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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 | |
dfeab068 RE |
65 | static int add_attribute(STACK **sk, int nid, int atrtype, char *value); |
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 | ||
159 | if (ivlen > 0) | |
160 | { | |
161 | ASN1_OCTET_STRING *os; | |
162 | ||
163 | RAND_bytes(iv,ivlen); | |
164 | os=ASN1_OCTET_STRING_new(); | |
165 | ASN1_OCTET_STRING_set(os,iv,ivlen); | |
dfeab068 RE |
166 | /* XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX this needs to change */ |
167 | if (xalg->parameter == NULL) | |
168 | xalg->parameter=ASN1_TYPE_new(); | |
169 | ASN1_TYPE_set(xalg->parameter,V_ASN1_OCTET_STRING, | |
58964a49 | 170 | (char *)os); |
dfeab068 | 171 | } |
58964a49 RE |
172 | RAND_bytes(key,keylen); |
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 RE |
209 | |
210 | BIO_set_cipher(btmp,evp_cipher,key,iv,1); | |
211 | ||
212 | if (out == NULL) | |
213 | out=btmp; | |
214 | else | |
215 | BIO_push(out,btmp); | |
dfeab068 | 216 | btmp=NULL; |
58964a49 RE |
217 | } |
218 | ||
219 | if (bio == NULL) /* ??????????? */ | |
d02b48c6 RE |
220 | { |
221 | if (p7->detached) | |
222 | bio=BIO_new(BIO_s_null()); | |
223 | else | |
224 | { | |
225 | bio=BIO_new(BIO_s_mem()); | |
dfeab068 RE |
226 | /* We need to set this so that when we have read all |
227 | * the data, the encrypt BIO, if present, will read | |
228 | * EOF and encode the last few bytes */ | |
229 | BIO_set_mem_eof_return(bio,0); | |
230 | ||
d02b48c6 RE |
231 | if (PKCS7_type_is_signed(p7) && |
232 | PKCS7_type_is_data(p7->d.sign->contents)) | |
233 | { | |
234 | ASN1_OCTET_STRING *os; | |
235 | ||
236 | os=p7->d.sign->contents->d.data; | |
237 | if (os->length > 0) | |
58964a49 RE |
238 | BIO_write(bio,(char *)os->data, |
239 | os->length); | |
d02b48c6 RE |
240 | } |
241 | } | |
242 | } | |
243 | BIO_push(out,bio); | |
dfeab068 RE |
244 | bio=NULL; |
245 | if (0) | |
246 | { | |
247 | err: | |
248 | if (out != NULL) | |
249 | BIO_free_all(out); | |
250 | if (btmp != NULL) | |
251 | BIO_free_all(btmp); | |
252 | out=NULL; | |
253 | } | |
d02b48c6 | 254 | return(out); |
dfeab068 RE |
255 | } |
256 | ||
257 | /* int */ | |
6b691a5c UM |
258 | BIO *PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio, |
259 | X509_STORE *xs) | |
dfeab068 RE |
260 | { |
261 | int i,j; | |
262 | BIO *out=NULL,*btmp=NULL,*etmp=NULL,*bio=NULL; | |
263 | char *tmp=NULL; | |
264 | X509_ALGOR *xa; | |
265 | ASN1_OCTET_STRING *data_body=NULL; | |
e778802f BL |
266 | const EVP_MD *evp_md; |
267 | const EVP_CIPHER *evp_cipher=NULL; | |
dfeab068 RE |
268 | EVP_CIPHER_CTX *evp_ctx=NULL; |
269 | X509_ALGOR *enc_alg=NULL; | |
270 | STACK *md_sk=NULL,*rsk=NULL; | |
271 | X509_ALGOR *xalg=NULL; | |
272 | PKCS7_RECIP_INFO *ri=NULL; | |
273 | /* EVP_PKEY *pkey; */ | |
274 | #if 0 | |
275 | X509_STORE_CTX s_ctx; | |
276 | #endif | |
277 | ||
278 | i=OBJ_obj2nid(p7->type); | |
279 | p7->state=PKCS7_S_HEADER; | |
280 | ||
281 | switch (i) | |
282 | { | |
283 | case NID_pkcs7_signed: | |
