d.ptr == NULL((void *)0)) {
447 PKCS7error(PKCS7_R_NO_CONTENT)ERR_put_error(33,(0xfff),(122),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,447);
448 return NULL((void *)0);
449 }
450
451 i = OBJ_obj2nid(p7->type);
452 p7->state = PKCS7_S_HEADER0;
453
454 switch (i) {
455 case NID_pkcs7_signed22:
456 data_body = PKCS7_get_octet_string(p7->d.sign->contents);
457 md_sk = p7->d.sign->md_algs;
458 break;
459 case NID_pkcs7_signedAndEnveloped24:
460 rsk = p7->d.signed_and_enveloped->recipientinfo;
461 md_sk = p7->d.signed_and_enveloped->md_algs;
462 data_body = p7->d.signed_and_enveloped->enc_data->enc_data;
463 enc_alg = p7->d.signed_and_enveloped->enc_data->algorithm;
464 evp_cipher = EVP_get_cipherbyobj(enc_alg->algorithm)EVP_get_cipherbyname(OBJ_nid2sn(OBJ_obj2nid(enc_alg->algorithm
)));
465 if (evp_cipher == NULL((void *)0)) {
466 PKCS7error(PKCS7_R_UNSUPPORTED_CIPHER_TYPE)ERR_put_error(33,(0xfff),(111),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,466);
467 goto err;
468 }
469 break;
470 case NID_pkcs7_enveloped23:
471 rsk = p7->d.enveloped->recipientinfo;
472 enc_alg = p7->d.enveloped->enc_data->algorithm;
473 data_body = p7->d.enveloped->enc_data->enc_data;
474 evp_cipher = EVP_get_cipherbyobj(enc_alg->algorithm)EVP_get_cipherbyname(OBJ_nid2sn(OBJ_obj2nid(enc_alg->algorithm
)));
475 if (evp_cipher == NULL((void *)0)) {
476 PKCS7error(PKCS7_R_UNSUPPORTED_CIPHER_TYPE)ERR_put_error(33,(0xfff),(111),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,476);
477 goto err;
478 }
479 break;
480 default:
481 PKCS7error(PKCS7_R_UNSUPPORTED_CONTENT_TYPE)ERR_put_error(33,(0xfff),(112),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,481);
482 goto err;
483 }
484
485 /* We will be checking the signature */
486 if (md_sk != NULL((void *)0)) {
487 for (i = 0; i < sk_X509_ALGOR_num(md_sk)sk_num(((_STACK*) (1 ? (md_sk) : (struct stack_st_X509_ALGOR*
)0))); i++) {
488 xa = sk_X509_ALGOR_value(md_sk, i)((X509_ALGOR *)sk_value(((_STACK*) (1 ? (md_sk) : (struct stack_st_X509_ALGOR
*)0)), (i)));
489 if ((btmp = BIO_new(BIO_f_md())) == NULL((void *)0)) {
490 PKCS7error(ERR_R_BIO_LIB)ERR_put_error(33,(0xfff),(32),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,490);
491 goto err;
492 }
493
494 j = OBJ_obj2nid(xa->algorithm);
495 evp_md = EVP_get_digestbynid(j)EVP_get_digestbyname(OBJ_nid2sn(j));
496 if (evp_md == NULL((void *)0)) {
497 PKCS7error(PKCS7_R_UNKNOWN_DIGEST_TYPE)ERR_put_error(33,(0xfff),(109),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,497);
498 goto err;
499 }
500
501 if (BIO_set_md(btmp, evp_md)BIO_ctrl(btmp,111,0,(char *)evp_md) <= 0) {
502 PKCS7error(ERR_R_BIO_LIB)ERR_put_error(33,(0xfff),(32),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,502);
503 goto err;
504 }
505 if (out == NULL((void *)0))
506 out = btmp;
507 else
508 BIO_push(out, btmp);
509 btmp = NULL((void *)0);
510 }
511 }
512
513 if (evp_cipher != NULL((void *)0)) {
514 if ((etmp = BIO_new(BIO_f_cipher())) == NULL((void *)0)) {
515 PKCS7error(ERR_R_BIO_LIB)ERR_put_error(33,(0xfff),(32),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,515);
516 goto err;
517 }
518
519 /* It was encrypted, we need to decrypt the secret key
520 * with the private key */
521
522 /* Find the recipientInfo which matches the passed certificate
523 * (if any)
524 */
525 if (pcert) {
526 for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk)sk_num(((_STACK*) (1 ? (rsk) : (struct stack_st_PKCS7_RECIP_INFO
*)0))); i++) {
527 ri = sk_PKCS7_RECIP_INFO_value(rsk, i)((PKCS7_RECIP_INFO *)sk_value(((_STACK*) (1 ? (rsk) : (struct
stack_st_PKCS7_RECIP_INFO*)0)), (i)));
528 if (!pkcs7_cmp_ri(ri, pcert))
529 break;
530 ri = NULL((void *)0);
531 }
532 if (ri == NULL((void *)0)) {
533 PKCS7error(PKCS7_R_NO_RECIPIENT_MATCHES_CERTIFICATE)ERR_put_error(33,(0xfff),(115),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,533);
534 goto err;
535 }
536 }
537
538 /* If we haven't got a certificate try each ri in turn */
539 if (pcert == NULL((void *)0)) {
540 /* Always attempt to decrypt all rinfo even
541 * after success as a defence against MMA timing
542 * attacks.
