C++ BN_CTX_free函数代码示例

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

static int dsa_sign_setup(DSA *dsa, BN_CTX *ctx_in, BIGNUM **kinvp, BIGNUM **rp)
	{
	BN_CTX *ctx;
	BIGNUM k,kq,*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;
		}

	BN_init(&k);
	BN_init(&kq);

	if (ctx_in == NULL)
		{
		if ((ctx=BN_CTX_new()) == NULL) goto err;
		}
	else
		ctx=ctx_in;

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

	/* Get random k */
	do
		if (!BN_rand_range(&k, dsa->q)) goto err;
	while (BN_is_zero(&k));
	if ((dsa->flags & DSA_FLAG_NO_EXP_CONSTTIME) == 0)
		{
		BN_set_flags(&k, BN_FLG_CONSTTIME);
		}

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

	/* Compute r = (g^k mod p) mod q */

	if ((dsa->flags & DSA_FLAG_NO_EXP_CONSTTIME) == 0)
		{
		if (!BN_copy(&kq, &k)) goto err;

		/* We do not want timing information to leak the length of k,
		 * so we compute g^k using an equivalent exponent of fixed length.
		 *
		 * (This is a kludge that we need because the BN_mod_exp_mont()
		 * does not let us specify the desired timing behaviour.) */

		if (!BN_add(&kq, &kq, dsa->q)) goto err;
		if (BN_num_bits(&kq) <= BN_num_bits(dsa->q))
			{
			if (!BN_add(&kq, &kq, dsa->q)) goto err;
			}

		K = &kq;
		}
	else
		{
		K = &k;
		}
	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);
	BN_clear_free(&kq);
	return(ret);
	}

开发者ID:alisw，项目名称:alice-openssl，代码行数:91，代码来源:fips_dsa_ossl.c

示例2: ecdsa_do_verify


//.........这里部分代码省略.........
	if (!X)
	{
		ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ERR_R_BN_LIB);
		goto err;
	}
	
	if (!EC_GROUP_get_order(group, order, ctx))
	{
		ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ERR_R_EC_LIB);
		goto err;
	}

	if (BN_is_zero(sig->r)          || BN_is_negative(sig->r) || 
	    BN_ucmp(sig->r, order) >= 0 || BN_is_zero(sig->s)  ||
	    BN_is_negative(sig->s)      || BN_ucmp(sig->s, order) >= 0)
	{
		ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ECDSA_R_BAD_SIGNATURE);
		ret = 0;	/* signature is invalid */
		goto err;
	}
	/* calculate tmp1 = inv(S) mod order */
	if (!BN_mod_inverse(u2, sig->s, order, ctx))
	{
		ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ERR_R_BN_LIB);
		goto err;
	}
	/* digest -> m */
	i = BN_num_bits(order);
	/* Need to truncate digest if it is too long: first truncate whole
	 * bytes.
	 */
	if (8 * dgst_len > i)
		dgst_len = (i + 7)/8;
	if (!BN_bin2bn(dgst, dgst_len, m))
	{
		ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ERR_R_BN_LIB);
		goto err;
	}
	/* If still too long truncate remaining bits with a shift */
	if ((8 * dgst_len > i) && !BN_rshift(m, m, 8 - (i & 0x7)))
	{
		ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ERR_R_BN_LIB);
		goto err;
	}
	/* u1 = m * tmp mod order */
	if (!BN_mod_mul(u1, m, u2, order, ctx))
	{
		ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ERR_R_BN_LIB);
		goto err;
	}
	/* u2 = r * w mod q */
	if (!BN_mod_mul(u2, sig->r, u2, order, ctx))
	{
		ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ERR_R_BN_LIB);
		goto err;
	}

	if ((point = EC_POINT_new(group)) == NULL)
	{
		ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ERR_R_MALLOC_FAILURE);
		goto err;
	}
	if (!EC_POINT_mul(group, point, u1, pub_key, u2, ctx))
	{
		ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ERR_R_EC_LIB);
		goto err;
	}
	if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) == NID_X9_62_prime_field)
	{
		if (!EC_POINT_get_affine_coordinates_GFp(group,
			point, X, NULL, ctx))
		{
			ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ERR_R_EC_LIB);
			goto err;
		}
	}
#ifndef OPENSSL_NO_EC2M
	else /* NID_X9_62_characteristic_two_field */
	{
		if (!EC_POINT_get_affine_coordinates_GF2m(group,
			point, X, NULL, ctx))
		{
			ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ERR_R_EC_LIB);
			goto err;
		}
	}
#endif	
	if (!BN_nnmod(u1, X, order, ctx))
	{
		ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ERR_R_BN_LIB);
		goto err;
	}
	/*  if the signature is correct u1 is equal to sig->r */
	ret = (BN_ucmp(u1, sig->r) == 0);
err:
	BN_CTX_end(ctx);
	BN_CTX_free(ctx);
	EC_POINT_free(point);
	return ret;
}

开发者ID:Basskrapfen，项目名称:openbsd，代码行数:101，代码来源:ecs_ossl.c

示例3: ECDSA_SIG_recover_key_GFp

// Perform ECDSA key recovery (see SEC1 4.1.6) for curves over (mod p)-fields
// recid selects which key is recovered
// if check is nonzero, additional checks are performed
int ECDSA_SIG_recover_key_GFp(EC_KEY *eckey, ECDSA_SIG *ecsig, const unsigned char *msg, int msglen, int recid, int check)
{
    if (!eckey) return 0;

    int ret = 0;
    BN_CTX *ctx = NULL;

