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// SPDX-License-Identifier: BSD-2-Clause
/*
* Copyright (c) 2014-2019, Linaro Limited
*/
#include <crypto/crypto_accel.h>
#include <crypto/crypto.h>
#include <kernel/panic.h>
#include <tee_api_defines.h>
#include <tee_api_types.h>
#include <tomcrypt_private.h>
#define AES_ENC_KEY_LEN (sizeof(ulong32) * 60)
TEE_Result crypto_aes_expand_enc_key(const void *key, size_t key_len,
void *enc_key, size_t enc_keylen,
unsigned int *rounds)
{
#ifdef _CFG_CORE_LTC_AES_ACCEL
return crypto_accel_aes_expand_keys(key, key_len, enc_key, NULL,
enc_keylen, rounds);
#else
symmetric_key skey;
if (enc_keylen < AES_ENC_KEY_LEN)
return TEE_ERROR_BAD_PARAMETERS;
if (aes_setup(key, key_len, 0, &skey))
return TEE_ERROR_BAD_PARAMETERS;
memcpy(enc_key, skey.rijndael.eK, AES_ENC_KEY_LEN);
*rounds = skey.rijndael.Nr;
#endif
return TEE_SUCCESS;
}
void crypto_aes_enc_block(const void *enc_key, size_t enc_keylen __maybe_unused,
unsigned int rounds, const void *src, void *dst)
{
#ifdef _CFG_CORE_LTC_AES_ACCEL
crypto_accel_aes_ecb_enc(dst, src, enc_key, rounds, 1);
#else
symmetric_key skey = { };
assert(enc_keylen >= AES_ENC_KEY_LEN);
skey.rijndael.eK = LTC_ALIGN_BUF(skey.rijndael.K, 16);
memcpy(skey.rijndael.eK, enc_key, AES_ENC_KEY_LEN);
skey.rijndael.Nr = rounds;
if (aes_ecb_encrypt(src, dst, &skey))
panic();
#endif
}
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