2 * Copyright 2018 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_numbers.h>
11 #include <openssl/core_names.h>
12 #include <openssl/params.h>
13 #include <openssl/evp.h>
14 #include <openssl/err.h>
16 #include "crypto/poly1305.h"
18 #include "prov/providercommonerr.h"
19 #include "prov/implementations.h"
22 * Forward declaration of everything implemented here. This is not strictly
23 * necessary for the compiler, but provides an assurance that the signatures
24 * of the functions in the dispatch table are correct.
26 static OSSL_OP_mac_newctx_fn poly1305_new;
27 static OSSL_OP_mac_dupctx_fn poly1305_dup;
28 static OSSL_OP_mac_freectx_fn poly1305_free;
29 static OSSL_OP_mac_gettable_params_fn poly1305_gettable_params;
30 static OSSL_OP_mac_get_params_fn poly1305_get_params;
31 static OSSL_OP_mac_settable_ctx_params_fn poly1305_settable_ctx_params;
32 static OSSL_OP_mac_set_ctx_params_fn poly1305_set_ctx_params;
33 static OSSL_OP_mac_init_fn poly1305_init;
34 static OSSL_OP_mac_update_fn poly1305_update;
35 static OSSL_OP_mac_final_fn poly1305_final;
37 struct poly1305_data_st {
39 POLY1305 poly1305; /* Poly1305 data */
42 static size_t poly1305_size(void);
44 static void *poly1305_new(void *provctx)
46 struct poly1305_data_st *ctx = OPENSSL_zalloc(sizeof(*ctx));
49 ctx->provctx = provctx;
53 static void poly1305_free(void *vmacctx)
55 OPENSSL_free(vmacctx);
58 static void *poly1305_dup(void *vsrc)
60 struct poly1305_data_st *src = vsrc;
61 struct poly1305_data_st *dst = poly1305_new(src->provctx);
66 dst->poly1305 = src->poly1305;
70 static size_t poly1305_size(void)
72 return POLY1305_DIGEST_SIZE;
75 static int poly1305_init(void *vmacctx)
77 /* initialize the context in MAC_ctrl function */
81 static int poly1305_update(void *vmacctx, const unsigned char *data,
84 struct poly1305_data_st *ctx = vmacctx;
86 /* poly1305 has nothing to return in its update function */
87 Poly1305_Update(&ctx->poly1305, data, datalen);
91 static int poly1305_final(void *vmacctx, unsigned char *out, size_t *outl,
94 struct poly1305_data_st *ctx = vmacctx;
96 Poly1305_Final(&ctx->poly1305, out);
100 static const OSSL_PARAM known_gettable_params[] = {
101 OSSL_PARAM_size_t(OSSL_MAC_PARAM_SIZE, NULL),
104 static const OSSL_PARAM *poly1305_gettable_params(void)
106 return known_gettable_params;
109 static int poly1305_get_params(OSSL_PARAM params[])
113 if ((p = OSSL_PARAM_locate(params, OSSL_MAC_PARAM_SIZE)) != NULL)
114 return OSSL_PARAM_set_size_t(p, poly1305_size());
119 static const OSSL_PARAM known_settable_ctx_params[] = {
120 OSSL_PARAM_octet_string(OSSL_MAC_PARAM_KEY, NULL, 0),
123 static const OSSL_PARAM *poly1305_settable_ctx_params(void)
125 return known_settable_ctx_params;
128 static int poly1305_set_ctx_params(void *vmacctx, const OSSL_PARAM *params)
130 struct poly1305_data_st *ctx = vmacctx;
131 const OSSL_PARAM *p = NULL;
133 if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_KEY)) != NULL) {
134 if (p->data_type != OSSL_PARAM_OCTET_STRING
135 || p->data_size != POLY1305_KEY_SIZE) {
136 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY_LENGTH);
139 Poly1305_Init(&ctx->poly1305, p->data);
144 const OSSL_DISPATCH poly1305_functions[] = {
145 { OSSL_FUNC_MAC_NEWCTX, (void (*)(void))poly1305_new },
146 { OSSL_FUNC_MAC_DUPCTX, (void (*)(void))poly1305_dup },
147 { OSSL_FUNC_MAC_FREECTX, (void (*)(void))poly1305_free },
148 { OSSL_FUNC_MAC_INIT, (void (*)(void))poly1305_init },
149 { OSSL_FUNC_MAC_UPDATE, (void (*)(void))poly1305_update },
150 { OSSL_FUNC_MAC_FINAL, (void (*)(void))poly1305_final },
151 { OSSL_FUNC_MAC_GETTABLE_PARAMS, (void (*)(void))poly1305_gettable_params },
152 { OSSL_FUNC_MAC_GET_PARAMS, (void (*)(void))poly1305_get_params },
153 { OSSL_FUNC_MAC_SETTABLE_CTX_PARAMS,
154 (void (*)(void))poly1305_settable_ctx_params },
155 { OSSL_FUNC_MAC_SET_CTX_PARAMS, (void (*)(void))poly1305_set_ctx_params },