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d02b48c6 | 1 | /* crypto/pkcs7/pk7_doit.c */ |
58964a49 | 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
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 "cryptlib.h" | |
ec577822 BM |
61 | #include <openssl/rand.h> |
62 | #include <openssl/objects.h> | |
63 | #include <openssl/x509.h> | |
d02b48c6 | 64 | |
c8b41850 | 65 | static int add_attribute(STACK **sk, int nid, int atrtype, void *value); |
dfeab068 RE |
66 | static ASN1_TYPE *get_attribute(STACK *sk, int nid); |
67 | ||
6b691a5c | 68 | BIO *PKCS7_dataInit(PKCS7 *p7, BIO *bio) |
d02b48c6 RE |
69 | { |
70 | int i,j; | |
dfeab068 | 71 | BIO *out=NULL,*btmp=NULL; |
d02b48c6 | 72 | X509_ALGOR *xa; |
e778802f BL |
73 | const EVP_MD *evp_md; |
74 | const EVP_CIPHER *evp_cipher=NULL; | |
58964a49 RE |
75 | STACK *md_sk=NULL,*rsk=NULL; |
76 | X509_ALGOR *xalg=NULL; | |
77 | PKCS7_RECIP_INFO *ri=NULL; | |
78 | EVP_PKEY *pkey; | |
d02b48c6 RE |
79 | |
80 | i=OBJ_obj2nid(p7->type); | |
81 | p7->state=PKCS7_S_HEADER; | |
82 | ||
83 | switch (i) | |
84 | { | |
85 | case NID_pkcs7_signed: | |
58964a49 RE |
86 | md_sk=p7->d.sign->md_algs; |
87 | break; | |
88 | case NID_pkcs7_signedAndEnveloped: | |
89 | rsk=p7->d.signed_and_enveloped->recipientinfo; | |
90 | md_sk=p7->d.signed_and_enveloped->md_algs; | |
84fa704c DSH |
91 | xalg=p7->d.signed_and_enveloped->enc_data->algorithm; |
92 | evp_cipher=p7->d.signed_and_enveloped->enc_data->cipher; | |
58964a49 | 93 | if (evp_cipher == NULL) |
d02b48c6 | 94 | { |
84fa704c DSH |
95 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, |
96 | PKCS7_R_CIPHER_NOT_INITIALIZED); | |
58964a49 RE |
97 | goto err; |
98 | } | |
58964a49 | 99 | break; |
dfeab068 RE |
100 | case NID_pkcs7_enveloped: |
101 | rsk=p7->d.enveloped->recipientinfo; | |
84fa704c DSH |
102 | xalg=p7->d.enveloped->enc_data->algorithm; |
103 | evp_cipher=p7->d.enveloped->enc_data->cipher; | |
dfeab068 RE |
104 | if (evp_cipher == NULL) |
105 | { | |
84fa704c DSH |
106 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, |
107 | PKCS7_R_CIPHER_NOT_INITIALIZED); | |
dfeab068 RE |
108 | goto err; |
109 | } | |
dfeab068 | 110 | break; |
58964a49 RE |
111 | default: |
112 | PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE); | |
113 | goto err; | |
114 | } | |
115 | ||
116 | if (md_sk != NULL) | |
117 | { | |
118 | for (i=0; i<sk_num(md_sk); i++) | |
119 | { | |
120 | xa=(X509_ALGOR *)sk_value(md_sk,i); | |
dfeab068 RE |
121 | if ((btmp=BIO_new(BIO_f_md())) == NULL) |
122 | { | |
123 | PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_BIO_LIB); | |
124 | goto err; | |
125 | } | |
d02b48c6 RE |
126 | |
127 | j=OBJ_obj2nid(xa->algorithm); | |
128 | evp_md=EVP_get_digestbyname(OBJ_nid2sn(j)); | |
129 | if (evp_md == NULL) | |
130 | { | |
131 | PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNKNOWN_DIGEST_TYPE); | |
132 | goto err; | |
133 | } | |
134 | ||
135 | BIO_set_md(btmp,evp_md); | |
136 | if (out == NULL) | |
137 | out=btmp; | |
138 | else | |
139 | BIO_push(out,btmp); | |
dfeab068 | 140 | btmp=NULL; |
d02b48c6 | 141 | } |
d02b48c6 | 142 | } |
58964a49 RE |
143 | |
144 | if (evp_cipher != NULL) | |
145 | { | |
146 | unsigned char key[EVP_MAX_KEY_LENGTH]; | |
147 | unsigned char iv[EVP_MAX_IV_LENGTH]; | |
148 | int keylen,ivlen; | |
149 | int jj,max; | |
150 | unsigned char *tmp; | |
84fa704c | 151 | EVP_CIPHER_CTX *ctx; |
58964a49 | 152 | |
dfeab068 RE |
153 | if ((btmp=BIO_new(BIO_f_cipher())) == NULL) |
154 | { | |
155 | PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_BIO_LIB); | |
