Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libcrypto/crypto/../../libssl/src/crypto/ec/ec_ameth.c	Lines:	27	275	9.8 %
Date:	2016-12-06	Branches:	9	149	6.0 %


/* $OpenBSD: ec_ameth.c,v 1.16 2015/02/11 04:05:14 beck Exp $ */
/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
 * project 2006.
 */
/* ====================================================================
 * Copyright (c) 2006 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    licensing@OpenSSL.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */

#include <stdio.h>

#include <openssl/opensslconf.h>

#include <openssl/bn.h>
#include <openssl/ec.h>
#include <openssl/err.h>
#include <openssl/x509.h>

#ifndef OPENSSL_NO_CMS
#include <openssl/cms.h>
#endif

#include "asn1_locl.h"

static int
eckey_param2type(int *pptype, void **ppval, EC_KEY * ec_key)
{
	const EC_GROUP *group;
	int nid;
	if (ec_key == NULL || (group = EC_KEY_get0_group(ec_key)) == NULL) {
		ECerr(EC_F_ECKEY_PARAM2TYPE, EC_R_MISSING_PARAMETERS);
		return 0;
	}
	if (EC_GROUP_get_asn1_flag(group) &&
	    (nid = EC_GROUP_get_curve_name(group))) {
		/* we have a 'named curve' => just set the OID */
		*ppval = OBJ_nid2obj(nid);
		*pptype = V_ASN1_OBJECT;
	} else {
		/* explicit parameters */
		ASN1_STRING *pstr = NULL;
		pstr = ASN1_STRING_new();
		if (!pstr)
			return 0;
		pstr->length = i2d_ECParameters(ec_key, &pstr->data);
		if (pstr->length <= 0) {
			ASN1_STRING_free(pstr);
			ECerr(EC_F_ECKEY_PARAM2TYPE, ERR_R_EC_LIB);
			return 0;
		}
		*ppval = pstr;
		*pptype = V_ASN1_SEQUENCE;
	}
	return 1;
}

static int
eckey_pub_encode(X509_PUBKEY * pk, const EVP_PKEY * pkey)
{
	EC_KEY *ec_key = pkey->pkey.ec;
	void *pval = NULL;
	int ptype;
	unsigned char *penc = NULL, *p;
	int penclen;

	if (!eckey_param2type(&ptype, &pval, ec_key)) {
		ECerr(EC_F_ECKEY_PUB_ENCODE, ERR_R_EC_LIB);
		return 0;
	}
	penclen = i2o_ECPublicKey(ec_key, NULL);
	if (penclen <= 0)
		goto err;
	penc = malloc(penclen);
	if (!penc)
		goto err;
	p = penc;
	penclen = i2o_ECPublicKey(ec_key, &p);
	if (penclen <= 0)
		goto err;
	if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_EC),
		ptype, pval, penc, penclen))
		return 1;
err:
	if (ptype == V_ASN1_OBJECT)
		ASN1_OBJECT_free(pval);
	else
		ASN1_STRING_free(pval);
	free(penc);
	return 0;
}

static EC_KEY *
eckey_type2param(int ptype, void *pval)
{
	EC_KEY *eckey = NULL;

	if (ptype == V_ASN1_SEQUENCE) {
		ASN1_STRING *pstr = pval;
		const unsigned char *pm = NULL;
		int pmlen;

		pm = pstr->data;
		pmlen = pstr->length;
		if (!(eckey = d2i_ECParameters(NULL, &pm, pmlen))) {
			ECerr(EC_F_ECKEY_TYPE2PARAM, EC_R_DECODE_ERROR);
			goto ecerr;
		}
	} else if (ptype == V_ASN1_OBJECT) {
		ASN1_OBJECT *poid = pval;
		EC_GROUP *group;

		/*
		 * type == V_ASN1_OBJECT => the parameters are given by an
		 * asn1 OID
		 */
		if ((eckey = EC_KEY_new()) == NULL) {
			ECerr(EC_F_ECKEY_TYPE2PARAM, ERR_R_MALLOC_FAILURE);
			goto ecerr;
		}
		group = EC_GROUP_new_by_curve_name(OBJ_obj2nid(poid));
		if (group == NULL)
			goto ecerr;
		EC_GROUP_set_asn1_flag(group, OPENSSL_EC_NAMED_CURVE);
		if (EC_KEY_set_group(eckey, group) == 0)
			goto ecerr;
		EC_GROUP_free(group);
	} else {
		ECerr(EC_F_ECKEY_TYPE2PARAM, EC_R_DECODE_ERROR);
		goto ecerr;
	}

	return eckey;

ecerr:
	if (eckey)
		EC_KEY_free(eckey);
	return NULL;
}

static int
eckey_pub_decode(EVP_PKEY * pkey, X509_PUBKEY * pubkey)
{
	const unsigned char *p = NULL;
	void *pval;
	int ptype, pklen;
	EC_KEY *eckey = NULL;
	X509_ALGOR *palg;

	if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey))
		return 0;
	X509_ALGOR_get0(NULL, &ptype, &pval, palg);

	eckey = eckey_type2param(ptype, pval);