543 */
544 for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk)sk_num(((_STACK*) (1 ? (rsk) : (struct stack_st_PKCS7_RECIP_INFO
*)0))); i++) {
545 ri = sk_PKCS7_RECIP_INFO_value(rsk, i)((PKCS7_RECIP_INFO *)sk_value(((_STACK*) (1 ? (rsk) : (struct
stack_st_PKCS7_RECIP_INFO*)0)), (i)));
546
547 if (pkcs7_decrypt_rinfo(&ek, &eklen, ri, pkey,
548 EVP_CIPHER_key_length(evp_cipher)) < 0)
549 goto err;
550 ERR_clear_error();
551 }
552 } else {
553 /* Only exit on fatal errors, not decrypt failure */
554 if (pkcs7_decrypt_rinfo(&ek, &eklen, ri, pkey, 0) < 0)
555 goto err;
556 ERR_clear_error();
557 }
558
559 evp_ctx = NULL((void *)0);
560 BIO_get_cipher_ctx(etmp, &evp_ctx)BIO_ctrl(etmp,129,0,(char *)&evp_ctx);
561 if (EVP_CipherInit_ex(evp_ctx, evp_cipher, NULL((void *)0), NULL((void *)0),
562 NULL((void *)0), 0) <= 0)
563 goto err;
564 if (EVP_CIPHER_asn1_to_param(evp_ctx, enc_alg->parameter) < 0)
565 goto err;
566 /* Generate random key as MMA defence */
567 tkeylen = EVP_CIPHER_CTX_key_length(evp_ctx);
568 tkey = malloc(tkeylen);
569 if (!tkey)
570 goto err;
571 if (EVP_CIPHER_CTX_rand_key(evp_ctx, tkey) <= 0)
572 goto err;
573 if (ek == NULL((void *)0)) {
574 ek = tkey;
575 eklen = tkeylen;
576 tkey = NULL((void *)0);
577 }
578
579 if (eklen != EVP_CIPHER_CTX_key_length(evp_ctx)) {
580 /* Some S/MIME clients don't use the same key
581 * and effective key length. The key length is
582 * determined by the size of the decrypted RSA key.
583 */
584 if (!EVP_CIPHER_CTX_set_key_length(evp_ctx, eklen)) {
585 /* Use random key as MMA defence */
586 freezero(ek, eklen);
587 ek = tkey;
588 eklen = tkeylen;
589 tkey = NULL((void *)0);
590 }
591 }
592 /* Clear errors so we don't leak information useful in MMA */
593 ERR_clear_error();
594 if (EVP_CipherInit_ex(evp_ctx, NULL((void *)0), NULL((void *)0), ek, NULL((void *)0), 0) <= 0)
595 goto err;
596
597 freezero(ek, eklen);
598 ek = NULL((void *)0);
599 freezero(tkey, tkeylen);
600 tkey = NULL((void *)0);
601
602 if (out == NULL((void *)0))
603 out = etmp;
604 else
605 BIO_push(out, etmp);
606 etmp = NULL((void *)0);
607 }
608
609 if (PKCS7_is_detached(p7)((OBJ_obj2nid((p7)->type) == 22) && PKCS7_ctrl(p7,
2,0,((void *)0))) || (in_bio != NULL((void *)0))) {
610 bio = in_bio;
611 } else {
612 if (data_body != NULL((void *)0) && data_body->length > 0)
613 bio = BIO_new_mem_buf(data_body->data, data_body->length);
614 else {
615 bio = BIO_new(BIO_s_mem());
616 BIO_set_mem_eof_return(bio, 0)BIO_ctrl(bio,130,0,((void *)0));
617 }
618 if (bio == NULL((void *)0))
619 goto err;
620 }
621 BIO_push(out, bio);
622
623 if (0) {
624err:
625 freezero(ek, eklen);
626 freezero(tkey, tkeylen);
627 if (out != NULL((void *)0))
628 BIO_free_all(out);
629 if (btmp != NULL((void *)0))
630 BIO_free_all(btmp);
631 if (etmp != NULL((void *)0))
632 BIO_free_all(etmp);
633 out = NULL((void *)0);
634 }
635 return out;
636}
637LCRYPTO_ALIAS(PKCS7_dataDecode)asm("");
638
639static BIO *
640PKCS7_find_digest(EVP_MD_CTX **pmd, BIO *bio, int nid)
641{
642 for (;;) {
643 bio = BIO_find_type(bio, BIO_TYPE_MD(8|0x0200));
644 if (bio == NULL((void *)0)) {
645 PKCS7error(PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST)ERR_put_error(33,(0xfff),(108),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,645);
646 return NULL((void *)0);
647 }
648 BIO_get_md_ctx(bio, pmd)BIO_ctrl(bio,120,0,(char *)pmd);
649 if (*pmd == NULL((void *)0)) {
650 PKCS7error(ERR_R_INTERNAL_ERROR)ERR_put_error(33,(0xfff),((4|64)),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,650);
651 return NULL((void *)0);
652 }
653 if (EVP_MD_CTX_type(*pmd)EVP_MD_type(EVP_MD_CTX_md(*pmd)) == nid)
654 return bio;
655 bio = BIO_next(bio);
656 }
657 return NULL((void *)0);
658}
659
660static int
661do_pkcs7_signed_attrib(PKCS7_SIGNER_INFO *si, EVP_MD_CTX *mctx)
662{
