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C++ BN_MONT_CTX_new函数代码示例

原作者: [db:作者] 来自: [db:来源] 收藏 邀请

本文整理汇总了C++中BN_MONT_CTX_new函数的典型用法代码示例。如果您正苦于以下问题：C++ BN_MONT_CTX_new函数的具体用法？C++ BN_MONT_CTX_new怎么用？C++ BN_MONT_CTX_new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_MONT_CTX_new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: ec_precompute_mont_data

/*
 * ec_precompute_mont_data sets |group->mont_data| from |group->order| and
 * returns one on success. On error it returns zero.
 */
int ec_precompute_mont_data(EC_GROUP *group)
{
    BN_CTX *ctx = BN_CTX_new();
    int ret = 0;

    if (!EC_GROUP_VERSION(group))
        goto err;

    if (group->mont_data) {
        BN_MONT_CTX_free(group->mont_data);
        group->mont_data = NULL;
    }

    if (ctx == NULL)
        goto err;

    group->mont_data = BN_MONT_CTX_new();
    if (!group->mont_data)
        goto err;

    if (!BN_MONT_CTX_set(group->mont_data, &group->order, ctx)) {
        BN_MONT_CTX_free(group->mont_data);
        group->mont_data = NULL;
        goto err;
    }

    ret = 1;

 err:

    if (ctx)
        BN_CTX_free(ctx);
    return ret;
}
开发者ID:03050903，项目名称:godot，代码行数:38，代码来源:ec_lib.c


示例2: compute_key

static int compute_key(unsigned char *key, BIGNUM *pub_key, DH *dh)
	{
	BN_CTX ctx;
	BN_MONT_CTX *mont;
	BIGNUM *tmp;
	int ret= -1;

	BN_CTX_init(&ctx);
	BN_CTX_start(&ctx);
	tmp = BN_CTX_get(&ctx);
	
	if (dh->priv_key == NULL)
		goto err;

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

	mont=(BN_MONT_CTX *)dh->method_mont_p;
	if (!dh->meth->bn_mod_exp(dh, tmp, pub_key,
				dh->priv_key,dh->p,&ctx,mont))
		goto err;

	ret=BN_bn2bin(tmp,key);
err:
	BN_CTX_end(&ctx);
	BN_CTX_free(&ctx);
	return(ret);
	}
开发者ID:robacklin，项目名称:uclinux-linux，代码行数:32，代码来源:dh_key.c


示例3: BN_MONT_CTX_set_locked

BN_MONT_CTX *
BN_MONT_CTX_set_locked(BN_MONT_CTX **pmont, int lock, const BIGNUM *mod,
    BN_CTX *ctx)
{
	int got_write_lock = 0;
	BN_MONT_CTX *ret;

	CRYPTO_r_lock(lock);
	if (!*pmont) {
		CRYPTO_r_unlock(lock);
		CRYPTO_w_lock(lock);
		got_write_lock = 1;

		if (!*pmont) {
			ret = BN_MONT_CTX_new();
			if (ret && !BN_MONT_CTX_set(ret, mod, ctx))
				BN_MONT_CTX_free(ret);
			else
				*pmont = ret;
		}
	}

	ret = *pmont;

	if (got_write_lock)
		CRYPTO_w_unlock(lock);
	else
		CRYPTO_r_unlock(lock);

	return ret;
}
开发者ID:mr-moai-2016，项目名称:znk_project，代码行数:31，代码来源:bn_mont.c


示例4: ec_GFp_mont_group_copy

int 
ec_GFp_mont_group_copy(EC_GROUP * dest, const EC_GROUP * src)
{
	BN_MONT_CTX_free(dest->field_data1);
	dest->field_data1 = NULL;
	BN_clear_free(dest->field_data2);
	dest->field_data2 = NULL;

	if (!ec_GFp_simple_group_copy(dest, src))
		return 0;