    BIGNUM *x = NULL;
    BIGNUM *e = NULL;
    BIGNUM *order = NULL;
    BIGNUM *sor = NULL;
    BIGNUM *eor = NULL;
    BIGNUM *field = NULL;
    EC_POINT *R = NULL;
    EC_POINT *O = NULL;
    EC_POINT *Q = NULL;
    BIGNUM *rr = NULL;
    BIGNUM *zero = NULL;
    int n = 0;
    int i = recid / 2;

    const EC_GROUP *group = EC_KEY_get0_group(eckey);
    if ((ctx = BN_CTX_new()) == NULL) { ret = -1; goto err; }
    BN_CTX_start(ctx);
    order = BN_CTX_get(ctx);
    if (!EC_GROUP_get_order(group, order, ctx)) { ret = -2; goto err; }
    x = BN_CTX_get(ctx);
    if (!BN_copy(x, order)) { ret=-1; goto err; }
    if (!BN_mul_word(x, i)) { ret=-1; goto err; }
    if (!BN_add(x, x, ecsig->r)) { ret=-1; goto err; }
    field = BN_CTX_get(ctx);
    if (!EC_GROUP_get_curve_GFp(group, field, NULL, NULL, ctx)) { ret=-2; goto err; }
    if (BN_cmp(x, field) >= 0) { ret=0; goto err; }
    if ((R = EC_POINT_new(group)) == NULL) { ret = -2; goto err; }
    if (!EC_POINT_set_compressed_coordinates_GFp(group, R, x, recid % 2, ctx)) { ret=0; goto err; }
    if (check)
    {
        if ((O = EC_POINT_new(group)) == NULL) { ret = -2; goto err; }
        if (!EC_POINT_mul(group, O, NULL, R, order, ctx)) { ret=-2; goto err; }
        if (!EC_POINT_is_at_infinity(group, O)) { ret = 0; goto err; }
    }
    if ((Q = EC_POINT_new(group)) == NULL) { ret = -2; goto err; }
    n = EC_GROUP_get_degree(group);
    e = BN_CTX_get(ctx);
    if (!BN_bin2bn(msg, msglen, e)) { ret=-1; goto err; }
    if (8*msglen > n) BN_rshift(e, e, 8-(n & 7));
    zero = BN_CTX_get(ctx);
    if (!BN_zero(zero)) { ret=-1; goto err; }
    if (!BN_mod_sub(e, zero, e, order, ctx)) { ret=-1; goto err; }
    rr = BN_CTX_get(ctx);
    if (!BN_mod_inverse(rr, ecsig->r, order, ctx)) { ret=-1; goto err; }
    sor = BN_CTX_get(ctx);
    if (!BN_mod_mul(sor, ecsig->s, rr, order, ctx)) { ret=-1; goto err; }
    eor = BN_CTX_get(ctx);
    if (!BN_mod_mul(eor, e, rr, order, ctx)) { ret=-1; goto err; }
    if (!EC_POINT_mul(group, Q, eor, R, sor, ctx)) { ret=-2; goto err; }
    if (!EC_KEY_set_public_key(eckey, Q)) { ret=-2; goto err; }

    ret = 1;

err:
    if (ctx) {
        BN_CTX_end(ctx);
        BN_CTX_free(ctx);
    }
    if (R != NULL) EC_POINT_free(R);
    if (O != NULL) EC_POINT_free(O);
    if (Q != NULL) EC_POINT_free(Q);
    return ret;
}

开发者ID:CaptChadd，项目名称:BBQCoin，代码行数:73，代码来源:key.cpp

示例4: BN_generate_prime_ex

int BN_generate_prime_ex(BIGNUM *ret, int bits, int safe,
	const BIGNUM *add, const BIGNUM *rem, BN_GENCB *cb)
	{
	BIGNUM *t;
	int found=0;
	int i,j,c1=0;
	BN_CTX *ctx;
	int checks = BN_prime_checks_for_size(bits);

	ctx=BN_CTX_new();
	if (ctx == NULL) goto err;
	BN_CTX_start(ctx);
	t = BN_CTX_get(ctx);
	if(!t) goto err;
loop: 
	/* make a random number and set the top and bottom bits */
	if (add == NULL)
		{
		if (!probable_prime(ret,bits)) goto err;
		}
	else
		{
		if (safe)
			{
			if (!probable_prime_dh_safe(ret,bits,add,rem,ctx))
				 goto err;
			}
		else
			{
			if (!probable_prime_dh(ret,bits,add,rem,ctx))
				goto err;
			}
		}
	/* if (BN_mod_word(ret,(BN_ULONG)3) == 1) goto loop; */
	if(!BN_GENCB_call(cb, 0, c1++))
		/* aborted */
		goto err;

	if (!safe)
		{
		i=BN_is_prime_fasttest_ex(ret,checks,ctx,0,cb);
		if (i == -1) goto err;
		if (i == 0) goto loop;
		}
	else
		{
		/* for "safe prime" generation,
		 * check that (p-1)/2 is prime.
		 * Since a prime is odd, We just
		 * need to divide by 2 */
		if (!BN_rshift1(t,ret)) goto err;

		for (i=0; i<checks; i++)
			{
			j=BN_is_prime_fasttest_ex(ret,1,ctx,0,cb);
			if (j == -1) goto err;
			if (j == 0) goto loop;

			j=BN_is_prime_fasttest_ex(t,1,ctx,0,cb);
			if (j == -1) goto err;
			if (j == 0) goto loop;

			if(!BN_GENCB_call(cb, 2, c1-1))
				goto err;
			/* We have a safe prime test pass */
			}
		}
	/* we have a prime :-) */
	found = 1;
err:
	if (ctx != NULL)
		{
		BN_CTX_end(ctx);
		BN_CTX_free(ctx);
		}
	bn_check_top(ret);
	return found;
	}

开发者ID:futuretekinc，项目名称:u-boot-1.22，代码行数:78，代码来源:bn_prime.c

示例5: ec_GF2m_simple_add

/* Computes a + b and stores the result in r.  r could be a or b, a could be b.
 * Uses algorithm A.10.2 of IEEE P1363.
 */
int ec_GF2m_simple_add(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, const EC_POINT *b, BN_CTX *ctx)
	{
	BN_CTX *new_ctx = NULL;
	BIGNUM *x0, *y0, *x1, *y1, *x2, *y2, *s, *t;
	int ret = 0;
	
	if (EC_POINT_is_at_infinity(group, a))
		{
		if (!EC_POINT_copy(r, b)) return 0;
		return 1;
		}

	if (EC_POINT_is_at_infinity(group, b))
		{
		if (!EC_POINT_copy(r, a)) return 0;
		return 1;
		}

