2 * Copyright 2018-2023 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/evp.h>
14 #include <openssl/err.h>
15 #include <openssl/proverr.h>
17 #include "crypto/poly1305.h"
19 #include "prov/implementations.h"
20 #include "prov/providercommon.h"
23 * Forward declaration of everything implemented here. This is not strictly
24 * necessary for the compiler, but provides an assurance that the signatures
25 * of the functions in the dispatch table are correct.
27 static OSSL_FUNC_mac_newctx_fn poly1305_new;
28 static OSSL_FUNC_mac_dupctx_fn poly1305_dup;
29 static OSSL_FUNC_mac_freectx_fn poly1305_free;
30 static OSSL_FUNC_mac_gettable_params_fn poly1305_gettable_params;
31 static OSSL_FUNC_mac_get_params_fn poly1305_get_params;
32 static OSSL_FUNC_mac_settable_ctx_params_fn poly1305_settable_ctx_params;
33 static OSSL_FUNC_mac_set_ctx_params_fn poly1305_set_ctx_params;
34 static OSSL_FUNC_mac_init_fn poly1305_init;
35 static OSSL_FUNC_mac_update_fn poly1305_update;
36 static OSSL_FUNC_mac_final_fn poly1305_final;
38 struct poly1305_data_st {
41 POLY1305 poly1305; /* Poly1305 data */
44 static void *poly1305_new(void *provctx)
46 struct poly1305_data_st *ctx;
48 if (!ossl_prov_is_running())
50 ctx = OPENSSL_zalloc(sizeof(*ctx));
52 ctx->provctx = provctx;
56 static void poly1305_free(void *vmacctx)
58 OPENSSL_free(vmacctx);
61 static void *poly1305_dup(void *vsrc)
63 struct poly1305_data_st *src = vsrc;
64 struct poly1305_data_st *dst;
66 if (!ossl_prov_is_running())
68 dst = OPENSSL_malloc(sizeof(*dst));
76 static size_t poly1305_size(void)
78 return POLY1305_DIGEST_SIZE;
81 static int poly1305_setkey(struct poly1305_data_st *ctx,
82 const unsigned char *key, size_t keylen)
84 if (keylen != POLY1305_KEY_SIZE) {
85 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY_LENGTH);
88 Poly1305_Init(&ctx->poly1305, key);
93 static int poly1305_init(void *vmacctx, const unsigned char *key,
94 size_t keylen, const OSSL_PARAM params[])
96 struct poly1305_data_st *ctx = vmacctx;
98 /* initialize the context in MAC_ctrl function */
99 if (!ossl_prov_is_running() || !poly1305_set_ctx_params(ctx, params))
102 return poly1305_setkey(ctx, key, keylen);
103 /* no reinitialization of context with the same key is allowed */
104 return ctx->updated == 0;
107 static int poly1305_update(void *vmacctx, const unsigned char *data,
110 struct poly1305_data_st *ctx = vmacctx;
116 /* poly1305 has nothing to return in its update function */
117 Poly1305_Update(&ctx->poly1305, data, datalen);
121 static int poly1305_final(void *vmacctx, unsigned char *out, size_t *outl,
124 struct poly1305_data_st *ctx = vmacctx;
126 if (!ossl_prov_is_running())
129 Poly1305_Final(&ctx->poly1305, out);
130 *outl = poly1305_size();
134 static const OSSL_PARAM known_gettable_params[] = {
135 OSSL_PARAM_size_t(OSSL_MAC_PARAM_SIZE, NULL),
138 static const OSSL_PARAM *poly1305_gettable_params(void *provctx)
140 return known_gettable_params;
143 static int poly1305_get_params(OSSL_PARAM params[])
147 if ((p = OSSL_PARAM_locate(params, OSSL_MAC_PARAM_SIZE)) != NULL)
148 return OSSL_PARAM_set_size_t(p, poly1305_size());
153 static const OSSL_PARAM known_settable_ctx_params[] = {
154 OSSL_PARAM_octet_string(OSSL_MAC_PARAM_KEY, NULL, 0),
157 static const OSSL_PARAM *poly1305_settable_ctx_params(ossl_unused void *ctx,
158 ossl_unused void *provctx)
160 return known_settable_ctx_params;
163 static int poly1305_set_ctx_params(void *vmacctx, const OSSL_PARAM *params)
165 struct poly1305_data_st *ctx = vmacctx;
168 if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_KEY)) != NULL
169 && !poly1305_setkey(ctx, p->data, p->data_size))
174 const OSSL_DISPATCH ossl_poly1305_functions[] = {
175 { OSSL_FUNC_MAC_NEWCTX, (void (*)(void))poly1305_new },
176 { OSSL_FUNC_MAC_DUPCTX, (void (*)(void))poly1305_dup },
177 { OSSL_FUNC_MAC_FREECTX, (void (*)(void))poly1305_free },
178 { OSSL_FUNC_MAC_INIT, (void (*)(void))poly1305_init },
179 { OSSL_FUNC_MAC_UPDATE, (void (*)(void))poly1305_update },
180 { OSSL_FUNC_MAC_FINAL, (void (*)(void))poly1305_final },
181 { OSSL_FUNC_MAC_GETTABLE_PARAMS, (void (*)(void))poly1305_gettable_params },
182 { OSSL_FUNC_MAC_GET_PARAMS, (void (*)(void))poly1305_get_params },
183 { OSSL_FUNC_MAC_SETTABLE_CTX_PARAMS,
184 (void (*)(void))poly1305_settable_ctx_params },
185 { OSSL_FUNC_MAC_SET_CTX_PARAMS, (void (*)(void))poly1305_set_ctx_params },