Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libcrypto/ec/ec_pmeth.c	Lines:	45	117	38.5 %
Date:	2017-11-13	Branches:	14	69	20.3 %


/* $OpenBSD: ec_pmeth.c,v 1.10 2017/01/29 17:49:23 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 <string.h>

#include <openssl/asn1t.h>
#include <openssl/ec.h>
#include <openssl/ecdsa.h>
#include <openssl/err.h>
#include <openssl/evp.h>
#include <openssl/x509.h>

#include "evp_locl.h"

/* EC pkey context structure */

typedef struct {
	/* Key and paramgen group */
	EC_GROUP *gen_group;
	/* message digest */
	const EVP_MD *md;
} EC_PKEY_CTX;

static int
pkey_ec_init(EVP_PKEY_CTX * ctx)
{
	EC_PKEY_CTX *dctx;
	dctx = malloc(sizeof(EC_PKEY_CTX));
	if (!dctx)
		return 0;
	dctx->gen_group = NULL;
	dctx->md = NULL;

	ctx->data = dctx;

	return 1;
}

static int
pkey_ec_copy(EVP_PKEY_CTX * dst, EVP_PKEY_CTX * src)
{
	EC_PKEY_CTX *dctx, *sctx;
	if (!pkey_ec_init(dst))
		return 0;
	sctx = src->data;
	dctx = dst->data;
	if (sctx->gen_group) {
		dctx->gen_group = EC_GROUP_dup(sctx->gen_group);
		if (!dctx->gen_group)
			return 0;
	}
	dctx->md = sctx->md;
	return 1;
}

static void
pkey_ec_cleanup(EVP_PKEY_CTX * ctx)
{
	EC_PKEY_CTX *dctx = ctx->data;
	if (dctx) {
		EC_GROUP_free(dctx->gen_group);
		free(dctx);
	}
}

static int
pkey_ec_sign(EVP_PKEY_CTX * ctx, unsigned char *sig, size_t * siglen,
    const unsigned char *tbs, size_t tbslen)
{
	int ret, type;
	unsigned int sltmp;
	EC_PKEY_CTX *dctx = ctx->data;
	EC_KEY *ec = ctx->pkey->pkey.ec;

	if (!sig) {
		*siglen = ECDSA_size(ec);
		return 1;
	} else if (*siglen < (size_t) ECDSA_size(ec)) {
		ECerror(EC_R_BUFFER_TOO_SMALL);
		return 0;
	}
	if (dctx->md)
		type = EVP_MD_type(dctx->md);
	else
		type = NID_sha1;


	ret = ECDSA_sign(type, tbs, tbslen, sig, &sltmp, ec);

	if (ret <= 0)
		return ret;
	*siglen = (size_t) sltmp;
	return 1;
}

static int
pkey_ec_verify(EVP_PKEY_CTX * ctx,
    const unsigned char *sig, size_t siglen,
    const unsigned char *tbs, size_t tbslen)
{
	int ret, type;
	EC_PKEY_CTX *dctx = ctx->data;
	EC_KEY *ec = ctx->pkey->pkey.ec;

	if (dctx->md)
		type = EVP_MD_type(dctx->md);
	else
		type = NID_sha1;

	ret = ECDSA_verify(type, tbs, tbslen, sig, siglen, ec);

	return ret;
}

static int
pkey_ec_derive(EVP_PKEY_CTX * ctx, unsigned char *key, size_t * keylen)
{
	int ret;
	size_t outlen;
	const EC_POINT *pubkey = NULL;
	if (!ctx->pkey || !ctx->peerkey) {
		ECerror(EC_R_KEYS_NOT_SET);
		return 0;
	}
	if (!key) {
		const EC_GROUP *group;
		group = EC_KEY_get0_group(ctx->pkey->pkey.ec);
		*keylen = (EC_GROUP_get_degree(group) + 7) / 8;
		return 1;
	}
	pubkey = EC_KEY_get0_public_key(ctx->peerkey->pkey.ec);

