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de9fcfe3 DSH |
1 | /* ==================================================================== |
2 | * Copyright (c) 2006 The OpenSSL Project. All rights reserved. | |
3 | * | |
4 | * Redistribution and use in source and binary forms, with or without | |
5 | * modification, are permitted provided that the following conditions | |
6 | * are met: | |
7 | * | |
8 | * 1. Redistributions of source code must retain the above copyright | |
0f113f3e | 9 | * notice, this list of conditions and the following disclaimer. |
de9fcfe3 DSH |
10 | * |
11 | * 2. Redistributions in binary form must reproduce the above copyright | |
12 | * notice, this list of conditions and the following disclaimer in | |
13 | * the documentation and/or other materials provided with the | |
14 | * distribution. | |
15 | * | |
16 | * 3. All advertising materials mentioning features or use of this | |
17 | * software must display the following acknowledgment: | |
18 | * "This product includes software developed by the OpenSSL Project | |
19 | * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" | |
20 | * | |
21 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
22 | * endorse or promote products derived from this software without | |
23 | * prior written permission. For written permission, please contact | |
24 | * licensing@OpenSSL.org. | |
25 | * | |
26 | * 5. Products derived from this software may not be called "OpenSSL" | |
27 | * nor may "OpenSSL" appear in their names without prior written | |
28 | * permission of the OpenSSL Project. | |
29 | * | |
30 | * 6. Redistributions of any form whatsoever must retain the following | |
31 | * acknowledgment: | |
32 | * "This product includes software developed by the OpenSSL Project | |
33 | * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" | |
34 | * | |
35 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
36 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
37 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
38 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
39 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
40 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
41 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
42 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
43 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
44 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
45 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
46 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
47 | * ==================================================================== | |
48 | * | |
49 | * This product includes cryptographic software written by Eric Young | |
50 | * (eay@cryptsoft.com). This product includes software written by Tim | |
51 | * Hudson (tjh@cryptsoft.com). | |
52 | * | |
53 | */ | |
54 | ||
55 | #include "eng_int.h" | |
1e26a8ba | 56 | #include <openssl/evp.h> |
5fe736e5 | 57 | #include "internal/asn1_int.h" |
de9fcfe3 | 58 | |
0f113f3e MC |
59 | /* |
60 | * If this symbol is defined then ENGINE_get_pkey_asn1_meth_engine(), the | |
01b8b3c7 DSH |
61 | * function that is used by EVP to hook in pkey_asn1_meth code and cache |
62 | * defaults (etc), will display brief debugging summaries to stderr with the | |
