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
10 #include <openssl/core_dispatch.h>
11 #include <openssl/core_names.h>
12 #include <openssl/params.h>
13 #include <openssl/proverr.h>
15 #include "prov/blake2.h"
16 #include "internal/cryptlib.h"
17 #include "prov/implementations.h"
18 #include "prov/providercommon.h"
21 * Forward declaration of everything implemented here. This is not strictly
22 * necessary for the compiler, but provides an assurance that the signatures
23 * of the functions in the dispatch table are correct.
25 static OSSL_FUNC_mac_newctx_fn blake2_mac_new;
26 static OSSL_FUNC_mac_dupctx_fn blake2_mac_dup;
27 static OSSL_FUNC_mac_freectx_fn blake2_mac_free;
28 static OSSL_FUNC_mac_gettable_ctx_params_fn blake2_gettable_ctx_params;
29 static OSSL_FUNC_mac_get_ctx_params_fn blake2_get_ctx_params;
30 static OSSL_FUNC_mac_settable_ctx_params_fn blake2_mac_settable_ctx_params;
31 static OSSL_FUNC_mac_set_ctx_params_fn blake2_mac_set_ctx_params;
32 static OSSL_FUNC_mac_init_fn blake2_mac_init;
33 static OSSL_FUNC_mac_update_fn blake2_mac_update;
34 static OSSL_FUNC_mac_final_fn blake2_mac_final;
36 struct blake2_mac_data_st {
39 unsigned char key[BLAKE2_KEYBYTES];
42 static void *blake2_mac_new(void *unused_provctx)
44 struct blake2_mac_data_st *macctx;
46 if (!ossl_prov_is_running())
49 macctx = OPENSSL_zalloc(sizeof(*macctx));
51 BLAKE2_PARAM_INIT(&macctx->params);
52 /* ctx initialization is deferred to BLAKE2b_Init() */
57 static void *blake2_mac_dup(void *vsrc)
59 struct blake2_mac_data_st *dst;
60 struct blake2_mac_data_st *src = vsrc;
62 if (!ossl_prov_is_running())
65 dst = OPENSSL_zalloc(sizeof(*dst));
73 static void blake2_mac_free(void *vmacctx)
75 struct blake2_mac_data_st *macctx = vmacctx;
78 OPENSSL_cleanse(macctx->key, sizeof(macctx->key));
83 static size_t blake2_mac_size(void *vmacctx)
85 struct blake2_mac_data_st *macctx = vmacctx;
87 return macctx->params.digest_length;
90 static int blake2_setkey(struct blake2_mac_data_st *macctx,
91 const unsigned char *key, size_t keylen)
93 if (keylen > BLAKE2_KEYBYTES || keylen == 0) {
94 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY_LENGTH);
97 memcpy(macctx->key, key, keylen);
98 /* Pad with zeroes at the end if required */
99 if (keylen < BLAKE2_KEYBYTES)
100 memset(macctx->key + keylen, 0, BLAKE2_KEYBYTES - keylen);
101 BLAKE2_PARAM_SET_KEY_LENGTH(&macctx->params, (uint8_t)keylen);
105 static int blake2_mac_init(void *vmacctx, const unsigned char *key,
106 size_t keylen, const OSSL_PARAM params[])
108 struct blake2_mac_data_st *macctx = vmacctx;
110 if (!ossl_prov_is_running() || !blake2_mac_set_ctx_params(macctx, params))
113 if (!blake2_setkey(macctx, key, keylen))
115 } else if (macctx->params.key_length == 0) {
116 /* Check key has been set */
117 ERR_raise(ERR_LIB_PROV, PROV_R_NO_KEY_SET);
120 return BLAKE2_INIT_KEY(&macctx->ctx, &macctx->params, macctx->key);
123 static int blake2_mac_update(void *vmacctx,
124 const unsigned char *data, size_t datalen)
126 struct blake2_mac_data_st *macctx = vmacctx;
131 return BLAKE2_UPDATE(&macctx->ctx, data, datalen);
134 static int blake2_mac_final(void *vmacctx,
135 unsigned char *out, size_t *outl,
