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0f113f3e | 1 | /* |
21dcbebc | 2 | * Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved. |
5270e702 | 3 | * |
21dcbebc RS |
4 | * Licensed under the OpenSSL license (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 | |
5270e702 | 8 | */ |
21dcbebc | 9 | |
e172d60d BM |
10 | /* ==================================================================== |
11 | * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. | |
0f113f3e | 12 | * ECDH support in OpenSSL originally developed by |
e172d60d BM |
13 | * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project. |
14 | */ | |
5270e702 RL |
15 | |
16 | #ifndef HEADER_ENGINE_H | |
0f113f3e MC |
17 | # define HEADER_ENGINE_H |
18 | ||
19 | # include <openssl/opensslconf.h> | |
20 | ||
3c27208f | 21 | # ifndef OPENSSL_NO_ENGINE |
98186eb4 | 22 | # if OPENSSL_API_COMPAT < 0x10100000L |
0f113f3e | 23 | # include <openssl/bn.h> |
3c27208f RS |
24 | # include <openssl/rsa.h> |
25 | # include <openssl/dsa.h> | |
26 | # include <openssl/dh.h> | |
27 | # include <openssl/ec.h> | |
0f113f3e MC |
28 | # include <openssl/rand.h> |
29 | # include <openssl/ui.h> | |
30 | # include <openssl/err.h> | |
31 | # endif | |
0f113f3e MC |
32 | # include <openssl/ossl_typ.h> |
33 | # include <openssl/symhacks.h> | |
0f113f3e | 34 | # include <openssl/x509.h> |
52df25cf | 35 | # include <openssl/engineerr.h> |
3c27208f | 36 | # ifdef __cplusplus |
5270e702 | 37 | extern "C" { |
3c27208f | 38 | # endif |
5270e702 | 39 | |
0f113f3e MC |
40 | /* |
41 | * These flags are used to control combinations of algorithm (methods) by | |
42 | * bitwise "OR"ing. | |
43 | */ | |
44 | # define ENGINE_METHOD_RSA (unsigned int)0x0001 | |
45 | # define ENGINE_METHOD_DSA (unsigned int)0x0002 | |
46 | # define ENGINE_METHOD_DH (unsigned int)0x0004 | |
47 | # define ENGINE_METHOD_RAND (unsigned int)0x0008 | |
0f113f3e MC |
48 | # define ENGINE_METHOD_CIPHERS (unsigned int)0x0040 |
49 | # define ENGINE_METHOD_DIGESTS (unsigned int)0x0080 | |
0f113f3e MC |
50 | # define ENGINE_METHOD_PKEY_METHS (unsigned int)0x0200 |
51 | # define ENGINE_METHOD_PKEY_ASN1_METHS (unsigned int)0x0400 | |
7d711cbc | 52 | # define ENGINE_METHOD_EC (unsigned int)0x0800 |
5270e702 | 53 | /* Obvious all-or-nothing cases. */ |
0f113f3e MC |
54 | # define ENGINE_METHOD_ALL (unsigned int)0xFFFF |
55 | # define ENGINE_METHOD_NONE (unsigned int)0x0000 | |
56 | ||
57 | /* | |
58 | * This(ese) flag(s) controls behaviour of the ENGINE_TABLE mechanism used | |
59 | * internally to control registration of ENGINE implementations, and can be | |
60 | * set by ENGINE_set_table_flags(). The "NOINIT" flag prevents attempts to | |
61 | * initialise registered ENGINEs if they are not already initialised. | |
62 | */ | |
63 | # define ENGINE_TABLE_FLAG_NOINIT (unsigned int)0x0001 | |
b6d1e52d | 64 | |
dcd87618 | 65 | /* ENGINE flags that can be set by ENGINE_set_flags(). */ |
76712e81 | 66 | /* Not used */ |
0f113f3e MC |
67 | /* #define ENGINE_FLAGS_MALLOCED 0x0001 */ |
68 | ||
69 | /* | |
70 | * This flag is for ENGINEs that wish to handle the various 'CMD'-related | |
71 | * control commands on their own. Without this flag, ENGINE_ctrl() handles | |
72 | * these control commands on behalf of the ENGINE using their "cmd_defns" | |
73 | * data. | |
74 | */ | |
75 | # define ENGINE_FLAGS_MANUAL_CMD_CTRL (int)0x0002 | |
76 | ||
77 | /* | |
78 | * This flag is for ENGINEs who return new duplicate structures when found | |
79 | * via "ENGINE_by_id()". When an ENGINE must store state (eg. if | |
80 | * ENGINE_ctrl() commands are called in sequence as part of some stateful | |
81 | * process like key-generation setup and execution), it can set this flag - | |
82 | * then each attempt to obtain the ENGINE will result in it being copied into | |
83 | * a new structure. Normally, ENGINEs don't declare this flag so | |
84 | * ENGINE_by_id() just increments the existing ENGINE's structural reference | |
85 | * count. | |
86 | */ | |
87 | # define ENGINE_FLAGS_BY_ID_COPY (int)0x0004 | |
88 | ||
89 | /* | |
90 | * This flag if for an ENGINE that does not want its methods registered as | |
91 | * part of ENGINE_register_all_complete() for example if the methods are not | |
92 | * usable as default methods. | |
93 | */ | |
94 | ||
95 | # define ENGINE_FLAGS_NO_REGISTER_ALL (int)0x0008 | |
96 | ||
97 | /* | |
98 | * ENGINEs can support their own command types, and these flags are used in | |
99 | * ENGINE_CTRL_GET_CMD_FLAGS to indicate to the caller what kind of input | |
100 | * each command expects. Currently only numeric and string input is | |
101 | * supported. If a control command supports none of the _NUMERIC, _STRING, or | |
102 | * _NO_INPUT options, then it is regarded as an "internal" control command - | |
103 | * and not for use in config setting situations. As such, they're not | |
104 | * available to the ENGINE_ctrl_cmd_string() function, only raw ENGINE_ctrl() | |
105 | * access. Changes to this list of 'command types' should be reflected | |
106 | * carefully in ENGINE_cmd_is_executable() and ENGINE_ctrl_cmd_string(). | |
107 | */ | |
40fcda29 GT |
108 | |
