C++ BN_mod_exp_mont函数代码示例

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本文整理汇总了C++中BN_mod_exp_mont函数的典型用法代码示例。如果您正苦于以下问题：C++ BN_mod_exp_mont函数的具体用法？C++ BN_mod_exp_mont怎么用？C++ BN_mod_exp_mont使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。

在下文中一共展示了BN_mod_exp_mont函数的20个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的C++代码示例。

示例1: witness

static int witness(BIGNUM *w, const BIGNUM *a, const BIGNUM *a1,
                   const BIGNUM *a1_odd, int k, BN_CTX *ctx,
                   BN_MONT_CTX *mont)
{
    if (!BN_mod_exp_mont(w, w, a1_odd, a, ctx, mont)) /* w := w^a1_odd mod a */
        return -1;
    if (BN_is_one(w))
        return 0;               /* probably prime */
    if (BN_cmp(w, a1) == 0)
        return 0;               /* w == -1 (mod a), 'a' is probably prime */
    while (--k) {
        if (!BN_mod_mul(w, w, w, a, ctx)) /* w := w^2 mod a */
            return -1;
        if (BN_is_one(w))
            return 1;           /* 'a' is composite, otherwise a previous 'w'
                                 * would have been == -1 (mod 'a') */
        if (BN_cmp(w, a1) == 0)
            return 0;           /* w == -1 (mod a), 'a' is probably prime */
    }
    /*
     * If we get here, 'w' is the (a-1)/2-th power of the original 'w', and
     * it is neither -1 nor +1 -- so 'a' cannot be prime
     */
    bn_check_top(w);
    return 1;
}

开发者ID:Bilibili，项目名称:openssl，代码行数:26，代码来源:bn_prime.c

示例2: do_mul_exp

void do_mul_exp(BIGNUM *r, BIGNUM *a, BIGNUM *b, BIGNUM *c, BN_CTX *ctx)
	{
	int i,k;
	double tm;
	long num;
	BN_MONT_CTX m;

	memset(&m,0,sizeof(m));

	num=BASENUM;
	for (i=0; i<NUM_SIZES; i++)
		{
		BN_rand(a,sizes[i],1,0);
		BN_rand(b,sizes[i],1,0);
		BN_rand(c,sizes[i],1,1);
		BN_mod(a,a,c,ctx);
		BN_mod(b,b,c,ctx);

		BN_MONT_CTX_set(&m,c,ctx);

		Time_F(START);
		for (k=0; k<num; k++)
			BN_mod_exp_mont(r,a,b,c,ctx,&m);
		tm=Time_F(STOP);
		printf("mul %4d ^ %4d %% %d -> %8.3fms %5.1f\n",sizes[i],sizes[i],sizes[i],tm*1000.0/num,tm*mul_c[i]/num);
		num/=7;
		if (num <= 0) num=1;
		}

	}

开发者ID:robacklin，项目名称:uclinux-linux，代码行数:30，代码来源:expspeed.c

示例3: bn_blinding_create_param

static int bn_blinding_create_param(BN_BLINDING *b, BN_CTX *ctx,
                                    const BN_MONT_CTX *mont_ctx) {
  int retry_counter = 32;

  do {
    if (!BN_rand_range(b->A, b->mod)) {
      OPENSSL_PUT_ERROR(RSA, ERR_R_INTERNAL_ERROR);
      return 0;
    }

    int no_inverse;
    if (BN_mod_inverse_ex(b->Ai, &no_inverse, b->A, b->mod, ctx) == NULL) {
      /* this should almost never happen for good RSA keys */
      if (no_inverse) {
        if (retry_counter-- == 0) {
          OPENSSL_PUT_ERROR(RSA, RSA_R_TOO_MANY_ITERATIONS);
          return 0;
        }
        ERR_clear_error();
      } else {
        OPENSSL_PUT_ERROR(RSA, ERR_R_INTERNAL_ERROR);
        return 0;
      }
    } else {
      break;
    }
  } while (1);

  if (!BN_mod_exp_mont(b->A, b->A, b->e, b->mod, ctx, mont_ctx)) {
    OPENSSL_PUT_ERROR(RSA, ERR_R_INTERNAL_ERROR);
    return 0;
  }

  return 1;
}

开发者ID:Wendy1106，项目名称:Emma，代码行数:35，代码来源:blinding.c

示例4: dh_bn_mod_exp

static int dh_bn_mod_exp(DH *dh, BIGNUM *r, BIGNUM *a, const BIGNUM *p,
			const BIGNUM *m, BN_CTX *ctx,
			BN_MONT_CTX *m_ctx)
	{
	if (a->top == 1)
		{
		BN_ULONG A = a->d[0];
		return BN_mod_exp_mont_word(r,A,p,m,ctx,m_ctx);
		}
	else
		return BN_mod_exp_mont(r,a,p,m,ctx,m_ctx);
	}

开发者ID:robacklin，项目名称:uclinux-linux，代码行数:12，代码来源:dh_key.c

示例5: dh_bn_mod_exp

static int dh_bn_mod_exp(const DH *dh, BIGNUM *r,
                         const BIGNUM *a, const BIGNUM *p,
                         const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
{
    /*
     * If a is only one word long and constant time is false, use the faster
     * exponenentiation function.
     */
    if (a->top == 1 && ((dh->flags & DH_FLAG_NO_EXP_CONSTTIME) != 0)) {
        BN_ULONG A = a->d[0];
        return BN_mod_exp_mont_word(r, A, p, m, ctx, m_ctx);
    } else
        return BN_mod_exp_mont(r, a, p, m, ctx, m_ctx);
}

开发者ID:NickAger，项目名称:elm-slider，代码行数:14，代码来源:dh_key.c

示例6: bn_blinding_create_param

static int bn_blinding_create_param(BN_BLINDING *b, const RSA *rsa, BN_CTX *ctx) {
  int retry_counter = 32;

  do {
    if (!BN_rand_range(b->A, rsa->n)) {
      OPENSSL_PUT_ERROR(RSA, ERR_R_INTERNAL_ERROR);
      return 0;
    }