156 | goto err; | |
157 | } | |
84fa704c | 158 | BIO_get_cipher_ctx(btmp, &ctx); |
58964a49 RE |
159 | keylen=EVP_CIPHER_key_length(evp_cipher); |
160 | ivlen=EVP_CIPHER_iv_length(evp_cipher); | |
84fa704c DSH |
161 | RAND_bytes(key,keylen); |
162 | EVP_CipherInit(ctx, evp_cipher, key, iv, 1); | |
163 | memset(key, 0, keylen); | |
164 | xalg->algorithm = OBJ_nid2obj(EVP_CIPHER_type(evp_cipher)); | |
58964a49 | 165 | |
884e8ec6 | 166 | if (ivlen > 0) { |
84fa704c | 167 | RAND_bytes(iv,ivlen); |
884e8ec6 DSH |
168 | if (xalg->parameter == NULL) |
169 | xalg->parameter=ASN1_TYPE_new(); | |
170 | if(EVP_CIPHER_param_to_asn1(ctx, xalg->parameter) < 0) | |
171 | goto err; | |
172 | } | |
58964a49 RE |
173 | |
174 | /* Lets do the pub key stuff :-) */ | |
175 | max=0; | |
176 | for (i=0; i<sk_num(rsk); i++) | |
177 | { | |
178 | ri=(PKCS7_RECIP_INFO *)sk_value(rsk,i); | |
dfeab068 RE |
179 | if (ri->cert == NULL) |
180 | { | |
181 | PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_MISSING_CERIPEND_INFO); | |
182 | goto err; | |
183 | } | |
58964a49 RE |
184 | pkey=X509_get_pubkey(ri->cert); |
185 | jj=EVP_PKEY_size(pkey); | |
924acc54 | 186 | EVP_PKEY_free(pkey); |
58964a49 RE |
187 | if (max < jj) max=jj; |
188 | } | |
dfeab068 RE |
189 | if ((tmp=(unsigned char *)Malloc(max)) == NULL) |
190 | { | |
191 | PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_MALLOC_FAILURE); | |
192 | goto err; | |
193 | } | |
58964a49 RE |
194 | for (i=0; i<sk_num(rsk); i++) |
195 | { | |
196 | ri=(PKCS7_RECIP_INFO *)sk_value(rsk,i); | |
197 | pkey=X509_get_pubkey(ri->cert); | |
198 | jj=EVP_PKEY_encrypt(tmp,key,keylen,pkey); | |
924acc54 | 199 | EVP_PKEY_free(pkey); |
dfeab068 RE |
200 | if (jj <= 0) |
201 | { | |
202 | PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_EVP_LIB); | |
203 | Free(tmp); | |
204 | goto err; | |
205 | } | |
58964a49 RE |
206 | ASN1_OCTET_STRING_set(ri->enc_key,tmp,jj); |
207 | } | |
dfeab068 | 208 | Free(tmp); |
58964a49 | 209 | |
58964a49 RE |
210 | if (out == NULL) |
211 | out=btmp; | |
212 | else | |
213 | BIO_push(out,btmp); | |
dfeab068 | 214 | btmp=NULL; |
58964a49 RE |
215 | } |
216 | ||
217 | if (bio == NULL) /* ??????????? */ | |
d02b48c6 RE |
218 | { |
219 | if (p7->detached) | |
220 | bio=BIO_new(BIO_s_null()); | |
221 | else | |
222 | { | |
223 | bio=BIO_new(BIO_s_mem()); | |
dfeab068 RE |
224 | /* We need to set this so that when we have read all |
225 | * the data, the encrypt BIO, if present, will read | |
226 | * EOF and encode the last few bytes */ | |
227 | BIO_set_mem_eof_return(bio,0); | |
228 | ||
d02b48c6 RE |
229 | if (PKCS7_type_is_signed(p7) && |
230 | PKCS7_type_is_data(p7->d.sign->contents)) | |
231 | { | |
232 | ASN1_OCTET_STRING *os; | |
233 | ||
234 | os=p7->d.sign->contents->d.data; | |
235 | if (os->length > 0) | |
58964a49 RE |
236 | BIO_write(bio,(char *)os->data, |
237 | os->length); | |
d02b48c6 RE |
238 | } |
239 | } | |
240 | } | |
241 | BIO_push(out,bio); | |
dfeab068 RE |
242 | bio=NULL; |
243 | if (0) | |
244 | { | |
245 | err: | |
246 | if (out != NULL) | |
247 | BIO_free_all(out); | |
248 | if (btmp != NULL) | |
249 | BIO_free_all(btmp); | |
250 | out=NULL; | |
251 | } | |
d02b48c6 | 252 | return(out); |
dfeab068 RE |
253 | } |
254 | ||
255 | /* int */ | |
84fa704c | 256 | BIO *PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio, X509 *pcert) |
dfeab068 RE |
257 | { |
258 | int i,j; | |
259 | BIO *out=NULL,*btmp=NULL,*etmp=NULL,*bio=NULL; | |
260 | char *tmp=NULL; | |
261 | X509_ALGOR *xa; | |
262 | ASN1_OCTET_STRING *data_body=NULL; | |
e778802f BL |
263 | const EVP_MD *evp_md; |
