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8d8c7266 DSH |
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> | |
ee0508d4 | 60 | #include "cryptlib.h" |
ec577822 | 61 | #include <openssl/pkcs12.h> |
8d8c7266 DSH |
62 | |
63 | ||
64 | /* Uncomment out this line to get debugging info about key generation */ | |
65 | /*#define DEBUG_KEYGEN*/ | |
66 | #ifdef DEBUG_KEYGEN | |
67 | #include <bio.h> | |
68 | extern BIO *bio_err; | |
69 | void 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 | ||
61f5b6f3 | 77 | int PKCS12_key_gen_asc (const char *pass, int passlen, unsigned char *salt, |
6b691a5c UM |
78 | int saltlen, int id, int iter, int n, unsigned char *out, |
79 | const EVP_MD *md_type) | |
8d8c7266 DSH |
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 | ||
6b691a5c UM |
95 | int 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) | |
8d8c7266 DSH |
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 | BIO_printf (bio_err, "KEYGEN DEBUG\n"); | |
108 | BIO_printf (bio_err, "ID %d, ITER %d\n", id, iter); | |
109 | BIO_printf (bio_err, "Password (length %d):\n", passlen); | |
110 | h__dump (pass, passlen); | |
111 | BIO_printf (bio_err, "Salt (length %d):\n", saltlen); | |
112 | h__dump (salt, saltlen); | |
113 | BIO_printf (bio_err, "ID %d, ITER %d\n\n", id, iter); | |
114 | #endif | |
115 | v = EVP_MD_block_size (md_type); | |
116 | u = EVP_MD_size (md_type); | |
117 | D = Malloc (v); | |
118 | Ai = Malloc (u); | |
119 | B = Malloc (v + 1); | |
120 | Slen = v * ((saltlen+v-1)/v); | |
121 | Plen = v * ((passlen+v-1)/v); | |
122 | Ilen = Slen + Plen; | |
123 | I = Malloc (Ilen); | |
124 | Ij = BN_new(); | |
125 | Bpl1 = BN_new(); | |
126 | if (!D || !Ai || !B || !I || !Ij || !Bpl1) { | |
127 | PKCS12err(PKCS12_F_PKCS12_KEY_GEN_UNI,ERR_R_MALLOC_FAILURE); | |
128 | return 0; | |
129 | } | |
130 | for (i = 0; i < v; i++) D[i] = id; | |
131 | p = I; | |
132 | for (i = 0; i < Slen; i++) *p++ = salt[i % saltlen]; | |
133 | for (i = 0; i < Plen; i++) *p++ = pass[i % passlen]; | |
134 | for (;;) { | |
135 | EVP_DigestInit (&ctx, md_type); | |
136 | EVP_DigestUpdate (&ctx, D, v); | |
137 | EVP_DigestUpdate (&ctx, I, Ilen); | |
138 | EVP_DigestFinal (&ctx, Ai, NULL); | |
139 | for (j = 1; j < iter; j++) { | |
140 | EVP_DigestInit (&ctx, md_type); | |
141 | EVP_DigestUpdate (&ctx, Ai, u); | |
142 | EVP_DigestFinal (&ctx, Ai, NULL); | |
143 | } | |
144 | memcpy (out, Ai, min (n, u)); | |
145 | if (u >= n) { | |
146 | Free (Ai); | |
147 | Free (B); | |
148 | Free (D); | |
149 | Free (I); | |
150 | BN_free (Ij); | |
151 | BN_free (Bpl1); | |
152 | #ifdef DEBUG_KEYGEN | |
153 | BIO_printf (bio_err, "Output KEY (length %d)\n", tmpn); | |
154 | h__dump (tmpout, tmpn); | |
155 | #endif | |
156 | return 1; | |
157 | } | |
158 | n -= u; | |
159 | out += u; | |
160 | for (j = 0; j < v; j++) B[j] = Ai[j % u]; | |
161 | /* Work out B + 1 first then can use B as tmp space */ | |
162 | BN_bin2bn (B, v, Bpl1); | |
163 | BN_add_word (Bpl1, 1); | |
164 | for (j = 0; j < Ilen ; j+=v) { | |
165 | BN_bin2bn (I + j, v, Ij); | |
166 | BN_add (Ij, Ij, Bpl1); | |
167 | BN_bn2bin (Ij, B); | |
168 | /* If more than 2^(v*8) - 1 cut off MSB */ | |
169 | if (BN_num_bytes (Ij) > v) { | |
170 | BN_bn2bin (Ij, B); | |
171 | memcpy (I + j, B + 1, v); | |
172 | } else BN_bn2bin (Ij, I + j); | |
173 | } | |
174 | } | |
175 | return 0; /* This can't happen */ | |
176 | } | |
177 | #ifdef DEBUG_KEYGEN | |
6b691a5c | 178 | void h__dump (unsigned char *p, int len) |
8d8c7266 DSH |
179 | { |
180 | for (; len --; p++) BIO_printf (bio_err, "%02X", *p); | |
181 | BIO_printf (bio_err, "\n"); | |
182 | } | |
183 | #endif |