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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 | ||
68 | #if 1 | |
6b691a5c | 69 | BIO *PKCS7_dataInit(PKCS7 *p7, BIO *bio) |
d02b48c6 RE |
70 | { |
71 | int i,j; | |
dfeab068 | 72 | BIO *out=NULL,*btmp=NULL; |
d02b48c6 | 73 | X509_ALGOR *xa; |
e778802f BL |
74 | const EVP_MD *evp_md; |
75 | const EVP_CIPHER *evp_cipher=NULL; | |
58964a49 RE |
76 | STACK *md_sk=NULL,*rsk=NULL; |
77 | X509_ALGOR *xalg=NULL; | |
78 | PKCS7_RECIP_INFO *ri=NULL; | |
79 | EVP_PKEY *pkey; | |
d02b48c6 RE |
80 | |
81 | i=OBJ_obj2nid(p7->type); | |
82 | p7->state=PKCS7_S_HEADER; | |
83 | ||
84 | switch (i) | |
85 | { | |
86 | case NID_pkcs7_signed: | |
58964a49 RE |
87 | md_sk=p7->d.sign->md_algs; |
88 | break; | |
89 | case NID_pkcs7_signedAndEnveloped: | |
90 | rsk=p7->d.signed_and_enveloped->recipientinfo; | |
91 | md_sk=p7->d.signed_and_enveloped->md_algs; | |
92 | evp_cipher=EVP_get_cipherbyname(OBJ_nid2sn(OBJ_obj2nid(p7->d.signed_and_enveloped->enc_data->algorithm->algorithm))); | |
93 | if (evp_cipher == NULL) | |
d02b48c6 | 94 | { |
58964a49 RE |
95 | PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNSUPPORTED_CIPHER_TYPE); |
96 | goto err; | |
97 | } | |
98 | xalg=p7->d.signed_and_enveloped->enc_data->algorithm; | |
99 | break; | |
dfeab068 RE |
100 | case NID_pkcs7_enveloped: |
101 | rsk=p7->d.enveloped->recipientinfo; | |
102 | evp_cipher=EVP_get_cipherbyname(OBJ_nid2sn(OBJ_obj2nid(p7->d.enveloped->enc_data->algorithm->algorithm))); | |
103 | if (evp_cipher == NULL) | |
104 | { | |
105 | PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNSUPPORTED_CIPHER_TYPE); | |
106 | goto err; | |
107 | } | |
108 | xalg=p7->d.enveloped->enc_data->algorithm; | |
109 | break; | |
58964a49 RE |
110 | default: |
111 | PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE); | |
112 | goto err; | |
113 | } | |
114 | ||
115 | if (md_sk != NULL) | |
116 | { | |
117 | for (i=0; i<sk_num(md_sk); i++) | |
118 | { | |
119 | xa=(X509_ALGOR *)sk_value(md_sk,i); | |
dfeab068 RE |
120 | if ((btmp=BIO_new(BIO_f_md())) == NULL) |
121 | { | |
122 | PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_BIO_LIB); | |
123 | goto err; | |
124 | } | |
d02b48c6 RE |
125 | |
126 | j=OBJ_obj2nid(xa->algorithm); | |
127 | evp_md=EVP_get_digestbyname(OBJ_nid2sn(j)); | |
128 | if (evp_md == NULL) | |
129 | { | |
130 | PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNKNOWN_DIGEST_TYPE); | |
131 | goto err; | |
132 | } | |
133 | ||
134 | BIO_set_md(btmp,evp_md); | |
135 | if (out == NULL) | |
136 | out=btmp; | |
137 | else | |
138 | BIO_push(out,btmp); | |
dfeab068 | 139 | btmp=NULL; |
d02b48c6 | 140 | } |
d02b48c6 | 141 | } |
58964a49 RE |
142 | |
143 | if (evp_cipher != NULL) | |
144 | { | |
145 | unsigned char key[EVP_MAX_KEY_LENGTH]; | |
146 | unsigned char iv[EVP_MAX_IV_LENGTH]; | |
147 | int keylen,ivlen; | |
148 | int jj,max; | |
149 | unsigned char *tmp; | |
150 | ||
dfeab068 RE |
151 | if ((btmp=BIO_new(BIO_f_cipher())) == NULL) |
152 | { | |
153 | PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_BIO_LIB); | |
154 | goto err; | |
155 | } | |
58964a49 RE |
156 | keylen=EVP_CIPHER_key_length(evp_cipher); |
157 | ivlen=EVP_CIPHER_iv_length(evp_cipher); | |
158 | ||
884e8ec6 DSH |
159 | if (ivlen > 0) { |
160 | EVP_CIPHER_CTX *ctx; | |
161 | BIO_get_cipher_ctx(btmp, &ctx); | |
162 | if (xalg->parameter == NULL) | |
163 | xalg->parameter=ASN1_TYPE_new(); | |
164 | if(EVP_CIPHER_param_to_asn1(ctx, xalg->parameter) < 0) | |
165 | goto err; | |
166 | } | |
58964a49 RE |