	if (src->field_data1 != NULL) {
		dest->field_data1 = BN_MONT_CTX_new();
		if (dest->field_data1 == NULL)
			return 0;
		if (!BN_MONT_CTX_copy(dest->field_data1, src->field_data1))
			goto err;
	}
	if (src->field_data2 != NULL) {
		dest->field_data2 = BN_dup(src->field_data2);
		if (dest->field_data2 == NULL)
			goto err;
	}
	return 1;

 err:
	if (dest->field_data1 != NULL) {
		BN_MONT_CTX_free(dest->field_data1);
		dest->field_data1 = NULL;
	}
	return 0;
}
开发者ID:libressl-portable，项目名称:openbsd，代码行数:32，代码来源:ecp_mont.c


示例5: ec_precompute_mont_data

/*
 * ec_precompute_mont_data sets |group->mont_data| from |group->order| and
 * returns one on success. On error it returns zero.
 */
static int ec_precompute_mont_data(EC_GROUP *group)
{
    BN_CTX *ctx = BN_CTX_new();
    int ret = 0;

    BN_MONT_CTX_free(group->mont_data);
    group->mont_data = NULL;

    if (ctx == NULL)
        goto err;

    group->mont_data = BN_MONT_CTX_new();
    if (group->mont_data == NULL)
        goto err;

    if (!BN_MONT_CTX_set(group->mont_data, group->order, ctx)) {
        BN_MONT_CTX_free(group->mont_data);
        group->mont_data = NULL;
        goto err;
    }

    ret = 1;

 err:

    BN_CTX_free(ctx);
    return ret;
}
开发者ID:RTEMS，项目名称:rtems-libbsd，代码行数:32，代码来源:ec_lib.c


示例6: dsa_sign_setup

static int dsa_sign_setup(DSA *dsa, BN_CTX *ctx_in, BIGNUM **kinvp, BIGNUM **rp)
	{
	BN_CTX *ctx;
	BIGNUM k,*kinv=NULL,*r=NULL;
	int ret=0;

	if (!dsa->p || !dsa->q || !dsa->g)
		{
		DSAerr(DSA_F_DSA_SIGN_SETUP,DSA_R_MISSING_PARAMETERS);
		return 0;
		}
	if (ctx_in == NULL)
		{
		if ((ctx=BN_CTX_new()) == NULL) goto err;
		}
	else
		ctx=ctx_in;

	BN_init(&k);
	if ((r=BN_new()) == NULL) goto err;
	kinv=NULL;

	/* Get random k */
	do
		if (!BN_rand_range(&k, dsa->q)) goto err;
	while (BN_is_zero(&k));

	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;
		}

	/* Compute r = (g^k mod p) mod q */
	if (!dsa->meth->bn_mod_exp(dsa, r,dsa->g,&k,dsa->p,ctx,
		(BN_MONT_CTX *)dsa->method_mont_p)) goto err;
	if (!BN_mod(r,r,dsa->q,ctx)) goto err;

	/* Compute  part of 's = inv(k) (m + xr) mod q' */
	if ((kinv=BN_mod_inverse(NULL,&k,dsa->q,ctx)) == NULL) goto err;

	if (*kinvp != NULL) BN_clear_free(*kinvp);
	*kinvp=kinv;
	kinv=NULL;
	if (*rp != NULL) BN_clear_free(*rp);
	*rp=r;
	ret=1;
err:
	if (!ret)
		{
		DSAerr(DSA_F_DSA_SIGN_SETUP,ERR_R_BN_LIB);
		if (kinv != NULL) BN_clear_free(kinv);
		if (r != NULL) BN_clear_free(r);
		}
	if (ctx_in == NULL) BN_CTX_free(ctx);
	if (kinv != NULL) BN_clear_free(kinv);
	BN_clear_free(&k);
	return(ret);
	}
开发者ID:aosm，项目名称:OpenSSL096，代码行数:60，代码来源:dsa_ossl.c


