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1 | /* |
2 | * Copyright (C) 2018 Tobias Brunner | |
3 | * HSR Hochschule fuer Technik Rapperswil | |
4 | * | |
5 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
6 | * of this software and associated documentation files (the "Software"), to deal | |
7 | * in the Software without restriction, including without limitation the rights | |
8 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
9 | * copies of the Software, and to permit persons to whom the Software is | |
10 | * furnished to do so, subject to the following conditions: | |
11 | * | |
12 | * The above copyright notice and this permission notice shall be included in | |
13 | * all copies or substantial portions of the Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
18 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
20 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
21 | * THE SOFTWARE. | |
22 | */ | |
23 | ||
24 | #include "botan_ed_public_key.h" | |
25 | #include "botan_util.h" | |
26 | ||
27 | #include <botan/build.h> | |
28 | ||
29 | #ifdef BOTAN_HAS_ED25519 | |
30 | ||
31 | #include <utils/debug.h> | |
32 | ||
33 | typedef struct private_public_key_t private_public_key_t; | |
34 | ||
35 | /** | |
36 | * Private data | |
37 | */ | |
38 | struct private_public_key_t { | |
39 | ||
40 | /** | |
41 | * Public interface | |
42 | */ | |
43 | public_key_t public; | |
44 | ||
45 | /** | |
46 | * Botan public key object | |
47 | */ | |
48 | botan_pubkey_t key; | |
49 | ||
50 | /** | |
51 | * Reference counter | |
52 | */ | |
53 | refcount_t ref; | |
54 | }; | |
55 | ||
56 | METHOD(public_key_t, get_type, key_type_t, | |
57 | private_public_key_t *this) | |
58 | { | |
59 | return KEY_ED25519; | |
60 | } | |
61 | ||
62 | METHOD(public_key_t, get_keysize, int, | |
63 | private_public_key_t *this) | |
64 | { | |
65 | return ED25519_KEY_LEN * 8; | |
66 | } | |
67 | ||
68 | METHOD(public_key_t, verify, bool, | |
69 | private_public_key_t *this, signature_scheme_t scheme, | |
70 | void *params, chunk_t data, chunk_t signature) | |
71 | { | |
72 | switch (scheme) | |
73 | { | |
74 | case SIGN_ED25519: | |
75 | return botan_verify_signature(this->key, "Pure", data, signature); | |
76 | default: | |
77 | DBG1(DBG_LIB, "signature scheme %N not supported via botan", | |
78 | signature_scheme_names, scheme); | |
79 | return FALSE; | |
80 | } | |
81 | } | |
82 | ||
83 | METHOD(public_key_t, encrypt, bool, | |
84 | private_public_key_t *this, encryption_scheme_t scheme, | |
4abb29f6 | 85 | void *params, chunk_t crypto, chunk_t *plain) |
4bcc4bac TB |
86 | { |
87 | DBG1(DBG_LIB, "EdDSA public key encryption not implemented"); | |
88 | return FALSE; | |
89 | } | |
90 | ||
91 | METHOD(public_key_t, get_fingerprint, bool, | |
92 | private_public_key_t *this, cred_encoding_type_t type, | |
93 | chunk_t *fingerprint) | |
94 | { | |
95 | return botan_get_fingerprint(this->key, this, type, fingerprint); | |
96 | } | |
97 | ||
98 | METHOD(public_key_t, get_encoding, bool, | |
99 | private_public_key_t *this, cred_encoding_type_t type, | |
100 | chunk_t *encoding) | |
101 | { | |
102 | return botan_get_encoding(this->key, type, encoding); | |
103 | } | |
104 | ||
105 | METHOD(public_key_t, get_ref, public_key_t*, | |
106 | private_public_key_t *this) | |
107 | { | |
108 | ref_get(&this->ref); | |
109 | return &this->public; | |
110 | } | |
111 | ||
112 | METHOD(public_key_t, destroy, void, | |
113 | private_public_key_t *this) | |
114 | { | |
115 | if (ref_put(&this->ref)) | |
116 | { | |
117 | lib->encoding->clear_cache(lib->encoding, this); | |
118 | botan_pubkey_destroy(this->key); | |
119 | free(this); | |
120 | } | |
121 | } | |
122 | ||
123 | /** | |
124 | * Internal generic constructor | |
125 | */ | |
126 | static private_public_key_t *create_empty() | |
127 | { | |
128 | private_public_key_t *this; | |
129 | ||
130 | INIT(this, | |
131 | .public = { | |
132 | .get_type = _get_type, | |
133 | .verify = _verify, | |
134 | .encrypt = _encrypt, | |
135 | .get_keysize = _get_keysize, | |
136 | .equals = public_key_equals, | |
137 | .get_fingerprint = _get_fingerprint, | |
138 | .has_fingerprint = public_key_has_fingerprint, | |
139 | .get_encoding = _get_encoding, | |
140 | .get_ref = _get_ref, | |
141 | .destroy = _destroy, | |
142 | }, | |
143 | .ref = 1, | |
144 | ); | |
145 | ||
146 | return this; | |
147 | } | |
148 | ||
149 | /* | |
150 | * Described in header | |
151 | */ | |
152 | public_key_t *botan_ed_public_key_adopt(botan_pubkey_t key) | |
153 | { | |
154 | private_public_key_t *this; | |
155 | ||
156 | this = create_empty(); | |
157 | this->key = key; | |
158 | ||
159 | return &this->public; | |
160 | } | |
161 | ||
162 | /* | |
163 | * Described in header | |
164 | */ | |
165 | public_key_t *botan_ed_public_key_load(key_type_t type, va_list args) | |
166 | { | |
167 | private_public_key_t *this; | |
168 | chunk_t key = chunk_empty; | |
169 | ||
170 | while (TRUE) | |
171 | { | |
172 | switch (va_arg(args, builder_part_t)) | |
173 | { | |
174 | case BUILD_EDDSA_PUB: | |
175 | key = va_arg(args, chunk_t); | |
176 | continue; | |
177 | case BUILD_END: | |
178 | break; | |
179 | default: | |
180 | return NULL; | |
181 | } | |
182 | break; | |
183 | } | |
184 | ||
185 | /* ASN.1-encoded keys are handled generically, so we only handle the | |
186 | * explicit case */ | |
187 | if (key.len != ED25519_KEY_LEN) | |
188 | { | |
189 | return NULL; | |
190 | } | |
191 | ||
192 | this = create_empty(); | |
193 | ||
194 | if (botan_pubkey_load_ed25519(&this->key, key.ptr)) | |
195 | { | |
196 | free(this); | |
197 | return NULL; | |
198 | } | |
199 | return &this->public; | |
200 | } | |
201 | ||
202 | #endif |