663 unsigned char md_data[EVP_MAX_MD_SIZE64];
664 unsigned int md_len;
665
666 /* Add signing time if not already present */
667 if (!PKCS7_get_signed_attribute(si, NID_pkcs9_signingTime52)) {
668 if (!PKCS7_add0_attrib_signing_time(si, NULL((void *)0))) {
669 PKCS7error(ERR_R_MALLOC_FAILURE)ERR_put_error(33,(0xfff),((1|64)),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,669);
670 return 0;
671 }
672 }
673
674 /* Add digest */
675 if (!EVP_DigestFinal_ex(mctx, md_data, &md_len)) {
676 PKCS7error(ERR_R_EVP_LIB)ERR_put_error(33,(0xfff),(6),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,676);
677 return 0;
678 }
679 if (!PKCS7_add1_attrib_digest(si, md_data, md_len)) {
680 PKCS7error(ERR_R_MALLOC_FAILURE)ERR_put_error(33,(0xfff),((1|64)),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,680);
681 return 0;
682 }
683
684 /* Now sign the attributes */
685 if (!PKCS7_SIGNER_INFO_sign(si))
686 return 0;
687
688 return 1;
689}
690
691
692int
693PKCS7_dataFinal(PKCS7 *p7, BIO *bio)
694{
695 int ret = 0;
696 int i, j;
697 BIO *btmp;
698 PKCS7_SIGNER_INFO *si;
699 EVP_MD_CTX *mdc, ctx_tmp;
700 STACK_OF(X509_ATTRIBUTE)struct stack_st_X509_ATTRIBUTE *sk;
701 STACK_OF(PKCS7_SIGNER_INFO)struct stack_st_PKCS7_SIGNER_INFO *si_sk = NULL((void *)0);
702 ASN1_OCTET_STRING *os = NULL((void *)0);
703
704 if (p7 == NULL((void *)0)) {
705 PKCS7error(PKCS7_R_INVALID_NULL_POINTER)ERR_put_error(33,(0xfff),(143),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,705);
706 return 0;
707 }
708
709 if (p7->d.ptr == NULL((void *)0)) {
710 PKCS7error(PKCS7_R_NO_CONTENT)ERR_put_error(33,(0xfff),(122),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,710);
711 return 0;
712 }
713
714 EVP_MD_CTX_init(&ctx_tmp);
715 i = OBJ_obj2nid(p7->type);
716 p7->state = PKCS7_S_HEADER0;
717
718 switch (i) {
719 case NID_pkcs7_data21:
720 os = p7->d.data;
721 break;
722 case NID_pkcs7_signedAndEnveloped24:
723 /* XXX */
724 si_sk = p7->d.signed_and_enveloped->signer_info;
725 os = p7->d.signed_and_enveloped->enc_data->enc_data;
726 if (!os) {
727 os = ASN1_OCTET_STRING_new();
728 if (!os) {
729 PKCS7error(ERR_R_MALLOC_FAILURE)ERR_put_error(33,(0xfff),((1|64)),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,729);
730 goto err;
731 }
732 p7->d.signed_and_enveloped->enc_data->enc_data = os;
733 }
734 break;
735 case NID_pkcs7_enveloped23:
736 /* XXX */
737 os = p7->d.enveloped->enc_data->enc_data;
738 if (!os) {
739 os = ASN1_OCTET_STRING_new();
740 if (!os) {
741 PKCS7error(ERR_R_MALLOC_FAILURE)ERR_put_error(33,(0xfff),((1|64)),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,741);
742 goto err;
743 }
744 p7->d.enveloped->enc_data->enc_data = os;
745 }
746 break;
747 case NID_pkcs7_signed22:
748 si_sk = p7->d.sign->signer_info;
749 os = PKCS7_get_octet_string(p7->d.sign->contents);
750 if (!PKCS7_is_detached(p7)((OBJ_obj2nid((p7)->type) == 22) && PKCS7_ctrl(p7,
2,0,((void *)0))) && os == NULL((void *)0)) {
751 PKCS7error(PKCS7_R_DECODE_ERROR)ERR_put_error(33,(0xfff),(130),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,751);
752 goto err;
753 }
754 /* If detached data then the content is excluded */
755 if (PKCS7_type_is_data(p7->d.sign->contents)(OBJ_obj2nid((p7->d.sign->contents)->type) == 21) && p7->detached) {
756 ASN1_OCTET_STRING_free(os);
757 os = NULL((void *)0);
758 p7->d.sign->contents->d.data = NULL((void *)0);
759 }
760 break;
761
762 case NID_pkcs7_digest25:
763 os = PKCS7_get_octet_string(p7->d.digest->contents);
764 if (os == NULL((void *)0)) {
765 PKCS7error(PKCS7_R_DECODE_ERROR)ERR_put_error(33,(0xfff),(130),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,765);
766 goto err;
767 }
768 /* If detached data then the content is excluded */
769 if (PKCS7_type_is_data(p7->d.digest->contents)(OBJ_obj2nid((p7->d.digest->contents)->type) == 21) &&