    /* `BN_from_montgomery` + `BN_mod_inverse_no_branch` is equivalent to, but
     * more efficient than, `BN_mod_inverse_no_branch` + `BN_to_montgomery`. */

    if (!BN_from_montgomery(b->Ai, b->A, rsa->mont_n, ctx)) {
      return 0;
    }

    assert(BN_get_flags(b->A, BN_FLG_CONSTTIME));
    int no_inverse;
    if (BN_mod_inverse_no_branch(b->Ai, &no_inverse, b->Ai, rsa->n, ctx) ==
        NULL) {
      /* this should almost never happen for good RSA keys */
      if (no_inverse) {
        if (retry_counter-- == 0) {
          OPENSSL_PUT_ERROR(RSA, RSA_R_TOO_MANY_ITERATIONS);
          return 0;
        }
        ERR_clear_error();
      } else {
        OPENSSL_PUT_ERROR(RSA, ERR_R_INTERNAL_ERROR);
        return 0;
      }
    } else {
      break;
    }
  } while (1);

  if (!BN_mod_exp_mont(b->A, b->A, rsa->e, rsa->n, ctx, rsa->mont_n)) {
    OPENSSL_PUT_ERROR(RSA, ERR_R_INTERNAL_ERROR);
    return 0;
  }

  if (!BN_to_montgomery(b->A, b->A, rsa->mont_n, ctx)) {
    OPENSSL_PUT_ERROR(RSA, ERR_R_INTERNAL_ERROR);
    return 0;
  }
  return 1;
}

开发者ID:Ms2ger，项目名称:ring，代码行数:47，代码来源:blinding.c

示例7: ec_field_inverse_mod_ord

static int ec_field_inverse_mod_ord(const EC_GROUP *group, BIGNUM *r,
                                    const BIGNUM *x, BN_CTX *ctx)
{
    BIGNUM *e = NULL;
    BN_CTX *new_ctx = NULL;
    int ret = 0;

    if (group->mont_data == NULL)
        return 0;

    if (ctx == NULL && (ctx = new_ctx = BN_CTX_secure_new()) == NULL)
        return 0;

    BN_CTX_start(ctx);
    if ((e = BN_CTX_get(ctx)) == NULL)
        goto err;

    /*-
     * We want inverse in constant time, therefore we utilize the fact
     * order must be prime and use Fermats Little Theorem instead.
     */
    if (!BN_set_word(e, 2))
        goto err;
    if (!BN_sub(e, group->order, e))
        goto err;
    /*-
     * Exponent e is public.
     * No need for scatter-gather or BN_FLG_CONSTTIME.
     */
    if (!BN_mod_exp_mont(r, x, e, group->order, ctx, group->mont_data))
        goto err;

    ret = 1;

 err:
    if (ctx != NULL)
        BN_CTX_end(ctx);
    BN_CTX_free(new_ctx);
    return ret;
}

开发者ID:RTEMS，项目名称:rtems-libbsd，代码行数:40，代码来源:ec_lib.c

示例8: BN_enhanced_miller_rabin_primality_test

int BN_enhanced_miller_rabin_primality_test(
    enum bn_primality_result_t *out_result, const BIGNUM *w, int iterations,
    BN_CTX *ctx, BN_GENCB *cb) {
  /* Enhanced Miller-Rabin is only valid on odd integers greater than 3. */
  if (!BN_is_odd(w) || BN_cmp_word(w, 3) <= 0) {
    OPENSSL_PUT_ERROR(BN, BN_R_INVALID_INPUT);
    return 0;
  }

  if (iterations == BN_prime_checks) {
    iterations = BN_prime_checks_for_size(BN_num_bits(w));
  }

  int ret = 0;
  BN_MONT_CTX *mont = NULL;

  BN_CTX_start(ctx);

  BIGNUM *w1 = BN_CTX_get(ctx);
  if (w1 == NULL ||
      !BN_copy(w1, w) ||
      !BN_sub_word(w1, 1)) {
    goto err;
  }

  /* Write w1 as m*2^a (Steps 1 and 2). */
  int a = 0;
  while (!BN_is_bit_set(w1, a)) {
    a++;
  }
  BIGNUM *m = BN_CTX_get(ctx);
  if (m == NULL ||
      !BN_rshift(m, w1, a)) {
    goto err;
  }

  BIGNUM *b = BN_CTX_get(ctx);
  BIGNUM *g = BN_CTX_get(ctx);
  BIGNUM *z = BN_CTX_get(ctx);
  BIGNUM *x = BN_CTX_get(ctx);
  BIGNUM *x1 = BN_CTX_get(ctx);
  if (b == NULL ||
      g == NULL ||
      z == NULL ||
      x == NULL ||
      x1 == NULL) {
    goto err;
  }

  /* Montgomery setup for computations mod A */
  mont = BN_MONT_CTX_new();
  if (mont == NULL ||
      !BN_MONT_CTX_set(mont, w, ctx)) {
    goto err;
  }

  /* The following loop performs in inner iteration of the Enhanced Miller-Rabin
   * Primality test (Step 4). */
  for (int i = 1; i <= iterations; i++) {
    /* Step 4.1-4.2 */
    if (!BN_rand_range_ex(b, 2, w1)) {
      goto err;
    }

    /* Step 4.3-4.4 */
    if (!BN_gcd(g, b, w, ctx)) {
      goto err;
    }
    if (BN_cmp_word(g, 1) > 0) {
      *out_result = bn_composite;
      ret = 1;
      goto err;
    }

    /* Step 4.5 */
    if (!BN_mod_exp_mont(z, b, m, w, ctx, mont)) {
      goto err;
    }

    /* Step 4.6 */
    if (BN_is_one(z) || BN_cmp(z, w1) == 0) {
      goto loop;
    }

    /* Step 4.7 */
    for (int j = 1; j < a; j++) {
      if (!BN_copy(x, z) || !BN_mod_mul(z, x, x, w, ctx)) {
        goto err;
      }
      if (BN_cmp(z, w1) == 0) {
        goto loop;
      }
      if (BN_is_one(z)) {
        goto composite;
      }
    }

    /* Step 4.8-4.9 */
    if (!BN_copy(x, z) || !BN_mod_mul(z, x, x, w, ctx)) {
      goto err;
//.........这里部分代码省略.........