	if (!eckey) {
		ECerr(EC_F_ECKEY_PUB_DECODE, ERR_R_EC_LIB);
		return 0;
	}
	/* We have parameters now set public key */
	if (!o2i_ECPublicKey(&eckey, &p, pklen)) {
		ECerr(EC_F_ECKEY_PUB_DECODE, EC_R_DECODE_ERROR);
		goto ecerr;
	}
	EVP_PKEY_assign_EC_KEY(pkey, eckey);
	return 1;

ecerr:
	if (eckey)
		EC_KEY_free(eckey);
	return 0;
}

static int
eckey_pub_cmp(const EVP_PKEY * a, const EVP_PKEY * b)
{
	int r;
	const EC_GROUP *group = EC_KEY_get0_group(b->pkey.ec);
	const EC_POINT *pa = EC_KEY_get0_public_key(a->pkey.ec), *pb = EC_KEY_get0_public_key(b->pkey.ec);

	r = EC_POINT_cmp(group, pa, pb, NULL);
	if (r == 0)
		return 1;
	if (r == 1)
		return 0;
	return -2;
}

static int
eckey_priv_decode(EVP_PKEY * pkey, PKCS8_PRIV_KEY_INFO * p8)
{
	const unsigned char *p = NULL;
	void *pval;
	int ptype, pklen;
	EC_KEY *eckey = NULL;
	X509_ALGOR *palg;

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

	eckey = eckey_type2param(ptype, pval);

	if (!eckey)
		goto ecliberr;

	/* We have parameters now set private key */
	if (!d2i_ECPrivateKey(&eckey, &p, pklen)) {
		ECerr(EC_F_ECKEY_PRIV_DECODE, EC_R_DECODE_ERROR);
		goto ecerr;
	}
	/* calculate public key (if necessary) */
	if (EC_KEY_get0_public_key(eckey) == NULL) {
		const BIGNUM *priv_key;
		const EC_GROUP *group;
		EC_POINT *pub_key;
		/*
		 * the public key was not included in the SEC1 private key =>
		 * calculate the public key
		 */
		group = EC_KEY_get0_group(eckey);
		pub_key = EC_POINT_new(group);
		if (pub_key == NULL) {
			ECerr(EC_F_ECKEY_PRIV_DECODE, ERR_R_EC_LIB);
			goto ecliberr;
		}
		if (!EC_POINT_copy(pub_key, EC_GROUP_get0_generator(group))) {
			EC_POINT_free(pub_key);
			ECerr(EC_F_ECKEY_PRIV_DECODE, ERR_R_EC_LIB);
			goto ecliberr;
		}
		priv_key = EC_KEY_get0_private_key(eckey);
		if (!EC_POINT_mul(group, pub_key, priv_key, NULL, NULL, NULL)) {
			EC_POINT_free(pub_key);
			ECerr(EC_F_ECKEY_PRIV_DECODE, ERR_R_EC_LIB);
			goto ecliberr;
		}
		if (EC_KEY_set_public_key(eckey, pub_key) == 0) {
			EC_POINT_free(pub_key);
			ECerr(EC_F_ECKEY_PRIV_DECODE, ERR_R_EC_LIB);
			goto ecliberr;
		}
		EC_POINT_free(pub_key);
	}
	EVP_PKEY_assign_EC_KEY(pkey, eckey);
	return 1;

ecliberr:
	ECerr(EC_F_ECKEY_PRIV_DECODE, ERR_R_EC_LIB);
ecerr:
	if (eckey)
		EC_KEY_free(eckey);
	return 0;
}

static int
eckey_priv_encode(PKCS8_PRIV_KEY_INFO * p8, const EVP_PKEY * pkey)
{
	EC_KEY *ec_key;
	unsigned char *ep, *p;
	int eplen, ptype;
	void *pval;
	unsigned int tmp_flags, old_flags;

	ec_key = pkey->pkey.ec;

	if (!eckey_param2type(&ptype, &pval, ec_key)) {
		ECerr(EC_F_ECKEY_PRIV_ENCODE, EC_R_DECODE_ERROR);
		return 0;
	}
	/* set the private key */

	/*
	 * do not include the parameters in the SEC1 private key see PKCS#11
	 * 12.11
	 */
	old_flags = EC_KEY_get_enc_flags(ec_key);
	tmp_flags = old_flags | EC_PKEY_NO_PARAMETERS;
	EC_KEY_set_enc_flags(ec_key, tmp_flags);
	eplen = i2d_ECPrivateKey(ec_key, NULL);
	if (!eplen) {
		EC_KEY_set_enc_flags(ec_key, old_flags);
		ECerr(EC_F_ECKEY_PRIV_ENCODE, ERR_R_EC_LIB);
		return 0;
	}
	ep = malloc(eplen);
	if (!ep) {
		EC_KEY_set_enc_flags(ec_key, old_flags);
		ECerr(EC_F_ECKEY_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
		return 0;
	}
	p = ep;
	if (!i2d_ECPrivateKey(ec_key, &p)) {
		EC_KEY_set_enc_flags(ec_key, old_flags);
		free(ep);
		ECerr(EC_F_ECKEY_PRIV_ENCODE, ERR_R_EC_LIB);
		return 0;
	}
	/* restore old encoding flags */
	EC_KEY_set_enc_flags(ec_key, old_flags);