167 | RAND_bytes(key,keylen); |
168 | ||
169 | /* Lets do the pub key stuff :-) */ | |
170 | max=0; | |
171 | for (i=0; i<sk_num(rsk); i++) | |
172 | { | |
173 | ri=(PKCS7_RECIP_INFO *)sk_value(rsk,i); | |
dfeab068 RE |
174 | if (ri->cert == NULL) |
175 | { | |
176 | PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_MISSING_CERIPEND_INFO); | |
177 | goto err; | |
178 | } | |
58964a49 RE |
179 | pkey=X509_get_pubkey(ri->cert); |
180 | jj=EVP_PKEY_size(pkey); | |
924acc54 | 181 | EVP_PKEY_free(pkey); |
58964a49 RE |
182 | if (max < jj) max=jj; |
183 | } | |
dfeab068 RE |
184 | if ((tmp=(unsigned char *)Malloc(max)) == NULL) |
185 | { | |
186 | PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_MALLOC_FAILURE); | |
187 | goto err; | |
188 | } | |
58964a49 RE |
189 | for (i=0; i<sk_num(rsk); i++) |
190 | { | |
191 | ri=(PKCS7_RECIP_INFO *)sk_value(rsk,i); | |
192 | pkey=X509_get_pubkey(ri->cert); | |
193 | jj=EVP_PKEY_encrypt(tmp,key,keylen,pkey); | |
924acc54 | 194 | EVP_PKEY_free(pkey); |
dfeab068 RE |
195 | if (jj <= 0) |
196 | { | |
197 | PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_EVP_LIB); | |
198 | Free(tmp); | |
199 | goto err; | |
200 | } | |
58964a49 RE |
201 | ASN1_OCTET_STRING_set(ri->enc_key,tmp,jj); |
202 | } | |
dfeab068 | 203 | Free(tmp); |
58964a49 RE |
204 | |
205 | BIO_set_cipher(btmp,evp_cipher,key,iv,1); | |
206 | ||
207 | if (out == NULL) | |
208 | out=btmp; | |
209 | else | |
210 | BIO_push(out,btmp); | |
dfeab068 | 211 | btmp=NULL; |
58964a49 RE |
212 | } |
213 | ||
214 | if (bio == NULL) /* ??????????? */ | |
d02b48c6 RE |
215 | { |
216 | if (p7->detached) | |
217 | bio=BIO_new(BIO_s_null()); | |
218 | else | |
219 | { | |
220 | bio=BIO_new(BIO_s_mem()); | |
dfeab068 RE |
221 | /* We need to set this so that when we have read all |
222 | * the data, the encrypt BIO, if present, will read | |
223 | * EOF and encode the last few bytes */ | |
224 | BIO_set_mem_eof_return(bio,0); | |
225 | ||
d02b48c6 RE |
226 | if (PKCS7_type_is_signed(p7) && |
227 | PKCS7_type_is_data(p7->d.sign->contents)) | |
228 | { | |
229 | ASN1_OCTET_STRING *os; | |
230 | ||
231 | os=p7->d.sign->contents->d.data; | |
232 | if (os->length > 0) | |
58964a49 RE |
233 | BIO_write(bio,(char *)os->data, |
234 | os->length); | |
d02b48c6 RE |
235 | } |
236 | } | |
237 | } | |
238 | BIO_push(out,bio); | |
dfeab068 RE |
239 | bio=NULL; |
240 | if (0) | |
241 | { | |
242 | err: | |
243 | if (out != NULL) | |
244 | BIO_free_all(out); | |
245 | if (btmp != NULL) | |
246 | BIO_free_all(btmp); | |
247 | out=NULL; | |
248 | } | |
d02b48c6 | 249 | return(out); |
dfeab068 RE |
250 | } |
251 | ||
252 | /* int */ | |
6b691a5c UM |
253 | BIO *PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio, |
254 | X509_STORE *xs) | |
dfeab068 RE |
255 | { |
256 | int i,j; | |
257 | BIO *out=NULL,*btmp=NULL,*etmp=NULL,*bio=NULL; | |
258 | char *tmp=NULL; | |
259 | X509_ALGOR *xa; | |
260 | ASN1_OCTET_STRING *data_body=NULL; | |
e778802f BL |
261 | const EVP_MD *evp_md; |
262 | const EVP_CIPHER *evp_cipher=NULL; | |
dfeab068 RE |
263 | EVP_CIPHER_CTX *evp_ctx=NULL; |
264 | X509_ALGOR *enc_alg=NULL; | |
265 | STACK *md_sk=NULL,*rsk=NULL; | |
266 | X509_ALGOR *xalg=NULL; | |
267 | PKCS7_RECIP_INFO *ri=NULL; | |
268 | /* EVP_PKEY *pkey; */ | |
269 | #if 0 | |
270 | X509_STORE_CTX s_ctx; | |
271 | #endif | |
272 | ||
273 | i=OBJ_obj2nid(p7->type); | |
274 | p7->state=PKCS7_S_HEADER; | |
275 | ||
276 | switch (i) | |
277 | { | |
278 | case NID_pkcs7_signed: | |
279 | data_body=p7->d.sign->contents->d.data; | |