109 | /* accepts a 'long' input value (3rd parameter to ENGINE_ctrl) */ | |
0f113f3e MC |
110 | # define ENGINE_CMD_FLAG_NUMERIC (unsigned int)0x0001 |
111 | /* | |
112 | * accepts string input (cast from 'void*' to 'const char *', 4th parameter | |
113 | * to ENGINE_ctrl) | |
114 | */ | |
115 | # define ENGINE_CMD_FLAG_STRING (unsigned int)0x0002 | |
116 | /* | |
117 | * Indicates that the control command takes *no* input. Ie. the control | |
118 | * command is unparameterised. | |
119 | */ | |
120 | # define ENGINE_CMD_FLAG_NO_INPUT (unsigned int)0x0004 | |
121 | /* | |
122 | * Indicates that the control command is internal. This control command won't | |
839590f5 | 123 | * be shown in any output, and is only usable through the ENGINE_ctrl_cmd() |
0f113f3e MC |
124 | * function. |
125 | */ | |
126 | # define ENGINE_CMD_FLAG_INTERNAL (unsigned int)0x0008 | |
127 | ||
128 | /* | |
129 | * NB: These 3 control commands are deprecated and should not be used. | |
130 | * ENGINEs relying on these commands should compile conditional support for | |
131 | * compatibility (eg. if these symbols are defined) but should also migrate | |
132 | * the same functionality to their own ENGINE-specific control functions that | |
133 | * can be "discovered" by calling applications. The fact these control | |
134 | * commands wouldn't be "executable" (ie. usable by text-based config) | |
135 | * doesn't change the fact that application code can find and use them | |
136 | * without requiring per-ENGINE hacking. | |
137 | */ | |
138 | ||
139 | /* | |
140 | * These flags are used to tell the ctrl function what should be done. All | |
141 | * command numbers are shared between all engines, even if some don't make | |
142 | * sense to some engines. In such a case, they do nothing but return the | |
143 | * error ENGINE_R_CTRL_COMMAND_NOT_IMPLEMENTED. | |
144 | */ | |
145 | # define ENGINE_CTRL_SET_LOGSTREAM 1 | |
146 | # define ENGINE_CTRL_SET_PASSWORD_CALLBACK 2 | |
147 | # define ENGINE_CTRL_HUP 3/* Close and reinitialise | |
148 | * any handles/connections | |
149 | * etc. */ | |
150 | # define ENGINE_CTRL_SET_USER_INTERFACE 4/* Alternative to callback */ | |
151 | # define ENGINE_CTRL_SET_CALLBACK_DATA 5/* User-specific data, used | |
152 | * when calling the password | |
153 | * callback and the user | |
154 | * interface */ | |
155 | # define ENGINE_CTRL_LOAD_CONFIGURATION 6/* Load a configuration, | |
156 | * given a string that | |
157 | * represents a file name | |
158 | * or so */ | |
159 | # define ENGINE_CTRL_LOAD_SECTION 7/* Load data from a given | |
160 | * section in the already | |
161 | * loaded configuration */ | |
162 | ||
163 | /* | |
164 | * These control commands allow an application to deal with an arbitrary | |
165 | * engine in a dynamic way. Warn: Negative return values indicate errors FOR | |
166 | * THESE COMMANDS because zero is used to indicate 'end-of-list'. Other | |
167 | * commands, including ENGINE-specific command types, return zero for an | |
168 | * error. An ENGINE can choose to implement these ctrl functions, and can | |
169 | * internally manage things however it chooses - it does so by setting the | |
170 | * ENGINE_FLAGS_MANUAL_CMD_CTRL flag (using ENGINE_set_flags()). Otherwise | |
171 | * the ENGINE_ctrl() code handles this on the ENGINE's behalf using the | |
172 | * cmd_defns data (set using ENGINE_set_cmd_defns()). This means an ENGINE's | |
173 | * ctrl() handler need only implement its own commands - the above "meta" | |
174 | * commands will be taken care of. | |
175 | */ | |
176 | ||
177 | /* | |
178 | * Returns non-zero if the supplied ENGINE has a ctrl() handler. If "not", | |
179 | * then all the remaining control commands will return failure, so it is | |
180 | * worth checking this first if the caller is trying to "discover" the | |
181 | * engine's capabilities and doesn't want errors generated unnecessarily. | |
182 | */ | |
183 | # define ENGINE_CTRL_HAS_CTRL_FUNCTION 10 | |
184 | /* | |
185 | * Returns a positive command number for the first command supported by the | |
186 | * engine. Returns zero if no ctrl commands are supported. | |
187 | */ | |
188 | # define ENGINE_CTRL_GET_FIRST_CMD_TYPE 11 | |
189 | /* | |
190 | * The 'long' argument specifies a command implemented by the engine, and the | |
191 | * return value is the next command supported, or zero if there are no more. | |
192 | */ | |
193 | # define ENGINE_CTRL_GET_NEXT_CMD_TYPE 12 | |
194 | /* | |
195 | * The 'void*' argument is a command name (cast from 'const char *'), and the | |
196 | * return value is the command that corresponds to it. | |
197 | */ | |
198 | # define ENGINE_CTRL_GET_CMD_FROM_NAME 13 | |
199 | /* | |
200 | * The next two allow a command to be converted into its corresponding string | |
201 | * form. In each case, the 'long' argument supplies the command. In the | |
202 | * NAME_LEN case, the return value is the length of the command name (not | |
203 | * counting a trailing EOL). In the NAME case, the 'void*' argument must be a | |
204 | * string buffer large enough, and it will be populated with the name of the | |
205 | * command (WITH a trailing EOL). | |
206 | */ | |
207 | # define ENGINE_CTRL_GET_NAME_LEN_FROM_CMD 14 | |
