[thirdparty/openssl.git] / crypto / hmac / hm_pmeth.c

/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
 * project 2007.
 */
/* ====================================================================
 * Copyright (c) 2007 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 "cryptlib.h"
#include <openssl/x509.h>
#include <openssl/x509v3.h>
#include <openssl/evp.h>
#include <openssl/hmac.h>
#include "evp_locl.h"

/* HMAC pkey context structure */

typedef struct
	{
	const EVP_MD *md;	/* MD for HMAC use */
	ASN1_OCTET_STRING ktmp; /* Temp storage for key */
	HMAC_CTX ctx;
	} HMAC_PKEY_CTX;

static int pkey_hmac_init(EVP_PKEY_CTX *ctx)
	{
	HMAC_PKEY_CTX *hctx;
	hctx = OPENSSL_malloc(sizeof(HMAC_PKEY_CTX));
	if (!hctx)
		return 0;
	hctx->md = NULL;
	hctx->ktmp.data = NULL;
	hctx->ktmp.length = 0;
	hctx->ktmp.flags = 0;
	hctx->ktmp.type = V_ASN1_OCTET_STRING;
	HMAC_CTX_init(&hctx->ctx);

	ctx->data = hctx;
	ctx->keygen_info_count = 0;

	return 1;
	}

static int pkey_hmac_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
	{
	HMAC_PKEY_CTX *sctx, *dctx;
	if (!pkey_hmac_init(dst))
		return 0;
       	sctx = src->data;
	dctx = dst->data;
	dctx->md = sctx->md;
	HMAC_CTX_init(&dctx->ctx);
	HMAC_CTX_copy(&dctx->ctx, &sctx->ctx);
	if (sctx->ktmp.data)
		{
		if (!ASN1_OCTET_STRING_set(&dctx->ktmp,
					sctx->ktmp.data, sctx->ktmp.length))
			return 0;
		}
	return 1;
	}

static void pkey_hmac_cleanup(EVP_PKEY_CTX *ctx)
	{
	HMAC_PKEY_CTX *hctx = ctx->data;
	HMAC_CTX_cleanup(&hctx->ctx);
	if (hctx->ktmp.data)
		{
		if (hctx->ktmp.length)
			OPENSSL_cleanse(hctx->ktmp.data, hctx->ktmp.length);
		OPENSSL_free(hctx->ktmp.data);
		hctx->ktmp.data = NULL;
		}
	OPENSSL_free(hctx);
	}

static int pkey_hmac_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
	{
	ASN1_OCTET_STRING *hkey = NULL;
	HMAC_PKEY_CTX *hctx = ctx->data;
	if (!hctx->ktmp.data)
		return 0;
	hkey = ASN1_OCTET_STRING_dup(&hctx->ktmp);
	if (!hkey)
		return 0;
	EVP_PKEY_assign(pkey, EVP_PKEY_HMAC, hkey);
	
	return 1;
	}

static int int_update(EVP_MD_CTX *ctx,const void *data,size_t count)
	{
	HMAC_PKEY_CTX *hctx = ctx->pctx->data;
	HMAC_Update(&hctx->ctx, data, count);
	return 1;
	}

static int hmac_signctx_init(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx)
	{
	EVP_MD_CTX_set_flags(mctx, EVP_MD_CTX_FLAG_NO_INIT);
	mctx->update = int_update;
	return 1;
	}

static int hmac_signctx(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
					EVP_MD_CTX *mctx)
	{
	unsigned int hlen;
	HMAC_PKEY_CTX *hctx = ctx->data;
	*siglen = EVP_MD_CTX_size(mctx);
	if (!sig)
		return 1;

	HMAC_Final(&hctx->ctx, sig, &hlen);
	*siglen = (size_t)hlen;
	return 1;
	}

static int pkey_hmac_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
	{
	HMAC_PKEY_CTX *hctx = ctx->data;
	ASN1_OCTET_STRING *key;
	switch (type)
		{

		case EVP_PKEY_CTRL_SET_MAC_KEY:
		if ((!p2 && p1 > 0) || (p1 < -1))
			return 0;
		if (!ASN1_OCTET_STRING_set(&hctx->ktmp, p2, p1))
			return 0;
		break;

		case EVP_PKEY_CTRL_MD:
		hctx->md = p2;
		break;

		case EVP_PKEY_CTRL_DIGESTINIT:
		key = (ASN1_OCTET_STRING *)ctx->pkey->pkey.ptr;
		HMAC_Init_ex(&hctx->ctx, key->data, key->length, hctx->md,
				ctx->engine);
		break;

		default:
		return -2;