264 | const EVP_CIPHER *evp_cipher=NULL; | |
dfeab068 RE |
265 | EVP_CIPHER_CTX *evp_ctx=NULL; |
266 | X509_ALGOR *enc_alg=NULL; | |
267 | STACK *md_sk=NULL,*rsk=NULL; | |
268 | X509_ALGOR *xalg=NULL; | |
269 | PKCS7_RECIP_INFO *ri=NULL; | |
270 | /* EVP_PKEY *pkey; */ | |
271 | #if 0 | |
272 | X509_STORE_CTX s_ctx; | |
273 | #endif | |
274 | ||
275 | i=OBJ_obj2nid(p7->type); | |
276 | p7->state=PKCS7_S_HEADER; | |
277 | ||
278 | switch (i) | |
279 | { | |
280 | case NID_pkcs7_signed: | |
281 | data_body=p7->d.sign->contents->d.data; | |
282 | md_sk=p7->d.sign->md_algs; | |
283 | break; | |
284 | case NID_pkcs7_signedAndEnveloped: | |
285 | rsk=p7->d.signed_and_enveloped->recipientinfo; | |
286 | md_sk=p7->d.signed_and_enveloped->md_algs; | |
287 | data_body=p7->d.signed_and_enveloped->enc_data->enc_data; | |
288 | enc_alg=p7->d.signed_and_enveloped->enc_data->algorithm; | |
289 | evp_cipher=EVP_get_cipherbyname(OBJ_nid2sn(OBJ_obj2nid(enc_alg->algorithm))); | |
290 | if (evp_cipher == NULL) | |
291 | { | |
84fa704c | 292 | PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CIPHER_TYPE); |
dfeab068 RE |
293 | goto err; |
294 | } | |
295 | xalg=p7->d.signed_and_enveloped->enc_data->algorithm; | |
296 | break; | |
297 | case NID_pkcs7_enveloped: | |
298 | rsk=p7->d.enveloped->recipientinfo; | |
299 | enc_alg=p7->d.enveloped->enc_data->algorithm; | |
300 | data_body=p7->d.enveloped->enc_data->enc_data; | |
301 | evp_cipher=EVP_get_cipherbyname(OBJ_nid2sn(OBJ_obj2nid(enc_alg->algorithm))); | |
302 | if (evp_cipher == NULL) | |
303 | { | |
84fa704c | 304 | PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CIPHER_TYPE); |
dfeab068 RE |
305 | goto err; |
306 | } | |
307 | xalg=p7->d.enveloped->enc_data->algorithm; | |
308 | break; | |
309 | default: | |
84fa704c | 310 | PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CONTENT_TYPE); |
dfeab068 RE |
311 | goto err; |
312 | } | |
313 | ||
314 | /* We will be checking the signature */ | |
315 | if (md_sk != NULL) | |
316 | { | |
317 | for (i=0; i<sk_num(md_sk); i++) | |
318 | { | |
319 | xa=(X509_ALGOR *)sk_value(md_sk,i); | |
320 | if ((btmp=BIO_new(BIO_f_md())) == NULL) | |
321 | { | |
84fa704c | 322 | PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_BIO_LIB); |
dfeab068 RE |
323 | goto err; |
324 | } | |
325 | ||
326 | j=OBJ_obj2nid(xa->algorithm); | |
327 | evp_md=EVP_get_digestbyname(OBJ_nid2sn(j)); | |
328 | if (evp_md == NULL) | |
329 | { | |
84fa704c | 330 | PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNKNOWN_DIGEST_TYPE); |
dfeab068 RE |
331 | goto err; |
332 | } | |
333 | ||
334 | BIO_set_md(btmp,evp_md); | |
335 | if (out == NULL) | |
336 | out=btmp; | |
337 | else | |
338 | BIO_push(out,btmp); | |
339 | btmp=NULL; | |
340 | } | |
341 | } | |
342 | ||
343 | if (evp_cipher != NULL) | |
344 | { | |
345 | #if 0 | |
346 | unsigned char key[EVP_MAX_KEY_LENGTH]; | |
347 | unsigned char iv[EVP_MAX_IV_LENGTH]; | |
348 | unsigned char *p; | |
349 | int keylen,ivlen; | |
350 | int max; | |
351 | X509_OBJECT ret; | |
352 | #endif | |
353 | int jj; | |
354 | ||
355 | if ((etmp=BIO_new(BIO_f_cipher())) == NULL) | |
356 | { | |
84fa704c | 357 | PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_BIO_LIB); |
dfeab068 RE |
358 | goto err; |
359 | } | |
360 | ||
361 | /* It was encrypted, we need to decrypt the secret key | |
362 | * with the private key */ | |
363 | ||
84fa704c DSH |
364 | /* Find the recipientInfo which matches the passed certificate |
365 | * (if any) | |
10243d97 DSH |
366 | */ |
367 | ||
84fa704c | 368 | for (i=0; i<sk_num(rsk); i++) { |
