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

/*
 * Written by Dr Stephen N Henson (steve@openssl.org) 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 "internal/cryptlib.h"
#include <openssl/x509.h>
#include <openssl/x509v3.h>
#include <openssl/evp.h>
#include <openssl/hmac.h>
#include "internal/evp_int.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(*hctx));
    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);
    if (!HMAC_CTX_copy(&dctx->ctx, &sctx->ctx))
        return 0;
    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);
    OPENSSL_clear_free(hctx->ktmp.data, hctx->ktmp.length);
    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;
    if (!HMAC_Update(&hctx->ctx, data, count))
        return 0;
    return 1;
}

static int hmac_signctx_init(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx)
{
    HMAC_PKEY_CTX *hctx = ctx->data;
    HMAC_CTX_set_flags(&hctx->ctx, mctx->flags & ~EVP_MD_CTX_FLAG_NO_INIT);
    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;
    int l = EVP_MD_CTX_size(mctx);

    if (l < 0)
        return 0;
    *siglen = l;
    if (!sig)
        return 1;

    if (!HMAC_Final(&hctx->ctx, sig, &hlen))
        return 0;
    *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;
        if (!HMAC_Init_ex(&hctx->ctx, key->data, key->length, hctx->md,
                          ctx->engine))
            return 0;
        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") == 0) {
        void *p = (void *)value;
        return pkey_hmac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY, -1, p);
    }
    if (strcmp(type, "hexkey") == 0) {
        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
0f113f3e MC	1	/*
	2	* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
	3	* 2007.
74633553 DSH	4	*/
	5	/* ====================================================================
	6	* Copyright (c) 2007 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
0f113f3e	13	* notice, this list of conditions and the following disclaimer.
74633553 DSH	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>
b39fc560	60	#include "internal/cryptlib.h"
74633553 DSH	61	#include <openssl/x509.h>
	62	#include <openssl/x509v3.h>
	63	#include <openssl/evp.h>
	64	#include <openssl/hmac.h>
27af42f9	65	#include "internal/evp_int.h"
74633553 DSH	66
	67	/* HMAC pkey context structure */
	68
0f113f3e MC	69	typedef struct {
	70	const EVP_MD md; / MD for HMAC use */
	71	ASN1_OCTET_STRING ktmp; /* Temp storage for key */
	72	HMAC_CTX ctx;
	73	} HMAC_PKEY_CTX;
74633553 DSH	74
74633553 DSH	75	static int pkey_hmac_init(EVP_PKEY_CTX *ctx)
0f113f3e MC	76	{
0f113f3e MC	77	HMAC_PKEY_CTX *hctx;
b4faea50	78	hctx = OPENSSL_malloc(sizeof(*hctx));
0f113f3e MC	79	if (!hctx)
	80	return 0;
	81	hctx->md = NULL;
	82	hctx->ktmp.data = NULL;
	83	hctx->ktmp.length = 0;
	84	hctx->ktmp.flags = 0;
	85	hctx->ktmp.type = V_ASN1_OCTET_STRING;
	86	HMAC_CTX_init(&hctx->ctx);
	87
	88	ctx->data = hctx;
	89	ctx->keygen_info_count = 0;
	90
	91	return 1;
	92	}
74633553 DSH	93
74633553 DSH	94	static int pkey_hmac_copy(EVP_PKEY_CTX dst, EVP_PKEY_CTX src)
0f113f3e MC	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	if (!HMAC_CTX_copy(&dctx->ctx, &sctx->ctx))
	104	return 0;
	105	if (sctx->ktmp.data) {
	106	if (!ASN1_OCTET_STRING_set(&dctx->ktmp,
	107	sctx->ktmp.data, sctx->ktmp.length))