开发者ID:ThomasWo，项目名称:proto-quic，代码行数:101，代码来源:prime.c

示例9: test_exp_mod_zero

/*
 * test_exp_mod_zero tests that x**0 mod 1 == 0. It returns zero on success.
 */
static int test_exp_mod_zero()
{
    BIGNUM *a = NULL, *p = NULL, *m = NULL;
    BIGNUM *r = NULL;
    BN_ULONG one_word = 1;
    BN_CTX *ctx = BN_CTX_new();
    int ret = 1, failed = 0;

    m = BN_new();
    if (!m)
        goto err;
    BN_one(m);

    a = BN_new();
    if (!a)
        goto err;
    BN_one(a);

    p = BN_new();
    if (!p)
        goto err;
    BN_zero(p);

    r = BN_new();
    if (!r)
        goto err;

    if (!BN_rand(a, 1024, BN_RAND_TOP_ONE, BN_RAND_BOTTOM_ANY))
        goto err;

    if (!BN_mod_exp(r, a, p, m, ctx))
        goto err;

    if (!a_is_zero_mod_one("BN_mod_exp", r, a))
        failed = 1;

    if (!BN_mod_exp_recp(r, a, p, m, ctx))
        goto err;

    if (!a_is_zero_mod_one("BN_mod_exp_recp", r, a))
        failed = 1;

    if (!BN_mod_exp_simple(r, a, p, m, ctx))
        goto err;

    if (!a_is_zero_mod_one("BN_mod_exp_simple", r, a))
        failed = 1;

    if (!BN_mod_exp_mont(r, a, p, m, ctx, NULL))
        goto err;

    if (!a_is_zero_mod_one("BN_mod_exp_mont", r, a))
        failed = 1;

    if (!BN_mod_exp_mont_consttime(r, a, p, m, ctx, NULL)) {
        goto err;
    }

    if (!a_is_zero_mod_one("BN_mod_exp_mont_consttime", r, a))
        failed = 1;

    /*
     * A different codepath exists for single word multiplication
     * in non-constant-time only.
     */
    if (!BN_mod_exp_mont_word(r, one_word, p, m, ctx, NULL))
        goto err;

    if (!BN_is_zero(r)) {
        fprintf(stderr, "BN_mod_exp_mont_word failed:\n");
        fprintf(stderr, "1 ** 0 mod 1 = r (should be 0)\n");
        fprintf(stderr, "r = ");
        BN_print_fp(stderr, r);
        fprintf(stderr, "\n");
        return 0;
    }

    ret = failed;

 err:
    BN_free(r);
    BN_free(a);
    BN_free(p);
    BN_free(m);
    BN_CTX_free(ctx);

    return ret;
}

开发者ID:Castaglia，项目名称:openssl，代码行数:91，代码来源:exptest.c

示例10: rsa_ossl_mod_exp

static int rsa_ossl_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx)
{
    BIGNUM *r1, *m1, *vrfy, *r2, *m[RSA_MAX_PRIME_NUM - 2];
    int ret = 0, i, ex_primes = 0, smooth = 0;
    RSA_PRIME_INFO *pinfo;

    BN_CTX_start(ctx);

    r1 = BN_CTX_get(ctx);
    r2 = BN_CTX_get(ctx);
    m1 = BN_CTX_get(ctx);
    vrfy = BN_CTX_get(ctx);
    if (vrfy == NULL)
        goto err;

    if (rsa->version == RSA_ASN1_VERSION_MULTI
        && ((ex_primes = sk_RSA_PRIME_INFO_num(rsa->prime_infos)) <= 0
             || ex_primes > RSA_MAX_PRIME_NUM - 2))
        goto err;

    if (rsa->flags & RSA_FLAG_CACHE_PRIVATE) {
        BIGNUM *factor = BN_new();

        if (factor == NULL)
            goto err;

        /*
         * Make sure BN_mod_inverse in Montgomery initialization uses the
         * BN_FLG_CONSTTIME flag
         */
        if (!(BN_with_flags(factor, rsa->p, BN_FLG_CONSTTIME),
              BN_MONT_CTX_set_locked(&rsa->_method_mod_p, rsa->lock,
                                     factor, ctx))
            || !(BN_with_flags(factor, rsa->q, BN_FLG_CONSTTIME),
                 BN_MONT_CTX_set_locked(&rsa->_method_mod_q, rsa->lock,
                                        factor, ctx))) {
            BN_free(factor);
            goto err;
        }
        for (i = 0; i < ex_primes; i++) {
            pinfo = sk_RSA_PRIME_INFO_value(rsa->prime_infos, i);
            BN_with_flags(factor, pinfo->r, BN_FLG_CONSTTIME);
            if (!BN_MONT_CTX_set_locked(&pinfo->m, rsa->lock, factor, ctx)) {
                BN_free(factor);
                goto err;
            }
        }
        /*
         * We MUST free |factor| before any further use of the prime factors
         */
        BN_free(factor);

        smooth = (ex_primes == 0)
                 && (rsa->meth->bn_mod_exp == BN_mod_exp_mont)
                 && (BN_num_bits(rsa->q) == BN_num_bits(rsa->p));
    }

    if (rsa->flags & RSA_FLAG_CACHE_PUBLIC)
        if (!BN_MONT_CTX_set_locked(&rsa->_method_mod_n, rsa->lock,
                                    rsa->n, ctx))
            goto err;

    if (smooth) {
        /*
         * Conversion from Montgomery domain, a.k.a. Montgomery reduction,
         * accepts values in [0-m*2^w) range. w is m's bit width rounded up
         * to limb width. So that at the very least if |I| is fully reduced,
         * i.e. less than p*q, we can count on from-to round to perform
         * below modulo operations on |I|. Unlike BN_mod it's constant time.
         */
        if (/* m1 = I moq q */
            !bn_from_mont_fixed_top(m1, I, rsa->_method_mod_q, ctx)
            || !bn_to_mont_fixed_top(m1, m1, rsa->_method_mod_q, ctx)
            /* m1 = m1^dmq1 mod q */
            || !BN_mod_exp_mont_consttime(m1, m1, rsa->dmq1, rsa->q, ctx,
                                          rsa->_method_mod_q)
            /* r1 = I mod p */
            || !bn_from_mont_fixed_top(r1, I, rsa->_method_mod_p, ctx)
            || !bn_to_mont_fixed_top(r1, r1, rsa->_method_mod_p, ctx)
            /* r1 = r1^dmp1 mod p */
            || !BN_mod_exp_mont_consttime(r1, r1, rsa->dmp1, rsa->p, ctx,
                                          rsa->_method_mod_p)
            /* r1 = (r1 - m1) mod p */
            /*
             * bn_mod_sub_fixed_top is not regular modular subtraction,
             * it can tolerate subtrahend to be larger than modulus, but
             * not bit-wise wider. This makes up for uncommon q>p case,
             * when |m1| can be larger than |rsa->p|.
             */
            || !bn_mod_sub_fixed_top(r1, r1, m1, rsa->p)