280 | md_sk=p7->d.sign->md_algs; | |
281 | break; | |
282 | case NID_pkcs7_signedAndEnveloped: | |
283 | rsk=p7->d.signed_and_enveloped->recipientinfo; | |
284 | md_sk=p7->d.signed_and_enveloped->md_algs; | |
285 | data_body=p7->d.signed_and_enveloped->enc_data->enc_data; | |
286 | enc_alg=p7->d.signed_and_enveloped->enc_data->algorithm; | |
287 | evp_cipher=EVP_get_cipherbyname(OBJ_nid2sn(OBJ_obj2nid(enc_alg->algorithm))); | |
288 | if (evp_cipher == NULL) | |
289 | { | |
290 | PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,PKCS7_R_UNSUPPORTED_CIPHER_TYPE); | |
291 | goto err; | |
292 | } | |
293 | xalg=p7->d.signed_and_enveloped->enc_data->algorithm; | |
294 | break; | |
295 | case NID_pkcs7_enveloped: | |
296 | rsk=p7->d.enveloped->recipientinfo; | |
297 | enc_alg=p7->d.enveloped->enc_data->algorithm; | |
298 | data_body=p7->d.enveloped->enc_data->enc_data; | |
299 | evp_cipher=EVP_get_cipherbyname(OBJ_nid2sn(OBJ_obj2nid(enc_alg->algorithm))); | |
300 | if (evp_cipher == NULL) | |
301 | { | |
302 | PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,PKCS7_R_UNSUPPORTED_CIPHER_TYPE); | |
303 | goto err; | |
304 | } | |
305 | xalg=p7->d.enveloped->enc_data->algorithm; | |
306 | break; | |
307 | default: | |
308 | PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE); | |
309 | goto err; | |
310 | } | |
311 | ||
312 | /* We will be checking the signature */ | |
313 | if (md_sk != NULL) | |
314 | { | |
315 | for (i=0; i<sk_num(md_sk); i++) | |
316 | { | |
317 | xa=(X509_ALGOR *)sk_value(md_sk,i); | |
318 | if ((btmp=BIO_new(BIO_f_md())) == NULL) | |
319 | { | |
320 | PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,ERR_R_BIO_LIB); | |
321 | goto err; | |
322 | } | |
323 | ||
324 | j=OBJ_obj2nid(xa->algorithm); | |
325 | evp_md=EVP_get_digestbyname(OBJ_nid2sn(j)); | |
326 | if (evp_md == NULL) | |
327 | { | |
328 | PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,PKCS7_R_UNKNOWN_DIGEST_TYPE); | |
329 | goto err; | |
330 | } | |
331 | ||
332 | BIO_set_md(btmp,evp_md); | |
333 | if (out == NULL) | |
334 | out=btmp; | |
335 | else | |
336 | BIO_push(out,btmp); | |
337 | btmp=NULL; | |
338 | } | |
339 | } | |
340 | ||
341 | if (evp_cipher != NULL) | |
342 | { | |
343 | #if 0 | |
344 | unsigned char key[EVP_MAX_KEY_LENGTH]; | |
345 | unsigned char iv[EVP_MAX_IV_LENGTH]; | |
346 | unsigned char *p; | |
347 | int keylen,ivlen; | |
348 | int max; | |
349 | X509_OBJECT ret; | |
350 | #endif | |
351 | int jj; | |
352 | ||
353 | if ((etmp=BIO_new(BIO_f_cipher())) == NULL) | |
354 | { | |
355 | PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,ERR_R_BIO_LIB); | |
356 | goto err; | |
357 | } | |
358 | ||
359 | /* It was encrypted, we need to decrypt the secret key | |
360 | * with the private key */ | |
361 | ||
362 | /* We need to find a private key for one of the people in the | |
363 | * recipentinfo list */ | |
364 | if (rsk == NULL) | |
365 | return(NULL); | |
366 | ||
367 | ri=(PKCS7_RECIP_INFO *)sk_value(rsk,0); | |
368 | #if 0 | |
369 | X509_STORE_CTX_init(&s_ctx,xs,NULL,NULL); | |
370 | for (i=0; i<sk_num(rsk); i++) | |
371 | { | |
372 | ri=(PKCS7_RECIP_INFO *)sk_value(rsk,i); | |
373 | uf (X509_STORE_get_by_issuer_serial(&s_ctx, | |
374 | X509_LU_PKEY, | |
375 | ri->issuer_and_serial->issuer, | |
376 | ri->issuer_and_serial->serial, | |
377 | &ret)) | |
378 | break; | |
379 | ri=NULL; | |
380 | } | |
381 | if (ri == NULL) return(NULL); | |
382 | pkey=ret.data.pkey; | |
383 | #endif | |
384 | if (pkey == NULL) | |
385 | { | |
386 | return(NULL); | |
387 | } | |
388 | ||