dfeab068 | 369 | ri=(PKCS7_RECIP_INFO *)sk_value(rsk,i); |
84fa704c DSH |
370 | if(!X509_NAME_cmp(ri->issuer_and_serial->issuer, |
371 | pcert->cert_info->issuer) && | |
372 | !ASN1_INTEGER_cmp(pcert->cert_info->serialNumber, | |
373 | ri->issuer_and_serial->serial)) break; | |
dfeab068 | 374 | ri=NULL; |
84fa704c DSH |
375 | } |
376 | if (ri == NULL) { | |
377 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, | |
378 | PKCS7_R_NO_RECIPIENT_MATCHES_CERTIFICATE); | |
dfeab068 | 379 | return(NULL); |
84fa704c | 380 | } |
dfeab068 RE |
381 | |
382 | jj=EVP_PKEY_size(pkey); | |
383 | tmp=Malloc(jj+10); | |
384 | if (tmp == NULL) | |
385 | { | |
84fa704c | 386 | PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_MALLOC_FAILURE); |
dfeab068 RE |
387 | goto err; |
388 | } | |
389 | ||
390 | jj=EVP_PKEY_decrypt((unsigned char *)tmp, | |
391 | ASN1_STRING_data(ri->enc_key), | |
392 | ASN1_STRING_length(ri->enc_key), | |
393 | pkey); | |
394 | if (jj <= 0) | |
395 | { | |
84fa704c | 396 | PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_EVP_LIB); |
dfeab068 RE |
397 | goto err; |
398 | } | |
399 | ||
400 | evp_ctx=NULL; | |
401 | BIO_get_cipher_ctx(etmp,&evp_ctx); | |
402 | EVP_CipherInit(evp_ctx,evp_cipher,NULL,NULL,0); | |
403 | if (EVP_CIPHER_asn1_to_param(evp_ctx,enc_alg->parameter) < 0) | |
404 | return(NULL); | |
405 | ||
406 | if (jj != EVP_CIPHER_CTX_key_length(evp_ctx)) | |
407 | { | |
84fa704c DSH |
408 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, |
409 | PKCS7_R_DECRYPTED_KEY_IS_WRONG_LENGTH); | |
dfeab068 RE |
410 | goto err; |
411 | } | |
412 | EVP_CipherInit(evp_ctx,NULL,(unsigned char *)tmp,NULL,0); | |
413 | ||
414 | memset(tmp,0,jj); | |
415 | ||
416 | if (out == NULL) | |
417 | out=etmp; | |
418 | else | |
419 | BIO_push(out,etmp); | |
420 | etmp=NULL; | |
421 | } | |
422 | ||
423 | #if 1 | |
424 | if (p7->detached || (in_bio != NULL)) | |
425 | { | |
426 | bio=in_bio; | |
427 | } | |
428 | else | |
429 | { | |
430 | bio=BIO_new(BIO_s_mem()); | |
431 | /* We need to set this so that when we have read all | |
432 | * the data, the encrypt BIO, if present, will read | |
433 | * EOF and encode the last few bytes */ | |
434 | BIO_set_mem_eof_return(bio,0); | |
435 | ||
436 | if (data_body->length > 0) | |
437 | BIO_write(bio,(char *)data_body->data,data_body->length); | |
438 | } | |
439 | BIO_push(out,bio); | |
440 | bio=NULL; | |
441 | #endif | |
442 | if (0) | |
443 | { | |
d02b48c6 | 444 | err: |
dfeab068 RE |
445 | if (out != NULL) BIO_free_all(out); |
446 | if (btmp != NULL) BIO_free_all(btmp); | |
447 | if (etmp != NULL) BIO_free_all(etmp); | |
448 | if (bio != NULL) BIO_free_all(bio); | |
449 | out=NULL; | |
450 | } | |
451 | if (tmp != NULL) | |
452 | Free(tmp); | |
453 | return(out); | |
d02b48c6 RE |
454 | } |
455 | ||
6b691a5c | 456 | int PKCS7_dataFinal(PKCS7 *p7, BIO *bio) |
d02b48c6 RE |
457 | { |
458 | int ret=0; | |
459 | int i,j; | |
460 | BIO *btmp; | |
461 | BUF_MEM *buf_mem=NULL; | |
462 | BUF_MEM *buf=NULL; | |
463 | PKCS7_SIGNER_INFO *si; | |
464 | EVP_MD_CTX *mdc,ctx_tmp; | |
58964a49 | 465 | STACK *sk,*si_sk=NULL; |
d02b48c6 RE |
466 | unsigned char *p,*pp=NULL; |
467 | int x; | |
58964a49 | 468 | ASN1_OCTET_STRING *os=NULL; |
d02b48c6 RE |
469 | |
470 | i=OBJ_obj2nid(p7->type); | |
471 | p7->state=PKCS7_S_HEADER; | |
472 | ||
473 | switch (i) | |
474 | { | |
58964a49 RE |
475 | case NID_pkcs7_signedAndEnveloped: |
476 | /* XXXXXXXXXXXXXXXX */ | |
477 | si_sk=p7->d.signed_and_enveloped->signer_info; | |
478 | os=ASN1_OCTET_STRING_new(); | |
