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diff --git a/src/lib/libcrypto/evp/p5_crpt2.c b/src/lib/libcrypto/evp/p5_crpt2.c
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1/* p5_crpt2.c */
2/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3 * project 1999.
4 */
5/* ====================================================================
6 * Copyright (c) 1999-2006 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 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
56 *
57 */
58#include <stdio.h>
59#include <stdlib.h>
60#include "cryptlib.h"
61#if !defined(OPENSSL_NO_HMAC) && !defined(OPENSSL_NO_SHA)
62#include <openssl/x509.h>
63#include <openssl/evp.h>
64#include <openssl/hmac.h>
65
66/* set this to print out info about the keygen algorithm */
67/* #define DEBUG_PKCS5V2 */
68
69#ifdef DEBUG_PKCS5V2
70 static void h__dump (const unsigned char *p, int len);
71#endif
72
73/* This is an implementation of PKCS#5 v2.0 password based encryption key
74 * derivation function PBKDF2.
75 * SHA1 version verified against test vectors posted by Peter Gutmann
76 * <pgut001@cs.auckland.ac.nz> to the PKCS-TNG <pkcs-tng@rsa.com> mailing list.
77 */
78
79int PKCS5_PBKDF2_HMAC(const char *pass, int passlen,
80 const unsigned char *salt, int saltlen, int iter,
81 const EVP_MD *digest,
82 int keylen, unsigned char *out)
83 {
84 unsigned char digtmp[EVP_MAX_MD_SIZE], *p, itmp[4];
85 int cplen, j, k, tkeylen, mdlen;
86 unsigned long i = 1;
87 HMAC_CTX hctx;
88
89 mdlen = EVP_MD_size(digest);
90 if (mdlen < 0)
91 return 0;
92
93 HMAC_CTX_init(&hctx);
94 p = out;
95 tkeylen = keylen;
96 if(!pass)
97 passlen = 0;
98 else if(passlen == -1)
99 passlen = strlen(pass);
100 while(tkeylen)
101 {
102 if(tkeylen > mdlen)
103 cplen = mdlen;
104 else
105 cplen = tkeylen;
106 /* We are unlikely to ever use more than 256 blocks (5120 bits!)
107 * but just in case...
108 */
109 itmp[0] = (unsigned char)((i >> 24) & 0xff);
110 itmp[1] = (unsigned char)((i >> 16) & 0xff);
111 itmp[2] = (unsigned char)((i >> 8) & 0xff);
112 itmp[3] = (unsigned char)(i & 0xff);
113 HMAC_Init_ex(&hctx, pass, passlen, digest, NULL);
114 HMAC_Update(&hctx, salt, saltlen);
115 HMAC_Update(&hctx, itmp, 4);
116 HMAC_Final(&hctx, digtmp, NULL);
117 memcpy(p, digtmp, cplen);
118 for(j = 1; j < iter; j++)
119 {
120 HMAC(digest, pass, passlen,
121 digtmp, mdlen, digtmp, NULL);
122 for(k = 0; k < cplen; k++)
123 p[k] ^= digtmp[k];
124 }
125 tkeylen-= cplen;
126 i++;
127 p+= cplen;
128 }
129 HMAC_CTX_cleanup(&hctx);
130#ifdef DEBUG_PKCS5V2
131 fprintf(stderr, "Password:\n");
132 h__dump (pass, passlen);
133 fprintf(stderr, "Salt:\n");
134 h__dump (salt, saltlen);
135 fprintf(stderr, "Iteration count %d\n", iter);
136 fprintf(stderr, "Key:\n");
137 h__dump (out, keylen);
138#endif
139 return 1;
140 }
141
142int PKCS5_PBKDF2_HMAC_SHA1(const char *pass, int passlen,
143 const unsigned char *salt, int saltlen, int iter,
144 int keylen, unsigned char *out)
145 {
146 return PKCS5_PBKDF2_HMAC(pass, passlen, salt, saltlen, iter, EVP_sha1(),
147 keylen, out);
148 }
149
150#ifdef DO_TEST
151main()
152{
153 unsigned char out[4];
154 unsigned char salt[] = {0x12, 0x34, 0x56, 0x78};
155 PKCS5_PBKDF2_HMAC_SHA1("password", -1, salt, 4, 5, 4, out);
156 fprintf(stderr, "Out %02X %02X %02X %02X\n",
157 out[0], out[1], out[2], out[3]);
158}
159
160#endif
161
162/* Now the key derivation function itself. This is a bit evil because
163 * it has to check the ASN1 parameters are valid: and there are quite a
164 * few of them...