            /* r1 = r1 * iqmp mod p */
            || !bn_to_mont_fixed_top(r1, r1, rsa->_method_mod_p, ctx)
            || !bn_mul_mont_fixed_top(r1, r1, rsa->iqmp, rsa->_method_mod_p,
                                      ctx)
            /* r0 = r1 * q + m1 */
            || !bn_mul_fixed_top(r0, r1, rsa->q, ctx)
            || !bn_mod_add_fixed_top(r0, r0, m1, rsa->n))
            goto err;

//.........这里部分代码省略.........

开发者ID:upadhyaym，项目名称:openssl，代码行数:101，代码来源:rsa_ossl.c

示例11: rsa_default_private_transform

int rsa_default_private_transform(RSA *rsa, uint8_t *out, const uint8_t *in,
                                  size_t len) {
  if (rsa->n == NULL || rsa->d == NULL) {
    OPENSSL_PUT_ERROR(RSA, RSA_R_VALUE_MISSING);
    return 0;
  }

  BIGNUM *f, *result;
  BN_CTX *ctx = NULL;
  unsigned blinding_index = 0;
  BN_BLINDING *blinding = NULL;
  int ret = 0;

  ctx = BN_CTX_new();
  if (ctx == NULL) {
    goto err;
  }
  BN_CTX_start(ctx);
  f = BN_CTX_get(ctx);
  result = BN_CTX_get(ctx);

  if (f == NULL || result == NULL) {
    OPENSSL_PUT_ERROR(RSA, ERR_R_MALLOC_FAILURE);
    goto err;
  }

  if (BN_bin2bn(in, len, f) == NULL) {
    goto err;
  }

  if (BN_ucmp(f, rsa->n) >= 0) {
    // Usually the padding functions would catch this.
    OPENSSL_PUT_ERROR(RSA, RSA_R_DATA_TOO_LARGE);
    goto err;
  }

  if (!freeze_private_key(rsa, ctx)) {
    OPENSSL_PUT_ERROR(RSA, ERR_R_INTERNAL_ERROR);
    goto err;
  }

  const int do_blinding = (rsa->flags & RSA_FLAG_NO_BLINDING) == 0;

  if (rsa->e == NULL && do_blinding) {
    // We cannot do blinding or verification without |e|, and continuing without
    // those countermeasures is dangerous. However, the Java/Android RSA API
    // requires support for keys where only |d| and |n| (and not |e|) are known.
    // The callers that require that bad behavior set |RSA_FLAG_NO_BLINDING|.
    OPENSSL_PUT_ERROR(RSA, RSA_R_NO_PUBLIC_EXPONENT);
    goto err;
  }

  if (do_blinding) {
    blinding = rsa_blinding_get(rsa, &blinding_index, ctx);
    if (blinding == NULL) {
      OPENSSL_PUT_ERROR(RSA, ERR_R_INTERNAL_ERROR);
      goto err;
    }
    if (!BN_BLINDING_convert(f, blinding, rsa->e, rsa->mont_n, ctx)) {
      goto err;
    }
  }

  if (rsa->p != NULL && rsa->q != NULL && rsa->e != NULL && rsa->dmp1 != NULL &&
      rsa->dmq1 != NULL && rsa->iqmp != NULL) {
    if (!mod_exp(result, f, rsa, ctx)) {
      goto err;
    }
  } else if (!BN_mod_exp_mont_consttime(result, f, rsa->d_fixed, rsa->n, ctx,
                                        rsa->mont_n)) {
    goto err;
  }

  // Verify the result to protect against fault attacks as described in the
  // 1997 paper "On the Importance of Checking Cryptographic Protocols for
  // Faults" by Dan Boneh, Richard A. DeMillo, and Richard J. Lipton. Some
  // implementations do this only when the CRT is used, but we do it in all
  // cases. Section 6 of the aforementioned paper describes an attack that
  // works when the CRT isn't used. That attack is much less likely to succeed
  // than the CRT attack, but there have likely been improvements since 1997.
  //
  // This check is cheap assuming |e| is small; it almost always is.
  if (rsa->e != NULL) {
    BIGNUM *vrfy = BN_CTX_get(ctx);
    if (vrfy == NULL ||
        !BN_mod_exp_mont(vrfy, result, rsa->e, rsa->n, ctx, rsa->mont_n) ||
        !BN_equal_consttime(vrfy, f)) {
      OPENSSL_PUT_ERROR(RSA, ERR_R_INTERNAL_ERROR);
      goto err;
    }

  }

  if (do_blinding &&
      !BN_BLINDING_invert(result, blinding, rsa->mont_n, ctx)) {
    goto err;
  }

  // The computation should have left |result| as a maximally-wide number, so
  // that it and serializing does not leak information about the magnitude of
//.........这里部分代码省略.........

