[thirdparty/openssl.git] / providers / common / macs / gmac_prov.c

/*
 * Copyright 2018 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the Apache License 2.0 (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

#include <stdlib.h>
#include <openssl/core_numbers.h>
#include <openssl/core_names.h>
#include <openssl/params.h>
#include <openssl/engine.h>
#include <openssl/evp.h>
#include <openssl/err.h>

#include "internal/providercommonerr.h"
#include "internal/provider_algs.h"
#include "internal/provider_ctx.h"
#include "internal/provider_util.h"

/*
 * Forward declaration of everything implemented here.  This is not strictly
 * necessary for the compiler, but provides an assurance that the signatures
 * of the functions in the dispatch table are correct.
 */
static OSSL_OP_mac_newctx_fn gmac_new;
static OSSL_OP_mac_dupctx_fn gmac_dup;
static OSSL_OP_mac_freectx_fn gmac_free;
static OSSL_OP_mac_gettable_params_fn gmac_gettable_params;
static OSSL_OP_mac_get_params_fn gmac_get_params;
static OSSL_OP_mac_settable_ctx_params_fn gmac_settable_ctx_params;
static OSSL_OP_mac_set_ctx_params_fn gmac_set_ctx_params;
static OSSL_OP_mac_init_fn gmac_init;
static OSSL_OP_mac_update_fn gmac_update;
static OSSL_OP_mac_final_fn gmac_final;

/* local GMAC pkey structure */

struct gmac_data_st {
    void *provctx;
    EVP_CIPHER_CTX *ctx;         /* Cipher context */
    PROV_CIPHER cipher;
};

static size_t gmac_size(void);

static void gmac_free(void *vmacctx)
{
    struct gmac_data_st *macctx = vmacctx;

    if (macctx != NULL) {
        EVP_CIPHER_CTX_free(macctx->ctx);
        ossl_prov_cipher_reset(&macctx->cipher);
        OPENSSL_free(macctx);
    }
}

static void *gmac_new(void *provctx)
{
    struct gmac_data_st *macctx;

    if ((macctx = OPENSSL_zalloc(sizeof(*macctx))) == NULL
        || (macctx->ctx = EVP_CIPHER_CTX_new()) == NULL) {
        gmac_free(macctx);
        return NULL;
    }
    macctx->provctx = provctx;

    return macctx;
}

static void *gmac_dup(void *vsrc)
{
    struct gmac_data_st *src = vsrc;
    struct gmac_data_st *dst = gmac_new(src->provctx);

    if (dst == NULL)
        return NULL;

    if (!EVP_CIPHER_CTX_copy(dst->ctx, src->ctx)
        || !ossl_prov_cipher_copy(&dst->cipher, &src->cipher)) {
        gmac_free(dst);
        return NULL;
    }
    return dst;
}

static int gmac_init(void *vmacctx)
{
    return 1;
}

static int gmac_update(void *vmacctx, const unsigned char *data,
                       size_t datalen)
{
    struct gmac_data_st *macctx = vmacctx;
    EVP_CIPHER_CTX *ctx = macctx->ctx;
    int outlen;

    while (datalen > INT_MAX) {
        if (!EVP_EncryptUpdate(ctx, NULL, &outlen, data, INT_MAX))
            return 0;
        data += INT_MAX;
        datalen -= INT_MAX;
    }
    return EVP_EncryptUpdate(ctx, NULL, &outlen, data, datalen);
}

static int gmac_final(void *vmacctx, unsigned char *out, size_t *outl,
                      size_t outsize)
{
    struct gmac_data_st *macctx = vmacctx;
    int hlen = 0;

    if (!EVP_EncryptFinal_ex(macctx->ctx, out, &hlen))
        return 0;

    /* TODO(3.0) Use params */
    hlen = gmac_size();
    if (!EVP_CIPHER_CTX_ctrl(macctx->ctx, EVP_CTRL_AEAD_GET_TAG,
                             hlen, out))
        return 0;

    *outl = hlen;
    return 1;
}

static size_t gmac_size(void)
{
    return EVP_GCM_TLS_TAG_LEN;
}

static const OSSL_PARAM known_gettable_params[] = {
    OSSL_PARAM_size_t(OSSL_MAC_PARAM_SIZE, NULL),
    OSSL_PARAM_END
};
static const OSSL_PARAM *gmac_gettable_params(void)
{
    return known_gettable_params;
}

static int gmac_get_params(OSSL_PARAM params[])
{
    OSSL_PARAM *p;

    if ((p = OSSL_PARAM_locate(params, OSSL_MAC_PARAM_SIZE)) != NULL)
        return OSSL_PARAM_set_size_t(p, gmac_size());