165 */
166
167int PKCS5_v2_PBE_keyivgen(EVP_CIPHER_CTX *ctx, const char *pass, int passlen,
168 ASN1_TYPE *param, const EVP_CIPHER *c, const EVP_MD *md,
169 int en_de)
170{
171 unsigned char *salt, key[EVP_MAX_KEY_LENGTH];
172 const unsigned char *pbuf;
173 int saltlen, iter, plen;
174 unsigned int keylen;
175 PBE2PARAM *pbe2 = NULL;
176 const EVP_CIPHER *cipher;
177 PBKDF2PARAM *kdf = NULL;
178 const EVP_MD *prfmd;
179 int prf_nid, hmac_md_nid;
180
181 if (param == NULL || param->type != V_ASN1_SEQUENCE ||
182 param->value.sequence == NULL) {
183 EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN,EVP_R_DECODE_ERROR);
184 return 0;
185 }
186
187 pbuf = param->value.sequence->data;
188 plen = param->value.sequence->length;
189 if(!(pbe2 = d2i_PBE2PARAM(NULL, &pbuf, plen))) {
190 EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN,EVP_R_DECODE_ERROR);
191 return 0;
192 }
193
194 /* See if we recognise the key derivation function */
195
196 if(OBJ_obj2nid(pbe2->keyfunc->algorithm) != NID_id_pbkdf2) {
197 EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN,
198 EVP_R_UNSUPPORTED_KEY_DERIVATION_FUNCTION);
199 goto err;
200 }
201
202 /* lets see if we recognise the encryption algorithm.
203 */
204
205 cipher = EVP_get_cipherbyobj(pbe2->encryption->algorithm);
206
207 if(!cipher) {
208 EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN,
209 EVP_R_UNSUPPORTED_CIPHER);
210 goto err;
211 }
212
213 /* Fixup cipher based on AlgorithmIdentifier */
214 EVP_CipherInit_ex(ctx, cipher, NULL, NULL, NULL, en_de);
215 if(EVP_CIPHER_asn1_to_param(ctx, pbe2->encryption->parameter) < 0) {
216 EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN,
217 EVP_R_CIPHER_PARAMETER_ERROR);
218 goto err;
219 }
220 keylen = EVP_CIPHER_CTX_key_length(ctx);
221 OPENSSL_assert(keylen <= sizeof key);
222
223 /* Now decode key derivation function */
224
225 if(!pbe2->keyfunc->parameter ||
226 (pbe2->keyfunc->parameter->type != V_ASN1_SEQUENCE))
227 {
228 EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN,EVP_R_DECODE_ERROR);
229 goto err;
230 }
231
232 pbuf = pbe2->keyfunc->parameter->value.sequence->data;
233 plen = pbe2->keyfunc->parameter->value.sequence->length;
234 if(!(kdf = d2i_PBKDF2PARAM(NULL, &pbuf, plen)) ) {
235 EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN,EVP_R_DECODE_ERROR);
236 goto err;
237 }
238
239 PBE2PARAM_free(pbe2);
240 pbe2 = NULL;
241
242 /* Now check the parameters of the kdf */
243
244 if(kdf->keylength && (ASN1_INTEGER_get(kdf->keylength) != (int)keylen)){
245 EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN,
246 EVP_R_UNSUPPORTED_KEYLENGTH);
247 goto err;
248 }
249
250 if (kdf->prf)
251 prf_nid = OBJ_obj2nid(kdf->prf->algorithm);
252 else
253 prf_nid = NID_hmacWithSHA1;
254
255 if (!EVP_PBE_find(EVP_PBE_TYPE_PRF, prf_nid, NULL, &hmac_md_nid, 0))
256 {
257 EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN, EVP_R_UNSUPPORTED_PRF);
258 goto err;
259 }
260
261 prfmd = EVP_get_digestbynid(hmac_md_nid);
262 if (prfmd == NULL)
263 {
264 EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN, EVP_R_UNSUPPORTED_PRF);
265 goto err;
266 }
267
268 if(kdf->salt->type != V_ASN1_OCTET_STRING) {
269 EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN,
270 EVP_R_UNSUPPORTED_SALT_TYPE);
271 goto err;
272 }
273
274 /* it seems that its all OK */
275 salt = kdf->salt->value.octet_string->data;
276 saltlen = kdf->salt->value.octet_string->length;
277 iter = ASN1_INTEGER_get(kdf->iter);
278 if(!PKCS5_PBKDF2_HMAC(pass, passlen, salt, saltlen, iter, prfmd,
279 keylen, key))
280 goto err;
281 EVP_CipherInit_ex(ctx, NULL, NULL, key, NULL, en_de);
282 OPENSSL_cleanse(key, keylen);
283 PBKDF2PARAM_free(kdf);
284 return 1;
285
286 err:
287 PBE2PARAM_free(pbe2);
288 PBKDF2PARAM_free(kdf);
289 return 0;
290}
291
292#ifdef DEBUG_PKCS5V2
293static void h__dump (const unsigned char *p, int len)
294{
295 for (; len --; p++) fprintf(stderr, "%02X ", *p);
296 fprintf(stderr, "\n");
297}
298#endif
299#endif
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