示例7: ec_GFp_mont_group_copy

int ec_GFp_mont_group_copy(EC_GROUP *dest, const EC_GROUP *src) {
  BN_MONT_CTX_free(dest->mont);
  dest->mont = NULL;
  BN_clear_free(dest->one);
  dest->one = NULL;

  if (!ec_GFp_simple_group_copy(dest, src)) {
    return 0;
  }

  if (src->mont != NULL) {
    dest->mont = BN_MONT_CTX_new();
    if (dest->mont == NULL) {
      return 0;
    }
    if (!BN_MONT_CTX_copy(dest->mont, src->mont)) {
      goto err;
    }
  }
  if (src->one != NULL) {
    dest->one = BN_dup(src->one);
    if (dest->one == NULL) {
      goto err;
    }
  }

  return 1;

err:
  BN_MONT_CTX_free(dest->mont);
  dest->mont = NULL;
  return 0;
}
开发者ID:Crawping，项目名称:chromium_extract，代码行数:33，代码来源:ec_montgomery.c


示例8: BN_MONT_CTX_set_locked

int BN_MONT_CTX_set_locked(BN_MONT_CTX **pmont, CRYPTO_MUTEX *lock,
                           const BIGNUM *mod, BN_CTX *bn_ctx) {
  CRYPTO_MUTEX_lock_read(lock);
  BN_MONT_CTX *ctx = *pmont;
  CRYPTO_MUTEX_unlock_read(lock);

  if (ctx) {
    return 1;
  }

  CRYPTO_MUTEX_lock_write(lock);
  ctx = *pmont;
  if (ctx) {
    goto out;
  }

  ctx = BN_MONT_CTX_new();
  if (ctx == NULL) {
    goto out;
  }
  if (!BN_MONT_CTX_set(ctx, mod, bn_ctx)) {
    BN_MONT_CTX_free(ctx);
    ctx = NULL;
    goto out;
  }
  *pmont = ctx;

out:
  CRYPTO_MUTEX_unlock_write(lock);
  return ctx != NULL;
}
开发者ID:LiTianjue，项目名称:etls，代码行数:31，代码来源:montgomery.c


示例9: ec_GFp_mont_group_set_curve

int ec_GFp_mont_group_set_curve(EC_GROUP *group, const BIGNUM *p,
                                const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx)
{
    BN_CTX *new_ctx = NULL;
    BN_MONT_CTX *mont = NULL;
    BIGNUM *one = NULL;
    int ret = 0;

    if (group->field_data1 != NULL) {
        BN_MONT_CTX_free(group->field_data1);
        group->field_data1 = NULL;
    }
    if (group->field_data2 != NULL) {
        BN_free(group->field_data2);
        group->field_data2 = NULL;
    }

    if (ctx == NULL) {
        ctx = new_ctx = BN_CTX_new();
        if (ctx == NULL)
            return 0;
    }

    mont = BN_MONT_CTX_new();
    if (mont == NULL)
        goto err;
    if (!BN_MONT_CTX_set(mont, p, ctx)) {
        ECerr(EC_F_EC_GFP_MONT_GROUP_SET_CURVE, ERR_R_BN_LIB);
        goto err;
    }
    one = BN_new();
    if (one == NULL)
        goto err;
    if (!BN_to_montgomery(one, BN_value_one(), mont, ctx))
        goto err;

    group->field_data1 = mont;
    mont = NULL;
    group->field_data2 = one;
    one = NULL;

    ret = ec_GFp_simple_group_set_curve(group, p, a, b, ctx);

    if (!ret) {
        BN_MONT_CTX_free(group->field_data1);
        group->field_data1 = NULL;
        BN_free(group->field_data2);
        group->field_data2 = NULL;
    }

 err:
    if (new_ctx != NULL)
        BN_CTX_free(new_ctx);
    if (mont != NULL)
        BN_MONT_CTX_free(mont);
    if (one != NULL)
        BN_free(one);
    return ret;
}
开发者ID:2trill2spill，项目名称:freebsd，代码行数:59，代码来源:ecp_mont.c