	/*
	 * NB: unlike PKCS#3 DH, if *outlen is less than maximum size this is
	 * not an error, the result is truncated.
	 */

	outlen = *keylen;

	ret = ECDH_compute_key(key, outlen, pubkey, ctx->pkey->pkey.ec, 0);
	if (ret < 0)
		return ret;
	*keylen = ret;
	return 1;
}

static int
pkey_ec_ctrl(EVP_PKEY_CTX * ctx, int type, int p1, void *p2)
{
	EC_PKEY_CTX *dctx = ctx->data;
	EC_GROUP *group;
	switch (type) {
	case EVP_PKEY_CTRL_EC_PARAMGEN_CURVE_NID:
		group = EC_GROUP_new_by_curve_name(p1);
		if (group == NULL) {
			ECerror(EC_R_INVALID_CURVE);
			return 0;
		}
		EC_GROUP_free(dctx->gen_group);
		dctx->gen_group = group;
		return 1;

	case EVP_PKEY_CTRL_MD:
		if (EVP_MD_type((const EVP_MD *) p2) != NID_sha1 &&
		    EVP_MD_type((const EVP_MD *) p2) != NID_ecdsa_with_SHA1 &&
		    EVP_MD_type((const EVP_MD *) p2) != NID_sha224 &&
		    EVP_MD_type((const EVP_MD *) p2) != NID_sha256 &&
		    EVP_MD_type((const EVP_MD *) p2) != NID_sha384 &&
		    EVP_MD_type((const EVP_MD *) p2) != NID_sha512) {
			ECerror(EC_R_INVALID_DIGEST_TYPE);
			return 0;
		}
		dctx->md = p2;
		return 1;

	case EVP_PKEY_CTRL_PEER_KEY:
		/* Default behaviour is OK */
	case EVP_PKEY_CTRL_DIGESTINIT:
	case EVP_PKEY_CTRL_PKCS7_SIGN:
	case EVP_PKEY_CTRL_CMS_SIGN:
		return 1;

	default:
		return -2;

	}
}

static int
pkey_ec_ctrl_str(EVP_PKEY_CTX * ctx,
    const char *type, const char *value)
{
	if (!strcmp(type, "ec_paramgen_curve")) {
		int nid;
		nid = EC_curve_nist2nid(value);
		if (nid == NID_undef)
			nid = OBJ_sn2nid(value);
		if (nid == NID_undef)
			nid = OBJ_ln2nid(value);
		if (nid == NID_undef) {
			ECerror(EC_R_INVALID_CURVE);
			return 0;
		}
		return EVP_PKEY_CTX_set_ec_paramgen_curve_nid(ctx, nid);
	}
	return -2;
}

static int
pkey_ec_paramgen(EVP_PKEY_CTX * ctx, EVP_PKEY * pkey)
{
	EC_KEY *ec = NULL;
	EC_PKEY_CTX *dctx = ctx->data;
	int ret = 0;
	if (dctx->gen_group == NULL) {
		ECerror(EC_R_NO_PARAMETERS_SET);
		return 0;
	}
	ec = EC_KEY_new();
	if (!ec)
		return 0;
	ret = EC_KEY_set_group(ec, dctx->gen_group);
	if (ret)
		EVP_PKEY_assign_EC_KEY(pkey, ec);
	else
		EC_KEY_free(ec);
	return ret;
}

static int
pkey_ec_keygen(EVP_PKEY_CTX * ctx, EVP_PKEY * pkey)
{
	EC_KEY *ec = NULL;
	if (ctx->pkey == NULL) {
		ECerror(EC_R_NO_PARAMETERS_SET);
		return 0;
	}
	ec = EC_KEY_new();
	if (!ec)
		return 0;
	EVP_PKEY_assign_EC_KEY(pkey, ec);
	/* Note: if error return, pkey is freed by parent routine */
	if (!EVP_PKEY_copy_parameters(pkey, ctx->pkey))
		return 0;
	return EC_KEY_generate_key(pkey->pkey.ec);
}

const EVP_PKEY_METHOD ec_pkey_meth = {
	.pkey_id = EVP_PKEY_EC,

	.init = pkey_ec_init,
	.copy = pkey_ec_copy,
	.cleanup = pkey_ec_cleanup,

	.paramgen = pkey_ec_paramgen,

	.keygen = pkey_ec_keygen,

	.sign = pkey_ec_sign,

	.verify = pkey_ec_verify,

	.derive = pkey_ec_derive,

	.ctrl = pkey_ec_ctrl,
	.ctrl_str = pkey_ec_ctrl_str
};