479 | p7->d.signed_and_enveloped->enc_data->enc_data=os; | |
480 | break; | |
dfeab068 RE |
481 | case NID_pkcs7_enveloped: |
482 | /* XXXXXXXXXXXXXXXX */ | |
483 | os=ASN1_OCTET_STRING_new(); | |
484 | p7->d.enveloped->enc_data->enc_data=os; | |
485 | break; | |
d02b48c6 | 486 | case NID_pkcs7_signed: |
58964a49 RE |
487 | si_sk=p7->d.sign->signer_info; |
488 | os=p7->d.sign->contents->d.data; | |
924acc54 DSH |
489 | /* If detached data then the content is excluded */ |
490 | if(p7->detached) { | |
491 | ASN1_OCTET_STRING_free(os); | |
492 | p7->d.sign->contents->d.data = NULL; | |
493 | } | |
58964a49 RE |
494 | break; |
495 | } | |
d02b48c6 | 496 | |
58964a49 RE |
497 | if (si_sk != NULL) |
498 | { | |
dfeab068 RE |
499 | if ((buf=BUF_MEM_new()) == NULL) |
500 | { | |
501 | PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_BIO_LIB); | |
502 | goto err; | |
503 | } | |
58964a49 | 504 | for (i=0; i<sk_num(si_sk); i++) |
d02b48c6 RE |
505 | { |
506 | si=(PKCS7_SIGNER_INFO *) | |
58964a49 | 507 | sk_value(si_sk,i); |
dfeab068 RE |
508 | if (si->pkey == NULL) continue; |
509 | ||
510 | j=OBJ_obj2nid(si->digest_alg->algorithm); | |
d02b48c6 RE |
511 | |
512 | btmp=bio; | |
513 | for (;;) | |
514 | { | |
515 | if ((btmp=BIO_find_type(btmp,BIO_TYPE_MD)) | |
516 | == NULL) | |
517 | { | |
58964a49 | 518 | PKCS7err(PKCS7_F_PKCS7_DATASIGN,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST); |
d02b48c6 RE |
519 | goto err; |
520 | } | |
521 | BIO_get_md_ctx(btmp,&mdc); | |
522 | if (mdc == NULL) | |
523 | { | |
58964a49 | 524 | PKCS7err(PKCS7_F_PKCS7_DATASIGN,PKCS7_R_INTERNAL_ERROR); |
d02b48c6 RE |
525 | goto err; |
526 | } | |
dfeab068 | 527 | if (EVP_MD_type(EVP_MD_CTX_type(mdc)) == j) |
d02b48c6 RE |
528 | break; |
529 | else | |
530 | btmp=btmp->next_bio; | |
531 | } | |
532 | ||
533 | /* We now have the EVP_MD_CTX, lets do the | |
534 | * signing. */ | |
535 | memcpy(&ctx_tmp,mdc,sizeof(ctx_tmp)); | |
536 | if (!BUF_MEM_grow(buf,EVP_PKEY_size(si->pkey))) | |
dfeab068 RE |
537 | { |
538 | PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_BIO_LIB); | |
d02b48c6 | 539 | goto err; |
dfeab068 | 540 | } |
d02b48c6 RE |
541 | |
542 | sk=si->auth_attr; | |
dfeab068 RE |
543 | |
544 | /* If there are attributes, we add the digest | |
545 | * attribute and only sign the attributes */ | |
d02b48c6 RE |
546 | if ((sk != NULL) && (sk_num(sk) != 0)) |
547 | { | |
dfeab068 RE |
548 | unsigned char md_data[EVP_MAX_MD_SIZE]; |
549 | unsigned int md_len; | |
550 | ASN1_OCTET_STRING *digest; | |
551 | ASN1_UTCTIME *sign_time; | |
e778802f | 552 | const EVP_MD *md_tmp; |
dfeab068 RE |
553 | |
554 | /* Add signing time */ | |
555 | sign_time=X509_gmtime_adj(NULL,0); | |
556 | PKCS7_add_signed_attribute(si, | |
557 | NID_pkcs9_signingTime, | |
c8b41850 | 558 | V_ASN1_UTCTIME,sign_time); |
dfeab068 RE |
559 | |
560 | /* Add digest */ | |
561 | md_tmp=EVP_MD_CTX_type(&ctx_tmp); | |
562 | EVP_DigestFinal(&ctx_tmp,md_data,&md_len); | |
563 | digest=ASN1_OCTET_STRING_new(); | |
564 | ASN1_OCTET_STRING_set(digest,md_data,md_len); | |
10243d97 DSH |
565 | PKCS7_add_signed_attribute(si, |
566 | NID_pkcs9_messageDigest, | |
c8b41850 | 567 | V_ASN1_OCTET_STRING,digest); |
dfeab068 RE |
568 | |
569 | /* Now sign the mess */ | |
570 | EVP_SignInit(&ctx_tmp,md_tmp); | |
d02b48c6 | 571 | x=i2d_ASN1_SET(sk,NULL,i2d_X509_ATTRIBUTE, |
0c106d75 | 572 | V_ASN1_SET,V_ASN1_UNIVERSAL, IS_SET); |
dfeab068 | 573 | pp=(unsigned char *)Malloc(x); |
d02b48c6 RE |
574 | p=pp; |
575 | i2d_ASN1_SET(sk,&p,i2d_X509_ATTRIBUTE, | |
0c106d75 | 576 | V_ASN1_SET,V_ASN1_UNIVERSAL, IS_SET); |
