diff options
Diffstat (limited to 'source4/heimdal/lib/hcrypto/evp-hcrypto.c')
| -rw-r--r-- | source4/heimdal/lib/hcrypto/evp-hcrypto.c | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/source4/heimdal/lib/hcrypto/evp-hcrypto.c b/source4/heimdal/lib/hcrypto/evp-hcrypto.c new file mode 100644 index 0000000000..6737fd817e --- /dev/null +++ b/source4/heimdal/lib/hcrypto/evp-hcrypto.c @@ -0,0 +1,176 @@ +/* + * Copyright (c) 2006 - 2008 Kungliga Tekniska Högskolan + * (Royal Institute of Technology, Stockholm, Sweden). + * 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. Neither the name of the Institute nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE 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 INSTITUTE 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. + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +RCSID("$Id$"); + +#define HC_DEPRECATED + +#include <sys/types.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <assert.h> + +#include <evp.h> + +#include <krb5-types.h> + +#include <aes.h> + +/* + * + */ + +static int +aes_init(EVP_CIPHER_CTX *ctx, + const unsigned char * key, + const unsigned char * iv, + int encp) +{ + AES_KEY *k = ctx->cipher_data; + if (ctx->encrypt) + AES_set_encrypt_key(key, ctx->cipher->key_len * 8, k); + else + AES_set_decrypt_key(key, ctx->cipher->key_len * 8, k); + return 1; +} + +static int +aes_do_cipher(EVP_CIPHER_CTX *ctx, + unsigned char *out, + const unsigned char *in, + unsigned int size) +{ + AES_KEY *k = ctx->cipher_data; + AES_cbc_encrypt(in, out, size, k, ctx->iv, ctx->encrypt); + return 1; +} + +static int +aes_cleanup(EVP_CIPHER_CTX *ctx) +{ + memset(ctx->cipher_data, 0, sizeof(AES_KEY)); + return 1; +} + +/** + * The AES-128 cipher type (hcrypto) + * + * @return the AES-128 EVP_CIPHER pointer. + * + * @ingroup hcrypto_evp + */ + +const EVP_CIPHER * +EVP_hcrypto_aes_128_cbc(void) +{ + static const EVP_CIPHER aes_128_cbc = { + 0, + 16, + 16, + 16, + EVP_CIPH_CBC_MODE, + aes_init, + aes_do_cipher, + aes_cleanup, + sizeof(AES_KEY), + NULL, + NULL, + NULL, + NULL + }; + + return &aes_128_cbc; +} + +/** + * The AES-192 cipher type (hcrypto) + * + * @return the AES-192 EVP_CIPHER pointer. + * + * @ingroup hcrypto_evp + */ + +const EVP_CIPHER * +EVP_hcrypto_aes_192_cbc(void) +{ + static const EVP_CIPHER aes_192_cbc = { + 0, + 16, + 24, + 16, + EVP_CIPH_CBC_MODE, + aes_init, + aes_do_cipher, + aes_cleanup, + sizeof(AES_KEY), + NULL, + NULL, + NULL, + NULL + }; + return &aes_192_cbc; +} + +/** + * The AES-256 cipher type (hcrypto) + * + * @return the AES-256 EVP_CIPHER pointer. + * + * @ingroup hcrypto_evp + */ + +const EVP_CIPHER * +EVP_hcrypto_aes_256_cbc(void) +{ + static const EVP_CIPHER aes_256_cbc = { + 0, + 16, + 32, + 16, + EVP_CIPH_CBC_MODE, + aes_init, + aes_do_cipher, + aes_cleanup, + sizeof(AES_KEY), + NULL, + NULL, + NULL, + NULL + }; + return &aes_256_cbc; +} |