示例10: generate_key

static int generate_key(DH *dh)
	{
	int ok=0;
	int generate_new_key=0;
	unsigned l;
	BN_CTX *ctx;
	BN_MONT_CTX *mont;
	BIGNUM *pub_key=NULL,*priv_key=NULL;

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

	if (dh->priv_key == NULL)
		{
		priv_key=BN_new();
		if (priv_key == NULL) goto err;
		generate_new_key=1;
		}
	else
		priv_key=dh->priv_key;

	if (dh->pub_key == NULL)
		{
		pub_key=BN_new();
		if (pub_key == NULL) goto err;
		}
	else
		pub_key=dh->pub_key;

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

	if (generate_new_key)
		{
		l = dh->length ? dh->length : BN_num_bits(dh->p)-1; /* secret exponent length */
		if (!BN_rand(priv_key, l, 0, 0)) goto err;
		}
	if (!dh->meth->bn_mod_exp(dh, pub_key, dh->g, priv_key,dh->p,ctx,mont))
		goto err;
		
	dh->pub_key=pub_key;
	dh->priv_key=priv_key;
	ok=1;
err:
	if (ok != 1)
		DHerr(DH_F_DH_GENERATE_KEY,ERR_R_BN_LIB);

	if ((pub_key != NULL)  && (dh->pub_key == NULL))  BN_free(pub_key);
	if ((priv_key != NULL) && (dh->priv_key == NULL)) BN_free(priv_key);
	BN_CTX_free(ctx);
	return(ok);
	}
开发者ID:froggatt，项目名称:edimax-br-6528n，代码行数:57，代码来源:dh_key.c


示例11: built_in_curve_scalar_field_monts_init

static void built_in_curve_scalar_field_monts_init(void) {
  unsigned num_built_in_curves;
  for (num_built_in_curves = 0;; num_built_in_curves++) {
    if (OPENSSL_built_in_curves[num_built_in_curves].nid == NID_undef) {
      break;
    }
  }

  assert(0 < num_built_in_curves);

  built_in_curve_scalar_field_monts =
      OPENSSL_malloc(sizeof(BN_MONT_CTX *) * num_built_in_curves);
  if (built_in_curve_scalar_field_monts == NULL) {
    return;
  }

  BIGNUM *order = BN_new();
  BN_CTX *bn_ctx = BN_CTX_new();
  BN_MONT_CTX *mont_ctx = NULL;

  if (bn_ctx == NULL ||
      order == NULL) {
    goto err;
  }

  unsigned i;
  for (i = 0; i < num_built_in_curves; i++) {
    const struct curve_data *curve = OPENSSL_built_in_curves[i].data;
    const unsigned param_len = curve->param_len;
    const uint8_t *params = curve->data;

    mont_ctx = BN_MONT_CTX_new();
    if (mont_ctx == NULL) {
      goto err;
    }

    if (!BN_bin2bn(params + 5 * param_len, param_len, order) ||
        !BN_MONT_CTX_set(mont_ctx, order, bn_ctx)) {
      goto err;
    }

    built_in_curve_scalar_field_monts[i] = mont_ctx;
    mont_ctx = NULL;
  }

  goto out;

err:
  BN_MONT_CTX_free(mont_ctx);
  OPENSSL_free((BN_MONT_CTX**) built_in_curve_scalar_field_monts);
  built_in_curve_scalar_field_monts = NULL;

out:
  BN_free(order);
  BN_CTX_free(bn_ctx);
}
开发者ID:Cyril2004，项目名称:proto-quic，代码行数:56，代码来源:ec.c