284 | data_body=p7->d.sign->contents->d.data; | |
285 | md_sk=p7->d.sign->md_algs; | |
286 | break; | |
287 | case NID_pkcs7_signedAndEnveloped: | |
288 | rsk=p7->d.signed_and_enveloped->recipientinfo; | |
289 | md_sk=p7->d.signed_and_enveloped->md_algs; | |
290 | data_body=p7->d.signed_and_enveloped->enc_data->enc_data; | |
291 | enc_alg=p7->d.signed_and_enveloped->enc_data->algorithm; | |
292 | evp_cipher=EVP_get_cipherbyname(OBJ_nid2sn(OBJ_obj2nid(enc_alg->algorithm))); | |
293 | if (evp_cipher == NULL) | |
294 | { | |
295 | PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,PKCS7_R_UNSUPPORTED_CIPHER_TYPE); | |
296 | goto err; | |
297 | } | |
298 | xalg=p7->d.signed_and_enveloped->enc_data->algorithm; | |
299 | break; | |
300 | case NID_pkcs7_enveloped: | |
301 | rsk=p7->d.enveloped->recipientinfo; | |
302 | enc_alg=p7->d.enveloped->enc_data->algorithm; | |
303 | data_body=p7->d.enveloped->enc_data->enc_data; | |
304 | evp_cipher=EVP_get_cipherbyname(OBJ_nid2sn(OBJ_obj2nid(enc_alg->algorithm))); | |
305 | if (evp_cipher == NULL) | |
306 | { | |
307 | PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,PKCS7_R_UNSUPPORTED_CIPHER_TYPE); | |
308 | goto err; | |
309 | } | |
310 | xalg=p7->d.enveloped->enc_data->algorithm; | |
311 | break; | |
312 | default: | |
313 | PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE); | |
314 | goto err; | |
315 | } | |
316 | ||
317 | /* We will be checking the signature */ | |
318 | if (md_sk != NULL) | |
319 | { | |
320 | for (i=0; i<sk_num(md_sk); i++) | |
321 | { | |
322 | xa=(X509_ALGOR *)sk_value(md_sk,i); | |
323 | if ((btmp=BIO_new(BIO_f_md())) == NULL) | |
324 | { | |
325 | PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,ERR_R_BIO_LIB); | |
326 | goto err; | |
327 | } | |
328 | ||
329 | j=OBJ_obj2nid(xa->algorithm); | |
330 | evp_md=EVP_get_digestbyname(OBJ_nid2sn(j)); | |
331 | if (evp_md == NULL) | |
332 | { | |
333 | PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,PKCS7_R_UNKNOWN_DIGEST_TYPE); | |
334 | goto err; | |
335 | } | |
336 | ||
337 | BIO_set_md(btmp,evp_md); | |
338 | if (out == NULL) | |
339 | out=btmp; | |
340 | else | |
341 | BIO_push(out,btmp); | |
342 | btmp=NULL; | |
343 | } | |
344 | } | |
345 | ||
346 | if (evp_cipher != NULL) | |
347 | { | |
348 | #if 0 | |
349 | unsigned char key[EVP_MAX_KEY_LENGTH]; | |
350 | unsigned char iv[EVP_MAX_IV_LENGTH]; | |
351 | unsigned char *p; | |
352 | int keylen,ivlen; | |
353 | int max; | |
354 | X509_OBJECT ret; | |
355 | #endif | |
356 | int jj; | |
357 | ||
358 | if ((etmp=BIO_new(BIO_f_cipher())) == NULL) | |
359 | { | |
360 | PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,ERR_R_BIO_LIB); | |
361 | goto err; | |
362 | } | |
363 | ||
364 | /* It was encrypted, we need to decrypt the secret key | |
365 | * with the private key */ | |
366 | ||
367 | /* We need to find a private key for one of the people in the | |
368 | * recipentinfo list */ | |
369 | if (rsk == NULL) | |
370 | return(NULL); | |
371 | ||
372 | ri=(PKCS7_RECIP_INFO *)sk_value(rsk,0); | |