208 | # define ENGINE_CTRL_GET_NAME_FROM_CMD 15 | |
40fcda29 | 209 | /* The next two are similar but give a "short description" of a command. */ |
0f113f3e MC |
210 | # define ENGINE_CTRL_GET_DESC_LEN_FROM_CMD 16 |
211 | # define ENGINE_CTRL_GET_DESC_FROM_CMD 17 | |
212 | /* | |
213 | * With this command, the return value is the OR'd combination of | |
40fcda29 | 214 | * ENGINE_CMD_FLAG_*** values that indicate what kind of input a given |
0f113f3e MC |
215 | * engine-specific ctrl command expects. |
216 | */ | |
217 | # define ENGINE_CTRL_GET_CMD_FLAGS 18 | |
40fcda29 | 218 | |
0f113f3e MC |
219 | /* |
220 | * ENGINE implementations should start the numbering of their own control | |
221 | * commands from this value. (ie. ENGINE_CMD_BASE, ENGINE_CMD_BASE + 1, etc). | |
222 | */ | |
223 | # define ENGINE_CMD_BASE 200 | |
40fcda29 | 224 | |
0f113f3e MC |
225 | /* |
226 | * NB: These 2 nCipher "chil" control commands are deprecated, and their | |
40fcda29 GT |
227 | * functionality is now available through ENGINE-specific control commands |
228 | * (exposed through the above-mentioned 'CMD'-handling). Code using these 2 | |
0f113f3e MC |
229 | * commands should be migrated to the more general command handling before |
230 | * these are removed. | |
231 | */ | |
40fcda29 | 232 | |
5270e702 | 233 | /* Flags specific to the nCipher "chil" engine */ |
0f113f3e MC |
234 | # define ENGINE_CTRL_CHIL_SET_FORKCHECK 100 |
235 | /* | |
236 | * Depending on the value of the (long)i argument, this sets or | |
237 | * unsets the SimpleForkCheck flag in the CHIL API to enable or | |
238 | * disable checking and workarounds for applications that fork(). | |
239 | */ | |
240 | # define ENGINE_CTRL_CHIL_NO_LOCKING 101 | |
241 | /* | |
242 | * This prevents the initialisation function from providing mutex | |
243 | * callbacks to the nCipher library. | |
244 | */ | |
245 | ||
246 | /* | |
247 | * If an ENGINE supports its own specific control commands and wishes the | |
248 | * framework to handle the above 'ENGINE_CMD_***'-manipulation commands on | |
249 | * its behalf, it should supply a null-terminated array of ENGINE_CMD_DEFN | |
250 | * entries to ENGINE_set_cmd_defns(). It should also implement a ctrl() | |
251 | * handler that supports the stated commands (ie. the "cmd_num" entries as | |
252 | * described by the array). NB: The array must be ordered in increasing order | |
253 | * of cmd_num. "null-terminated" means that the last ENGINE_CMD_DEFN element | |
254 | * has cmd_num set to zero and/or cmd_name set to NULL. | |
255 | */ | |
256 | typedef struct ENGINE_CMD_DEFN_st { | |
257 | unsigned int cmd_num; /* The command number */ | |
258 | const char *cmd_name; /* The command name itself */ | |
259 | const char *cmd_desc; /* A short description of the command */ | |
260 | unsigned int cmd_flags; /* The input the command expects */ | |
261 | } ENGINE_CMD_DEFN; | |
40fcda29 | 262 | |
d54bf145 | 263 | /* Generic function pointer */ |
0f113f3e | 264 | typedef int (*ENGINE_GEN_FUNC_PTR) (void); |
d54bf145 | 265 | /* Generic function pointer taking no arguments */ |
0f113f3e | 266 | typedef int (*ENGINE_GEN_INT_FUNC_PTR) (ENGINE *); |
d54bf145 | 267 | /* Specific control function pointer */ |
0f113f3e MC |
268 | typedef int (*ENGINE_CTRL_FUNC_PTR) (ENGINE *, int, long, void *, |
269 | void (*f) (void)); | |
d54bf145 | 270 | /* Generic load_key function pointer */ |
0f113f3e MC |
271 | typedef EVP_PKEY *(*ENGINE_LOAD_KEY_PTR)(ENGINE *, const char *, |
272 | UI_METHOD *ui_method, | |
273 | void *callback_data); | |
274 | typedef int (*ENGINE_SSL_CLIENT_CERT_PTR) (ENGINE *, SSL *ssl, | |
275 | STACK_OF(X509_NAME) *ca_dn, | |
276 | X509 **pcert, EVP_PKEY **pkey, | |
277 | STACK_OF(X509) **pother, | |
278 | UI_METHOD *ui_method, | |
279 | void *callback_data); | |
1d97c843 TH |
280 | /*- |
281 | * These callback types are for an ENGINE's handler for cipher and digest logic. | |
b370230b GT |
282 | * These handlers have these prototypes; |
283 | * int foo(ENGINE *e, const EVP_CIPHER **cipher, const int **nids, int nid); | |
284 | * int foo(ENGINE *e, const EVP_MD **digest, const int **nids, int nid); | |
285 | * Looking at how to implement these handlers in the case of cipher support, if | |
286 | * the framework wants the EVP_CIPHER for 'nid', it will call; | |
287 | * foo(e, &p_evp_cipher, NULL, nid); (return zero for failure) | |
288 | * If the framework wants a list of supported 'nid's, it will call; | |
289 | * foo(e, NULL, &p_nids, 0); (returns number of 'nids' or -1 for error) | |
290 | */ | |
0f113f3e MC |
291 | /* |
292 | * Returns to a pointer to the array of supported cipher 'nid's. If the | |
293 | * second parameter is non-NULL it is set to the size of the returned array. | |
294 | */ | |
295 | typedef int (*ENGINE_CIPHERS_PTR) (ENGINE *, const EVP_CIPHER **, | |
296 | const int **, int); | |
297 | typedef int (*ENGINE_DIGESTS_PTR) (ENGINE *, const EVP_MD **, const int **, | |
298 | int); | |
299 | typedef int (*ENGINE_PKEY_METHS_PTR) (ENGINE *, EVP_PKEY_METHOD **, | |
300 | const int **, int); | |
301 | typedef int (*ENGINE_PKEY_ASN1_METHS_PTR) (ENGINE *, EVP_PKEY_ASN1_METHOD **, | |
302 | const int **, int); | |
