2 * Copyright 2018 The OpenSSL Project Authors. All Rights Reserved.
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
10 #include <openssl/opensslconf.h>
11 #ifndef OPENSSL_NO_SIPHASH
14 # include <openssl/core_numbers.h>
15 # include <openssl/core_names.h>
16 # include <openssl/params.h>
17 # include <openssl/evp.h>
18 # include <openssl/err.h>
20 # include "internal/siphash.h"
22 * TODO(3.0) when siphash has moved entirely to our providers, this
23 * header should be moved to the provider include directory. For the
24 * moment, crypto/siphash/siphash_ameth.c has us stuck.
26 # include "../../../crypto/siphash/siphash_local.h"
28 # include "internal/providercommonerr.h"
29 # include "internal/provider_algs.h"
32 * Forward declaration of everything implemented here. This is not strictly
33 * necessary for the compiler, but provides an assurance that the signatures
34 * of the functions in the dispatch table are correct.
36 static OSSL_OP_mac_newctx_fn siphash_new;
37 static OSSL_OP_mac_dupctx_fn siphash_dup;
38 static OSSL_OP_mac_freectx_fn siphash_free;
39 static OSSL_OP_mac_gettable_ctx_params_fn siphash_gettable_ctx_params;
40 static OSSL_OP_mac_get_ctx_params_fn siphash_get_ctx_params;
41 static OSSL_OP_mac_settable_ctx_params_fn siphash_settable_params;
42 static OSSL_OP_mac_set_ctx_params_fn siphash_set_params;
43 static OSSL_OP_mac_size_fn siphash_size;
44 static OSSL_OP_mac_init_fn siphash_init;
45 static OSSL_OP_mac_update_fn siphash_update;
46 static OSSL_OP_mac_final_fn siphash_final;
48 struct siphash_data_st {
50 SIPHASH siphash; /* Siphash data */
53 static void *siphash_new(void *provctx)
55 struct siphash_data_st *ctx = OPENSSL_zalloc(sizeof(*ctx));
57 ctx->provctx = provctx;
61 static void siphash_free(void *vmacctx)
63 OPENSSL_free(vmacctx);
66 static void *siphash_dup(void *vsrc)
68 struct siphash_data_st *ssrc = vsrc;
69 struct siphash_data_st *sdst = siphash_new(ssrc->provctx);
74 sdst->siphash = ssrc->siphash;
78 static size_t siphash_size(void *vmacctx)
80 struct siphash_data_st *ctx = vmacctx;
82 return SipHash_hash_size(&ctx->siphash);
85 static int siphash_init(void *vmacctx)
87 /* Not much to do here, actual initialization happens through controls */
91 static int siphash_update(void *vmacctx, const unsigned char *data,
94 struct siphash_data_st *ctx = vmacctx;
96 SipHash_Update(&ctx->siphash, data, datalen);
100 static int siphash_final(void *vmacctx, unsigned char *out, size_t *outl,
103 struct siphash_data_st *ctx = vmacctx;
104 size_t hlen = siphash_size(ctx);
110 return SipHash_Final(&ctx->siphash, out, hlen);
113 static const OSSL_PARAM known_gettable_ctx_params[] = {
114 OSSL_PARAM_size_t(OSSL_MAC_PARAM_SIZE, NULL),
117 static const OSSL_PARAM *siphash_gettable_ctx_params(void)
119 return known_gettable_ctx_params;
122 static int siphash_get_ctx_params(void *vmacctx, OSSL_PARAM params[])
126 if ((p = OSSL_PARAM_locate(params, OSSL_MAC_PARAM_SIZE)) != NULL)
127 return OSSL_PARAM_set_size_t(p, siphash_size(vmacctx));
132 static const OSSL_PARAM known_settable_ctx_params[] = {
133 OSSL_PARAM_size_t(OSSL_MAC_PARAM_SIZE, NULL),
134 OSSL_PARAM_octet_string(OSSL_MAC_PARAM_KEY, NULL, 0),
137 static const OSSL_PARAM *siphash_settable_params(void)
139 return known_settable_ctx_params;
142 static int siphash_set_params(void *vmacctx, const OSSL_PARAM *params)
144 struct siphash_data_st *ctx = vmacctx;
145 const OSSL_PARAM *p = NULL;
147 if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_SIZE)) != NULL) {
150 if (!OSSL_PARAM_get_size_t(p, &size)
151 || !SipHash_set_hash_size(&ctx->siphash, size))
154 if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_KEY)) != NULL)
155 if (p->data_type != OSSL_PARAM_OCTET_STRING
156 || p->data_size != SIPHASH_KEY_SIZE
157 || !SipHash_Init(&ctx->siphash, p->data, 0, 0))
162 const OSSL_DISPATCH siphash_functions[] = {
163 { OSSL_FUNC_MAC_NEWCTX, (void (*)(void))siphash_new },
164 { OSSL_FUNC_MAC_DUPCTX, (void (*)(void))siphash_dup },
165 { OSSL_FUNC_MAC_FREECTX, (void (*)(void))siphash_free },
166 { OSSL_FUNC_MAC_INIT, (void (*)(void))siphash_init },
167 { OSSL_FUNC_MAC_UPDATE, (void (*)(void))siphash_update },
168 { OSSL_FUNC_MAC_FINAL, (void (*)(void))siphash_final },
169 { OSSL_FUNC_MAC_GETTABLE_CTX_PARAMS,
170 (void (*)(void))siphash_gettable_ctx_params },
171 { OSSL_FUNC_MAC_GET_CTX_PARAMS, (void (*)(void))siphash_get_ctx_params },
172 { OSSL_FUNC_MAC_SETTABLE_CTX_PARAMS,
173 (void (*)(void))siphash_settable_params },
174 { OSSL_FUNC_MAC_SET_CTX_PARAMS, (void (*)(void))siphash_set_params },