示例12: DEFINE_LOCAL_DATA

// built_in_curve_scalar_field_monts contains Montgomery contexts for
// performing inversions in the scalar fields of each of the built-in
// curves. It's protected by |built_in_curve_scalar_field_monts_once|.
DEFINE_LOCAL_DATA(BN_MONT_CTX **, built_in_curve_scalar_field_monts) {
  const struct built_in_curves *const curves = OPENSSL_built_in_curves();

  BN_MONT_CTX **monts =
      OPENSSL_malloc(sizeof(BN_MONT_CTX *) * OPENSSL_NUM_BUILT_IN_CURVES);
  if (monts == NULL) {
    return;
  }

  OPENSSL_memset(monts, 0, sizeof(BN_MONT_CTX *) * OPENSSL_NUM_BUILT_IN_CURVES);

  BIGNUM *order = BN_new();
  BN_CTX *bn_ctx = BN_CTX_new();
  BN_MONT_CTX *mont_ctx = NULL;

  if (bn_ctx == NULL ||
      order == NULL) {
    goto err;
  }

  for (size_t i = 0; i < OPENSSL_NUM_BUILT_IN_CURVES; i++) {
    const struct built_in_curve *curve = &curves->curves[i];
    const unsigned param_len = curve->param_len;
    const uint8_t *params = curve->params;

    mont_ctx = BN_MONT_CTX_new();
    if (mont_ctx == NULL) {
      goto err;
    }

    if (!BN_bin2bn(params + 5 * param_len, param_len, order) ||
        !BN_MONT_CTX_set(mont_ctx, order, bn_ctx)) {
      goto err;
    }

    monts[i] = mont_ctx;
    mont_ctx = NULL;
  }

  *out = monts;
  goto done;

err:
  BN_MONT_CTX_free(mont_ctx);
  for (size_t i = 0; i < OPENSSL_NUM_BUILT_IN_CURVES; i++) {
    BN_MONT_CTX_free(monts[i]);
  }
  OPENSSL_free((BN_MONT_CTX**) monts);

done:
  BN_free(order);
  BN_CTX_free(bn_ctx);
}
开发者ID:dseerapu，项目名称:workmanager，代码行数:56，代码来源:ec.c


示例13: ec_GFp_mont_group_set_curve

int ec_GFp_mont_group_set_curve(EC_GROUP *group, const BIGNUM *p,
                                const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx) {
  BN_CTX *new_ctx = NULL;
  BN_MONT_CTX *mont = NULL;
  BIGNUM *one = NULL;
  int ret = 0;

  BN_MONT_CTX_free(group->mont);
  group->mont = NULL;
  BN_free(group->one);
  group->one = NULL;

  if (ctx == NULL) {
    ctx = new_ctx = BN_CTX_new();
    if (ctx == NULL) {
      return 0;
    }
  }

  mont = BN_MONT_CTX_new();
  if (mont == NULL) {
    goto err;
  }
  if (!BN_MONT_CTX_set(mont, p, ctx)) {
    OPENSSL_PUT_ERROR(EC, ERR_R_BN_LIB);
    goto err;
  }
  one = BN_new();
  if (one == NULL || !BN_to_montgomery(one, BN_value_one(), mont, ctx)) {
    goto err;
  }

  group->mont = mont;
  mont = NULL;
  group->one = one;
  one = NULL;

  ret = ec_GFp_simple_group_set_curve(group, p, a, b, ctx);

  if (!ret) {
    BN_MONT_CTX_free(group->mont);
    group->mont = NULL;
    BN_free(group->one);
    group->one = NULL;
  }

err:
  BN_CTX_free(new_ctx);
  BN_MONT_CTX_free(mont);
  BN_free(one);
  return ret;
}
开发者ID:Crawping，项目名称:chromium_extract，代码行数:52，代码来源:ec_montgomery.c


示例14: generate_key

static int generate_key(DH *dh)
	{
	int ok=0;
	BN_CTX ctx;
	BN_MONT_CTX *mont;
	BIGNUM *pub_key=NULL,*priv_key=NULL;