770 p7->detached) {
771 ASN1_OCTET_STRING_free(os);
772 os = NULL((void *)0);
773 p7->d.digest->contents->d.data = NULL((void *)0);
774 }
775 break;
776
777 default:
778 PKCS7error(PKCS7_R_UNSUPPORTED_CONTENT_TYPE)ERR_put_error(33,(0xfff),(112),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,778);
779 goto err;
780 }
781
782 if (si_sk != NULL((void *)0)) {
783 for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(si_sk)sk_num(((_STACK*) (1 ? (si_sk) : (struct stack_st_PKCS7_SIGNER_INFO
*)0))); i++) {
784 si = sk_PKCS7_SIGNER_INFO_value(si_sk, i)((PKCS7_SIGNER_INFO *)sk_value(((_STACK*) (1 ? (si_sk) : (struct
stack_st_PKCS7_SIGNER_INFO*)0)), (i)));
785 if (si->pkey == NULL((void *)0))
786 continue;
787
788 j = OBJ_obj2nid(si->digest_alg->algorithm);
789
790 if ((btmp = PKCS7_find_digest(&mdc, bio, j)) == NULL((void *)0))
Although the value stored to 'btmp' is used in the enclosing expression, the value is never actually read from 'btmp'
791 goto err;
792
793 /* We now have the EVP_MD_CTX, lets do the
794 * signing. */
795 if (!EVP_MD_CTX_copy_ex(&ctx_tmp, mdc))
796 goto err;
797
798 sk = si->auth_attr;
799
800 /* If there are attributes, we add the digest
801 * attribute and only sign the attributes */
802 if (sk_X509_ATTRIBUTE_num(sk)sk_num(((_STACK*) (1 ? (sk) : (struct stack_st_X509_ATTRIBUTE
*)0))) > 0) {
803 if (!do_pkcs7_signed_attrib(si, &ctx_tmp))
804 goto err;
805 } else {
806 unsigned char *abuf = NULL((void *)0);
807 unsigned int abuflen;
808 abuflen = EVP_PKEY_size(si->pkey);
809 abuf = malloc(abuflen);
810 if (!abuf)
811 goto err;
812
813 if (!EVP_SignFinal(&ctx_tmp, abuf, &abuflen,
814 si->pkey)) {
815 PKCS7error(ERR_R_EVP_LIB)ERR_put_error(33,(0xfff),(6),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,815);
816 goto err;
817 }
818 ASN1_STRING_set0(si->enc_digest, abuf, abuflen);
819 }
820 }
821 } else if (i == NID_pkcs7_digest25) {
822 unsigned char md_data[EVP_MAX_MD_SIZE64];
823 unsigned int md_len;
824
825 if (!PKCS7_find_digest(&mdc, bio,
826 OBJ_obj2nid(p7->d.digest->md->algorithm)))
827 goto err;
828 if (!EVP_DigestFinal_ex(mdc, md_data, &md_len))
829 goto err;
830 if (ASN1_STRING_set(p7->d.digest->digest, md_data,
831 md_len) == 0)
832 goto err;
833 }
834
835 if (!PKCS7_is_detached(p7)((OBJ_obj2nid((p7)->type) == 22) && PKCS7_ctrl(p7,
2,0,((void *)0)))) {
836 /*
837 * NOTE: only reach os == NULL here because detached
838 * digested data support is broken?
839 */
840 if (os == NULL((void *)0))
841 goto err;
842 if (!(os->flags & ASN1_STRING_FLAG_NDEF0x010)) {
843 char *cont;
844 long contlen;
845
846 btmp = BIO_find_type(bio, BIO_TYPE_MEM(1|0x0400));
847 if (btmp == NULL((void *)0)) {
848 PKCS7error(PKCS7_R_UNABLE_TO_FIND_MEM_BIO)ERR_put_error(33,(0xfff),(107),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,848);
849 goto err;
850 }
851 contlen = BIO_get_mem_data(btmp, &cont)BIO_ctrl(btmp,3,0,(char *)&cont);
852 /*
853 * Mark the BIO read only then we can use its copy
854 * of the data instead of making an extra copy.
855 */
856 BIO_set_flags(btmp, BIO_FLAGS_MEM_RDONLY0x200);
857 BIO_set_mem_eof_return(btmp, 0)BIO_ctrl(btmp,130,0,((void *)0));
858 ASN1_STRING_set0(os, (unsigned char *)cont, contlen);
859 }
860 }
861 ret = 1;
862err:
863 EVP_MD_CTX_cleanup(&ctx_tmp);
864 return ret;
865}
866LCRYPTO_ALIAS(PKCS7_dataFinal)asm("");
867
868int
869PKCS7_SIGNER_INFO_sign(PKCS7_SIGNER_INFO *si)
870{
871 EVP_MD_CTX mctx;
872 EVP_PKEY_CTX *pctx;
873 unsigned char *abuf = NULL((void *)0);
874 int alen;
875 size_t siglen;
876 const EVP_MD *md = NULL((void *)0);
877
878 md = EVP_get_digestbyobj(si->digest_alg->algorithm)EVP_get_digestbyname(OBJ_nid2sn(OBJ_obj2nid(si->digest_alg
->algorithm)));
879 if (md == NULL((void *)0))
880 return 0;
881
882 EVP_MD_CTX_init(&mctx);
883 if (EVP_DigestSignInit(&mctx, &pctx, md, NULL((void *)0), si->pkey) <= 0)
