1 /* openssl/engine.h */
2 /* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL
3  * project 2000.
4  */
5 /* ====================================================================
6  * Copyright (c) 1999-2004 The OpenSSL Project.  All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  *
12  * 1. Redistributions of source code must retain the above copyright
13  *   notice, this list of conditions and the following disclaimer.
14  *
15  * 2. Redistributions in binary form must reproduce the above copyright
16  *   notice, this list of conditions and the following disclaimer in
17  *   the documentation and/or other materials provided with the
18  *   distribution.
19  *
20  * 3. All advertising materials mentioning features or use of this
21  *   software must display the following acknowledgment:
22  *   "This product includes software developed by the OpenSSL Project
23  *   for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24  *
25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26  *   endorse or promote products derived from this software without
27  *   prior written permission. For written permission, please contact
28  *   licensing@OpenSSL.org.
29  *
30  * 5. Products derived from this software may not be called "OpenSSL"
31  *   nor may "OpenSSL" appear in their names without prior written
32  *   permission of the OpenSSL Project.
33  *
34  * 6. Redistributions of any form whatsoever must retain the following
35  *   acknowledgment:
36  *   "This product includes software developed by the OpenSSL Project
37  *   for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38  *
39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50  * OF THE POSSIBILITY OF SUCH DAMAGE.
51  * ====================================================================
52  *
53  * This product includes cryptographic software written by Eric Young
54  * (eay@cryptsoft.com).  This product includes software written by Tim
55  * Hudson (tjh@cryptsoft.com).
56  *
57  */
58 /* ====================================================================
59  * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
60  * ECDH support in OpenSSL originally developed by
61  * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
62  */
63 
64 module deimos.openssl.engine;
65 
66 import deimos.openssl._d_util;
67 
68 public import deimos.openssl.opensslconf;
69 
70 version (OPENSSL_NO_ENGINE) {
71   static assert(false, "ENGINE is disabled.");
72 }
73 
74 version(OPENSSL_NO_DEPRECATED) {} else {
75 public import deimos.openssl.bn;
76 version(OPENSSL_NO_RSA) {} else {
77 public import deimos.openssl.rsa;
78 }
79 version(OPENSSL_NO_DSA) {} else {
80 public import deimos.openssl.dsa;
81 }
82 version(OPENSSL_NO_DH) {} else {
83 public import deimos.openssl.dh;
84 }
85 version(OPENSSL_NO_ECDH) {} else {
86 public import deimos.openssl.ecdh;
87 }
88 version(OPENSSL_NO_ECDSA) {} else {
89 public import deimos.openssl.ecdsa;
90 }
91 public import deimos.openssl.rand;
92 public import deimos.openssl.ui;
93 public import deimos.openssl.err;
94 }
95 
96 public import deimos.openssl.ossl_typ;
97 import deimos.openssl.ssl : SSL;
98 public import deimos.openssl.symhacks;
99 
100 public import deimos.openssl.x509;
101 
102 extern (C):
103 nothrow:
104 
105 /* These flags are used to control combinations of algorithm (methods)
106  * by bitwise "OR"ing. */
107 enum ENGINE_METHOD_RSA = 0x0001;
108 enum ENGINE_METHOD_DSA = 0x0002;
109 enum ENGINE_METHOD_DH = 0x0004;
110 enum ENGINE_METHOD_RAND = 0x0008;
111 enum ENGINE_METHOD_ECDH = 0x0010;
112 enum ENGINE_METHOD_ECDSA = 0x0020;
113 enum ENGINE_METHOD_CIPHERS = 0x0040;
114 enum ENGINE_METHOD_DIGESTS = 0x0080;
115 enum ENGINE_METHOD_STORE = 0x0100;
116 enum ENGINE_METHOD_PKEY_METHS = 0x0200;
117 enum ENGINE_METHOD_PKEY_ASN1_METHS = 0x0400;
118 /* Obvious all-or-nothing cases. */
119 enum ENGINE_METHOD_ALL = 0xFFFF;
120 enum ENGINE_METHOD_NONE = 0x0000;
121 
122 /* This(ese) flag(s) controls behaviour of the ENGINE_TABLE mechanism used
123  * internally to control registration of ENGINE implementations, and can be set
124  * by ENGINE_set_table_flags(). The "NOINIT" flag prevents attempts to
125  * initialise registered ENGINEs if they are not already initialised. */
126 enum ENGINE_TABLE_FLAG_NOINIT = 0x0001;
127 
128 /* ENGINE flags that can be set by ENGINE_set_flags(). */
129 /* enum ENGINE_FLAGS_MALLOCED = 0x0001; */ /* Not used */
130 
131 /* This flag is for ENGINEs that wish to handle the various 'CMD'-related
132  * control commands on their own. Without this flag, ENGINE_ctrl() handles these
133  * control commands on behalf of the ENGINE using their "cmd_defns" data. */
134 enum ENGINE_FLAGS_MANUAL_CMD_CTRL = 0x0002;
135 
136 /* This flag is for ENGINEs who return new duplicate structures when found via
137  * "ENGINE_by_id()". When an ENGINE must store state (eg. if ENGINE_ctrl()
138  * commands are called in sequence as part of some stateful process like
139  * key-generation setup and execution), it can set this flag - then each attempt
140  * to obtain the ENGINE will result in it being copied into a new structure.
