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diff --git a/src/lib/libcrypto/pkcs12/p12_key.c b/src/lib/libcrypto/pkcs12/p12_key.c
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1/* p12_key.c */
2/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
3 * project 1999.
4 */
5/* ====================================================================
6 * Copyright (c) 1999 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
59#include <stdio.h>
60#include "cryptlib.h"
61#include <openssl/pkcs12.h>
62
63
64/* Uncomment out this line to get debugging info about key generation */
65/*#define DEBUG_KEYGEN*/
66#ifdef DEBUG_KEYGEN
67#include <openssl/bio.h>
68extern BIO *bio_err;
69void h__dump (unsigned char *p, int len);
70#endif
71
72/* PKCS12 compatible key/IV generation */
73#ifndef min
74#define min(a,b) ((a) < (b) ? (a) : (b))
75#endif
76
77int PKCS12_key_gen_asc (const char *pass, int passlen, unsigned char *salt,
78 int saltlen, int id, int iter, int n, unsigned char *out,
79 const EVP_MD *md_type)
80{
81 int ret;
82 unsigned char *unipass;
83 int uniplen;
84 if (!asc2uni (pass, &unipass, &uniplen)) {
85 PKCS12err(PKCS12_F_PKCS12_KEY_GEN_ASC,ERR_R_MALLOC_FAILURE);
86 return 0;
87 }
88 ret = PKCS12_key_gen_uni (unipass, uniplen, salt, saltlen,
89 id, iter, n, out, md_type);
90 memset(unipass, 0, uniplen); /* Clear password from memory */
91 Free(unipass);
92 return ret;
93}
94
95int PKCS12_key_gen_uni (unsigned char *pass, int passlen, unsigned char *salt,
96 int saltlen, int id, int iter, int n, unsigned char *out,
97 const EVP_MD *md_type)
98{
99 unsigned char *B, *D, *I, *p, *Ai;
100 int Slen, Plen, Ilen;
101 int i, j, u, v;
102 BIGNUM *Ij, *Bpl1; /* These hold Ij and B + 1 */
103 EVP_MD_CTX ctx;
104#ifdef DEBUG_KEYGEN
105 unsigned char *tmpout = out;
106 int tmpn = n;
107#endif
108
109 if (!pass) {
110 PKCS12err(PKCS12_F_PKCS12_KEY_GEN_UNI,ERR_R_PASSED_NULL_PARAMETER);
111 return 0;
112 }
113
114#ifdef DEBUG_KEYGEN
115 fprintf(stderr, "KEYGEN DEBUG\n");
116 fprintf(stderr, "ID %d, ITER %d\n", id, iter);
117 fprintf(stderr, "Password (length %d):\n", passlen);
118 h__dump(pass, passlen);
119 fprintf(stderr, "Salt (length %d):\n", saltlen);
120 h__dump(salt, saltlen);
121#endif
122 v = EVP_MD_block_size (md_type);
123 u = EVP_MD_size (md_type);
124 D = Malloc (v);
125 Ai = Malloc (u);
126 B = Malloc (v + 1);
127 Slen = v * ((saltlen+v-1)/v);
128 Plen = v * ((passlen+v-1)/v);
129 Ilen = Slen + Plen;
130 I = Malloc (Ilen);
131 Ij = BN_new();
132 Bpl1 = BN_new();
133 if (!D || !Ai || !B || !I || !Ij || !Bpl1) {
134 PKCS12err(PKCS12_F_PKCS12_KEY_GEN_UNI,ERR_R_MALLOC_FAILURE);
135 return 0;
136 }
137 for (i = 0; i < v; i++) D[i] = id;
138 p = I;
139 for (i = 0; i < Slen; i++) *p++ = salt[i % saltlen];
140 for (i = 0; i < Plen; i++) *p++ = pass[i % passlen];
141 for (;;) {
142 EVP_DigestInit (&ctx, md_type);
143 EVP_DigestUpdate (&ctx, D, v);
144 EVP_DigestUpdate (&ctx, I, Ilen);
145 EVP_DigestFinal (&ctx, Ai, NULL);
146 for (j = 1; j < iter; j++) {
147 EVP_DigestInit (&ctx, md_type);
148 EVP_DigestUpdate (&ctx, Ai, u);
149 EVP_DigestFinal (&ctx, Ai, NULL);
150 }
151 memcpy (out, Ai, min (n, u));
152 if (u >= n) {
153 Free (Ai);
154 Free (B);
155 Free (D);
156 Free (I);
157 BN_free (Ij);
158 BN_free (Bpl1);
159#ifdef DEBUG_KEYGEN
160 fprintf(stderr, "Output KEY (length %d)\n", tmpn);
161 h__dump(tmpout, tmpn);
162#endif
163 return 1;
164 }
165 n -= u;
166 out += u;
167 for (j = 0; j < v; j++) B[j] = Ai[j % u];
168 /* Work out B + 1 first then can use B as tmp space */
169 BN_bin2bn (B, v, Bpl1);
170 BN_add_word (Bpl1, 1);
171 for (j = 0; j < Ilen ; j+=v) {
172 BN_bin2bn (I + j, v, Ij);
173 BN_add (Ij, Ij, Bpl1);
174 BN_bn2bin (Ij, B);
175 /* If more than 2^(v*8) - 1 cut off MSB */
176 if (BN_num_bytes (Ij) > v) {
177 BN_bn2bin (Ij, B);
178 memcpy (I + j, B + 1, v);
179 } else BN_bn2bin (Ij, I + j);
180 }
181 }
182}
183#ifdef DEBUG_KEYGEN
184void h__dump (unsigned char *p, int len)
185{
186 for (; len --; p++) fprintf(stderr, "%02X", *p);
187 fprintf(stderr, "\n");
188}
189#endif