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Commit | Line | Data |
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8931b30d | 1 | /* crypto/cms/cms_env.c */ |
0f113f3e MC |
2 | /* |
3 | * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL | |
8931b30d DSH |
4 | * project. |
5 | */ | |
6 | /* ==================================================================== | |
7 | * Copyright (c) 2008 The OpenSSL Project. All rights reserved. | |
8 | * | |
9 | * Redistribution and use in source and binary forms, with or without | |
10 | * modification, are permitted provided that the following conditions | |
11 | * are met: | |
12 | * | |
13 | * 1. Redistributions of source code must retain the above copyright | |
0f113f3e | 14 | * notice, this list of conditions and the following disclaimer. |
8931b30d DSH |
15 | * |
16 | * 2. Redistributions in binary form must reproduce the above copyright | |
17 | * notice, this list of conditions and the following disclaimer in | |
18 | * the documentation and/or other materials provided with the | |
19 | * distribution. | |
20 | * | |
21 | * 3. All advertising materials mentioning features or use of this | |
22 | * software must display the following acknowledgment: | |
23 | * "This product includes software developed by the OpenSSL Project | |
24 | * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" | |
25 | * | |
26 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
27 | * endorse or promote products derived from this software without | |
28 | * prior written permission. For written permission, please contact | |
29 | * licensing@OpenSSL.org. | |
30 | * | |
31 | * 5. Products derived from this software may not be called "OpenSSL" | |
32 | * nor may "OpenSSL" appear in their names without prior written | |
33 | * permission of the OpenSSL Project. | |
34 | * | |
35 | * 6. Redistributions of any form whatsoever must retain the following | |
36 | * acknowledgment: | |
37 | * "This product includes software developed by the OpenSSL Project | |
38 | * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" | |
39 | * | |
40 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
41 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
42 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
43 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
44 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
45 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
46 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
47 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
49 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
50 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
51 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
52 | * ==================================================================== | |
53 | */ | |
54 | ||
55 | #include "cryptlib.h" | |
56 | #include <openssl/asn1t.h> | |
57 | #include <openssl/pem.h> | |
58 | #include <openssl/x509v3.h> | |
59 | #include <openssl/err.h> | |
60 | #include <openssl/cms.h> | |
5c4436c9 | 61 | #include <openssl/rand.h> |
6e3bc4f0 | 62 | #include <openssl/aes.h> |
8931b30d | 63 | #include "cms_lcl.h" |
5fe736e5 | 64 | #include "internal/asn1_int.h" |
8931b30d DSH |
65 | |
66 | /* CMS EnvelopedData Utilities */ | |
67 | ||
68 | DECLARE_ASN1_ITEM(CMS_EnvelopedData) | |
8931b30d | 69 | DECLARE_ASN1_ITEM(CMS_KeyTransRecipientInfo) |
c36e936b DSH |
70 | DECLARE_ASN1_ITEM(CMS_KEKRecipientInfo) |
71 | DECLARE_ASN1_ITEM(CMS_OtherKeyAttribute) | |
8931b30d | 72 | |
8931b30d DSH |
73 | DECLARE_STACK_OF(CMS_RecipientInfo) |
74 | ||
d2a53c22 | 75 | CMS_EnvelopedData *cms_get0_enveloped(CMS_ContentInfo *cms) |
0f113f3e MC |
76 | { |
77 | if (OBJ_obj2nid(cms->contentType) != NID_pkcs7_enveloped) { | |
78 | CMSerr(CMS_F_CMS_GET0_ENVELOPED, | |
79 | CMS_R_CONTENT_TYPE_NOT_ENVELOPED_DATA); | |
80 | return NULL; | |
81 | } | |
82 | return cms->d.envelopedData; | |
83 | } | |
8931b30d DSH |
84 | |
85 | static CMS_EnvelopedData *cms_enveloped_data_init(CMS_ContentInfo *cms) | |