141  * Normally, ENGINEs don't declare this flag so ENGINE_by_id() just increments
142  * the existing ENGINE's structural reference count. */
143 enum ENGINE_FLAGS_BY_ID_COPY = 0x0004;
144 
145 /* This flag if for an ENGINE that does not want its methods registered as
146  * part of ENGINE_register_all_complete() for example if the methods are
147  * not usable as default methods.
148  */
149 
150 enum ENGINE_FLAGS_NO_REGISTER_ALL = 0x0008;
151 
152 /* ENGINEs can support their own command types, and these flags are used in
153  * ENGINE_CTRL_GET_CMD_FLAGS to indicate to the caller what kind of input each
154  * command expects. Currently only numeric and string input is supported. If a
155  * control command supports none of the _NUMERIC, _STRING, or _NO_INPUT options,
156  * then it is regarded as an "internal" control command - and not for use in
157  * config setting situations. As such, they're not available to the
158  * ENGINE_ctrl_cmd_string() function, only raw ENGINE_ctrl() access. Changes to
159  * this list of 'command types' should be reflected carefully in
160  * ENGINE_cmd_is_executable() and ENGINE_ctrl_cmd_string(). */
161 
162 /* accepts a 'long' input value (3rd parameter to ENGINE_ctrl) */
163 enum ENGINE_CMD_FLAG_NUMERIC = 0x0001;
164 /* accepts string input (cast from 'void*' to 'const(char)* ', 4th parameter to
165  * ENGINE_ctrl) */
166 enum ENGINE_CMD_FLAG_STRING = 0x0002;
167 /* Indicates that the control command takes* no* input. Ie. the control command
168  * is unparameterised. */
169 enum ENGINE_CMD_FLAG_NO_INPUT = 0x0004;
170 /* Indicates that the control command is internal. This control command won't
171  * be shown in any output, and is only usable through the ENGINE_ctrl_cmd()
172  * function. */
173 enum ENGINE_CMD_FLAG_INTERNAL = 0x0008;
174 
175 /* NB: These 3 control commands are deprecated and should not be used. ENGINEs
176  * relying on these commands should compile conditional support for
177  * compatibility (eg. if these symbols are defined) but should also migrate the
178  * same functionality to their own ENGINE-specific control functions that can be
179  * "discovered" by calling applications. The fact these control commands
180  * wouldn't be "executable" (ie. usable by text-based config) doesn't change the
181  * fact that application code can find and use them without requiring per-ENGINE
182  * hacking. */
183 
184 /* These flags are used to tell the ctrl function what should be done.
185  * All command numbers are shared between all engines, even if some don't
186  * make sense to some engines.  In such a case, they do nothing but return
187  * the error ENGINE_R_CTRL_COMMAND_NOT_IMPLEMENTED. */
188 enum ENGINE_CTRL_SET_LOGSTREAM = 1;
189 enum ENGINE_CTRL_SET_PASSWORD_CALLBACK = 2;
190 enum ENGINE_CTRL_HUP = 3; /* Close and reinitialise any
191 						     handles/connections etc. */
192 enum ENGINE_CTRL_SET_USER_INTERFACE = 4; /* Alternative to callback */
193 enum ENGINE_CTRL_SET_CALLBACK_DATA = 5; /* User-specific data, used
194 						     when calling the password
195 						     callback and the user
196 						     interface */
197 enum ENGINE_CTRL_LOAD_CONFIGURATION = 6; /* Load a configuration, given
198 						     a string that represents a
199 						     file name or so */
200 enum ENGINE_CTRL_LOAD_SECTION = 7; /* Load data from a given
201 						     section in the already loaded
202 						     configuration */
203 
204 /* These control commands allow an application to deal with an arbitrary engine
205  * in a dynamic way. Warn: Negative return values indicate errors FOR THESE
206  * COMMANDS because zero is used to indicate 'end-of-list'. Other commands,
207  * including ENGINE-specific command types, return zero for an error.