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: ec_pmeth.c,v 1.10 2017/01/29 17:49:23 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			#include <string.h>
61
62			#include <openssl/asn1t.h>
63			#include <openssl/ec.h>
64			#include <openssl/ecdsa.h>
65			#include <openssl/err.h>
66			#include <openssl/evp.h>
67			#include <openssl/x509.h>
68
69			#include "evp_locl.h"
70
71			/* EC pkey context structure */
72
73			typedef struct {
74			/* Key and paramgen group */
75			EC_GROUP *gen_group;
76			/* message digest */
77			const EVP_MD *md;
78			} EC_PKEY_CTX;
79
80			static int
81			pkey_ec_init(EVP_PKEY_CTX * ctx)
82			{
83			EC_PKEY_CTX *dctx;
84		8	dctx = malloc(sizeof(EC_PKEY_CTX));
85	✗✓	4	if (!dctx)
86			return 0;
87		4	dctx->gen_group = NULL;
88		4	dctx->md = NULL;
89
90		4	ctx->data = dctx;
91
92		4	return 1;
93		4	}
94
95			static int
96			pkey_ec_copy(EVP_PKEY_CTX * dst, EVP_PKEY_CTX * src)
97			{
98			EC_PKEY_CTX dctx, sctx;
99			if (!pkey_ec_init(dst))
100			return 0;
101			sctx = src->data;
102			dctx = dst->data;
103			if (sctx->gen_group) {
104			dctx->gen_group = EC_GROUP_dup(sctx->gen_group);
105			if (!dctx->gen_group)
106			return 0;
107			}
108			dctx->md = sctx->md;
109			return 1;
110			}
111
112			static void
113			pkey_ec_cleanup(EVP_PKEY_CTX * ctx)
114			{
115		8	EC_PKEY_CTX *dctx = ctx->data;
116	✓✗	4	if (dctx) {
117		4	EC_GROUP_free(dctx->gen_group);
118		4	free(dctx);
119		4	}
120		4	}
121
122			static int
123			pkey_ec_sign(EVP_PKEY_CTX * ctx, unsigned char sig, size_t siglen,
124			const unsigned char *tbs, size_t tbslen)
125			{
126			int ret, type;
127			unsigned int sltmp;
128			EC_PKEY_CTX *dctx = ctx->data;
129			EC_KEY *ec = ctx->pkey->pkey.ec;
130
131			if (!sig) {
132			*siglen = ECDSA_size(ec);
133			return 1;
134			} else if (*siglen < (size_t) ECDSA_size(ec)) {
135			ECerror(EC_R_BUFFER_TOO_SMALL);
136			return 0;
137			}
138			if (dctx->md)
139			type = EVP_MD_type(dctx->md);
140			else
141			type = NID_sha1;
142
143
144			ret = ECDSA_sign(type, tbs, tbslen, sig, &sltmp, ec);
145
146			if (ret <= 0)
147			return ret;
148			*siglen = (size_t) sltmp;
149			return 1;
150			}
151
152			static int
153			pkey_ec_verify(EVP_PKEY_CTX * ctx,
154			const unsigned char *sig, size_t siglen,
155			const unsigned char *tbs, size_t tbslen)
156			{
157			int ret, type;
158			EC_PKEY_CTX *dctx = ctx->data;
159			EC_KEY *ec = ctx->pkey->pkey.ec;
160
161			if (dctx->md)
162			type = EVP_MD_type(dctx->md);
163			else
164			type = NID_sha1;
165
166			ret = ECDSA_verify(type, tbs, tbslen, sig, siglen, ec);
167
168			return ret;
169			}
170
171			static int
172			pkey_ec_derive(EVP_PKEY_CTX * ctx, unsigned char key, size_t keylen)
173			{
174			int ret;
175			size_t outlen;
176			const EC_POINT *pubkey = NULL;
177			if (!ctx->pkey \|\| !ctx->peerkey) {
178			ECerror(EC_R_KEYS_NOT_SET);
179			return 0;
180			}
181			if (!key) {
182			const EC_GROUP *group;
183			group = EC_KEY_get0_group(ctx->pkey->pkey.ec);
184			*keylen = (EC_GROUP_get_degree(group) + 7) / 8;
185			return 1;
186			}
187			pubkey = EC_KEY_get0_public_key(ctx->peerkey->pkey.ec);
188
189			/*
190			* NB: unlike PKCS#3 DH, if *outlen is less than maximum size this is
191			* not an error, the result is truncated.
192			*/
193
194			outlen = *keylen;
195