0f113f3e MC |
86 | { |
87 | if (cms->d.other == NULL) { | |
88 | cms->d.envelopedData = M_ASN1_new_of(CMS_EnvelopedData); | |
89 | if (!cms->d.envelopedData) { | |
90 | CMSerr(CMS_F_CMS_ENVELOPED_DATA_INIT, ERR_R_MALLOC_FAILURE); | |
91 | return NULL; | |
92 | } | |
93 | cms->d.envelopedData->version = 0; | |
94 | cms->d.envelopedData->encryptedContentInfo->contentType = | |
95 | OBJ_nid2obj(NID_pkcs7_data); | |
96 | ASN1_OBJECT_free(cms->contentType); | |
97 | cms->contentType = OBJ_nid2obj(NID_pkcs7_enveloped); | |
98 | return cms->d.envelopedData; | |
99 | } | |
100 | return cms_get0_enveloped(cms); | |
101 | } | |
8931b30d | 102 | |
17c2764d | 103 | int cms_env_asn1_ctrl(CMS_RecipientInfo *ri, int cmd) |
0f113f3e MC |
104 | { |
105 | EVP_PKEY *pkey; | |
106 | int i; | |
107 | if (ri->type == CMS_RECIPINFO_TRANS) | |
108 | pkey = ri->d.ktri->pkey; | |
109 | else if (ri->type == CMS_RECIPINFO_AGREE) { | |
110 | EVP_PKEY_CTX *pctx = ri->d.kari->pctx; | |
111 | if (!pctx) | |
112 | return 0; | |
113 | pkey = EVP_PKEY_CTX_get0_pkey(pctx); | |
114 | if (!pkey) | |
115 | return 0; | |
116 | } else | |
117 | return 0; | |
118 | if (!pkey->ameth || !pkey->ameth->pkey_ctrl) | |
119 | return 1; | |
120 | i = pkey->ameth->pkey_ctrl(pkey, ASN1_PKEY_CTRL_CMS_ENVELOPE, cmd, ri); | |
121 | if (i == -2) { | |
122 | CMSerr(CMS_F_CMS_ENV_ASN1_CTRL, | |
123 | CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE); | |
124 | return 0; | |
125 | } | |
126 | if (i <= 0) { | |
127 | CMSerr(CMS_F_CMS_ENV_ASN1_CTRL, CMS_R_CTRL_FAILURE); | |
128 | return 0; | |
129 | } | |
130 | return 1; | |
131 | } | |
e365352d | 132 | |
4f1aa191 | 133 | STACK_OF(CMS_RecipientInfo) *CMS_get0_RecipientInfos(CMS_ContentInfo *cms) |
0f113f3e MC |
134 | { |
135 | CMS_EnvelopedData *env; | |
136 | env = cms_get0_enveloped(cms); | |
137 | if (!env) | |
138 | return NULL; | |
139 | return env->recipientInfos; | |
140 | } | |
4f1aa191 DSH |
141 | |
142 | int CMS_RecipientInfo_type(CMS_RecipientInfo *ri) | |
0f113f3e MC |
143 | { |
144 | return ri->type; | |
145 | } | |
4f1aa191 | 146 | |
e365352d | 147 | EVP_PKEY_CTX *CMS_RecipientInfo_get0_pkey_ctx(CMS_RecipientInfo *ri) |
0f113f3e MC |
148 | { |
149 | if (ri->type == CMS_RECIPINFO_TRANS) | |
150 | return ri->d.ktri->pctx; | |
151 | else if (ri->type == CMS_RECIPINFO_AGREE) | |
152 | return ri->d.kari->pctx; | |
153 | return NULL; | |
154 | } | |
e365352d | 155 | |
761ffa72 | 156 | CMS_ContentInfo *CMS_EnvelopedData_create(const EVP_CIPHER *cipher) |
0f113f3e MC |
157 | { |
158 | CMS_ContentInfo *cms; | |
159 | CMS_EnvelopedData *env; | |
160 | cms = CMS_ContentInfo_new(); | |
161 | if (!cms) | |
162 | goto merr; | |
163 | env = cms_enveloped_data_init(cms); | |
164 | if (!env) | |
165 | goto merr; | |
166 | if (!cms_EncryptedContent_init(env->encryptedContentInfo, | |
167 | cipher, NULL, 0)) | |
168 | goto merr; | |
169 | return cms; | |
170 | merr: | |
171 | if (cms) | |
172 | CMS_ContentInfo_free(cms); | |
173 | CMSerr(CMS_F_CMS_ENVELOPEDDATA_CREATE, ERR_R_MALLOC_FAILURE); | |
174 | return NULL; | |
175 | } | |
761ffa72 | 176 | |
ab124380 DSH |
177 | /* Key Transport Recipient Info (KTRI) routines */ |
178 | ||
17c2764d | 179 | /* Initialise a ktri based on passed certificate and key */ |
ab124380 | 180 | |
17c2764d | 181 | static int cms_RecipientInfo_ktri_init(CMS_RecipientInfo *ri, X509 *recip, |
0f113f3e MC |
182 | EVP_PKEY *pk, unsigned int flags) |
183 | { | |
184 | CMS_KeyTransRecipientInfo *ktri; | |
185 | int idtype; | |
186 | ||
187 | ri->d.ktri = M_ASN1_new_of(CMS_KeyTransRecipientInfo); | |
188 | if (!ri->d.ktri) | |
189 | return 0; | |
190 | ri->type = CMS_RECIPINFO_TRANS; | |
191 | ||
192 | ktri = ri->d.ktri; | |
193 | ||
194 | if (flags & CMS_USE_KEYID) { | |
195 | ktri->version = 2; | |
196 | idtype = CMS_RECIPINFO_KEYIDENTIFIER; | |
197 | } else { | |
198 | ktri->version = 0; | |
199 | idtype = CMS_RECIPINFO_ISSUER_SERIAL; | |
200 | } | |
201 | ||
202 | /* | |
203 | * Not a typo: RecipientIdentifier and SignerIdentifier are the same | |