208  *
209  * An ENGINE can choose to implement these ctrl functions, and can internally
210  * manage things however it chooses - it does so by setting the
211  * ENGINE_FLAGS_MANUAL_CMD_CTRL flag (using ENGINE_set_flags()). Otherwise the
212  * ENGINE_ctrl() code handles this on the ENGINE's behalf using the cmd_defns
213  * data (set using ENGINE_set_cmd_defns()). This means an ENGINE's ctrl()
214  * handler need only implement its own commands - the above "meta" commands will
215  * be taken care of. */
216 
217 /* Returns non-zero if the supplied ENGINE has a ctrl() handler. If "not", then
218  * all the remaining control commands will return failure, so it is worth
219  * checking this first if the caller is trying to "discover" the engine's
220  * capabilities and doesn't want errors generated unnecessarily. */
221 enum ENGINE_CTRL_HAS_CTRL_FUNCTION = 10;
222 /* Returns a positive command number for the first command supported by the
223  * engine. Returns zero if no ctrl commands are supported. */
224 enum ENGINE_CTRL_GET_FIRST_CMD_TYPE = 11;
225 /* The 'long' argument specifies a command implemented by the engine, and the
226  * return value is the next command supported, or zero if there are no more. */
227 enum ENGINE_CTRL_GET_NEXT_CMD_TYPE = 12;
228 /* The 'void*' argument is a command name (cast from 'const(char)* '), and the
229  * return value is the command that corresponds to it. */
230 enum ENGINE_CTRL_GET_CMD_FROM_NAME = 13;
231 /* The next two allow a command to be converted into its corresponding string
232  * form. In each case, the 'long' argument supplies the command. In the NAME_LEN
233  * case, the return value is the length of the command name (not counting a
234  * trailing EOL). In the NAME case, the 'void*' argument must be a string buffer
235  * large enough, and it will be populated with the name of the command (WITH a
236  * trailing EOL). */
237 enum ENGINE_CTRL_GET_NAME_LEN_FROM_CMD = 14;
238 enum ENGINE_CTRL_GET_NAME_FROM_CMD = 15;
239 /* The next two are similar but give a "short description" of a command. */
240 enum ENGINE_CTRL_GET_DESC_LEN_FROM_CMD = 16;
241 enum ENGINE_CTRL_GET_DESC_FROM_CMD = 17;
242 /* With this command, the return value is the OR'd combination of
243  * ENGINE_CMD_FLAG_*** values that indicate what kind of input a given
244  * engine-specific ctrl command expects. */
245 enum ENGINE_CTRL_GET_CMD_FLAGS = 18;
246 
247 /* ENGINE implementations should start the numbering of their own control
248  * commands from this value. (ie. ENGINE_CMD_BASE, ENGINE_CMD_BASE + 1, etc). */
249 enum ENGINE_CMD_BASE = 200;
250 
251 /* NB: These 2 nCipher "chil" control commands are deprecated, and their
252  * functionality is now available through ENGINE-specific control commands
253  * (exposed through the above-mentioned 'CMD'-handling). Code using these 2
254  * commands should be migrated to the more general command handling before these
255  * are removed. */
256 
257 /* Flags specific to the nCipher "chil" engine */
258 enum ENGINE_CTRL_CHIL_SET_FORKCHECK = 100;
259 	/* Depending on the value of the (c_long)i argument, this sets or
260 	 * unsets the SimpleForkCheck flag in the CHIL API to enable or
261 	 * disable checking and workarounds for applications that fork().
262 	 */
263 enum ENGINE_CTRL_CHIL_NO_LOCKING = 101;
264 	/* This prevents the initialisation function from providing mutex
265 	 * callbacks to the nCipher library. */
266 
267 /* If an ENGINE supports its own specific control commands and wishes the
268  * framework to handle the above 'ENGINE_CMD_***'-manipulation commands on its
269  * behalf, it should supply a null-terminated array of ENGINE_CMD_DEFN entries
270  * to ENGINE_set_cmd_defns(). It should also implement a ctrl() handler that
271  * supports the stated commands (ie. the "cmd_num" entries as described by the
272  * array). NB: The array must be ordered in increasing order of cmd_num.
