2 * Copyright 2018-2020 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_dispatch.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 "prov/providercommonerr.h"
26 #include "prov/implementations.h"
27 #include "prov/providercommon.h"
30 * Forward declaration of everything implemented here. This is not strictly
31 * necessary for the compiler, but provides an assurance that the signatures
32 * of the functions in the dispatch table are correct.
34 static OSSL_FUNC_mac_newctx_fn siphash_new;
35 static OSSL_FUNC_mac_dupctx_fn siphash_dup;
36 static OSSL_FUNC_mac_freectx_fn siphash_free;
37 static OSSL_FUNC_mac_gettable_ctx_params_fn siphash_gettable_ctx_params;
38 static OSSL_FUNC_mac_get_ctx_params_fn siphash_get_ctx_params;
39 static OSSL_FUNC_mac_settable_ctx_params_fn siphash_settable_params;
40 static OSSL_FUNC_mac_set_ctx_params_fn siphash_set_params;
41 static OSSL_FUNC_mac_size_fn siphash_size;
42 static OSSL_FUNC_mac_init_fn siphash_init;
43 static OSSL_FUNC_mac_update_fn siphash_update;
44 static OSSL_FUNC_mac_final_fn siphash_final;
46 struct siphash_data_st {
48 SIPHASH siphash; /* Siphash data */
51 static void *siphash_new(void *provctx)
53 struct siphash_data_st *ctx;
55 if (!ossl_prov_is_running())
57 ctx = OPENSSL_zalloc(sizeof(*ctx));
59 ctx->provctx = provctx;
63 static void siphash_free(void *vmacctx)
65 OPENSSL_free(vmacctx);
68 static void *siphash_dup(void *vsrc)
70 struct siphash_data_st *ssrc = vsrc;
71 struct siphash_data_st *sdst;
73 if (!ossl_prov_is_running())
75 sdst = siphash_new(ssrc->provctx);
79 sdst->siphash = ssrc->siphash;
83 static size_t siphash_size(void *vmacctx)
85 struct siphash_data_st *ctx = vmacctx;
87 return SipHash_hash_size(&ctx->siphash);
90 static int siphash_init(void *vmacctx)
92 /* Not much to do here, actual initialization happens through controls */
93 return ossl_prov_is_running();
96 static int siphash_update(void *vmacctx, const unsigned char *data,
99 struct siphash_data_st *ctx = vmacctx;
104 SipHash_Update(&ctx->siphash, data, datalen);
108 static int siphash_final(void *vmacctx, unsigned char *out, size_t *outl,
111 struct siphash_data_st *ctx = vmacctx;
112 size_t hlen = siphash_size(ctx);
114 if (!ossl_prov_is_running() || outsize < hlen)
118 return SipHash_Final(&ctx->siphash, out, hlen);
121 static const OSSL_PARAM known_gettable_ctx_params[] = {
122 OSSL_PARAM_size_t(OSSL_MAC_PARAM_SIZE, NULL),
125 static const OSSL_PARAM *siphash_gettable_ctx_params(ossl_unused void *provctx)
127 return known_gettable_ctx_params;
130 static int siphash_get_ctx_params(void *vmacctx, OSSL_PARAM params[])
134 if ((p = OSSL_PARAM_locate(params, OSSL_MAC_PARAM_SIZE)) != NULL)
135 return OSSL_PARAM_set_size_t(p, siphash_size(vmacctx));
140 static const OSSL_PARAM known_settable_ctx_params[] = {
141 OSSL_PARAM_size_t(OSSL_MAC_PARAM_SIZE, NULL),
142 OSSL_PARAM_octet_string(OSSL_MAC_PARAM_KEY, NULL, 0),
145 static const OSSL_PARAM *siphash_settable_params(void *provctx)
147 return known_settable_ctx_params;
150 static int siphash_set_params(void *vmacctx, const OSSL_PARAM *params)
152 struct siphash_data_st *ctx = vmacctx;
153 const OSSL_PARAM *p = NULL;
155 if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_SIZE)) != NULL) {
158 if (!OSSL_PARAM_get_size_t(p, &size)
159 || !SipHash_set_hash_size(&ctx->siphash, size))
162 if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_KEY)) != NULL)
163 if (p->data_type != OSSL_PARAM_OCTET_STRING
164 || p->data_size != SIPHASH_KEY_SIZE
165 || !SipHash_Init(&ctx->siphash, p->data, 0, 0))
170 const OSSL_DISPATCH ossl_siphash_functions[] = {
171 { OSSL_FUNC_MAC_NEWCTX, (void (*)(void))siphash_new },
172 { OSSL_FUNC_MAC_DUPCTX, (void (*)(void))siphash_dup },
173 { OSSL_FUNC_MAC_FREECTX, (void (*)(void))siphash_free },
174 { OSSL_FUNC_MAC_INIT, (void (*)(void))siphash_init },
175 { OSSL_FUNC_MAC_UPDATE, (void (*)(void))siphash_update },
176 { OSSL_FUNC_MAC_FINAL, (void (*)(void))siphash_final },
177 { OSSL_FUNC_MAC_GETTABLE_CTX_PARAMS,
178 (void (*)(void))siphash_gettable_ctx_params },
179 { OSSL_FUNC_MAC_GET_CTX_PARAMS, (void (*)(void))siphash_get_ctx_params },
180 { OSSL_FUNC_MAC_SETTABLE_CTX_PARAMS,
181 (void (*)(void))siphash_settable_params },
182 { OSSL_FUNC_MAC_SET_CTX_PARAMS, (void (*)(void))siphash_set_params },