303 | /* | |
304 | * STRUCTURE functions ... all of these functions deal with pointers to | |
305 | * ENGINE structures where the pointers have a "structural reference". This | |
306 | * means that their reference is to allowed access to the structure but it | |
307 | * does not imply that the structure is functional. To simply increment or | |
308 | * decrement the structural reference count, use ENGINE_by_id and | |
309 | * ENGINE_free. NB: This is not required when iterating using ENGINE_get_next | |
310 | * as it will automatically decrement the structural reference count of the | |
311 | * "current" ENGINE and increment the structural reference count of the | |
312 | * ENGINE it returns (unless it is NULL). | |
313 | */ | |
5270e702 RL |
314 | |
315 | /* Get the first/last "ENGINE" type available. */ | |
316 | ENGINE *ENGINE_get_first(void); | |
317 | ENGINE *ENGINE_get_last(void); | |
318 | /* Iterate to the next/previous "ENGINE" type (NULL = end of the list). */ | |
319 | ENGINE *ENGINE_get_next(ENGINE *e); | |
320 | ENGINE *ENGINE_get_prev(ENGINE *e); | |
321 | /* Add another "ENGINE" type into the array. */ | |
322 | int ENGINE_add(ENGINE *e); | |
323 | /* Remove an existing "ENGINE" type from the array. */ | |
324 | int ENGINE_remove(ENGINE *e); | |
325 | /* Retrieve an engine from the list by its unique "id" value. */ | |
326 | ENGINE *ENGINE_by_id(const char *id); | |
f672aee4 RS |
327 | |
328 | #if OPENSSL_API_COMPAT < 0x10100000L | |
329 | # define ENGINE_load_openssl() \ | |
330 | OPENSSL_init_crypto(OPENSSL_INIT_ENGINE_OPENSSL, NULL) | |
331 | # define ENGINE_load_dynamic() \ | |
332 | OPENSSL_init_crypto(OPENSSL_INIT_ENGINE_DYNAMIC, NULL) | |
0f113f3e | 333 | # ifndef OPENSSL_NO_STATIC_ENGINE |
f672aee4 RS |
334 | # define ENGINE_load_padlock() \ |
335 | OPENSSL_init_crypto(OPENSSL_INIT_ENGINE_PADLOCK, NULL) | |
336 | # define ENGINE_load_capi() \ | |
337 | OPENSSL_init_crypto(OPENSSL_INIT_ENGINE_CAPI, NULL) | |
6cba4a66 | 338 | # define ENGINE_load_afalg() \ |
339 | OPENSSL_init_crypto(OPENSSL_INIT_ENGINE_AFALG, NULL) | |
0f113f3e | 340 | # endif |
f672aee4 RS |
341 | # define ENGINE_load_cryptodev() \ |
342 | OPENSSL_init_crypto(OPENSSL_INIT_ENGINE_CRYPTODEV, NULL) | |
343 | # define ENGINE_load_rdrand() \ | |
344 | OPENSSL_init_crypto(OPENSSL_INIT_ENGINE_RDRAND, NULL) | |
345 | #endif | |
11c0f120 | 346 | void ENGINE_load_builtin_engines(void); |
5270e702 | 347 | |
0f113f3e MC |
348 | /* |
349 | * Get and set global flags (ENGINE_TABLE_FLAG_***) for the implementation | |
350 | * "registry" handling. | |
351 | */ | |
b6d1e52d GT |
352 | unsigned int ENGINE_get_table_flags(void); |
353 | void ENGINE_set_table_flags(unsigned int flags); | |
354 | ||
1d97c843 | 355 | /*- Manage registration of ENGINEs per "table". For each type, there are 3 |
b6d1e52d GT |
356 | * functions; |
357 | * ENGINE_register_***(e) - registers the implementation from 'e' (if it has one) | |
358 | * ENGINE_unregister_***(e) - unregister the implementation from 'e' | |
359 | * ENGINE_register_all_***() - call ENGINE_register_***() for each 'e' in the list | |
6d4fb1d5 | 360 | * Cleanup is automatically registered from each table when required. |
1d97c843 | 361 | */ |
b6d1e52d GT |
362 | |
363 | int ENGINE_register_RSA(ENGINE *e); | |
364 | void ENGINE_unregister_RSA(ENGINE *e); | |
365 | void ENGINE_register_all_RSA(void); | |
366 | ||
367 | int ENGINE_register_DSA(ENGINE *e); | |
368 | void ENGINE_unregister_DSA(ENGINE *e); | |
369 | void ENGINE_register_all_DSA(void); | |
370 | ||
7d711cbc DSH |
371 | int ENGINE_register_EC(ENGINE *e); |
372 | void ENGINE_unregister_EC(ENGINE *e); | |
373 | void ENGINE_register_all_EC(void); | |
28572b57 | 374 | |
b6d1e52d GT |
375 | int ENGINE_register_DH(ENGINE *e); |
376 | void ENGINE_unregister_DH(ENGINE *e); | |
377 | void ENGINE_register_all_DH(void); | |
378 | ||
379 | int ENGINE_register_RAND(ENGINE *e); | |
380 | void ENGINE_unregister_RAND(ENGINE *e); | |
381 | void ENGINE_register_all_RAND(void); | |
382 | ||
b370230b GT |
383 | int ENGINE_register_ciphers(ENGINE *e); |
384 | void ENGINE_unregister_ciphers(ENGINE *e); | |
385 | void ENGINE_register_all_ciphers(void); | |
386 | ||
387 | int ENGINE_register_digests(ENGINE *e); | |
388 | void ENGINE_unregister_digests(ENGINE *e); | |
389 | void ENGINE_register_all_digests(void); | |
390 | ||
58aa573a DSH |
391 | int ENGINE_register_pkey_meths(ENGINE *e); |
392 | void ENGINE_unregister_pkey_meths(ENGINE *e); | |
393 | void ENGINE_register_all_pkey_meths(void); | |
394 | ||
777c47ac BL |
395 | int ENGINE_register_pkey_asn1_meths(ENGINE *e); |
396 | void ENGINE_unregister_pkey_asn1_meths(ENGINE *e); | |
397 | void ENGINE_register_all_pkey_asn1_meths(void); | |
398 | ||
0f113f3e MC |
399 | /* |
400 | * These functions register all support from the above categories. Note, use | |
401 | * of these functions can result in static linkage of code your application | |
402 | * may not need. If you only need a subset of functionality, consider using | |
403 | * more selective initialisation. | |
404 | */ | |
b6d1e52d GT |
405 | int ENGINE_register_complete(ENGINE *e); |
406 | int ENGINE_register_all_complete(void); | |
354c3ace | 407 | |