开发者ID:MateusDeSousa，项目名称:FiqueRico，代码行数:101，代码来源:rsa_impl.c

示例12: dsa_builtin_paramgen


//.........这里部分代码省略.........
            for (k=0; k<=n; k++)
            {
                /* obtain "SEED + offset + k" by incrementing: */
                for (i=SHA_DIGEST_LENGTH-1; i >= 0; i--)
                {
                    buf[i]++;
                    if (buf[i] != 0) break;
                }

                EVP_Digest(buf,SHA_DIGEST_LENGTH,md,NULL,HASH, NULL);

                /* step 8 */
                if (!BN_bin2bn(md,SHA_DIGEST_LENGTH,r0))
                    goto err;
                if (!BN_lshift(r0,r0,160*k)) goto err;
                if (!BN_add(W,W,r0)) goto err;
            }

            /* more of step 8 */
            if (!BN_mask_bits(W,bits-1)) goto err;
            if (!BN_copy(X,W)) goto err;
            if (!BN_add(X,X,test)) goto err;

            /* step 9 */
            if (!BN_lshift1(r0,q)) goto err;
            if (!BN_mod(c,X,r0,ctx)) goto err;
            if (!BN_sub(r0,c,BN_value_one())) goto err;
            if (!BN_sub(p,X,r0)) goto err;

            /* step 10 */
            if (BN_cmp(p,test) >= 0)
            {
                /* step 11 */
                r = BN_is_prime_fasttest_ex(p, DSS_prime_checks,
                                            ctx, 1, cb);
                if (r > 0)
                    goto end; /* found it */
                if (r != 0)
                    goto err;
            }

            /* step 13 */
            counter++;
            /* "offset = offset + n + 1" */

            /* step 14 */
            if (counter >= 4096) break;
        }
    }
end:
    if(!BN_GENCB_call(cb, 2, 1))
        goto err;

    /* We now need to generate g */
    /* Set r0=(p-1)/q */
    if (!BN_sub(test,p,BN_value_one())) goto err;
    if (!BN_div(r0,NULL,test,q,ctx)) goto err;

    if (!BN_set_word(test,h)) goto err;
    if (!BN_MONT_CTX_set(mont,p,ctx)) goto err;

    for (;;)
    {
        /* g=test^r0%p */
        if (!BN_mod_exp_mont(g,test,r0,p,ctx,mont)) goto err;
        if (!BN_is_one(g)) break;
        if (!BN_add(test,test,BN_value_one())) goto err;
        h++;
    }

    if(!BN_GENCB_call(cb, 3, 1))
        goto err;

    ok=1;
err:
    if (ok)
    {
        if(ret->p) BN_free(ret->p);
        if(ret->q) BN_free(ret->q);
        if(ret->g) BN_free(ret->g);
        ret->p=BN_dup(p);
        ret->q=BN_dup(q);
        ret->g=BN_dup(g);
        if (ret->p == NULL || ret->q == NULL || ret->g == NULL)
        {
            ok=0;
            goto err;
        }
        if (seed_in != NULL) memcpy(seed_in,seed,20);
        if (counter_ret != NULL) *counter_ret=counter;
        if (h_ret != NULL) *h_ret=h;
    }
    if(ctx)
    {
        BN_CTX_end(ctx);
        BN_CTX_free(ctx);
    }
    if (mont != NULL) BN_MONT_CTX_free(mont);
    return ok;
}

开发者ID:SteamG，项目名称:MinnowBoard，代码行数:101，代码来源:fips_dsa_gen.c

示例13: dsa_bn_mod_exp

static int dsa_bn_mod_exp(DSA *dsa, BIGNUM *r, BIGNUM *a, const BIGNUM *p,
				const BIGNUM *m, BN_CTX *ctx,
				BN_MONT_CTX *m_ctx)
{
	return BN_mod_exp_mont(r, a, p, m, ctx, m_ctx);
}

开发者ID:aosm，项目名称:OpenSSL097，代码行数:6，代码来源:dsa_ossl.c

示例14: dsa_do_verify

static int dsa_do_verify(const unsigned char *dgst, int dgst_len, DSA_SIG *sig,
		  DSA *dsa)
	{
	BN_CTX *ctx;
	BIGNUM u1,u2,t1;
	BN_MONT_CTX *mont=NULL;
	int ret = -1;
	if (!dsa->p || !dsa->q || !dsa->g)
		{
		DSAerr(DSA_F_DSA_DO_VERIFY,DSA_R_MISSING_PARAMETERS);
		return -1;
		}

	if (BN_num_bits(dsa->q) != 160)
		{
		DSAerr(DSA_F_DSA_DO_VERIFY,DSA_R_BAD_Q_VALUE);
		return -1;
		}

	if (BN_num_bits(dsa->p) > OPENSSL_DSA_MAX_MODULUS_BITS)
		{
		DSAerr(DSA_F_DSA_DO_VERIFY,DSA_R_MODULUS_TOO_LARGE);
		return -1;
		}

	BN_init(&u1);
	BN_init(&u2);
	BN_init(&t1);

	if ((ctx=BN_CTX_new()) == NULL) goto err;

	if (BN_is_zero(sig->r) || sig->r->neg || BN_ucmp(sig->r, dsa->q) >= 0)
		{
		ret = 0;
		goto err;
		}
	if (BN_is_zero(sig->s) || sig->s->neg || BN_ucmp(sig->s, dsa->q) >= 0)
		{
		ret = 0;
		goto err;
		}

	/* Calculate W = inv(S) mod Q
	 * save W in u2 */
	if ((BN_mod_inverse(&u2,sig->s,dsa->q,ctx)) == NULL) goto err;

	/* save M in u1 */
	if (BN_bin2bn(dgst,dgst_len,&u1) == NULL) goto err;

	/* u1 = M * w mod q */
	if (!BN_mod_mul(&u1,&u1,&u2,dsa->q,ctx)) goto err;

	/* u2 = r * w mod q */
	if (!BN_mod_mul(&u2,sig->r,&u2,dsa->q,ctx)) goto err;


	if (dsa->flags & DSA_FLAG_CACHE_MONT_P)
		{
		mont = BN_MONT_CTX_set_locked(
					(BN_MONT_CTX **)&dsa->method_mont_p,
					CRYPTO_LOCK_DSA, dsa->p, ctx);
		if (!mont)
			goto err;
		}

#if 0
	{
	BIGNUM t2;

