155714Skris/* p12_key.c */ 2296341Sdelphij/* 3296341Sdelphij * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project 4296341Sdelphij * 1999. 555714Skris */ 655714Skris/* ==================================================================== 755714Skris * Copyright (c) 1999 The OpenSSL Project. All rights reserved. 855714Skris * 955714Skris * Redistribution and use in source and binary forms, with or without 1055714Skris * modification, are permitted provided that the following conditions 1155714Skris * are met: 1255714Skris * 1355714Skris * 1. Redistributions of source code must retain the above copyright 14296341Sdelphij * notice, this list of conditions and the following disclaimer. 1555714Skris * 1655714Skris * 2. Redistributions in binary form must reproduce the above copyright 1755714Skris * notice, this list of conditions and the following disclaimer in 1855714Skris * the documentation and/or other materials provided with the 1955714Skris * distribution. 2055714Skris * 2155714Skris * 3. All advertising materials mentioning features or use of this 2255714Skris * software must display the following acknowledgment: 2355714Skris * "This product includes software developed by the OpenSSL Project 2455714Skris * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" 2555714Skris * 2655714Skris * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 2755714Skris * endorse or promote products derived from this software without 2855714Skris * prior written permission. For written permission, please contact 2955714Skris * licensing@OpenSSL.org. 3055714Skris * 3155714Skris * 5. Products derived from this software may not be called "OpenSSL" 3255714Skris * nor may "OpenSSL" appear in their names without prior written 3355714Skris * permission of the OpenSSL Project. 3455714Skris * 3555714Skris * 6. Redistributions of any form whatsoever must retain the following 3655714Skris * acknowledgment: 3755714Skris * "This product includes software developed by the OpenSSL Project 3855714Skris * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" 3955714Skris * 4055714Skris * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 4155714Skris * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 4255714Skris * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 4355714Skris * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 4455714Skris * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 4555714Skris * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 4655714Skris * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 4755714Skris * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 4855714Skris * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 4955714Skris * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 5055714Skris * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 5155714Skris * OF THE POSSIBILITY OF SUCH DAMAGE. 5255714Skris * ==================================================================== 5355714Skris * 5455714Skris * This product includes cryptographic software written by Eric Young 5555714Skris * (eay@cryptsoft.com). This product includes software written by Tim 5655714Skris * Hudson (tjh@cryptsoft.com). 