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>
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_FUNC_mac_newctx_fn poly1305_new
;
27 static OSSL_FUNC_mac_dupctx_fn poly1305_dup
;
28 static OSSL_FUNC_mac_freectx_fn poly1305_free
;
29 static OSSL_FUNC_mac_gettable_params_fn poly1305_gettable_params
;
30 static OSSL_FUNC_mac_get_params_fn poly1305_get_params
;
31 static OSSL_FUNC_mac_settable_ctx_params_fn poly1305_settable_ctx_params
;
32 static OSSL_FUNC_mac_set_ctx_params_fn poly1305_set_ctx_params
;
33 static OSSL_FUNC_mac_init_fn poly1305_init
;
34 static OSSL_FUNC_mac_update_fn poly1305_update
;
35 static OSSL_FUNC_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
);
97 *outl
= poly1305_size();
101 static const OSSL_PARAM known_gettable_params
[] = {
102 OSSL_PARAM_size_t(OSSL_MAC_PARAM_SIZE
, NULL
),
105 static const OSSL_PARAM
*poly1305_gettable_params(void *provctx
)
107 return known_gettable_params
;
110 static int poly1305_get_params(OSSL_PARAM params
[])
114 if ((p
= OSSL_PARAM_locate(params
, OSSL_MAC_PARAM_SIZE
)) != NULL
)
115 return OSSL_PARAM_set_size_t(p
, poly1305_size());
120 static const OSSL_PARAM known_settable_ctx_params
[] = {
121 OSSL_PARAM_octet_string(OSSL_MAC_PARAM_KEY
, NULL
, 0),
124 static const OSSL_PARAM
*poly1305_settable_ctx_params(void *provctx
)
126 return known_settable_ctx_params
;
129 static int poly1305_set_ctx_params(void *vmacctx
, const OSSL_PARAM
*params
)
131 struct poly1305_data_st
*ctx
= vmacctx
;
132 const OSSL_PARAM
*p
= NULL
;
134 if ((p
= OSSL_PARAM_locate_const(params
, OSSL_MAC_PARAM_KEY
)) != NULL
) {
135 if (p
->data_type
!= OSSL_PARAM_OCTET_STRING
136 || p
->data_size
!= POLY1305_KEY_SIZE
) {
137 ERR_raise(ERR_LIB_PROV
, PROV_R_INVALID_KEY_LENGTH
);
140 Poly1305_Init(&ctx
->poly1305
, p
->data
);
145 const OSSL_DISPATCH poly1305_functions
[] = {
146 { OSSL_FUNC_MAC_NEWCTX
, (void (*)(void))poly1305_new
},
147 { OSSL_FUNC_MAC_DUPCTX
, (void (*)(void))poly1305_dup
},
148 { OSSL_FUNC_MAC_FREECTX
, (void (*)(void))poly1305_free
},
149 { OSSL_FUNC_MAC_INIT
, (void (*)(void))poly1305_init
},
150 { OSSL_FUNC_MAC_UPDATE
, (void (*)(void))poly1305_update
},
151 { OSSL_FUNC_MAC_FINAL
, (void (*)(void))poly1305_final
},
152 { OSSL_FUNC_MAC_GETTABLE_PARAMS
, (void (*)(void))poly1305_gettable_params
},
153 { OSSL_FUNC_MAC_GET_PARAMS
, (void (*)(void))poly1305_get_params
},
154 { OSSL_FUNC_MAC_SETTABLE_CTX_PARAMS
,
155 (void (*)(void))poly1305_settable_ctx_params
},
156 { OSSL_FUNC_MAC_SET_CTX_PARAMS
, (void (*)(void))poly1305_set_ctx_params
},