	BN_init(&t2);
	/* v = ( g^u1 * y^u2 mod p ) mod q */
	/* let t1 = g ^ u1 mod p */
	if (!BN_mod_exp_mont(&t1,dsa->g,&u1,dsa->p,ctx,mont)) goto err;
	/* let t2 = y ^ u2 mod p */
	if (!BN_mod_exp_mont(&t2,dsa->pub_key,&u2,dsa->p,ctx,mont)) goto err;
	/* let u1 = t1 * t2 mod p */
	if (!BN_mod_mul(&u1,&t1,&t2,dsa->p,ctx)) goto err_bn;
	BN_free(&t2);
	}
	/* let u1 = u1 mod q */
	if (!BN_mod(&u1,&u1,dsa->q,ctx)) goto err;
#else
	{
	if (!dsa->meth->dsa_mod_exp(dsa, &t1,dsa->g,&u1,dsa->pub_key,&u2,
						dsa->p,ctx,mont)) goto err;
	/* BN_copy(&u1,&t1); */
	/* let u1 = u1 mod q */
	if (!BN_mod(&u1,&t1,dsa->q,ctx)) goto err;
	}
#endif
	/* V is now in u1.  If the signature is correct, it will be
	 * equal to R. */
	ret=(BN_ucmp(&u1, sig->r) == 0);

	err:
	if (ret != 1) DSAerr(DSA_F_DSA_DO_VERIFY,ERR_R_BN_LIB);
	if (ctx != NULL) BN_CTX_free(ctx);
	BN_free(&u1);
	BN_free(&u2);
	BN_free(&t1);
//.........这里部分代码省略.........

开发者ID:aosm，项目名称:OpenSSL097，代码行数:101，代码来源:dsa_ossl.c

示例15: BN_BLINDING_new

BN_BLINDING *BN_BLINDING_create_param(
    BN_BLINDING *b, const BIGNUM *e, BIGNUM *m, BN_CTX *ctx,
    const BN_MONT_CTX *mont) {
  int retry_counter = 32;
  BN_BLINDING *ret = NULL;

  if (b == NULL) {
    ret = BN_BLINDING_new(NULL, NULL, m);
  } else {
    ret = b;
  }

  if (ret == NULL) {
    goto err;
  }

  if (ret->A == NULL && (ret->A = BN_new()) == NULL) {
    goto err;
  }
  if (ret->Ai == NULL && (ret->Ai = BN_new()) == NULL) {
    goto err;
  }

  if (e != NULL) {
    BN_free(ret->e);
    ret->e = BN_dup(e);
  }
  if (ret->e == NULL) {
    goto err;
  }

  if (mont != NULL) {
    ret->mont = mont;
  }

  do {
    if (!BN_rand_range(ret->A, ret->mod)) {
      goto err;
    }

    int no_inverse;
    if (BN_mod_inverse_ex(ret->Ai, &no_inverse, ret->A, ret->mod, ctx) == NULL) {
      /* this should almost never happen for good RSA keys */
      if (no_inverse) {
        if (retry_counter-- == 0) {
          OPENSSL_PUT_ERROR(RSA, RSA_R_TOO_MANY_ITERATIONS);
          goto err;
        }
        ERR_clear_error();
      } else {
        goto err;
      }
    } else {
      break;
    }
  } while (1);

  if (!BN_mod_exp_mont(ret->A, ret->A, ret->e, ret->mod, ctx, ret->mont)) {
    goto err;
  }

  return ret;

err:
  if (b == NULL) {
    BN_BLINDING_free(ret);
    ret = NULL;
  }

  return ret;
}

开发者ID:reaperhulk，项目名称:ring，代码行数:71，代码来源:blinding.c

示例16: dsa_do_verify

static int dsa_do_verify(const unsigned char *dgst, int dgst_len, DSA_SIG *sig,
		  DSA *dsa)
	{
	BN_CTX *ctx;
	BIGNUM u1,u2,t1;
	BN_MONT_CTX *mont=NULL;
	int ret = -1;

	if ((ctx=BN_CTX_new()) == NULL) goto err;
	BN_init(&u1);
	BN_init(&u2);
	BN_init(&t1);

	if (BN_is_zero(sig->r) || sig->r->neg || BN_ucmp(sig->r, dsa->q) >= 0)
		{
		ret = 0;
		goto err;
		}
	if (BN_is_zero(sig->s) || sig->s->neg || BN_ucmp(sig->s, dsa->q) >= 0)
		{
		ret = 0;
		goto err;
		}

	/* Calculate W = inv(S) mod Q
	 * save W in u2 */
	if ((BN_mod_inverse(&u2,sig->s,dsa->q,ctx)) == NULL) goto err;

	/* save M in u1 */
	if (BN_bin2bn(dgst,dgst_len,&u1) == NULL) goto err;

	/* u1 = M * w mod q */
	if (!BN_mod_mul(&u1,&u1,&u2,dsa->q,ctx)) goto err;

	/* u2 = r * w mod q */
	if (!BN_mod_mul(&u2,sig->r,&u2,dsa->q,ctx)) goto err;

	if ((dsa->method_mont_p == NULL) && (dsa->flags & DSA_FLAG_CACHE_MONT_P))
		{
		if ((dsa->method_mont_p=(char *)BN_MONT_CTX_new()) != NULL)
			if (!BN_MONT_CTX_set((BN_MONT_CTX *)dsa->method_mont_p,
				dsa->p,ctx)) goto err;
		}
	mont=(BN_MONT_CTX *)dsa->method_mont_p;

#if 0
	{
	BIGNUM t2;

	BN_init(&t2);
	/* v = ( g^u1 * y^u2 mod p ) mod q */
	/* let t1 = g ^ u1 mod p */
	if (!BN_mod_exp_mont(&t1,dsa->g,&u1,dsa->p,ctx,mont)) goto err;
	/* let t2 = y ^ u2 mod p */
	if (!BN_mod_exp_mont(&t2,dsa->pub_key,&u2,dsa->p,ctx,mont)) goto err;
	/* let u1 = t1 * t2 mod p */
	if (!BN_mod_mul(&u1,&t1,&t2,dsa->p,ctx)) goto err_bn;
	BN_free(&t2);
	}
	/* let u1 = u1 mod q */
	if (!BN_mod(&u1,&u1,dsa->q,ctx)) goto err;
#else
	{
	if (!dsa->meth->dsa_mod_exp(dsa, &t1,dsa->g,&u1,dsa->pub_key,&u2,
						dsa->p,ctx,mont)) goto err;
	/* BN_copy(&u1,&t1); */
	/* let u1 = u1 mod q */
	if (!BN_mod(&u1,&t1,dsa->q,ctx)) goto err;
	}
#endif
	/* V is now in u1.  If the signature is correct, it will be
	 * equal to R. */
	ret=(BN_ucmp(&u1, sig->r) == 0);

	err:
	if (ret != 1) DSAerr(DSA_F_DSA_DO_VERIFY,ERR_R_BN_LIB);
	if (ctx != NULL) BN_CTX_free(ctx);
	BN_free(&u1);
	BN_free(&u2);
	BN_free(&t1);
	return(ret);
	}