	if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_X9_62_id_ecPublicKey), 0,
		ptype, pval, ep, eplen))
		return 0;

	return 1;
}

static int
int_ec_size(const EVP_PKEY * pkey)
{
	return ECDSA_size(pkey->pkey.ec);
}

static int
ec_bits(const EVP_PKEY * pkey)
{
	BIGNUM *order = BN_new();
	const EC_GROUP *group;
	int ret;

	if (!order) {
		ERR_clear_error();
		return 0;
	}
	group = EC_KEY_get0_group(pkey->pkey.ec);
	if (!EC_GROUP_get_order(group, order, NULL)) {
		BN_free(order);
		ERR_clear_error();
		return 0;
	}
	ret = BN_num_bits(order);
	BN_free(order);
	return ret;
}

static int
ec_missing_parameters(const EVP_PKEY * pkey)
{
	if (EC_KEY_get0_group(pkey->pkey.ec) == NULL)
		return 1;
	return 0;
}

static int
ec_copy_parameters(EVP_PKEY * to, const EVP_PKEY * from)
{
	return EC_KEY_set_group(to->pkey.ec, EC_KEY_get0_group(from->pkey.ec));
}

static int
ec_cmp_parameters(const EVP_PKEY * a, const EVP_PKEY * b)
{
	const EC_GROUP *group_a = EC_KEY_get0_group(a->pkey.ec), *group_b = EC_KEY_get0_group(b->pkey.ec);
	if (EC_GROUP_cmp(group_a, group_b, NULL))
		return 0;
	else
		return 1;
}

static void
int_ec_free(EVP_PKEY * pkey)
{
	EC_KEY_free(pkey->pkey.ec);
}

static int
do_EC_KEY_print(BIO * bp, const EC_KEY * x, int off, int ktype)
{
	unsigned char *buffer = NULL;
	const char *ecstr;
	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;
	}
	ctx = BN_CTX_new();
	if (ctx == NULL) {
		reason = ERR_R_MALLOC_FAILURE;
		goto err;
	}
	if (ktype > 0) {
		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;
		}
		if (pub_key)
			buf_len = (size_t) BN_num_bytes(pub_key);
	}
	if (ktype == 2) {
		priv_key = EC_KEY_get0_private_key(x);
		if (priv_key && (i = (size_t) BN_num_bytes(priv_key)) > buf_len)
			buf_len = i;
	} else
		priv_key = NULL;

	if (ktype > 0) {
		buf_len += 10;
		if ((buffer = malloc(buf_len)) == NULL) {
			reason = ERR_R_MALLOC_FAILURE;
			goto err;
		}
	}
	if (ktype == 2)
		ecstr = "Private-Key";
	else if (ktype == 1)
		ecstr = "Public-Key";
	else
		ecstr = "ECDSA-Parameters";

	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, "%s: (%d bit)\n", ecstr,
		BN_num_bits(order)) <= 0)
		goto err;

	if ((priv_key != NULL) && !ASN1_bn_print(bp, "priv:", priv_key,
		buffer, off))
		goto err;
	if ((pub_key != NULL) && !ASN1_bn_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_DO_EC_KEY_PRINT, reason);
	BN_free(pub_key);
	BN_free(order);
	BN_CTX_free(ctx);
	free(buffer);
	return (ret);
}

static int
eckey_param_decode(EVP_PKEY * pkey,
    const unsigned char **pder, int derlen)
{
	EC_KEY *eckey;
	if (!(eckey = d2i_ECParameters(NULL, pder, derlen))) {
		ECerr(EC_F_ECKEY_PARAM_DECODE, ERR_R_EC_LIB);
		return 0;
	}
	EVP_PKEY_assign_EC_KEY(pkey, eckey);
	return 1;
}

static int
eckey_param_encode(const EVP_PKEY * pkey, unsigned char **pder)
{
	return i2d_ECParameters(pkey->pkey.ec, pder);
}

static int
eckey_param_print(BIO * bp, const EVP_PKEY * pkey, int indent,
    ASN1_PCTX * ctx)
{
	return do_EC_KEY_print(bp, pkey->pkey.ec, indent, 0);
}

static int
eckey_pub_print(BIO * bp, const EVP_PKEY * pkey, int indent,
    ASN1_PCTX * ctx)
{
	return do_EC_KEY_print(bp, pkey->pkey.ec, indent, 1);
}


static int
eckey_priv_print(BIO * bp, const EVP_PKEY * pkey, int indent,
    ASN1_PCTX * ctx)
{
	return do_EC_KEY_print(bp, pkey->pkey.ec, indent, 2);
}

static int
old_ec_priv_decode(EVP_PKEY * pkey,
    const unsigned char **pder, int derlen)
{
	EC_KEY *ec;
	if (!(ec = d2i_ECPrivateKey(NULL, pder, derlen))) {
		ECerr(EC_F_OLD_EC_PRIV_DECODE, EC_R_DECODE_ERROR);
		return 0;
	}
	EVP_PKEY_assign_EC_KEY(pkey, ec);
	return 1;
}