204 | * structure. | |
205 | */ | |
206 | ||
207 | if (!cms_set1_SignerIdentifier(ktri->rid, recip, idtype)) | |
208 | return 0; | |
209 | ||
210 | CRYPTO_add(&recip->references, 1, CRYPTO_LOCK_X509); | |
211 | CRYPTO_add(&pk->references, 1, CRYPTO_LOCK_EVP_PKEY); | |
212 | ktri->pkey = pk; | |
213 | ktri->recip = recip; | |
214 | ||
215 | if (flags & CMS_KEY_PARAM) { | |
216 | ktri->pctx = EVP_PKEY_CTX_new(ktri->pkey, NULL); | |
217 | if (!ktri->pctx) | |
218 | return 0; | |
219 | if (EVP_PKEY_encrypt_init(ktri->pctx) <= 0) | |
220 | return 0; | |
221 | } else if (!cms_env_asn1_ctrl(ri, 0)) | |
222 | return 0; | |
223 | return 1; | |
224 | } | |
225 | ||
226 | /* | |
227 | * Add a recipient certificate using appropriate type of RecipientInfo | |
17c2764d DSH |
228 | */ |
229 | ||
230 | CMS_RecipientInfo *CMS_add1_recipient_cert(CMS_ContentInfo *cms, | |
0f113f3e MC |
231 | X509 *recip, unsigned int flags) |
232 | { | |
233 | CMS_RecipientInfo *ri = NULL; | |
234 | CMS_EnvelopedData *env; | |
235 | EVP_PKEY *pk = NULL; | |
236 | env = cms_get0_enveloped(cms); | |
237 | if (!env) | |
238 | goto err; | |
239 | ||
240 | /* Initialize recipient info */ | |
241 | ri = M_ASN1_new_of(CMS_RecipientInfo); | |
242 | if (!ri) | |
243 | goto merr; | |
244 | ||
245 | pk = X509_get_pubkey(recip); | |
246 | if (!pk) { | |
247 | CMSerr(CMS_F_CMS_ADD1_RECIPIENT_CERT, CMS_R_ERROR_GETTING_PUBLIC_KEY); | |
248 | goto err; | |
249 | } | |
250 | ||
251 | switch (cms_pkey_get_ri_type(pk)) { | |
252 | ||
253 | case CMS_RECIPINFO_TRANS: | |
254 | if (!cms_RecipientInfo_ktri_init(ri, recip, pk, flags)) | |
255 | goto err; | |
256 | break; | |
257 | ||
258 | case CMS_RECIPINFO_AGREE: | |
259 | if (!cms_RecipientInfo_kari_init(ri, recip, pk, flags)) | |
260 | goto err; | |
261 | break; | |
262 | ||
263 | default: | |
264 | CMSerr(CMS_F_CMS_ADD1_RECIPIENT_CERT, | |
265 | CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE); | |
266 | goto err; | |
267 | ||
268 | } | |
269 | ||
270 | if (!sk_CMS_RecipientInfo_push(env->recipientInfos, ri)) | |
271 | goto merr; | |
272 | ||
273 | EVP_PKEY_free(pk); | |
274 | ||
275 | return ri; | |
276 | ||
277 | merr: | |
278 | CMSerr(CMS_F_CMS_ADD1_RECIPIENT_CERT, ERR_R_MALLOC_FAILURE); | |
279 | err: | |
2ace7450 | 280 | M_ASN1_free_of(ri, CMS_RecipientInfo); |
c5ba2d99 | 281 | EVP_PKEY_free(pk); |
0f113f3e MC |
282 | return NULL; |
283 | ||
284 | } | |
8931b30d DSH |
285 | |
286 | int CMS_RecipientInfo_ktri_get0_algs(CMS_RecipientInfo *ri, | |
0f113f3e MC |
287 | EVP_PKEY **pk, X509 **recip, |
288 | X509_ALGOR **palg) | |
289 | { | |
290 | CMS_KeyTransRecipientInfo *ktri; | |
291 | if (ri->type != CMS_RECIPINFO_TRANS) { | |
292 | CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_GET0_ALGS, | |
293 | CMS_R_NOT_KEY_TRANSPORT); | |
294 | return 0; | |
295 | } | |
296 | ||
297 | ktri = ri->d.ktri; | |
298 | ||
299 | if (pk) | |
300 | *pk = ktri->pkey; | |
301 | if (recip) | |
302 | *recip = ktri->recip; | |
303 | if (palg) | |
304 | *palg = ktri->keyEncryptionAlgorithm; | |
305 | return 1; | |
306 | } | |
8931b30d DSH |
307 | |
308 | int CMS_RecipientInfo_ktri_get0_signer_id(CMS_RecipientInfo *ri, | |
0f113f3e MC |
309 | ASN1_OCTET_STRING **keyid, |
310 | X509_NAME **issuer, | |
311 | ASN1_INTEGER **sno) | |
312 | { | |
313 | CMS_KeyTransRecipientInfo *ktri; | |
314 | if (ri->type != CMS_RECIPINFO_TRANS) { | |
315 | CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_GET0_SIGNER_ID, | |
316 | CMS_R_NOT_KEY_TRANSPORT); | |
317 | return 0; | |
318 | } | |
319 | ktri = ri->d.ktri; | |
320 | ||
321 | return cms_SignerIdentifier_get0_signer_id(ktri->rid, keyid, issuer, sno); | |
322 | } | |
8931b30d DSH |
323 | |
324 | int CMS_RecipientInfo_ktri_cert_cmp(CMS_RecipientInfo *ri, X509 *cert) | |
0f113f3e MC |
325 | { |
326 | if (ri->type != CMS_RECIPINFO_TRANS) { | |
327 | CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_CERT_CMP, | |
328 | CMS_R_NOT_KEY_TRANSPORT); | |
329 | return -2; | |
330 | } | |
331 | return cms_SignerIdentifier_cert_cmp(ri->d.ktri->rid, cert); | |