开发者ID:aosm，项目名称:OpenSSL096，代码行数:82，代码来源:dsa_ossl.c

示例17: main

int main(int argc, char *argv[])
{
    BN_CTX *ctx;
    BIO *out = NULL;
    int i, ret;
    unsigned char c;
    BIGNUM *r_mont, *r_mont_const, *r_recp, *r_simple, *a, *b, *m;

    RAND_seed(rnd_seed, sizeof rnd_seed); /* or BN_rand may fail, and we
                                           * don't even check its return
                                           * value (which we should) */

    ERR_load_BN_strings();

    ctx = BN_CTX_new();
    if (ctx == NULL)
        EXIT(1);
    r_mont = BN_new();
    r_mont_const = BN_new();
    r_recp = BN_new();
    r_simple = BN_new();
    a = BN_new();
    b = BN_new();
    m = BN_new();
    if ((r_mont == NULL) || (r_recp == NULL) || (a == NULL) || (b == NULL))
        goto err;

    out = BIO_new(BIO_s_file());

    if (out == NULL)
        EXIT(1);
    BIO_set_fp(out, stdout, BIO_NOCLOSE);

    for (i = 0; i < 200; i++) {
        RAND_bytes(&c, 1);
        c = (c % BN_BITS) - BN_BITS2;
        BN_rand(a, NUM_BITS + c, 0, 0);

        RAND_bytes(&c, 1);
        c = (c % BN_BITS) - BN_BITS2;
        BN_rand(b, NUM_BITS + c, 0, 0);

        RAND_bytes(&c, 1);
        c = (c % BN_BITS) - BN_BITS2;
        BN_rand(m, NUM_BITS + c, 0, 1);

        BN_mod(a, a, m, ctx);
        BN_mod(b, b, m, ctx);

        ret = BN_mod_exp_mont(r_mont, a, b, m, ctx, NULL);
        if (ret <= 0) {
            printf("BN_mod_exp_mont() problems\n");
            ERR_print_errors(out);
            EXIT(1);
        }

        ret = BN_mod_exp_recp(r_recp, a, b, m, ctx);
        if (ret <= 0) {
            printf("BN_mod_exp_recp() problems\n");
            ERR_print_errors(out);
            EXIT(1);
        }

        ret = BN_mod_exp_simple(r_simple, a, b, m, ctx);
        if (ret <= 0) {
            printf("BN_mod_exp_simple() problems\n");
            ERR_print_errors(out);
            EXIT(1);
        }

        ret = BN_mod_exp_mont_consttime(r_mont_const, a, b, m, ctx, NULL);
        if (ret <= 0) {
            printf("BN_mod_exp_mont_consttime() problems\n");
            ERR_print_errors(out);
            EXIT(1);
        }

        if (BN_cmp(r_simple, r_mont) == 0
            && BN_cmp(r_simple, r_recp) == 0
            && BN_cmp(r_simple, r_mont_const) == 0) {
            printf(".");
            fflush(stdout);
        } else {
            if (BN_cmp(r_simple, r_mont) != 0)
                printf("\nsimple and mont results differ\n");
            if (BN_cmp(r_simple, r_mont_const) != 0)
                printf("\nsimple and mont const time results differ\n");
            if (BN_cmp(r_simple, r_recp) != 0)
                printf("\nsimple and recp results differ\n");

            printf("a (%3d) = ", BN_num_bits(a));
            BN_print(out, a);
            printf("\nb (%3d) = ", BN_num_bits(b));
            BN_print(out, b);
            printf("\nm (%3d) = ", BN_num_bits(m));
            BN_print(out, m);
            printf("\nsimple   =");
            BN_print(out, r_simple);
            printf("\nrecp     =");
            BN_print(out, r_recp);
//.........这里部分代码省略.........

开发者ID:1564143452，项目名称:kbengine，代码行数:101，代码来源:exptest.c

示例18: void


//.........这里部分代码省略.........
			for (k=0; k<=n; k++)
				{
				/* obtain "SEED + offset + k" by incrementing: */
				for (i=SHA_DIGEST_LENGTH-1; i >= 0; i--)
					{
					buf[i]++;
					if (buf[i] != 0) break;
					}

				EVP_Digest(buf,SHA_DIGEST_LENGTH,md,NULL,HASH, NULL);

				/* step 8 */
				if (!BN_bin2bn(md,SHA_DIGEST_LENGTH,r0))
					goto err;
				if (!BN_lshift(r0,r0,160*k)) goto err;
				if (!BN_add(W,W,r0)) goto err;
				}

			/* more of step 8 */
			if (!BN_mask_bits(W,bits-1)) goto err;
			if (!BN_copy(X,W)) goto err;
			if (!BN_add(X,X,test)) goto err;

			/* step 9 */
			if (!BN_lshift1(r0,q)) goto err;
			if (!BN_mod(c,X,r0,ctx)) goto err;
			if (!BN_sub(r0,c,BN_value_one())) goto err;
			if (!BN_sub(p,X,r0)) goto err;

			/* step 10 */
			if (BN_cmp(p,test) >= 0)
				{
				/* step 11 */
				r = BN_is_prime_fasttest(p, DSS_prime_checks, callback, ctx3, cb_arg, 1);
				if (r > 0)
						goto end; /* found it */
				if (r != 0)
					goto err;
				}

			/* step 13 */
			counter++;
			/* "offset = offset + n + 1" */

			/* step 14 */
			if (counter >= 4096) break;
			}
		}
end:
	if (callback != NULL) callback(2,1,cb_arg);