static int
old_ec_priv_encode(const EVP_PKEY * pkey, unsigned char **pder)
{
	return i2d_ECPrivateKey(pkey->pkey.ec, pder);
}

static int
ec_pkey_ctrl(EVP_PKEY * pkey, int op, long arg1, void *arg2)
{
	switch (op) {
	case ASN1_PKEY_CTRL_PKCS7_SIGN:
		if (arg1 == 0) {
			int snid, hnid;
			X509_ALGOR *alg1, *alg2;
			PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, &alg1, &alg2);
			if (alg1 == NULL || alg1->algorithm == NULL)
				return -1;
			hnid = OBJ_obj2nid(alg1->algorithm);
			if (hnid == NID_undef)
				return -1;
			if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
				return -1;
			X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
		}
		return 1;
#ifndef OPENSSL_NO_CMS
	case ASN1_PKEY_CTRL_CMS_SIGN:
		if (arg1 == 0) {
			int snid, hnid;
			X509_ALGOR *alg1, *alg2;
			CMS_SignerInfo_get0_algs(arg2, NULL, NULL,
			    &alg1, &alg2);
			if (alg1 == NULL || alg1->algorithm == NULL)
				return -1;
			hnid = OBJ_obj2nid(alg1->algorithm);
			if (hnid == NID_undef)
				return -1;
			if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
				return -1;
			X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
		}
		return 1;
#endif

	case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
		*(int *) arg2 = NID_sha1;
		return 2;

	default:
		return -2;

	}

}

const EVP_PKEY_ASN1_METHOD eckey_asn1_meth = {
	.pkey_id = EVP_PKEY_EC,
	.pkey_base_id = EVP_PKEY_EC,

	.pem_str = "EC",
	.info = "OpenSSL EC algorithm",

	.pub_decode = eckey_pub_decode,
	.pub_encode = eckey_pub_encode,
	.pub_cmp = eckey_pub_cmp,
	.pub_print = eckey_pub_print,

	.priv_decode = eckey_priv_decode,
	.priv_encode = eckey_priv_encode,
	.priv_print = eckey_priv_print,

	.pkey_size = int_ec_size,
	.pkey_bits = ec_bits,

	.param_decode = eckey_param_decode,
	.param_encode = eckey_param_encode,
	.param_missing = ec_missing_parameters,
	.param_copy = ec_copy_parameters,
	.param_cmp = ec_cmp_parameters,
	.param_print = eckey_param_print,

	.pkey_free = int_ec_free,
	.pkey_ctrl = ec_pkey_ctrl,
	.old_priv_decode = old_ec_priv_decode,
	.old_priv_encode = old_ec_priv_encode
};