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

	BN_CTX_start(ctx);
	x0 = BN_CTX_get(ctx);
	y0 = BN_CTX_get(ctx);
	x1 = BN_CTX_get(ctx);
	y1 = BN_CTX_get(ctx);
	x2 = BN_CTX_get(ctx);
	y2 = BN_CTX_get(ctx);
	s = BN_CTX_get(ctx);
	t = BN_CTX_get(ctx);
	if (t == NULL) goto err;

	if (a->Z_is_one) 
		{
		if (!BN_copy(x0, &a->X)) goto err;
		if (!BN_copy(y0, &a->Y)) goto err;
		}
	else
		{
		if (!EC_POINT_get_affine_coordinates_GF2m(group, a, x0, y0, ctx)) goto err;
		}
	if (b->Z_is_one) 
		{
		if (!BN_copy(x1, &b->X)) goto err;
		if (!BN_copy(y1, &b->Y)) goto err;
		}
	else
		{
		if (!EC_POINT_get_affine_coordinates_GF2m(group, b, x1, y1, ctx)) goto err;
		}


	if (BN_GF2m_cmp(x0, x1))
		{
		if (!BN_GF2m_add(t, x0, x1)) goto err;
		if (!BN_GF2m_add(s, y0, y1)) goto err;
		if (!group->meth->field_div(group, s, s, t, ctx)) goto err;
		if (!group->meth->field_sqr(group, x2, s, ctx)) goto err;
		if (!BN_GF2m_add(x2, x2, &group->a)) goto err;
		if (!BN_GF2m_add(x2, x2, s)) goto err;
		if (!BN_GF2m_add(x2, x2, t)) goto err;
		}
	else
		{
		if (BN_GF2m_cmp(y0, y1) || BN_is_zero(x1))
			{
			if (!EC_POINT_set_to_infinity(group, r)) goto err;
			ret = 1;
			goto err;
			}
		if (!group->meth->field_div(group, s, y1, x1, ctx)) goto err;
		if (!BN_GF2m_add(s, s, x1)) goto err;
		
		if (!group->meth->field_sqr(group, x2, s, ctx)) goto err;
		if (!BN_GF2m_add(x2, x2, s)) goto err;
		if (!BN_GF2m_add(x2, x2, &group->a)) goto err;
		}

	if (!BN_GF2m_add(y2, x1, x2)) goto err;
	if (!group->meth->field_mul(group, y2, y2, s, ctx)) goto err;
	if (!BN_GF2m_add(y2, y2, x2)) goto err;
	if (!BN_GF2m_add(y2, y2, y1)) goto err;

	if (!EC_POINT_set_affine_coordinates_GF2m(group, r, x2, y2, ctx)) goto err;

	ret = 1;

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

开发者ID:002301，项目名称:node，代码行数:100，代码来源:ec2_smpl.c

示例6: ECPKParameters_print


//.........这里部分代码省略.........

        buf_len = (size_t)BN_num_bytes(p);
        if (buf_len < (i = (size_t)BN_num_bytes(a)))
            buf_len = i;
        if (buf_len < (i = (size_t)BN_num_bytes(b)))
            buf_len = i;
        if (buf_len < (i = (size_t)BN_num_bytes(gen)))
            buf_len = i;
        if (buf_len < (i = (size_t)BN_num_bytes(order)))
            buf_len = i;
        if (buf_len < (i = (size_t)BN_num_bytes(cofactor)))
            buf_len = i;

        if ((seed = EC_GROUP_get0_seed(x)) != NULL)
            seed_len = EC_GROUP_get_seed_len(x);

        buf_len += 10;
        if ((buffer = OPENSSL_malloc(buf_len)) == NULL) {
            reason = ERR_R_MALLOC_FAILURE;
            goto err;
        }

        if (!BIO_indent(bp, off, 128))
            goto err;

        /* print the 'short name' of the field type */
        if (BIO_printf(bp, "Field Type: %s\n", OBJ_nid2sn(tmp_nid))
            <= 0)
            goto err;

        if (is_char_two) {
            /* print the 'short name' of the base type OID */
            int basis_type = EC_GROUP_get_basis_type(x);
            if (basis_type == 0)
                goto err;

            if (!BIO_indent(bp, off, 128))
                goto err;

            if (BIO_printf(bp, "Basis Type: %s\n",
                           OBJ_nid2sn(basis_type)) <= 0)
                goto err;

            /* print the polynomial */
            if ((p != NULL) && !ASN1_bn_print(bp, "Polynomial:", p, buffer,
                                              off))
                goto err;
        } else {
            if ((p != NULL) && !ASN1_bn_print(bp, "Prime:", p, buffer, off))
                goto err;
        }
        if ((a != NULL) && !ASN1_bn_print(bp, "A:   ", a, buffer, off))
            goto err;
        if ((b != NULL) && !ASN1_bn_print(bp, "B:   ", b, buffer, off))
            goto err;
        if (form == POINT_CONVERSION_COMPRESSED) {
            if ((gen != NULL) && !ASN1_bn_print(bp, gen_compressed, gen,
                                                buffer, off))
                goto err;
        } else if (form == POINT_CONVERSION_UNCOMPRESSED) {
            if ((gen != NULL) && !ASN1_bn_print(bp, gen_uncompressed, gen,
                                                buffer, off))
                goto err;
        } else {                /* form == POINT_CONVERSION_HYBRID */

            if ((gen != NULL) && !ASN1_bn_print(bp, gen_hybrid, gen,
                                                buffer, off))
                goto err;
        }
        if ((order != NULL) && !ASN1_bn_print(bp, "Order: ", order,
                                              buffer, off))
            goto err;
        if ((cofactor != NULL) && !ASN1_bn_print(bp, "Cofactor: ", cofactor,
                                                 buffer, off))
            goto err;
        if (seed && !print_bin(bp, "Seed:", seed, seed_len, off))
            goto err;
    }
    ret = 1;
 err:
    if (!ret)
        ECerr(EC_F_ECPKPARAMETERS_PRINT, reason);
    if (p)
        BN_free(p);
    if (a)
        BN_free(a);
    if (b)
        BN_free(b);
    if (gen)
        BN_free(gen);
    if (order)
        BN_free(order);
    if (cofactor)
        BN_free(cofactor);
    if (ctx)
        BN_CTX_free(ctx);
    if (buffer != NULL)
        OPENSSL_free(buffer);
    return (ret);
}