389 | jj=EVP_PKEY_size(pkey); | |
390 | tmp=Malloc(jj+10); | |
391 | if (tmp == NULL) | |
392 | { | |
393 | PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,ERR_R_MALLOC_FAILURE); | |
394 | goto err; | |
395 | } | |
396 | ||
397 | jj=EVP_PKEY_decrypt((unsigned char *)tmp, | |
398 | ASN1_STRING_data(ri->enc_key), | |
399 | ASN1_STRING_length(ri->enc_key), | |
400 | pkey); | |
401 | if (jj <= 0) | |
402 | { | |
403 | PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,ERR_R_EVP_LIB); | |
404 | goto err; | |
405 | } | |
406 | ||
407 | evp_ctx=NULL; | |
408 | BIO_get_cipher_ctx(etmp,&evp_ctx); | |
409 | EVP_CipherInit(evp_ctx,evp_cipher,NULL,NULL,0); | |
410 | if (EVP_CIPHER_asn1_to_param(evp_ctx,enc_alg->parameter) < 0) | |
411 | return(NULL); | |
412 | ||
413 | if (jj != EVP_CIPHER_CTX_key_length(evp_ctx)) | |
414 | { | |
415 | PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,PKCS7_R_DECRYPTED_KEY_IS_WRONG_LENGTH); | |
416 | goto err; | |
417 | } | |
418 | EVP_CipherInit(evp_ctx,NULL,(unsigned char *)tmp,NULL,0); | |
419 | ||
420 | memset(tmp,0,jj); | |
421 | ||
422 | if (out == NULL) | |
423 | out=etmp; | |
424 | else | |
425 | BIO_push(out,etmp); | |
426 | etmp=NULL; | |
427 | } | |
428 | ||
429 | #if 1 | |
430 | if (p7->detached || (in_bio != NULL)) | |
431 | { | |
432 | bio=in_bio; | |
433 | } | |
434 | else | |
435 | { | |
436 | bio=BIO_new(BIO_s_mem()); | |
437 | /* We need to set this so that when we have read all | |
438 | * the data, the encrypt BIO, if present, will read | |
439 | * EOF and encode the last few bytes */ | |
440 | BIO_set_mem_eof_return(bio,0); | |
441 | ||
442 | if (data_body->length > 0) | |
443 | BIO_write(bio,(char *)data_body->data,data_body->length); | |
444 | } | |
445 | BIO_push(out,bio); | |
446 | bio=NULL; | |
447 | #endif | |
448 | if (0) | |
449 | { | |
d02b48c6 | 450 | err: |
dfeab068 RE |
451 | if (out != NULL) BIO_free_all(out); |
452 | if (btmp != NULL) BIO_free_all(btmp); | |
453 | if (etmp != NULL) BIO_free_all(etmp); | |
454 | if (bio != NULL) BIO_free_all(bio); | |
455 | out=NULL; | |
456 | } | |
457 | if (tmp != NULL) | |
458 | Free(tmp); | |
459 | return(out); | |
d02b48c6 | 460 | } |
dfeab068 | 461 | #endif |
d02b48c6 | 462 | |
6b691a5c | 463 | int PKCS7_dataFinal(PKCS7 *p7, BIO *bio) |
d02b48c6 RE |
464 | { |
465 | int ret=0; | |
466 | int i,j; | |
467 | BIO *btmp; | |
468 | BUF_MEM *buf_mem=NULL; | |
469 | BUF_MEM *buf=NULL; | |
470 | PKCS7_SIGNER_INFO *si; | |
471 | EVP_MD_CTX *mdc,ctx_tmp; | |
58964a49 | 472 | STACK *sk,*si_sk=NULL; |
d02b48c6 RE |
473 | unsigned char *p,*pp=NULL; |
474 | int x; | |
58964a49 | 475 | ASN1_OCTET_STRING *os=NULL; |
d02b48c6 RE |
476 | |
477 | i=OBJ_obj2nid(p7->type); | |
478 | p7->state=PKCS7_S_HEADER; | |
479 | ||
480 | switch (i) | |
481 | { | |
58964a49 RE |
482 | case NID_pkcs7_signedAndEnveloped: |
483 | /* XXXXXXXXXXXXXXXX */ | |
484 | si_sk=p7->d.signed_and_enveloped->signer_info; | |
485 | os=ASN1_OCTET_STRING_new(); | |
486 | p7->d.signed_and_enveloped->enc_data->enc_data=os; | |
487 | break; | |
dfeab068 RE |
488 | case NID_pkcs7_enveloped: |
489 | /* XXXXXXXXXXXXXXXX */ | |
490 | os=ASN1_OCTET_STRING_new(); | |
491 | p7->d.enveloped->enc_data->enc_data=os; | |
492 | break; | |
d02b48c6 | 493 | case NID_pkcs7_signed: |
58964a49 RE |
494 | si_sk=p7->d.sign->signer_info; |
495 | os=p7->d.sign->contents->d.data; | |
924acc54 DSH |
496 | /* If detached data then the content is excluded */ |
497 | if(p7->detached) { | |
498 | ASN1_OCTET_STRING_free(os); | |
499 | p7->d.sign->contents->d.data = NULL; | |
