dsa.c | Explore in Territory

/* Copyright (C) 1995-1998 Eric Young ([email protected])
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young ([email protected]).
 * The implementation was written so as to conform with Netscapes SSL.
 *
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson ([email protected]).
 *
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young ([email protected])"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson ([email protected])"
 *
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 *
 * The DSS routines are based on patches supplied by
 * Steven Schoch <[email protected]>. */

#include <openssl/dsa.h>

#include <string.h>

#include <openssl/bn.h>
#include <openssl/dh.h>
#include <openssl/digest.h>
#include <openssl/engine.h>
#include <openssl/err.h>
#include <openssl/ex_data.h>
#include <openssl/mem.h>
#include <openssl/rand.h>
#include <openssl/sha.h>
#include <openssl/thread.h>

#include "internal.h"
#include "../fipsmodule/bn/internal.h"
#include "../fipsmodule/dh/internal.h"
#include "../internal.h"


// Primality test according to FIPS PUB 186[-1], Appendix 2.1: 50 rounds of
// Miller-Rabin.
#define DSS_prime_checks …

static int dsa_sign_setup(const DSA *dsa, BN_CTX *ctx_in, BIGNUM **out_kinv,
                          BIGNUM **out_r);

static CRYPTO_EX_DATA_CLASS g_ex_data_class = …;

DSA *DSA_new(void) { … }

void DSA_free(DSA *dsa) { … }

int DSA_up_ref(DSA *dsa) { … }

unsigned DSA_bits(const DSA *dsa) { … }

const BIGNUM *DSA_get0_pub_key(const DSA *dsa) { … }

const BIGNUM *DSA_get0_priv_key(const DSA *dsa) { … }

const BIGNUM *DSA_get0_p(const DSA *dsa) { … }

const BIGNUM *DSA_get0_q(const DSA *dsa) { … }

const BIGNUM *DSA_get0_g(const DSA *dsa) { … }

void DSA_get0_key(const DSA *dsa, const BIGNUM **out_pub_key,
                  const BIGNUM **out_priv_key) { … }

void DSA_get0_pqg(const DSA *dsa, const BIGNUM **out_p, const BIGNUM **out_q,
                  const BIGNUM **out_g) { … }

int DSA_set0_key(DSA *dsa, BIGNUM *pub_key, BIGNUM *priv_key) { … }

int DSA_set0_pqg(DSA *dsa, BIGNUM *p, BIGNUM *q, BIGNUM *g) { … }

int DSA_generate_parameters_ex(DSA *dsa, unsigned bits, const uint8_t *seed_in,
                               size_t seed_len, int *out_counter,
                               unsigned long *out_h, BN_GENCB *cb) { … }

DSA *DSAparams_dup(const DSA *dsa) { … }

int DSA_generate_key(DSA *dsa) { … }

DSA_SIG *DSA_SIG_new(void) { … }

void DSA_SIG_free(DSA_SIG *sig) { … }

void DSA_SIG_get0(const DSA_SIG *sig, const BIGNUM **out_r,
                  const BIGNUM **out_s) { … }

int DSA_SIG_set0(DSA_SIG *sig, BIGNUM *r, BIGNUM *s) { … }

// mod_mul_consttime sets |r| to |a| * |b| modulo |mont->N|, treating |a| and
// |b| as secret. This function internally uses Montgomery reduction, but
// neither inputs nor outputs are in Montgomery form.
static int mod_mul_consttime(BIGNUM *r, const BIGNUM *a, const BIGNUM *b,
                             const BN_MONT_CTX *mont, BN_CTX *ctx) { … }

DSA_SIG *DSA_do_sign(const uint8_t *digest, size_t digest_len, const DSA *dsa) { … }

int DSA_do_verify(const uint8_t *digest, size_t digest_len, const DSA_SIG *sig,
                  const DSA *dsa) { … }

int DSA_do_check_signature(int *out_valid, const uint8_t *digest,
                           size_t digest_len, const DSA_SIG *sig,
                           const DSA *dsa) { … }

int DSA_sign(int type, const uint8_t *digest, size_t digest_len,
             uint8_t *out_sig, unsigned int *out_siglen, const DSA *dsa) { … }

int DSA_verify(int type, const uint8_t *digest, size_t digest_len,
               const uint8_t *sig, size_t sig_len, const DSA *dsa) { … }

int DSA_check_signature(int *out_valid, const uint8_t *digest,
                        size_t digest_len, const uint8_t *sig, size_t sig_len,
                        const DSA *dsa) { … }

// der_len_len returns the number of bytes needed to represent a length of |len|
// in DER.
static size_t der_len_len(size_t len) { … }

int DSA_size(const DSA *dsa) { … }

static int dsa_sign_setup(const DSA *dsa, BN_CTX *ctx, BIGNUM **out_kinv,
                          BIGNUM **out_r) { … }

int DSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_unused *unused,
                         CRYPTO_EX_dup *dup_unused, CRYPTO_EX_free *free_func) { … }

int DSA_set_ex_data(DSA *dsa, int idx, void *arg) { … }

void *DSA_get_ex_data(const DSA *dsa, int idx) { … }

DH *DSA_dup_DH(const DSA *dsa) { … }
chromium/third_party/boringssl/src/crypto/dsa/dsa.c