开发者ID:1Project，项目名称:SafeBoardMessenger，代码行数:101，代码来源:eck_prn.c

示例7: RSA_check_key_ex


//.........这里部分代码省略.........
            goto err;
        }
        if (!BN_mul(l, l, k, ctx)) {
            ret = -1;
            goto err;
        }
        if (!BN_gcd(m, m, k, ctx)) {
            ret = -1;
            goto err;
        }
    }
    if (!BN_div(k, NULL, l, m, ctx)) { /* remainder is 0 */
        ret = -1;
        goto err;
    }
    if (!BN_mod_mul(i, key->d, key->e, k, ctx)) {
        ret = -1;
        goto err;
    }

    if (!BN_is_one(i)) {
        ret = 0;
        RSAerr(RSA_F_RSA_CHECK_KEY_EX, RSA_R_D_E_NOT_CONGRUENT_TO_1);
    }

    if (key->dmp1 != NULL && key->dmq1 != NULL && key->iqmp != NULL) {
        /* dmp1 = d mod (p-1)? */
        if (!BN_sub(i, key->p, BN_value_one())) {
            ret = -1;
            goto err;
        }
        if (!BN_mod(j, key->d, i, ctx)) {
            ret = -1;
            goto err;
        }
        if (BN_cmp(j, key->dmp1) != 0) {
            ret = 0;
            RSAerr(RSA_F_RSA_CHECK_KEY_EX, RSA_R_DMP1_NOT_CONGRUENT_TO_D);
        }

        /* dmq1 = d mod (q-1)? */
        if (!BN_sub(i, key->q, BN_value_one())) {
            ret = -1;
            goto err;
        }
        if (!BN_mod(j, key->d, i, ctx)) {
            ret = -1;
            goto err;
        }
        if (BN_cmp(j, key->dmq1) != 0) {
            ret = 0;
            RSAerr(RSA_F_RSA_CHECK_KEY_EX, RSA_R_DMQ1_NOT_CONGRUENT_TO_D);
        }

        /* iqmp = q^-1 mod p? */
        if (!BN_mod_inverse(i, key->q, key->p, ctx)) {
            ret = -1;
            goto err;
        }
        if (BN_cmp(i, key->iqmp) != 0) {
            ret = 0;
            RSAerr(RSA_F_RSA_CHECK_KEY_EX, RSA_R_IQMP_NOT_INVERSE_OF_Q);
        }
    }

    for (idx = 0; idx < ex_primes; idx++) {
        pinfo = sk_RSA_PRIME_INFO_value(key->prime_infos, idx);
        /* d_i = d mod (r_i - 1)? */
        if (!BN_sub(i, pinfo->r, BN_value_one())) {
            ret = -1;
            goto err;
        }
        if (!BN_mod(j, key->d, i, ctx)) {
            ret = -1;
            goto err;
        }
        if (BN_cmp(j, pinfo->d) != 0) {
            ret = 0;
            RSAerr(RSA_F_RSA_CHECK_KEY_EX, RSA_R_MP_EXPONENT_NOT_CONGRUENT_TO_D);
        }
        /* t_i = R_i ^ -1 mod r_i ? */
        if (!BN_mod_inverse(i, pinfo->pp, pinfo->r, ctx)) {
            ret = -1;
            goto err;
        }
        if (BN_cmp(i, pinfo->t) != 0) {
            ret = 0;
            RSAerr(RSA_F_RSA_CHECK_KEY_EX, RSA_R_MP_COEFFICIENT_NOT_INVERSE_OF_R);
        }
    }

 err:
    BN_free(i);
    BN_free(j);
    BN_free(k);
    BN_free(l);
    BN_free(m);
    BN_CTX_free(ctx);
    return ret;
}

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

示例8: ec_GFp_simple_add


//.........这里部分代码省略.........

  /* n5, n6 */
  if (!BN_mod_sub_quick(n5, n1, n3, p) ||
      !BN_mod_sub_quick(n6, n2, n4, p)) {
    goto end;
  }
  /* n5 = n1 - n3 */
  /* n6 = n2 - n4 */

  if (BN_is_zero(n5)) {
    if (BN_is_zero(n6)) {
      /* a is the same point as b */
      BN_CTX_end(ctx);
      ret = EC_POINT_dbl(group, r, a, ctx);
      ctx = NULL;
      goto end;
    } else {
      /* a is the inverse of b */
      BN_zero(&r->Z);
      ret = 1;
      goto end;
    }
  }

  /* 'n7', 'n8' */
  if (!BN_mod_add_quick(n1, n1, n3, p) ||
      !BN_mod_add_quick(n2, n2, n4, p)) {
    goto end;
  }
  /* 'n7' = n1 + n3 */
  /* 'n8' = n2 + n4 */

  /* Z_r */
  if (a_Z_is_one && b_Z_is_one) {
    if (!BN_copy(&r->Z, n5)) {
      goto end;
    }
  } else {
    if (a_Z_is_one) {
      if (!BN_copy(n0, &b->Z)) {
        goto end;
      }
    } else if (b_Z_is_one) {
      if (!BN_copy(n0, &a->Z)) {
        goto end;
      }
    } else if (!field_mul(group, n0, &a->Z, &b->Z, ctx)) {
      goto end;
    }
    if (!field_mul(group, &r->Z, n0, n5, ctx)) {
      goto end;
    }
  }

  /* Z_r = Z_a * Z_b * n5 */

  /* X_r */
  if (!field_sqr(group, n0, n6, ctx) ||
      !field_sqr(group, n4, n5, ctx) ||
      !field_mul(group, n3, n1, n4, ctx) ||
      !BN_mod_sub_quick(&r->X, n0, n3, p)) {
    goto end;
  }
  /* X_r = n6^2 - n5^2 * 'n7' */

  /* 'n9' */
  if (!BN_mod_lshift1_quick(n0, &r->X, p) ||
      !BN_mod_sub_quick(n0, n3, n0, p)) {
    goto end;
  }
  /* n9 = n5^2 * 'n7' - 2 * X_r */

  /* Y_r */
  if (!field_mul(group, n0, n0, n6, ctx) ||
      !field_mul(group, n5, n4, n5, ctx)) {
    goto end; /* now n5 is n5^3 */
  }
  if (!field_mul(group, n1, n2, n5, ctx) ||
      !BN_mod_sub_quick(n0, n0, n1, p)) {
    goto end;
  }
  if (BN_is_odd(n0) && !BN_add(n0, n0, p)) {
    goto end;
  }
  /* now  0 <= n0 < 2*p,  and n0 is even */
  if (!BN_rshift1(&r->Y, n0)) {
    goto end;
  }
  /* Y_r = (n6 * 'n9' - 'n8' * 'n5^3') / 2 */

  ret = 1;

end:
  if (ctx) {
    /* otherwise we already called BN_CTX_end */
    BN_CTX_end(ctx);
  }
  BN_CTX_free(new_ctx);
  return ret;
}