	108	return 0;
	109	}
	110	return 1;
	111	}
74633553 DSH	112
74633553 DSH	113	static void pkey_hmac_cleanup(EVP_PKEY_CTX *ctx)
0f113f3e MC	114	{
0f113f3e MC	115	HMAC_PKEY_CTX *hctx = ctx->data;
4b45c6e5	116
0f113f3e	117	HMAC_CTX_cleanup(&hctx->ctx);
4b45c6e5	118	OPENSSL_clear_free(hctx->ktmp.data, hctx->ktmp.length);
0f113f3e MC	119	OPENSSL_free(hctx);
0f113f3e MC	120	}
74633553 DSH	121
74633553 DSH	122	static int pkey_hmac_keygen(EVP_PKEY_CTX ctx, EVP_PKEY pkey)
0f113f3e MC	123	{
	124	ASN1_OCTET_STRING *hkey = NULL;
	125	HMAC_PKEY_CTX *hctx = ctx->data;
	126	if (!hctx->ktmp.data)
	127	return 0;
	128	hkey = ASN1_OCTET_STRING_dup(&hctx->ktmp);
	129	if (!hkey)
	130	return 0;
	131	EVP_PKEY_assign(pkey, EVP_PKEY_HMAC, hkey);
	132
	133	return 1;
	134	}
	135
	136	static int int_update(EVP_MD_CTX ctx, const void data, size_t count)
	137	{
	138	HMAC_PKEY_CTX *hctx = ctx->pctx->data;
	139	if (!HMAC_Update(&hctx->ctx, data, count))
	140	return 0;
	141	return 1;
	142	}
74633553 DSH	143
74633553 DSH	144	static int hmac_signctx_init(EVP_PKEY_CTX ctx, EVP_MD_CTX mctx)
0f113f3e MC	145	{
	146	HMAC_PKEY_CTX *hctx = ctx->data;
	147	HMAC_CTX_set_flags(&hctx->ctx, mctx->flags & ~EVP_MD_CTX_FLAG_NO_INIT);
	148	EVP_MD_CTX_set_flags(mctx, EVP_MD_CTX_FLAG_NO_INIT);
	149	mctx->update = int_update;
	150	return 1;
	151	}
74633553 DSH	152
74633553 DSH	153	static int hmac_signctx(EVP_PKEY_CTX ctx, unsigned char sig, size_t *siglen,
0f113f3e MC	154	EVP_MD_CTX *mctx)
	155	{
	156	unsigned int hlen;
	157	HMAC_PKEY_CTX *hctx = ctx->data;
	158	int l = EVP_MD_CTX_size(mctx);
	159
	160	if (l < 0)
	161	return 0;
	162	*siglen = l;
	163	if (!sig)
	164	return 1;
	165
	166	if (!HMAC_Final(&hctx->ctx, sig, &hlen))
	167	return 0;
	168	*siglen = (size_t)hlen;
	169	return 1;
	170	}
74633553 DSH	171
74633553 DSH	172	static int pkey_hmac_ctrl(EVP_PKEY_CTX ctx, int type, int p1, void p2)
0f113f3e MC	173	{
	174	HMAC_PKEY_CTX *hctx = ctx->data;
	175	ASN1_OCTET_STRING *key;
	176	switch (type) {
	177
	178	case EVP_PKEY_CTRL_SET_MAC_KEY:
	179	if ((!p2 && p1 > 0) \|\| (p1 < -1))
	180	return 0;
	181	if (!ASN1_OCTET_STRING_set(&hctx->ktmp, p2, p1))
	182	return 0;
	183	break;
	184
	185	case EVP_PKEY_CTRL_MD:
	186	hctx->md = p2;
	187	break;
	188
	189	case EVP_PKEY_CTRL_DIGESTINIT:
	190	key = (ASN1_OCTET_STRING *)ctx->pkey->pkey.ptr;
	191	if (!HMAC_Init_ex(&hctx->ctx, key->data, key->length, hctx->md,
	192	ctx->engine))
	193	return 0;
	194	break;
	195
	196	default:
	197	return -2;
	198
	199	}
	200	return 1;
	201	}
74633553 DSH	202
74633553 DSH	203	static int pkey_hmac_ctrl_str(EVP_PKEY_CTX *ctx,
0f113f3e MC	204	const char type, const char value)
	205	{
	206	if (!value) {
	207	return 0;
	208	}
86885c28	209	if (strcmp(type, "key") == 0) {
0f113f3e MC	210	void p = (void )value;
	211	return pkey_hmac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY, -1, p);
	212	}
86885c28	213	if (strcmp(type, "hexkey") == 0) {
0f113f3e MC	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	EVP_PKEY_HMAC,
	229	0,
	230	pkey_hmac_init,
	231	pkey_hmac_copy,
	232	pkey_hmac_cleanup,
	233
	234	0, 0,
	235
	236	0,
	237	pkey_hmac_keygen,
	238
	239	0, 0,
	240
	241	0, 0,
	242
	243	0, 0,
	244
	245	hmac_signctx_init,
	246	hmac_signctx,
	247
	248	0, 0,
	249
	250	0, 0,
	251
	252	0, 0,
	253
	254	0, 0,
	255
	256	pkey_hmac_ctrl,
	257	pkey_hmac_ctrl_str
	258	};