d02b48c6 RE |
577 | EVP_SignUpdate(&ctx_tmp,pp,x); |
578 | Free(pp); | |
dfeab068 | 579 | pp=NULL; |
d02b48c6 RE |
580 | } |
581 | ||
dfeab068 RE |
582 | if (si->pkey->type == EVP_PKEY_DSA) |
583 | ctx_tmp.digest=EVP_dss1(); | |
584 | ||
58964a49 | 585 | if (!EVP_SignFinal(&ctx_tmp,(unsigned char *)buf->data, |
d02b48c6 | 586 | (unsigned int *)&buf->length,si->pkey)) |
dfeab068 RE |
587 | { |
588 | PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_EVP_LIB); | |
d02b48c6 | 589 | goto err; |
dfeab068 | 590 | } |
d02b48c6 RE |
591 | if (!ASN1_STRING_set(si->enc_digest, |
592 | (unsigned char *)buf->data,buf->length)) | |
d02b48c6 | 593 | { |
dfeab068 | 594 | PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_ASN1_LIB); |
d02b48c6 RE |
595 | goto err; |
596 | } | |
d02b48c6 | 597 | } |
d02b48c6 RE |
598 | } |
599 | ||
924acc54 | 600 | if (!p7->detached) |
dfeab068 RE |
601 | { |
602 | btmp=BIO_find_type(bio,BIO_TYPE_MEM); | |
603 | if (btmp == NULL) | |
604 | { | |
605 | PKCS7err(PKCS7_F_PKCS7_DATASIGN,PKCS7_R_UNABLE_TO_FIND_MEM_BIO); | |
606 | goto err; | |
607 | } | |
608 | BIO_get_mem_ptr(btmp,&buf_mem); | |
609 | ASN1_OCTET_STRING_set(os, | |
610 | (unsigned char *)buf_mem->data,buf_mem->length); | |
611 | } | |
612 | if (pp != NULL) Free(pp); | |
613 | pp=NULL; | |
614 | ||
d02b48c6 RE |
615 | ret=1; |
616 | err: | |
617 | if (buf != NULL) BUF_MEM_free(buf); | |
618 | return(ret); | |
619 | } | |
620 | ||
6b691a5c UM |
621 | int PKCS7_dataVerify(X509_STORE *cert_store, X509_STORE_CTX *ctx, BIO *bio, |
622 | PKCS7 *p7, PKCS7_SIGNER_INFO *si) | |
d02b48c6 | 623 | { |
dfeab068 | 624 | /* PKCS7_SIGNED *s; */ |
d02b48c6 RE |
625 | ASN1_OCTET_STRING *os; |
626 | EVP_MD_CTX mdc_tmp,*mdc; | |
627 | unsigned char *pp,*p; | |
628 | PKCS7_ISSUER_AND_SERIAL *ias; | |
dfeab068 RE |
629 | int ret=0,i; |
630 | int md_type; | |
f73e07cf BL |
631 | STACK *sk; |
632 | STACK_OF(X509) *cert; | |
d02b48c6 RE |
633 | BIO *btmp; |
634 | X509 *x509; | |
924acc54 | 635 | EVP_PKEY *pkey; |
d02b48c6 | 636 | |
dfeab068 RE |
637 | if (PKCS7_type_is_signed(p7)) |
638 | { | |
639 | cert=p7->d.sign->cert; | |
640 | } | |
641 | else if (PKCS7_type_is_signedAndEnveloped(p7)) | |
642 | { | |
643 | cert=p7->d.signed_and_enveloped->cert; | |
644 | } | |
645 | else | |
646 | { | |
647 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_WRONG_PKCS7_TYPE); | |
648 | goto err; | |
649 | } | |
58964a49 | 650 | /* XXXXXXXXXXXXXXXXXXXXXXX */ |
d02b48c6 | 651 | ias=si->issuer_and_serial; |
d02b48c6 | 652 | |
dfeab068 | 653 | x509=X509_find_by_issuer_and_serial(cert,ias->issuer,ias->serial); |
d02b48c6 RE |
654 | |
655 | /* were we able to find the cert in passed to us */ | |
656 | if (x509 == NULL) | |
657 | { | |
658 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_CERTIFICATE); | |
659 | goto err; | |
660 | } | |
661 | ||
662 | /* Lets verify */ | |
dfeab068 | 663 | X509_STORE_CTX_init(ctx,cert_store,x509,cert); |
d02b48c6 | 664 | i=X509_verify_cert(ctx); |
dfeab068 RE |
665 | if (i <= 0) |
666 | { | |
667 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,ERR_R_X509_LIB); | |
668 | goto err; | |
669 | } | |
d02b48c6 RE |
670 | X509_STORE_CTX_cleanup(ctx); |
671 | ||
672 | /* So we like 'x509', lets check the signature. */ | |
673 | md_type=OBJ_obj2nid(si->digest_alg->algorithm); | |
674 | ||
675 | btmp=bio; | |
676 | for (;;) | |
677 | { | |
678 | if ((btmp == NULL) || | |
679 | ((btmp=BIO_find_type(btmp,BIO_TYPE_MD)) == NULL)) | |
680 | { | |
681 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST); | |
682 | goto err; | |
683 | } | |
