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Commit | Line | Data |
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b1322259 | 1 | /* |
fd38836b | 2 | * Copyright 2006-2018 The OpenSSL Project Authors. All Rights Reserved. |
de9fcfe3 | 3 | * |
3c120f91 | 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
b1322259 RS |
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 | |
de9fcfe3 DSH |
8 | */ |
9 | ||
677963e5 | 10 | #include "e_os.h" |
706457b7 | 11 | #include "eng_local.h" |
1e26a8ba | 12 | #include <openssl/evp.h> |
25f2138b | 13 | #include "crypto/asn1.h" |
de9fcfe3 | 14 | |
0f113f3e MC |
15 | /* |
16 | * If this symbol is defined then ENGINE_get_pkey_asn1_meth_engine(), the | |
01b8b3c7 DSH |
17 | * function that is used by EVP to hook in pkey_asn1_meth code and cache |
18 | * defaults (etc), will display brief debugging summaries to stderr with the | |
0f113f3e MC |
19 | * 'nid'. |
20 | */ | |
de9fcfe3 DSH |
21 | /* #define ENGINE_PKEY_ASN1_METH_DEBUG */ |
22 | ||
23 | static ENGINE_TABLE *pkey_asn1_meth_table = NULL; | |
24 | ||
25 | void ENGINE_unregister_pkey_asn1_meths(ENGINE *e) | |
0f113f3e MC |
26 | { |
27 | engine_table_unregister(&pkey_asn1_meth_table, e); | |
28 | } | |
de9fcfe3 DSH |
29 | |
30 | static void engine_unregister_all_pkey_asn1_meths(void) | |
0f113f3e MC |
31 | { |
32 | engine_table_cleanup(&pkey_asn1_meth_table); | |
33 | } | |
de9fcfe3 DSH |
34 | |
35 | int ENGINE_register_pkey_asn1_meths(ENGINE *e) | |
0f113f3e MC |
36 | { |
37 | if (e->pkey_asn1_meths) { | |
38 | const int *nids; | |
39 | int num_nids = e->pkey_asn1_meths(e, NULL, &nids, 0); | |
40 | if (num_nids > 0) | |
41 | return engine_table_register(&pkey_asn1_meth_table, | |
42 | engine_unregister_all_pkey_asn1_meths, | |
43 | e, nids, num_nids, 0); | |
44 | } | |
45 | return 1; | |
46 | } | |
de9fcfe3 | 47 | |
777c47ac | 48 | void ENGINE_register_all_pkey_asn1_meths(void) |
0f113f3e MC |
49 | { |
50 | ENGINE *e; | |
de9fcfe3 | 51 | |
0f113f3e MC |
52 | for (e = ENGINE_get_first(); e; e = ENGINE_get_next(e)) |
53 | ENGINE_register_pkey_asn1_meths(e); | |
54 | } | |
de9fcfe3 DSH |
55 | |
56 | int ENGINE_set_default_pkey_asn1_meths(ENGINE *e) | |
0f113f3e MC |
57 | { |
58 | if (e->pkey_asn1_meths) { | |
59 | const int *nids; | |
60 | int num_nids = e->pkey_asn1_meths(e, NULL, &nids, 0); | |
61 | if (num_nids > 0) | |
62 | return engine_table_register(&pkey_asn1_meth_table, | |
63 | engine_unregister_all_pkey_asn1_meths, | |
64 | e, nids, num_nids, 1); | |
65 | } | |
66 | return 1; | |
67 | } | |
68 | ||
69 | /* | |
70 | * Exposed API function to get a functional reference from the implementation | |
de9fcfe3 | 71 | * table (ie. try to get a functional reference from the tabled structural |
0f113f3e MC |
72 | * references) for a given pkey_asn1_meth 'nid' |
73 | */ | |
de9fcfe3 | 74 | ENGINE *ENGINE_get_pkey_asn1_meth_engine(int nid) |
0f113f3e MC |
75 | { |
76 | return engine_table_select(&pkey_asn1_meth_table, nid); | |
77 | } | |
de9fcfe3 | 78 | |
0f113f3e MC |
79 | /* |
80 | * Obtains a pkey_asn1_meth implementation from an ENGINE functional | |
81 | * reference | |
82 | */ | |
de9fcfe3 | 83 | const EVP_PKEY_ASN1_METHOD *ENGINE_get_pkey_asn1_meth(ENGINE *e, int nid) |
0f113f3e MC |
84 | { |
85 | EVP_PKEY_ASN1_METHOD *ret; | |
86 | ENGINE_PKEY_ASN1_METHS_PTR fn = ENGINE_get_pkey_asn1_meths(e); | |
87 | if (!fn || !fn(e, &ret, NULL, nid)) { | |
88 | ENGINEerr(ENGINE_F_ENGINE_GET_PKEY_ASN1_METH, | |
89 | ENGINE_R_UNIMPLEMENTED_PUBLIC_KEY_METHOD); | |
90 | return NULL; | |
91 | } | |
92 | return ret; | |
93 | } | |
de9fcfe3 DSH |
94 | |
95 | /* Gets the pkey_asn1_meth callback from an ENGINE structure */ | |
96 | ENGINE_PKEY_ASN1_METHS_PTR ENGINE_get_pkey_asn1_meths(const ENGINE *e) | |
0f113f3e MC |
97 | { |
98 | return e->pkey_asn1_meths; | |
99 | } | |
de9fcfe3 DSH |
100 | |