332 | } | |
4f1aa191 | 333 | |
6e3bc4f0 | 334 | int CMS_RecipientInfo_set0_pkey(CMS_RecipientInfo *ri, EVP_PKEY *pkey) |
0f113f3e MC |
335 | { |
336 | if (ri->type != CMS_RECIPINFO_TRANS) { | |
337 | CMSerr(CMS_F_CMS_RECIPIENTINFO_SET0_PKEY, CMS_R_NOT_KEY_TRANSPORT); | |
338 | return 0; | |
339 | } | |
340 | ri->d.ktri->pkey = pkey; | |
341 | return 1; | |
342 | } | |
6e3bc4f0 | 343 | |
761ffa72 DSH |
344 | /* Encrypt content key in key transport recipient info */ |
345 | ||
346 | static int cms_RecipientInfo_ktri_encrypt(CMS_ContentInfo *cms, | |
0f113f3e MC |
347 | CMS_RecipientInfo *ri) |
348 | { | |
349 | CMS_KeyTransRecipientInfo *ktri; | |
350 | CMS_EncryptedContentInfo *ec; | |
351 | EVP_PKEY_CTX *pctx; | |
352 | unsigned char *ek = NULL; | |
353 | size_t eklen; | |
354 | ||
355 | int ret = 0; | |
356 | ||
357 | if (ri->type != CMS_RECIPINFO_TRANS) { | |
358 | CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_ENCRYPT, CMS_R_NOT_KEY_TRANSPORT); | |
359 | return 0; | |
360 | } | |
361 | ktri = ri->d.ktri; | |
362 | ec = cms->d.envelopedData->encryptedContentInfo; | |
363 | ||
364 | pctx = ktri->pctx; | |
365 | ||
366 | if (pctx) { | |
367 | if (!cms_env_asn1_ctrl(ri, 0)) | |
368 | goto err; | |
369 | } else { | |
370 | pctx = EVP_PKEY_CTX_new(ktri->pkey, NULL); | |
371 | if (!pctx) | |
372 | return 0; | |
373 | ||
374 | if (EVP_PKEY_encrypt_init(pctx) <= 0) | |
375 | goto err; | |
376 | } | |
377 | ||
378 | if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_ENCRYPT, | |
379 | EVP_PKEY_CTRL_CMS_ENCRYPT, 0, ri) <= 0) { | |
380 | CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_ENCRYPT, CMS_R_CTRL_ERROR); | |
381 | goto err; | |
382 | } | |
383 | ||
384 | if (EVP_PKEY_encrypt(pctx, NULL, &eklen, ec->key, ec->keylen) <= 0) | |
385 | goto err; | |
386 | ||
387 | ek = OPENSSL_malloc(eklen); | |
388 | ||
389 | if (ek == NULL) { | |
390 | CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_ENCRYPT, ERR_R_MALLOC_FAILURE); | |
391 | goto err; | |
392 | } | |
393 | ||
394 | if (EVP_PKEY_encrypt(pctx, ek, &eklen, ec->key, ec->keylen) <= 0) | |
395 | goto err; | |
396 | ||
397 | ASN1_STRING_set0(ktri->encryptedKey, ek, eklen); | |
398 | ek = NULL; | |
399 | ||
400 | ret = 1; | |
401 | ||
402 | err: | |
403 | if (pctx) { | |
404 | EVP_PKEY_CTX_free(pctx); | |
405 | ktri->pctx = NULL; | |
406 | } | |
b548a1f1 | 407 | OPENSSL_free(ek); |
0f113f3e MC |
408 | return ret; |
409 | ||
410 | } | |
761ffa72 | 411 | |
ab124380 DSH |
412 | /* Decrypt content key from KTRI */ |
413 | ||
6e3bc4f0 | 414 | static int cms_RecipientInfo_ktri_decrypt(CMS_ContentInfo *cms, |
0f113f3e MC |
415 | CMS_RecipientInfo *ri) |
416 | { | |
417 | CMS_KeyTransRecipientInfo *ktri = ri->d.ktri; | |
418 | EVP_PKEY *pkey = ktri->pkey; | |
419 | unsigned char *ek = NULL; | |
420 | size_t eklen; | |
421 | int ret = 0; | |
422 | CMS_EncryptedContentInfo *ec; | |
423 | ec = cms->d.envelopedData->encryptedContentInfo; | |
424 | ||
425 | if (ktri->pkey == NULL) { | |
426 | CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_DECRYPT, CMS_R_NO_PRIVATE_KEY); | |
427 | return 0; | |
428 | } | |
429 | ||
430 | ktri->pctx = EVP_PKEY_CTX_new(pkey, NULL); | |
431 | if (!ktri->pctx) | |
432 | return 0; | |
433 | ||
434 | if (EVP_PKEY_decrypt_init(ktri->pctx) <= 0) | |
435 | goto err; | |
436 | ||
437 | if (!cms_env_asn1_ctrl(ri, 1)) | |
438 | goto err; | |
439 | ||
440 | if (EVP_PKEY_CTX_ctrl(ktri->pctx, -1, EVP_PKEY_OP_DECRYPT, | |
441 | EVP_PKEY_CTRL_CMS_DECRYPT, 0, ri) <= 0) { | |
442 | CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_DECRYPT, CMS_R_CTRL_ERROR); | |
443 | goto err; | |
444 | } | |
445 | ||
446 | if (EVP_PKEY_decrypt(ktri->pctx, NULL, &eklen, | |
447 | ktri->encryptedKey->data, | |
448 | ktri->encryptedKey->length) <= 0) | |
449 | goto err; | |
450 | ||
451 | ek = OPENSSL_malloc(eklen); | |
452 | ||
453 | if (ek == NULL) { | |
454 | CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_DECRYPT, ERR_R_MALLOC_FAILURE); | |
455 | goto err; | |
456 | } | |
457 | ||