884 goto err;
885
886 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN(1<<3),
887 EVP_PKEY_CTRL_PKCS7_SIGN5, 0, si) <= 0) {
888 PKCS7error(PKCS7_R_CTRL_ERROR)ERR_put_error(33,(0xfff),(152),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,888);
889 goto err;
890 }
891
892 alen = ASN1_item_i2d((ASN1_VALUE *)si->auth_attr, &abuf,
893 &PKCS7_ATTR_SIGN_it);
894 if (!abuf)
895 goto err;
896 if (EVP_DigestSignUpdate(&mctx, abuf, alen)EVP_DigestUpdate(&mctx,abuf,alen) <= 0)
897 goto err;
898 free(abuf);
899 abuf = NULL((void *)0);
900 if (EVP_DigestSignFinal(&mctx, NULL((void *)0), &siglen) <= 0)
901 goto err;
902 abuf = malloc(siglen);
903 if (!abuf)
904 goto err;
905 if (EVP_DigestSignFinal(&mctx, abuf, &siglen) <= 0)
906 goto err;
907
908 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN(1<<3),
909 EVP_PKEY_CTRL_PKCS7_SIGN5, 1, si) <= 0) {
910 PKCS7error(PKCS7_R_CTRL_ERROR)ERR_put_error(33,(0xfff),(152),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,910);
911 goto err;
912 }
913
914 EVP_MD_CTX_cleanup(&mctx);
915
916 ASN1_STRING_set0(si->enc_digest, abuf, siglen);
917
918 return 1;
919
920err:
921 free(abuf);
922 EVP_MD_CTX_cleanup(&mctx);
923 return 0;
924}
925LCRYPTO_ALIAS(PKCS7_SIGNER_INFO_sign)asm("");
926
927int
928PKCS7_dataVerify(X509_STORE *cert_store, X509_STORE_CTX *ctx, BIO *bio,
929 PKCS7 *p7, PKCS7_SIGNER_INFO *si)
930{
931 PKCS7_ISSUER_AND_SERIAL *ias;
932 int ret = 0, i;
933 STACK_OF(X509)struct stack_st_X509 *cert;
934 X509 *x509;
935
936 if (p7 == NULL((void *)0)) {
937 PKCS7error(PKCS7_R_INVALID_NULL_POINTER)ERR_put_error(33,(0xfff),(143),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,937);
938 return 0;
939 }
940
941 if (p7->d.ptr == NULL((void *)0)) {
942 PKCS7error(PKCS7_R_NO_CONTENT)ERR_put_error(33,(0xfff),(122),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,942);
943 return 0;
944 }
945
946 if (PKCS7_type_is_signed(p7)(OBJ_obj2nid((p7)->type) == 22)) {
947 cert = p7->d.sign->cert;
948 } else if (PKCS7_type_is_signedAndEnveloped(p7)(OBJ_obj2nid((p7)->type) == 24)) {
949 cert = p7->d.signed_and_enveloped->cert;
950 } else {
951 PKCS7error(PKCS7_R_WRONG_PKCS7_TYPE)ERR_put_error(33,(0xfff),(114),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,951);
952 goto err;
953 }
954 /* XXXX */
955 ias = si->issuer_and_serial;
956
957 x509 = X509_find_by_issuer_and_serial(cert, ias->issuer, ias->serial);
958
959 /* were we able to find the cert in passed to us */
960 if (x509 == NULL((void *)0)) {
961 PKCS7error(PKCS7_R_UNABLE_TO_FIND_CERTIFICATE)ERR_put_error(33,(0xfff),(106),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,961);
962 goto err;
963 }
964
965 /* Lets verify */
966 if (!X509_STORE_CTX_init(ctx, cert_store, x509, cert)) {
967 PKCS7error(ERR_R_X509_LIB)ERR_put_error(33,(0xfff),(11),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,967);
968 goto err;
969 }
970 if (X509_STORE_CTX_set_purpose(ctx, X509_PURPOSE_SMIME_SIGN4) == 0) {
971 X509_STORE_CTX_cleanup(ctx);
972 goto err;
973 }
974 i = X509_verify_cert(ctx);
975 if (i <= 0) {
976 PKCS7error(ERR_R_X509_LIB)ERR_put_error(33,(0xfff),(11),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,976);
977 X509_STORE_CTX_cleanup(ctx);
978 goto err;
979 }
980 X509_STORE_CTX_cleanup(ctx);
981
982 return PKCS7_signatureVerify(bio, p7, si, x509);
983err:
984
985 return ret;
986}
987LCRYPTO_ALIAS(PKCS7_dataVerify)asm("");
988
989int
990PKCS7_signatureVerify(BIO *bio, PKCS7 *p7, PKCS7_SIGNER_INFO *si, X509 *x509)
991{
992 ASN1_OCTET_STRING *os;
993 EVP_MD_CTX mdc_tmp, *mdc;
994 int ret = 0, i;
995 int md_type;
996 STACK_OF(X509_ATTRIBUTE)struct stack_st_X509_ATTRIBUTE *sk;
997 BIO *btmp;
998 EVP_PKEY *pkey;
999
1000 EVP_MD_CTX_init(&mdc_tmp);
1001
1002 if (!PKCS7_type_is_signed(p7)(OBJ_obj2nid((p7)->type) == 22) &&