0f113f3e MC |
408 | /* |
409 | * Send parametrised control commands to the engine. The possibilities to | |
410 | * send down an integer, a pointer to data or a function pointer are | |
411 | * provided. Any of the parameters may or may not be NULL, depending on the | |
412 | * command number. In actuality, this function only requires a structural | |
413 | * (rather than functional) reference to an engine, but many control commands | |
414 | * may require the engine be functional. The caller should be aware of trying | |
415 | * commands that require an operational ENGINE, and only use functional | |
416 | * references in such situations. | |
417 | */ | |
418 | int ENGINE_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f) (void)); | |
419 | ||
420 | /* | |
421 | * This function tests if an ENGINE-specific command is usable as a | |
422 | * "setting". Eg. in an application's config file that gets processed through | |
40fcda29 | 423 | * ENGINE_ctrl_cmd_string(). If this returns zero, it is not available to |
0f113f3e MC |
424 | * ENGINE_ctrl_cmd_string(), only ENGINE_ctrl(). |
425 | */ | |
40fcda29 GT |
426 | int ENGINE_cmd_is_executable(ENGINE *e, int cmd); |
427 | ||
0f113f3e MC |
428 | /* |
429 | * This function works like ENGINE_ctrl() with the exception of taking a | |
430 | * command name instead of a command number, and can handle optional | |
431 | * commands. See the comment on ENGINE_ctrl_cmd_string() for an explanation | |
432 | * on how to use the cmd_name and cmd_optional. | |
433 | */ | |
839590f5 | 434 | int ENGINE_ctrl_cmd(ENGINE *e, const char *cmd_name, |
0f113f3e MC |
435 | long i, void *p, void (*f) (void), int cmd_optional); |
436 | ||
437 | /* | |
438 | * This function passes a command-name and argument to an ENGINE. The | |
439 | * cmd_name is converted to a command number and the control command is | |
440 | * called using 'arg' as an argument (unless the ENGINE doesn't support such | |
441 | * a command, in which case no control command is called). The command is | |
442 | * checked for input flags, and if necessary the argument will be converted | |
443 | * to a numeric value. If cmd_optional is non-zero, then if the ENGINE | |
444 | * doesn't support the given cmd_name the return value will be success | |
445 | * anyway. This function is intended for applications to use so that users | |
446 | * (or config files) can supply engine-specific config data to the ENGINE at | |
447 | * run-time to control behaviour of specific engines. As such, it shouldn't | |
448 | * be used for calling ENGINE_ctrl() functions that return data, deal with | |
449 | * binary data, or that are otherwise supposed to be used directly through | |
450 | * ENGINE_ctrl() in application code. Any "return" data from an ENGINE_ctrl() | |
451 | * operation in this function will be lost - the return value is interpreted | |
452 | * as failure if the return value is zero, success otherwise, and this | |
453 | * function returns a boolean value as a result. In other words, vendors of | |
454 | * 'ENGINE'-enabled devices should write ENGINE implementations with | |
455 | * parameterisations that work in this scheme, so that compliant ENGINE-based | |
456 | * applications can work consistently with the same configuration for the | |
457 | * same ENGINE-enabled devices, across applications. | |
458 | */ | |
40fcda29 | 459 | int ENGINE_ctrl_cmd_string(ENGINE *e, const char *cmd_name, const char *arg, |
0f113f3e MC |
460 | int cmd_optional); |
461 | ||
462 | /* | |
463 | * These functions are useful for manufacturing new ENGINE structures. They | |
464 | * don't address reference counting at all - one uses them to populate an | |
465 | * ENGINE structure with personalised implementations of things prior to | |
466 | * using it directly or adding it to the builtin ENGINE list in OpenSSL. | |
467 | * These are also here so that the ENGINE structure doesn't have to be | |
468 | * exposed and break binary compatibility! | |
469 | */ | |
5270e702 | 470 | ENGINE *ENGINE_new(void); |
5270e702 | 471 | int ENGINE_free(ENGINE *e); |
314c6670 | 472 | int ENGINE_up_ref(ENGINE *e); |
5270e702 RL |
473 | int ENGINE_set_id(ENGINE *e, const char *id); |
474 | int ENGINE_set_name(ENGINE *e, const char *name); | |
10e473e9 | 475 | int ENGINE_set_RSA(ENGINE *e, const RSA_METHOD *rsa_meth); |
a4aba800 | 476 | int ENGINE_set_DSA(ENGINE *e, const DSA_METHOD *dsa_meth); |
7d711cbc | 477 | int ENGINE_set_EC(ENGINE *e, const EC_KEY_METHOD *ecdsa_meth); |
f971ccb2 | 478 | int ENGINE_set_DH(ENGINE *e, const DH_METHOD *dh_meth); |
d54bf145 | 479 | int ENGINE_set_RAND(ENGINE *e, const RAND_METHOD *rand_meth); |
f524ddbe | 480 | int ENGINE_set_destroy_function(ENGINE *e, ENGINE_GEN_INT_FUNC_PTR destroy_f); |
5270e702 RL |
481 | int ENGINE_set_init_function(ENGINE *e, ENGINE_GEN_INT_FUNC_PTR init_f); |
482 | int ENGINE_set_finish_function(ENGINE *e, ENGINE_GEN_INT_FUNC_PTR finish_f); | |
483 | int ENGINE_set_ctrl_function(ENGINE *e, ENGINE_CTRL_FUNC_PTR ctrl_f); | |
0f113f3e MC |
484 | int ENGINE_set_load_privkey_function(ENGINE *e, |
485 | ENGINE_LOAD_KEY_PTR loadpriv_f); | |
d54bf145 | 486 | int ENGINE_set_load_pubkey_function(ENGINE *e, ENGINE_LOAD_KEY_PTR loadpub_f); |
