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/* ====================================================================
* Copyright (c) 2002-2006 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
* openssl-core@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.
* ==================================================================== */
#include <openssl/aes.h>
#include <assert.h>
#include "internal.h"
#include "../modes/internal.h"
// Be aware that different sets of AES functions use incompatible key
// representations, varying in format of the key schedule, the |AES_KEY.rounds|
// value, or both. Therefore they cannot mix. Also, on AArch64, the plain-C
// code, above, is incompatible with the |aes_hw_*| functions.
void AES_encrypt(const uint8_t *in, uint8_t *out, const AES_KEY *key) {
if (hwaes_capable()) {
aes_hw_encrypt(in, out, key);
} else if (vpaes_capable()) {
vpaes_encrypt(in, out, key);
} else {
aes_nohw_encrypt(in, out, key);
}
}
void AES_decrypt(const uint8_t *in, uint8_t *out, const AES_KEY *key) {
if (hwaes_capable()) {
aes_hw_decrypt(in, out, key);
} else if (vpaes_capable()) {
vpaes_decrypt(in, out, key);
} else {
aes_nohw_decrypt(in, out, key);
}
}
int AES_set_encrypt_key(const uint8_t *key, unsigned bits, AES_KEY *aeskey) {
if (bits != 128 && bits != 192 && bits != 256) {
return -2;
}
if (hwaes_capable()) {
return aes_hw_set_encrypt_key(key, bits, aeskey);
} else if (vpaes_capable()) {
return vpaes_set_encrypt_key(key, bits, aeskey);
} else {
return aes_nohw_set_encrypt_key(key, bits, aeskey);
}
}
int AES_set_decrypt_key(const uint8_t *key, unsigned bits, AES_KEY *aeskey) {
if (bits != 128 && bits != 192 && bits != 256) {
return -2;
}
if (hwaes_capable()) {
return aes_hw_set_decrypt_key(key, bits, aeskey);
} else if (vpaes_capable()) {
return vpaes_set_decrypt_key(key, bits, aeskey);
} else {
return aes_nohw_set_decrypt_key(key, bits, aeskey);
}
}
#if defined(HWAES) && (defined(OPENSSL_X86) || defined(OPENSSL_X86_64))
// On x86 and x86_64, |aes_hw_set_decrypt_key|, we implement
// |aes_hw_encrypt_key_to_decrypt_key| in assembly and rely on C code to combine
// the operations.
int aes_hw_set_decrypt_key(const uint8_t *user_key, int bits, AES_KEY *key) {
int ret = aes_hw_set_encrypt_key(user_key, bits, key);
if (ret == 0) {
aes_hw_encrypt_key_to_decrypt_key(key);
}
return ret;
}
int aes_hw_set_encrypt_key(const uint8_t *user_key, int bits, AES_KEY *key) {
if (aes_hw_set_encrypt_key_alt_preferred()) {
return aes_hw_set_encrypt_key_alt(user_key, bits, key);
} else {
return aes_hw_set_encrypt_key_base(user_key, bits, key);
}
}
#endif
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