500 | } | |
58964a49 RE |
501 | break; |
502 | } | |
d02b48c6 | 503 | |
58964a49 RE |
504 | if (si_sk != NULL) |
505 | { | |
dfeab068 RE |
506 | if ((buf=BUF_MEM_new()) == NULL) |
507 | { | |
508 | PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_BIO_LIB); | |
509 | goto err; | |
510 | } | |
58964a49 | 511 | for (i=0; i<sk_num(si_sk); i++) |
d02b48c6 RE |
512 | { |
513 | si=(PKCS7_SIGNER_INFO *) | |
58964a49 | 514 | sk_value(si_sk,i); |
dfeab068 RE |
515 | if (si->pkey == NULL) continue; |
516 | ||
517 | j=OBJ_obj2nid(si->digest_alg->algorithm); | |
d02b48c6 RE |
518 | |
519 | btmp=bio; | |
520 | for (;;) | |
521 | { | |
522 | if ((btmp=BIO_find_type(btmp,BIO_TYPE_MD)) | |
523 | == NULL) | |
524 | { | |
58964a49 | 525 | PKCS7err(PKCS7_F_PKCS7_DATASIGN,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST); |
d02b48c6 RE |
526 | goto err; |
527 | } | |
528 | BIO_get_md_ctx(btmp,&mdc); | |
529 | if (mdc == NULL) | |
530 | { | |
58964a49 | 531 | PKCS7err(PKCS7_F_PKCS7_DATASIGN,PKCS7_R_INTERNAL_ERROR); |
d02b48c6 RE |
532 | goto err; |
533 | } | |
dfeab068 | 534 | if (EVP_MD_type(EVP_MD_CTX_type(mdc)) == j) |
d02b48c6 RE |
535 | break; |
536 | else | |
537 | btmp=btmp->next_bio; | |
538 | } | |
539 | ||
540 | /* We now have the EVP_MD_CTX, lets do the | |
541 | * signing. */ | |
542 | memcpy(&ctx_tmp,mdc,sizeof(ctx_tmp)); | |
543 | if (!BUF_MEM_grow(buf,EVP_PKEY_size(si->pkey))) | |
dfeab068 RE |
544 | { |
545 | PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_BIO_LIB); | |
d02b48c6 | 546 | goto err; |
dfeab068 | 547 | } |
d02b48c6 RE |
548 | |
549 | sk=si->auth_attr; | |
dfeab068 RE |
550 | |
551 | /* If there are attributes, we add the digest | |
552 | * attribute and only sign the attributes */ | |
d02b48c6 RE |
553 | if ((sk != NULL) && (sk_num(sk) != 0)) |
554 | { | |
dfeab068 RE |
555 | unsigned char md_data[EVP_MAX_MD_SIZE]; |
556 | unsigned int md_len; | |
557 | ASN1_OCTET_STRING *digest; | |
558 | ASN1_UTCTIME *sign_time; | |
e778802f | 559 | const EVP_MD *md_tmp; |
dfeab068 RE |
560 | |
561 | /* Add signing time */ | |
562 | sign_time=X509_gmtime_adj(NULL,0); | |
563 | PKCS7_add_signed_attribute(si, | |
564 | NID_pkcs9_signingTime, | |
c8b41850 | 565 | V_ASN1_UTCTIME,sign_time); |
dfeab068 RE |
566 | |
567 | /* Add digest */ | |
568 | md_tmp=EVP_MD_CTX_type(&ctx_tmp); | |
569 | EVP_DigestFinal(&ctx_tmp,md_data,&md_len); | |
570 | digest=ASN1_OCTET_STRING_new(); | |
571 | ASN1_OCTET_STRING_set(digest,md_data,md_len); | |
572 | PKCS7_add_signed_attribute(si,NID_pkcs9_messageDigest, | |
c8b41850 | 573 | V_ASN1_OCTET_STRING,digest); |
dfeab068 RE |
574 | |
575 | /* Now sign the mess */ | |
576 | EVP_SignInit(&ctx_tmp,md_tmp); | |
d02b48c6 | 577 | x=i2d_ASN1_SET(sk,NULL,i2d_X509_ATTRIBUTE, |
0c106d75 | 578 | V_ASN1_SET,V_ASN1_UNIVERSAL, IS_SET); |
dfeab068 | 579 | pp=(unsigned char *)Malloc(x); |
d02b48c6 RE |
580 | p=pp; |
581 | i2d_ASN1_SET(sk,&p,i2d_X509_ATTRIBUTE, | |
0c106d75 | 582 | V_ASN1_SET,V_ASN1_UNIVERSAL, IS_SET); |
d02b48c6 RE |
583 | EVP_SignUpdate(&ctx_tmp,pp,x); |
584 | Free(pp); | |
dfeab068 | 585 | pp=NULL; |
d02b48c6 RE |
586 | } |
587 | ||
dfeab068 RE |
588 | if (si->pkey->type == EVP_PKEY_DSA) |
589 | ctx_tmp.digest=EVP_dss1(); | |
590 | ||
58964a49 | 591 | if (!EVP_SignFinal(&ctx_tmp,(unsigned char *)buf->data, |
d02b48c6 | 592 | (unsigned int *)&buf->length,si->pkey)) |
dfeab068 RE |
593 | { |
594 | PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_EVP_LIB); | |
d02b48c6 | 595 | goto err; |
dfeab068 | 596 | } |
d02b48c6 RE |
597 | if (!ASN1_STRING_set(si->enc_digest, |
