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Diffstat (limited to 'src/crypto/evp/pbkdf.c')
| -rw-r--r-- | src/crypto/evp/pbkdf.c | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/src/crypto/evp/pbkdf.c b/src/crypto/evp/pbkdf.c new file mode 100644 index 0000000..be6ed86 --- /dev/null +++ b/src/crypto/evp/pbkdf.c @@ -0,0 +1,135 @@ +/* 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 <openssl/evp.h> + +#include <string.h> + +#include <openssl/hmac.h> + + +int PKCS5_PBKDF2_HMAC(const char *password, size_t password_len, + const uint8_t *salt, size_t salt_len, unsigned iterations, + const EVP_MD *digest, size_t key_len, uint8_t *out_key) { + uint8_t digest_tmp[EVP_MAX_MD_SIZE], *p, itmp[4]; + size_t cplen, mdlen, tkeylen, k; + unsigned j; + uint32_t i = 1; + HMAC_CTX hctx_tpl, hctx; + + mdlen = EVP_MD_size(digest); + HMAC_CTX_init(&hctx_tpl); + p = out_key; + tkeylen = key_len; + if (!HMAC_Init_ex(&hctx_tpl, password, password_len, digest, NULL)) { + HMAC_CTX_cleanup(&hctx_tpl); + return 0; + } + while (tkeylen) { + if (tkeylen > mdlen) { + cplen = mdlen; + } else { + cplen = tkeylen; + } + /* We are unlikely to ever use more than 256 blocks (5120 bits!) + * but just in case... */ + itmp[0] = (uint8_t)((i >> 24) & 0xff); + itmp[1] = (uint8_t)((i >> 16) & 0xff); + itmp[2] = (uint8_t)((i >> 8) & 0xff); + itmp[3] = (uint8_t)(i & 0xff); + if (!HMAC_CTX_copy(&hctx, &hctx_tpl)) { + HMAC_CTX_cleanup(&hctx_tpl); + return 0; + } + if (!HMAC_Update(&hctx, salt, salt_len) || + !HMAC_Update(&hctx, itmp, 4) || + !HMAC_Final(&hctx, digest_tmp, NULL)) { + HMAC_CTX_cleanup(&hctx_tpl); + HMAC_CTX_cleanup(&hctx); + return 0; + } + HMAC_CTX_cleanup(&hctx); + memcpy(p, digest_tmp, cplen); + for (j = 1; j < iterations; j++) { + if (!HMAC_CTX_copy(&hctx, &hctx_tpl)) { + HMAC_CTX_cleanup(&hctx_tpl); + return 0; + } + if (!HMAC_Update(&hctx, digest_tmp, mdlen) || + !HMAC_Final(&hctx, digest_tmp, NULL)) { + HMAC_CTX_cleanup(&hctx_tpl); + HMAC_CTX_cleanup(&hctx); + return 0; + } + HMAC_CTX_cleanup(&hctx); + for (k = 0; k < cplen; k++) { + p[k] ^= digest_tmp[k]; + } + } + tkeylen -= cplen; + i++; + p += cplen; + } + HMAC_CTX_cleanup(&hctx_tpl); + return 1; +} + +int PKCS5_PBKDF2_HMAC_SHA1(const char *password, size_t password_len, + const uint8_t *salt, size_t salt_len, + unsigned iterations, size_t key_len, + uint8_t *out_key) { + return PKCS5_PBKDF2_HMAC(password, password_len, salt, salt_len, iterations, + EVP_sha1(), key_len, out_key); +} |