2 * Copyright 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_names.h>
11 #include "internal/ffc.h"
12 #include "internal/sizes.h"
15 * The intention with the "backend" source file is to offer backend support
16 * for legacy backends (EVP_PKEY_ASN1_METHOD and EVP_PKEY_METHOD) and provider
17 * implementations alike.
20 int ffc_params_fromdata(FFC_PARAMS *ffc, const OSSL_PARAM params[])
22 const OSSL_PARAM *prm;
23 const OSSL_PARAM *param_p, *param_q, *param_g;
24 BIGNUM *p = NULL, *q = NULL, *g = NULL, *j = NULL;
30 prm = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_GROUP_NAME);
32 if (prm->data_type != OSSL_PARAM_UTF8_STRING)
36 * In a no-dh build we just go straight to err because we have no
39 if (!ffc_set_group_pqg(ffc, prm->data))
44 param_p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_P);
45 param_g = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_G);
46 param_q = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_Q);
48 if ((param_p != NULL && !OSSL_PARAM_get_BN(param_p, &p))
49 || (param_q != NULL && !OSSL_PARAM_get_BN(param_q, &q))
50 || (param_g != NULL && !OSSL_PARAM_get_BN(param_g, &g)))
53 prm = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_GINDEX);
55 if (!OSSL_PARAM_get_int(prm, &i))
59 prm = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_PCOUNTER);
61 if (!OSSL_PARAM_get_int(prm, &i))
65 prm = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_COFACTOR);
66 if (prm != NULL && !OSSL_PARAM_get_BN(prm, &j))
68 prm = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_H);
70 if (!OSSL_PARAM_get_int(prm, &i))
74 prm = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_SEED);
76 if (prm->data_type != OSSL_PARAM_OCTET_STRING)
78 if (!ffc_params_set_seed(ffc, prm->data, prm->data_size))
81 prm = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_VALIDATE_TYPE);
83 if (prm->data_type != OSSL_PARAM_UTF8_STRING)
85 ffc_params_set_flags(ffc, ffc_params_flags_from_name(prm->data));
87 prm = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_DIGEST);
90 const char *props = NULL;
92 if (prm->data_type != OSSL_PARAM_UTF8_STRING)
94 p1 = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_DIGEST_PROPS);
96 if (p1->data_type != OSSL_PARAM_UTF8_STRING)
99 if (!ffc_set_digest(ffc, prm->data, props))
103 ffc_params_set0_pqg(ffc, p, q, g);
104 ffc_params_set0_j(ffc, j);