	BN_CTX_init(&ctx);

	if (dh->priv_key == NULL)
		{
		priv_key=BN_new();
		if (priv_key == NULL) goto err;
		do
			if (!BN_rand_range(priv_key, dh->p)) goto err;
		while (BN_is_zero(priv_key));
		}
	else
		priv_key=dh->priv_key;

	if (dh->pub_key == NULL)
		{
		pub_key=BN_new();
		if (pub_key == NULL) goto err;
		}
	else
		pub_key=dh->pub_key;

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

	if (!dh->meth->bn_mod_exp(dh, pub_key,dh->g,priv_key,dh->p,&ctx,mont))
								goto err;
		
	dh->pub_key=pub_key;
	dh->priv_key=priv_key;
	ok=1;
err:
	if (ok != 1)
		DHerr(DH_F_DH_GENERATE_KEY,ERR_R_BN_LIB);

	if ((pub_key != NULL)  && (dh->pub_key == NULL))  BN_free(pub_key);
	if ((priv_key != NULL) && (dh->priv_key == NULL)) BN_free(priv_key);
	BN_CTX_free(&ctx);
	return(ok);
	}
开发者ID:unofficial-opensource-apple，项目名称:Security，代码行数:51，代码来源:dh_key.c


示例15: CRYPTO_w_lock

BN_MONT_CTX *BN_MONT_CTX_set_locked(BN_MONT_CTX **pmont, int lock,
					const BIGNUM *mod, BN_CTX *ctx)
	{
	if (*pmont)
		return *pmont;
	CRYPTO_w_lock(lock);
	if (!*pmont)
		{
		BN_MONT_CTX *mtmp;
		mtmp = BN_MONT_CTX_new();
		if (mtmp && !BN_MONT_CTX_set(mtmp, mod, ctx))
			BN_MONT_CTX_free(mtmp);
		else
			*pmont = mtmp;
		}
	CRYPTO_w_unlock(lock);
	return *pmont;
	}
开发者ID:appleorange1，项目名称:asus-rt-n12-lx，代码行数:18，代码来源:bn_mont.c


示例16: CRYPTO_w_lock

BN_MONT_CTX *BN_MONT_CTX_set_locked(BN_MONT_CTX **pmont, int lock,
					const BIGNUM *mod, BN_CTX *ctx)
	{
	if (*pmont)
		return *pmont;
	CRYPTO_w_lock(lock);
	if (!*pmont)
		{
		*pmont = BN_MONT_CTX_new();
		if (*pmont && !BN_MONT_CTX_set(*pmont, mod, ctx))
			{
			BN_MONT_CTX_free(*pmont);
			*pmont = NULL;
			}
		}
	CRYPTO_w_unlock(lock);
	return *pmont;
	}
开发者ID:niubl，项目名称:camera_project，代码行数:18，代码来源:bn_mont.c


示例17: CRYPTO_r_lock

BN_MONT_CTX *BN_MONT_CTX_set_locked(BN_MONT_CTX **pmont, int lock,
					const BIGNUM *mod, BN_CTX *ctx)
	{
	BN_MONT_CTX *ret;

	CRYPTO_r_lock(lock);
	ret = *pmont;
	CRYPTO_r_unlock(lock);
	if (ret)
		return ret;

	/* We don't want to serialise globally while doing our lazy-init math in
	 * BN_MONT_CTX_set. That punishes threads that are doing independent
	 * things. Instead, punish the case where more than one thread tries to
	 * lazy-init the same 'pmont', by having each do the lazy-init math work
	 * independently and only use the one from the thread that wins the race
	 * (the losers throw away the work they've done). */
	ret = BN_MONT_CTX_new();
	if (!ret)
		return NULL;
	if (!BN_MONT_CTX_set(ret, mod, ctx))
		{
		BN_MONT_CTX_free(ret);
		return NULL;
		}