开发者ID:garfieldonly，项目名称:boringssl，代码行数:101，代码来源:simple.c

示例9: ec_GFp_simple_dbl


//.........这里部分代码省略.........
  }

  BN_CTX_start(ctx);
  n0 = BN_CTX_get(ctx);
  n1 = BN_CTX_get(ctx);
  n2 = BN_CTX_get(ctx);
  n3 = BN_CTX_get(ctx);
  if (n3 == NULL) {
    goto err;
  }

  /* Note that in this function we must not read components of 'a'
   * once we have written the corresponding components of 'r'.
   * ('r' might the same as 'a'.)
   */

  /* n1 */
  if (BN_cmp(&a->Z, &group->one) == 0) {
    if (!field_sqr(group, n0, &a->X, ctx) ||
        !BN_mod_lshift1_quick(n1, n0, p) ||
        !BN_mod_add_quick(n0, n0, n1, p) ||
        !BN_mod_add_quick(n1, n0, &group->a, p)) {
      goto err;
    }
    /* n1 = 3 * X_a^2 + a_curve */
  } else if (group->a_is_minus3) {
    if (!field_sqr(group, n1, &a->Z, ctx) ||
        !BN_mod_add_quick(n0, &a->X, n1, p) ||
        !BN_mod_sub_quick(n2, &a->X, n1, p) ||
        !field_mul(group, n1, n0, n2, ctx) ||
        !BN_mod_lshift1_quick(n0, n1, p) ||
        !BN_mod_add_quick(n1, n0, n1, p)) {
      goto err;
    }
    /* n1 = 3 * (X_a + Z_a^2) * (X_a - Z_a^2)
     *    = 3 * X_a^2 - 3 * Z_a^4 */
  } else {
    if (!field_sqr(group, n0, &a->X, ctx) ||
        !BN_mod_lshift1_quick(n1, n0, p) ||
        !BN_mod_add_quick(n0, n0, n1, p) ||
        !field_sqr(group, n1, &a->Z, ctx) ||
        !field_sqr(group, n1, n1, ctx) ||
        !field_mul(group, n1, n1, &group->a, ctx) ||
        !BN_mod_add_quick(n1, n1, n0, p)) {
      goto err;
    }
    /* n1 = 3 * X_a^2 + a_curve * Z_a^4 */
  }

  /* Z_r */
  if (BN_cmp(&a->Z, &group->one) == 0) {
    if (!BN_copy(n0, &a->Y)) {
      goto err;
    }
  } else if (!field_mul(group, n0, &a->Y, &a->Z, ctx)) {
    goto err;
  }
  if (!BN_mod_lshift1_quick(&r->Z, n0, p)) {
    goto err;
  }
  /* Z_r = 2 * Y_a * Z_a */

  /* n2 */
  if (!field_sqr(group, n3, &a->Y, ctx) ||
      !field_mul(group, n2, &a->X, n3, ctx) ||
      !BN_mod_lshift_quick(n2, n2, 2, p)) {
    goto err;
  }
  /* n2 = 4 * X_a * Y_a^2 */

  /* X_r */
  if (!BN_mod_lshift1_quick(n0, n2, p) ||
      !field_sqr(group, &r->X, n1, ctx) ||
      !BN_mod_sub_quick(&r->X, &r->X, n0, p)) {
    goto err;
  }
  /* X_r = n1^2 - 2 * n2 */

  /* n3 */
  if (!field_sqr(group, n0, n3, ctx) ||
      !BN_mod_lshift_quick(n3, n0, 3, p)) {
    goto err;
  }
  /* n3 = 8 * Y_a^4 */

  /* Y_r */
  if (!BN_mod_sub_quick(n0, n2, &r->X, p) ||
      !field_mul(group, n0, n1, n0, ctx) ||
      !BN_mod_sub_quick(&r->Y, n0, n3, p)) {
    goto err;
  }
  /* Y_r = n1 * (n2 - X_r) - n3 */

  ret = 1;

err:
  BN_CTX_end(ctx);
  BN_CTX_free(new_ctx);
  return ret;
}

开发者ID:garfieldonly，项目名称:boringssl，代码行数:101，代码来源:simple.c

示例10: ec_GFp_simple_group_set_curve

int ec_GFp_simple_group_set_curve(EC_GROUP *group, const BIGNUM *p,
                                  const BIGNUM *a, const BIGNUM *b,
                                  BN_CTX *ctx) {
  int ret = 0;
  BN_CTX *new_ctx = NULL;
  BIGNUM *tmp_a;

  /* p must be a prime > 3 */
  if (BN_num_bits(p) <= 2 || !BN_is_odd(p)) {
    OPENSSL_PUT_ERROR(EC, EC_R_INVALID_FIELD);
    return 0;
  }

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

  BN_CTX_start(ctx);
  tmp_a = BN_CTX_get(ctx);
  if (tmp_a == NULL) {
    goto err;
  }

  /* group->field */
  if (!BN_copy(&group->field, p)) {
    goto err;
  }
  BN_set_negative(&group->field, 0);

  /* group->a */
  if (!BN_nnmod(tmp_a, a, p, ctx)) {
    goto err;
  }
  if (group->meth->field_encode) {
    if (!group->meth->field_encode(group, &group->a, tmp_a, ctx)) {
      goto err;
    }
  } else if (!BN_copy(&group->a, tmp_a)) {
    goto err;
  }

  /* group->b */
  if (!BN_nnmod(&group->b, b, p, ctx)) {
    goto err;
  }
  if (group->meth->field_encode &&
      !group->meth->field_encode(group, &group->b, &group->b, ctx)) {
    goto err;
  }

  /* group->a_is_minus3 */
  if (!BN_add_word(tmp_a, 3)) {
    goto err;
  }
  group->a_is_minus3 = (0 == BN_cmp(tmp_a, &group->field));

  if (group->meth->field_encode != NULL) {
    if (!group->meth->field_encode(group, &group->one, BN_value_one(), ctx)) {
      goto err;
    }
  } else if (!BN_copy(&group->one, BN_value_one())) {
    goto err;
  }

  ret = 1;

err:
  BN_CTX_end(ctx);
  BN_CTX_free(new_ctx);
  return ret;
}

开发者ID:garfieldonly，项目名称:boringssl，代码行数:74，代码来源:simple.c

示例11: ec_GFp_simple_point_get_affine_coordinates

int ec_GFp_simple_point_get_affine_coordinates(const EC_GROUP *group,
                                               const EC_POINT *point, BIGNUM *x,
                                               BIGNUM *y, BN_CTX *ctx) {
  BN_CTX *new_ctx = NULL;
  BIGNUM *Z, *Z_1, *Z_2, *Z_3;
  const BIGNUM *Z_;
  int ret = 0;

  if (EC_POINT_is_at_infinity(group, point)) {
    OPENSSL_PUT_ERROR(EC, EC_R_POINT_AT_INFINITY);
    return 0;
  }