373 | #if 0 | |
374 | X509_STORE_CTX_init(&s_ctx,xs,NULL,NULL); | |
375 | for (i=0; i<sk_num(rsk); i++) | |
376 | { | |
377 | ri=(PKCS7_RECIP_INFO *)sk_value(rsk,i); | |
378 | uf (X509_STORE_get_by_issuer_serial(&s_ctx, | |
379 | X509_LU_PKEY, | |
380 | ri->issuer_and_serial->issuer, | |
381 | ri->issuer_and_serial->serial, | |
382 | &ret)) | |
383 | break; | |
384 | ri=NULL; | |
385 | } | |
386 | if (ri == NULL) return(NULL); | |
387 | pkey=ret.data.pkey; | |
388 | #endif | |
389 | if (pkey == NULL) | |
390 | { | |
391 | return(NULL); | |
392 | } | |
393 | ||
394 | jj=EVP_PKEY_size(pkey); | |
395 | tmp=Malloc(jj+10); | |
396 | if (tmp == NULL) | |
397 | { | |
398 | PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,ERR_R_MALLOC_FAILURE); | |
399 | goto err; | |
400 | } | |
401 | ||
402 | jj=EVP_PKEY_decrypt((unsigned char *)tmp, | |
403 | ASN1_STRING_data(ri->enc_key), | |
404 | ASN1_STRING_length(ri->enc_key), | |
405 | pkey); | |
406 | if (jj <= 0) | |
407 | { | |
408 | PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,ERR_R_EVP_LIB); | |
409 | goto err; | |
410 | } | |
411 | ||
412 | evp_ctx=NULL; | |
413 | BIO_get_cipher_ctx(etmp,&evp_ctx); | |
414 | EVP_CipherInit(evp_ctx,evp_cipher,NULL,NULL,0); | |
415 | if (EVP_CIPHER_asn1_to_param(evp_ctx,enc_alg->parameter) < 0) | |
416 | return(NULL); | |
417 | ||
418 | if (jj != EVP_CIPHER_CTX_key_length(evp_ctx)) | |
419 | { | |
420 | PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,PKCS7_R_DECRYPTED_KEY_IS_WRONG_LENGTH); | |
421 | goto err; | |
422 | } | |
423 | EVP_CipherInit(evp_ctx,NULL,(unsigned char *)tmp,NULL,0); | |
424 | ||
425 | memset(tmp,0,jj); | |
426 | ||
427 | if (out == NULL) | |
428 | out=etmp; | |
429 | else | |
430 | BIO_push(out,etmp); | |
431 | etmp=NULL; | |
432 | } | |
433 | ||
434 | #if 1 | |
435 | if (p7->detached || (in_bio != NULL)) | |
436 | { | |
437 | bio=in_bio; | |
438 | } | |
439 | else | |
440 | { | |
441 | bio=BIO_new(BIO_s_mem()); | |
442 | /* We need to set this so that when we have read all | |
443 | * the data, the encrypt BIO, if present, will read | |
444 | * EOF and encode the last few bytes */ | |
445 | BIO_set_mem_eof_return(bio,0); | |
446 | ||
447 | if (data_body->length > 0) | |
448 | BIO_write(bio,(char *)data_body->data,data_body->length); | |
449 | } | |
450 | BIO_push(out,bio); | |
451 | bio=NULL; | |
452 | #endif | |
453 | if (0) | |
454 | { | |
d02b48c6 | 455 | err: |
dfeab068 RE |
456 | if (out != NULL) BIO_free_all(out); |
457 | if (btmp != NULL) BIO_free_all(btmp); | |
458 | if (etmp != NULL) BIO_free_all(etmp); | |
459 | if (bio != NULL) BIO_free_all(bio); | |
460 | out=NULL; | |
461 | } | |
462 | if (tmp != NULL) | |
463 | Free(tmp); | |
464 | return(out); | |
d02b48c6 | 465 | } |
dfeab068 | 466 | #endif |
d02b48c6 | 467 | |
6b691a5c | 468 | int PKCS7_dataFinal(PKCS7 *p7, BIO *bio) |
d02b48c6 RE |
469 | { |
470 | int ret=0; | |
471 | int i,j; | |
472 | BIO *btmp; | |
473 | BUF_MEM *buf_mem=NULL; | |
474 | BUF_MEM *buf=NULL; | |
475 | PKCS7_SIGNER_INFO *si; | |