0f113f3e MC |
63 | * 'nid'. |
64 | */ | |
de9fcfe3 DSH |
65 | /* #define ENGINE_PKEY_ASN1_METH_DEBUG */ |
66 | ||
67 | static ENGINE_TABLE *pkey_asn1_meth_table = NULL; | |
68 | ||
69 | void ENGINE_unregister_pkey_asn1_meths(ENGINE *e) | |
0f113f3e MC |
70 | { |
71 | engine_table_unregister(&pkey_asn1_meth_table, e); | |
72 | } | |
de9fcfe3 DSH |
73 | |
74 | static void engine_unregister_all_pkey_asn1_meths(void) | |
0f113f3e MC |
75 | { |
76 | engine_table_cleanup(&pkey_asn1_meth_table); | |
77 | } | |
de9fcfe3 DSH |
78 | |
79 | int ENGINE_register_pkey_asn1_meths(ENGINE *e) | |
0f113f3e MC |
80 | { |
81 | if (e->pkey_asn1_meths) { | |
82 | const int *nids; | |
83 | int num_nids = e->pkey_asn1_meths(e, NULL, &nids, 0); | |
84 | if (num_nids > 0) | |
85 | return engine_table_register(&pkey_asn1_meth_table, | |
86 | engine_unregister_all_pkey_asn1_meths, | |
87 | e, nids, num_nids, 0); | |
88 | } | |
89 | return 1; | |
90 | } | |
de9fcfe3 | 91 | |
777c47ac | 92 | void ENGINE_register_all_pkey_asn1_meths(void) |
0f113f3e MC |
93 | { |
94 | ENGINE *e; | |
de9fcfe3 | 95 | |
0f113f3e MC |
96 | for (e = ENGINE_get_first(); e; e = ENGINE_get_next(e)) |
97 | ENGINE_register_pkey_asn1_meths(e); | |
98 | } | |
de9fcfe3 DSH |
99 | |
100 | int ENGINE_set_default_pkey_asn1_meths(ENGINE *e) | |
0f113f3e MC |
101 | { |
102 | if (e->pkey_asn1_meths) { | |
103 | const int *nids; | |
104 | int num_nids = e->pkey_asn1_meths(e, NULL, &nids, 0); | |
105 | if (num_nids > 0) | |
106 | return engine_table_register(&pkey_asn1_meth_table, | |
107 | engine_unregister_all_pkey_asn1_meths, | |
108 | e, nids, num_nids, 1); | |
109 | } | |
110 | return 1; | |
111 | } | |
112 | ||
113 | /* | |
114 | * Exposed API function to get a functional reference from the implementation | |
de9fcfe3 | 115 | * table (ie. try to get a functional reference from the tabled structural |
0f113f3e MC |
116 | * references) for a given pkey_asn1_meth 'nid' |
117 | */ | |
de9fcfe3 | 118 | ENGINE *ENGINE_get_pkey_asn1_meth_engine(int nid) |
0f113f3e MC |
119 | { |
120 | return engine_table_select(&pkey_asn1_meth_table, nid); | |
121 | } | |
de9fcfe3 | 122 | |
0f113f3e MC |
123 | /* |
124 | * Obtains a pkey_asn1_meth implementation from an ENGINE functional | |
125 | * reference | |
126 | */ | |
de9fcfe3 | 127 | const EVP_PKEY_ASN1_METHOD *ENGINE_get_pkey_asn1_meth(ENGINE *e, int nid) |
0f113f3e MC |
128 | { |
129 | EVP_PKEY_ASN1_METHOD *ret; | |
130 | ENGINE_PKEY_ASN1_METHS_PTR fn = ENGINE_get_pkey_asn1_meths(e); | |
131 | if (!fn || !fn(e, &ret, NULL, nid)) { | |
132 | ENGINEerr(ENGINE_F_ENGINE_GET_PKEY_ASN1_METH, | |
133 | ENGINE_R_UNIMPLEMENTED_PUBLIC_KEY_METHOD); | |
134 | return NULL; | |
135 | } | |
136 | return ret; | |
137 | } | |
de9fcfe3 DSH |
138 | |
139 | /* Gets the pkey_asn1_meth callback from an ENGINE structure */ | |
140 | ENGINE_PKEY_ASN1_METHS_PTR ENGINE_get_pkey_asn1_meths(const ENGINE *e) | |
0f113f3e MC |
141 | { |
142 | return e->pkey_asn1_meths; | |
143 | } | |
de9fcfe3 DSH |
144 | |
145 | /* Sets the pkey_asn1_meth callback in an ENGINE structure */ | |
146 | int ENGINE_set_pkey_asn1_meths(ENGINE *e, ENGINE_PKEY_ASN1_METHS_PTR f) | |
0f113f3e MC |
147 | { |
148 | e->pkey_asn1_meths = f; | |
149 | return 1; | |
150 | } | |
de9fcfe3 | 151 | |
0f113f3e MC |