458 | if (EVP_PKEY_decrypt(ktri->pctx, ek, &eklen, | |
459 | ktri->encryptedKey->data, | |
460 | ktri->encryptedKey->length) <= 0) { | |
461 | CMSerr(CMS_F_CMS_RECIPIENTINFO_KTRI_DECRYPT, CMS_R_CMS_LIB); | |
462 | goto err; | |
463 | } | |
464 | ||
465 | ret = 1; | |
466 | ||
4b45c6e5 | 467 | OPENSSL_clear_free(ec->key, ec->keylen); |
0f113f3e MC |
468 | ec->key = ek; |
469 | ec->keylen = eklen; | |
470 | ||
471 | err: | |
c5ba2d99 RS |
472 | EVP_PKEY_CTX_free(ktri->pctx); |
473 | ktri->pctx = NULL; | |
b548a1f1 | 474 | if (!ret) |
0f113f3e MC |
475 | OPENSSL_free(ek); |
476 | ||
477 | return ret; | |
478 | } | |
4f1aa191 | 479 | |
ab124380 DSH |
480 | /* Key Encrypted Key (KEK) RecipientInfo routines */ |
481 | ||
0f113f3e MC |
482 | int CMS_RecipientInfo_kekri_id_cmp(CMS_RecipientInfo *ri, |
483 | const unsigned char *id, size_t idlen) | |
484 | { | |
485 | ASN1_OCTET_STRING tmp_os; | |
486 | CMS_KEKRecipientInfo *kekri; | |
487 | if (ri->type != CMS_RECIPINFO_KEK) { | |
488 | CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_ID_CMP, CMS_R_NOT_KEK); | |
489 | return -2; | |
490 | } | |
491 | kekri = ri->d.kekri; | |
492 | tmp_os.type = V_ASN1_OCTET_STRING; | |
493 | tmp_os.flags = 0; | |
494 | tmp_os.data = (unsigned char *)id; | |
495 | tmp_os.length = (int)idlen; | |
496 | return ASN1_OCTET_STRING_cmp(&tmp_os, kekri->kekid->keyIdentifier); | |
497 | } | |
eeb9cdfc | 498 | |
ab124380 DSH |
499 | /* For now hard code AES key wrap info */ |
500 | ||
501 | static size_t aes_wrap_keylen(int nid) | |
0f113f3e MC |
502 | { |
503 | switch (nid) { | |
504 | case NID_id_aes128_wrap: | |
505 | return 16; | |
ab124380 | 506 | |
0f113f3e MC |
507 | case NID_id_aes192_wrap: |
508 | return 24; | |
ab124380 | 509 | |
0f113f3e MC |
510 | case NID_id_aes256_wrap: |
511 | return 32; | |
ab124380 | 512 | |
0f113f3e MC |
513 | default: |
514 | return 0; | |
515 | } | |
516 | } | |
ab124380 DSH |
517 | |
518 | CMS_RecipientInfo *CMS_add0_recipient_key(CMS_ContentInfo *cms, int nid, | |
0f113f3e MC |
519 | unsigned char *key, size_t keylen, |
520 | unsigned char *id, size_t idlen, | |
521 | ASN1_GENERALIZEDTIME *date, | |
522 | ASN1_OBJECT *otherTypeId, | |
523 | ASN1_TYPE *otherType) | |
524 | { | |
525 | CMS_RecipientInfo *ri = NULL; | |
526 | CMS_EnvelopedData *env; | |
527 | CMS_KEKRecipientInfo *kekri; | |
528 | env = cms_get0_enveloped(cms); | |
529 | if (!env) | |
530 | goto err; | |
ab124380 | 531 | |
0f113f3e MC |
532 | if (nid == NID_undef) { |
533 | switch (keylen) { | |
534 | case 16: | |
535 | nid = NID_id_aes128_wrap; | |
536 | break; | |
ab124380 | 537 | |
0f113f3e MC |
538 | case 24: |
539 | nid = NID_id_aes192_wrap; | |
540 | break; | |
541 | ||
542 | case 32: | |
543 | nid = NID_id_aes256_wrap; | |
544 | break; | |
545 | ||
546 | default: | |
547 | CMSerr(CMS_F_CMS_ADD0_RECIPIENT_KEY, CMS_R_INVALID_KEY_LENGTH); | |
548 | goto err; | |
549 | } | |
550 | ||
551 | } else { | |
552 | ||
553 | size_t exp_keylen = aes_wrap_keylen(nid); | |
554 | ||
555 | if (!exp_keylen) { | |
556 | CMSerr(CMS_F_CMS_ADD0_RECIPIENT_KEY, | |
557 | CMS_R_UNSUPPORTED_KEK_ALGORITHM); | |
558 | goto err; | |
559 | } | |
560 | ||
561 | if (keylen != exp_keylen) { | |
562 | CMSerr(CMS_F_CMS_ADD0_RECIPIENT_KEY, CMS_R_INVALID_KEY_LENGTH); | |
563 | goto err; | |
564 | } | |
565 | ||
566 | } | |
567 | ||
568 | /* Initialize recipient info */ | |
569 | ri = M_ASN1_new_of(CMS_RecipientInfo); | |
570 | if (!ri) | |
571 | goto merr; | |
572 | ||
573 | ri->d.kekri = M_ASN1_new_of(CMS_KEKRecipientInfo); | |
574 | if (!ri->d.kekri) | |
575 | goto merr; | |
576 | ri->type = CMS_RECIPINFO_KEK; | |
577 | ||
578 | kekri = ri->d.kekri; | |
579 | ||
580 | if (otherTypeId) { | |
581 | kekri->kekid->other = M_ASN1_new_of(CMS_OtherKeyAttribute); | |
582 | if (kekri->kekid->other == NULL) | |
583 | goto merr; | |
584 | } | |
ab124380 | 585 | |
0f113f3e MC |
586 | if (!sk_CMS_RecipientInfo_push(env->recipientInfos, ri)) |
587 | goto merr; | |
588 | ||
589 | /* After this point no calls can fail */ | |
590 | ||
