Fix intermittent sslapitest early data related failures
[openssl.git] / crypto / ffc / ffc_backend.c
1 /*
2  * Copyright 2020-2021 The OpenSSL Project Authors. All Rights Reserved.
3  *
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
8  */
9
10 #include <openssl/core_names.h>
11 #include "internal/ffc.h"
12 #include "internal/sizes.h"
13
14 /*
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.
18  */
19
20 int ossl_ffc_params_fromdata(FFC_PARAMS *ffc, const OSSL_PARAM params[])
21 {
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;
25     int i;
26
27     if (ffc == NULL)
28         return 0;
29
30     prm  = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_GROUP_NAME);
31     if (prm != NULL) {
32         /*
33          * In a no-dh build we just go straight to err because we have no
34          * support for this.
35          */
36 #ifndef OPENSSL_NO_DH
37         const DH_NAMED_GROUP *group = NULL;
38
39         if (prm->data_type != OSSL_PARAM_UTF8_STRING
40             || prm->data == NULL
41             || (group = ossl_ffc_name_to_dh_named_group(prm->data)) == NULL
42             || !ossl_ffc_named_group_set_pqg(ffc, group))
43 #endif
44             goto err;
45     }
46
47     param_p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_P);
48     param_g = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_G);
49     param_q = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_Q);
50
51     if ((param_p != NULL && !OSSL_PARAM_get_BN(param_p, &p))
52         || (param_q != NULL && !OSSL_PARAM_get_BN(param_q, &q))
53         || (param_g != NULL && !OSSL_PARAM_get_BN(param_g, &g)))
54         goto err;
55
56     prm = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_GINDEX);
57     if (prm != NULL) {
58         if (!OSSL_PARAM_get_int(prm, &i))
59             goto err;
60         ffc->gindex =  i;
61     }
62     prm = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_PCOUNTER);
63     if (prm != NULL) {
64         if (!OSSL_PARAM_get_int(prm, &i))
65             goto err;
66         ffc->pcounter = i;
67     }
68     prm = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_COFACTOR);
69     if (prm != NULL && !OSSL_PARAM_get_BN(prm, &j))
70         goto err;
71     prm = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_H);
72     if (prm != NULL) {
73         if (!OSSL_PARAM_get_int(prm, &i))
74             goto err;
75         ffc->h =  i;
76     }
77     prm  = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_SEED);
78     if (prm != NULL) {
79         if (prm->data_type != OSSL_PARAM_OCTET_STRING)
80             goto err;
81         if (!ossl_ffc_params_set_seed(ffc, prm->data, prm->data_size))
82             goto err;
83     }
84     prm  = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_VALIDATE_PQ);
85     if (prm != NULL) {
86         if (!OSSL_PARAM_get_int(prm, &i))
87             goto err;
88         ossl_ffc_params_enable_flags(ffc, FFC_PARAM_FLAG_VALIDATE_PQ, i);
89     }
90     prm  = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_VALIDATE_G);
91     if (prm != NULL) {
92         if (!OSSL_PARAM_get_int(prm, &i))
93             goto err;
94         ossl_ffc_params_enable_flags(ffc, FFC_PARAM_FLAG_VALIDATE_G, i);
95     }
96     prm  = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_VALIDATE_LEGACY);
97     if (prm != NULL) {
98         if (!OSSL_PARAM_get_int(prm, &i))
99             goto err;
100         ossl_ffc_params_enable_flags(ffc, FFC_PARAM_FLAG_VALIDATE_LEGACY, i);
101     }
102
103     prm = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_DIGEST);
104     if (prm != NULL) {
105         const OSSL_PARAM *p1;
106         const char *props = NULL;
107
108         if (prm->data_type != OSSL_PARAM_UTF8_STRING)
109             goto err;
110         p1 = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_DIGEST_PROPS);
111         if (p1 != NULL) {
112             if (p1->data_type != OSSL_PARAM_UTF8_STRING)
113                 goto err;
114         }
115         if (!ossl_ffc_set_digest(ffc, prm->data, props))
116             goto err;
117     }
118
119     ossl_ffc_params_set0_pqg(ffc, p, q, g);
120     ossl_ffc_params_set0_j(ffc, j);
121     return 1;
122
123  err:
124     BN_free(j);
125     BN_free(p);
126     BN_free(q);
127     BN_free(g);
128     return 0;
129 }