	/* We now need to generate g */
	/* Set r0=(p-1)/q */
	if (!BN_sub(test,p,BN_value_one())) goto err;
	if (!BN_div(r0,NULL,test,q,ctx)) goto err;

	if (!BN_set_word(test,h)) goto err;
	if (!BN_MONT_CTX_set(mont,p,ctx)) goto err;

	for (;;)
		{
		/* g=test^r0%p */
		if (!BN_mod_exp_mont(g,test,r0,p,ctx,mont)) goto err;
		if (!BN_is_one(g)) break;
		if (!BN_add(test,test,BN_value_one())) goto err;
		h++;
		}

	if (callback != NULL) callback(3,1,cb_arg);

	ok=1;
err:
	if (!ok)
		{
		if (ret != NULL) DSA_free(ret);
		}
	else
		{
		ret->p=BN_dup(p);
		ret->q=BN_dup(q);
		ret->g=BN_dup(g);
		if (ret->p == NULL || ret->q == NULL || ret->g == NULL)
			{
			ok=0;
			goto err;
			}
		if ((m > 1) && (seed_in != NULL)) memcpy(seed_in,seed,20);
		if (counter_ret != NULL) *counter_ret=counter;
		if (h_ret != NULL) *h_ret=h;
		}
	if (ctx != NULL) BN_CTX_free(ctx);
	if (ctx2 != NULL)
		{
		BN_CTX_end(ctx2);
		BN_CTX_free(ctx2);
		}
	if (ctx3 != NULL) BN_CTX_free(ctx3);
	if (mont != NULL) BN_MONT_CTX_free(mont);
	return(ok?ret:NULL);
	}

开发者ID:S0043640wipro，项目名称:RiCRiPInt，代码行数:101，代码来源:dsa_gen.c

示例19: low

/* generates ElGamal key pair. returns 0 when generation went ok, and
 -1 if error occured. 'bits' is the number of bits in p; it should not
 be too low (at least 512 is recommended, 1024 is more realistic number.
 you can use precomputed p,g pairs; set bits to the ordinal of the
 precomputed combination (see table above). generator is either 2 or 5.
 public_key and secret_key will be malloc()ed and contain keys */
int eg_keypair (int bits, int generator, char **public_key, char **secret_key)
{
    BIGNUM       *p, *g, *t1, *t2, *key, *pbk;
    BN_CTX       *ctx2;
    BN_MONT_CTX  *mont;
    char         *buf1, *buf2, *buf3, *buf4, buf[8];
    int          rc;

    // create things needed for work
    ctx2 = BN_CTX_new ();         if (ctx2 == NULL) return -1;
    t1   = BN_new ();             if (t1 == NULL)   return -1;
    t2   = BN_new ();             if (t2 == NULL)   return -1;
    g    = BN_new ();             if (g == NULL)    return -1;
    key  = BN_new ();             if (key == NULL)  return -1;
    pbk  = BN_new ();             if (pbk == NULL)  return -1;
    mont = BN_MONT_CTX_new ();    if (mont == NULL) return -1;

    if (bits < 32)
    {
        if (bits > sizeof(precomp)/sizeof(precomp[0])-1) return -1;
        p = NULL;
        rc = BN_hex2bn (&p, precomp[bits].prime);
        if (rc == 0) return -1;
        // put generator into bignum
        BN_set_word (g, precomp[bits].generator);
    }
    else
    {
        // set values which will be used for checking when generating proper prime
        if (generator == 2)
        {
            BN_set_word (t1,24);
            BN_set_word (t2,11);
        }
        else if (generator == 5)
        {
            BN_set_word (t1,10);
            BN_set_word (t2,3);
            /* BN_set_word(t3,7); just have to miss
             * out on these ones :-( */
        }
        else
            goto err;
    
        // generate proper prime
        p = BN_generate_prime (NULL, bits, 1, t1, t2, NULL, NULL);
        if (p == NULL) goto err;

        // put generator into bignum
        BN_set_word (g, generator);
    }

    // create random private key
    if (!BN_rand (key, BN_num_bits (p)-1, 0, 0)) goto err;

    // create public part of the key
    BN_MONT_CTX_set (mont, p, ctx2);
    if (!BN_mod_exp_mont (pbk, g, key, p, ctx2, mont)) goto err;

    // p, g, key, pbk are ready. secret key: p,g:key, public key: p,g:pbk
    if (bits < 32)
    {
        snprintf1 (buf, sizeof(buf), "%d", bits);
        buf1 = strdup (buf);
    }
    else
    {
        buf1 = BN_bn2hex (p);
    }
    buf2 = BN_bn2hex (key);
    buf3 = BN_bn2hex (pbk);
    buf4 = BN_bn2hex (g);

    *secret_key = malloc (strlen(buf1) + strlen(buf2) + strlen(buf4) + 4);
    *public_key = malloc (strlen(buf1) + strlen(buf3) + strlen(buf4) + 4);

    strcpy (*secret_key, buf1);
    if (bits >= 32)
    {
        strcat (*secret_key, ",");
        strcat (*secret_key, buf4);
    }
    strcat (*secret_key, ":");
    strcat (*secret_key, buf2);
    
    strcpy (*public_key, buf1);
    if (bits >= 32)
    {
        strcat (*public_key, ",");
        strcat (*public_key, buf4);
    }
    strcat (*public_key, ":");
    strcat (*public_key, buf3);
    memset (buf2, 0, strlen (buf2));
//.........这里部分代码省略.........

开发者ID:OS2World，项目名称:LIB-libcrypto，代码行数:101，代码来源:elgamal.c

示例20: dh_bn_mod_exp

static int
dh_bn_mod_exp(const DH *dh, BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
    const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
{
	return BN_mod_exp_mont(r, a, p, m, ctx, m_ctx);
}

开发者ID:mosconi，项目名称:openbsd，代码行数:6，代码来源:dh_key.c

注：本文中的BN_mod_exp_mont函数示例整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。

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C++ BN_mod_exp_mont函数代码示例

示例1: witness

示例2: do_mul_exp

示例3: bn_blinding_create_param

示例4: dh_bn_mod_exp

示例5: dh_bn_mod_exp

示例6: bn_blinding_create_param

示例7: ec_field_inverse_mod_ord

示例8: BN_enhanced_miller_rabin_primality_test

示例9: test_exp_mod_zero

示例10: rsa_ossl_mod_exp

示例11: rsa_default_private_transform

示例12: dsa_builtin_paramgen

示例13: dsa_bn_mod_exp

示例14: dsa_do_verify

示例15: BN_BLINDING_new

示例16: dsa_do_verify

示例17: main

示例18: void

示例19: low

示例20: dh_bn_mod_exp

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