05935c47 | 487 | int ENGINE_set_load_ssl_client_cert_function(ENGINE *e, |
0f113f3e MC |
488 | ENGINE_SSL_CLIENT_CERT_PTR |
489 | loadssl_f); | |
b370230b GT |
490 | int ENGINE_set_ciphers(ENGINE *e, ENGINE_CIPHERS_PTR f); |
491 | int ENGINE_set_digests(ENGINE *e, ENGINE_DIGESTS_PTR f); | |
6f88c6a6 | 492 | int ENGINE_set_pkey_meths(ENGINE *e, ENGINE_PKEY_METHS_PTR f); |
de9fcfe3 | 493 | int ENGINE_set_pkey_asn1_meths(ENGINE *e, ENGINE_PKEY_ASN1_METHS_PTR f); |
d54bf145 | 494 | int ENGINE_set_flags(ENGINE *e, int flags); |
40fcda29 | 495 | int ENGINE_set_cmd_defns(ENGINE *e, const ENGINE_CMD_DEFN *defns); |
1275c456 | 496 | /* These functions allow control over any per-structure ENGINE data. */ |
e6390aca RS |
497 | #define ENGINE_get_ex_new_index(l, p, newf, dupf, freef) \ |
498 | CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_ENGINE, l, p, newf, dupf, freef) | |
0ce5f3e4 | 499 | int ENGINE_set_ex_data(ENGINE *e, int idx, void *arg); |
1275c456 | 500 | void *ENGINE_get_ex_data(const ENGINE *e, int idx); |
b6d1e52d | 501 | |
6d4fb1d5 | 502 | #if OPENSSL_API_COMPAT < 0x10100000L |
0f113f3e | 503 | /* |
6d4fb1d5 MC |
504 | * This function previously cleaned up anything that needs it. Auto-deinit will |
505 | * now take care of it so it is no longer required to call this function. | |
0f113f3e | 506 | */ |
6457615a | 507 | # define ENGINE_cleanup() while(0) continue |
6d4fb1d5 | 508 | #endif |
5270e702 | 509 | |
0f113f3e MC |
510 | /* |
511 | * These return values from within the ENGINE structure. These can be useful | |
d54bf145 GT |
512 | * with functional references as well as structural references - it depends |
513 | * which you obtained. Using the result for functional purposes if you only | |
0f113f3e MC |
514 | * obtained a structural reference may be problematic! |
515 | */ | |
d54bf145 GT |
516 | const char *ENGINE_get_id(const ENGINE *e); |
517 | const char *ENGINE_get_name(const ENGINE *e); | |
518 | const RSA_METHOD *ENGINE_get_RSA(const ENGINE *e); | |
519 | const DSA_METHOD *ENGINE_get_DSA(const ENGINE *e); | |
7d711cbc | 520 | const EC_KEY_METHOD *ENGINE_get_EC(const ENGINE *e); |
d54bf145 GT |
521 | const DH_METHOD *ENGINE_get_DH(const ENGINE *e); |
522 | const RAND_METHOD *ENGINE_get_RAND(const ENGINE *e); | |
f524ddbe | 523 | ENGINE_GEN_INT_FUNC_PTR ENGINE_get_destroy_function(const ENGINE *e); |
d54bf145 GT |
524 | ENGINE_GEN_INT_FUNC_PTR ENGINE_get_init_function(const ENGINE *e); |
525 | ENGINE_GEN_INT_FUNC_PTR ENGINE_get_finish_function(const ENGINE *e); | |
526 | ENGINE_CTRL_FUNC_PTR ENGINE_get_ctrl_function(const ENGINE *e); | |
527 | ENGINE_LOAD_KEY_PTR ENGINE_get_load_privkey_function(const ENGINE *e); | |
528 | ENGINE_LOAD_KEY_PTR ENGINE_get_load_pubkey_function(const ENGINE *e); | |
0f113f3e MC |
529 | ENGINE_SSL_CLIENT_CERT_PTR ENGINE_get_ssl_client_cert_function(const ENGINE |
530 | *e); | |
b370230b GT |
531 | ENGINE_CIPHERS_PTR ENGINE_get_ciphers(const ENGINE *e); |
532 | ENGINE_DIGESTS_PTR ENGINE_get_digests(const ENGINE *e); | |
58aa573a | 533 | ENGINE_PKEY_METHS_PTR ENGINE_get_pkey_meths(const ENGINE *e); |
de9fcfe3 | 534 | ENGINE_PKEY_ASN1_METHS_PTR ENGINE_get_pkey_asn1_meths(const ENGINE *e); |
b370230b GT |
535 | const EVP_CIPHER *ENGINE_get_cipher(ENGINE *e, int nid); |
536 | const EVP_MD *ENGINE_get_digest(ENGINE *e, int nid); | |
58aa573a | 537 | const EVP_PKEY_METHOD *ENGINE_get_pkey_meth(ENGINE *e, int nid); |
de9fcfe3 | 538 | const EVP_PKEY_ASN1_METHOD *ENGINE_get_pkey_asn1_meth(ENGINE *e, int nid); |
01b8b3c7 | 539 | const EVP_PKEY_ASN1_METHOD *ENGINE_get_pkey_asn1_meth_str(ENGINE *e, |
0f113f3e MC |
540 | const char *str, |
541 | int len); | |
2f0550c4 | 542 | const EVP_PKEY_ASN1_METHOD *ENGINE_pkey_asn1_find_str(ENGINE **pe, |
0f113f3e MC |
543 | const char *str, |
544 | int len); | |
40fcda29 | 545 | const ENGINE_CMD_DEFN *ENGINE_get_cmd_defns(const ENGINE *e); |
d54bf145 | 546 | int ENGINE_get_flags(const ENGINE *e); |
5270e702 | 547 | |
0f113f3e MC |
548 | /* |
549 | * FUNCTIONAL functions. These functions deal with ENGINE structures that | |
550 | * have (or will) be initialised for use. Broadly speaking, the structural | |
551 | * functions are useful for iterating the list of available engine types, | |
552 | * creating new engine types, and other "list" operations. These functions | |
553 | * actually deal with ENGINEs that are to be used. As such these functions | |
554 | * can fail (if applicable) when particular engines are unavailable - eg. if | |
555 | * a hardware accelerator is not attached or not functioning correctly. Each | |
556 | * ENGINE has 2 reference counts; structural and functional. Every time a | |
557 | * functional reference is obtained or released, a corresponding structural | |
558 | * reference is automatically obtained or released too. | |
559 | */ | |
560 | ||
561 | /* | |
562 | * Initialise a engine type for use (or up its reference count if it's | |
563 | * already in use). This will fail if the engine is not currently operational | |
564 | * and cannot initialise. | |
565 | */ | |
5270e702 | 566 | int ENGINE_init(ENGINE *e); |
0f113f3e MC |
567 | /* |
568 | * Free a functional reference to a engine type. This does not require a | |
