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/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 {
40 POLY1305 poly1305; /* Poly1305 data */
43 static void *poly1305_new(void *provctx)
45 struct poly1305_data_st *ctx;
47 if (!ossl_prov_is_running())
49 ctx = OPENSSL_zalloc(sizeof(*ctx));
51 ctx->provctx = provctx;
55 static void poly1305_free(void *vmacctx)
57 OPENSSL_free(vmacctx);
60 static void *poly1305_dup(void *vsrc)
62 struct poly1305_data_st *src = vsrc;
63 struct poly1305_data_st *dst;
65 if (!ossl_prov_is_running())
67 dst = poly1305_new(src->provctx);
71 dst->poly1305 = src->poly1305;
75 static size_t poly1305_size(void)
77 return POLY1305_DIGEST_SIZE;
80 static int poly1305_init(void *vmacctx)
82 /* initialize the context in MAC_ctrl function */
83 return ossl_prov_is_running();
86 static int poly1305_update(void *vmacctx, const unsigned char *data,
89 struct poly1305_data_st *ctx = vmacctx;
94 /* poly1305 has nothing to return in its update function */
95 Poly1305_Update(&ctx->poly1305, data, datalen);
99 static int poly1305_final(void *vmacctx, unsigned char *out, size_t *outl,
102 struct poly1305_data_st *ctx = vmacctx;
104 if (!ossl_prov_is_running())
106 Poly1305_Final(&ctx->poly1305, out);
107 *outl = poly1305_size();
111 static const OSSL_PARAM known_gettable_params[] = {
112 OSSL_PARAM_size_t(OSSL_MAC_PARAM_SIZE, NULL),
115 static const OSSL_PARAM *poly1305_gettable_params(void *provctx)
117 return known_gettable_params;
120 static int poly1305_get_params(OSSL_PARAM params[])
124 if ((p = OSSL_PARAM_locate(params, OSSL_MAC_PARAM_SIZE)) != NULL)
125 return OSSL_PARAM_set_size_t(p, poly1305_size());
130 static const OSSL_PARAM known_settable_ctx_params[] = {
131 OSSL_PARAM_octet_string(OSSL_MAC_PARAM_KEY, NULL, 0),
134 static const OSSL_PARAM *poly1305_settable_ctx_params(ossl_unused void *provctx)
136 return known_settable_ctx_params;
139 static int poly1305_set_ctx_params(void *vmacctx, const OSSL_PARAM *params)
141 struct poly1305_data_st *ctx = vmacctx;
142 const OSSL_PARAM *p = NULL;
144 if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_KEY)) != NULL) {
145 if (p->data_type != OSSL_PARAM_OCTET_STRING
146 || p->data_size != POLY1305_KEY_SIZE) {
147 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY_LENGTH);
150 Poly1305_Init(&ctx->poly1305, p->data);
155 const OSSL_DISPATCH ossl_poly1305_functions[] = {
156 { OSSL_FUNC_MAC_NEWCTX, (void (*)(void))poly1305_new },
157 { OSSL_FUNC_MAC_DUPCTX, (void (*)(void))poly1305_dup },
158 { OSSL_FUNC_MAC_FREECTX, (void (*)(void))poly1305_free },
159 { OSSL_FUNC_MAC_INIT, (void (*)(void))poly1305_init },
160 { OSSL_FUNC_MAC_UPDATE, (void (*)(void))poly1305_update },
161 { OSSL_FUNC_MAC_FINAL, (void (*)(void))poly1305_final },
162 { OSSL_FUNC_MAC_GETTABLE_PARAMS, (void (*)(void))poly1305_gettable_params },
163 { OSSL_FUNC_MAC_GET_PARAMS, (void (*)(void))poly1305_get_params },
164 { OSSL_FUNC_MAC_SETTABLE_CTX_PARAMS,
165 (void (*)(void))poly1305_settable_ctx_params },
166 { OSSL_FUNC_MAC_SET_CTX_PARAMS, (void (*)(void))poly1305_set_ctx_params },