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

  BN_CTX_start(ctx);
  Z = BN_CTX_get(ctx);
  Z_1 = BN_CTX_get(ctx);
  Z_2 = BN_CTX_get(ctx);
  Z_3 = BN_CTX_get(ctx);
  if (Z == NULL || Z_1 == NULL || Z_2 == NULL || Z_3 == NULL) {
    goto err;
  }

  /* transform  (X, Y, Z)  into  (x, y) := (X/Z^2, Y/Z^3) */

  if (group->meth->field_decode) {
    if (!group->meth->field_decode(group, Z, &point->Z, ctx)) {
      goto err;
    }
    Z_ = Z;
  } else {
    Z_ = &point->Z;
  }

  if (BN_is_one(Z_)) {
    if (group->meth->field_decode) {
      if (x != NULL && !group->meth->field_decode(group, x, &point->X, ctx)) {
        goto err;
      }
      if (y != NULL && !group->meth->field_decode(group, y, &point->Y, ctx)) {
        goto err;
      }
    } else {
      if (x != NULL && !BN_copy(x, &point->X)) {
        goto err;
      }
      if (y != NULL && !BN_copy(y, &point->Y)) {
        goto err;
      }
    }
  } else {
    if (!BN_mod_inverse(Z_1, Z_, &group->field, ctx)) {
      OPENSSL_PUT_ERROR(EC, ERR_R_BN_LIB);
      goto err;
    }

    if (group->meth->field_encode == 0) {
      /* field_sqr works on standard representation */
      if (!group->meth->field_sqr(group, Z_2, Z_1, ctx)) {
        goto err;
      }
    } else if (!BN_mod_sqr(Z_2, Z_1, &group->field, ctx)) {
      goto err;
    }

    /* in the Montgomery case, field_mul will cancel out Montgomery factor in
     * X: */
    if (x != NULL && !group->meth->field_mul(group, x, &point->X, Z_2, ctx)) {
      goto err;
    }

    if (y != NULL) {
      if (group->meth->field_encode == 0) {
        /* field_mul works on standard representation */
        if (!group->meth->field_mul(group, Z_3, Z_2, Z_1, ctx)) {
          goto err;
        }
      } else if (!BN_mod_mul(Z_3, Z_2, Z_1, &group->field, ctx)) {
        goto err;
      }

      /* in the Montgomery case, field_mul will cancel out Montgomery factor in
       * Y: */
      if (!group->meth->field_mul(group, y, &point->Y, Z_3, ctx)) {
        goto err;
      }
    }
  }

  ret = 1;

err:
  BN_CTX_end(ctx);
  BN_CTX_free(new_ctx);
//.........这里部分代码省略.........

开发者ID:garfieldonly，项目名称:boringssl，代码行数:101，代码来源:simple.c

示例12: ec_GFp_simple_points_make_affine


//.........这里部分代码省略.........
  if (!BN_is_zero(&points[0]->Z)) {
    if (!BN_copy(prod_Z[0], &points[0]->Z)) {
      goto err;
    }
  } else {
    if (BN_copy(prod_Z[0], &group->one) == NULL) {
      goto err;
    }
  }

  for (i = 1; i < num; i++) {
    if (!BN_is_zero(&points[i]->Z)) {
      if (!group->meth->field_mul(group, prod_Z[i], prod_Z[i - 1],
                                  &points[i]->Z, ctx)) {
        goto err;
      }
    } else {
      if (!BN_copy(prod_Z[i], prod_Z[i - 1])) {
        goto err;
      }
    }
  }

  /* Now use a single explicit inversion to replace every
   * non-zero points[i]->Z by its inverse. */

  if (!BN_mod_inverse(tmp, prod_Z[num - 1], &group->field, ctx)) {
    OPENSSL_PUT_ERROR(EC, ERR_R_BN_LIB);
    goto err;
  }

  if (group->meth->field_encode != NULL) {
    /* In the Montgomery case, we just turned R*H (representing H)
     * into 1/(R*H), but we need R*(1/H) (representing 1/H);
     * i.e. we need to multiply by the Montgomery factor twice. */
    if (!group->meth->field_encode(group, tmp, tmp, ctx) ||
        !group->meth->field_encode(group, tmp, tmp, ctx)) {
      goto err;
    }
  }

  for (i = num - 1; i > 0; --i) {
    /* Loop invariant: tmp is the product of the inverses of
     * points[0]->Z .. points[i]->Z (zero-valued inputs skipped). */
    if (BN_is_zero(&points[i]->Z)) {
      continue;
    }

    /* Set tmp_Z to the inverse of points[i]->Z (as product
     * of Z inverses 0 .. i, Z values 0 .. i - 1). */
    if (!group->meth->field_mul(group, tmp_Z, prod_Z[i - 1], tmp, ctx) ||
        /* Update tmp to satisfy the loop invariant for i - 1. */
        !group->meth->field_mul(group, tmp, tmp, &points[i]->Z, ctx) ||
        /* Replace points[i]->Z by its inverse. */
        !BN_copy(&points[i]->Z, tmp_Z)) {
      goto err;
    }
  }

  /* Replace points[0]->Z by its inverse. */
  if (!BN_is_zero(&points[0]->Z) && !BN_copy(&points[0]->Z, tmp)) {
    goto err;
  }

  /* Finally, fix up the X and Y coordinates for all points. */
  for (i = 0; i < num; i++) {
    EC_POINT *p = points[i];

    if (!BN_is_zero(&p->Z)) {
      /* turn (X, Y, 1/Z) into (X/Z^2, Y/Z^3, 1). */
      if (!group->meth->field_sqr(group, tmp, &p->Z, ctx) ||
          !group->meth->field_mul(group, &p->X, &p->X, tmp, ctx) ||
          !group->meth->field_mul(group, tmp, tmp, &p->Z, ctx) ||
          !group->meth->field_mul(group, &p->Y, &p->Y, tmp, ctx)) {
        goto err;
      }

      if (BN_copy(&p->Z, &group->one) == NULL) {
        goto err;
      }
    }
  }

  ret = 1;

err:
  BN_CTX_end(ctx);
  BN_CTX_free(new_ctx);
  if (prod_Z != NULL) {
    for (i = 0; i < num; i++) {
      if (prod_Z[i] == NULL) {
        break;
      }
      BN_clear_free(prod_Z[i]);
    }
    OPENSSL_free(prod_Z);
  }

  return ret;
}

开发者ID:garfieldonly，项目名称:boringssl，代码行数:101，代码来源:simple.c

示例13: dsa_priv_decode

static int dsa_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8)
	{
	const unsigned char *p, *pm;
	int pklen, pmlen;
	int ptype;
	void *pval;
	ASN1_STRING *pstr;
	X509_ALGOR *palg;
	ASN1_INTEGER *privkey = NULL;
	BN_CTX *ctx = NULL;

