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
10 #include <openssl/core_dispatch.h>
11 #include <openssl/core_names.h>
12 #include <openssl/params.h>
14 #include "prov/blake2.h"
15 #include "internal/cryptlib.h"
16 #include "prov/providercommonerr.h"
17 #include "prov/implementations.h"
20 * Forward declaration of everything implemented here. This is not strictly
21 * necessary for the compiler, but provides an assurance that the signatures
22 * of the functions in the dispatch table are correct.
24 static OSSL_FUNC_mac_newctx_fn blake2_mac_new;
25 static OSSL_FUNC_mac_dupctx_fn blake2_mac_dup;
26 static OSSL_FUNC_mac_freectx_fn blake2_mac_free;
27 static OSSL_FUNC_mac_gettable_ctx_params_fn blake2_gettable_ctx_params;
28 static OSSL_FUNC_mac_get_ctx_params_fn blake2_get_ctx_params;
29 static OSSL_FUNC_mac_settable_ctx_params_fn blake2_mac_settable_ctx_params;
30 static OSSL_FUNC_mac_set_ctx_params_fn blake2_mac_set_ctx_params;
31 static OSSL_FUNC_mac_init_fn blake2_mac_init;
32 static OSSL_FUNC_mac_update_fn blake2_mac_update;
33 static OSSL_FUNC_mac_final_fn blake2_mac_final;
35 struct blake2_mac_data_st {
38 unsigned char key[BLAKE2_KEYBYTES];
41 static size_t blake2_mac_size(void *vmacctx);
43 static void *blake2_mac_new(void *unused_provctx)
45 struct blake2_mac_data_st *macctx = OPENSSL_zalloc(sizeof(*macctx));
48 BLAKE2_PARAM_INIT(&macctx->params);
49 /* ctx initialization is deferred to BLAKE2b_Init() */
54 static void *blake2_mac_dup(void *vsrc)
56 struct blake2_mac_data_st *dst;
57 struct blake2_mac_data_st *src = vsrc;
59 dst = OPENSSL_zalloc(sizeof(*dst));
67 static void blake2_mac_free(void *vmacctx)
69 struct blake2_mac_data_st *macctx = vmacctx;
72 OPENSSL_cleanse(macctx->key, sizeof(macctx->key));
77 static int blake2_mac_init(void *vmacctx)
79 struct blake2_mac_data_st *macctx = vmacctx;
81 /* Check key has been set */
82 if (macctx->params.key_length == 0) {
83 ERR_raise(ERR_LIB_PROV, PROV_R_NO_KEY_SET);
87 return BLAKE2_INIT_KEY(&macctx->ctx, &macctx->params, macctx->key);
90 static int blake2_mac_update(void *vmacctx,
91 const unsigned char *data, size_t datalen)
93 struct blake2_mac_data_st *macctx = vmacctx;
95 return BLAKE2_UPDATE(&macctx->ctx, data, datalen);
98 static int blake2_mac_final(void *vmacctx,
99 unsigned char *out, size_t *outl,
102 struct blake2_mac_data_st *macctx = vmacctx;
104 *outl = blake2_mac_size(macctx);
105 return BLAKE2_FINAL(out, &macctx->ctx);
108 static const OSSL_PARAM known_gettable_ctx_params[] = {
109 OSSL_PARAM_size_t(OSSL_MAC_PARAM_SIZE, NULL),
112 static const OSSL_PARAM *blake2_gettable_ctx_params(void *provctx)
114 return known_gettable_ctx_params;
117 static int blake2_get_ctx_params(void *vmacctx, OSSL_PARAM params[])
121 if ((p = OSSL_PARAM_locate(params, OSSL_MAC_PARAM_SIZE)) != NULL)
122 return OSSL_PARAM_set_size_t(p, blake2_mac_size(vmacctx));
127 static const OSSL_PARAM known_settable_ctx_params[] = {
128 OSSL_PARAM_size_t(OSSL_MAC_PARAM_SIZE, NULL),
129 OSSL_PARAM_octet_string(OSSL_MAC_PARAM_KEY, NULL, 0),
130 OSSL_PARAM_octet_string(OSSL_MAC_PARAM_CUSTOM, NULL, 0),
131 OSSL_PARAM_octet_string(OSSL_MAC_PARAM_SALT, NULL, 0),
134 static const OSSL_PARAM *blake2_mac_settable_ctx_params(void *provctx)
136 return known_settable_ctx_params;
140 * ALL parameters should be set before init().
