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/*
* 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 <openssl/opensslconf.h>
#ifndef OPENSSL_NO_SIPHASH
# include <string.h>
# include <openssl/core_numbers.h>
# include <openssl/core_names.h>
# include <openssl/params.h>
# include <openssl/evp.h>
# include <openssl/err.h>
# include "internal/siphash.h"
/*
* TODO(3.0) when siphash has moved entirely to our providers, this
* header should be moved to the provider include directory. For the
* moment, crypto/siphash/siphash_ameth.c has us stuck.
*/
# include "../../../crypto/siphash/siphash_local.h"
# include "internal/providercommonerr.h"
# include "internal/provider_algs.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 siphash_new;
static OSSL_OP_mac_dupctx_fn siphash_dup;
static OSSL_OP_mac_freectx_fn siphash_free;
static OSSL_OP_mac_gettable_ctx_params_fn siphash_gettable_ctx_params;
static OSSL_OP_mac_ctx_get_params_fn siphash_ctx_get_params;
static OSSL_OP_mac_settable_ctx_params_fn siphash_settable_params;
static OSSL_OP_mac_ctx_set_params_fn siphash_set_params;
static OSSL_OP_mac_size_fn siphash_size;
static OSSL_OP_mac_init_fn siphash_init;
static OSSL_OP_mac_update_fn siphash_update;
static OSSL_OP_mac_final_fn siphash_final;
struct siphash_data_st {
void *provctx;
SIPHASH siphash; /* Siphash data */
};
static void *siphash_new(void *provctx)
{
struct siphash_data_st *ctx = OPENSSL_zalloc(sizeof(*ctx));
ctx->provctx = provctx;
return ctx;
}
static void siphash_free(void *vmacctx)
{
OPENSSL_free(vmacctx);
}
static void *siphash_dup(void *vsrc)
{
struct siphash_data_st *ssrc = vsrc;
struct siphash_data_st *sdst = siphash_new(ssrc->provctx);
if (sdst == NULL)
return NULL;
sdst->siphash = ssrc->siphash;
return sdst;
}
static size_t siphash_size(void *vmacctx)
{
struct siphash_data_st *ctx = vmacctx;
return SipHash_hash_size(&ctx->siphash);
}
static int siphash_init(void *vmacctx)
{
/* Not much to do here, actual initialization happens through controls */
return 1;
}
static int siphash_update(void *vmacctx, const unsigned char *data,
size_t datalen)
{
struct siphash_data_st *ctx = vmacctx;
SipHash_Update(&ctx->siphash, data, datalen);
return 1;
}
static int siphash_final(void *vmacctx, unsigned char *out, size_t *outl,
size_t outsize)
{
struct siphash_data_st *ctx = vmacctx;
size_t hlen = siphash_size(ctx);
if (outsize < hlen)
return 0;
*outl = hlen;
return SipHash_Final(&ctx->siphash, out, hlen);
}
static const OSSL_PARAM known_gettable_ctx_params[] = {
OSSL_PARAM_size_t(OSSL_MAC_PARAM_OUTLEN, NULL),
OSSL_PARAM_size_t(OSSL_MAC_PARAM_SIZE, NULL), /* Same as "outlen" */
OSSL_PARAM_size_t(OSSL_MAC_PARAM_DIGESTSIZE, NULL), /* Same as "outlen" */
OSSL_PARAM_END
};
static const OSSL_PARAM *siphash_gettable_ctx_params(void)
{
return known_gettable_ctx_params;
}
static int siphash_ctx_get_params(void *vmacctx, OSSL_PARAM params[])
{
OSSL_PARAM *p;
if ((p = OSSL_PARAM_locate(params, OSSL_MAC_PARAM_OUTLEN)) != NULL
|| (p = OSSL_PARAM_locate(params, OSSL_MAC_PARAM_SIZE)) != NULL
|| (p = OSSL_PARAM_locate(params, OSSL_MAC_PARAM_DIGESTSIZE)) != NULL)
return OSSL_PARAM_set_size_t(p, siphash_size(vmacctx));
return 1;
}
static const OSSL_PARAM known_settable_ctx_params[] = {
OSSL_PARAM_size_t(OSSL_MAC_PARAM_OUTLEN, NULL),
OSSL_PARAM_size_t(OSSL_MAC_PARAM_SIZE, NULL), /* Same as "outlen" */
OSSL_PARAM_size_t(OSSL_MAC_PARAM_DIGESTSIZE, NULL), /* Same as "outlen" */
OSSL_PARAM_octet_string(OSSL_MAC_PARAM_KEY, NULL, 0),
OSSL_PARAM_END
};
static const OSSL_PARAM *siphash_settable_params(void)
{
return known_settable_ctx_params;
}
static int siphash_set_params(void *vmacctx, const OSSL_PARAM *params)
{
struct siphash_data_st *ctx = vmacctx;
const OSSL_PARAM *p = NULL;
if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_OUTLEN)) != NULL
|| ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_DIGESTSIZE))
!= NULL)
|| ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_SIZE))
!= NULL)) {
size_t size;
if (!OSSL_PARAM_get_size_t(p, &size)
|| !SipHash_set_hash_size(&ctx->siphash, size))
return 0;
}
if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_KEY)) != NULL)
if (p->data_type != OSSL_PARAM_OCTET_STRING
|| p->data_size != SIPHASH_KEY_SIZE
|| !SipHash_Init(&ctx->siphash, p->data, 0, 0))
return 0;
return 1;
}
const OSSL_DISPATCH siphash_functions[] = {
{ OSSL_FUNC_MAC_NEWCTX, (void (*)(void))siphash_new },
{ OSSL_FUNC_MAC_DUPCTX, (void (*)(void))siphash_dup },
{ OSSL_FUNC_MAC_FREECTX, (void (*)(void))siphash_free },
{ OSSL_FUNC_MAC_INIT, (void (*)(void))siphash_init },
{ OSSL_FUNC_MAC_UPDATE, (void (*)(void))siphash_update },
{ OSSL_FUNC_MAC_FINAL, (void (*)(void))siphash_final },
{ OSSL_FUNC_MAC_GETTABLE_CTX_PARAMS,
(void (*)(void))siphash_gettable_ctx_params },
{ OSSL_FUNC_MAC_CTX_GET_PARAMS, (void (*)(void))siphash_ctx_get_params },
{ OSSL_FUNC_MAC_SETTABLE_CTX_PARAMS,
(void (*)(void))siphash_settable_params },
{ OSSL_FUNC_MAC_CTX_SET_PARAMS, (void (*)(void))siphash_set_params },
{ 0, NULL }
};
#endif
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