	STACK_OF(ASN1_TYPE) *ndsa = NULL;
	DSA *dsa = NULL;

	if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8))
		return 0;
	X509_ALGOR_get0(NULL, &ptype, &pval, palg);

	/* Check for broken DSA PKCS#8, UGH! */
	if (*p == (V_ASN1_SEQUENCE|V_ASN1_CONSTRUCTED))
		{
		ASN1_TYPE *t1, *t2;
	    	if(!(ndsa = d2i_ASN1_SEQUENCE_ANY(NULL, &p, pklen)))
			goto decerr;
		if (sk_ASN1_TYPE_num(ndsa) != 2)
			goto decerr;
		/* Handle Two broken types:
	    	 * SEQUENCE {parameters, priv_key}
		 * SEQUENCE {pub_key, priv_key}
		 */

		t1 = sk_ASN1_TYPE_value(ndsa, 0);
		t2 = sk_ASN1_TYPE_value(ndsa, 1);
		if (t1->type == V_ASN1_SEQUENCE)
			{
			p8->broken = PKCS8_EMBEDDED_PARAM;
			pval = t1->value.ptr;
			}
		else if (ptype == V_ASN1_SEQUENCE)
			p8->broken = PKCS8_NS_DB;
		else
			goto decerr;

		if (t2->type != V_ASN1_INTEGER)
			goto decerr;

		privkey = t2->value.integer;
		}
	else
		{
		const unsigned char *q = p;
		if (!(privkey=d2i_ASN1_INTEGER(NULL, &p, pklen)))
			goto decerr;
		if (privkey->type == V_ASN1_NEG_INTEGER)
			{
			p8->broken = PKCS8_NEG_PRIVKEY;
			ASN1_INTEGER_free(privkey);
			if (!(privkey=d2i_ASN1_UINTEGER(NULL, &q, pklen)))
				goto decerr;
			}
		if (ptype != V_ASN1_SEQUENCE)
			goto decerr;
		}

	pstr = pval;	
	pm = pstr->data;
	pmlen = pstr->length;
	if (!(dsa = d2i_DSAparams(NULL, &pm, pmlen)))
		goto decerr;
	/* We have parameters now set private key */
	if (!(dsa->priv_key = ASN1_INTEGER_to_BN(privkey, NULL)))
		{
		DSAerr(DSA_F_DSA_PRIV_DECODE,DSA_R_BN_ERROR);
		goto dsaerr;
		}
	/* Calculate public key */
	if (!(dsa->pub_key = BN_new()))
		{
		DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
		goto dsaerr;
		}
	if (!(ctx = BN_CTX_new()))
		{
		DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
		goto dsaerr;
		}
			
	if (!BN_mod_exp(dsa->pub_key, dsa->g, dsa->priv_key, dsa->p, ctx))
		{
		DSAerr(DSA_F_DSA_PRIV_DECODE,DSA_R_BN_ERROR);
		goto dsaerr;
		}

	EVP_PKEY_assign_DSA(pkey, dsa);
	BN_CTX_free (ctx);
	if(ndsa)
		sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
	else
		ASN1_INTEGER_free(privkey);

//.........这里部分代码省略.........

开发者ID:002301，项目名称:node，代码行数:101，代码来源:dsa_ameth.c

示例14: dsa_do_verify


//.........这里部分代码省略.........
	    {
	    FIPSerr(FIPS_F_DSA_DO_VERIFY,FIPS_R_FIPS_SELFTEST_FAILED);
	    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;
		}

	if (FIPS_mode() && (BN_num_bits(dsa->p) < OPENSSL_DSA_FIPS_MIN_MODULUS_BITS))
		{
		DSAerr(DSA_F_DSA_DO_VERIFY, DSA_R_KEY_SIZE_TOO_SMALL);
		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);
	return(ret);
	}

开发者ID:alisw，项目名称:alice-openssl，代码行数:101，代码来源:fips_dsa_ossl.c

示例15: EC_KEY_print

int EC_KEY_print(BIO *bp, const EC_KEY *x, int off)
	{
	unsigned char *buffer=NULL;
	size_t	buf_len=0, i;
	int     ret=0, reason=ERR_R_BIO_LIB;
	BIGNUM  *pub_key=NULL, *order=NULL;
	BN_CTX  *ctx=NULL;
	const EC_GROUP *group;
	const EC_POINT *public_key;
	const BIGNUM *priv_key;
 
	if (x == NULL || (group = EC_KEY_get0_group(x)) == NULL)
		{
		reason = ERR_R_PASSED_NULL_PARAMETER;
		goto err;
		}

	public_key = EC_KEY_get0_public_key(x);
	if ((pub_key = EC_POINT_point2bn(group, public_key,
		EC_KEY_get_conv_form(x), NULL, ctx)) == NULL)
		{
		reason = ERR_R_EC_LIB;
		goto err;
		}

	buf_len = (size_t)BN_num_bytes(pub_key);
	priv_key = EC_KEY_get0_private_key(x);
	if (priv_key != NULL)
		{
		if ((i = (size_t)BN_num_bytes(priv_key)) > buf_len)
			buf_len = i;
		}

	buf_len += 10;
	if ((buffer = OPENSSL_malloc(buf_len)) == NULL)
		{
		reason = ERR_R_MALLOC_FAILURE;
		goto err;
		}

	if (priv_key != NULL)
		{
		if (!BIO_indent(bp, off, 128))
			goto err;
		if ((order = BN_new()) == NULL)
			goto err;
		if (!EC_GROUP_get_order(group, order, NULL))
			goto err;
		if (BIO_printf(bp, "Private-Key: (%d bit)\n", 
			BN_num_bits(order)) <= 0) goto err;
		}
  
	if ((priv_key != NULL) && !print(bp, "priv:", priv_key, 
		buffer, off))
		goto err;
	if ((pub_key != NULL) && !print(bp, "pub: ", pub_key,
		buffer, off))
		goto err;
	if (!ECPKParameters_print(bp, group, off))
		goto err;
	ret=1;
err:
	if (!ret)
 		ECerr(EC_F_EC_KEY_PRINT, reason);
	if (pub_key) 
		BN_free(pub_key);
	if (order)
		BN_free(order);
	if (ctx)
		BN_CTX_free(ctx);
	if (buffer != NULL)
		OPENSSL_free(buffer);
	return(ret);
	}

