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authorcvs2svn <admin@example.com>2014-02-27 21:04:58 +0000
committercvs2svn <admin@example.com>2014-02-27 21:04:58 +0000
commit726818f36b5221c023cd04c4b90bdbc08e94cd96 (patch)
treecf8221f3aa5bf5a578ddf1ecf5677ad08c04d342 /src/lib/libcrypto/cms/cms_pwri.c
parent3b6d92e82b1421b811bcdec7f7fdfb31eeef18de (diff)
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Diffstat (limited to 'src/lib/libcrypto/cms/cms_pwri.c')
-rw-r--r--src/lib/libcrypto/cms/cms_pwri.c454
1 files changed, 0 insertions, 454 deletions
diff --git a/src/lib/libcrypto/cms/cms_pwri.c b/src/lib/libcrypto/cms/cms_pwri.c
deleted file mode 100644
index b79612a12d..0000000000
--- a/src/lib/libcrypto/cms/cms_pwri.c
+++ /dev/null
@@ -1,454 +0,0 @@
1/* crypto/cms/cms_pwri.c */
2/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3 * project.
4 */
5/* ====================================================================
6 * Copyright (c) 2009 The OpenSSL Project. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
18 * distribution.
19 *
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24 *
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
29 *
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
33 *
34 * 6. Redistributions of any form whatsoever must retain the following
35 * acknowledgment:
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 *
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
52 */
53
54#include "cryptlib.h"
55#include <openssl/asn1t.h>
56#include <openssl/pem.h>
57#include <openssl/x509v3.h>
58#include <openssl/err.h>
59#include <openssl/cms.h>
60#include <openssl/rand.h>
61#include <openssl/aes.h>
62#include "cms_lcl.h"
63#include "asn1_locl.h"
64
65int CMS_RecipientInfo_set0_password(CMS_RecipientInfo *ri,
66 unsigned char *pass, ossl_ssize_t passlen)
67 {
68 CMS_PasswordRecipientInfo *pwri;
69 if (ri->type != CMS_RECIPINFO_PASS)
70 {
71 CMSerr(CMS_F_CMS_RECIPIENTINFO_SET0_PASSWORD, CMS_R_NOT_PWRI);
72 return 0;
73 }
74
75 pwri = ri->d.pwri;
76 pwri->pass = pass;
77 if (pass && passlen < 0)
78 passlen = strlen((char *)pass);
79 pwri->passlen = passlen;
80 return 1;
81 }
82
83CMS_RecipientInfo *CMS_add0_recipient_password(CMS_ContentInfo *cms,
84 int iter, int wrap_nid, int pbe_nid,
85 unsigned char *pass,
86 ossl_ssize_t passlen,
87 const EVP_CIPHER *kekciph)
88 {
89 CMS_RecipientInfo *ri = NULL;
90 CMS_EnvelopedData *env;
91 CMS_PasswordRecipientInfo *pwri;
92 EVP_CIPHER_CTX ctx;
93 X509_ALGOR *encalg = NULL;
94 unsigned char iv[EVP_MAX_IV_LENGTH];
95 int ivlen;
96 env = cms_get0_enveloped(cms);
97 if (!env)
98 goto err;
99
100 if (wrap_nid <= 0)
101 wrap_nid = NID_id_alg_PWRI_KEK;
102
103 if (pbe_nid <= 0)
104 pbe_nid = NID_id_pbkdf2;
105
106 /* Get from enveloped data */
107 if (kekciph == NULL)
108 kekciph = env->encryptedContentInfo->cipher;
109
110 if (kekciph == NULL)
111 {
112 CMSerr(CMS_F_CMS_ADD0_RECIPIENT_PASSWORD, CMS_R_NO_CIPHER);