101 | /* Sets the pkey_asn1_meth callback in an ENGINE structure */ | |
102 | int ENGINE_set_pkey_asn1_meths(ENGINE *e, ENGINE_PKEY_ASN1_METHS_PTR f) | |
0f113f3e MC |
103 | { |
104 | e->pkey_asn1_meths = f; | |
105 | return 1; | |
106 | } | |
de9fcfe3 | 107 | |
0f113f3e MC |
108 | /* |
109 | * Internal function to free up EVP_PKEY_ASN1_METHOD structures before an | |
de9fcfe3 DSH |
110 | * ENGINE is destroyed |
111 | */ | |
112 | ||
113 | void engine_pkey_asn1_meths_free(ENGINE *e) | |
0f113f3e MC |
114 | { |
115 | int i; | |
116 | EVP_PKEY_ASN1_METHOD *pkm; | |
117 | if (e->pkey_asn1_meths) { | |
118 | const int *pknids; | |
119 | int npknids; | |
120 | npknids = e->pkey_asn1_meths(e, NULL, &pknids, 0); | |
121 | for (i = 0; i < npknids; i++) { | |
122 | if (e->pkey_asn1_meths(e, &pkm, NULL, pknids[i])) { | |
123 | EVP_PKEY_asn1_free(pkm); | |
124 | } | |
125 | } | |
126 | } | |
127 | } | |
128 | ||
129 | /* | |
130 | * Find a method based on a string. This does a linear search through all | |
131 | * implemented algorithms. This is OK in practice because only a small number | |
132 | * of algorithms are likely to be implemented in an engine and it is not used | |
133 | * for speed critical operations. | |
01b8b3c7 DSH |
134 | */ |
135 | ||
136 | const EVP_PKEY_ASN1_METHOD *ENGINE_get_pkey_asn1_meth_str(ENGINE *e, | |
0f113f3e MC |
137 | const char *str, |
138 | int len) | |
139 | { | |
140 | int i, nidcount; | |
141 | const int *nids; | |
142 | EVP_PKEY_ASN1_METHOD *ameth; | |
143 | if (!e->pkey_asn1_meths) | |
144 | return NULL; | |
145 | if (len == -1) | |
146 | len = strlen(str); | |
147 | nidcount = e->pkey_asn1_meths(e, NULL, &nids, 0); | |
148 | for (i = 0; i < nidcount; i++) { | |
149 | e->pkey_asn1_meths(e, &ameth, NULL, nids[i]); | |
86885c28 RS |
150 | if (((int)strlen(ameth->pem_str) == len) |
151 | && strncasecmp(ameth->pem_str, str, len) == 0) | |
0f113f3e MC |
152 | return ameth; |
153 | } | |
154 | return NULL; | |
155 | } | |
156 | ||
157 | typedef struct { | |
158 | ENGINE *e; | |
159 | const EVP_PKEY_ASN1_METHOD *ameth; | |
160 | const char *str; | |
161 | int len; | |
162 | } ENGINE_FIND_STR; | |
2f0550c4 DSH |
163 | |
164 | static void look_str_cb(int nid, STACK_OF(ENGINE) *sk, ENGINE *def, void *arg) | |
0f113f3e MC |
165 | { |
166 | ENGINE_FIND_STR *lk = arg; | |
167 | int i; | |
168 | if (lk->ameth) | |
169 | return; | |
170 | for (i = 0; i < sk_ENGINE_num(sk); i++) { | |
171 | ENGINE *e = sk_ENGINE_value(sk, i); | |
172 | EVP_PKEY_ASN1_METHOD *ameth; | |
173 | e->pkey_asn1_meths(e, &ameth, NULL, nid); | |
5eb77432 RL |
174 | if (ameth != NULL |
175 | && ((int)strlen(ameth->pem_str) == lk->len) | |
86885c28 | 176 | && strncasecmp(ameth->pem_str, lk->str, lk->len) == 0) { |
0f113f3e MC |
177 | lk->e = e; |
178 | lk->ameth = ameth; | |
179 | return; | |
180 | } | |
181 | } | |
182 | } | |
2f0550c4 DSH |
183 | |
184 | const EVP_PKEY_ASN1_METHOD *ENGINE_pkey_asn1_find_str(ENGINE **pe, | |
0f113f3e MC |
185 | const char *str, |
186 | int len) | |
187 | { | |
188 | ENGINE_FIND_STR fstr; | |
189 | fstr.e = NULL; | |
190 | fstr.ameth = NULL; | |
191 | fstr.str = str; | |
192 | fstr.len = len; | |
40e068d5 | 193 | |
c2e4e5d2 RL |
194 | if (!RUN_ONCE(&engine_lock_init, do_engine_lock_init)) { |
195 | ENGINEerr(ENGINE_F_ENGINE_PKEY_ASN1_FIND_STR, ERR_R_MALLOC_FAILURE); | |
196 | return NULL; | |
197 | } | |
198 | ||
40e068d5 | 199 | CRYPTO_THREAD_write_lock(global_engine_lock); |
0f113f3e MC |
200 | engine_table_doall(pkey_asn1_meth_table, look_str_cb, &fstr); |
201 | /* If found obtain a structural reference to engine */ | |
202 | if (fstr.e) { | |
203 | fstr.e->struct_ref++; | |
43d6702d | 204 | engine_ref_debug(fstr.e, 0, 1); |
0f113f3e MC |
205 | } |
206 | *pe = fstr.e; | |
40e068d5 | 207 | CRYPTO_THREAD_unlock(global_engine_lock); |
0f113f3e MC |
208 | return fstr.ameth; |
209 | } |