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: ec_ameth.c,v 1.16 2015/02/11 04:05:14 beck Exp $ */
2			/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3			* project 2006.
4			*/
5			/* ====================================================================
6			* Copyright (c) 2006 The OpenSSL Project. All rights reserved.
7			*
8			* Redistribution and use in source and binary forms, with or without
9			* modification, are permitted provided that the following conditions
10			* are met:
11			*
12			* 1. Redistributions of source code must retain the above copyright
13			* notice, this list of conditions and the following disclaimer.
14			*
15			* 2. Redistributions in binary form must reproduce the above copyright
16			* notice, this list of conditions and the following disclaimer in
17			* the documentation and/or other materials provided with the
18			* distribution.
19			*
20			* 3. All advertising materials mentioning features or use of this
21			* software must display the following acknowledgment:
22			* "This product includes software developed by the OpenSSL Project
23			* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24			*
25			* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26			* endorse or promote products derived from this software without
27			* prior written permission. For written permission, please contact
28			* licensing@OpenSSL.org.
29			*
30			* 5. Products derived from this software may not be called "OpenSSL"
31			* nor may "OpenSSL" appear in their names without prior written
32			* permission of the OpenSSL Project.
33			*
34			* 6. Redistributions of any form whatsoever must retain the following
35			* acknowledgment:
36			* "This product includes software developed by the OpenSSL Project
37			* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38			*
39			* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40			* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42			* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43			* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44			* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45			* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46			* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48			* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49			* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50			* OF THE POSSIBILITY OF SUCH DAMAGE.
51			* ====================================================================
52			*
53			* This product includes cryptographic software written by Eric Young
54			* (eay@cryptsoft.com). This product includes software written by Tim
55			* Hudson (tjh@cryptsoft.com).
56			*
57			*/
58
59			#include <stdio.h>
60
61			#include <openssl/opensslconf.h>
62
63			#include <openssl/bn.h>
64			#include <openssl/ec.h>
65			#include <openssl/err.h>
66			#include <openssl/x509.h>
67
68			#ifndef OPENSSL_NO_CMS
69			#include <openssl/cms.h>
70			#endif
71
72			#include "asn1_locl.h"
73
74			static int
75			eckey_param2type(int pptype, void ppval, EC_KEY ec_key)
76			{
77			const EC_GROUP *group;
78			int nid;
79			if (ec_key == NULL \|\| (group = EC_KEY_get0_group(ec_key)) == NULL) {
80			ECerr(EC_F_ECKEY_PARAM2TYPE, EC_R_MISSING_PARAMETERS);
81			return 0;
82			}
83			if (EC_GROUP_get_asn1_flag(group) &&
84			(nid = EC_GROUP_get_curve_name(group))) {
85			/* we have a 'named curve' => just set the OID */
86			*ppval = OBJ_nid2obj(nid);
87			*pptype = V_ASN1_OBJECT;
88			} else {
89			/* explicit parameters */
90			ASN1_STRING *pstr = NULL;
91			pstr = ASN1_STRING_new();
92			if (!pstr)
93			return 0;
94			pstr->length = i2d_ECParameters(ec_key, &pstr->data);
95			if (pstr->length <= 0) {
96			ASN1_STRING_free(pstr);
97			ECerr(EC_F_ECKEY_PARAM2TYPE, ERR_R_EC_LIB);
98			return 0;
99			}
100			*ppval = pstr;
101			*pptype = V_ASN1_SEQUENCE;
102			}
103			return 1;
104			}
105
106			static int
107			eckey_pub_encode(X509_PUBKEY * pk, const EVP_PKEY * pkey)
108			{
109			EC_KEY *ec_key = pkey->pkey.ec;
110			void *pval = NULL;
111			int ptype;
112			unsigned char penc = NULL, p;
113			int penclen;
114
115			if (!eckey_param2type(&ptype, &pval, ec_key)) {
116			ECerr(EC_F_ECKEY_PUB_ENCODE, ERR_R_EC_LIB);
117			return 0;
118			}
119			penclen = i2o_ECPublicKey(ec_key, NULL);
120			if (penclen <= 0)
121			goto err;
122			penc = malloc(penclen);
123			if (!penc)
124			goto err;
125			p = penc;
126			penclen = i2o_ECPublicKey(ec_key, &p);
127			if (penclen <= 0)
128			goto err;
129			if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_EC),