	/* The locked compare-and-set, after the local work is done. */
	CRYPTO_w_lock(lock);
	if (*pmont)
		{
		BN_MONT_CTX_free(ret);
		ret = *pmont;
		}
	else
		*pmont = ret;
	CRYPTO_w_unlock(lock);
	return ret;
	}
开发者ID:AdrianaPineda，项目名称:openssl，代码行数:38，代码来源:bn_mont.c


示例18: compute_key

static int compute_key(unsigned char *key, const BIGNUM *pub_key, DH *dh)
	{
	BN_CTX *ctx;
	BN_MONT_CTX *mont;
	BIGNUM *tmp;
	int ret= -1;

	ctx = BN_CTX_new();
	if (ctx == NULL) goto err;
	BN_CTX_start(ctx);
	tmp = BN_CTX_get(ctx);
	
	if (dh->priv_key == NULL)
		{
		DHerr(DH_F_DH_COMPUTE_KEY,DH_R_NO_PRIVATE_VALUE);
		goto err;
		}
	if ((dh->method_mont_p == NULL) && (dh->flags & DH_FLAG_CACHE_MONT_P))
		{
		if ((dh->method_mont_p=(char *)BN_MONT_CTX_new()) != NULL)
			if (!BN_MONT_CTX_set((BN_MONT_CTX *)dh->method_mont_p,
				dh->p,ctx)) goto err;
		}

	mont=(BN_MONT_CTX *)dh->method_mont_p;
	if (!dh->meth->bn_mod_exp(dh, tmp, pub_key, dh->priv_key,dh->p,ctx,mont))
		{
		DHerr(DH_F_DH_COMPUTE_KEY,ERR_R_BN_LIB);
		goto err;
		}

	ret=BN_bn2bin(tmp,key);
err:
	BN_CTX_end(ctx);
	BN_CTX_free(ctx);
	return(ret);
	}
开发者ID:froggatt，项目名称:edimax-br-6528n，代码行数:37，代码来源:dh_key.c


示例19: BN_is_prime_fasttest

int BN_is_prime_fasttest(const BIGNUM *a, int checks,
		void (*callback)(int,int,void *),
		BN_CTX *ctx_passed, void *cb_arg,
		int do_trial_division)
	{
	int i, j, ret = -1;
	int k;
	BN_CTX *ctx = NULL;
	BIGNUM *A1, *A1_odd, *check; /* taken from ctx */
	BN_MONT_CTX *mont = NULL;
	const BIGNUM *A = NULL;

	if (BN_cmp(a, BN_value_one()) <= 0)
		return 0;
	
	if (checks == BN_prime_checks)
		checks = BN_prime_checks_for_size(BN_num_bits(a));

	/* first look for small factors */
	if (!BN_is_odd(a))
		return 0;
	if (do_trial_division)
		{
		for (i = 1; i < NUMPRIMES; i++)
			if (BN_mod_word(a, primes[i]) == 0) 
				return 0;
		if (callback != NULL) callback(1, -1, cb_arg);
		}

	if (ctx_passed != NULL)
		ctx = ctx_passed;
	else
		if ((ctx=BN_CTX_new()) == NULL)
			goto err;
	BN_CTX_start(ctx);

	/* A := abs(a) */
	if (a->neg)
		{
		BIGNUM *t;
		if ((t = BN_CTX_get(ctx)) == NULL) goto err;
		BN_copy(t, a);
		t->neg = 0;
		A = t;
		}
	else
		A = a;
	A1 = BN_CTX_get(ctx);
	A1_odd = BN_CTX_get(ctx);
	check = BN_CTX_get(ctx);
	if (check == NULL) goto err;

	/* compute A1 := A - 1 */
	if (!BN_copy(A1, A))
		goto err;
	if (!BN_sub_word(A1, 1))
		goto err;
	if (BN_is_zero(A1))
		{
		ret = 0;
		goto err;
		}

