Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 1 | /* p12_key.c */ |
| 2 | /* Written by Dr Stephen N Henson (steve@openssl.org) 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 | #include <openssl/bn.h> |
| 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> |
| 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 | |
| 77 | int 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 | |
| 85 | if(!pass) { |
| 86 | unipass = NULL; |
| 87 | uniplen = 0; |
| 88 | } else if (!OPENSSL_asc2uni(pass, passlen, &unipass, &uniplen)) { |
| 89 | PKCS12err(PKCS12_F_PKCS12_KEY_GEN_ASC,ERR_R_MALLOC_FAILURE); |
| 90 | return 0; |
| 91 | } |
| 92 | ret = PKCS12_key_gen_uni(unipass, uniplen, salt, saltlen, |
| 93 | id, iter, n, out, md_type); |
| 94 | if (ret <= 0) |
| 95 | return 0; |
| 96 | if(unipass) { |
| 97 | OPENSSL_cleanse(unipass, uniplen); /* Clear password from memory */ |
| 98 | OPENSSL_free(unipass); |
| 99 | } |
| 100 | return ret; |
| 101 | } |
| 102 | |
| 103 | int PKCS12_key_gen_uni(unsigned char *pass, int passlen, unsigned char *salt, |
| 104 | int saltlen, int id, int iter, int n, unsigned char *out, |
| 105 | const EVP_MD *md_type) |
| 106 | { |
| 107 | unsigned char *B, *D, *I, *p, *Ai; |
| 108 | int Slen, Plen, Ilen, Ijlen; |
| 109 | int i, j, u, v; |
| 110 | int ret = 0; |
| 111 | BIGNUM *Ij, *Bpl1; /* These hold Ij and B + 1 */ |
| 112 | EVP_MD_CTX ctx; |
| 113 | #ifdef DEBUG_KEYGEN |
| 114 | unsigned char *tmpout = out; |
| 115 | int tmpn = n; |
| 116 | #endif |
| 117 | |
| 118 | #if 0 |
| 119 | if (!pass) { |
| 120 | PKCS12err(PKCS12_F_PKCS12_KEY_GEN_UNI,ERR_R_PASSED_NULL_PARAMETER); |
| 121 | return 0; |
| 122 | } |
| 123 | #endif |
| 124 | |
| 125 | EVP_MD_CTX_init(&ctx); |
| 126 | #ifdef DEBUG_KEYGEN |
| 127 | fprintf(stderr, "KEYGEN DEBUG\n"); |
| 128 | fprintf(stderr, "ID %d, ITER %d\n", id, iter); |
| 129 | fprintf(stderr, "Password (length %d):\n", passlen); |
| 130 | h__dump(pass, passlen); |
| 131 | fprintf(stderr, "Salt (length %d):\n", saltlen); |
| 132 | h__dump(salt, saltlen); |
| 133 | #endif |
| 134 | v = EVP_MD_block_size (md_type); |
| 135 | u = EVP_MD_size (md_type); |
| 136 | if (u < 0) |
| 137 | return 0; |
| 138 | D = OPENSSL_malloc (v); |
| 139 | Ai = OPENSSL_malloc (u); |
| 140 | B = OPENSSL_malloc (v + 1); |
| 141 | Slen = v * ((saltlen+v-1)/v); |
| 142 | if(passlen) Plen = v * ((passlen+v-1)/v); |
| 143 | else Plen = 0; |
| 144 | Ilen = Slen + Plen; |
| 145 | I = OPENSSL_malloc (Ilen); |
| 146 | Ij = BN_new(); |
| 147 | Bpl1 = BN_new(); |
| 148 | if (!D || !Ai || !B || !I || !Ij || !Bpl1) |
| 149 | goto err; |
| 150 | for (i = 0; i < v; i++) D[i] = id; |
| 151 | p = I; |
| 152 | for (i = 0; i < Slen; i++) *p++ = salt[i % saltlen]; |
| 153 | for (i = 0; i < Plen; i++) *p++ = pass[i % passlen]; |
| 154 | for (;;) { |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 155 | EVP_DigestInit_ex(&ctx, md_type, NULL); |
| 156 | EVP_DigestUpdate(&ctx, D, v); |
| 157 | EVP_DigestUpdate(&ctx, I, Ilen); |
| 158 | EVP_DigestFinal_ex(&ctx, Ai, NULL); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 159 | for (j = 1; j < iter; j++) { |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 160 | EVP_DigestInit_ex(&ctx, md_type, NULL); |
| 161 | EVP_DigestUpdate(&ctx, Ai, u); |
| 162 | EVP_DigestFinal_ex(&ctx, Ai, NULL); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 163 | } |
| 164 | memcpy (out, Ai, min (n, u)); |
| 165 | if (u >= n) { |
| 166 | #ifdef DEBUG_KEYGEN |
| 167 | fprintf(stderr, "Output KEY (length %d)\n", tmpn); |
| 168 | h__dump(tmpout, tmpn); |
| 169 | #endif |
| 170 | ret = 1; |
| 171 | goto end; |
| 172 | } |
| 173 | n -= u; |
| 174 | out += u; |
| 175 | for (j = 0; j < v; j++) B[j] = Ai[j % u]; |
| 176 | /* Work out B + 1 first then can use B as tmp space */ |
| 177 | if (!BN_bin2bn (B, v, Bpl1)) goto err; |
| 178 | if (!BN_add_word (Bpl1, 1)) goto err; |
| 179 | for (j = 0; j < Ilen ; j+=v) { |
| 180 | if (!BN_bin2bn (I + j, v, Ij)) goto err; |
| 181 | if (!BN_add (Ij, Ij, Bpl1)) goto err; |
| 182 | BN_bn2bin (Ij, B); |
| 183 | Ijlen = BN_num_bytes (Ij); |
| 184 | /* If more than 2^(v*8) - 1 cut off MSB */ |
| 185 | if (Ijlen > v) { |
| 186 | BN_bn2bin (Ij, B); |
| 187 | memcpy (I + j, B + 1, v); |
| 188 | #ifndef PKCS12_BROKEN_KEYGEN |
| 189 | /* If less than v bytes pad with zeroes */ |
| 190 | } else if (Ijlen < v) { |
| 191 | memset(I + j, 0, v - Ijlen); |
| 192 | BN_bn2bin(Ij, I + j + v - Ijlen); |
| 193 | #endif |
| 194 | } else BN_bn2bin (Ij, I + j); |
| 195 | } |
| 196 | } |
| 197 | |
| 198 | err: |
| 199 | PKCS12err(PKCS12_F_PKCS12_KEY_GEN_UNI,ERR_R_MALLOC_FAILURE); |
| 200 | |
| 201 | end: |
| 202 | OPENSSL_free (Ai); |
| 203 | OPENSSL_free (B); |
| 204 | OPENSSL_free (D); |
| 205 | OPENSSL_free (I); |
| 206 | BN_free (Ij); |
| 207 | BN_free (Bpl1); |
| 208 | EVP_MD_CTX_cleanup(&ctx); |
| 209 | return ret; |
| 210 | } |
| 211 | #ifdef DEBUG_KEYGEN |
| 212 | void h__dump (unsigned char *p, int len) |
| 213 | { |
| 214 | for (; len --; p++) fprintf(stderr, "%02X", *p); |
| 215 | fprintf(stderr, "\n"); |
| 216 | } |
| 217 | #endif |