598 | (unsigned char *)buf->data,buf->length)) | |
d02b48c6 | 599 | { |
dfeab068 | 600 | PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_ASN1_LIB); |
d02b48c6 RE |
601 | goto err; |
602 | } | |
d02b48c6 | 603 | } |
d02b48c6 RE |
604 | } |
605 | ||
924acc54 | 606 | if (!p7->detached) |
dfeab068 RE |
607 | { |
608 | btmp=BIO_find_type(bio,BIO_TYPE_MEM); | |
609 | if (btmp == NULL) | |
610 | { | |
611 | PKCS7err(PKCS7_F_PKCS7_DATASIGN,PKCS7_R_UNABLE_TO_FIND_MEM_BIO); | |
612 | goto err; | |
613 | } | |
614 | BIO_get_mem_ptr(btmp,&buf_mem); | |
615 | ASN1_OCTET_STRING_set(os, | |
616 | (unsigned char *)buf_mem->data,buf_mem->length); | |
617 | } | |
618 | if (pp != NULL) Free(pp); | |
619 | pp=NULL; | |
620 | ||
d02b48c6 RE |
621 | ret=1; |
622 | err: | |
623 | if (buf != NULL) BUF_MEM_free(buf); | |
624 | return(ret); | |
625 | } | |
626 | ||
6b691a5c UM |
627 | int PKCS7_dataVerify(X509_STORE *cert_store, X509_STORE_CTX *ctx, BIO *bio, |
628 | PKCS7 *p7, PKCS7_SIGNER_INFO *si) | |
d02b48c6 | 629 | { |
dfeab068 | 630 | /* PKCS7_SIGNED *s; */ |
d02b48c6 RE |
631 | ASN1_OCTET_STRING *os; |
632 | EVP_MD_CTX mdc_tmp,*mdc; | |
633 | unsigned char *pp,*p; | |
634 | PKCS7_ISSUER_AND_SERIAL *ias; | |
dfeab068 RE |
635 | int ret=0,i; |
636 | int md_type; | |
f73e07cf BL |
637 | STACK *sk; |
638 | STACK_OF(X509) *cert; | |
d02b48c6 RE |
639 | BIO *btmp; |
640 | X509 *x509; | |
924acc54 | 641 | EVP_PKEY *pkey; |
d02b48c6 | 642 | |
dfeab068 RE |
643 | if (PKCS7_type_is_signed(p7)) |
644 | { | |
645 | cert=p7->d.sign->cert; | |
646 | } | |
647 | else if (PKCS7_type_is_signedAndEnveloped(p7)) | |
648 | { | |
649 | cert=p7->d.signed_and_enveloped->cert; | |
650 | } | |
651 | else | |
652 | { | |
653 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_WRONG_PKCS7_TYPE); | |
654 | goto err; | |
655 | } | |
58964a49 | 656 | /* XXXXXXXXXXXXXXXXXXXXXXX */ |
d02b48c6 | 657 | ias=si->issuer_and_serial; |
d02b48c6 | 658 | |
dfeab068 | 659 | x509=X509_find_by_issuer_and_serial(cert,ias->issuer,ias->serial); |
d02b48c6 RE |
660 | |
661 | /* were we able to find the cert in passed to us */ | |
662 | if (x509 == NULL) | |
663 | { | |
664 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_CERTIFICATE); | |
665 | goto err; | |
666 | } | |
667 | ||
668 | /* Lets verify */ | |
dfeab068 | 669 | X509_STORE_CTX_init(ctx,cert_store,x509,cert); |
d02b48c6 | 670 | i=X509_verify_cert(ctx); |
dfeab068 RE |
671 | if (i <= 0) |
672 | { | |
673 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,ERR_R_X509_LIB); | |
674 | goto err; | |
675 | } | |
d02b48c6 RE |
676 | X509_STORE_CTX_cleanup(ctx); |
677 | ||
678 | /* So we like 'x509', lets check the signature. */ | |
679 | md_type=OBJ_obj2nid(si->digest_alg->algorithm); | |
680 | ||
681 | btmp=bio; | |
682 | for (;;) | |
683 | { | |
684 | if ((btmp == NULL) || | |
685 | ((btmp=BIO_find_type(btmp,BIO_TYPE_MD)) == NULL)) | |
686 | { | |
687 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST); | |
688 | goto err; | |
689 | } | |
690 | BIO_get_md_ctx(btmp,&mdc); | |
691 | if (mdc == NULL) | |
692 | { | |
693 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_INTERNAL_ERROR); | |
694 | goto err; | |
695 | } | |
696 | if (EVP_MD_type(EVP_MD_CTX_type(mdc)) == md_type) | |
697 | break; | |
698 | btmp=btmp->next_bio; | |
699 | } | |
700 | ||
dfeab068 RE |
701 | /* mdc is the digest ctx that we want, unless there are attributes, |
702 | * in which case the digest is the signed attributes */ | |
d02b48c6 RE |
703 | memcpy(&mdc_tmp,mdc,sizeof(mdc_tmp)); |
704 | ||