1003 !PKCS7_type_is_signedAndEnveloped(p7)(OBJ_obj2nid((p7)->type) == 24)) {
1004 PKCS7error(PKCS7_R_WRONG_PKCS7_TYPE)ERR_put_error(33,(0xfff),(114),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,1004);
1005 goto err;
1006 }
1007
1008 md_type = OBJ_obj2nid(si->digest_alg->algorithm);
1009
1010 btmp = bio;
1011 for (;;) {
1012 if ((btmp == NULL((void *)0)) ||
1013 ((btmp = BIO_find_type(btmp, BIO_TYPE_MD(8|0x0200))) == NULL((void *)0))) {
1014 PKCS7error(PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST)ERR_put_error(33,(0xfff),(108),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,1014);
1015 goto err;
1016 }
1017 BIO_get_md_ctx(btmp, &mdc)BIO_ctrl(btmp,120,0,(char *)&mdc);
1018 if (mdc == NULL((void *)0)) {
1019 PKCS7error(ERR_R_INTERNAL_ERROR)ERR_put_error(33,(0xfff),((4|64)),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,1019);
1020 goto err;
1021 }
1022 if (EVP_MD_CTX_type(mdc)EVP_MD_type(EVP_MD_CTX_md(mdc)) == md_type)
1023 break;
1024 /* Workaround for some broken clients that put the signature
1025 * OID instead of the digest OID in digest_alg->algorithm
1026 */
1027 if (EVP_MD_pkey_type(EVP_MD_CTX_md(mdc)) == md_type)
1028 break;
1029 btmp = BIO_next(btmp);
1030 }
1031
1032 /* mdc is the digest ctx that we want, unless there are attributes,
1033 * in which case the digest is the signed attributes */
1034 if (!EVP_MD_CTX_copy_ex(&mdc_tmp, mdc))
1035 goto err;
1036
1037 sk = si->auth_attr;
1038 if ((sk != NULL((void *)0)) && (sk_X509_ATTRIBUTE_num(sk)sk_num(((_STACK*) (1 ? (sk) : (struct stack_st_X509_ATTRIBUTE
*)0))) != 0)) {
1039 unsigned char md_dat[EVP_MAX_MD_SIZE64], *abuf = NULL((void *)0);
1040 unsigned int md_len;
1041 int alen;
1042 ASN1_OCTET_STRING *message_digest;
1043
1044 if (!EVP_DigestFinal_ex(&mdc_tmp, md_dat, &md_len))
1045 goto err;
1046 message_digest = PKCS7_digest_from_attributes(sk);
1047 if (!message_digest) {
1048 PKCS7error(PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST)ERR_put_error(33,(0xfff),(108),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,1048);
1049 goto err;
1050 }
1051 if ((message_digest->length != (int)md_len) ||
1052 (memcmp(message_digest->data, md_dat, md_len))) {
1053 PKCS7error(PKCS7_R_DIGEST_FAILURE)ERR_put_error(33,(0xfff),(101),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,1053);
1054 ret = -1;
1055 goto err;
1056 }
1057
1058 if (!EVP_VerifyInit_ex(&mdc_tmp, EVP_get_digestbynid(md_type),EVP_DigestInit_ex(&mdc_tmp,EVP_get_digestbyname(OBJ_nid2sn
(md_type)),((void *)0))
1059 NULL)EVP_DigestInit_ex(&mdc_tmp,EVP_get_digestbyname(OBJ_nid2sn
(md_type)),((void *)0)))
1060 goto err;
1061
1062 alen = ASN1_item_i2d((ASN1_VALUE *)sk, &abuf,
1063 &PKCS7_ATTR_VERIFY_it);
1064 if (alen <= 0) {
1065 PKCS7error(ERR_R_ASN1_LIB)ERR_put_error(33,(0xfff),(13),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,1065);
1066 ret = -1;
1067 goto err;
1068 }
1069 if (!EVP_VerifyUpdate(&mdc_tmp, abuf, alen)EVP_DigestUpdate(&mdc_tmp,abuf,alen))
1070 goto err;
1071
1072 free(abuf);
1073 }
1074
1075 os = si->enc_digest;
1076 pkey = X509_get_pubkey(x509);
1077 if (!pkey) {
1078 ret = -1;
1079 goto err;
1080 }
1081
1082 i = EVP_VerifyFinal(&mdc_tmp, os->data, os->length, pkey);
1083 EVP_PKEY_free(pkey);
1084 if (i <= 0) {
1085 PKCS7error(PKCS7_R_SIGNATURE_FAILURE)ERR_put_error(33,(0xfff),(105),"/usr/src/lib/libcrypto/pkcs7/pk7_doit.c"
,1085);
1086 ret = -1;
1087 goto err;
1088 } else
1089 ret = 1;
1090err:
1091 EVP_MD_CTX_cleanup(&mdc_tmp);
1092 return ret;
1093}
1094LCRYPTO_ALIAS(PKCS7_signatureVerify)asm("");
1095
1096PKCS7_ISSUER_AND_SERIAL *
1097PKCS7_get_issuer_and_serial(PKCS7 *p7, int idx)
1098{
1099 STACK_OF(PKCS7_RECIP_INFO)struct stack_st_PKCS7_RECIP_INFO *rsk;
1100 PKCS7_RECIP_INFO *ri;
1101 int i;
1102
1103 i = OBJ_obj2nid(p7->type);
1104 if (i != NID_pkcs7_signedAndEnveloped24)