591 | kekri->version = 4; | |
592 | ||
593 | kekri->key = key; | |
594 | kekri->keylen = keylen; | |
595 | ||
596 | ASN1_STRING_set0(kekri->kekid->keyIdentifier, id, idlen); | |
597 | ||
598 | kekri->kekid->date = date; | |
599 | ||
600 | if (kekri->kekid->other) { | |
601 | kekri->kekid->other->keyAttrId = otherTypeId; | |
602 | kekri->kekid->other->keyAttr = otherType; | |
603 | } | |
604 | ||
605 | X509_ALGOR_set0(kekri->keyEncryptionAlgorithm, | |
606 | OBJ_nid2obj(nid), V_ASN1_UNDEF, NULL); | |
607 | ||
608 | return ri; | |
609 | ||
610 | merr: | |
611 | CMSerr(CMS_F_CMS_ADD0_RECIPIENT_KEY, ERR_R_MALLOC_FAILURE); | |
612 | err: | |
2ace7450 | 613 | M_ASN1_free_of(ri, CMS_RecipientInfo); |
0f113f3e MC |
614 | return NULL; |
615 | ||
616 | } | |
617 | ||
618 | int CMS_RecipientInfo_kekri_get0_id(CMS_RecipientInfo *ri, | |
619 | X509_ALGOR **palg, | |
620 | ASN1_OCTET_STRING **pid, | |
621 | ASN1_GENERALIZEDTIME **pdate, | |
622 | ASN1_OBJECT **potherid, | |
623 | ASN1_TYPE **pothertype) | |
624 | { | |
625 | CMS_KEKIdentifier *rkid; | |
626 | if (ri->type != CMS_RECIPINFO_KEK) { | |
627 | CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_GET0_ID, CMS_R_NOT_KEK); | |
628 | return 0; | |
629 | } | |
630 | rkid = ri->d.kekri->kekid; | |
631 | if (palg) | |
632 | *palg = ri->d.kekri->keyEncryptionAlgorithm; | |
633 | if (pid) | |
634 | *pid = rkid->keyIdentifier; | |
635 | if (pdate) | |
636 | *pdate = rkid->date; | |
637 | if (potherid) { | |
638 | if (rkid->other) | |
639 | *potherid = rkid->other->keyAttrId; | |
640 | else | |
641 | *potherid = NULL; | |
642 | } | |
643 | if (pothertype) { | |
644 | if (rkid->other) | |
645 | *pothertype = rkid->other->keyAttr; | |
646 | else | |
647 | *pothertype = NULL; | |
648 | } | |
649 | return 1; | |
650 | } | |
651 | ||
652 | int CMS_RecipientInfo_set0_key(CMS_RecipientInfo *ri, | |
653 | unsigned char *key, size_t keylen) | |
654 | { | |
655 | CMS_KEKRecipientInfo *kekri; | |
656 | if (ri->type != CMS_RECIPINFO_KEK) { | |
657 | CMSerr(CMS_F_CMS_RECIPIENTINFO_SET0_KEY, CMS_R_NOT_KEK); | |
658 | return 0; | |
659 | } | |
660 | ||
661 | kekri = ri->d.kekri; | |
662 | kekri->key = key; | |
663 | kekri->keylen = keylen; | |
664 | return 1; | |
665 | } | |
6e3bc4f0 DSH |
666 | |
667 | /* Encrypt content key in KEK recipient info */ | |
668 | ||
669 | static int cms_RecipientInfo_kekri_encrypt(CMS_ContentInfo *cms, | |
0f113f3e MC |
670 | CMS_RecipientInfo *ri) |
671 | { | |
672 | CMS_EncryptedContentInfo *ec; | |
673 | CMS_KEKRecipientInfo *kekri; | |
674 | AES_KEY actx; | |
675 | unsigned char *wkey = NULL; | |
676 | int wkeylen; | |
677 | int r = 0; | |
6e3bc4f0 | 678 | |
0f113f3e | 679 | ec = cms->d.envelopedData->encryptedContentInfo; |
6e3bc4f0 | 680 | |
0f113f3e | 681 | kekri = ri->d.kekri; |
6e3bc4f0 | 682 | |
0f113f3e MC |
683 | if (!kekri->key) { |
684 | CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_ENCRYPT, CMS_R_NO_KEY); | |
685 | return 0; | |
686 | } | |
6e3bc4f0 | 687 | |
0f113f3e MC |
688 | if (AES_set_encrypt_key(kekri->key, kekri->keylen << 3, &actx)) { |
689 | CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_ENCRYPT, | |
690 | CMS_R_ERROR_SETTING_KEY); | |
691 | goto err; | |
692 | } | |
6e3bc4f0 | 693 | |
0f113f3e | 694 | wkey = OPENSSL_malloc(ec->keylen + 8); |
6e3bc4f0 | 695 | |
0f113f3e MC |
696 | if (!wkey) { |
697 | CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_ENCRYPT, ERR_R_MALLOC_FAILURE); | |
698 | goto err; | |
699 | } | |
6e3bc4f0 | 700 | |
0f113f3e | 701 | wkeylen = AES_wrap_key(&actx, NULL, wkey, ec->key, ec->keylen); |
6e3bc4f0 | 702 | |
0f113f3e MC |
703 | if (wkeylen <= 0) { |
704 | CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_ENCRYPT, CMS_R_WRAP_ERROR); | |
705 | goto err; | |
706 | } | |
6e3bc4f0 | 707 | |
0f113f3e | 708 | ASN1_STRING_set0(kekri->encryptedKey, wkey, wkeylen); |
6e3bc4f0 | 709 | |
0f113f3e | 710 | r = 1; |
6e3bc4f0 | 711 | |
0f113f3e | 712 | err: |
6e3bc4f0 | 713 | |
b548a1f1 | 714 | if (!r) |
0f113f3e MC |
715 | OPENSSL_free(wkey); |