569 | * corresponding call to ENGINE_free as it also releases a structural | |
570 | * reference. | |
571 | */ | |
5270e702 | 572 | int ENGINE_finish(ENGINE *e); |
5270e702 | 573 | |
0f113f3e MC |
574 | /* |
575 | * The following functions handle keys that are stored in some secondary | |
5270e702 | 576 | * location, handled by the engine. The storage may be on a card or |
0f113f3e MC |
577 | * whatever. |
578 | */ | |
5270e702 | 579 | EVP_PKEY *ENGINE_load_private_key(ENGINE *e, const char *key_id, |
0f113f3e | 580 | UI_METHOD *ui_method, void *callback_data); |
5270e702 | 581 | EVP_PKEY *ENGINE_load_public_key(ENGINE *e, const char *key_id, |
0f113f3e | 582 | UI_METHOD *ui_method, void *callback_data); |
05935c47 | 583 | int ENGINE_load_ssl_client_cert(ENGINE *e, SSL *s, |
0f113f3e MC |
584 | STACK_OF(X509_NAME) *ca_dn, X509 **pcert, |
585 | EVP_PKEY **ppkey, STACK_OF(X509) **pother, | |
586 | UI_METHOD *ui_method, void *callback_data); | |
587 | ||
588 | /* | |
589 | * This returns a pointer for the current ENGINE structure that is (by | |
590 | * default) performing any RSA operations. The value returned is an | |
591 | * incremented reference, so it should be free'd (ENGINE_finish) before it is | |
592 | * discarded. | |
593 | */ | |
5270e702 RL |
594 | ENGINE *ENGINE_get_default_RSA(void); |
595 | /* Same for the other "methods" */ | |
596 | ENGINE *ENGINE_get_default_DSA(void); | |
7d711cbc | 597 | ENGINE *ENGINE_get_default_EC(void); |
5270e702 RL |
598 | ENGINE *ENGINE_get_default_DH(void); |
599 | ENGINE *ENGINE_get_default_RAND(void); | |
0f113f3e MC |
600 | /* |
601 | * These functions can be used to get a functional reference to perform | |
602 | * ciphering or digesting corresponding to "nid". | |
603 | */ | |
b370230b GT |
604 | ENGINE *ENGINE_get_cipher_engine(int nid); |
605 | ENGINE *ENGINE_get_digest_engine(int nid); | |
c9777d26 | 606 | ENGINE *ENGINE_get_pkey_meth_engine(int nid); |
01b8b3c7 | 607 | ENGINE *ENGINE_get_pkey_asn1_meth_engine(int nid); |
5270e702 | 608 | |
0f113f3e MC |
609 | /* |
610 | * This sets a new default ENGINE structure for performing RSA operations. If | |
611 | * the result is non-zero (success) then the ENGINE structure will have had | |
612 | * its reference count up'd so the caller should still free their own | |
613 | * reference 'e'. | |
614 | */ | |
5270e702 | 615 | int ENGINE_set_default_RSA(ENGINE *e); |
3822740c | 616 | int ENGINE_set_default_string(ENGINE *e, const char *def_list); |
5270e702 RL |
617 | /* Same for the other "methods" */ |
618 | int ENGINE_set_default_DSA(ENGINE *e); | |
7d711cbc | 619 | int ENGINE_set_default_EC(ENGINE *e); |
5270e702 RL |
620 | int ENGINE_set_default_DH(ENGINE *e); |
621 | int ENGINE_set_default_RAND(ENGINE *e); | |
b370230b GT |
622 | int ENGINE_set_default_ciphers(ENGINE *e); |
623 | int ENGINE_set_default_digests(ENGINE *e); | |
1892c8bf | 624 | int ENGINE_set_default_pkey_meths(ENGINE *e); |
01b8b3c7 | 625 | int ENGINE_set_default_pkey_asn1_meths(ENGINE *e); |
5270e702 | 626 | |
0f113f3e MC |
627 | /* |
628 | * The combination "set" - the flags are bitwise "OR"d from the | |
b6d1e52d GT |
629 | * ENGINE_METHOD_*** defines above. As with the "ENGINE_register_complete()" |
630 | * function, this function can result in unnecessary static linkage. If your | |
631 | * application requires only specific functionality, consider using more | |
0f113f3e MC |
632 | * selective functions. |
633 | */ | |
5270e702 RL |
634 | int ENGINE_set_default(ENGINE *e, unsigned int flags); |
635 | ||
c9501c22 DSH |
636 | void ENGINE_add_conf_module(void); |
637 | ||
b6d1e52d GT |
638 | /* Deprecated functions ... */ |
639 | /* int ENGINE_clear_defaults(void); */ | |
0e360199 | 640 | |
9391f977 GT |
641 | /**************************/ |
642 | /* DYNAMIC ENGINE SUPPORT */ | |
643 | /**************************/ | |
644 | ||
645 | /* Binary/behaviour compatibility levels */ | |
fa8edbbd | 646 | # define OSSL_DYNAMIC_VERSION (unsigned long)0x00030000 |
0f113f3e MC |
647 | /* |
648 | * Binary versions older than this are too old for us (whether we're a loader | |
649 | * or a loadee) | |
650 | */ | |
fa8edbbd | 651 | # define OSSL_DYNAMIC_OLDEST (unsigned long)0x00030000 |
0f113f3e MC |
652 | |
653 | /* | |
654 | * When compiling an ENGINE entirely as an external shared library, loadable | |
655 | * by the "dynamic" ENGINE, these types are needed. The 'dynamic_fns' | |
656 | * structure type provides the calling application's (or library's) error | |
657 | * functionality and memory management function pointers to the loaded | |
658 | * library. These should be used/set in the loaded library code so that the | |
659 | * loading application's 'state' will be used/changed in all operations. The | |
660 | * 'static_state' pointer allows the loaded library to know if it shares the | |
661 | * same static data as the calling application (or library), and thus whether | |
662 | * these callbacks need to be set or not. | |
663 | */ | |
6d566711 RL |
664 | typedef void *(*dyn_MEM_malloc_fn) (size_t, const char *, int); |
665 | typedef void *(*dyn_MEM_realloc_fn) (void *, size_t, const char *, int); | |