130			ptype, pval, penc, penclen))
131			return 1;
132			err:
133			if (ptype == V_ASN1_OBJECT)
134			ASN1_OBJECT_free(pval);
135			else
136			ASN1_STRING_free(pval);
137			free(penc);
138			return 0;
139			}
140
141			static EC_KEY *
142			eckey_type2param(int ptype, void *pval)
143		2	{
144		2	EC_KEY *eckey = NULL;
145
146	✗✓	2	if (ptype == V_ASN1_SEQUENCE) {
147			ASN1_STRING *pstr = pval;
148			const unsigned char *pm = NULL;
149			int pmlen;
150
151			pm = pstr->data;
152			pmlen = pstr->length;
153			if (!(eckey = d2i_ECParameters(NULL, &pm, pmlen))) {
154			ECerr(EC_F_ECKEY_TYPE2PARAM, EC_R_DECODE_ERROR);
155			goto ecerr;
156			}
157	✓✗	2	} else if (ptype == V_ASN1_OBJECT) {
158		2	ASN1_OBJECT *poid = pval;
159			EC_GROUP *group;
160
161			/*
162			* type == V_ASN1_OBJECT => the parameters are given by an
163			* asn1 OID
164			*/
165	✗✓	2	if ((eckey = EC_KEY_new()) == NULL) {
166			ECerr(EC_F_ECKEY_TYPE2PARAM, ERR_R_MALLOC_FAILURE);
167			goto ecerr;
168			}
169		2	group = EC_GROUP_new_by_curve_name(OBJ_obj2nid(poid));
170	✗✓	2	if (group == NULL)
171			goto ecerr;
172		2	EC_GROUP_set_asn1_flag(group, OPENSSL_EC_NAMED_CURVE);
173	✗✓	2	if (EC_KEY_set_group(eckey, group) == 0)
174			goto ecerr;
175		2	EC_GROUP_free(group);
176			} else {
177			ECerr(EC_F_ECKEY_TYPE2PARAM, EC_R_DECODE_ERROR);
178			goto ecerr;
179			}
180
181		2	return eckey;
182
183			ecerr:
184			if (eckey)
185			EC_KEY_free(eckey);
186			return NULL;
187			}
188
189			static int
190			eckey_pub_decode(EVP_PKEY * pkey, X509_PUBKEY * pubkey)
191		2	{
192		2	const unsigned char *p = NULL;
193			void *pval;
194			int ptype, pklen;
195		2	EC_KEY *eckey = NULL;
196			X509_ALGOR *palg;
197
198	✗✓	2	if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey))
199			return 0;
200		2	X509_ALGOR_get0(NULL, &ptype, &pval, palg);
201
202		2	eckey = eckey_type2param(ptype, pval);
203
204	✗✓	2	if (!eckey) {
205			ECerr(EC_F_ECKEY_PUB_DECODE, ERR_R_EC_LIB);
206			return 0;
207			}
208			/* We have parameters now set public key */
209	✗✓	2	if (!o2i_ECPublicKey(&eckey, &p, pklen)) {
210			ECerr(EC_F_ECKEY_PUB_DECODE, EC_R_DECODE_ERROR);
211			goto ecerr;
212			}
213		2	EVP_PKEY_assign_EC_KEY(pkey, eckey);
214		2	return 1;
215
216			ecerr:
217			if (eckey)
218			EC_KEY_free(eckey);
219			return 0;
220			}
221
222			static int
223			eckey_pub_cmp(const EVP_PKEY * a, const EVP_PKEY * b)
224			{
225			int r;
226			const EC_GROUP *group = EC_KEY_get0_group(b->pkey.ec);
227			const EC_POINT pa = EC_KEY_get0_public_key(a->pkey.ec), pb = EC_KEY_get0_public_key(b->pkey.ec);
228
229			r = EC_POINT_cmp(group, pa, pb, NULL);
230			if (r == 0)
231			return 1;
232			if (r == 1)
233			return 0;
234			return -2;
235			}
236
237			static int
238			eckey_priv_decode(EVP_PKEY * pkey, PKCS8_PRIV_KEY_INFO * p8)
239			{
240			const unsigned char *p = NULL;
241			void *pval;
242			int ptype, pklen;
243			EC_KEY *eckey = NULL;
244			X509_ALGOR *palg;
245
246			if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8))
247			return 0;
248			X509_ALGOR_get0(NULL, &ptype, &pval, palg);
249
250			eckey = eckey_type2param(ptype, pval);
251
252			if (!eckey)
253			goto ecliberr;
254
255			/* We have parameters now set private key */
256			if (!d2i_ECPrivateKey(&eckey, &p, pklen)) {
257			ECerr(EC_F_ECKEY_PRIV_DECODE, EC_R_DECODE_ERROR);
258			goto ecerr;
259			}
260			/* calculate public key (if necessary) */
261			if (EC_KEY_get0_public_key(eckey) == NULL) {
262			const BIGNUM *priv_key;
263			const EC_GROUP *group;
264			EC_POINT *pub_key;
265			/*
266			* the public key was not included in the SEC1 private key =>
267			* calculate the public key
268			*/
269			group = EC_KEY_get0_group(eckey);
270			pub_key = EC_POINT_new(group);
271			if (pub_key == NULL) {
272			ECerr(EC_F_ECKEY_PRIV_DECODE, ERR_R_EC_LIB);
273			goto ecliberr;
274			}
275			if (!EC_POINT_copy(pub_key, EC_GROUP_get0_generator(group))) {
276			EC_POINT_free(pub_key);
277			ECerr(EC_F_ECKEY_PRIV_DECODE, ERR_R_EC_LIB);
278			goto ecliberr;
279			}
280			priv_key = EC_KEY_get0_private_key(eckey);
281			if (!EC_POINT_mul(group, pub_key, priv_key, NULL, NULL, NULL)) {
282			EC_POINT_free(pub_key);
283			ECerr(EC_F_ECKEY_PRIV_DECODE, ERR_R_EC_LIB);
284			goto ecliberr;
285			}
286			if (EC_KEY_set_public_key(eckey, pub_key) == 0) {
287			EC_POINT_free(pub_key);
288			ECerr(EC_F_ECKEY_PRIV_DECODE, ERR_R_EC_LIB);
289			goto ecliberr;
290			}
291			EC_POINT_free(pub_key);
292			}
293			EVP_PKEY_assign_EC_KEY(pkey, eckey);
294			return 1;
295