    return 1;
}

static const OSSL_PARAM known_settable_ctx_params[] = {
    OSSL_PARAM_utf8_string(OSSL_MAC_PARAM_CIPHER, NULL, 0),
    OSSL_PARAM_utf8_string(OSSL_MAC_PARAM_ENGINE, NULL, 0),
    OSSL_PARAM_utf8_string(OSSL_MAC_PARAM_PROPERTIES, NULL, 0),
    OSSL_PARAM_octet_string(OSSL_MAC_PARAM_KEY, NULL, 0),
    OSSL_PARAM_octet_string(OSSL_MAC_PARAM_IV, NULL, 0),
    OSSL_PARAM_END
};
static const OSSL_PARAM *gmac_settable_ctx_params(void)
{
    return known_settable_ctx_params;
}

/*
 * ALL parameters should be set before init().
 */
static int gmac_set_ctx_params(void *vmacctx, const OSSL_PARAM params[])
{
    struct gmac_data_st *macctx = vmacctx;
    EVP_CIPHER_CTX *ctx = macctx->ctx;
    OPENSSL_CTX *provctx = PROV_LIBRARY_CONTEXT_OF(macctx->provctx);
    const OSSL_PARAM *p;

   if (!ossl_prov_cipher_load_from_params(&macctx->cipher, params, provctx))
        return 0;

    if (EVP_CIPHER_mode(ossl_prov_cipher_cipher(&macctx->cipher))
        != EVP_CIPH_GCM_MODE) {
        ERR_raise(ERR_LIB_PROV, EVP_R_CIPHER_NOT_GCM_MODE);
        return 0;
    }
    if (!EVP_EncryptInit_ex(ctx, ossl_prov_cipher_cipher(&macctx->cipher),
                            ossl_prov_cipher_engine(&macctx->cipher), NULL,
                            NULL))
        return 0;

    if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_KEY)) != NULL) {
        if (p->data_type != OSSL_PARAM_OCTET_STRING)
            return 0;

        if (p->data_size != (size_t)EVP_CIPHER_CTX_key_length(ctx)) {
            ERR_raise(ERR_LIB_PROV, EVP_R_INVALID_KEY_LENGTH);
            return 0;
        }
        if (!EVP_EncryptInit_ex(ctx, NULL, NULL, p->data, NULL))
            return 0;
    }
    if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_IV)) != NULL) {
        if (p->data_type != OSSL_PARAM_OCTET_STRING)
            return 0;

        if (!EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_SET_IVLEN,
                                 p->data_size, NULL)
            || !EVP_EncryptInit_ex(ctx, NULL, NULL, NULL, p->data))
            return 0;
    }
    return 1;
}