		}
	return 1;
	}

static int pkey_hmac_ctrl_str(EVP_PKEY_CTX *ctx,
			const char *type, const char *value)
	{
	if (!value)
		{
		return 0;
		}
	if (!strcmp(type, "key"))
		{
		return pkey_hmac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY,
				-1, (void *)value);
		}
	if (!strcmp(type, "hexkey"))
		{
		unsigned char *key;
		int r;
		long keylen;
		key = string_to_hex(value, &keylen);
		if (!key)
			return 0;
		r = pkey_hmac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY, keylen, key);
		OPENSSL_free(key);
		return r;
		}
	return -2;
	}

const EVP_PKEY_METHOD hmac_pkey_meth = 
	{
	EVP_PKEY_HMAC,
	0,
	pkey_hmac_init,
	pkey_hmac_copy,
	pkey_hmac_cleanup,

	0, 0,

	0,
	pkey_hmac_keygen,

	0, 0,

	0, 0,

	0,0,

	hmac_signctx_init,
	hmac_signctx,

	0,0,

	0,0,

	0,0,

	0,0,

	pkey_hmac_ctrl,
	pkey_hmac_ctrl_str

	};
Commit	Line	Data
74633553 DSH	1	/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
	2	* project 2007.
	3	*/
	4	/* ====================================================================
	5	* Copyright (c) 2007 The OpenSSL Project. All rights reserved.
	6	*
	7	* Redistribution and use in source and binary forms, with or without
	8	* modification, are permitted provided that the following conditions
	9	* are met:
	10	*
	11	* 1. Redistributions of source code must retain the above copyright
	12	* notice, this list of conditions and the following disclaimer.
	13	*
	14	* 2. Redistributions in binary form must reproduce the above copyright
	15	* notice, this list of conditions and the following disclaimer in
	16	* the documentation and/or other materials provided with the
	17	* distribution.
	18	*
	19	* 3. All advertising materials mentioning features or use of this
	20	* software must display the following acknowledgment:
	21	* "This product includes software developed by the OpenSSL Project
	22	* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
	23	*
	24	* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
	25	* endorse or promote products derived from this software without
	26	* prior written permission. For written permission, please contact
	27	* licensing@OpenSSL.org.
	28	*
	29	* 5. Products derived from this software may not be called "OpenSSL"
	30	* nor may "OpenSSL" appear in their names without prior written
	31	* permission of the OpenSSL Project.
	32	*
	33	* 6. Redistributions of any form whatsoever must retain the following
	34	* acknowledgment:
	35	* "This product includes software developed by the OpenSSL Project
	36	* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
	37	*
	38	* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
	39	* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	40	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	41	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
	42	* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	43	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	44	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
	45	* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	46	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	47	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	48	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
	49	* OF THE POSSIBILITY OF SUCH DAMAGE.
	50	* ====================================================================
	51	*
	52	* This product includes cryptographic software written by Eric Young
	53	* (eay@cryptsoft.com). This product includes software written by Tim
	54	* Hudson (tjh@cryptsoft.com).
	55	*
	56	*/
	57
	58	#include <stdio.h>
	59	#include "cryptlib.h"
	60	#include <openssl/x509.h>
	61	#include <openssl/x509v3.h>
	62	#include <openssl/evp.h>
	63	#include <openssl/hmac.h>
	64	#include "evp_locl.h"
65
66	/* HMAC pkey context structure */
67
68	typedef struct
69	{
70	const EVP_MD md; / MD for HMAC use */
74633553 DSH	71	ASN1_OCTET_STRING ktmp; /* Temp storage for key */
	72	HMAC_CTX ctx;
	73	} HMAC_PKEY_CTX;
	74
	75	static int pkey_hmac_init(EVP_PKEY_CTX *ctx)
	76	{
	77	HMAC_PKEY_CTX *hctx;
