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
11 #include <openssl/core_numbers.h>
12 #include <openssl/core_names.h>
13 #include <openssl/params.h>
14 #include <openssl/evp.h>
15 #include <openssl/err.h>
17 #include "crypto/siphash.h"
19 * TODO(3.0) when siphash has moved entirely to our providers, this
20 * header should be moved to the provider include directory. For the
21 * moment, crypto/siphash/siphash_ameth.c has us stuck.
23 #include "../../../crypto/siphash/siphash_local.h"
25 #include "internal/providercommonerr.h"
26 #include "internal/provider_algs.h"
29 * Forward declaration of everything implemented here. This is not strictly
30 * necessary for the compiler, but provides an assurance that the signatures
31 * of the functions in the dispatch table are correct.
33 static OSSL_OP_mac_newctx_fn siphash_new;
34 static OSSL_OP_mac_dupctx_fn siphash_dup;
35 static OSSL_OP_mac_freectx_fn siphash_free;
36 static OSSL_OP_mac_gettable_ctx_params_fn siphash_gettable_ctx_params;
37 static OSSL_OP_mac_get_ctx_params_fn siphash_get_ctx_params;
38 static OSSL_OP_mac_settable_ctx_params_fn siphash_settable_params;
39 static OSSL_OP_mac_set_ctx_params_fn siphash_set_params;
40 static OSSL_OP_mac_size_fn siphash_size;
41 static OSSL_OP_mac_init_fn siphash_init;
42 static OSSL_OP_mac_update_fn siphash_update;
43 static OSSL_OP_mac_final_fn siphash_final;
45 struct siphash_data_st {
47 SIPHASH siphash; /* Siphash data */
50 static void *siphash_new(void *provctx)
52 struct siphash_data_st *ctx = OPENSSL_zalloc(sizeof(*ctx));
54 ctx->provctx = provctx;
58 static void siphash_free(void *vmacctx)
60 OPENSSL_free(vmacctx);
63 static void *siphash_dup(void *vsrc)
65 struct siphash_data_st *ssrc = vsrc;
66 struct siphash_data_st *sdst = siphash_new(ssrc->provctx);
71 sdst->siphash = ssrc->siphash;
75 static size_t siphash_size(void *vmacctx)
77 struct siphash_data_st *ctx = vmacctx;
79 return SipHash_hash_size(&ctx->siphash);
82 static int siphash_init(void *vmacctx)
84 /* Not much to do here, actual initialization happens through controls */
88 static int siphash_update(void *vmacctx, const unsigned char *data,
91 struct siphash_data_st *ctx = vmacctx;
93 SipHash_Update(&ctx->siphash, data, datalen);
97 static int siphash_final(void *vmacctx, unsigned char *out, size_t *outl,
100 struct siphash_data_st *ctx = vmacctx;
101 size_t hlen = siphash_size(ctx);
107 return SipHash_Final(&ctx->siphash, out, hlen);
110 static const OSSL_PARAM known_gettable_ctx_params[] = {
111 OSSL_PARAM_size_t(OSSL_MAC_PARAM_SIZE, NULL),
114 static const OSSL_PARAM *siphash_gettable_ctx_params(void)
116 return known_gettable_ctx_params;
119 static int siphash_get_ctx_params(void *vmacctx, OSSL_PARAM params[])
123 if ((p = OSSL_PARAM_locate(params, OSSL_MAC_PARAM_SIZE)) != NULL)
124 return OSSL_PARAM_set_size_t(p, siphash_size(vmacctx));
129 static const OSSL_PARAM known_settable_ctx_params[] = {
130 OSSL_PARAM_size_t(OSSL_MAC_PARAM_SIZE, NULL),
131 OSSL_PARAM_octet_string(OSSL_MAC_PARAM_KEY, NULL, 0),
134 static const OSSL_PARAM *siphash_settable_params(void)
136 return known_settable_ctx_params;
139 static int siphash_set_params(void *vmacctx, const OSSL_PARAM *params)
141 struct siphash_data_st *ctx = vmacctx;
142 const OSSL_PARAM *p = NULL;
144 if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_SIZE)) != NULL) {
147 if (!OSSL_PARAM_get_size_t(p, &size)
148 || !SipHash_set_hash_size(&ctx->siphash, size))
151 if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_KEY)) != NULL)
152 if (p->data_type != OSSL_PARAM_OCTET_STRING
153 || p->data_size != SIPHASH_KEY_SIZE
154 || !SipHash_Init(&ctx->siphash, p->data, 0, 0))
159 const OSSL_DISPATCH siphash_functions[] = {
160 { OSSL_FUNC_MAC_NEWCTX, (void (*)(void))siphash_new },
161 { OSSL_FUNC_MAC_DUPCTX, (void (*)(void))siphash_dup },
162 { OSSL_FUNC_MAC_FREECTX, (void (*)(void))siphash_free },
163 { OSSL_FUNC_MAC_INIT, (void (*)(void))siphash_init },
164 { OSSL_FUNC_MAC_UPDATE, (void (*)(void))siphash_update },
165 { OSSL_FUNC_MAC_FINAL, (void (*)(void))siphash_final },
166 { OSSL_FUNC_MAC_GETTABLE_CTX_PARAMS,
167 (void (*)(void))siphash_gettable_ctx_params },
168 { OSSL_FUNC_MAC_GET_CTX_PARAMS, (void (*)(void))siphash_get_ctx_params },
169 { OSSL_FUNC_MAC_SETTABLE_CTX_PARAMS,
170 (void (*)(void))siphash_settable_params },
171 { OSSL_FUNC_MAC_SET_CTX_PARAMS, (void (*)(void))siphash_set_params },