196			ret = ECDH_compute_key(key, outlen, pubkey, ctx->pkey->pkey.ec, 0);
197			if (ret < 0)
198			return ret;
199			*keylen = ret;
200			return 1;
201			}
202
203			static int
204			pkey_ec_ctrl(EVP_PKEY_CTX * ctx, int type, int p1, void *p2)
205			{
206		4	EC_PKEY_CTX *dctx = ctx->data;
207			EC_GROUP *group;
208	✓✗✗✗ ✗✗✗	2	switch (type) {
209			case EVP_PKEY_CTRL_EC_PARAMGEN_CURVE_NID:
210		2	group = EC_GROUP_new_by_curve_name(p1);
211	✗✓	2	if (group == NULL) {
212			ECerror(EC_R_INVALID_CURVE);
213			return 0;
214			}
215		2	EC_GROUP_free(dctx->gen_group);
216		2	dctx->gen_group = group;
217		2	return 1;
218
219			case EVP_PKEY_CTRL_MD:
220			if (EVP_MD_type((const EVP_MD *) p2) != NID_sha1 &&
221			EVP_MD_type((const EVP_MD *) p2) != NID_ecdsa_with_SHA1 &&
222			EVP_MD_type((const EVP_MD *) p2) != NID_sha224 &&
223			EVP_MD_type((const EVP_MD *) p2) != NID_sha256 &&
224			EVP_MD_type((const EVP_MD *) p2) != NID_sha384 &&
225			EVP_MD_type((const EVP_MD *) p2) != NID_sha512) {
226			ECerror(EC_R_INVALID_DIGEST_TYPE);
227			return 0;
228			}
229			dctx->md = p2;
230			return 1;
231
232			case EVP_PKEY_CTRL_PEER_KEY:
233			/* Default behaviour is OK */
234			case EVP_PKEY_CTRL_DIGESTINIT:
235			case EVP_PKEY_CTRL_PKCS7_SIGN:
236			case EVP_PKEY_CTRL_CMS_SIGN:
237			return 1;
238
239			default:
240			return -2;
241
242			}
243		2	}
244
245			static int
246			pkey_ec_ctrl_str(EVP_PKEY_CTX * ctx,
247			const char type, const char value)
248			{
249	✓✗	4	if (!strcmp(type, "ec_paramgen_curve")) {
250			int nid;
251		2	nid = EC_curve_nist2nid(value);
252	✓✗	2	if (nid == NID_undef)
253		2	nid = OBJ_sn2nid(value);
254	✗✓	2	if (nid == NID_undef)
255			nid = OBJ_ln2nid(value);
256	✗✓	2	if (nid == NID_undef) {
257			ECerror(EC_R_INVALID_CURVE);
258			return 0;
259			}
260		2	return EVP_PKEY_CTX_set_ec_paramgen_curve_nid(ctx, nid);
261			}
262			return -2;
263		2	}
264
265			static int
266			pkey_ec_paramgen(EVP_PKEY_CTX * ctx, EVP_PKEY * pkey)
267			{
268			EC_KEY *ec = NULL;
269		4	EC_PKEY_CTX *dctx = ctx->data;
270			int ret = 0;
271	✗✓	2	if (dctx->gen_group == NULL) {
272			ECerror(EC_R_NO_PARAMETERS_SET);
273			return 0;
274			}
275		2	ec = EC_KEY_new();
276	✗✓	2	if (!ec)
277			return 0;
278		2	ret = EC_KEY_set_group(ec, dctx->gen_group);
279	✓✗	2	if (ret)
280		2	EVP_PKEY_assign_EC_KEY(pkey, ec);
281			else
282			EC_KEY_free(ec);
283		2	return ret;
284		2	}
285
286			static int
287			pkey_ec_keygen(EVP_PKEY_CTX * ctx, EVP_PKEY * pkey)
288			{
289			EC_KEY *ec = NULL;
290	✗✓	4	if (ctx->pkey == NULL) {
291			ECerror(EC_R_NO_PARAMETERS_SET);
292			return 0;
293			}
294		2	ec = EC_KEY_new();
295	✗✓	2	if (!ec)
296			return 0;
297		2	EVP_PKEY_assign_EC_KEY(pkey, ec);
298			/* Note: if error return, pkey is freed by parent routine */
299	✗✓	2	if (!EVP_PKEY_copy_parameters(pkey, ctx->pkey))
300			return 0;
301		2	return EC_KEY_generate_key(pkey->pkey.ec);
302		2	}
303
304			const EVP_PKEY_METHOD ec_pkey_meth = {
305			.pkey_id = EVP_PKEY_EC,
306
307			.init = pkey_ec_init,
308			.copy = pkey_ec_copy,
309			.cleanup = pkey_ec_cleanup,
310
311			.paramgen = pkey_ec_paramgen,
312
313			.keygen = pkey_ec_keygen,
314
315			.sign = pkey_ec_sign,
316
317			.verify = pkey_ec_verify,
318
319			.derive = pkey_ec_derive,
320
321			.ctrl = pkey_ec_ctrl,
322			.ctrl_str = pkey_ec_ctrl_str
323			};