1105 return NULL((void *)0);
1106 if (p7->d.signed_and_enveloped == NULL((void *)0))
1107 return NULL((void *)0);
1108 rsk = p7->d.signed_and_enveloped->recipientinfo;
1109 if (rsk == NULL((void *)0))
1110 return NULL((void *)0);
1111 ri = sk_PKCS7_RECIP_INFO_value(rsk, 0)((PKCS7_RECIP_INFO *)sk_value(((_STACK*) (1 ? (rsk) : (struct
stack_st_PKCS7_RECIP_INFO*)0)), (0)));
1112 if (sk_PKCS7_RECIP_INFO_num(rsk)sk_num(((_STACK*) (1 ? (rsk) : (struct stack_st_PKCS7_RECIP_INFO
*)0))) <= idx)
1113 return NULL((void *)0);
1114 ri = sk_PKCS7_RECIP_INFO_value(rsk, idx)((PKCS7_RECIP_INFO *)sk_value(((_STACK*) (1 ? (rsk) : (struct
stack_st_PKCS7_RECIP_INFO*)0)), (idx)));
1115 return ri->issuer_and_serial;
1116}
1117LCRYPTO_ALIAS(PKCS7_get_issuer_and_serial)asm("");
1118
1119static ASN1_TYPE *
1120get_attribute(STACK_OF(X509_ATTRIBUTE)struct stack_st_X509_ATTRIBUTE *sk, int nid)
1121{
1122 int i;
1123 X509_ATTRIBUTE *xa;
1124 ASN1_OBJECT *o;
1125
1126 o = OBJ_nid2obj(nid);
1127 if (!o || !sk)
1128 return NULL((void *)0);
1129 for (i = 0; i < sk_X509_ATTRIBUTE_num(sk)sk_num(((_STACK*) (1 ? (sk) : (struct stack_st_X509_ATTRIBUTE
*)0))); i++) {
1130 xa = sk_X509_ATTRIBUTE_value(sk, i)((X509_ATTRIBUTE *)sk_value(((_STACK*) (1 ? (sk) : (struct stack_st_X509_ATTRIBUTE
*)0)), (i)));
1131 if (OBJ_cmp(xa->object, o) == 0)
1132 return sk_ASN1_TYPE_value(xa->set, 0)((ASN1_TYPE *)sk_value(((_STACK*) (1 ? (xa->set) : (struct
stack_st_ASN1_TYPE*)0)), (0)));
1133 }
1134 return NULL((void *)0);
1135}
1136
1137ASN1_TYPE *
1138PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO *si, int nid)
1139{
1140 return get_attribute(si->auth_attr, nid);
1141}
1142LCRYPTO_ALIAS(PKCS7_get_signed_attribute)asm("");
1143
1144ASN1_TYPE *
1145PKCS7_get_attribute(PKCS7_SIGNER_INFO *si, int nid)
1146{
1147 return get_attribute(si->unauth_attr, nid);
1148}
1149LCRYPTO_ALIAS(PKCS7_get_attribute)asm("");
1150
1151ASN1_OCTET_STRING *
1152PKCS7_digest_from_attributes(STACK_OF(X509_ATTRIBUTE)struct stack_st_X509_ATTRIBUTE *sk)
1153{
1154 ASN1_TYPE *astype;
1155
1156 if (!(astype = get_attribute(sk, NID_pkcs9_messageDigest51)))
1157 return NULL((void *)0);
1158 if (astype->type != V_ASN1_OCTET_STRING4)
1159 return NULL((void *)0);
1160 return astype->value.octet_string;
1161}
1162LCRYPTO_ALIAS(PKCS7_digest_from_attributes)asm("");
1163
1164int
1165PKCS7_set_signed_attributes(PKCS7_SIGNER_INFO *p7si,
1166 STACK_OF(X509_ATTRIBUTE)struct stack_st_X509_ATTRIBUTE *sk)
1167{
1168 int i;
1169
1170 if (p7si->auth_attr != NULL((void *)0))
1171 sk_X509_ATTRIBUTE_pop_free(p7si->auth_attr,sk_pop_free(((_STACK*) (1 ? (p7si->auth_attr) : (struct stack_st_X509_ATTRIBUTE
*)0)), ((void (*)(void *)) ((1 ? (X509_ATTRIBUTE_free) : (void
(*)(X509_ATTRIBUTE *))0))))
1172 X509_ATTRIBUTE_free)sk_pop_free(((_STACK*) (1 ? (p7si->auth_attr) : (struct stack_st_X509_ATTRIBUTE
*)0)), ((void (*)(void *)) ((1 ? (X509_ATTRIBUTE_free) : (void
(*)(X509_ATTRIBUTE *))0))));
1173 p7si->auth_attr = sk_X509_ATTRIBUTE_dup(sk)(struct stack_st_X509_ATTRIBUTE *)sk_dup(((_STACK*) (1 ? sk :
(struct stack_st_X509_ATTRIBUTE*)0)));
1174 if (p7si->auth_attr == NULL((void *)0))
1175 return 0;
1176 for (i = 0; i < sk_X509_ATTRIBUTE_num(sk)sk_num(((_STACK*) (1 ? (sk) : (struct stack_st_X509_ATTRIBUTE
*)0))); i++) {
1177 if ((sk_X509_ATTRIBUTE_set(p7si->auth_attr, i,sk_set(((_STACK*) (1 ? (p7si->auth_attr) : (struct stack_st_X509_ATTRIBUTE
*)0)), (i), ((void*) (1 ? (X509_ATTRIBUTE_dup(((X509_ATTRIBUTE
*)sk_value(((_STACK*) (1 ? (sk) : (struct stack_st_X509_ATTRIBUTE
*)0)), (i))))) : (X509_ATTRIBUTE*)0)))
1178 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value(sk, i)))sk_set(((_STACK*) (1 ? (p7si->auth_attr) : (struct stack_st_X509_ATTRIBUTE
*)0)), (i), ((void*) (1 ? (X509_ATTRIBUTE_dup(((X509_ATTRIBUTE
