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C++ BN_MONT_CTX_set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_set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_set函数的具体用法？C++ BN_MONT_CTX_set怎么用？C++ BN_MONT_CTX_set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_set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: 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2: 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3: 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4: 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.
 */
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6: 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7: 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8: 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9: 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10: 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11: 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12: 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13: 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14: 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_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17: 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18: 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19: BN_is_prime_fasttest_ex

int BN_is_prime_fasttest_ex(const BIGNUM *a, int checks, BN_CTX *ctx_passed,
                            int do_trial_division, BN_GENCB *cb)
{
    int i, j, ret = -1;
    int k;
    BN_CTX *ctx = NULL;
    BIGNUM *A1, *A1_odd, *check; /* taken from ctx */
    BN_MONT_CTX *mont = 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))
        /* a is even => a is prime if and only if a == 2 */
        return BN_is_word(a, 2);
    if (do_trial_division) {
        for (i = 1; i < NUMPRIMES; i++) {
            BN_ULONG mod = BN_mod_word(a, primes[i]);
            if (mod == (BN_ULONG)-1)
                goto err;
            if (mod == 0)
                return BN_is_word(a, primes[i]);
        }
        if (!BN_GENCB_call(cb, 1, -1))
            goto err;
    }

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

    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_priv_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 (!BN_GENCB_call(cb, 1, i))
            goto err;
    }
    ret = 1;
 err:
    if (ctx != NULL) {
        BN_CTX_end(ctx);
        if (ctx_passed == NULL)
            BN_CTX_free(ctx);
    }
    BN_MONT_CTX_free(mont);

    return ret;
}
开发者ID:Bilibili，项目名称:openssl，代码行数:95，代码来源:bn_prime.c


示例20: 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



注：本文中的BN_MONT_CTX_set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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