2 * Copyright 2018-2021 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>
16 #include <openssl/proverr.h>
18 #include "crypto/siphash.h"
20 #include "prov/implementations.h"
21 #include "prov/providercommon.h"
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.
28 static OSSL_FUNC_mac_newctx_fn siphash_new;
29 static OSSL_FUNC_mac_dupctx_fn siphash_dup;
30 static OSSL_FUNC_mac_freectx_fn siphash_free;
31 static OSSL_FUNC_mac_gettable_ctx_params_fn siphash_gettable_ctx_params;
32 static OSSL_FUNC_mac_get_ctx_params_fn siphash_get_ctx_params;
33 static OSSL_FUNC_mac_settable_ctx_params_fn siphash_settable_ctx_params;
34 static OSSL_FUNC_mac_set_ctx_params_fn siphash_set_params;
35 static OSSL_FUNC_mac_init_fn siphash_init;
36 static OSSL_FUNC_mac_update_fn siphash_update;
37 static OSSL_FUNC_mac_final_fn siphash_final;
39 struct siphash_data_st {
41 SIPHASH siphash; /* Siphash data */
42 unsigned int crounds, drounds;
45 static unsigned int crounds(struct siphash_data_st *ctx)
47 return ctx->crounds != 0 ? ctx->crounds : SIPHASH_C_ROUNDS;
50 static unsigned int drounds(struct siphash_data_st *ctx)
52 return ctx->drounds != 0 ? ctx->drounds : SIPHASH_D_ROUNDS;
55 static void *siphash_new(void *provctx)
57 struct siphash_data_st *ctx;
59 if (!ossl_prov_is_running())
61 ctx = OPENSSL_zalloc(sizeof(*ctx));
63 ctx->provctx = provctx;
67 static void siphash_free(void *vmacctx)
69 OPENSSL_free(vmacctx);
72 static void *siphash_dup(void *vsrc)
74 struct siphash_data_st *ssrc = vsrc;
75 struct siphash_data_st *sdst;
77 if (!ossl_prov_is_running())
79 sdst = siphash_new(ssrc->provctx);
83 sdst->siphash = ssrc->siphash;
87 static size_t siphash_size(void *vmacctx)
89 struct siphash_data_st *ctx = vmacctx;
91 return SipHash_hash_size(&ctx->siphash);
94 static int siphash_setkey(struct siphash_data_st *ctx,
95 const unsigned char *key, size_t keylen)
97 if (keylen != SIPHASH_KEY_SIZE)
99 return SipHash_Init(&ctx->siphash, key, crounds(ctx), drounds(ctx));
102 static int siphash_init(void *vmacctx, const unsigned char *key, size_t keylen,
103 const OSSL_PARAM params[])
105 struct siphash_data_st *ctx = vmacctx;
107 if (!ossl_prov_is_running() || !siphash_set_params(ctx, params))
109 /* Without a key, there is not much to do here,
110 * The actual initialization happens through controls.
114 return siphash_setkey(ctx, key, keylen);
117 static int siphash_update(void *vmacctx, const unsigned char *data,
120 struct siphash_data_st *ctx = vmacctx;
125 SipHash_Update(&ctx->siphash, data, datalen);
129 static int siphash_final(void *vmacctx, unsigned char *out, size_t *outl,
132 struct siphash_data_st *ctx = vmacctx;
133 size_t hlen = siphash_size(ctx);
135 if (!ossl_prov_is_running() || outsize < hlen)
139 return SipHash_Final(&ctx->siphash, out, hlen);
142 static const OSSL_PARAM *siphash_gettable_ctx_params(ossl_unused void *ctx,
143 ossl_unused void *provctx)
145 static const OSSL_PARAM known_gettable_ctx_params[] = {
146 OSSL_PARAM_size_t(OSSL_MAC_PARAM_SIZE, NULL),
147 OSSL_PARAM_uint(OSSL_MAC_PARAM_C_ROUNDS, NULL),
148 OSSL_PARAM_uint(OSSL_MAC_PARAM_D_ROUNDS, NULL),
152 return known_gettable_ctx_params;
155 static int siphash_get_ctx_params(void *vmacctx, OSSL_PARAM params[])
157 struct siphash_data_st *ctx = vmacctx;
160 if ((p = OSSL_PARAM_locate(params, OSSL_MAC_PARAM_SIZE)) != NULL
161 && !OSSL_PARAM_set_size_t(p, siphash_size(vmacctx)))
163 if ((p = OSSL_PARAM_locate(params, OSSL_MAC_PARAM_C_ROUNDS)) != NULL
164 && !OSSL_PARAM_set_uint(p, crounds(ctx)))
166 if ((p = OSSL_PARAM_locate(params, OSSL_MAC_PARAM_D_ROUNDS)) != NULL
167 && !OSSL_PARAM_set_uint(p, drounds(ctx)))
172 static const OSSL_PARAM *siphash_settable_ctx_params(ossl_unused void *ctx,
175 static const OSSL_PARAM known_settable_ctx_params[] = {
176 OSSL_PARAM_size_t(OSSL_MAC_PARAM_SIZE, NULL),
177 OSSL_PARAM_octet_string(OSSL_MAC_PARAM_KEY, NULL, 0),
178 OSSL_PARAM_uint(OSSL_MAC_PARAM_C_ROUNDS, NULL),
179 OSSL_PARAM_uint(OSSL_MAC_PARAM_D_ROUNDS, NULL),
183 return known_settable_ctx_params;
186 static int siphash_set_params(void *vmacctx, const OSSL_PARAM *params)
188 struct siphash_data_st *ctx = vmacctx;
189 const OSSL_PARAM *p = NULL;
195 if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_SIZE)) != NULL) {
196 if (!OSSL_PARAM_get_size_t(p, &size)
197 || !SipHash_set_hash_size(&ctx->siphash, size))
200 if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_C_ROUNDS)) != NULL
201 && !OSSL_PARAM_get_uint(p, &ctx->crounds))
203 if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_D_ROUNDS)) != NULL
204 && !OSSL_PARAM_get_uint(p, &ctx->drounds))
206 if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_KEY)) != NULL)
207 if (p->data_type != OSSL_PARAM_OCTET_STRING
208 || !siphash_setkey(ctx, p->data, p->data_size))
213 const OSSL_DISPATCH ossl_siphash_functions[] = {
214 { OSSL_FUNC_MAC_NEWCTX, (void (*)(void))siphash_new },
215 { OSSL_FUNC_MAC_DUPCTX, (void (*)(void))siphash_dup },
216 { OSSL_FUNC_MAC_FREECTX, (void (*)(void))siphash_free },
217 { OSSL_FUNC_MAC_INIT, (void (*)(void))siphash_init },
218 { OSSL_FUNC_MAC_UPDATE, (void (*)(void))siphash_update },
219 { OSSL_FUNC_MAC_FINAL, (void (*)(void))siphash_final },
220 { OSSL_FUNC_MAC_GETTABLE_CTX_PARAMS,
221 (void (*)(void))siphash_gettable_ctx_params },
222 { OSSL_FUNC_MAC_GET_CTX_PARAMS, (void (*)(void))siphash_get_ctx_params },
223 { OSSL_FUNC_MAC_SETTABLE_CTX_PARAMS,
224 (void (*)(void))siphash_settable_ctx_params },
225 { OSSL_FUNC_MAC_SET_CTX_PARAMS, (void (*)(void))siphash_set_params },