	78	hctx = OPENSSL_malloc(sizeof(HMAC_PKEY_CTX));
	79	if (!hctx)
	80	return 0;
	81	hctx->md = NULL;
74633553	82	hctx->ktmp.data = NULL;
7b8b7973 DSH	83	hctx->ktmp.length = 0;
	84	hctx->ktmp.flags = 0;
	85	hctx->ktmp.type = V_ASN1_OCTET_STRING;
74633553 DSH	86	HMAC_CTX_init(&hctx->ctx);
	87
	88	ctx->data = hctx;
	89	ctx->keygen_info_count = 0;
7b8b7973	90
74633553 DSH	91	return 1;
	92	}
	93
	94	static int pkey_hmac_copy(EVP_PKEY_CTX dst, EVP_PKEY_CTX src)
	95	{
	96	HMAC_PKEY_CTX sctx, dctx;
	97	if (!pkey_hmac_init(dst))
	98	return 0;
	99	sctx = src->data;
	100	dctx = dst->data;
	101	dctx->md = sctx->md;
	102	HMAC_CTX_init(&dctx->ctx);
	103	HMAC_CTX_copy(&dctx->ctx, &sctx->ctx);
	104	if (sctx->ktmp.data)
	105	{
	106	if (!ASN1_OCTET_STRING_set(&dctx->ktmp,
	107	sctx->ktmp.data, sctx->ktmp.length))
	108	return 0;
	109	}
	110	return 1;
	111	}
	112
	113	static void pkey_hmac_cleanup(EVP_PKEY_CTX *ctx)
	114	{
	115	HMAC_PKEY_CTX *hctx = ctx->data;
	116	HMAC_CTX_cleanup(&hctx->ctx);
	117	if (hctx->ktmp.data)
	118	{
0e1dba93 DSH	119	if (hctx->ktmp.length)
0e1dba93 DSH	120	OPENSSL_cleanse(hctx->ktmp.data, hctx->ktmp.length);
74633553 DSH	121	OPENSSL_free(hctx->ktmp.data);
	122	hctx->ktmp.data = NULL;
	123	}
	124	OPENSSL_free(hctx);
	125	}
	126
	127	static int pkey_hmac_keygen(EVP_PKEY_CTX ctx, EVP_PKEY pkey)
	128	{
	129	ASN1_OCTET_STRING *hkey = NULL;
	130	HMAC_PKEY_CTX *hctx = ctx->data;
	131	if (!hctx->ktmp.data)
	132	return 0;
	133	hkey = ASN1_OCTET_STRING_dup(&hctx->ktmp);
	134	if (!hkey)
	135	return 0;
	136	EVP_PKEY_assign(pkey, EVP_PKEY_HMAC, hkey);
	137
	138	return 1;
	139	}
	140
	141	static int int_update(EVP_MD_CTX ctx,const void data,size_t count)
	142	{
	143	HMAC_PKEY_CTX *hctx = ctx->pctx->data;
	144	HMAC_Update(&hctx->ctx, data, count);
	145	return 1;
	146	}
	147
	148	static int hmac_signctx_init(EVP_PKEY_CTX ctx, EVP_MD_CTX mctx)
	149	{
74633553 DSH	150	EVP_MD_CTX_set_flags(mctx, EVP_MD_CTX_FLAG_NO_INIT);
	151	mctx->update = int_update;
	152	return 1;
	153	}
	154
	155	static int hmac_signctx(EVP_PKEY_CTX ctx, unsigned char sig, size_t *siglen,
	156	EVP_MD_CTX *mctx)
	157	{
	158	unsigned int hlen;
	159	HMAC_PKEY_CTX *hctx = ctx->data;
	160	*siglen = EVP_MD_CTX_size(mctx);
	161	if (!sig)
	162	return 1;
	163
	164	HMAC_Final(&hctx->ctx, sig, &hlen);
	165	*siglen = (size_t)hlen;
	166	return 1;
	167	}
	168
	169	static int pkey_hmac_ctrl(EVP_PKEY_CTX ctx, int type, int p1, void p2)
	170	{
	171	HMAC_PKEY_CTX *hctx = ctx->data;
	172	ASN1_OCTET_STRING *key;
	173	switch (type)
	174	{
	175
	176	case EVP_PKEY_CTRL_SET_MAC_KEY:
	177	if ((!p2 && p1 > 0) \|\| (p1 < -1))
	178	return 0;
	179	if (!ASN1_OCTET_STRING_set(&hctx->ktmp, p2, p1))
	180	return 0;
	181	break;
	182
	183	case EVP_PKEY_CTRL_MD:
	184	hctx->md = p2;
	185	break;
	186
	187	case EVP_PKEY_CTRL_DIGESTINIT:
	188	key = (ASN1_OCTET_STRING *)ctx->pkey->pkey.ptr;
	189	HMAC_Init_ex(&hctx->ctx, key->data, key->length, hctx->md,
	190	ctx->engine);
	191	break;
	192
	193	default:
	194	return -2;
	195
	196	}
	197	return 1;
	198	}
	199
	200	static int pkey_hmac_ctrl_str(EVP_PKEY_CTX *ctx,
	201	const char type, const char value)
	202	{
	203	if (!value)
	204	{
	205	return 0;
	206	}
	207	if (!strcmp(type, "key"))
	208	{
	209	return pkey_hmac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY,
	210	-1, (void *)value);
	211	}
	212	if (!strcmp(type, "hexkey"))
	213	{
214	unsigned char *key;
215	int r;
216	long keylen;
217	key = string_to_hex(value, &keylen);
218	if (!key)
219	return 0;
220	r = pkey_hmac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY, keylen, key);
221	OPENSSL_free(key);
222	return r;
223	}
224	return -2;
225	}
226
227	const EVP_PKEY_METHOD hmac_pkey_meth =
228	{
229	EVP_PKEY_HMAC,
230	0,
231	pkey_hmac_init,
232	pkey_hmac_copy,
233	pkey_hmac_cleanup,
234
235	0, 0,
236
237	0,
238	pkey_hmac_keygen,
239
240	0, 0,
241
242	0, 0,
243
244	0,0,
245
246	hmac_signctx_init,
247	hmac_signctx,
248
249	0,0,
250
251	0,0,
252
253	0,0,
254
255	0,0,
256
257	pkey_hmac_ctrl,
258	pkey_hmac_ctrl_str
259
260	};