const OSSL_DISPATCH gmac_functions[] = {
    { OSSL_FUNC_MAC_NEWCTX, (void (*)(void))gmac_new },
    { OSSL_FUNC_MAC_DUPCTX, (void (*)(void))gmac_dup },
    { OSSL_FUNC_MAC_FREECTX, (void (*)(void))gmac_free },
    { OSSL_FUNC_MAC_INIT, (void (*)(void))gmac_init },
    { OSSL_FUNC_MAC_UPDATE, (void (*)(void))gmac_update },
    { OSSL_FUNC_MAC_FINAL, (void (*)(void))gmac_final },
    { OSSL_FUNC_MAC_GETTABLE_PARAMS, (void (*)(void))gmac_gettable_params },
    { OSSL_FUNC_MAC_GET_PARAMS, (void (*)(void))gmac_get_params },
    { OSSL_FUNC_MAC_SETTABLE_CTX_PARAMS,
      (void (*)(void))gmac_settable_ctx_params },
    { OSSL_FUNC_MAC_SET_CTX_PARAMS, (void (*)(void))gmac_set_ctx_params },
    { 0, NULL }
};
Commit	Line	Data
d33313be RL	1	/*
	2	* Copyright 2018 The OpenSSL Project Authors. All Rights Reserved.
	3	*
	4	* Licensed under the Apache License 2.0 (the "License"). You may not use
	5	* this file except in compliance with the License. You can obtain a copy
	6	* in the file LICENSE in the source distribution or at
	7	* https://www.openssl.org/source/license.html
	8	*/
	9
	10	#include <stdlib.h>
	11	#include <openssl/core_numbers.h>
	12	#include <openssl/core_names.h>
	13	#include <openssl/params.h>
	14	#include <openssl/engine.h>
	15	#include <openssl/evp.h>
	16	#include <openssl/err.h>
	17
	18	#include "internal/providercommonerr.h"
	19	#include "internal/provider_algs.h"
	20	#include "internal/provider_ctx.h"
76497acf	21	#include "internal/provider_util.h"
d33313be RL	22
	23	/*
	24	* Forward declaration of everything implemented here. This is not strictly
	25	* necessary for the compiler, but provides an assurance that the signatures
	26	* of the functions in the dispatch table are correct.
	27	*/
	28	static OSSL_OP_mac_newctx_fn gmac_new;
	29	static OSSL_OP_mac_dupctx_fn gmac_dup;
	30	static OSSL_OP_mac_freectx_fn gmac_free;
	31	static OSSL_OP_mac_gettable_params_fn gmac_gettable_params;
	32	static OSSL_OP_mac_get_params_fn gmac_get_params;
	33	static OSSL_OP_mac_settable_ctx_params_fn gmac_settable_ctx_params;
92d9d0ae	34	static OSSL_OP_mac_set_ctx_params_fn gmac_set_ctx_params;
d33313be RL	35	static OSSL_OP_mac_init_fn gmac_init;
	36	static OSSL_OP_mac_update_fn gmac_update;
	37	static OSSL_OP_mac_final_fn gmac_final;
	38
	39	/* local GMAC pkey structure */
	40
	41	struct gmac_data_st {
	42	void *provctx;
	43	EVP_CIPHER_CTX ctx; / Cipher context */
76497acf	44	PROV_CIPHER cipher;
d33313be RL	45	};
	46
	47	static size_t gmac_size(void);
	48
	49	static void gmac_free(void *vmacctx)
	50	{
	51	struct gmac_data_st *macctx = vmacctx;
	52
	53	if (macctx != NULL) {
	54	EVP_CIPHER_CTX_free(macctx->ctx);
76497acf	55	ossl_prov_cipher_reset(&macctx->cipher);
d33313be RL	56	OPENSSL_free(macctx);
	57	}
	58	}
	59
	60	static void gmac_new(void provctx)
	61	{
	62	struct gmac_data_st *macctx;
	63
	64	if ((macctx = OPENSSL_zalloc(sizeof(*macctx))) == NULL
	65	\|\| (macctx->ctx = EVP_CIPHER_CTX_new()) == NULL) {
	66	gmac_free(macctx);
	67	return NULL;
	68	}
	69	macctx->provctx = provctx;
	70
	71	return macctx;
	72	}
	73
	74	static void gmac_dup(void vsrc)
	75	{
	76	struct gmac_data_st *src = vsrc;
	77	struct gmac_data_st *dst = gmac_new(src->provctx);
	78
	79	if (dst == NULL)
	80	return NULL;
	81
	82	if (!EVP_CIPHER_CTX_copy(dst->ctx, src->ctx)
76497acf	83	\|\| !ossl_prov_cipher_copy(&dst->cipher, &src->cipher)) {
d33313be RL	84	gmac_free(dst);
	85	return NULL;
	86	}
d33313be RL	87	return dst;
	88	}
	89
	90	static int gmac_init(void *vmacctx)
	91	{
	92	return 1;
	93	}
	94
	95	static int gmac_update(void vmacctx, const unsigned char data,
	96	size_t datalen)
	97	{
	98	struct gmac_data_st *macctx = vmacctx;
	99	EVP_CIPHER_CTX *ctx = macctx->ctx;
	100	int outlen;
	101
	102	while (datalen > INT_MAX) {
	103	if (!EVP_EncryptUpdate(ctx, NULL, &outlen, data, INT_MAX))
	104	return 0;
	105	data += INT_MAX;
	106	datalen -= INT_MAX;
	107	}
	108	return EVP_EncryptUpdate(ctx, NULL, &outlen, data, datalen);
	109	}
	110