152 | /* |
153 | * Internal function to free up EVP_PKEY_ASN1_METHOD structures before an | |
de9fcfe3 DSH |
154 | * ENGINE is destroyed |
155 | */ | |
156 | ||
157 | void engine_pkey_asn1_meths_free(ENGINE *e) | |
0f113f3e MC |
158 | { |
159 | int i; | |
160 | EVP_PKEY_ASN1_METHOD *pkm; | |
161 | if (e->pkey_asn1_meths) { | |
162 | const int *pknids; | |
163 | int npknids; | |
164 | npknids = e->pkey_asn1_meths(e, NULL, &pknids, 0); | |
165 | for (i = 0; i < npknids; i++) { | |
166 | if (e->pkey_asn1_meths(e, &pkm, NULL, pknids[i])) { | |
167 | EVP_PKEY_asn1_free(pkm); | |
168 | } | |
169 | } | |
170 | } | |
171 | } | |
172 | ||
173 | /* | |
174 | * Find a method based on a string. This does a linear search through all | |
175 | * implemented algorithms. This is OK in practice because only a small number | |
176 | * of algorithms are likely to be implemented in an engine and it is not used | |
177 | * for speed critical operations. | |
01b8b3c7 DSH |
178 | */ |
179 | ||
180 | const EVP_PKEY_ASN1_METHOD *ENGINE_get_pkey_asn1_meth_str(ENGINE *e, | |
0f113f3e MC |
181 | const char *str, |
182 | int len) | |
183 | { | |
184 | int i, nidcount; | |
185 | const int *nids; | |
186 | EVP_PKEY_ASN1_METHOD *ameth; | |
187 | if (!e->pkey_asn1_meths) | |
188 | return NULL; | |
189 | if (len == -1) | |
190 | len = strlen(str); | |
191 | nidcount = e->pkey_asn1_meths(e, NULL, &nids, 0); | |
192 | for (i = 0; i < nidcount; i++) { | |
193 | e->pkey_asn1_meths(e, &ameth, NULL, nids[i]); | |
86885c28 RS |
194 | if (((int)strlen(ameth->pem_str) == len) |
195 | && strncasecmp(ameth->pem_str, str, len) == 0) | |
0f113f3e MC |
196 | return ameth; |
197 | } | |
198 | return NULL; | |
199 | } | |
200 | ||
201 | typedef struct { | |
202 | ENGINE *e; | |
203 | const EVP_PKEY_ASN1_METHOD *ameth; | |
204 | const char *str; | |
205 | int len; | |
206 | } ENGINE_FIND_STR; | |
2f0550c4 DSH |
207 | |
208 | static void look_str_cb(int nid, STACK_OF(ENGINE) *sk, ENGINE *def, void *arg) | |
0f113f3e MC |
209 | { |
210 | ENGINE_FIND_STR *lk = arg; | |
211 | int i; | |
212 | if (lk->ameth) | |
213 | return; | |
214 | for (i = 0; i < sk_ENGINE_num(sk); i++) { | |
215 | ENGINE *e = sk_ENGINE_value(sk, i); | |
216 | EVP_PKEY_ASN1_METHOD *ameth; | |
217 | e->pkey_asn1_meths(e, &ameth, NULL, nid); | |
86885c28 RS |
218 | if (((int)strlen(ameth->pem_str) == lk->len) |
219 | && strncasecmp(ameth->pem_str, lk->str, lk->len) == 0) { | |
0f113f3e MC |
220 | lk->e = e; |
221 | lk->ameth = ameth; | |
222 | return; | |
223 | } | |
224 | } | |
225 | } | |
2f0550c4 DSH |
226 | |
227 | const EVP_PKEY_ASN1_METHOD *ENGINE_pkey_asn1_find_str(ENGINE **pe, | |
0f113f3e MC |
228 | const char *str, |
229 | int len) | |
230 | { | |
231 | ENGINE_FIND_STR fstr; | |
232 | fstr.e = NULL; | |
233 | fstr.ameth = NULL; | |
234 | fstr.str = str; | |
235 | fstr.len = len; | |
236 | CRYPTO_w_lock(CRYPTO_LOCK_ENGINE); | |
237 | engine_table_doall(pkey_asn1_meth_table, look_str_cb, &fstr); | |
238 | /* If found obtain a structural reference to engine */ | |
239 | if (fstr.e) { | |
240 | fstr.e->struct_ref++; | |
241 | engine_ref_debug(fstr.e, 0, 1) | |
242 | } | |
243 | *pe = fstr.e; | |
244 | CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE); | |
245 | return fstr.ameth; | |
246 | } |