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/* $OpenBSD: aes_amd64.c,v 1.5 2025/07/22 09:13:49 jsing Exp $ */
/*
* Copyright (c) 2025 Joel Sing <jsing@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <openssl/aes.h>
#include "crypto_arch.h"
#include "modes_local.h"
int aes_set_encrypt_key_generic(const unsigned char *userKey, const int bits,
AES_KEY *key);
int aes_set_decrypt_key_generic(const unsigned char *userKey, const int bits,
AES_KEY *key);
void aes_encrypt_generic(const unsigned char *in, unsigned char *out,
const AES_KEY *key);
void aes_decrypt_generic(const unsigned char *in, unsigned char *out,
const AES_KEY *key);
void aes_cbc_encrypt_generic(const unsigned char *in, unsigned char *out,
size_t len, const AES_KEY *key, unsigned char *ivec, const int enc);
void aes_ccm64_encrypt_generic(const unsigned char *in, unsigned char *out,
size_t blocks, const void *key, const unsigned char ivec[16],
unsigned char cmac[16], int encrypt);
void aes_ctr32_encrypt_generic(const unsigned char *in, unsigned char *out,
size_t blocks, const AES_KEY *key, const unsigned char ivec[AES_BLOCK_SIZE]);
void aes_xts_encrypt_generic(const unsigned char *in, unsigned char *out,
size_t len, const AES_KEY *key1, const AES_KEY *key2,
const unsigned char iv[16], int encrypt);
int aesni_set_encrypt_key(const unsigned char *userKey, int bits,
AES_KEY *key);
int aesni_set_decrypt_key(const unsigned char *userKey, int bits,
AES_KEY *key);
void aesni_encrypt(const unsigned char *in, unsigned char *out,
const AES_KEY *key);
void aesni_decrypt(const unsigned char *in, unsigned char *out,
const AES_KEY *key);
void aesni_cbc_encrypt(const unsigned char *in, unsigned char *out,
size_t len, const AES_KEY *key, unsigned char *ivec, const int enc);
void aesni_ccm64_encrypt_blocks(const unsigned char *in, unsigned char *out,
size_t blocks, const void *key, const unsigned char ivec[16],
unsigned char cmac[16]);
void aesni_ccm64_decrypt_blocks(const unsigned char *in, unsigned char *out,
size_t blocks, const void *key, const unsigned char ivec[16],
unsigned char cmac[16]);
void aesni_ctr32_encrypt_blocks(const unsigned char *in, unsigned char *out,
size_t blocks, const void *key, const unsigned char *ivec);
void aesni_ecb_encrypt(const unsigned char *in, unsigned char *out,
size_t length, const AES_KEY *key, int enc);
void aesni_xts_encrypt(const unsigned char *in, unsigned char *out,
size_t length, const AES_KEY *key1, const AES_KEY *key2,
const unsigned char iv[16]);
void aesni_xts_decrypt(const unsigned char *in, unsigned char *out,
size_t length, const AES_KEY *key1, const AES_KEY *key2,
const unsigned char iv[16]);
int
aes_set_encrypt_key_internal(const unsigned char *userKey, const int bits,
AES_KEY *key)
{
if ((crypto_cpu_caps_amd64 & CRYPTO_CPU_CAPS_AMD64_AES) != 0)
return aesni_set_encrypt_key(userKey, bits, key);
return aes_set_encrypt_key_generic(userKey, bits, key);
}
int
aes_set_decrypt_key_internal(const unsigned char *userKey, const int bits,
AES_KEY *key)
{
if ((crypto_cpu_caps_amd64 & CRYPTO_CPU_CAPS_AMD64_AES) != 0)
return aesni_set_decrypt_key(userKey, bits, key);
return aes_set_decrypt_key_generic(userKey, bits, key);
}
void
aes_encrypt_internal(const unsigned char *in, unsigned char *out,
const AES_KEY *key)
{
if ((crypto_cpu_caps_amd64 & CRYPTO_CPU_CAPS_AMD64_AES) != 0) {
aesni_encrypt(in, out, key);
return;
}
aes_encrypt_generic(in, out, key);
}
void
aes_decrypt_internal(const unsigned char *in, unsigned char *out,
const AES_KEY *key)
{
if ((crypto_cpu_caps_amd64 & CRYPTO_CPU_CAPS_AMD64_AES) != 0) {
aesni_decrypt(in, out, key);
return;
}
aes_decrypt_generic(in, out, key);
}
void
aes_cbc_encrypt_internal(const unsigned char *in, unsigned char *out,
size_t len, const AES_KEY *key, unsigned char *ivec, const int enc)
{
if ((crypto_cpu_caps_amd64 & CRYPTO_CPU_CAPS_AMD64_AES) != 0) {
aesni_cbc_encrypt(in, out, len, key, ivec, enc);
return;
}
aes_cbc_encrypt_generic(in, out, len, key, ivec, enc);
}
void
aes_ccm64_encrypt_internal(const unsigned char *in, unsigned char *out,
size_t blocks, const void *key, const unsigned char ivec[16],
unsigned char cmac[16], int encrypt)
{
if ((crypto_cpu_caps_amd64 & CRYPTO_CPU_CAPS_AMD64_AES) != 0) {
if (encrypt)
aesni_ccm64_encrypt_blocks(in, out, blocks, key, ivec, cmac);
else
aesni_ccm64_decrypt_blocks(in, out, blocks, key, ivec, cmac);
return;
}
aes_ccm64_encrypt_generic(in, out, blocks, key, ivec, cmac, encrypt);
}
void
aes_ctr32_encrypt_internal(const unsigned char *in, unsigned char *out,
size_t blocks, const AES_KEY *key, const unsigned char ivec[AES_BLOCK_SIZE])
{
if ((crypto_cpu_caps_amd64 & CRYPTO_CPU_CAPS_AMD64_AES) != 0) {
aesni_ctr32_encrypt_blocks(in, out, blocks, key, ivec);
return;
}
aes_ctr32_encrypt_generic(in, out, blocks, key, ivec);
}
void
aes_ecb_encrypt_internal(const unsigned char *in, unsigned char *out,
size_t len, const AES_KEY *key, int encrypt)
{
if ((crypto_cpu_caps_amd64 & CRYPTO_CPU_CAPS_AMD64_AES) != 0) {
aesni_ecb_encrypt(in, out, len, key, encrypt);
return;
}
while (len >= AES_BLOCK_SIZE) {
if (encrypt)
aes_encrypt_generic(in, out, key);
else
aes_decrypt_generic(in, out, key);
in += AES_BLOCK_SIZE;
out += AES_BLOCK_SIZE;
len -= AES_BLOCK_SIZE;
}
}
void
aes_xts_encrypt_internal(const unsigned char *in, unsigned char *out,
size_t len, const AES_KEY *key1, const AES_KEY *key2,
const unsigned char iv[16], int encrypt)
{
if ((crypto_cpu_caps_amd64 & CRYPTO_CPU_CAPS_AMD64_AES) != 0) {
if (encrypt)
aesni_xts_encrypt(in, out, len, key1, key2, iv);
else
aesni_xts_decrypt(in, out, len, key1, key2, iv);
return;
}
aes_xts_encrypt_generic(in, out, len, key1, key2, iv, encrypt);
}
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