705 | sk=si->auth_attr; | |
706 | if ((sk != NULL) && (sk_num(sk) != 0)) | |
707 | { | |
dfeab068 | 708 | unsigned char md_dat[EVP_MAX_MD_SIZE]; |
0b415fb0 | 709 | unsigned int md_len; |
dfeab068 RE |
710 | ASN1_OCTET_STRING *message_digest; |
711 | ||
712 | EVP_DigestFinal(&mdc_tmp,md_dat,&md_len); | |
713 | message_digest=PKCS7_digest_from_attributes(sk); | |
714 | if (!message_digest) | |
715 | { | |
716 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST); | |
717 | goto err; | |
718 | } | |
0b415fb0 | 719 | if ((message_digest->length != (int)md_len) || |
dfeab068 RE |
720 | (memcmp(message_digest->data,md_dat,md_len))) |
721 | { | |
722 | #if 0 | |
723 | { | |
724 | int ii; | |
725 | for (ii=0; ii<message_digest->length; ii++) | |
726 | printf("%02X",message_digest->data[ii]); printf(" sent\n"); | |
727 | for (ii=0; ii<md_len; ii++) printf("%02X",md_dat[ii]); printf(" calc\n"); | |
728 | } | |
729 | #endif | |
730 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_DIGEST_FAILURE); | |
731 | ret= -1; | |
732 | goto err; | |
733 | } | |
734 | ||
735 | EVP_VerifyInit(&mdc_tmp,EVP_get_digestbynid(md_type)); | |
924acc54 DSH |
736 | /* Note: when forming the encoding of the attributes we |
737 | * shouldn't reorder them or this will break the signature. | |
738 | * This is done by using the IS_SEQUENCE flag. | |
739 | */ | |
d02b48c6 | 740 | i=i2d_ASN1_SET(sk,NULL,i2d_X509_ATTRIBUTE, |
924acc54 | 741 | V_ASN1_SET,V_ASN1_UNIVERSAL, IS_SEQUENCE); |
dfeab068 | 742 | pp=(unsigned char *)Malloc(i); |
d02b48c6 RE |
743 | p=pp; |
744 | i2d_ASN1_SET(sk,&p,i2d_X509_ATTRIBUTE, | |
924acc54 | 745 | V_ASN1_SET,V_ASN1_UNIVERSAL, IS_SEQUENCE); |
d02b48c6 | 746 | EVP_VerifyUpdate(&mdc_tmp,pp,i); |
924acc54 | 747 | |
dfeab068 | 748 | Free(pp); |
d02b48c6 RE |
749 | } |
750 | ||
751 | os=si->enc_digest; | |
924acc54 DSH |
752 | pkey = X509_get_pubkey(x509); |
753 | if(pkey->type == EVP_PKEY_DSA) mdc_tmp.digest=EVP_dss1(); | |
dfeab068 | 754 | |
924acc54 DSH |
755 | i=EVP_VerifyFinal(&mdc_tmp,os->data,os->length, pkey); |
756 | EVP_PKEY_free(pkey); | |
d02b48c6 RE |
757 | if (i <= 0) |
758 | { | |
759 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_SIGNATURE_FAILURE); | |
760 | ret= -1; | |
761 | goto err; | |
762 | } | |
763 | else | |
764 | ret=1; | |
765 | err: | |
766 | return(ret); | |
767 | } | |
768 | ||
6b691a5c | 769 | PKCS7_ISSUER_AND_SERIAL *PKCS7_get_issuer_and_serial(PKCS7 *p7, int idx) |
dfeab068 RE |
770 | { |
771 | STACK *rsk; | |
772 | PKCS7_RECIP_INFO *ri; | |
773 | int i; | |
774 | ||
775 | i=OBJ_obj2nid(p7->type); | |
776 | if (i != NID_pkcs7_signedAndEnveloped) return(NULL); | |
777 | rsk=p7->d.signed_and_enveloped->recipientinfo; | |
778 | ri=(PKCS7_RECIP_INFO *)sk_value(rsk,0); | |
779 | if (sk_num(rsk) <= idx) return(NULL); | |
780 | ri=(PKCS7_RECIP_INFO *)sk_value(rsk,idx); | |
781 | return(ri->issuer_and_serial); | |
782 | } | |
783 | ||
6b691a5c | 784 | ASN1_TYPE *PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO *si, int nid) |
dfeab068 RE |
785 | { |
786 | return(get_attribute(si->auth_attr,nid)); | |
787 | } | |
788 | ||
6b691a5c | 789 | ASN1_TYPE *PKCS7_get_attribute(PKCS7_SIGNER_INFO *si, int nid) |
dfeab068 RE |
790 | { |
791 | return(get_attribute(si->unauth_attr,nid)); | |
792 | } | |
793 | ||
6b691a5c | 794 | static ASN1_TYPE *get_attribute(STACK *sk, int nid) |
dfeab068 RE |
795 | { |
796 | int i; | |
797 | X509_ATTRIBUTE *xa; | |
798 | ASN1_OBJECT *o; | |
799 | ||
800 | o=OBJ_nid2obj(nid); | |
801 | if (o == NULL) return(NULL); | |
802 | for (i=0; i<sk_num(sk); i++) | |
