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// SPDX-License-Identifier: BSD-2-Clause
/*
* Copyright (c) 2014-2019, Linaro Limited
*/
#include <assert.h>
#include <crypto/crypto.h>
#include <crypto/crypto_impl.h>
#include <stdlib.h>
#include <tee_api_types.h>
#include <tomcrypt_private.h>
#include <util.h>
#include "des2_key.h"
struct ltc_ecb_ctx {
struct crypto_cipher_ctx ctx;
int cipher_idx;
bool des3;
int (*update)(const unsigned char *src, unsigned char *dst,
unsigned long len, symmetric_ECB *ecb);
symmetric_ECB state;
};
static const struct crypto_cipher_ops ltc_ecb_ops;
static struct ltc_ecb_ctx *to_ecb_ctx(struct crypto_cipher_ctx *ctx)
{
assert(ctx && ctx->ops == &ltc_ecb_ops);
return container_of(ctx, struct ltc_ecb_ctx, ctx);
}
static TEE_Result ltc_ecb_init(struct crypto_cipher_ctx *ctx,
TEE_OperationMode mode, const uint8_t *key1,
size_t key1_len, const uint8_t *key2 __unused,
size_t key2_len __unused,
const uint8_t *iv __unused,
size_t iv_len __unused)
{
struct ltc_ecb_ctx *c = to_ecb_ctx(ctx);
uint8_t tmp[24] = { 0 };
const uint8_t *k = key1;
size_t kl = key1_len;
if (mode == TEE_MODE_ENCRYPT)
c->update = ecb_encrypt;
else
c->update = ecb_decrypt;
if (c->des3)
get_des2_key(&k, &kl, tmp);
if (ecb_start(c->cipher_idx, k, kl, 0, &c->state) == CRYPT_OK)
return TEE_SUCCESS;
else
return TEE_ERROR_BAD_STATE;
}
static TEE_Result ltc_ecb_update(struct crypto_cipher_ctx *ctx,
bool last_block __unused,
const uint8_t *data, size_t len, uint8_t *dst)
{
struct ltc_ecb_ctx *c = to_ecb_ctx(ctx);
if (c->update && c->update(data, dst, len, &c->state) == CRYPT_OK)
return TEE_SUCCESS;
else
return TEE_ERROR_BAD_STATE;
}
static void ltc_ecb_final(struct crypto_cipher_ctx *ctx)
{
ecb_done(&to_ecb_ctx(ctx)->state);
}
static void ltc_ecb_free_ctx(struct crypto_cipher_ctx *ctx)
{
free(to_ecb_ctx(ctx));
}
static void ltc_ecb_copy_state(struct crypto_cipher_ctx *dst_ctx,
struct crypto_cipher_ctx *src_ctx)
{
struct ltc_ecb_ctx *src = to_ecb_ctx(src_ctx);
struct ltc_ecb_ctx *dst = to_ecb_ctx(dst_ctx);
assert(src->cipher_idx == dst->cipher_idx);
dst->update = src->update;
dst->state = src->state;
}
static const struct crypto_cipher_ops ltc_ecb_ops = {
.init = ltc_ecb_init,
.update = ltc_ecb_update,
.final = ltc_ecb_final,
.free_ctx = ltc_ecb_free_ctx,
.copy_state = ltc_ecb_copy_state,
};
static TEE_Result ltc_ecb_alloc_ctx(struct crypto_cipher_ctx **ctx_ret,
int cipher_idx, bool des3)
{
struct ltc_ecb_ctx *c = NULL;
if (cipher_idx < 0)
return TEE_ERROR_NOT_SUPPORTED;
c = calloc(1, sizeof(*c));
if (!c)
return TEE_ERROR_OUT_OF_MEMORY;
c->ctx.ops = &ltc_ecb_ops;
c->cipher_idx = cipher_idx;
c->des3 = des3;
*ctx_ret = &c->ctx;
return TEE_SUCCESS;
}
#if defined(_CFG_CORE_LTC_AES)
TEE_Result crypto_aes_ecb_alloc_ctx(struct crypto_cipher_ctx **ctx)
{
return ltc_ecb_alloc_ctx(ctx, find_cipher("aes"), false);
}
#endif
#if defined(_CFG_CORE_LTC_DES)
TEE_Result crypto_des_ecb_alloc_ctx(struct crypto_cipher_ctx **ctx)
{
return ltc_ecb_alloc_ctx(ctx, find_cipher("des"), false);
}
TEE_Result crypto_des3_ecb_alloc_ctx(struct crypto_cipher_ctx **ctx)
{
return ltc_ecb_alloc_ctx(ctx, find_cipher("3des"), true);
}
#endif