	111	static int gmac_final(void vmacctx, unsigned char out, size_t *outl,
	112	size_t outsize)
	113	{
	114	struct gmac_data_st *macctx = vmacctx;
	115	int hlen = 0;
	116
	117	if (!EVP_EncryptFinal_ex(macctx->ctx, out, &hlen))
	118	return 0;
	119
	120	/* TODO(3.0) Use params */
	121	hlen = gmac_size();
	122	if (!EVP_CIPHER_CTX_ctrl(macctx->ctx, EVP_CTRL_AEAD_GET_TAG,
	123	hlen, out))
	124	return 0;
	125
	126	*outl = hlen;
	127	return 1;
	128	}
	129
	130	static size_t gmac_size(void)
	131	{
	132	return EVP_GCM_TLS_TAG_LEN;
	133	}
	134
	135	static const OSSL_PARAM known_gettable_params[] = {
703170d4	136	OSSL_PARAM_size_t(OSSL_MAC_PARAM_SIZE, NULL),
d33313be RL	137	OSSL_PARAM_END
	138	};
	139	static const OSSL_PARAM *gmac_gettable_params(void)
	140	{
	141	return known_gettable_params;
	142	}
	143
	144	static int gmac_get_params(OSSL_PARAM params[])
	145	{
	146	OSSL_PARAM *p;
	147
703170d4	148	if ((p = OSSL_PARAM_locate(params, OSSL_MAC_PARAM_SIZE)) != NULL)
d33313be RL	149	return OSSL_PARAM_set_size_t(p, gmac_size());
	150
	151	return 1;
	152	}
	153
	154	static const OSSL_PARAM known_settable_ctx_params[] = {
d33313be RL	155	OSSL_PARAM_utf8_string(OSSL_MAC_PARAM_CIPHER, NULL, 0),
	156	OSSL_PARAM_utf8_string(OSSL_MAC_PARAM_ENGINE, NULL, 0),
	157	OSSL_PARAM_utf8_string(OSSL_MAC_PARAM_PROPERTIES, NULL, 0),
	158	OSSL_PARAM_octet_string(OSSL_MAC_PARAM_KEY, NULL, 0),
	159	OSSL_PARAM_octet_string(OSSL_MAC_PARAM_IV, NULL, 0),
	160	OSSL_PARAM_END
	161	};
	162	static const OSSL_PARAM *gmac_settable_ctx_params(void)
	163	{
	164	return known_settable_ctx_params;
	165	}
	166
	167	/*
	168	* ALL parameters should be set before init().
	169	*/
92d9d0ae	170	static int gmac_set_ctx_params(void *vmacctx, const OSSL_PARAM params[])
d33313be RL	171	{
	172	struct gmac_data_st *macctx = vmacctx;
	173	EVP_CIPHER_CTX *ctx = macctx->ctx;
76497acf	174	OPENSSL_CTX *provctx = PROV_LIBRARY_CONTEXT_OF(macctx->provctx);
d33313be RL	175	const OSSL_PARAM *p;
d33313be RL	176
76497acf P	177	if (!ossl_prov_cipher_load_from_params(&macctx->cipher, params, provctx))
76497acf P	178	return 0;
d33313be	179
76497acf P	180	if (EVP_CIPHER_mode(ossl_prov_cipher_cipher(&macctx->cipher))
	181	!= EVP_CIPH_GCM_MODE) {
	182	ERR_raise(ERR_LIB_PROV, EVP_R_CIPHER_NOT_GCM_MODE);
	183	return 0;
d33313be	184	}
76497acf P	185	if (!EVP_EncryptInit_ex(ctx, ossl_prov_cipher_cipher(&macctx->cipher),
	186	ossl_prov_cipher_engine(&macctx->cipher), NULL,
	187	NULL))
	188	return 0;
	189
d33313be RL	190	if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_KEY)) != NULL) {
	191	if (p->data_type != OSSL_PARAM_OCTET_STRING)
	192	return 0;
	193
	194	if (p->data_size != (size_t)EVP_CIPHER_CTX_key_length(ctx)) {
	195	ERR_raise(ERR_LIB_PROV, EVP_R_INVALID_KEY_LENGTH);
	196	return 0;
	197	}
	198	if (!EVP_EncryptInit_ex(ctx, NULL, NULL, p->data, NULL))
	199	return 0;
	200	}
	201	if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_IV)) != NULL) {
	202	if (p->data_type != OSSL_PARAM_OCTET_STRING)
	203	return 0;
	204
	205	if (!EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_SET_IVLEN,
	206	p->data_size, NULL)
	207	\|\| !EVP_EncryptInit_ex(ctx, NULL, NULL, NULL, p->data))
	208	return 0;
	209	}
	210	return 1;
	211	}
	212
	213	const OSSL_DISPATCH gmac_functions[] = {
	214	{ OSSL_FUNC_MAC_NEWCTX, (void (*)(void))gmac_new },
	215	{ OSSL_FUNC_MAC_DUPCTX, (void (*)(void))gmac_dup },
	216	{ OSSL_FUNC_MAC_FREECTX, (void (*)(void))gmac_free },
	217	{ OSSL_FUNC_MAC_INIT, (void (*)(void))gmac_init },
	218	{ OSSL_FUNC_MAC_UPDATE, (void (*)(void))gmac_update },
	219	{ OSSL_FUNC_MAC_FINAL, (void (*)(void))gmac_final },
	220	{ OSSL_FUNC_MAC_GETTABLE_PARAMS, (void (*)(void))gmac_gettable_params },
	221	{ OSSL_FUNC_MAC_GET_PARAMS, (void (*)(void))gmac_get_params },
	222	{ OSSL_FUNC_MAC_SETTABLE_CTX_PARAMS,
	223	(void (*)(void))gmac_settable_ctx_params },
92d9d0ae	224	{ OSSL_FUNC_MAC_SET_CTX_PARAMS, (void (*)(void))gmac_set_ctx_params },
d33313be RL	225	{ 0, NULL }
d33313be RL	226	};