	/* write  A1  as  A1_odd * 2^k */
	k = 1;
	while (!BN_is_bit_set(A1, k))
		k++;
	if (!BN_rshift(A1_odd, A1, k))
		goto err;

	/* Montgomery setup for computations mod A */
	mont = BN_MONT_CTX_new();
	if (mont == NULL)
		goto err;
	if (!BN_MONT_CTX_set(mont, A, ctx))
		goto err;
	
	for (i = 0; i < checks; i++)
		{
		if (!BN_pseudo_rand_range(check, A1))
			goto err;
		if (!BN_add_word(check, 1))
			goto err;
		/* now 1 <= check < A */

		j = witness(check, A, A1, A1_odd, k, ctx, mont);
		if (j == -1) goto err;
		if (j)
			{
			ret=0;
			goto err;
			}
		if (callback != NULL) callback(1,i,cb_arg);
		}
	ret=1;
err:
	if (ctx != NULL)
		{
		BN_CTX_end(ctx);
		if (ctx_passed == NULL)
//.........这里部分代码省略.........
开发者ID:xyzy，项目名称:mips-openssl_0.9.7，代码行数:101，代码来源:bn_prime.c


示例20: FuzzerTestOneInput

int FuzzerTestOneInput(const uint8_t *buf, size_t len) {
    int success = 0;
    static BN_CTX *ctx;
    static BN_MONT_CTX *mont;
    static BIGNUM *b1;
    static BIGNUM *b2;
    static BIGNUM *b3;
    static BIGNUM *b4;
    static BIGNUM *b5;

    if (ctx == NULL) {
        b1 = BN_new();
        b2 = BN_new();
        b3 = BN_new();
        b4 = BN_new();
        b5 = BN_new();
        ctx = BN_CTX_new();
        mont = BN_MONT_CTX_new();
    }
    // Divide the input into three parts, using the values of the first two
    // bytes to choose lengths, which generate b1, b2 and b3. Use three bits
    // of the third byte to choose signs for the three numbers.
    size_t l1 = 0, l2 = 0, l3 = 0;
    int s1 = 0, s2 = 0, s3 = 0;
    if (len > 2) {
        len -= 3;
        l1 = (buf[0] * len) / 255;
        ++buf;
        l2 = (buf[0] * (len - l1)) / 255;
        ++buf;
        l3 = len - l1 - l2;

        s1 = buf[0] & 1;
        s2 = buf[0] & 2;
        s3 = buf[0] & 4;
        ++buf;
    }
    OPENSSL_assert(BN_bin2bn(buf, l1, b1) == b1);
    BN_set_negative(b1, s1);
    OPENSSL_assert(BN_bin2bn(buf + l1, l2, b2) == b2);
    BN_set_negative(b2, s2);
    OPENSSL_assert(BN_bin2bn(buf + l1 + l2, l3, b3) == b3);
    BN_set_negative(b3, s3);

    // mod 0 is undefined
    if (BN_is_zero(b3)) {
        success = 1;
        goto done;
    }

    OPENSSL_assert(BN_mod_exp(b4, b1, b2, b3, ctx));
    OPENSSL_assert(BN_mod_exp_simple(b5, b1, b2, b3, ctx));

    success = BN_cmp(b4, b5) == 0;
    if (!success) {
        BN_print_fp(stdout, b1);
        putchar('\n');
        BN_print_fp(stdout, b2);
        putchar('\n');
        BN_print_fp(stdout, b3);
        putchar('\n');
        BN_print_fp(stdout, b4);
        putchar('\n');
        BN_print_fp(stdout, b5);
        putchar('\n');
    }

 done:
    OPENSSL_assert(success);

    return 0;
}
开发者ID:1234-，项目名称:openssl，代码行数:72，代码来源:bignum.c



注：本文中的BN_MONT_CTX_new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_MONT_CTX_set函数代码示例发布时间：2022-05-30
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