chromium/third_party/boringssl/src/crypto/cipher_extra/e_aesctrhmac.c

/* Copyright (c) 2017, Google Inc.
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */

#include <openssl/aead.h>

#include <assert.h>

#include <openssl/cipher.h>
#include <openssl/crypto.h>
#include <openssl/err.h>
#include <openssl/sha.h>

#include "../fipsmodule/cipher/internal.h"


#define EVP_AEAD_AES_CTR_HMAC_SHA256_TAG_LEN …
#define EVP_AEAD_AES_CTR_HMAC_SHA256_NONCE_LEN …

struct aead_aes_ctr_hmac_sha256_ctx { … };

static_assert;
static_assert;

static void hmac_init(SHA256_CTX *out_inner, SHA256_CTX *out_outer,
                      const uint8_t hmac_key[32]) { … }

static int aead_aes_ctr_hmac_sha256_init(EVP_AEAD_CTX *ctx, const uint8_t *key,
                                         size_t key_len, size_t tag_len) { … }

static void aead_aes_ctr_hmac_sha256_cleanup(EVP_AEAD_CTX *ctx) { … }

static void hmac_update_uint64(SHA256_CTX *sha256, uint64_t value) { … }

static void hmac_calculate(uint8_t out[SHA256_DIGEST_LENGTH],
                           const SHA256_CTX *inner_init_state,
                           const SHA256_CTX *outer_init_state,
                           const uint8_t *ad, size_t ad_len,
                           const uint8_t *nonce, const uint8_t *ciphertext,
                           size_t ciphertext_len) { … }

static void aead_aes_ctr_hmac_sha256_crypt(
    const struct aead_aes_ctr_hmac_sha256_ctx *aes_ctx, uint8_t *out,
    const uint8_t *in, size_t len, const uint8_t *nonce) { … }

static int aead_aes_ctr_hmac_sha256_seal_scatter(
    const EVP_AEAD_CTX *ctx, uint8_t *out, uint8_t *out_tag,
    size_t *out_tag_len, size_t max_out_tag_len, const uint8_t *nonce,
    size_t nonce_len, const uint8_t *in, size_t in_len, const uint8_t *extra_in,
    size_t extra_in_len, const uint8_t *ad, size_t ad_len) { … }

static int aead_aes_ctr_hmac_sha256_open_gather(
    const EVP_AEAD_CTX *ctx, uint8_t *out, const uint8_t *nonce,
    size_t nonce_len, const uint8_t *in, size_t in_len, const uint8_t *in_tag,
    size_t in_tag_len, const uint8_t *ad, size_t ad_len) { … }

static const EVP_AEAD aead_aes_128_ctr_hmac_sha256 = …;

static const EVP_AEAD aead_aes_256_ctr_hmac_sha256 = …;

const EVP_AEAD *EVP_aead_aes_128_ctr_hmac_sha256(void) { … }

const EVP_AEAD *EVP_aead_aes_256_ctr_hmac_sha256(void) { … }