716 | OPENSSL_cleanse(&actx, sizeof(actx)); | |
6e3bc4f0 | 717 | |
0f113f3e | 718 | return r; |
6e3bc4f0 | 719 | |
0f113f3e | 720 | } |
6e3bc4f0 | 721 | |
ab124380 DSH |
722 | /* Decrypt content key in KEK recipient info */ |
723 | ||
6e3bc4f0 | 724 | static int cms_RecipientInfo_kekri_decrypt(CMS_ContentInfo *cms, |
0f113f3e MC |
725 | CMS_RecipientInfo *ri) |
726 | { | |
727 | CMS_EncryptedContentInfo *ec; | |
728 | CMS_KEKRecipientInfo *kekri; | |
729 | AES_KEY actx; | |
730 | unsigned char *ukey = NULL; | |
731 | int ukeylen; | |
732 | int r = 0, wrap_nid; | |
733 | ||
734 | ec = cms->d.envelopedData->encryptedContentInfo; | |
735 | ||
736 | kekri = ri->d.kekri; | |
737 | ||
738 | if (!kekri->key) { | |
739 | CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_DECRYPT, CMS_R_NO_KEY); | |
740 | return 0; | |
741 | } | |
742 | ||
743 | wrap_nid = OBJ_obj2nid(kekri->keyEncryptionAlgorithm->algorithm); | |
744 | if (aes_wrap_keylen(wrap_nid) != kekri->keylen) { | |
745 | CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_DECRYPT, | |
746 | CMS_R_INVALID_KEY_LENGTH); | |
747 | return 0; | |
748 | } | |
749 | ||
750 | /* If encrypted key length is invalid don't bother */ | |
751 | ||
752 | if (kekri->encryptedKey->length < 16) { | |
753 | CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_DECRYPT, | |
754 | CMS_R_INVALID_ENCRYPTED_KEY_LENGTH); | |
755 | goto err; | |
756 | } | |
757 | ||
758 | if (AES_set_decrypt_key(kekri->key, kekri->keylen << 3, &actx)) { | |
759 | CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_DECRYPT, | |
760 | CMS_R_ERROR_SETTING_KEY); | |
761 | goto err; | |
762 | } | |
763 | ||
764 | ukey = OPENSSL_malloc(kekri->encryptedKey->length - 8); | |
765 | ||
766 | if (!ukey) { | |
767 | CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_DECRYPT, ERR_R_MALLOC_FAILURE); | |
768 | goto err; | |
769 | } | |
770 | ||
771 | ukeylen = AES_unwrap_key(&actx, NULL, ukey, | |
772 | kekri->encryptedKey->data, | |
773 | kekri->encryptedKey->length); | |
774 | ||
775 | if (ukeylen <= 0) { | |
776 | CMSerr(CMS_F_CMS_RECIPIENTINFO_KEKRI_DECRYPT, CMS_R_UNWRAP_ERROR); | |
777 | goto err; | |
778 | } | |
779 | ||
780 | ec->key = ukey; | |
781 | ec->keylen = ukeylen; | |
782 | ||
783 | r = 1; | |
784 | ||
785 | err: | |
786 | ||
b548a1f1 | 787 | if (!r) |
0f113f3e MC |
788 | OPENSSL_free(ukey); |
789 | OPENSSL_cleanse(&actx, sizeof(actx)); | |
790 | ||
791 | return r; | |
792 | ||
793 | } | |
6e3bc4f0 DSH |
794 | |
795 | int CMS_RecipientInfo_decrypt(CMS_ContentInfo *cms, CMS_RecipientInfo *ri) | |
0f113f3e MC |
796 | { |
797 | switch (ri->type) { | |
798 | case CMS_RECIPINFO_TRANS: | |
799 | return cms_RecipientInfo_ktri_decrypt(cms, ri); | |
6e3bc4f0 | 800 | |
0f113f3e MC |
801 | case CMS_RECIPINFO_KEK: |
802 | return cms_RecipientInfo_kekri_decrypt(cms, ri); | |
6e3bc4f0 | 803 | |
0f113f3e MC |
804 | case CMS_RECIPINFO_PASS: |
805 | return cms_RecipientInfo_pwri_crypt(cms, ri, 0); | |
d2a53c22 | 806 | |
0f113f3e MC |
807 | default: |
808 | CMSerr(CMS_F_CMS_RECIPIENTINFO_DECRYPT, | |
809 | CMS_R_UNSUPPORTED_RECPIENTINFO_TYPE); | |
810 | return 0; | |
811 | } | |
812 | } | |
6e3bc4f0 | 813 | |
e1f1d28f | 814 | int CMS_RecipientInfo_encrypt(CMS_ContentInfo *cms, CMS_RecipientInfo *ri) |
0f113f3e MC |
815 | { |
816 | switch (ri->type) { | |
817 | case CMS_RECIPINFO_TRANS: | |
818 | return cms_RecipientInfo_ktri_encrypt(cms, ri); | |
819 | ||
820 | case CMS_RECIPINFO_AGREE: | |
821 | return cms_RecipientInfo_kari_encrypt(cms, ri); | |
822 | ||
823 | case CMS_RECIPINFO_KEK: | |
824 | return cms_RecipientInfo_kekri_encrypt(cms, ri); | |
0f113f3e MC |
825 | |
826 | case CMS_RECIPINFO_PASS: | |
827 | return cms_RecipientInfo_pwri_crypt(cms, ri, 1); | |
0f113f3e MC |
828 | |
829 | default: | |
830 | CMSerr(CMS_F_CMS_RECIPIENTINFO_ENCRYPT, | |
831 | CMS_R_UNSUPPORTED_RECIPIENT_TYPE); | |
832 | return 0; | |
833 | } | |
834 | } | |
e1f1d28f | 835 | |
ff7b6ce9 DSH |
836 | /* Check structures and fixup version numbers (if necessary) */ |
837 | ||