666 | typedef void (*dyn_MEM_free_fn) (void *, const char *, int); | |
667 | typedef struct st_dynamic_MEM_fns { | |
668 | dyn_MEM_malloc_fn malloc_fn; | |
669 | dyn_MEM_realloc_fn realloc_fn; | |
670 | dyn_MEM_free_fn free_fn; | |
671 | } dynamic_MEM_fns; | |
0f113f3e MC |
672 | /* |
673 | * FIXME: Perhaps the memory and locking code (crypto.h) should declare and | |
60250017 | 674 | * use these types so we (and any other dependent code) can simplify a bit?? |
0f113f3e | 675 | */ |
e5e6a94f | 676 | /* The top-level structure */ |
9391f977 | 677 | typedef struct st_dynamic_fns { |
0f113f3e | 678 | void *static_state; |
6d566711 | 679 | dynamic_MEM_fns mem_fns; |
0f113f3e MC |
680 | } dynamic_fns; |
681 | ||
682 | /* | |
683 | * The version checking function should be of this prototype. NB: The | |
684 | * ossl_version value passed in is the OSSL_DYNAMIC_VERSION of the loading | |
685 | * code. If this function returns zero, it indicates a (potential) version | |
9391f977 GT |
686 | * incompatibility and the loaded library doesn't believe it can proceed. |
687 | * Otherwise, the returned value is the (latest) version supported by the | |
0f113f3e MC |
688 | * loading library. The loader may still decide that the loaded code's |
689 | * version is unsatisfactory and could veto the load. The function is | |
690 | * expected to be implemented with the symbol name "v_check", and a default | |
691 | * implementation can be fully instantiated with | |
692 | * IMPLEMENT_DYNAMIC_CHECK_FN(). | |
693 | */ | |
694 | typedef unsigned long (*dynamic_v_check_fn) (unsigned long ossl_version); | |
695 | # define IMPLEMENT_DYNAMIC_CHECK_FN() \ | |
696 | OPENSSL_EXPORT unsigned long v_check(unsigned long v); \ | |
697 | OPENSSL_EXPORT unsigned long v_check(unsigned long v) { \ | |
e8aa8b6c | 698 | if (v >= OSSL_DYNAMIC_OLDEST) return OSSL_DYNAMIC_VERSION; \ |
0f113f3e MC |
699 | return 0; } |
700 | ||
701 | /* | |
702 | * This function is passed the ENGINE structure to initialise with its own | |
9391f977 | 703 | * function and command settings. It should not adjust the structural or |
0f113f3e MC |
704 | * functional reference counts. If this function returns zero, (a) the load |
705 | * will be aborted, (b) the previous ENGINE state will be memcpy'd back onto | |
706 | * the structure, and (c) the shared library will be unloaded. So | |
707 | * implementations should do their own internal cleanup in failure | |
708 | * circumstances otherwise they could leak. The 'id' parameter, if non-NULL, | |
709 | * represents the ENGINE id that the loader is looking for. If this is NULL, | |
710 | * the shared library can choose to return failure or to initialise a | |
711 | * 'default' ENGINE. If non-NULL, the shared library must initialise only an | |
712 | * ENGINE matching the passed 'id'. The function is expected to be | |
713 | * implemented with the symbol name "bind_engine". A standard implementation | |
714 | * can be instantiated with IMPLEMENT_DYNAMIC_BIND_FN(fn) where the parameter | |
715 | * 'fn' is a callback function that populates the ENGINE structure and | |
716 | * returns an int value (zero for failure). 'fn' should have prototype; | |
717 | * [static] int fn(ENGINE *e, const char *id); | |
718 | */ | |
719 | typedef int (*dynamic_bind_engine) (ENGINE *e, const char *id, | |
720 | const dynamic_fns *fns); | |
721 | # define IMPLEMENT_DYNAMIC_BIND_FN(fn) \ | |
722 | OPENSSL_EXPORT \ | |
723 | int bind_engine(ENGINE *e, const char *id, const dynamic_fns *fns); \ | |
724 | OPENSSL_EXPORT \ | |
725 | int bind_engine(ENGINE *e, const char *id, const dynamic_fns *fns) { \ | |
e8aa8b6c F |
726 | if (ENGINE_get_static_state() == fns->static_state) goto skip_cbs; \ |
727 | CRYPTO_set_mem_functions(fns->mem_fns.malloc_fn, \ | |
728 | fns->mem_fns.realloc_fn, \ | |
729 | fns->mem_fns.free_fn); \ | |
0f113f3e | 730 | skip_cbs: \ |
e8aa8b6c F |
731 | if (!fn(e, id)) return 0; \ |
732 | return 1; } | |
0f113f3e MC |
733 | |
734 | /* | |
735 | * If the loading application (or library) and the loaded ENGINE library | |
736 | * share the same static data (eg. they're both dynamically linked to the | |
737 | * same libcrypto.so) we need a way to avoid trying to set system callbacks - | |
738 | * this would fail, and for the same reason that it's unnecessary to try. If | |
739 | * the loaded ENGINE has (or gets from through the loader) its own copy of | |
740 | * the libcrypto static data, we will need to set the callbacks. The easiest | |
741 | * way to detect this is to have a function that returns a pointer to some | |
742 | * static data and let the loading application and loaded ENGINE compare | |
743 | * their respective values. | |
744 | */ | |
0587ec26 GT |
745 | void *ENGINE_get_static_state(void); |
746 | ||
2df7f11f | 747 | # if defined(__OpenBSD__) || defined(__FreeBSD__) || defined(__DragonFly__) || defined(HAVE_CRYPTODEV) |
5534c16a | 748 | DEPRECATEDIN_1_1_0(void ENGINE_setup_bsd_cryptodev(void)) |
0f113f3e | 749 | # endif |
0587ec26 | 750 | |
69588edb | 751 | int ERR_load_ENGINE_strings(void); |
957b6db3 | 752 | |
0cd0a820 | 753 | # ifdef __cplusplus |
5270e702 | 754 | } |
0cd0a820 | 755 | # endif |
3c27208f | 756 | # endif |
5270e702 | 757 | #endif |