diff options
Diffstat (limited to 'core/lib/libtomcrypt/src/misc/pkcs5/pkcs_5_1.c')
| -rw-r--r-- | core/lib/libtomcrypt/src/misc/pkcs5/pkcs_5_1.c | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/core/lib/libtomcrypt/src/misc/pkcs5/pkcs_5_1.c b/core/lib/libtomcrypt/src/misc/pkcs5/pkcs_5_1.c new file mode 100644 index 0000000..19d07ef --- /dev/null +++ b/core/lib/libtomcrypt/src/misc/pkcs5/pkcs_5_1.c @@ -0,0 +1,133 @@ +/* + * Copyright (c) 2001-2007, Tom St Denis + * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS 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 COPYRIGHT HOLDER OR 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. + */ + +/* LibTomCrypt, modular cryptographic library -- Tom St Denis + * + * LibTomCrypt is a library that provides various cryptographic + * algorithms in a highly modular and flexible manner. + * + * The library is free for all purposes without any express + * guarantee it works. + * + * Tom St Denis, tomstdenis@gmail.com, http://libtom.org + */ +#include <tomcrypt.h> + +/** + @file pkcs_5_1.c + LTC_PKCS #5, Algorithm #1, Tom St Denis +*/ +#ifdef LTC_PKCS_5 +/** + Execute LTC_PKCS #5 v1 + @param password The password (or key) + @param password_len The length of the password (octet) + @param salt The salt (or nonce) which is 8 octets long + @param iteration_count The LTC_PKCS #5 v1 iteration count + @param hash_idx The index of the hash desired + @param out [out] The destination for this algorithm + @param outlen [in/out] The max size and resulting size of the algorithm output + @return CRYPT_OK if successful +*/ +int pkcs_5_alg1(const unsigned char *password, unsigned long password_len, + const unsigned char *salt, + int iteration_count, int hash_idx, + unsigned char *out, unsigned long *outlen) +{ + int err; + unsigned long x; + hash_state *md; + unsigned char *buf; + + LTC_ARGCHK(password != NULL); + LTC_ARGCHK(salt != NULL); + LTC_ARGCHK(out != NULL); + LTC_ARGCHK(outlen != NULL); + + /* test hash IDX */ + if ((err = hash_is_valid(hash_idx)) != CRYPT_OK) { + return err; + } + + /* allocate memory */ + md = XMALLOC(sizeof(hash_state)); + buf = XMALLOC(MAXBLOCKSIZE); + if (md == NULL || buf == NULL) { + if (md != NULL) { + XFREE(md); + } + if (buf != NULL) { + XFREE(buf); + } + return CRYPT_MEM; + } + + /* hash initial password + salt */ + if ((err = hash_descriptor[hash_idx].init(md)) != CRYPT_OK) { + goto LBL_ERR; + } + if ((err = hash_descriptor[hash_idx].process(md, password, password_len)) != CRYPT_OK) { + goto LBL_ERR; + } + if ((err = hash_descriptor[hash_idx].process(md, salt, 8)) != CRYPT_OK) { + goto LBL_ERR; + } + if ((err = hash_descriptor[hash_idx].done(md, buf)) != CRYPT_OK) { + goto LBL_ERR; + } + + while (--iteration_count) { + /* code goes here. */ + x = MAXBLOCKSIZE; + if ((err = hash_memory(hash_idx, buf, hash_descriptor[hash_idx].hashsize, buf, &x)) != CRYPT_OK) { + goto LBL_ERR; + } + } + + /* copy upto outlen bytes */ + for (x = 0; x < hash_descriptor[hash_idx].hashsize && x < *outlen; x++) { + out[x] = buf[x]; + } + *outlen = x; + err = CRYPT_OK; +LBL_ERR: +#ifdef LTC_CLEAN_STACK + zeromem(buf, MAXBLOCKSIZE); + zeromem(md, sizeof(hash_state)); +#endif + + XFREE(buf); + XFREE(md); + + return err; +} + +#endif + +/* $Source: /cvs/libtom/libtomcrypt/src/misc/pkcs5/pkcs_5_1.c,v $ */ +/* $Revision: 1.7 $ */ +/* $Date: 2007/05/12 14:32:35 $ */ |