5755714Skris * 5855714Skris */ 5955714Skris 6055714Skris#include <stdio.h> 6155714Skris#include "cryptlib.h" 6255714Skris#include <openssl/pkcs12.h> 63160814Ssimon#include <openssl/bn.h> 6455714Skris 6555714Skris/* Uncomment out this line to get debugging info about key generation */ 66296341Sdelphij/* 67296341Sdelphij * #define DEBUG_KEYGEN 68296341Sdelphij */ 6955714Skris#ifdef DEBUG_KEYGEN 70296341Sdelphij# include <openssl/bio.h> 7155714Skrisextern BIO *bio_err; 72296341Sdelphijvoid h__dump(unsigned char *p, int len); 7355714Skris#endif 7455714Skris 7555714Skris/* PKCS12 compatible key/IV generation */ 7655714Skris#ifndef min 77296341Sdelphij# define min(a,b) ((a) < (b) ? (a) : (b)) 7855714Skris#endif 7955714Skris 8068651Skrisint PKCS12_key_gen_asc(const char *pass, int passlen, unsigned char *salt, 81296341Sdelphij int saltlen, int id, int iter, int n, 82296341Sdelphij unsigned char *out, const EVP_MD *md_type) 8355714Skris{ 84296341Sdelphij int ret; 85296341Sdelphij unsigned char *unipass; 86296341Sdelphij int uniplen; 87238405Sjkim 88296341Sdelphij if (!pass) { 89296341Sdelphij unipass = NULL; 90296341Sdelphij uniplen = 0; 91296341Sdelphij } else if (!OPENSSL_asc2uni(pass, passlen, &unipass, &uniplen)) { 92296341Sdelphij PKCS12err(PKCS12_F_PKCS12_KEY_GEN_ASC, ERR_R_MALLOC_FAILURE); 93296341Sdelphij return 0; 94296341Sdelphij } 95296341Sdelphij ret = PKCS12_key_gen_uni(unipass, uniplen, salt, saltlen, 96296341Sdelphij id, iter, n, out, md_type); 97296341Sdelphij if (ret <= 0) 98296341Sdelphij return 0; 99296341Sdelphij if (unipass) { 100296341Sdelphij OPENSSL_cleanse(unipass, uniplen); /* Clear password from memory */ 101296341Sdelphij OPENSSL_free(unipass); 102296341Sdelphij } 103296341Sdelphij return ret; 10455714Skris} 10555714Skris 10668651Skrisint PKCS12_key_gen_uni(unsigned char *pass, int passlen, unsigned char *salt, 107296341Sdelphij int saltlen, int id, int iter, int n, 108296341Sdelphij unsigned char *out, const EVP_MD *md_type) 10955714Skris{ 110296341Sdelphij unsigned char *B, *D, *I, *p, *Ai; 111296341Sdelphij int Slen, Plen, Ilen, Ijlen; 112296341Sdelphij int i, j, u, v; 113296341Sdelphij int ret = 0; 114296341Sdelphij BIGNUM *Ij, *Bpl1; /* These hold Ij and B + 1 */ 115296341Sdelphij EVP_MD_CTX ctx; 11655714Skris#ifdef DEBUG_KEYGEN 117296341Sdelphij unsigned char *tmpout = out; 118296341Sdelphij int tmpn = n; 11955714Skris#endif 12059191Skris 12168651Skris#if 0 122296341Sdelphij if (!pass) { 123296341Sdelphij PKCS12err(PKCS12_F_PKCS12_KEY_GEN_UNI, ERR_R_PASSED_NULL_PARAMETER); 124296341Sdelphij return 0; 125296341Sdelphij } 12668651Skris#endif 12759191Skris 128296341Sdelphij EVP_MD_CTX_init(&ctx); 12959191Skris#ifdef DEBUG_KEYGEN 130296341Sdelphij fprintf(stderr, "KEYGEN DEBUG\n"); 131296341Sdelphij fprintf(stderr, "ID %d, ITER %d\n", id, iter); 132296341Sdelphij fprintf(stderr, "Password (length %d):\n", passlen); 133296341Sdelphij h__dump(pass, passlen); 134296341Sdelphij fprintf(stderr, "Salt (length %d):\n", saltlen); 135296341Sdelphij h__dump(salt, saltlen); 13659191Skris#endif 137296341Sdelphij v = EVP_MD_block_size(md_type); 138296341Sdelphij u = EVP_MD_size(md_type); 139296341Sdelphij if (u < 0) 140296341Sdelphij return 0; 141296341Sdelphij D = OPENSSL_malloc(v); 142296341Sdelphij Ai = OPENSSL_malloc(u); 143296341Sdelphij B = OPENSSL_malloc(v + 1); 144296341Sdelphij Slen = v * ((saltlen + v - 1) / v); 145296341Sdelphij if (passlen) 146296341Sdelphij Plen = v * ((passlen + v - 1) / v); 147296341Sdelphij else 148296341Sdelphij Plen = 0; 149296341Sdelphij Ilen = Slen + Plen; 150296341Sdelphij I = OPENSSL_malloc(Ilen); 151296341Sdelphij Ij = BN_new(); 152296341Sdelphij Bpl1 = BN_new(); 153296341Sdelphij if (!D || !Ai || !B || !I || !Ij || !Bpl1) 154296341Sdelphij goto err; 155296341Sdelphij for (i = 0; i < v; i++) 156296341Sdelphij D[i] = id; 157296341Sdelphij p = I; 158296341Sdelphij for (i = 0; i < Slen; i++) 159296341Sdelphij *p++ = salt[i % saltlen]; 160296341Sdelphij for (i = 0; i < Plen; i++) 161296341Sdelphij *p++ = pass[i % passlen]; 162296341Sdelphij for (;;) { 163296341Sdelphij if (!EVP_DigestInit_ex(&ctx, md_type, NULL) 164296341Sdelphij || !EVP_DigestUpdate(&ctx, D, v) 165296341Sdelphij || !EVP_DigestUpdate(&ctx, I, Ilen) 166296341Sdelphij || !EVP_DigestFinal_ex(&ctx, Ai, NULL)) 167296341Sdelphij goto err; 168296341Sdelphij for (j = 1; j < iter; j++) { 169296341Sdelphij if (!EVP_DigestInit_ex(&ctx, md_type, NULL) 170296341Sdelphij || !EVP_DigestUpdate(&ctx, Ai, u) 171296341Sdelphij || !EVP_DigestFinal_ex(&ctx, Ai, NULL)) 172296341Sdelphij goto err; 173296341Sdelphij } 174296341Sdelphij memcpy(out, Ai, min(n, u)); 175296341Sdelphij if (u >= n) { 17655714Skris#ifdef DEBUG_KEYGEN 177296341Sdelphij fprintf(stderr, "Output KEY (length %d)\n", tmpn); 178296341Sdelphij h__dump(tmpout, tmpn); 17955714Skris#endif 180296341Sdelphij ret = 1; 181296341Sdelphij goto end; 182296341Sdelphij } 183296341Sdelphij n -= u; 184296341Sdelphij out += u; 185296341Sdelphij for (j = 0; j < v; j++) 186296341Sdelphij B[j] = Ai[j % u]; 187296341Sdelphij /* Work out B + 1 first then can use B as tmp space */ 188296341Sdelphij if (!BN_bin2bn(B, v, Bpl1)) 189296341Sdelphij goto err; 190296341Sdelphij if (!BN_add_word(Bpl1, 1)) 191296341Sdelphij goto err; 192296341Sdelphij for (j = 0; j < Ilen; j += v) { 193296341Sdelphij if (!BN_bin2bn(I + j, v, Ij)) 194296341Sdelphij goto err; 195296341Sdelphij if (!BN_add(Ij, Ij, Bpl1)) 196296341Sdelphij goto err; 197296341Sdelphij if (!BN_bn2bin(Ij, B)) 198296341Sdelphij goto err; 199296341Sdelphij Ijlen = BN_num_bytes(Ij); 200296341Sdelphij /* If more than 2^(v*8) - 1 cut off MSB */ 201296341Sdelphij if (Ijlen > v) { 202296341Sdelphij if (!BN_bn2bin(Ij, B)) 203296341Sdelphij goto err; 204296341Sdelphij memcpy(I + j, B + 1, v); 20576866Skris#ifndef PKCS12_BROKEN_KEYGEN 206296341Sdelphij /* If less than v bytes pad with zeroes */ 207296341Sdelphij } else if (Ijlen < v) { 208296341Sdelphij memset(I + j, 0, v - Ijlen); 209296341Sdelphij if (!BN_bn2bin(Ij, I + j + v - Ijlen)) 210296341Sdelphij goto err; 21176866Skris#endif 212296341Sdelphij } else if (!BN_bn2bin(Ij, I + j)) 213296341Sdelphij goto err; 214296341Sdelphij } 215296341Sdelphij } 216215697Ssimon 217296341Sdelphij err: 218296341Sdelphij PKCS12err(PKCS12_F_PKCS12_KEY_GEN_UNI, ERR_R_MALLOC_FAILURE); 219215697Ssimon 220296341Sdelphij end: 221296341Sdelphij OPENSSL_free(Ai); 222296341Sdelphij OPENSSL_free(B); 223296341Sdelphij OPENSSL_free(D); 224296341Sdelphij OPENSSL_free(I); 225296341Sdelphij BN_free(Ij); 226296341Sdelphij BN_free(Bpl1); 227296341Sdelphij EVP_MD_CTX_cleanup(&ctx); 228296341Sdelphij return ret; 22955714Skris} 230296341Sdelphij 23155714Skris#ifdef DEBUG_KEYGEN 232296341Sdelphijvoid h__dump(unsigned char *p, int len) 23355714Skris{ 234296341Sdelphij for (; len--; p++) 235296341Sdelphij fprintf(stderr, "%02X", *p); 236296341Sdelphij fprintf(stderr, "\n"); 23755714Skris} 23855714Skris#endif 239