113 return NULL;
114 }
115 if (wrap_nid != NID_id_alg_PWRI_KEK)
116 {
117 CMSerr(CMS_F_CMS_ADD0_RECIPIENT_PASSWORD,
118 CMS_R_UNSUPPORTED_KEY_ENCRYPTION_ALGORITHM);
119 return NULL;
120 }
121
122 /* Setup algorithm identifier for cipher */
123 encalg = X509_ALGOR_new();
124 EVP_CIPHER_CTX_init(&ctx);
125
126 if (EVP_EncryptInit_ex(&ctx, kekciph, NULL, NULL, NULL) <= 0)
127 {
128 CMSerr(CMS_F_CMS_ADD0_RECIPIENT_PASSWORD, ERR_R_EVP_LIB);
129 goto err;
130 }
131
132 ivlen = EVP_CIPHER_CTX_iv_length(&ctx);
133
134 if (ivlen > 0)
135 {
136 if (RAND_pseudo_bytes(iv, ivlen) <= 0)
137 goto err;
138 if (EVP_EncryptInit_ex(&ctx, NULL, NULL, NULL, iv) <= 0)
139 {
140 CMSerr(CMS_F_CMS_ADD0_RECIPIENT_PASSWORD,
141 ERR_R_EVP_LIB);
142 goto err;
143 }
144 encalg->parameter = ASN1_TYPE_new();
145 if (!encalg->parameter)
146 {
147 CMSerr(CMS_F_CMS_ADD0_RECIPIENT_PASSWORD,
148 ERR_R_MALLOC_FAILURE);
149 goto err;
150 }
151 if (EVP_CIPHER_param_to_asn1(&ctx, encalg->parameter) <= 0)
152 {
153 CMSerr(CMS_F_CMS_ADD0_RECIPIENT_PASSWORD,
154 CMS_R_CIPHER_PARAMETER_INITIALISATION_ERROR);
155 goto err;
156 }
157 }
158
159
160 encalg->algorithm = OBJ_nid2obj(EVP_CIPHER_CTX_type(&ctx));
161
162 EVP_CIPHER_CTX_cleanup(&ctx);
163
164 /* Initialize recipient info */
165 ri = M_ASN1_new_of(CMS_RecipientInfo);
166 if (!ri)
167 goto merr;
168
169 ri->d.pwri = M_ASN1_new_of(CMS_PasswordRecipientInfo);
170 if (!ri->d.pwri)
171 goto merr;
172 ri->type = CMS_RECIPINFO_PASS;
173
174 pwri = ri->d.pwri;
175 /* Since this is overwritten, free up empty structure already there */
176 X509_ALGOR_free(pwri->keyEncryptionAlgorithm);
177 pwri->keyEncryptionAlgorithm = X509_ALGOR_new();
178 if (!pwri->keyEncryptionAlgorithm)
179 goto merr;
180 pwri->keyEncryptionAlgorithm->algorithm = OBJ_nid2obj(wrap_nid);
181 pwri->keyEncryptionAlgorithm->parameter = ASN1_TYPE_new();
182 if (!pwri->keyEncryptionAlgorithm->parameter)
183 goto merr;
184
185 if(!ASN1_item_pack(encalg, ASN1_ITEM_rptr(X509_ALGOR),
186 &pwri->keyEncryptionAlgorithm->parameter->value.sequence))
187 goto merr;
188 pwri->keyEncryptionAlgorithm->parameter->type = V_ASN1_SEQUENCE;
189
190 X509_ALGOR_free(encalg);
191 encalg = NULL;
192
193 /* Setup PBE algorithm */
194
195 pwri->keyDerivationAlgorithm = PKCS5_pbkdf2_set(iter, NULL, 0, -1, -1);
196
197 if (!pwri->keyDerivationAlgorithm)
198 goto err;
199
200 CMS_RecipientInfo_set0_password(ri, pass, passlen);
201 pwri->version = 0;
202
203 if (!sk_CMS_RecipientInfo_push(env->recipientInfos, ri))
204 goto merr;
205
206 return ri;
207
208 merr:
209 CMSerr(CMS_F_CMS_ADD0_RECIPIENT_PASSWORD, ERR_R_MALLOC_FAILURE);
210 err:
211 EVP_CIPHER_CTX_cleanup(&ctx);
212 if (ri)
213 M_ASN1_free_of(ri, CMS_RecipientInfo);
214 if (encalg)
215 X509_ALGOR_free(encalg);
216 return NULL;
217
218 }
219
220/* This is an implementation of the key wrapping mechanism in RFC3211,
221 * at some point this should go into EVP.
