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/*
* Copyright 2001-2020 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
/*-
* AES-NI support for AES modes ecb, cbc, ofb, cfb, ctr.
* This file is included by cipher_aes_hw.c
*/
#define cipher_hw_aesni_ofb128 ossl_cipher_hw_generic_ofb128
#define cipher_hw_aesni_cfb128 ossl_cipher_hw_generic_cfb128
#define cipher_hw_aesni_cfb8 ossl_cipher_hw_generic_cfb8
#define cipher_hw_aesni_cfb1 ossl_cipher_hw_generic_cfb1
#define cipher_hw_aesni_ctr ossl_cipher_hw_generic_ctr
static int cipher_hw_aesni_initkey(PROV_CIPHER_CTX *dat,
const unsigned char *key, size_t keylen)
{
int ret;
PROV_AES_CTX *adat = (PROV_AES_CTX *)dat;
AES_KEY *ks = &adat->ks.ks;
dat->ks = ks;
if ((dat->mode == EVP_CIPH_ECB_MODE || dat->mode == EVP_CIPH_CBC_MODE)
&& !dat->enc) {
ret = aesni_set_decrypt_key(key, keylen * 8, ks);
dat->block = (block128_f) aesni_decrypt;
dat->stream.cbc = dat->mode == EVP_CIPH_CBC_MODE ?
(cbc128_f) aesni_cbc_encrypt : NULL;
} else {
ret = aesni_set_encrypt_key(key, keylen * 8, ks);
dat->block = (block128_f) aesni_encrypt;
if (dat->mode == EVP_CIPH_CBC_MODE)
dat->stream.cbc = (cbc128_f) aesni_cbc_encrypt;
else if (dat->mode == EVP_CIPH_CTR_MODE)
dat->stream.ctr = (ctr128_f) aesni_ctr32_encrypt_blocks;
else
dat->stream.cbc = NULL;
}
if (ret < 0) {
ERR_raise(ERR_LIB_PROV, PROV_R_AES_KEY_SETUP_FAILED);
return 0;
}
return 1;
}
static int cipher_hw_aesni_cbc(PROV_CIPHER_CTX *ctx, unsigned char *out,
const unsigned char *in, size_t len)
{
const AES_KEY *ks = ctx->ks;
aesni_cbc_encrypt(in, out, len, ks, ctx->iv, ctx->enc);
return 1;
}
static int cipher_hw_aesni_ecb(PROV_CIPHER_CTX *ctx, unsigned char *out,
const unsigned char *in, size_t len)
{
if (len < ctx->blocksize)
return 1;
aesni_ecb_encrypt(in, out, len, ctx->ks, ctx->enc);
return 1;
}
#define PROV_CIPHER_HW_declare(mode) \
static const PROV_CIPHER_HW aesni_##mode = { \
cipher_hw_aesni_initkey, \
cipher_hw_aesni_##mode, \
cipher_hw_aes_copyctx \
};
#define PROV_CIPHER_HW_select(mode) \
if (AESNI_CAPABLE) \
return &aesni_##mode;
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