296			ecliberr:
297			ECerr(EC_F_ECKEY_PRIV_DECODE, ERR_R_EC_LIB);
298			ecerr:
299			if (eckey)
300			EC_KEY_free(eckey);
301			return 0;
302			}
303
304			static int
305			eckey_priv_encode(PKCS8_PRIV_KEY_INFO * p8, const EVP_PKEY * pkey)
306			{
307			EC_KEY *ec_key;
308			unsigned char ep, p;
309			int eplen, ptype;
310			void *pval;
311			unsigned int tmp_flags, old_flags;
312
313			ec_key = pkey->pkey.ec;
314
315			if (!eckey_param2type(&ptype, &pval, ec_key)) {
316			ECerr(EC_F_ECKEY_PRIV_ENCODE, EC_R_DECODE_ERROR);
317			return 0;
318			}
319			/* set the private key */
320
321			/*
322			* do not include the parameters in the SEC1 private key see PKCS#11
323			* 12.11
324			*/
325			old_flags = EC_KEY_get_enc_flags(ec_key);
326			tmp_flags = old_flags \| EC_PKEY_NO_PARAMETERS;
327			EC_KEY_set_enc_flags(ec_key, tmp_flags);
328			eplen = i2d_ECPrivateKey(ec_key, NULL);
329			if (!eplen) {
330			EC_KEY_set_enc_flags(ec_key, old_flags);
331			ECerr(EC_F_ECKEY_PRIV_ENCODE, ERR_R_EC_LIB);
332			return 0;
333			}
334			ep = malloc(eplen);
335			if (!ep) {
336			EC_KEY_set_enc_flags(ec_key, old_flags);
337			ECerr(EC_F_ECKEY_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
338			return 0;
339			}
340			p = ep;
341			if (!i2d_ECPrivateKey(ec_key, &p)) {
342			EC_KEY_set_enc_flags(ec_key, old_flags);
343			free(ep);
344			ECerr(EC_F_ECKEY_PRIV_ENCODE, ERR_R_EC_LIB);
345			return 0;
346			}
347			/* restore old encoding flags */
348			EC_KEY_set_enc_flags(ec_key, old_flags);
349
350			if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_X9_62_id_ecPublicKey), 0,
351			ptype, pval, ep, eplen))
352			return 0;
353
354			return 1;
355			}
356
357			static int
358			int_ec_size(const EVP_PKEY * pkey)
359		1	{
360		1	return ECDSA_size(pkey->pkey.ec);
361			}
362
363			static int
364			ec_bits(const EVP_PKEY * pkey)
365			{
366			BIGNUM *order = BN_new();
367			const EC_GROUP *group;
368			int ret;
369
370			if (!order) {
371			ERR_clear_error();
372			return 0;
373			}
374			group = EC_KEY_get0_group(pkey->pkey.ec);
375			if (!EC_GROUP_get_order(group, order, NULL)) {
376			BN_free(order);
377			ERR_clear_error();
378			return 0;
379			}
380			ret = BN_num_bits(order);
381			BN_free(order);
382			return ret;
383			}
384
385			static int
386			ec_missing_parameters(const EVP_PKEY * pkey)
387		3	{
388	✗✓	3	if (EC_KEY_get0_group(pkey->pkey.ec) == NULL)
389			return 1;
390		3	return 0;
391			}
392
393			static int
394			ec_copy_parameters(EVP_PKEY * to, const EVP_PKEY * from)
395			{
396			return EC_KEY_set_group(to->pkey.ec, EC_KEY_get0_group(from->pkey.ec));
397			}
398
399			static int
400			ec_cmp_parameters(const EVP_PKEY * a, const EVP_PKEY * b)
401			{
402			const EC_GROUP group_a = EC_KEY_get0_group(a->pkey.ec), group_b = EC_KEY_get0_group(b->pkey.ec);
403			if (EC_GROUP_cmp(group_a, group_b, NULL))
404			return 0;
405			else
406			return 1;
407			}
408
409			static void
410			int_ec_free(EVP_PKEY * pkey)
411			{
412			EC_KEY_free(pkey->pkey.ec);
413			}
414
415			static int
416			do_EC_KEY_print(BIO * bp, const EC_KEY * x, int off, int ktype)
417			{
418			unsigned char *buffer = NULL;
419			const char *ecstr;
420			size_t buf_len = 0, i;
421			int ret = 0, reason = ERR_R_BIO_LIB;
422			BIGNUM pub_key = NULL, order = NULL;
423			BN_CTX *ctx = NULL;
424			const EC_GROUP *group;
425			const EC_POINT *public_key;
426			const BIGNUM *priv_key;
427
428			if (x == NULL \|\| (group = EC_KEY_get0_group(x)) == NULL) {
429			reason = ERR_R_PASSED_NULL_PARAMETER;
430			goto err;
431			}
432			ctx = BN_CTX_new();
433			if (ctx == NULL) {
434			reason = ERR_R_MALLOC_FAILURE;
435			goto err;
436			}
437			if (ktype > 0) {
438			public_key = EC_KEY_get0_public_key(x);
439			if ((pub_key = EC_POINT_point2bn(group, public_key,
440			EC_KEY_get_conv_form(x), NULL, ctx)) == NULL) {
441			reason = ERR_R_EC_LIB;
442			goto err;
443			}
444			if (pub_key)
445			buf_len = (size_t) BN_num_bytes(pub_key);
446			}
447			if (ktype == 2) {
448			priv_key = EC_KEY_get0_private_key(x);
449			if (priv_key && (i = (size_t) BN_num_bytes(priv_key)) > buf_len)
450			buf_len = i;
451			} else
452			priv_key = NULL;
453
454			if (ktype > 0) {
455			buf_len += 10;
456			if ((buffer = malloc(buf_len)) == NULL) {
457			reason = ERR_R_MALLOC_FAILURE;
458			goto err;
459			}
460			}
461			if (ktype == 2)
462			ecstr = "Private-Key";
463			else if (ktype == 1)
464			ecstr = "Public-Key";
465			else
466			ecstr = "ECDSA-Parameters";
467
468			if (!BIO_indent(bp, off, 128))
469			goto err;