*)sk_value(((_STACK*) (1 ? (sk) : (struct stack_st_X509_ATTRIBUTE
*)0)), (i))))) : (X509_ATTRIBUTE*)0))))
1179 == NULL((void *)0))
1180 return 0;
1181 }
1182 return 1;
1183}
1184LCRYPTO_ALIAS(PKCS7_set_signed_attributes)asm("");
1185
1186int
1187PKCS7_set_attributes(PKCS7_SIGNER_INFO *p7si, STACK_OF(X509_ATTRIBUTE)struct stack_st_X509_ATTRIBUTE *sk)
1188{
1189 int i;
1190
1191 if (p7si->unauth_attr != NULL((void *)0))
1192 sk_X509_ATTRIBUTE_pop_free(p7si->unauth_attr,sk_pop_free(((_STACK*) (1 ? (p7si->unauth_attr) : (struct stack_st_X509_ATTRIBUTE
*)0)), ((void (*)(void *)) ((1 ? (X509_ATTRIBUTE_free) : (void
(*)(X509_ATTRIBUTE *))0))))
1193 X509_ATTRIBUTE_free)sk_pop_free(((_STACK*) (1 ? (p7si->unauth_attr) : (struct stack_st_X509_ATTRIBUTE
*)0)), ((void (*)(void *)) ((1 ? (X509_ATTRIBUTE_free) : (void
(*)(X509_ATTRIBUTE *))0))));
1194 p7si->unauth_attr = sk_X509_ATTRIBUTE_dup(sk)(struct stack_st_X509_ATTRIBUTE *)sk_dup(((_STACK*) (1 ? sk :
(struct stack_st_X509_ATTRIBUTE*)0)));
1195 if (p7si->unauth_attr == NULL((void *)0))
1196 return 0;
1197 for (i = 0; i < sk_X509_ATTRIBUTE_num(sk)sk_num(((_STACK*) (1 ? (sk) : (struct stack_st_X509_ATTRIBUTE
*)0))); i++) {
1198 if ((sk_X509_ATTRIBUTE_set(p7si->unauth_attr, i,sk_set(((_STACK*) (1 ? (p7si->unauth_attr) : (struct stack_st_X509_ATTRIBUTE
*)0)), (i), ((void*) (1 ? (X509_ATTRIBUTE_dup(((X509_ATTRIBUTE
*)sk_value(((_STACK*) (1 ? (sk) : (struct stack_st_X509_ATTRIBUTE
*)0)), (i))))) : (X509_ATTRIBUTE*)0)))
1199 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value(sk, i)))sk_set(((_STACK*) (1 ? (p7si->unauth_attr) : (struct stack_st_X509_ATTRIBUTE
*)0)), (i), ((void*) (1 ? (X509_ATTRIBUTE_dup(((X509_ATTRIBUTE
*)sk_value(((_STACK*) (1 ? (sk) : (struct stack_st_X509_ATTRIBUTE
*)0)), (i))))) : (X509_ATTRIBUTE*)0))))
1200 == NULL((void *)0))
1201 return 0;
1202 }
1203 return 1;
1204}
1205LCRYPTO_ALIAS(PKCS7_set_attributes)asm("");
1206
1207static int
1208add_attribute(STACK_OF(X509_ATTRIBUTE)struct stack_st_X509_ATTRIBUTE **sk, int nid, int atrtype, void *value)
1209{
1210 X509_ATTRIBUTE *attr = NULL((void *)0);
1211
1212 if (*sk == NULL((void *)0)) {
1213 *sk = sk_X509_ATTRIBUTE_new_null()((struct stack_st_X509_ATTRIBUTE *)sk_new_null());
1214 if (*sk == NULL((void *)0))
1215 return 0;
1216new_attrib:
1217 if (!(attr = X509_ATTRIBUTE_create(nid, atrtype, value)))
1218 return 0;
1219 if (!sk_X509_ATTRIBUTE_push(*sk, attr)sk_push(((_STACK*) (1 ? (*sk) : (struct stack_st_X509_ATTRIBUTE
*)0)), ((void*) (1 ? (attr) : (X509_ATTRIBUTE*)0)))) {
1220 X509_ATTRIBUTE_free(attr);
1221 return 0;
1222 }
1223 } else {
1224 int i;
1225
1226 for (i = 0; i < sk_X509_ATTRIBUTE_num(*sk)sk_num(((_STACK*) (1 ? (*sk) : (struct stack_st_X509_ATTRIBUTE
*)0))); i++) {
1227 attr = sk_X509_ATTRIBUTE_value(*sk, i)((X509_ATTRIBUTE *)sk_value(((_STACK*) (1 ? (*sk) : (struct stack_st_X509_ATTRIBUTE
*)0)), (i)));
1228 if (OBJ_obj2nid(attr->object) == nid) {
1229 X509_ATTRIBUTE_free(attr);
1230 attr = X509_ATTRIBUTE_create(nid, atrtype,
1231 value);
1232 if (attr == NULL((void *)0))
1233 return 0;
1234 if (!sk_X509_ATTRIBUTE_set(*sk, i, attr)sk_set(((_STACK*) (1 ? (*sk) : (struct stack_st_X509_ATTRIBUTE
*)0)), (i), ((void*) (1 ? (attr) : (X509_ATTRIBUTE*)0)))) {
1235 X509_ATTRIBUTE_free(attr);
1236 return 0;
1237 }
1238 goto end;
1239 }
1240 }
1241 goto new_attrib;
1242 }
1243end:
1244 return 1;
1245}
1246
1247int
1248PKCS7_add_signed_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
1249 void *value)
1250{
1251 return add_attribute(&(p7si->auth_attr), nid, atrtype, value);
1252}
1253LCRYPTO_ALIAS(PKCS7_add_signed_attribute)asm("");
1254
1255int
1256PKCS7_add_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype, void *value)
1257{
1258 return add_attribute(&(p7si->unauth_attr), nid, atrtype, value);
1259}
1260LCRYPTO_ALIAS(PKCS7_add_attribute)asm("");