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// SPDX-License-Identifier: BSD-2-Clause
/*
* Copyright (C) 2018, ARM Limited
* Copyright (C) 2019, Linaro Limited
*/
#include <assert.h>
#include <compiler.h>
#include <crypto/crypto_accel.h>
#include <crypto/crypto.h>
#include <kernel/panic.h>
#include <mbedtls/aes.h>
#include <mbedtls/platform_util.h>
#include <string.h>
#if defined(MBEDTLS_AES_ALT)
void mbedtls_aes_init(mbedtls_aes_context *ctx)
{
assert(ctx);
memset(ctx, 0, sizeof(*ctx));
}
void mbedtls_aes_free( mbedtls_aes_context *ctx )
{
if (ctx)
mbedtls_platform_zeroize(ctx, sizeof(*ctx));
}
int mbedtls_aes_setkey_enc(mbedtls_aes_context *ctx, const unsigned char *key,
unsigned int keybits)
{
assert(ctx && key);
if (keybits != 128 && keybits != 192 && keybits != 256)
return MBEDTLS_ERR_AES_INVALID_KEY_LENGTH;
if (crypto_accel_aes_expand_keys(key, keybits / 8, ctx->key, NULL,
sizeof(ctx->key), &ctx->round_count))
return MBEDTLS_ERR_AES_BAD_INPUT_DATA;
return 0;
}
int mbedtls_aes_setkey_dec(mbedtls_aes_context *ctx, const unsigned char *key,
unsigned int keybits)
{
uint32_t enc_key[sizeof(ctx->key)] = { 0 };
assert(ctx && key);
if (keybits != 128 && keybits != 192 && keybits != 256)
return MBEDTLS_ERR_AES_INVALID_KEY_LENGTH;
if (crypto_accel_aes_expand_keys(key, keybits / 8, enc_key, ctx->key,
sizeof(ctx->key), &ctx->round_count))
return MBEDTLS_ERR_AES_BAD_INPUT_DATA;
return 0;
}
#endif /*MBEDTLS_AES_ALT*/
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