470			if ((order = BN_new()) == NULL)
471			goto err;
472			if (!EC_GROUP_get_order(group, order, NULL))
473			goto err;
474			if (BIO_printf(bp, "%s: (%d bit)\n", ecstr,
475			BN_num_bits(order)) <= 0)
476			goto err;
477
478			if ((priv_key != NULL) && !ASN1_bn_print(bp, "priv:", priv_key,
479			buffer, off))
480			goto err;
481			if ((pub_key != NULL) && !ASN1_bn_print(bp, "pub: ", pub_key,
482			buffer, off))
483			goto err;
484			if (!ECPKParameters_print(bp, group, off))
485			goto err;
486			ret = 1;
487			err:
488			if (!ret)
489			ECerr(EC_F_DO_EC_KEY_PRINT, reason);
490			BN_free(pub_key);
491			BN_free(order);
492			BN_CTX_free(ctx);
493			free(buffer);
494			return (ret);
495			}
496
497			static int
498			eckey_param_decode(EVP_PKEY * pkey,
499			const unsigned char **pder, int derlen)
500			{
501			EC_KEY *eckey;
502			if (!(eckey = d2i_ECParameters(NULL, pder, derlen))) {
503			ECerr(EC_F_ECKEY_PARAM_DECODE, ERR_R_EC_LIB);
504			return 0;
505			}
506			EVP_PKEY_assign_EC_KEY(pkey, eckey);
507			return 1;
508			}
509
510			static int
511			eckey_param_encode(const EVP_PKEY * pkey, unsigned char **pder)
512			{
513			return i2d_ECParameters(pkey->pkey.ec, pder);
514			}
515
516			static int
517			eckey_param_print(BIO * bp, const EVP_PKEY * pkey, int indent,
518			ASN1_PCTX * ctx)
519			{
520			return do_EC_KEY_print(bp, pkey->pkey.ec, indent, 0);
521			}
522
523			static int
524			eckey_pub_print(BIO * bp, const EVP_PKEY * pkey, int indent,
525			ASN1_PCTX * ctx)
526			{
527			return do_EC_KEY_print(bp, pkey->pkey.ec, indent, 1);
528			}
529
530
531			static int
532			eckey_priv_print(BIO * bp, const EVP_PKEY * pkey, int indent,
533			ASN1_PCTX * ctx)
534			{
535			return do_EC_KEY_print(bp, pkey->pkey.ec, indent, 2);
536			}
537
538			static int
539			old_ec_priv_decode(EVP_PKEY * pkey,
540			const unsigned char **pder, int derlen)
541			{
542			EC_KEY *ec;
543			if (!(ec = d2i_ECPrivateKey(NULL, pder, derlen))) {
544			ECerr(EC_F_OLD_EC_PRIV_DECODE, EC_R_DECODE_ERROR);
545			return 0;
546			}
547			EVP_PKEY_assign_EC_KEY(pkey, ec);
548			return 1;
549			}
550
551			static int
552			old_ec_priv_encode(const EVP_PKEY * pkey, unsigned char **pder)
553			{
554			return i2d_ECPrivateKey(pkey->pkey.ec, pder);
555			}
556
557			static int
558			ec_pkey_ctrl(EVP_PKEY * pkey, int op, long arg1, void *arg2)
559			{
560			switch (op) {
561			case ASN1_PKEY_CTRL_PKCS7_SIGN:
562			if (arg1 == 0) {
563			int snid, hnid;
564			X509_ALGOR alg1, alg2;
565			PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, &alg1, &alg2);
566			if (alg1 == NULL \|\| alg1->algorithm == NULL)
567			return -1;
568			hnid = OBJ_obj2nid(alg1->algorithm);
569			if (hnid == NID_undef)
570			return -1;
571			if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
572			return -1;
573			X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
574			}
575			return 1;
576			#ifndef OPENSSL_NO_CMS
577			case ASN1_PKEY_CTRL_CMS_SIGN:
578			if (arg1 == 0) {
579			int snid, hnid;
580			X509_ALGOR alg1, alg2;
581			CMS_SignerInfo_get0_algs(arg2, NULL, NULL,
582			&alg1, &alg2);
583			if (alg1 == NULL \|\| alg1->algorithm == NULL)
584			return -1;
585			hnid = OBJ_obj2nid(alg1->algorithm);
586			if (hnid == NID_undef)
587			return -1;
588			if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
589			return -1;
590			X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
591			}
592			return 1;
593			#endif
594
595			case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
596			(int ) arg2 = NID_sha1;
597			return 2;
598
599			default:
600			return -2;
601
602			}
603
604			}
605
606			const EVP_PKEY_ASN1_METHOD eckey_asn1_meth = {
607			.pkey_id = EVP_PKEY_EC,
608			.pkey_base_id = EVP_PKEY_EC,
609
610			.pem_str = "EC",
611			.info = "OpenSSL EC algorithm",
612
613			.pub_decode = eckey_pub_decode,
614			.pub_encode = eckey_pub_encode,
615			.pub_cmp = eckey_pub_cmp,
616			.pub_print = eckey_pub_print,
617
618			.priv_decode = eckey_priv_decode,
619			.priv_encode = eckey_priv_encode,
620			.priv_print = eckey_priv_print,
621
622			.pkey_size = int_ec_size,
623			.pkey_bits = ec_bits,
624
625			.param_decode = eckey_param_decode,
626			.param_encode = eckey_param_encode,
627			.param_missing = ec_missing_parameters,
628			.param_copy = ec_copy_parameters,
629			.param_cmp = ec_cmp_parameters,
630			.param_print = eckey_param_print,
631
632			.pkey_free = int_ec_free,
633			.pkey_ctrl = ec_pkey_ctrl,
634			.old_priv_decode = old_ec_priv_decode,
635			.old_priv_encode = old_ec_priv_encode
636			};