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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 <string.h>
#include <tee_api_types.h>
#include <tomcrypt_private.h>
#include <utee_defines.h>
#include <util.h>
struct ltc_hmac_ctx {
struct crypto_mac_ctx ctx;
int hash_idx;
hmac_state state;
};
static const struct crypto_mac_ops ltc_hmac_ops;
static struct ltc_hmac_ctx *to_hmac_ctx(struct crypto_mac_ctx *ctx)
{
assert(ctx && ctx->ops == <c_hmac_ops);
return container_of(ctx, struct ltc_hmac_ctx, ctx);
}
static TEE_Result ltc_hmac_init(struct crypto_mac_ctx *ctx, const uint8_t *key,
size_t len)
{
struct ltc_hmac_ctx *hc = to_hmac_ctx(ctx);
if (hmac_init(&hc->state, hc->hash_idx, key, len) == CRYPT_OK)
return TEE_SUCCESS;
else
return TEE_ERROR_BAD_STATE;
}
static TEE_Result ltc_hmac_update(struct crypto_mac_ctx *ctx,
const uint8_t *data, size_t len)
{
if (hmac_process(&to_hmac_ctx(ctx)->state, data, len) == CRYPT_OK)
return TEE_SUCCESS;
else
return TEE_ERROR_BAD_STATE;
}
static TEE_Result ltc_hmac_final(struct crypto_mac_ctx *ctx, uint8_t *digest,
size_t len)
{
unsigned long l = len;
if (hmac_done(&to_hmac_ctx(ctx)->state, digest, &l) == CRYPT_OK)
return TEE_SUCCESS;
else
return TEE_ERROR_BAD_STATE;
}
static void ltc_hmac_free_ctx(struct crypto_mac_ctx *ctx)
{
free(to_hmac_ctx(ctx));
}
static void ltc_hmac_copy_state(struct crypto_mac_ctx *dst_ctx,
struct crypto_mac_ctx *src_ctx)
{
struct ltc_hmac_ctx *src = to_hmac_ctx(src_ctx);
struct ltc_hmac_ctx *dst = to_hmac_ctx(dst_ctx);
assert(src->hash_idx == dst->hash_idx);
dst->state = src->state;
}
static const struct crypto_mac_ops ltc_hmac_ops = {
.init = ltc_hmac_init,
.update = ltc_hmac_update,
.final = ltc_hmac_final,
.free_ctx = ltc_hmac_free_ctx,
.copy_state = ltc_hmac_copy_state,
};
static TEE_Result ltc_hmac_alloc_ctx(struct crypto_mac_ctx **ctx_ret,
int hash_idx)
{
struct ltc_hmac_ctx *ctx = NULL;
if (hash_idx < 0)
return TEE_ERROR_NOT_SUPPORTED;
ctx = calloc(1, sizeof(*ctx));
if (!ctx)
return TEE_ERROR_OUT_OF_MEMORY;
ctx->ctx.ops = <c_hmac_ops;
ctx->hash_idx = hash_idx;
*ctx_ret = &ctx->ctx;
return TEE_SUCCESS;
}
#if defined(_CFG_CORE_LTC_MD5)
TEE_Result crypto_hmac_md5_alloc_ctx(struct crypto_mac_ctx **ctx)
{
return ltc_hmac_alloc_ctx(ctx, find_hash("md5"));
}
#endif
#if defined(_CFG_CORE_LTC_SHA1)
TEE_Result crypto_hmac_sha1_alloc_ctx(struct crypto_mac_ctx **ctx)
{
return ltc_hmac_alloc_ctx(ctx, find_hash("sha1"));
}
#endif
#if defined(_CFG_CORE_LTC_SHA224)
TEE_Result crypto_hmac_sha224_alloc_ctx(struct crypto_mac_ctx **ctx)
{
return ltc_hmac_alloc_ctx(ctx, find_hash("sha224"));
}
#endif
#if defined(_CFG_CORE_LTC_SHA256)
TEE_Result crypto_hmac_sha256_alloc_ctx(struct crypto_mac_ctx **ctx)
{
return ltc_hmac_alloc_ctx(ctx, find_hash("sha256"));
}
#endif
#if defined(_CFG_CORE_LTC_SHA384)
TEE_Result crypto_hmac_sha384_alloc_ctx(struct crypto_mac_ctx **ctx)
{
return ltc_hmac_alloc_ctx(ctx, find_hash("sha384"));
}
#endif
#if defined(_CFG_CORE_LTC_SHA512)
TEE_Result crypto_hmac_sha512_alloc_ctx(struct crypto_mac_ctx **ctx)
{
return ltc_hmac_alloc_ctx(ctx, find_hash("sha512"));
}
#endif
#if defined(_CFG_CORE_LTC_SHA3_224)
TEE_Result crypto_hmac_sha3_224_alloc_ctx(struct crypto_mac_ctx **ctx)
{
return ltc_hmac_alloc_ctx(ctx, find_hash("sha3-224"));
}
#endif
#if defined(_CFG_CORE_LTC_SHA3_256)
TEE_Result crypto_hmac_sha3_256_alloc_ctx(struct crypto_mac_ctx **ctx)
{
return ltc_hmac_alloc_ctx(ctx, find_hash("sha3-256"));
}
#endif
#if defined(_CFG_CORE_LTC_SHA3_384)
TEE_Result crypto_hmac_sha3_384_alloc_ctx(struct crypto_mac_ctx **ctx)
{
return ltc_hmac_alloc_ctx(ctx, find_hash("sha3-384"));
}
#endif
#if defined(_CFG_CORE_LTC_SHA3_512)
TEE_Result crypto_hmac_sha3_512_alloc_ctx(struct crypto_mac_ctx **ctx)
{
return ltc_hmac_alloc_ctx(ctx, find_hash("sha3-512"));
}
#endif
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