138 struct blake2_mac_data_st *macctx = vmacctx;
140 if (!ossl_prov_is_running())
143 *outl = blake2_mac_size(macctx);
144 return BLAKE2_FINAL(out, &macctx->ctx);
147 static const OSSL_PARAM known_gettable_ctx_params[] = {
148 OSSL_PARAM_size_t(OSSL_MAC_PARAM_SIZE, NULL),
151 static const OSSL_PARAM *blake2_gettable_ctx_params(ossl_unused void *ctx,
152 ossl_unused void *provctx)
154 return known_gettable_ctx_params;
157 static int blake2_get_ctx_params(void *vmacctx, OSSL_PARAM params[])
161 if ((p = OSSL_PARAM_locate(params, OSSL_MAC_PARAM_SIZE)) != NULL)
162 return OSSL_PARAM_set_size_t(p, blake2_mac_size(vmacctx));
167 static const OSSL_PARAM known_settable_ctx_params[] = {
168 OSSL_PARAM_size_t(OSSL_MAC_PARAM_SIZE, NULL),
169 OSSL_PARAM_octet_string(OSSL_MAC_PARAM_KEY, NULL, 0),
170 OSSL_PARAM_octet_string(OSSL_MAC_PARAM_CUSTOM, NULL, 0),
171 OSSL_PARAM_octet_string(OSSL_MAC_PARAM_SALT, NULL, 0),
174 static const OSSL_PARAM *blake2_mac_settable_ctx_params(
175 ossl_unused void *ctx, ossl_unused void *p_ctx)
177 return known_settable_ctx_params;
181 * ALL parameters should be set before init().
183 static int blake2_mac_set_ctx_params(void *vmacctx, const OSSL_PARAM params[])
185 struct blake2_mac_data_st *macctx = vmacctx;
191 if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_SIZE)) != NULL) {
194 if (!OSSL_PARAM_get_size_t(p, &size)
196 || size > BLAKE2_OUTBYTES) {
197 ERR_raise(ERR_LIB_PROV, PROV_R_NOT_XOF_OR_INVALID_LENGTH);
200 BLAKE2_PARAM_SET_DIGEST_LENGTH(&macctx->params, (uint8_t)size);
203 if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_KEY)) != NULL
204 && !blake2_setkey(macctx, p->data, p->data_size))
207 if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_CUSTOM))
210 * The OSSL_PARAM API doesn't provide direct pointer use, so we
211 * must handle the OSSL_PARAM structure ourselves here
213 if (p->data_size > BLAKE2_PERSONALBYTES) {
214 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_CUSTOM_LENGTH);
217 BLAKE2_PARAM_SET_PERSONAL(&macctx->params, p->data, p->data_size);
220 if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_SALT)) != NULL) {
222 * The OSSL_PARAM API doesn't provide direct pointer use, so we
223 * must handle the OSSL_PARAM structure ourselves here as well
225 if (p->data_size > BLAKE2_SALTBYTES) {
226 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_SALT_LENGTH);
229 BLAKE2_PARAM_SET_SALT(&macctx->params, p->data, p->data_size);
234 const OSSL_DISPATCH BLAKE2_FUNCTIONS[] = {
235 { OSSL_FUNC_MAC_NEWCTX, (void (*)(void))blake2_mac_new },
236 { OSSL_FUNC_MAC_DUPCTX, (void (*)(void))blake2_mac_dup },
237 { OSSL_FUNC_MAC_FREECTX, (void (*)(void))blake2_mac_free },
238 { OSSL_FUNC_MAC_INIT, (void (*)(void))blake2_mac_init },
239 { OSSL_FUNC_MAC_UPDATE, (void (*)(void))blake2_mac_update },
240 { OSSL_FUNC_MAC_FINAL, (void (*)(void))blake2_mac_final },
241 { OSSL_FUNC_MAC_GETTABLE_CTX_PARAMS,
242 (void (*)(void))blake2_gettable_ctx_params },
243 { OSSL_FUNC_MAC_GET_CTX_PARAMS, (void (*)(void))blake2_get_ctx_params },
244 { OSSL_FUNC_MAC_SETTABLE_CTX_PARAMS,
245 (void (*)(void))blake2_mac_settable_ctx_params },
246 { OSSL_FUNC_MAC_SET_CTX_PARAMS, (void (*)(void))blake2_mac_set_ctx_params },