142 static int blake2_mac_set_ctx_params(void *vmacctx, const OSSL_PARAM params[])
144 struct blake2_mac_data_st *macctx = vmacctx;
147 if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_SIZE)) != NULL) {
150 if (!OSSL_PARAM_get_size_t(p, &size)
152 || size > BLAKE2_OUTBYTES) {
153 ERR_raise(ERR_LIB_PROV, PROV_R_NOT_XOF_OR_INVALID_LENGTH);
156 BLAKE2_PARAM_SET_DIGEST_LENGTH(&macctx->params, (uint8_t)size);
159 if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_KEY)) != NULL) {
161 void *key_p = macctx->key;
163 if (!OSSL_PARAM_get_octet_string(p, &key_p, BLAKE2_KEYBYTES, &len)) {
164 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY_LENGTH);
167 /* Pad with zeroes at the end */
168 memset(macctx->key + len, 0, BLAKE2_KEYBYTES - len);
170 BLAKE2_PARAM_SET_KEY_LENGTH(&macctx->params, (uint8_t)len);
173 if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_CUSTOM))
176 * The OSSL_PARAM API doesn't provide direct pointer use, so we
177 * must handle the OSSL_PARAM structure ourselves here
179 if (p->data_size > BLAKE2_PERSONALBYTES) {
180 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_CUSTOM_LENGTH);
183 BLAKE2_PARAM_SET_PERSONAL(&macctx->params, p->data, p->data_size);
186 if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_SALT)) != NULL) {
188 * The OSSL_PARAM API doesn't provide direct pointer use, so we
189 * must handle the OSSL_PARAM structure ourselves here as well
191 if (p->data_size > BLAKE2_SALTBYTES) {
192 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_SALT_LENGTH);
195 BLAKE2_PARAM_SET_SALT(&macctx->params, p->data, p->data_size);
200 static size_t blake2_mac_size(void *vmacctx)
202 struct blake2_mac_data_st *macctx = vmacctx;
204 return macctx->params.digest_length;
207 const OSSL_DISPATCH BLAKE2_FUNCTIONS[] = {
208 { OSSL_FUNC_MAC_NEWCTX, (void (*)(void))blake2_mac_new },
209 { OSSL_FUNC_MAC_DUPCTX, (void (*)(void))blake2_mac_dup },
210 { OSSL_FUNC_MAC_FREECTX, (void (*)(void))blake2_mac_free },
211 { OSSL_FUNC_MAC_INIT, (void (*)(void))blake2_mac_init },
212 { OSSL_FUNC_MAC_UPDATE, (void (*)(void))blake2_mac_update },
213 { OSSL_FUNC_MAC_FINAL, (void (*)(void))blake2_mac_final },
214 { OSSL_FUNC_MAC_GETTABLE_CTX_PARAMS,
215 (void (*)(void))blake2_gettable_ctx_params },
216 { OSSL_FUNC_MAC_GET_CTX_PARAMS, (void (*)(void))blake2_get_ctx_params },
217 { OSSL_FUNC_MAC_SETTABLE_CTX_PARAMS,
218 (void (*)(void))blake2_mac_settable_ctx_params },
219 { OSSL_FUNC_MAC_SET_CTX_PARAMS, (void (*)(void))blake2_mac_set_ctx_params },