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/engine.h>
14 #include <openssl/evp.h>
15 #include <openssl/cmac.h>
17 #include "internal/provider_algs.h"
18 #include "internal/provider_ctx.h"
19 #include "internal/provider_util.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 cmac_new
;
27 static OSSL_OP_mac_dupctx_fn cmac_dup
;
28 static OSSL_OP_mac_freectx_fn cmac_free
;
29 static OSSL_OP_mac_gettable_ctx_params_fn cmac_gettable_ctx_params
;
30 static OSSL_OP_mac_get_ctx_params_fn cmac_get_ctx_params
;
31 static OSSL_OP_mac_settable_ctx_params_fn cmac_settable_ctx_params
;
32 static OSSL_OP_mac_set_ctx_params_fn cmac_set_ctx_params
;
33 static OSSL_OP_mac_init_fn cmac_init
;
34 static OSSL_OP_mac_update_fn cmac_update
;
35 static OSSL_OP_mac_final_fn cmac_final
;
45 static void *cmac_new(void *provctx
)
47 struct cmac_data_st
*macctx
;
49 if ((macctx
= OPENSSL_zalloc(sizeof(*macctx
))) == NULL
50 || (macctx
->ctx
= CMAC_CTX_new()) == NULL
) {
54 macctx
->provctx
= provctx
;
60 static void cmac_free(void *vmacctx
)
62 struct cmac_data_st
*macctx
= vmacctx
;
65 CMAC_CTX_free(macctx
->ctx
);
66 ossl_prov_cipher_reset(&macctx
->cipher
);
71 static void *cmac_dup(void *vsrc
)
73 struct cmac_data_st
*src
= vsrc
;
74 struct cmac_data_st
*dst
= cmac_new(src
->provctx
);
76 if (!CMAC_CTX_copy(dst
->ctx
, src
->ctx
)
77 || !ossl_prov_cipher_copy(&dst
->cipher
, &src
->cipher
)) {
84 static size_t cmac_size(void *vmacctx
)
86 struct cmac_data_st
*macctx
= vmacctx
;
88 return EVP_CIPHER_CTX_block_size(CMAC_CTX_get0_cipher_ctx(macctx
->ctx
));
91 static int cmac_init(void *vmacctx
)
93 struct cmac_data_st
*macctx
= vmacctx
;
94 int rv
= CMAC_Init(macctx
->ctx
, NULL
, 0,
95 ossl_prov_cipher_cipher(&macctx
->cipher
),
96 ossl_prov_cipher_engine(&macctx
->cipher
));
98 ossl_prov_cipher_reset(&macctx
->cipher
);
102 static int cmac_update(void *vmacctx
, const unsigned char *data
,
105 struct cmac_data_st
*macctx
= vmacctx
;
107 return CMAC_Update(macctx
->ctx
, data
, datalen
);
110 static int cmac_final(void *vmacctx
, unsigned char *out
, size_t *outl
,
113 struct cmac_data_st
*macctx
= vmacctx
;
115 return CMAC_Final(macctx
->ctx
, out
, outl
);
118 static const OSSL_PARAM known_gettable_ctx_params
[] = {
119 OSSL_PARAM_size_t(OSSL_MAC_PARAM_SIZE
, NULL
),
122 static const OSSL_PARAM
*cmac_gettable_ctx_params(void)
124 return known_gettable_ctx_params
;
127 static int cmac_get_ctx_params(void *vmacctx
, OSSL_PARAM params
[])
131 if ((p
= OSSL_PARAM_locate(params
, OSSL_MAC_PARAM_SIZE
)) != NULL
)
132 return OSSL_PARAM_set_size_t(p
, cmac_size(vmacctx
));
137 static const OSSL_PARAM known_settable_ctx_params
[] = {
138 OSSL_PARAM_utf8_string(OSSL_MAC_PARAM_CIPHER
, NULL
, 0),
139 OSSL_PARAM_utf8_string(OSSL_MAC_PARAM_PROPERTIES
, NULL
, 0),
140 OSSL_PARAM_octet_string(OSSL_MAC_PARAM_KEY
, NULL
, 0),
143 static const OSSL_PARAM
*cmac_settable_ctx_params(void)
145 return known_settable_ctx_params
;
149 * ALL parameters should be set before init().
151 static int cmac_set_ctx_params(void *vmacctx
, const OSSL_PARAM params
[])
153 struct cmac_data_st
*macctx
= vmacctx
;
154 OPENSSL_CTX
*ctx
= PROV_LIBRARY_CONTEXT_OF(macctx
->provctx
);
157 if (!ossl_prov_cipher_load_from_params(&macctx
->cipher
, params
, ctx
))
160 if ((p
= OSSL_PARAM_locate_const(params
, OSSL_MAC_PARAM_KEY
)) != NULL
) {
161 if (p
->data_type
!= OSSL_PARAM_OCTET_STRING
)
164 if (!CMAC_Init(macctx
->ctx
, p
->data
, p
->data_size
,
165 ossl_prov_cipher_cipher(&macctx
->cipher
),
166 ossl_prov_cipher_engine(&macctx
->cipher
)))
169 ossl_prov_cipher_reset(&macctx
->cipher
);
174 const OSSL_DISPATCH cmac_functions
[] = {
175 { OSSL_FUNC_MAC_NEWCTX
, (void (*)(void))cmac_new
},
176 { OSSL_FUNC_MAC_DUPCTX
, (void (*)(void))cmac_dup
},
177 { OSSL_FUNC_MAC_FREECTX
, (void (*)(void))cmac_free
},
178 { OSSL_FUNC_MAC_INIT
, (void (*)(void))cmac_init
},
179 { OSSL_FUNC_MAC_UPDATE
, (void (*)(void))cmac_update
},
180 { OSSL_FUNC_MAC_FINAL
, (void (*)(void))cmac_final
},
181 { OSSL_FUNC_MAC_GETTABLE_CTX_PARAMS
,
182 (void (*)(void))cmac_gettable_ctx_params
},
183 { OSSL_FUNC_MAC_GET_CTX_PARAMS
, (void (*)(void))cmac_get_ctx_params
},
184 { OSSL_FUNC_MAC_SETTABLE_CTX_PARAMS
,
185 (void (*)(void))cmac_settable_ctx_params
},
186 { OSSL_FUNC_MAC_SET_CTX_PARAMS
, (void (*)(void))cmac_set_ctx_params
},