e_chacha20poly1305.c | Explore in Territory

/* Copyright (c) 2014, 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 <string.h>

#include <openssl/chacha.h>
#include <openssl/cipher.h>
#include <openssl/err.h>
#include <openssl/mem.h>
#include <openssl/poly1305.h>

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

struct aead_chacha20_poly1305_ctx { … };

static_assert;
static_assert;

static int aead_chacha20_poly1305_init(EVP_AEAD_CTX *ctx, const uint8_t *key,
                                       size_t key_len, size_t tag_len) { … }

static void aead_chacha20_poly1305_cleanup(EVP_AEAD_CTX *ctx) { … }

static void poly1305_update_length(poly1305_state *poly1305, size_t data_len) { … }

// calc_tag fills |tag| with the authentication tag for the given inputs.
static void calc_tag(uint8_t tag[POLY1305_TAG_LEN], const uint8_t *key,
                     const uint8_t nonce[12], const uint8_t *ad, size_t ad_len,
                     const uint8_t *ciphertext, size_t ciphertext_len,
                     const uint8_t *ciphertext_extra,
                     size_t ciphertext_extra_len) { … }

static int chacha20_poly1305_seal_scatter(
    const uint8_t *key, 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, size_t tag_len) { … }

static int aead_chacha20_poly1305_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_xchacha20_poly1305_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 chacha20_poly1305_open_gather(
    const uint8_t *key, 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, size_t tag_len) { … }

static int aead_chacha20_poly1305_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 int aead_xchacha20_poly1305_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_chacha20_poly1305 = …;

static const EVP_AEAD aead_xchacha20_poly1305 = …;

const EVP_AEAD *EVP_aead_chacha20_poly1305(void) { … }

const EVP_AEAD *EVP_aead_xchacha20_poly1305(void) { … }
chromium/third_party/boringssl/src/crypto/cipher_extra/e_chacha20poly1305.c