476 | EVP_MD_CTX *mdc,ctx_tmp; | |
58964a49 | 477 | STACK *sk,*si_sk=NULL; |
d02b48c6 RE |
478 | unsigned char *p,*pp=NULL; |
479 | int x; | |
58964a49 | 480 | ASN1_OCTET_STRING *os=NULL; |
d02b48c6 RE |
481 | |
482 | i=OBJ_obj2nid(p7->type); | |
483 | p7->state=PKCS7_S_HEADER; | |
484 | ||
485 | switch (i) | |
486 | { | |
58964a49 RE |
487 | case NID_pkcs7_signedAndEnveloped: |
488 | /* XXXXXXXXXXXXXXXX */ | |
489 | si_sk=p7->d.signed_and_enveloped->signer_info; | |
490 | os=ASN1_OCTET_STRING_new(); | |
491 | p7->d.signed_and_enveloped->enc_data->enc_data=os; | |
492 | break; | |
dfeab068 RE |
493 | case NID_pkcs7_enveloped: |
494 | /* XXXXXXXXXXXXXXXX */ | |
495 | os=ASN1_OCTET_STRING_new(); | |
496 | p7->d.enveloped->enc_data->enc_data=os; | |
497 | break; | |
d02b48c6 | 498 | case NID_pkcs7_signed: |
58964a49 RE |
499 | si_sk=p7->d.sign->signer_info; |
500 | os=p7->d.sign->contents->d.data; | |
924acc54 DSH |
501 | /* If detached data then the content is excluded */ |
502 | if(p7->detached) { | |
503 | ASN1_OCTET_STRING_free(os); | |
504 | p7->d.sign->contents->d.data = NULL; | |
505 | } | |
58964a49 RE |
506 | break; |
507 | } | |
d02b48c6 | 508 | |
58964a49 RE |
509 | if (si_sk != NULL) |
510 | { | |
dfeab068 RE |
511 | if ((buf=BUF_MEM_new()) == NULL) |
512 | { | |
513 | PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_BIO_LIB); | |
514 | goto err; | |
515 | } | |
58964a49 | 516 | for (i=0; i<sk_num(si_sk); i++) |
d02b48c6 RE |
517 | { |
518 | si=(PKCS7_SIGNER_INFO *) | |
58964a49 | 519 | sk_value(si_sk,i); |
dfeab068 RE |
520 | if (si->pkey == NULL) continue; |
521 | ||
522 | j=OBJ_obj2nid(si->digest_alg->algorithm); | |
d02b48c6 RE |
523 | |
524 | btmp=bio; | |
525 | for (;;) | |
526 | { | |
527 | if ((btmp=BIO_find_type(btmp,BIO_TYPE_MD)) | |
528 | == NULL) | |
529 | { | |
58964a49 | 530 | PKCS7err(PKCS7_F_PKCS7_DATASIGN,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST); |
d02b48c6 RE |
531 | goto err; |
532 | } | |
533 | BIO_get_md_ctx(btmp,&mdc); | |
534 | if (mdc == NULL) | |
535 | { | |
58964a49 | 536 | PKCS7err(PKCS7_F_PKCS7_DATASIGN,PKCS7_R_INTERNAL_ERROR); |
d02b48c6 RE |
537 | goto err; |
538 | } | |
dfeab068 | 539 | if (EVP_MD_type(EVP_MD_CTX_type(mdc)) == j) |
d02b48c6 RE |
540 | break; |
541 | else | |
542 | btmp=btmp->next_bio; | |
543 | } | |
544 | ||
545 | /* We now have the EVP_MD_CTX, lets do the | |
546 | * signing. */ | |
547 | memcpy(&ctx_tmp,mdc,sizeof(ctx_tmp)); | |
548 | if (!BUF_MEM_grow(buf,EVP_PKEY_size(si->pkey))) | |
dfeab068 RE |
549 | { |
550 | PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_BIO_LIB); | |
d02b48c6 | 551 | goto err; |
dfeab068 | 552 | } |
d02b48c6 RE |
553 | |
554 | sk=si->auth_attr; | |
dfeab068 RE |
555 | |
556 | /* If there are attributes, we add the digest | |
557 | * attribute and only sign the attributes */ | |
d02b48c6 RE |
558 | if ((sk != NULL) && (sk_num(sk) != 0)) |
559 | { | |
dfeab068 RE |
560 | unsigned char md_data[EVP_MAX_MD_SIZE]; |
561 | unsigned int md_len; | |
562 | ASN1_OCTET_STRING *digest; | |
