2 * Copyright 2019 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/bn.h>
13 #include <openssl/params.h>
14 #include "internal/param_build.h"
15 #include "prov/implementations.h"
16 #include "prov/providercommon.h"
17 #include "prov/provider_ctx.h"
18 #include "crypto/dsa.h"
20 static OSSL_OP_keymgmt_importdomparams_fn dsa_importdomparams
;
21 static OSSL_OP_keymgmt_exportdomparams_fn dsa_exportdomparams
;
22 static OSSL_OP_keymgmt_importkey_fn dsa_importkey
;
23 static OSSL_OP_keymgmt_exportkey_fn dsa_exportkey
;
25 static int params_to_domparams(DSA
*dsa
, const OSSL_PARAM params
[])
27 const OSSL_PARAM
*param_p
, *param_q
, *param_g
;
28 BIGNUM
*p
= NULL
, *q
= NULL
, *g
= NULL
;
33 param_p
= OSSL_PARAM_locate_const(params
, OSSL_PKEY_PARAM_FFC_P
);
34 param_q
= OSSL_PARAM_locate_const(params
, OSSL_PKEY_PARAM_FFC_Q
);
35 param_g
= OSSL_PARAM_locate_const(params
, OSSL_PKEY_PARAM_FFC_G
);
37 if ((param_p
!= NULL
&& !OSSL_PARAM_get_BN(param_p
, &p
))
38 || (param_q
!= NULL
&& !OSSL_PARAM_get_BN(param_q
, &q
))
39 || (param_g
!= NULL
&& !OSSL_PARAM_get_BN(param_g
, &g
)))
42 if (!DSA_set0_pqg(dsa
, p
, q
, g
))
54 static int domparams_to_params(DSA
*dsa
, OSSL_PARAM_BLD
*tmpl
)
56 const BIGNUM
*dsa_p
= NULL
, *dsa_q
= NULL
, *dsa_g
= NULL
;
61 DSA_get0_pqg(dsa
, &dsa_p
, &dsa_q
, &dsa_g
);
63 && !ossl_param_bld_push_BN(tmpl
, OSSL_PKEY_PARAM_FFC_P
, dsa_p
))
66 && !ossl_param_bld_push_BN(tmpl
, OSSL_PKEY_PARAM_FFC_Q
, dsa_q
))
69 && !ossl_param_bld_push_BN(tmpl
, OSSL_PKEY_PARAM_FFC_G
, dsa_g
))
75 static int params_to_key(DSA
*dsa
, const OSSL_PARAM params
[])
77 const OSSL_PARAM
*param_priv_key
, *param_pub_key
;
78 BIGNUM
*priv_key
= NULL
, *pub_key
= NULL
;
83 if (!params_to_domparams(dsa
, params
))
87 OSSL_PARAM_locate_const(params
, OSSL_PKEY_PARAM_DSA_PRIV_KEY
);
89 OSSL_PARAM_locate_const(params
, OSSL_PKEY_PARAM_DSA_PUB_KEY
);
92 * DSA documentation says that a public key must be present if a private key
95 if (param_priv_key
!= NULL
&& param_pub_key
== NULL
)
98 if ((param_priv_key
!= NULL
99 && !OSSL_PARAM_get_BN(param_priv_key
, &priv_key
))
100 || (param_pub_key
!= NULL
101 && !OSSL_PARAM_get_BN(param_pub_key
, &pub_key
)))
104 if (pub_key
!= NULL
&& !DSA_set0_key(dsa
, pub_key
, priv_key
))
115 static int key_to_params(DSA
*dsa
, OSSL_PARAM_BLD
*tmpl
)
117 const BIGNUM
*priv_key
= NULL
, *pub_key
= NULL
;
121 if (!domparams_to_params(dsa
, tmpl
))
124 DSA_get0_key(dsa
, &pub_key
, &priv_key
);
126 && !ossl_param_bld_push_BN(tmpl
, OSSL_PKEY_PARAM_DSA_PRIV_KEY
, priv_key
))
129 && !ossl_param_bld_push_BN(tmpl
, OSSL_PKEY_PARAM_DSA_PUB_KEY
, pub_key
))
135 static void *dsa_importdomparams(void *provctx
, const OSSL_PARAM params
[])
138 OPENSSL_CTX
*libctx
= PROV_LIBRARY_CONTEXT_OF(provctx
);
140 if ((dsa
= dsa_new(libctx
)) == NULL
141 || !params_to_domparams(dsa
, params
)) {
148 static int dsa_exportdomparams(void *domparams
,
149 OSSL_CALLBACK
*param_cb
, void *cbarg
)
151 DSA
*dsa
= domparams
;
153 OSSL_PARAM
*params
= NULL
;
156 ossl_param_bld_init(&tmpl
);
158 || !domparams_to_params(dsa
, &tmpl
)
159 || (params
= ossl_param_bld_to_param(&tmpl
)) == NULL
)
161 ret
= param_cb(params
, cbarg
);
162 ossl_param_bld_free(params
);
166 static void *dsa_importkey(void *provctx
, const OSSL_PARAM params
[])
169 OPENSSL_CTX
*libctx
= PROV_LIBRARY_CONTEXT_OF(provctx
);
171 if ((dsa
= dsa_new(libctx
)) == NULL
172 || !params_to_key(dsa
, params
)) {
179 static int dsa_exportkey(void *key
, OSSL_CALLBACK
*param_cb
, void *cbarg
)
183 OSSL_PARAM
*params
= NULL
;
186 ossl_param_bld_init(&tmpl
);
188 || !key_to_params(dsa
, &tmpl
)
189 || (params
= ossl_param_bld_to_param(&tmpl
)) == NULL
)
191 ret
= param_cb(params
, cbarg
);
192 ossl_param_bld_free(params
);
196 const OSSL_DISPATCH dsa_keymgmt_functions
[] = {
198 * TODO(3.0) When implementing OSSL_FUNC_KEYMGMT_GENKEY, remember to also
199 * implement OSSL_FUNC_KEYMGMT_EXPORTKEY.
201 { OSSL_FUNC_KEYMGMT_IMPORTDOMPARAMS
, (void (*)(void))dsa_importdomparams
},
202 { OSSL_FUNC_KEYMGMT_EXPORTDOMPARAMS
, (void (*)(void))dsa_exportdomparams
},
203 { OSSL_FUNC_KEYMGMT_FREEDOMPARAMS
, (void (*)(void))DSA_free
},
204 { OSSL_FUNC_KEYMGMT_IMPORTKEY
, (void (*)(void))dsa_importkey
},
205 { OSSL_FUNC_KEYMGMT_EXPORTKEY
, (void (*)(void))dsa_exportkey
},
206 { OSSL_FUNC_KEYMGMT_FREEKEY
, (void (*)(void))DSA_free
},