684 | BIO_get_md_ctx(btmp,&mdc); | |
685 | if (mdc == NULL) | |
686 | { | |
687 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_INTERNAL_ERROR); | |
688 | goto err; | |
689 | } | |
690 | if (EVP_MD_type(EVP_MD_CTX_type(mdc)) == md_type) | |
691 | break; | |
692 | btmp=btmp->next_bio; | |
693 | } | |
694 | ||
dfeab068 RE |
695 | /* mdc is the digest ctx that we want, unless there are attributes, |
696 | * in which case the digest is the signed attributes */ | |
d02b48c6 RE |
697 | memcpy(&mdc_tmp,mdc,sizeof(mdc_tmp)); |
698 | ||
699 | sk=si->auth_attr; | |
700 | if ((sk != NULL) && (sk_num(sk) != 0)) | |
701 | { | |
dfeab068 | 702 | unsigned char md_dat[EVP_MAX_MD_SIZE]; |
0b415fb0 | 703 | unsigned int md_len; |
dfeab068 RE |
704 | ASN1_OCTET_STRING *message_digest; |
705 | ||
706 | EVP_DigestFinal(&mdc_tmp,md_dat,&md_len); | |
707 | message_digest=PKCS7_digest_from_attributes(sk); | |
708 | if (!message_digest) | |
709 | { | |
710 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST); | |
711 | goto err; | |
712 | } | |
0b415fb0 | 713 | if ((message_digest->length != (int)md_len) || |
dfeab068 RE |
714 | (memcmp(message_digest->data,md_dat,md_len))) |
715 | { | |
716 | #if 0 | |
717 | { | |
718 | int ii; | |
719 | for (ii=0; ii<message_digest->length; ii++) | |
720 | printf("%02X",message_digest->data[ii]); printf(" sent\n"); | |
721 | for (ii=0; ii<md_len; ii++) printf("%02X",md_dat[ii]); printf(" calc\n"); | |
722 | } | |
723 | #endif | |
724 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_DIGEST_FAILURE); | |
725 | ret= -1; | |
726 | goto err; | |
727 | } | |
728 | ||
729 | EVP_VerifyInit(&mdc_tmp,EVP_get_digestbynid(md_type)); | |
924acc54 DSH |
730 | /* Note: when forming the encoding of the attributes we |
731 | * shouldn't reorder them or this will break the signature. | |
732 | * This is done by using the IS_SEQUENCE flag. | |
733 | */ | |
d02b48c6 | 734 | i=i2d_ASN1_SET(sk,NULL,i2d_X509_ATTRIBUTE, |
924acc54 | 735 | V_ASN1_SET,V_ASN1_UNIVERSAL, IS_SEQUENCE); |
dfeab068 | 736 | pp=(unsigned char *)Malloc(i); |
d02b48c6 RE |
737 | p=pp; |
738 | i2d_ASN1_SET(sk,&p,i2d_X509_ATTRIBUTE, | |
924acc54 | 739 | V_ASN1_SET,V_ASN1_UNIVERSAL, IS_SEQUENCE); |
d02b48c6 | 740 | EVP_VerifyUpdate(&mdc_tmp,pp,i); |
924acc54 | 741 | |
dfeab068 | 742 | Free(pp); |
d02b48c6 RE |
743 | } |
744 | ||
745 | os=si->enc_digest; | |
924acc54 DSH |
746 | pkey = X509_get_pubkey(x509); |
747 | if(pkey->type == EVP_PKEY_DSA) mdc_tmp.digest=EVP_dss1(); | |
dfeab068 | 748 | |
924acc54 DSH |
749 | i=EVP_VerifyFinal(&mdc_tmp,os->data,os->length, pkey); |
750 | EVP_PKEY_free(pkey); | |
d02b48c6 RE |
751 | if (i <= 0) |
752 | { | |
753 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_SIGNATURE_FAILURE); | |
754 | ret= -1; | |
755 | goto err; | |
756 | } | |
757 | else | |
758 | ret=1; | |
759 | err: | |
760 | return(ret); | |
761 | } | |
762 | ||
6b691a5c | 763 | PKCS7_ISSUER_AND_SERIAL *PKCS7_get_issuer_and_serial(PKCS7 *p7, int idx) |
dfeab068 RE |
764 | { |
765 | STACK *rsk; | |
766 | PKCS7_RECIP_INFO *ri; | |
767 | int i; | |
768 | ||
769 | i=OBJ_obj2nid(p7->type); | |
770 | if (i != NID_pkcs7_signedAndEnveloped) return(NULL); | |
771 | rsk=p7->d.signed_and_enveloped->recipientinfo; | |
772 | ri=(PKCS7_RECIP_INFO *)sk_value(rsk,0); | |
773 | if (sk_num(rsk) <= idx) return(NULL); | |
774 | ri=(PKCS7_RECIP_INFO *)sk_value(rsk,idx); | |
775 | return(ri->issuer_and_serial); | |
776 | } | |
777 | ||
6b691a5c | 778 | ASN1_TYPE *PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO *si, int nid) |
dfeab068 RE |
779 | { |
780 | return(get_attribute(si->auth_attr,nid)); | |