563 | ASN1_UTCTIME *sign_time; | |
e778802f | 564 | const EVP_MD *md_tmp; |
dfeab068 RE |
565 | |
566 | /* Add signing time */ | |
567 | sign_time=X509_gmtime_adj(NULL,0); | |
568 | PKCS7_add_signed_attribute(si, | |
569 | NID_pkcs9_signingTime, | |
570 | V_ASN1_UTCTIME,(char *)sign_time); | |
571 | ||
572 | /* Add digest */ | |
573 | md_tmp=EVP_MD_CTX_type(&ctx_tmp); | |
574 | EVP_DigestFinal(&ctx_tmp,md_data,&md_len); | |
575 | digest=ASN1_OCTET_STRING_new(); | |
576 | ASN1_OCTET_STRING_set(digest,md_data,md_len); | |
577 | PKCS7_add_signed_attribute(si,NID_pkcs9_messageDigest, | |
578 | V_ASN1_OCTET_STRING,(char *)digest); | |
579 | ||
580 | /* Now sign the mess */ | |
581 | EVP_SignInit(&ctx_tmp,md_tmp); | |
d02b48c6 | 582 | x=i2d_ASN1_SET(sk,NULL,i2d_X509_ATTRIBUTE, |
0c106d75 | 583 | V_ASN1_SET,V_ASN1_UNIVERSAL, IS_SET); |
dfeab068 | 584 | pp=(unsigned char *)Malloc(x); |
d02b48c6 RE |
585 | p=pp; |
586 | i2d_ASN1_SET(sk,&p,i2d_X509_ATTRIBUTE, | |
0c106d75 | 587 | V_ASN1_SET,V_ASN1_UNIVERSAL, IS_SET); |
d02b48c6 RE |
588 | EVP_SignUpdate(&ctx_tmp,pp,x); |
589 | Free(pp); | |
dfeab068 | 590 | pp=NULL; |
d02b48c6 RE |
591 | } |
592 | ||
dfeab068 RE |
593 | if (si->pkey->type == EVP_PKEY_DSA) |
594 | ctx_tmp.digest=EVP_dss1(); | |
595 | ||
58964a49 | 596 | if (!EVP_SignFinal(&ctx_tmp,(unsigned char *)buf->data, |
d02b48c6 | 597 | (unsigned int *)&buf->length,si->pkey)) |
dfeab068 RE |
598 | { |
599 | PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_EVP_LIB); | |
d02b48c6 | 600 | goto err; |
dfeab068 | 601 | } |
d02b48c6 RE |
602 | if (!ASN1_STRING_set(si->enc_digest, |
603 | (unsigned char *)buf->data,buf->length)) | |
d02b48c6 | 604 | { |
dfeab068 | 605 | PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_ASN1_LIB); |
d02b48c6 RE |
606 | goto err; |
607 | } | |
d02b48c6 | 608 | } |
d02b48c6 RE |
609 | } |
610 | ||
924acc54 | 611 | if (!p7->detached) |
dfeab068 RE |
612 | { |
613 | btmp=BIO_find_type(bio,BIO_TYPE_MEM); | |
614 | if (btmp == NULL) | |
615 | { | |
616 | PKCS7err(PKCS7_F_PKCS7_DATASIGN,PKCS7_R_UNABLE_TO_FIND_MEM_BIO); | |
617 | goto err; | |
618 | } | |
619 | BIO_get_mem_ptr(btmp,&buf_mem); | |
620 | ASN1_OCTET_STRING_set(os, | |
621 | (unsigned char *)buf_mem->data,buf_mem->length); | |
622 | } | |
623 | if (pp != NULL) Free(pp); | |
624 | pp=NULL; | |
625 | ||
d02b48c6 RE |
626 | ret=1; |
627 | err: | |
628 | if (buf != NULL) BUF_MEM_free(buf); | |
629 | return(ret); | |
630 | } | |
631 | ||
6b691a5c UM |
632 | int PKCS7_dataVerify(X509_STORE *cert_store, X509_STORE_CTX *ctx, BIO *bio, |
633 | PKCS7 *p7, PKCS7_SIGNER_INFO *si) | |
d02b48c6 | 634 | { |
dfeab068 | 635 | /* PKCS7_SIGNED *s; */ |
d02b48c6 RE |
636 | ASN1_OCTET_STRING *os; |
637 | EVP_MD_CTX mdc_tmp,*mdc; | |
638 | unsigned char *pp,*p; | |
639 | PKCS7_ISSUER_AND_SERIAL *ias; | |
dfeab068 RE |
640 | int ret=0,i; |
641 | int md_type; | |
f73e07cf BL |
642 | STACK *sk; |
643 | STACK_OF(X509) *cert; | |
d02b48c6 RE |
644 | BIO *btmp; |
645 | X509 *x509; | |
924acc54 | 646 | EVP_PKEY *pkey; |
d02b48c6 | 647 | |