803 | { | |
804 | xa=(X509_ATTRIBUTE *)sk_value(sk,i); | |
805 | if (OBJ_cmp(xa->object,o) == 0) | |
806 | { | |
d35ea5b0 BL |
807 | if (xa->set && sk_ASN1_TYPE_num(xa->value.set)) |
808 | return(sk_ASN1_TYPE_value(xa->value.set,0)); | |
dfeab068 RE |
809 | else |
810 | return(NULL); | |
811 | } | |
812 | } | |
813 | return(NULL); | |
814 | } | |
815 | ||
6b691a5c | 816 | ASN1_OCTET_STRING *PKCS7_digest_from_attributes(STACK *sk) |
dfeab068 RE |
817 | { |
818 | X509_ATTRIBUTE *attr; | |
819 | ASN1_TYPE *astype; | |
820 | int i; | |
821 | if (!sk || !sk_num(sk)) return NULL; | |
822 | /* Search the attributes for a digest */ | |
823 | for (i = 0; i < sk_num(sk); i++) | |
824 | { | |
825 | attr = (X509_ATTRIBUTE *) sk_value(sk, i); | |
826 | if (OBJ_obj2nid(attr->object) == NID_pkcs9_messageDigest) | |
827 | { | |
828 | if (!attr->set) return NULL; | |
d35ea5b0 BL |
829 | if (!attr->value.set |
830 | || !sk_ASN1_TYPE_num(attr->value.set) ) | |
831 | return NULL; | |
832 | astype = sk_ASN1_TYPE_value(attr->value.set, 0); | |
dfeab068 RE |
833 | return astype->value.octet_string; |
834 | } | |
835 | } | |
836 | return NULL; | |
837 | } | |
838 | ||
6b691a5c | 839 | int PKCS7_set_signed_attributes(PKCS7_SIGNER_INFO *p7si, STACK *sk) |
dfeab068 RE |
840 | { |
841 | int i; | |
842 | ||
843 | if (p7si->auth_attr != NULL) | |
844 | sk_pop_free(p7si->auth_attr,X509_ATTRIBUTE_free); | |
845 | p7si->auth_attr=sk_dup(sk); | |
846 | for (i=0; i<sk_num(sk); i++) | |
847 | { | |
848 | if ((sk_value(p7si->auth_attr,i)=(char *)X509_ATTRIBUTE_dup( | |
849 | (X509_ATTRIBUTE *)sk_value(sk,i))) == NULL) | |
850 | return(0); | |
851 | } | |
852 | return(1); | |
853 | } | |
854 | ||
6b691a5c | 855 | int PKCS7_set_attributes(PKCS7_SIGNER_INFO *p7si, STACK *sk) |
dfeab068 RE |
856 | { |
857 | int i; | |
858 | ||
859 | if (p7si->unauth_attr != NULL) | |
860 | sk_pop_free(p7si->unauth_attr,X509_ATTRIBUTE_free); | |
861 | p7si->unauth_attr=sk_dup(sk); | |
862 | for (i=0; i<sk_num(sk); i++) | |
863 | { | |
864 | if ((sk_value(p7si->unauth_attr,i)=(char *)X509_ATTRIBUTE_dup( | |
865 | (X509_ATTRIBUTE *)sk_value(sk,i))) == NULL) | |
866 | return(0); | |
867 | } | |
868 | return(1); | |
869 | } | |
870 | ||
6b691a5c | 871 | int PKCS7_add_signed_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype, |
c8b41850 | 872 | void *value) |
dfeab068 RE |
873 | { |
874 | return(add_attribute(&(p7si->auth_attr),nid,atrtype,value)); | |
875 | } | |
876 | ||
6b691a5c | 877 | int PKCS7_add_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype, |
c8b41850 | 878 | void *value) |
dfeab068 RE |
879 | { |
880 | return(add_attribute(&(p7si->unauth_attr),nid,atrtype,value)); | |
881 | } | |
882 | ||
c8b41850 | 883 | static int add_attribute(STACK **sk, int nid, int atrtype, void *value) |
dfeab068 RE |
884 | { |
885 | X509_ATTRIBUTE *attr=NULL; | |
dfeab068 RE |
886 | |
887 | if (*sk == NULL) | |
888 | { | |
889 | *sk = sk_new(NULL); | |
890 | new_attrib: | |
891 | attr=X509_ATTRIBUTE_create(nid,atrtype,value); | |
892 | sk_push(*sk,(char *)attr); | |
893 | } | |
894 | else | |
895 | { | |
896 | int i; | |
897 | ||
898 | for (i=0; i<sk_num(*sk); i++) | |
899 | { | |
900 | attr=(X509_ATTRIBUTE *)sk_value(*sk,i); | |
901 | if (OBJ_obj2nid(attr->object) == nid) | |
902 | { | |
903 | X509_ATTRIBUTE_free(attr); | |
904 | attr=X509_ATTRIBUTE_create(nid,atrtype,value); | |
905 | sk_value(*sk,i)=(char *)attr; | |
906 | goto end; | |
907 | } | |
908 | } | |
909 | goto new_attrib; | |
910 | } | |
911 | end: | |
912 | return(1); | |
913 | } | |
914 |