781 | } | |
782 | ||
6b691a5c | 783 | ASN1_TYPE *PKCS7_get_attribute(PKCS7_SIGNER_INFO *si, int nid) |
dfeab068 RE |
784 | { |
785 | return(get_attribute(si->unauth_attr,nid)); | |
786 | } | |
787 | ||
6b691a5c | 788 | static ASN1_TYPE *get_attribute(STACK *sk, int nid) |
dfeab068 RE |
789 | { |
790 | int i; | |
791 | X509_ATTRIBUTE *xa; | |
792 | ASN1_OBJECT *o; | |
793 | ||
794 | o=OBJ_nid2obj(nid); | |
10243d97 | 795 | if (!o || !sk) return(NULL); |
dfeab068 RE |
796 | for (i=0; i<sk_num(sk); i++) |
797 | { | |
798 | xa=(X509_ATTRIBUTE *)sk_value(sk,i); | |
799 | if (OBJ_cmp(xa->object,o) == 0) | |
800 | { | |
d35ea5b0 BL |
801 | if (xa->set && sk_ASN1_TYPE_num(xa->value.set)) |
802 | return(sk_ASN1_TYPE_value(xa->value.set,0)); | |
dfeab068 RE |
803 | else |
804 | return(NULL); | |
805 | } | |
806 | } | |
807 | return(NULL); | |
808 | } | |
809 | ||
6b691a5c | 810 | ASN1_OCTET_STRING *PKCS7_digest_from_attributes(STACK *sk) |
10243d97 | 811 | { |
dfeab068 | 812 | ASN1_TYPE *astype; |
10243d97 DSH |
813 | if(!(astype = get_attribute(sk, NID_pkcs9_messageDigest))) return NULL; |
814 | return astype->value.octet_string; | |
815 | } | |
dfeab068 | 816 | |
6b691a5c | 817 | int PKCS7_set_signed_attributes(PKCS7_SIGNER_INFO *p7si, STACK *sk) |
dfeab068 RE |
818 | { |
819 | int i; | |
820 | ||
821 | if (p7si->auth_attr != NULL) | |
822 | sk_pop_free(p7si->auth_attr,X509_ATTRIBUTE_free); | |
823 | p7si->auth_attr=sk_dup(sk); | |
824 | for (i=0; i<sk_num(sk); i++) | |
825 | { | |
826 | if ((sk_value(p7si->auth_attr,i)=(char *)X509_ATTRIBUTE_dup( | |
827 | (X509_ATTRIBUTE *)sk_value(sk,i))) == NULL) | |
828 | return(0); | |
829 | } | |
830 | return(1); | |
831 | } | |
832 | ||
6b691a5c | 833 | int PKCS7_set_attributes(PKCS7_SIGNER_INFO *p7si, STACK *sk) |
dfeab068 RE |
834 | { |
835 | int i; | |
836 | ||
837 | if (p7si->unauth_attr != NULL) | |
838 | sk_pop_free(p7si->unauth_attr,X509_ATTRIBUTE_free); | |
839 | p7si->unauth_attr=sk_dup(sk); | |
840 | for (i=0; i<sk_num(sk); i++) | |
841 | { | |
842 | if ((sk_value(p7si->unauth_attr,i)=(char *)X509_ATTRIBUTE_dup( | |
843 | (X509_ATTRIBUTE *)sk_value(sk,i))) == NULL) | |
844 | return(0); | |
845 | } | |
846 | return(1); | |
847 | } | |
848 | ||
6b691a5c | 849 | int PKCS7_add_signed_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype, |
c8b41850 | 850 | void *value) |
dfeab068 RE |
851 | { |
852 | return(add_attribute(&(p7si->auth_attr),nid,atrtype,value)); | |
853 | } | |
854 | ||
6b691a5c | 855 | int PKCS7_add_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype, |
c8b41850 | 856 | void *value) |
dfeab068 RE |
857 | { |
858 | return(add_attribute(&(p7si->unauth_attr),nid,atrtype,value)); | |
859 | } | |
860 | ||
c8b41850 | 861 | static int add_attribute(STACK **sk, int nid, int atrtype, void *value) |
dfeab068 RE |
862 | { |
863 | X509_ATTRIBUTE *attr=NULL; | |
dfeab068 RE |
864 | |
865 | if (*sk == NULL) | |
866 | { | |
867 | *sk = sk_new(NULL); | |
868 | new_attrib: | |
869 | attr=X509_ATTRIBUTE_create(nid,atrtype,value); | |
870 | sk_push(*sk,(char *)attr); | |
871 | } | |
872 | else | |
873 | { | |
874 | int i; | |
875 | ||
876 | for (i=0; i<sk_num(*sk); i++) | |
877 | { | |
878 | attr=(X509_ATTRIBUTE *)sk_value(*sk,i); | |
879 | if (OBJ_obj2nid(attr->object) == nid) | |
880 | { | |
881 | X509_ATTRIBUTE_free(attr); | |
882 | attr=X509_ATTRIBUTE_create(nid,atrtype,value); | |
883 | sk_value(*sk,i)=(char *)attr; | |
884 | goto end; | |
885 | } | |
886 | } | |
887 | goto new_attrib; | |
888 | } | |
889 | end: | |
890 | return(1); | |
891 | } | |
892 |