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sys/boot/boot_crypto/boot_crypto.c
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| /*- | |||||
| * Copyright (c) 2016 Eric McCorkle | |||||
| * 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 AUTHOR 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 AUTHOR 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. | |||||
| * | |||||
| * $FreeBSD$ | |||||
| */ | |||||
| #include <stddef.h> | |||||
| #include <string.h> | |||||
| #include "boot_crypto.h" | |||||
| #include "boot_crypto_aes.h" | |||||
| int decrypt_symmetric(const symmetric_alg_t *alg, u_char *data, size_t datalen, | |||||
| const u_char *key, size_t keylen, u_char *iv) | |||||
| { | |||||
| symmetric_alg_ctx_t ctx; | |||||
| int res; | |||||
| res = alg->ctxinit(&ctx, 0, key, keylen, iv); | |||||
| if(0 != res) { | |||||
| return (res); | |||||
| } else { | |||||
| return alg->decrypt(&ctx, data, datalen); | |||||
| } | |||||
| } | |||||
| int encrypt_symmetric(const symmetric_alg_t *alg, u_char *data, size_t datalen, | |||||
| const u_char *key, size_t keylen, u_char *iv) | |||||
| { | |||||
| symmetric_alg_ctx_t ctx; | |||||
| int res; | |||||
| res = alg->ctxinit(&ctx, 1, key, keylen, iv); | |||||
| if(0 != res) { | |||||
| return (res); | |||||
| } else { | |||||
| return alg->encrypt(&ctx, data, datalen); | |||||
| } | |||||
| } | |||||
| const symmetric_alg_t* get_symmetric_alg(int alg) { | |||||
| switch(alg) { | |||||
| case CRYPTO_AES_XTS: return &alg_aes_xts; | |||||
| case CRYPTO_AES_CBC: return &alg_aes_cbc; | |||||
| default: return NULL; | |||||
| } | |||||
| } | |||||