838 | static void cms_env_set_originfo_version(CMS_EnvelopedData *env) | |
0f113f3e MC |
839 | { |
840 | CMS_OriginatorInfo *org = env->originatorInfo; | |
841 | int i; | |
842 | if (org == NULL) | |
843 | return; | |
844 | for (i = 0; i < sk_CMS_CertificateChoices_num(org->certificates); i++) { | |
845 | CMS_CertificateChoices *cch; | |
846 | cch = sk_CMS_CertificateChoices_value(org->certificates, i); | |
847 | if (cch->type == CMS_CERTCHOICE_OTHER) { | |
848 | env->version = 4; | |
849 | return; | |
850 | } else if (cch->type == CMS_CERTCHOICE_V2ACERT) { | |
851 | if (env->version < 3) | |
852 | env->version = 3; | |
853 | } | |
854 | } | |
855 | ||
856 | for (i = 0; i < sk_CMS_RevocationInfoChoice_num(org->crls); i++) { | |
857 | CMS_RevocationInfoChoice *rch; | |
858 | rch = sk_CMS_RevocationInfoChoice_value(org->crls, i); | |
859 | if (rch->type == CMS_REVCHOICE_OTHER) { | |
860 | env->version = 4; | |
861 | return; | |
862 | } | |
863 | } | |
864 | } | |
ff7b6ce9 DSH |
865 | |
866 | static void cms_env_set_version(CMS_EnvelopedData *env) | |
0f113f3e MC |
867 | { |
868 | int i; | |
869 | CMS_RecipientInfo *ri; | |
870 | ||
871 | /* | |
872 | * Can't set version higher than 4 so if 4 or more already nothing to do. | |
873 | */ | |
874 | if (env->version >= 4) | |
875 | return; | |
876 | ||
877 | cms_env_set_originfo_version(env); | |
878 | ||
879 | if (env->version >= 3) | |
880 | return; | |
881 | ||
882 | for (i = 0; i < sk_CMS_RecipientInfo_num(env->recipientInfos); i++) { | |
883 | ri = sk_CMS_RecipientInfo_value(env->recipientInfos, i); | |
884 | if (ri->type == CMS_RECIPINFO_PASS || ri->type == CMS_RECIPINFO_OTHER) { | |
885 | env->version = 3; | |
886 | return; | |
887 | } else if (ri->type != CMS_RECIPINFO_TRANS | |
888 | || ri->d.ktri->version != 0) { | |
889 | env->version = 2; | |
890 | } | |
891 | } | |
892 | if (env->version == 2) | |
893 | return; | |
894 | if (env->originatorInfo || env->unprotectedAttrs) | |
895 | env->version = 2; | |
896 | env->version = 0; | |
897 | } | |
ff7b6ce9 | 898 | |
4f1aa191 | 899 | BIO *cms_EnvelopedData_init_bio(CMS_ContentInfo *cms) |
0f113f3e MC |
900 | { |
901 | CMS_EncryptedContentInfo *ec; | |
902 | STACK_OF(CMS_RecipientInfo) *rinfos; | |
903 | CMS_RecipientInfo *ri; | |
904 | int i, ok = 0; | |
905 | BIO *ret; | |
906 | ||
907 | /* Get BIO first to set up key */ | |
908 | ||
909 | ec = cms->d.envelopedData->encryptedContentInfo; | |
910 | ret = cms_EncryptedContent_init_bio(ec); | |
911 | ||
912 | /* If error or no cipher end of processing */ | |
913 | ||
914 | if (!ret || !ec->cipher) | |
915 | return ret; | |
916 | ||
917 | /* Now encrypt content key according to each RecipientInfo type */ | |
918 | ||
919 | rinfos = cms->d.envelopedData->recipientInfos; | |
920 | ||
921 | for (i = 0; i < sk_CMS_RecipientInfo_num(rinfos); i++) { | |
922 | ri = sk_CMS_RecipientInfo_value(rinfos, i); | |
923 | if (CMS_RecipientInfo_encrypt(cms, ri) <= 0) { | |
924 | CMSerr(CMS_F_CMS_ENVELOPEDDATA_INIT_BIO, | |
925 | CMS_R_ERROR_SETTING_RECIPIENTINFO); | |
926 | goto err; | |
927 | } | |
928 | } | |
929 | cms_env_set_version(cms->d.envelopedData); | |
930 | ||
931 | ok = 1; | |
932 | ||
933 | err: | |
934 | ec->cipher = NULL; | |
4b45c6e5 RS |
935 | OPENSSL_clear_free(ec->key, ec->keylen); |
936 | ec->key = NULL; | |
937 | ec->keylen = 0; | |
0f113f3e MC |
938 | if (ok) |
939 | return ret; | |
940 | BIO_free(ret); | |
941 | return NULL; | |
942 | ||
943 | } | |
944 | ||
945 | /* | |
946 | * Get RecipientInfo type (if any) supported by a key (public or private). To | |
947 | * retain compatibility with previous behaviour if the ctrl value isn't | |
17c2764d DSH |
948 | * supported we assume key transport. |
949 | */ | |
950 | int cms_pkey_get_ri_type(EVP_PKEY *pk) | |
0f113f3e MC |
951 | { |
952 | if (pk->ameth && pk->ameth->pkey_ctrl) { | |
953 | int i, r; | |
954 | i = pk->ameth->pkey_ctrl(pk, ASN1_PKEY_CTRL_CMS_RI_TYPE, 0, &r); | |
955 | if (i > 0) | |
956 | return r; | |
957 | } | |
958 | return CMS_RECIPINFO_TRANS; | |
959 | } |