| // 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 <mbedtls/md.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <tee_api_types.h> |
| #include <utee_defines.h> |
| #include <util.h> |
| |
| struct mbed_hmac_ctx { |
| struct crypto_mac_ctx mac_ctx; |
| mbedtls_md_context_t md_ctx; |
| }; |
| |
| static const struct crypto_mac_ops mbed_hmac_ops; |
| |
| static struct mbed_hmac_ctx *to_hmac_ctx(struct crypto_mac_ctx *ctx) |
| { |
| assert(ctx && ctx->ops == &mbed_hmac_ops); |
| |
| return container_of(ctx, struct mbed_hmac_ctx, mac_ctx); |
| } |
| |
| static TEE_Result mbed_hmac_init(struct crypto_mac_ctx *ctx, |
| const uint8_t *key, size_t len) |
| { |
| if (mbedtls_md_hmac_starts(&to_hmac_ctx(ctx)->md_ctx, key, len)) |
| return TEE_ERROR_BAD_STATE; |
| |
| return TEE_SUCCESS; |
| } |
| |
| static TEE_Result mbed_hmac_update(struct crypto_mac_ctx *ctx, |
| const uint8_t *data, size_t len) |
| { |
| if (mbedtls_md_hmac_update(&to_hmac_ctx(ctx)->md_ctx, data, len)) |
| return TEE_ERROR_BAD_STATE; |
| |
| return TEE_SUCCESS; |
| } |
| |
| static TEE_Result mbed_hmac_final(struct crypto_mac_ctx *ctx, uint8_t *digest, |
| size_t len) |
| { |
| struct mbed_hmac_ctx *c = to_hmac_ctx(ctx); |
| size_t hmac_size = mbedtls_md_get_size(c->md_ctx.md_info); |
| uint8_t block_digest[TEE_MAX_HASH_SIZE] = { 0 }; |
| uint8_t *tmp_digest = NULL; |
| |
| if (len == 0) |
| return TEE_ERROR_BAD_PARAMETERS; |
| |
| if (hmac_size > len) { |
| if (hmac_size > sizeof(block_digest)) |
| return TEE_ERROR_BAD_STATE; |
| tmp_digest = block_digest; /* use a tempory buffer */ |
| } else { |
| tmp_digest = digest; |
| } |
| |
| if (mbedtls_md_hmac_finish(&c->md_ctx, tmp_digest)) |
| return TEE_ERROR_BAD_STATE; |
| |
| if (hmac_size > len) |
| memcpy(digest, tmp_digest, len); |
| |
| return TEE_SUCCESS; |
| } |
| |
| static void mbed_hmac_free_ctx(struct crypto_mac_ctx *ctx) |
| { |
| struct mbed_hmac_ctx *c = to_hmac_ctx(ctx); |
| |
| mbedtls_md_free(&c->md_ctx); |
| free(c); |
| } |
| |
| static void mbed_hmac_copy_state(struct crypto_mac_ctx *dst_ctx, |
| struct crypto_mac_ctx *src_ctx) |
| { |
| struct mbed_hmac_ctx *src = to_hmac_ctx(src_ctx); |
| struct mbed_hmac_ctx *dst = to_hmac_ctx(dst_ctx); |
| |
| if (mbedtls_md_clone(&dst->md_ctx, &src->md_ctx)) |
| panic(); |
| } |
| |
| static const struct crypto_mac_ops mbed_hmac_ops = { |
| .init = mbed_hmac_init, |
| .update = mbed_hmac_update, |
| .final = mbed_hmac_final, |
| .free_ctx = mbed_hmac_free_ctx, |
| .copy_state = mbed_hmac_copy_state, |
| }; |
| |
| static TEE_Result mbed_hmac_alloc_ctx(struct crypto_mac_ctx **ctx_ret, |
| mbedtls_md_type_t md_type) |
| { |
| int mbed_res = 0; |
| struct mbed_hmac_ctx *c = NULL; |
| const mbedtls_md_info_t *md_info = mbedtls_md_info_from_type(md_type); |
| |
| if (!md_info) |
| return TEE_ERROR_NOT_SUPPORTED; |
| |
| c = calloc(1, sizeof(*c)); |
| if (!c) |
| return TEE_ERROR_OUT_OF_MEMORY; |
| |
| c->mac_ctx.ops = &mbed_hmac_ops; |
| mbed_res = mbedtls_md_setup(&c->md_ctx, md_info, 1); |
| if (mbed_res) { |
| free(c); |
| if (mbed_res == MBEDTLS_ERR_MD_ALLOC_FAILED) |
| return TEE_ERROR_OUT_OF_MEMORY; |
| return TEE_ERROR_NOT_SUPPORTED; |
| } |
| |
| *ctx_ret = &c->mac_ctx; |
| |
| return TEE_SUCCESS; |
| } |
| |
| #if defined(CFG_CRYPTO_MD5) |
| TEE_Result crypto_hmac_md5_alloc_ctx(struct crypto_mac_ctx **ctx) |
| { |
| return mbed_hmac_alloc_ctx(ctx, MBEDTLS_MD_MD5); |
| } |
| #endif |
| |
| #if defined(CFG_CRYPTO_SHA1) |
| TEE_Result crypto_hmac_sha1_alloc_ctx(struct crypto_mac_ctx **ctx) |
| { |
| return mbed_hmac_alloc_ctx(ctx, MBEDTLS_MD_SHA1); |
| } |
| #endif |
| |
| #if defined(CFG_CRYPTO_SHA224) |
| TEE_Result crypto_hmac_sha224_alloc_ctx(struct crypto_mac_ctx **ctx) |
| { |
| return mbed_hmac_alloc_ctx(ctx, MBEDTLS_MD_SHA224); |
| } |
| #endif |
| |
| #if defined(CFG_CRYPTO_SHA256) |
| TEE_Result crypto_hmac_sha256_alloc_ctx(struct crypto_mac_ctx **ctx) |
| { |
| return mbed_hmac_alloc_ctx(ctx, MBEDTLS_MD_SHA256); |
| } |
| #endif |
| |
| #if defined(CFG_CRYPTO_SHA384) |
| TEE_Result crypto_hmac_sha384_alloc_ctx(struct crypto_mac_ctx **ctx) |
| { |
| return mbed_hmac_alloc_ctx(ctx, MBEDTLS_MD_SHA384); |
| } |
| #endif |
| |
| #if defined(CFG_CRYPTO_SHA512) |
| TEE_Result crypto_hmac_sha512_alloc_ctx(struct crypto_mac_ctx **ctx) |
| { |
| return mbed_hmac_alloc_ctx(ctx, MBEDTLS_MD_SHA512); |
| } |
| #endif |