| // 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.h> |
| #include <crypto/crypto_impl.h> |
| #include <kernel/panic.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <string_ext.h> |
| #include <tee_api_types.h> |
| #include <utee_defines.h> |
| #include <util.h> |
| |
| #include "sm3.h" |
| |
| struct sm3_hmac_ctx { |
| struct crypto_mac_ctx mac_ctx; |
| struct sm3_context sm3_ctx; |
| }; |
| |
| static const struct crypto_mac_ops sm3_hmac_ops; |
| |
| static struct sm3_hmac_ctx *to_hmac_ctx(struct crypto_mac_ctx *ctx) |
| { |
| assert(ctx && ctx->ops == &sm3_hmac_ops); |
| |
| return container_of(ctx, struct sm3_hmac_ctx, mac_ctx); |
| } |
| |
| static TEE_Result op_sm3_hmac_init(struct crypto_mac_ctx *ctx, |
| const uint8_t *key, size_t len) |
| { |
| sm3_hmac_init(&to_hmac_ctx(ctx)->sm3_ctx, key, len); |
| |
| return TEE_SUCCESS; |
| } |
| |
| static TEE_Result op_sm3_hmac_update(struct crypto_mac_ctx *ctx, |
| const uint8_t *data, size_t len) |
| { |
| sm3_hmac_update(&to_hmac_ctx(ctx)->sm3_ctx, data, len); |
| |
| return TEE_SUCCESS; |
| } |
| |
| static TEE_Result op_sm3_hmac_final(struct crypto_mac_ctx *ctx, uint8_t *digest, |
| size_t len) |
| { |
| struct sm3_hmac_ctx *c = to_hmac_ctx(ctx); |
| size_t hmac_size = TEE_SM3_HASH_SIZE; |
| uint8_t block_digest[TEE_SM3_HASH_SIZE] = { 0 }; |
| uint8_t *tmp_digest = NULL; |
| |
| if (len == 0) |
| return TEE_ERROR_BAD_PARAMETERS; |
| |
| if (hmac_size > len) |
| tmp_digest = block_digest; /* use a tempory buffer */ |
| else |
| tmp_digest = digest; |
| |
| sm3_hmac_final(&c->sm3_ctx, tmp_digest); |
| |
| if (hmac_size > len) |
| memcpy(digest, tmp_digest, len); |
| |
| return TEE_SUCCESS; |
| } |
| |
| static void op_sm3_hmac_free_ctx(struct crypto_mac_ctx *ctx) |
| { |
| struct sm3_hmac_ctx *c = to_hmac_ctx(ctx); |
| |
| memzero_explicit(&c->sm3_ctx, sizeof(c->sm3_ctx)); |
| free(c); |
| } |
| |
| static void op_sm3_hmac_copy_state(struct crypto_mac_ctx *dst_ctx, |
| struct crypto_mac_ctx *src_ctx) |
| { |
| struct sm3_hmac_ctx *src = to_hmac_ctx(src_ctx); |
| struct sm3_hmac_ctx *dst = to_hmac_ctx(dst_ctx); |
| |
| dst->sm3_ctx = src->sm3_ctx; |
| } |
| |
| static const struct crypto_mac_ops sm3_hmac_ops = { |
| .init = op_sm3_hmac_init, |
| .update = op_sm3_hmac_update, |
| .final = op_sm3_hmac_final, |
| .free_ctx = op_sm3_hmac_free_ctx, |
| .copy_state = op_sm3_hmac_copy_state, |
| }; |
| |
| TEE_Result crypto_hmac_sm3_alloc_ctx(struct crypto_mac_ctx **ctx) |
| { |
| struct sm3_hmac_ctx *c = NULL; |
| |
| c = calloc(1, sizeof(*c)); |
| if (!c) |
| return TEE_ERROR_OUT_OF_MEMORY; |
| |
| c->mac_ctx.ops = &sm3_hmac_ops; |
| |
| *ctx = &c->mac_ctx; |
| |
| return TEE_SUCCESS; |
| } |