dfeab068 RE |
648 | if (PKCS7_type_is_signed(p7)) |
649 | { | |
650 | cert=p7->d.sign->cert; | |
651 | } | |
652 | else if (PKCS7_type_is_signedAndEnveloped(p7)) | |
653 | { | |
654 | cert=p7->d.signed_and_enveloped->cert; | |
655 | } | |
656 | else | |
657 | { | |
658 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_WRONG_PKCS7_TYPE); | |
659 | goto err; | |
660 | } | |
58964a49 | 661 | /* XXXXXXXXXXXXXXXXXXXXXXX */ |
d02b48c6 | 662 | ias=si->issuer_and_serial; |
d02b48c6 | 663 | |
dfeab068 | 664 | x509=X509_find_by_issuer_and_serial(cert,ias->issuer,ias->serial); |
d02b48c6 RE |
665 | |
666 | /* were we able to find the cert in passed to us */ | |
667 | if (x509 == NULL) | |
668 | { | |
669 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_CERTIFICATE); | |
670 | goto err; | |
671 | } | |
672 | ||
673 | /* Lets verify */ | |
dfeab068 | 674 | X509_STORE_CTX_init(ctx,cert_store,x509,cert); |
d02b48c6 | 675 | i=X509_verify_cert(ctx); |
dfeab068 RE |
676 | if (i <= 0) |
677 | { | |
678 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,ERR_R_X509_LIB); | |
679 | goto err; | |
680 | } | |
d02b48c6 RE |
681 | X509_STORE_CTX_cleanup(ctx); |
682 | ||
683 | /* So we like 'x509', lets check the signature. */ | |
684 | md_type=OBJ_obj2nid(si->digest_alg->algorithm); | |
685 | ||
686 | btmp=bio; | |
687 | for (;;) | |
688 | { | |
689 | if ((btmp == NULL) || | |
690 | ((btmp=BIO_find_type(btmp,BIO_TYPE_MD)) == NULL)) | |
691 | { | |
692 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST); | |
693 | goto err; | |
694 | } | |
695 | BIO_get_md_ctx(btmp,&mdc); | |
696 | if (mdc == NULL) | |
697 | { | |
698 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_INTERNAL_ERROR); | |
699 | goto err; | |
700 | } | |
701 | if (EVP_MD_type(EVP_MD_CTX_type(mdc)) == md_type) | |
702 | break; | |
703 | btmp=btmp->next_bio; | |
704 | } | |
705 | ||
dfeab068 RE |
706 | /* mdc is the digest ctx that we want, unless there are attributes, |
707 | * in which case the digest is the signed attributes */ | |
d02b48c6 RE |
708 | memcpy(&mdc_tmp,mdc,sizeof(mdc_tmp)); |
709 | ||
710 | sk=si->auth_attr; | |
711 | if ((sk != NULL) && (sk_num(sk) != 0)) | |
712 | { | |
dfeab068 | 713 | unsigned char md_dat[EVP_MAX_MD_SIZE]; |
0b415fb0 | 714 | unsigned int md_len; |
dfeab068 RE |
715 | ASN1_OCTET_STRING *message_digest; |
716 | ||
717 | EVP_DigestFinal(&mdc_tmp,md_dat,&md_len); | |
718 | message_digest=PKCS7_digest_from_attributes(sk); | |
719 | if (!message_digest) | |
720 | { | |
721 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST); | |
722 | goto err; | |
723 | } | |
0b415fb0 | 724 | if ((message_digest->length != (int)md_len) || |
dfeab068 RE |
725 | (memcmp(message_digest->data,md_dat,md_len))) |
726 | { | |
727 | #if 0 | |
728 | { | |
729 | int ii; | |
730 | for (ii=0; ii<message_digest->length; ii++) | |
731 | printf("%02X",message_digest->data[ii]); printf(" sent\n"); | |
732 | for (ii=0; ii<md_len; ii++) printf("%02X",md_dat[ii]); printf(" calc\n"); | |
733 | } | |
734 | #endif | |