开发者ID:RafaelRMachado，项目名称:MinnowBoard，代码行数:74，代码来源:t_pkey.c

示例16: ec_GFp_simple_is_on_curve

int ec_GFp_simple_is_on_curve(const EC_GROUP *group, const EC_POINT *point,
                              BN_CTX *ctx) {
  int (*field_mul)(const EC_GROUP *, BIGNUM *, const BIGNUM *, const BIGNUM *,
                   BN_CTX *);
  int (*field_sqr)(const EC_GROUP *, BIGNUM *, const BIGNUM *, BN_CTX *);
  const BIGNUM *p;
  BN_CTX *new_ctx = NULL;
  BIGNUM *rh, *tmp, *Z4, *Z6;
  int ret = 0;

  if (EC_POINT_is_at_infinity(group, point)) {
    return 1;
  }

  field_mul = group->meth->field_mul;
  field_sqr = group->meth->field_sqr;
  p = &group->field;

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

  BN_CTX_start(ctx);
  rh = BN_CTX_get(ctx);
  tmp = BN_CTX_get(ctx);
  Z4 = BN_CTX_get(ctx);
  Z6 = BN_CTX_get(ctx);
  if (Z6 == NULL) {
    goto err;
  }

  /* We have a curve defined by a Weierstrass equation
   *      y^2 = x^3 + a*x + b.
   * The point to consider is given in Jacobian projective coordinates
   * where  (X, Y, Z)  represents  (x, y) = (X/Z^2, Y/Z^3).
   * Substituting this and multiplying by  Z^6  transforms the above equation
   * into
   *      Y^2 = X^3 + a*X*Z^4 + b*Z^6.
   * To test this, we add up the right-hand side in 'rh'.
   */

  /* rh := X^2 */
  if (!field_sqr(group, rh, &point->X, ctx)) {
    goto err;
  }

  if (BN_cmp(&point->Z, &group->one) != 0) {
    if (!field_sqr(group, tmp, &point->Z, ctx) ||
        !field_sqr(group, Z4, tmp, ctx) ||
        !field_mul(group, Z6, Z4, tmp, ctx)) {
      goto err;
    }

    /* rh := (rh + a*Z^4)*X */
    if (group->a_is_minus3) {
      if (!BN_mod_lshift1_quick(tmp, Z4, p) ||
          !BN_mod_add_quick(tmp, tmp, Z4, p) ||
          !BN_mod_sub_quick(rh, rh, tmp, p) ||
          !field_mul(group, rh, rh, &point->X, ctx)) {
        goto err;
      }
    } else {
      if (!field_mul(group, tmp, Z4, &group->a, ctx) ||
          !BN_mod_add_quick(rh, rh, tmp, p) ||
          !field_mul(group, rh, rh, &point->X, ctx)) {
        goto err;
      }
    }

    /* rh := rh + b*Z^6 */
    if (!field_mul(group, tmp, &group->b, Z6, ctx) ||
        !BN_mod_add_quick(rh, rh, tmp, p)) {
      goto err;
    }
  } else {
    /* rh := (rh + a)*X */
    if (!BN_mod_add_quick(rh, rh, &group->a, p) ||
        !field_mul(group, rh, rh, &point->X, ctx)) {
      goto err;
    }
    /* rh := rh + b */
    if (!BN_mod_add_quick(rh, rh, &group->b, p)) {
      goto err;
    }
  }

  /* 'lh' := Y^2 */
  if (!field_sqr(group, tmp, &point->Y, ctx)) {
    goto err;
  }

  ret = (0 == BN_ucmp(tmp, rh));

err:
  BN_CTX_end(ctx);
  BN_CTX_free(new_ctx);
  return ret;
//.........这里部分代码省略.........

开发者ID:garfieldonly，项目名称:boringssl，代码行数:101，代码来源:simple.c

示例17: ec_GF2m_simple_mul

/*-
 * Computes the sum
 *     scalar*group->generator + scalars[0]*points[0] + ... + scalars[num-1]*points[num-1]
 * gracefully ignoring NULL scalar values.
 */
int ec_GF2m_simple_mul(const EC_GROUP *group, EC_POINT *r,
                       const BIGNUM *scalar, size_t num,
                       const EC_POINT *points[], const BIGNUM *scalars[],
                       BN_CTX *ctx)
{
    BN_CTX *new_ctx = NULL;
    int ret = 0;
    size_t i;
    EC_POINT *p = NULL;
    EC_POINT *acc = NULL;

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

    /*
     * This implementation is more efficient than the wNAF implementation for
     * 2 or fewer points.  Use the ec_wNAF_mul implementation for 3 or more
     * points, or if we can perform a fast multiplication based on
     * precomputation.
     */
    if ((scalar && (num > 1)) || (num > 2)
        || (num == 0 && EC_GROUP_have_precompute_mult(group))) {
        ret = ec_wNAF_mul(group, r, scalar, num, points, scalars, ctx);
        goto err;
    }

    if ((p = EC_POINT_new(group)) == N

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C++ BN_CTX_free函数代码示例

示例1: dsa_sign_setup

示例2: ecdsa_do_verify

示例3: ECDSA_SIG_recover_key_GFp

示例4: BN_generate_prime_ex

示例5: ec_GF2m_simple_add

示例6: ECPKParameters_print

示例7: RSA_check_key_ex

示例8: ec_GFp_simple_add

示例9: ec_GFp_simple_dbl

示例10: ec_GFp_simple_group_set_curve

示例11: ec_GFp_simple_point_get_affine_coordinates

示例12: ec_GFp_simple_points_make_affine

示例13: dsa_priv_decode

示例14: dsa_do_verify

示例15: EC_KEY_print

示例16: ec_GFp_simple_is_on_curve

示例17: ec_GF2m_simple_mul

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