222 */
223
224static int kek_unwrap_key(unsigned char *out, size_t *outlen,
225 const unsigned char *in, size_t inlen, EVP_CIPHER_CTX *ctx)
226 {
227 size_t blocklen = EVP_CIPHER_CTX_block_size(ctx);
228 unsigned char *tmp;
229 int outl, rv = 0;
230 if (inlen < 2 * blocklen)
231 {
232 /* too small */
233 return 0;
234 }
235 if (inlen % blocklen)
236 {
237 /* Invalid size */
238 return 0;
239 }
240 tmp = OPENSSL_malloc(inlen);
241 /* setup IV by decrypting last two blocks */
242 EVP_DecryptUpdate(ctx, tmp + inlen - 2 * blocklen, &outl,
243 in + inlen - 2 * blocklen, blocklen * 2);
244 /* Do a decrypt of last decrypted block to set IV to correct value
245 * output it to start of buffer so we don't corrupt decrypted block
246 * this works because buffer is at least two block lengths long.
247 */
248 EVP_DecryptUpdate(ctx, tmp, &outl,
249 tmp + inlen - blocklen, blocklen);
250 /* Can now decrypt first n - 1 blocks */
251 EVP_DecryptUpdate(ctx, tmp, &outl, in, inlen - blocklen);
252
253 /* Reset IV to original value */
254 EVP_DecryptInit_ex(ctx, NULL, NULL, NULL, NULL);
255 /* Decrypt again */
256 EVP_DecryptUpdate(ctx, tmp, &outl, tmp, inlen);
257 /* Check check bytes */
258 if (((tmp[1] ^ tmp[4]) & (tmp[2] ^ tmp[5]) & (tmp[3] ^ tmp[6])) != 0xff)
259 {
260 /* Check byte failure */
261 goto err;
262 }
263 if (inlen < (size_t)(tmp[0] - 4 ))
264 {
265 /* Invalid length value */
266 goto err;
267 }
268 *outlen = (size_t)tmp[0];
269 memcpy(out, tmp + 4, *outlen);
270 rv = 1;
271 err:
272 OPENSSL_cleanse(tmp, inlen);
273 OPENSSL_free(tmp);
274 return rv;
275
276 }
277
278static int kek_wrap_key(unsigned char *out, size_t *outlen,
279 const unsigned char *in, size_t inlen, EVP_CIPHER_CTX *ctx)
280 {
281 size_t blocklen = EVP_CIPHER_CTX_block_size(ctx);
282 size_t olen;
283 int dummy;
284 /* First decide length of output buffer: need header and round up to
285 * multiple of block length.
286 */
287 olen = (inlen + 4 + blocklen - 1)/blocklen;
288 olen *= blocklen;
289 if (olen < 2 * blocklen)
290 {
291 /* Key too small */
292 return 0;
293 }
294 if (inlen > 0xFF)
295 {
296 /* Key too large */
297 return 0;
298 }
299 if (out)
300 {
301 /* Set header */
302 out[0] = (unsigned char)inlen;
303 out[1] = in[0] ^ 0xFF;
304 out[2] = in[1] ^ 0xFF;
305 out[3] = in[2] ^ 0xFF;
306 memcpy(out + 4, in, inlen);
307 /* Add random padding to end */
308 if (olen > inlen + 4)
309 RAND_pseudo_bytes(out + 4 + inlen, olen - 4 - inlen);
310 /* Encrypt twice */
311 EVP_EncryptUpdate(ctx, out, &dummy, out, olen);
312 EVP_EncryptUpdate(ctx, out, &dummy, out, olen);
313 }
314
315 *outlen = olen;
316
317 return 1;
318 }
319
320/* Encrypt/Decrypt content key in PWRI recipient info */
321
322int cms_RecipientInfo_pwri_crypt(CMS_ContentInfo *cms, CMS_RecipientInfo *ri,
323 int en_de)
324 {
325 CMS_EncryptedContentInfo *ec;
326 CMS_PasswordRecipientInfo *pwri;
327 const unsigned char *p = NULL;
328 int plen;
329 int r = 0;