735 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_DIGEST_FAILURE); | |
736 | ret= -1; | |
737 | goto err; | |
738 | } | |
739 | ||
740 | EVP_VerifyInit(&mdc_tmp,EVP_get_digestbynid(md_type)); | |
924acc54 DSH |
741 | /* Note: when forming the encoding of the attributes we |
742 | * shouldn't reorder them or this will break the signature. | |
743 | * This is done by using the IS_SEQUENCE flag. | |
744 | */ | |
d02b48c6 | 745 | i=i2d_ASN1_SET(sk,NULL,i2d_X509_ATTRIBUTE, |
924acc54 | 746 | V_ASN1_SET,V_ASN1_UNIVERSAL, IS_SEQUENCE); |
dfeab068 | 747 | pp=(unsigned char *)Malloc(i); |
d02b48c6 RE |
748 | p=pp; |
749 | i2d_ASN1_SET(sk,&p,i2d_X509_ATTRIBUTE, | |
924acc54 | 750 | V_ASN1_SET,V_ASN1_UNIVERSAL, IS_SEQUENCE); |
d02b48c6 | 751 | EVP_VerifyUpdate(&mdc_tmp,pp,i); |
924acc54 | 752 | |
dfeab068 | 753 | Free(pp); |
d02b48c6 RE |
754 | } |
755 | ||
756 | os=si->enc_digest; | |
924acc54 DSH |
757 | pkey = X509_get_pubkey(x509); |
758 | if(pkey->type == EVP_PKEY_DSA) mdc_tmp.digest=EVP_dss1(); | |
dfeab068 | 759 | |
924acc54 DSH |
760 | i=EVP_VerifyFinal(&mdc_tmp,os->data,os->length, pkey); |
761 | EVP_PKEY_free(pkey); | |
d02b48c6 RE |
762 | if (i <= 0) |
763 | { | |
764 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_SIGNATURE_FAILURE); | |
765 | ret= -1; | |
766 | goto err; | |
767 | } | |
768 | else | |
769 | ret=1; | |
770 | err: | |
771 | return(ret); | |
772 | } | |
773 | ||
6b691a5c | 774 | PKCS7_ISSUER_AND_SERIAL *PKCS7_get_issuer_and_serial(PKCS7 *p7, int idx) |
dfeab068 RE |
775 | { |
776 | STACK *rsk; | |
777 | PKCS7_RECIP_INFO *ri; | |
778 | int i; | |
779 | ||
780 | i=OBJ_obj2nid(p7->type); | |
781 | if (i != NID_pkcs7_signedAndEnveloped) return(NULL); | |
782 | rsk=p7->d.signed_and_enveloped->recipientinfo; | |
783 | ri=(PKCS7_RECIP_INFO *)sk_value(rsk,0); | |
784 | if (sk_num(rsk) <= idx) return(NULL); | |
785 | ri=(PKCS7_RECIP_INFO *)sk_value(rsk,idx); | |
786 | return(ri->issuer_and_serial); | |
787 | } | |
788 | ||
6b691a5c | 789 | ASN1_TYPE *PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO *si, int nid) |
dfeab068 RE |
790 | { |
791 | return(get_attribute(si->auth_attr,nid)); | |
792 | } | |
793 | ||
6b691a5c | 794 | ASN1_TYPE *PKCS7_get_attribute(PKCS7_SIGNER_INFO *si, int nid) |
dfeab068 RE |
795 | { |
796 | return(get_attribute(si->unauth_attr,nid)); | |
797 | } | |
798 | ||
6b691a5c | 799 | static ASN1_TYPE *get_attribute(STACK *sk, int nid) |
dfeab068 RE |
800 | { |
801 | int i; | |
802 | X509_ATTRIBUTE *xa; | |
803 | ASN1_OBJECT *o; | |
804 | ||
805 | o=OBJ_nid2obj(nid); | |
806 | if (o == NULL) return(NULL); | |
807 | for (i=0; i<sk_num(sk); i++) | |
808 | { | |
809 | xa=(X509_ATTRIBUTE *)sk_value(sk,i); | |
810 | if (OBJ_cmp(xa->object,o) == 0) | |
811 | { | |
812 | if (xa->set && sk_num(xa->value.set)) | |
813 | return((ASN1_TYPE *)sk_value(xa->value.set,0)); | |
814 | else | |
815 | return(NULL); | |
816 | } | |
817 | } | |
818 | return(NULL); | |
819 | } | |
820 | ||
6b691a5c | 821 | ASN1_OCTET_STRING *PKCS7_digest_from_attributes(STACK *sk) |
dfeab068 RE |
822 | { |
