48e89338d4b4f8fddc9b1d490896402747d36245
[openssl.git] / providers / legacy / legacyprov.c
1 /*
2  * Copyright 2019 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 <string.h>
11 #include <stdio.h>
12 #include <openssl/core.h>
13 #include <openssl/core_numbers.h>
14 #include <openssl/core_names.h>
15 #include <openssl/params.h>
16
17 /* Functions provided by the core */
18 static OSSL_core_get_param_types_fn *c_get_param_types = NULL;
19 static OSSL_core_get_params_fn *c_get_params = NULL;
20
21 /* Parameters we provide to the core */
22 static const OSSL_ITEM legacy_param_types[] = {
23     { OSSL_PARAM_UTF8_PTR, OSSL_PROV_PARAM_NAME },
24     { OSSL_PARAM_UTF8_PTR, OSSL_PROV_PARAM_VERSION },
25     { OSSL_PARAM_UTF8_PTR, OSSL_PROV_PARAM_BUILDINFO },
26     { 0, NULL }
27 };
28
29 static const OSSL_ITEM *legacy_get_param_types(const OSSL_PROVIDER *prov)
30 {
31     return legacy_param_types;
32 }
33
34 static int legacy_get_params(const OSSL_PROVIDER *prov,
35                             const OSSL_PARAM params[])
36 {
37     const OSSL_PARAM *p;
38
39     p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_NAME);
40     if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, "OpenSSL Legacy Provider"))
41         return 0;
42     p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_VERSION);
43     if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, OPENSSL_VERSION_STR))
44         return 0;
45     p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_BUILDINFO);
46     if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, OPENSSL_FULL_VERSION_STR))
47         return 0;
48
49     return 1;
50 }
51
52 extern const OSSL_DISPATCH md2_functions[];
53
54 static const OSSL_ALGORITHM legacy_digests[] = {
55 #ifndef OPENSSL_NO_MD2
56     { "MD2", "legacy=yes", md2_functions },
57 #endif
58     { NULL, NULL, NULL }
59 };
60
61 static const OSSL_ALGORITHM *legacy_query(OSSL_PROVIDER *prov,
62                                           int operation_id,
63                                           int *no_cache)
64 {
65     *no_cache = 0;
66     switch (operation_id) {
67     case OSSL_OP_DIGEST:
68         return legacy_digests;
69     }
70     return NULL;
71 }
72
73 /* Functions we provide to the core */
74 static const OSSL_DISPATCH legacy_dispatch_table[] = {
75     { OSSL_FUNC_PROVIDER_GET_PARAM_TYPES, (void (*)(void))legacy_get_param_types },
76     { OSSL_FUNC_PROVIDER_GET_PARAMS, (void (*)(void))legacy_get_params },
77     { OSSL_FUNC_PROVIDER_QUERY_OPERATION, (void (*)(void))legacy_query },
78     { 0, NULL }
79 };
80
81 int OSSL_provider_init(const OSSL_PROVIDER *provider,
82                        const OSSL_DISPATCH *in,
83                        const OSSL_DISPATCH **out)
84 {
85     for (; in->function_id != 0; in++) {
86         switch (in->function_id) {
87         case OSSL_FUNC_CORE_GET_PARAM_TYPES:
88             c_get_param_types = OSSL_get_core_get_param_types(in);
89             break;
90         case OSSL_FUNC_CORE_GET_PARAMS:
91             c_get_params = OSSL_get_core_get_params(in);
92             break;
93         /* Just ignore anything we don't understand */
94         default:
95             break;
96         }
97     }
98
99     *out = legacy_dispatch_table;
100     return 1;
101 }