330 X509_ALGOR *algtmp, *kekalg = NULL;
331 EVP_CIPHER_CTX kekctx;
332 const EVP_CIPHER *kekcipher;
333 unsigned char *key = NULL;
334 size_t keylen;
335
336 ec = cms->d.envelopedData->encryptedContentInfo;
337
338 pwri = ri->d.pwri;
339 EVP_CIPHER_CTX_init(&kekctx);
340
341 if (!pwri->pass)
342 {
343 CMSerr(CMS_F_CMS_RECIPIENTINFO_PWRI_CRYPT, CMS_R_NO_PASSWORD);
344 return 0;
345 }
346 algtmp = pwri->keyEncryptionAlgorithm;
347
348 if (!algtmp || OBJ_obj2nid(algtmp->algorithm) != NID_id_alg_PWRI_KEK)
349 {
350 CMSerr(CMS_F_CMS_RECIPIENTINFO_PWRI_CRYPT,
351 CMS_R_UNSUPPORTED_KEY_ENCRYPTION_ALGORITHM);
352 return 0;
353 }
354
355 if (algtmp->parameter->type == V_ASN1_SEQUENCE)
356 {
357 p = algtmp->parameter->value.sequence->data;
358 plen = algtmp->parameter->value.sequence->length;
359 kekalg = d2i_X509_ALGOR(NULL, &p, plen);
360 }
361 if (kekalg == NULL)
362 {
363 CMSerr(CMS_F_CMS_RECIPIENTINFO_PWRI_CRYPT,
364 CMS_R_INVALID_KEY_ENCRYPTION_PARAMETER);
365 return 0;
366 }
367
368 kekcipher = EVP_get_cipherbyobj(kekalg->algorithm);
369
370 if(!kekcipher)
371 {
372 CMSerr(CMS_F_CMS_RECIPIENTINFO_PWRI_CRYPT,
373 CMS_R_UNKNOWN_CIPHER);
374 goto err;
375 }
376
377 /* Fixup cipher based on AlgorithmIdentifier to set IV etc */
378 if (!EVP_CipherInit_ex(&kekctx, kekcipher, NULL, NULL, NULL, en_de))
379 goto err;
380 EVP_CIPHER_CTX_set_padding(&kekctx, 0);
381 if(EVP_CIPHER_asn1_to_param(&kekctx, kekalg->parameter) < 0)
382 {
383 CMSerr(CMS_F_CMS_RECIPIENTINFO_PWRI_CRYPT,
384 CMS_R_CIPHER_PARAMETER_INITIALISATION_ERROR);
385 goto err;
386 }
387
388 algtmp = pwri->keyDerivationAlgorithm;
389
390 /* Finish password based key derivation to setup key in "ctx" */
391
392 if (EVP_PBE_CipherInit(algtmp->algorithm,
393 (char *)pwri->pass, pwri->passlen,
394 algtmp->parameter, &kekctx, en_de) < 0)
395 {
396 CMSerr(CMS_F_CMS_RECIPIENTINFO_PWRI_CRYPT, ERR_R_EVP_LIB);
397 goto err;
398 }
399
400 /* Finally wrap/unwrap the key */
401
402 if (en_de)
403 {
404
405 if (!kek_wrap_key(NULL, &keylen, ec->key, ec->keylen, &kekctx))
406 goto err;
407
408 key = OPENSSL_malloc(keylen);
409
410 if (!key)
411 goto err;
412
413 if (!kek_wrap_key(key, &keylen, ec->key, ec->keylen, &kekctx))
414 goto err;
415 pwri->encryptedKey->data = key;
416 pwri->encryptedKey->length = keylen;
417 }
418 else
419 {
420 key = OPENSSL_malloc(pwri->encryptedKey->length);
421
422 if (!key)
423 {
424 CMSerr(CMS_F_CMS_RECIPIENTINFO_PWRI_CRYPT,
425 ERR_R_MALLOC_FAILURE);
426 goto err;
427 }
428 if (!kek_unwrap_key(key, &keylen,
429 pwri->encryptedKey->data,
430 pwri->encryptedKey->length, &kekctx))
431 {
432 CMSerr(CMS_F_CMS_RECIPIENTINFO_PWRI_CRYPT,
433 CMS_R_UNWRAP_FAILURE);
434 goto err;
435 }
436
437 ec->key = key;
438 ec->keylen = keylen;
439
440 }
441
442 r = 1;
443
444 err:
445
446 EVP_CIPHER_CTX_cleanup(&kekctx);
447
448 if (!r && key)
449 OPENSSL_free(key);
450 X509_ALGOR_free(kekalg);
451
452 return r;
453
454 }
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