2 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
5 /* ====================================================================
6 * Copyright (c) 1999 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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 * ====================================================================
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).
60 #include "internal/cryptlib.h"
61 #include <openssl/pkcs12.h>
62 #include <openssl/bn.h>
64 /* Uncomment out this line to get debugging info about key generation */
66 * #define OPENSSL_DEBUG_KEYGEN
68 #ifdef OPENSSL_DEBUG_KEYGEN
69 # include <openssl/bio.h>
71 void h__dump(unsigned char *p, int len);
74 /* PKCS12 compatible key/IV generation */
76 # define min(a,b) ((a) < (b) ? (a) : (b))
79 int PKCS12_key_gen_asc(const char *pass, int passlen, unsigned char *salt,
80 int saltlen, int id, int iter, int n,
81 unsigned char *out, const EVP_MD *md_type)
84 unsigned char *unipass;
90 } else if (!OPENSSL_asc2uni(pass, passlen, &unipass, &uniplen)) {
91 PKCS12err(PKCS12_F_PKCS12_KEY_GEN_ASC, ERR_R_MALLOC_FAILURE);
94 ret = PKCS12_key_gen_uni(unipass, uniplen, salt, saltlen,
95 id, iter, n, out, md_type);
98 OPENSSL_clear_free(unipass, uniplen);
102 int PKCS12_key_gen_uni(unsigned char *pass, int passlen, unsigned char *salt,
103 int saltlen, int id, int iter, int n,
104 unsigned char *out, const EVP_MD *md_type)
106 unsigned char *B = NULL, *D = NULL, *I = NULL, *p = NULL, *Ai = NULL;
107 int Slen, Plen, Ilen, Ijlen;
110 BIGNUM *Ij = NULL, *Bpl1 = NULL; /* These hold Ij and B + 1 */
111 EVP_MD_CTX *ctx = NULL;
112 #ifdef OPENSSL_DEBUG_KEYGEN
113 unsigned char *tmpout = out;
117 ctx = EVP_MD_CTX_new();
121 #ifdef OPENSSL_DEBUG_KEYGEN
122 fprintf(stderr, "KEYGEN DEBUG\n");
123 fprintf(stderr, "ID %d, ITER %d\n", id, iter);
124 fprintf(stderr, "Password (length %d):\n", passlen);
125 h__dump(pass, passlen);
126 fprintf(stderr, "Salt (length %d):\n", saltlen);
127 h__dump(salt, saltlen);
129 v = EVP_MD_block_size(md_type);
130 u = EVP_MD_size(md_type);
133 D = OPENSSL_malloc(v);
134 Ai = OPENSSL_malloc(u);
135 B = OPENSSL_malloc(v + 1);
136 Slen = v * ((saltlen + v - 1) / v);
138 Plen = v * ((passlen + v - 1) / v);
142 I = OPENSSL_malloc(Ilen);
145 if (D == NULL || Ai == NULL || B == NULL || I == NULL || Ij == NULL
148 for (i = 0; i < v; i++)
151 for (i = 0; i < Slen; i++)
152 *p++ = salt[i % saltlen];
153 for (i = 0; i < Plen; i++)
154 *p++ = pass[i % passlen];
156 if (!EVP_DigestInit_ex(ctx, md_type, NULL)
157 || !EVP_DigestUpdate(ctx, D, v)
158 || !EVP_DigestUpdate(ctx, I, Ilen)
159 || !EVP_DigestFinal_ex(ctx, Ai, NULL))
161 for (j = 1; j < iter; j++) {
162 if (!EVP_DigestInit_ex(ctx, md_type, NULL)
163 || !EVP_DigestUpdate(ctx, Ai, u)
164 || !EVP_DigestFinal_ex(ctx, Ai, NULL))
167 memcpy(out, Ai, min(n, u));
169 #ifdef OPENSSL_DEBUG_KEYGEN
170 fprintf(stderr, "Output KEY (length %d)\n", tmpn);
171 h__dump(tmpout, tmpn);
178 for (j = 0; j < v; j++)
180 /* Work out B + 1 first then can use B as tmp space */
181 if (!BN_bin2bn(B, v, Bpl1))
183 if (!BN_add_word(Bpl1, 1))
185 for (j = 0; j < Ilen; j += v) {
186 if (!BN_bin2bn(I + j, v, Ij))
188 if (!BN_add(Ij, Ij, Bpl1))
190 if (!BN_bn2bin(Ij, B))
192 Ijlen = BN_num_bytes(Ij);
193 /* If more than 2^(v*8) - 1 cut off MSB */
195 if (!BN_bn2bin(Ij, B))
197 memcpy(I + j, B + 1, v);
198 #ifndef PKCS12_BROKEN_KEYGEN
199 /* If less than v bytes pad with zeroes */
200 } else if (Ijlen < v) {
201 memset(I + j, 0, v - Ijlen);
202 if (!BN_bn2bin(Ij, I + j + v - Ijlen))
205 } else if (!BN_bn2bin(Ij, I + j))
211 PKCS12err(PKCS12_F_PKCS12_KEY_GEN_UNI, ERR_R_MALLOC_FAILURE);
220 EVP_MD_CTX_free(ctx);
224 #ifdef OPENSSL_DEBUG_KEYGEN
225 void h__dump(unsigned char *p, int len)
228 fprintf(stderr, "%02X", *p);
229 fprintf(stderr, "\n");