/* p12_key.c */ /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL * project 1999. */ /* ==================================================================== * Copyright (c) 1999 The OpenSSL Project. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * 3. All advertising materials mentioning features or use of this * software must display the following acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" * * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to * endorse or promote products derived from this software without * prior written permission. For written permission, please contact * licensing@OpenSSL.org. * * 5. Products derived from this software may not be called "OpenSSL" * nor may "OpenSSL" appear in their names without prior written * permission of the OpenSSL Project. * * 6. Redistributions of any form whatsoever must retain the following * acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" * * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * ==================================================================== * * This product includes cryptographic software written by Eric Young * (eay@cryptsoft.com). This product includes software written by Tim * Hudson (tjh@cryptsoft.com). * */ #include <stdio.h> #include "cryptlib.h" #include <openssl/pkcs12.h> #include <openssl/bn.h> /* Uncomment out this line to get debugging info about key generation */ /*#define DEBUG_KEYGEN*/ #ifdef DEBUG_KEYGEN #include <openssl/bio.h> extern BIO *bio_err; void h__dump (unsigned char *p, int len); #endif #ifdef OPENSSL_SYS_NETWARE /* Rename these functions to avoid name clashes on NetWare OS */ #define uni2asc OPENSSL_uni2asc #define asc2uni OPENSSL_asc2uni #endif /* PKCS12 compatible key/IV generation */ #ifndef min #define min(a,b) ((a) < (b) ? (a) : (b)) #endif int PKCS12_key_gen_asc(const char *pass, int passlen, unsigned char *salt, int saltlen, int id, int iter, int n, unsigned char *out, const EVP_MD *md_type) { int ret; unsigned char *unipass; int uniplen; if(!pass) { unipass = NULL; uniplen = 0; } else if (!asc2uni(pass, passlen, &unipass, &uniplen)) { PKCS12err(PKCS12_F_PKCS12_KEY_GEN_ASC,ERR_R_MALLOC_FAILURE); return 0; } ret = PKCS12_key_gen_uni(unipass, uniplen, salt, saltlen, id, iter, n, out, md_type); if(unipass) { OPENSSL_cleanse(unipass, uniplen); /* Clear password from memory */ OPENSSL_free(unipass); } return ret; } int PKCS12_key_gen_uni(unsigned char *pass, int passlen, unsigned char *salt, int saltlen, int id, int iter, int n, unsigned char *out, const EVP_MD *md_type) { unsigned char *B, *D, *I, *p, *Ai; int Slen, Plen, Ilen, Ijlen; int i, j, u, v; BIGNUM *Ij, *Bpl1; /* These hold Ij and B + 1 */ EVP_MD_CTX ctx; #ifdef DEBUG_KEYGEN unsigned char *tmpout = out; int tmpn = n; #endif #if 0 if (!pass) { PKCS12err(PKCS12_F_PKCS12_KEY_GEN_UNI,ERR_R_PASSED_NULL_PARAMETER); return 0; } #endif EVP_MD_CTX_init(&ctx); #ifdef DEBUG_KEYGEN fprintf(stderr, "KEYGEN DEBUG\n"); fprintf(stderr, "ID %d, ITER %d\n", id, iter); fprintf(stderr, "Password (length %d):\n", passlen); h__dump(pass, passlen); fprintf(stderr, "Salt (length %d):\n", saltlen); h__dump(salt, saltlen); #endif v = EVP_MD_block_size (md_type); u = EVP_MD_size (md_type); D = OPENSSL_malloc (v); Ai = OPENSSL_malloc (u); B = OPENSSL_malloc (v + 1); Slen = v * ((saltlen+v-1)/v); if(passlen) Plen = v * ((passlen+v-1)/v); else Plen = 0; Ilen = Slen + Plen; I = OPENSSL_malloc (Ilen); Ij = BN_new(); Bpl1 = BN_new(); if (!D || !Ai || !B || !I || !Ij || !Bpl1) { PKCS12err(PKCS12_F_PKCS12_KEY_GEN_UNI,ERR_R_MALLOC_FAILURE); return 0; } for (i = 0; i < v; i++) D[i] = id; p = I; for (i = 0; i < Slen; i++) *p++ = salt[i % saltlen]; for (i = 0; i < Plen; i++) *p++ = pass[i % passlen]; for (;;) { EVP_DigestInit_ex(&ctx, md_type, NULL); EVP_DigestUpdate(&ctx, D, v); EVP_DigestUpdate(&ctx, I, Ilen); EVP_DigestFinal_ex(&ctx, Ai, NULL); for (j = 1; j < iter; j++) { EVP_DigestInit_ex(&ctx, md_type, NULL); EVP_DigestUpdate(&ctx, Ai, u); EVP_DigestFinal_ex(&ctx, Ai, NULL); } memcpy (out, Ai, min (n, u)); if (u >= n) { OPENSSL_free (Ai); OPENSSL_free (B); OPENSSL_free (D); OPENSSL_free (I); BN_free (Ij); BN_free (Bpl1); EVP_MD_CTX_cleanup(&ctx); #ifdef DEBUG_KEYGEN fprintf(stderr, "Output KEY (length %d)\n", tmpn); h__dump(tmpout, tmpn); #endif return 1; } n -= u; out += u; for (j = 0; j < v; j++) B[j] = Ai[j % u]; /* Work out B + 1 first then can use B as tmp space */ BN_bin2bn (B, v, Bpl1); BN_add_word (Bpl1, 1); for (j = 0; j < Ilen ; j+=v) { BN_bin2bn (I + j, v, Ij); BN_add (Ij, Ij, Bpl1); BN_bn2bin (Ij, B); Ijlen = BN_num_bytes (Ij); /* If more than 2^(v*8) - 1 cut off MSB */ if (Ijlen > v) { BN_bn2bin (Ij, B); memcpy (I + j, B + 1, v); #ifndef PKCS12_BROKEN_KEYGEN /* If less than v bytes pad with zeroes */ } else if (Ijlen < v) { memset(I + j, 0, v - Ijlen); BN_bn2bin(Ij, I + j + v - Ijlen); #endif } else BN_bn2bin (Ij, I + j); } } } #ifdef DEBUG_KEYGEN void h__dump (unsigned char *p, int len) { for (; len --; p++) fprintf(stderr, "%02X", *p); fprintf(stderr, "\n"); } #endif