823 | X509_ATTRIBUTE *attr; | |
824 | ASN1_TYPE *astype; | |
825 | int i; | |
826 | if (!sk || !sk_num(sk)) return NULL; | |
827 | /* Search the attributes for a digest */ | |
828 | for (i = 0; i < sk_num(sk); i++) | |
829 | { | |
830 | attr = (X509_ATTRIBUTE *) sk_value(sk, i); | |
831 | if (OBJ_obj2nid(attr->object) == NID_pkcs9_messageDigest) | |
832 | { | |
833 | if (!attr->set) return NULL; | |
834 | if (!attr->value.set || | |
835 | !sk_num (attr->value.set) ) return NULL; | |
836 | astype = (ASN1_TYPE *) sk_value(attr->value.set, 0); | |
837 | return astype->value.octet_string; | |
838 | } | |
839 | } | |
840 | return NULL; | |
841 | } | |
842 | ||
6b691a5c | 843 | int PKCS7_set_signed_attributes(PKCS7_SIGNER_INFO *p7si, STACK *sk) |
dfeab068 RE |
844 | { |
845 | int i; | |
846 | ||
847 | if (p7si->auth_attr != NULL) | |
848 | sk_pop_free(p7si->auth_attr,X509_ATTRIBUTE_free); | |
849 | p7si->auth_attr=sk_dup(sk); | |
850 | for (i=0; i<sk_num(sk); i++) | |
851 | { | |
852 | if ((sk_value(p7si->auth_attr,i)=(char *)X509_ATTRIBUTE_dup( | |
853 | (X509_ATTRIBUTE *)sk_value(sk,i))) == NULL) | |
854 | return(0); | |
855 | } | |
856 | return(1); | |
857 | } | |
858 | ||
6b691a5c | 859 | int PKCS7_set_attributes(PKCS7_SIGNER_INFO *p7si, STACK *sk) |
dfeab068 RE |
860 | { |
861 | int i; | |
862 | ||
863 | if (p7si->unauth_attr != NULL) | |
864 | sk_pop_free(p7si->unauth_attr,X509_ATTRIBUTE_free); | |
865 | p7si->unauth_attr=sk_dup(sk); | |
866 | for (i=0; i<sk_num(sk); i++) | |
867 | { | |
868 | if ((sk_value(p7si->unauth_attr,i)=(char *)X509_ATTRIBUTE_dup( | |
869 | (X509_ATTRIBUTE *)sk_value(sk,i))) == NULL) | |
870 | return(0); | |
871 | } | |
872 | return(1); | |
873 | } | |
874 | ||
6b691a5c UM |
875 | int PKCS7_add_signed_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype, |
876 | char *value) | |
dfeab068 RE |
877 | { |
878 | return(add_attribute(&(p7si->auth_attr),nid,atrtype,value)); | |
879 | } | |
880 | ||
6b691a5c UM |
881 | int PKCS7_add_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype, |
882 | char *value) | |
dfeab068 RE |
883 | { |
884 | return(add_attribute(&(p7si->unauth_attr),nid,atrtype,value)); | |
885 | } | |
886 | ||
6b691a5c | 887 | static int add_attribute(STACK **sk, int nid, int atrtype, char *value) |
dfeab068 RE |
888 | { |
889 | X509_ATTRIBUTE *attr=NULL; | |
dfeab068 RE |
890 | |
891 | if (*sk == NULL) | |
892 | { | |
893 | *sk = sk_new(NULL); | |
894 | new_attrib: | |
895 | attr=X509_ATTRIBUTE_create(nid,atrtype,value); | |
896 | sk_push(*sk,(char *)attr); | |
897 | } | |
898 | else | |
899 | { | |
900 | int i; | |
901 | ||
902 | for (i=0; i<sk_num(*sk); i++) | |
903 | { | |
904 | attr=(X509_ATTRIBUTE *)sk_value(*sk,i); | |
905 | if (OBJ_obj2nid(attr->object) == nid) | |
906 | { | |
907 | X509_ATTRIBUTE_free(attr); | |
908 | attr=X509_ATTRIBUTE_create(nid,atrtype,value); | |
909 | sk_value(*sk,i)=(char *)attr; | |
910 | goto end; | |
911 | } | |
912 | } | |
913 | goto new_attrib; | |
914 | } | |
915 | end: | |
916 | return(1); | |
917 | } | |
918 |