273  * "null-terminated" means that the last ENGINE_CMD_DEFN element has cmd_num set
274  * to zero and/or cmd_name set to NULL. */
275 struct ENGINE_CMD_DEFN_st {
276 	uint cmd_num; /* The command number */
277 	const(char)* cmd_name; /* The command name itself */
278 	const(char)* cmd_desc; /* A short description of the command */
279 	uint cmd_flags; /* The input the command expects */
280 	}
281 alias ENGINE_CMD_DEFN_st ENGINE_CMD_DEFN;
282 
283 /* Generic function pointer */
284 alias ExternC!(int function()) ENGINE_GEN_FUNC_PTR;
285 /* Generic function pointer taking no arguments */
286 alias ExternC!(int function(ENGINE*)) ENGINE_GEN_INT_FUNC_PTR;
287 /* Specific control function pointer */
288 alias ExternC!(int function(ENGINE*, int, c_long, void*, ExternC!(void function()) f)) ENGINE_CTRL_FUNC_PTR;
289 /* Generic load_key function pointer */
290 alias ExternC!(EVP_PKEY*function(ENGINE*, const(char)*,
291 	UI_METHOD* ui_method, void* callback_data)) ENGINE_LOAD_KEY_PTR;
292 alias ExternC!(int function(ENGINE*, SSL* ssl,
293 	STACK_OF!(X509_NAME) *ca_dn, X509** pcert, EVP_PKEY** pkey,
294 	STACK_OF!(X509) **pother, UI_METHOD* ui_method, void* callback_data)) ENGINE_SSL_CLIENT_CERT_PTR;
295 /* These callback types are for an ENGINE's handler for cipher and digest logic.
296  * These handlers have these prototypes;
297  *  int foo(ENGINE* e, const(EVP_CIPHER)** cipher, const(int)** nids, int nid);
298  *  int foo(ENGINE* e, const(EVP_MD)** digest, const(int)** nids, int nid);
299  * Looking at how to implement these handlers in the case of cipher support, if
300  * the framework wants the EVP_CIPHER for 'nid', it will call;
301  *  foo(e, &p_evp_cipher, NULL, nid);    (return zero for failure)
302  * If the framework wants a list of supported 'nid's, it will call;
303  *  foo(e, NULL, &p_nids, 0); (returns number of 'nids' or -1 for error)
304  */
305 /* Returns to a pointer to the array of supported cipher 'nid's. If the second
306  * parameter is non-NULL it is set to the size of the returned array. */
307 alias ExternC!(int function(ENGINE*, const(EVP_CIPHER)**, const(int)**, int)) ENGINE_CIPHERS_PTR;
308 alias ExternC!(int function(ENGINE*, const(EVP_MD)**, const(int)**, int)) ENGINE_DIGESTS_PTR;
309 alias ExternC!(int function(ENGINE*, EVP_PKEY_METHOD**, const(int)**, int)) ENGINE_PKEY_METHS_PTR;
310 alias ExternC!(int function(ENGINE*, EVP_PKEY_ASN1_METHOD**, const(int)**, int)) ENGINE_PKEY_ASN1_METHS_PTR;
311 /* STRUCTURE functions ... all of these functions deal with pointers to ENGINE
312  * structures where the pointers have a "structural reference". This means that
313  * their reference is to allowed access to the structure but it does not imply
314  * that the structure is functional. To simply increment or decrement the
315  * structural reference count, use ENGINE_by_id and ENGINE_free. NB: This is not
316  * required when iterating using ENGINE_get_next as it will automatically
317  * decrement the structural reference count of the "current" ENGINE and
318  * increment the structural reference count of the ENGINE it returns (unless it
319  * is NULL). */
320 
321 /* Get the first/last "ENGINE" type available. */
322 ENGINE* ENGINE_get_first();
323 ENGINE* ENGINE_get_last();
324 /* Iterate to the next/previous "ENGINE" type (NULL = end of the list). */
325 ENGINE* ENGINE_get_next(ENGINE* e);
326 ENGINE* ENGINE_get_prev(ENGINE* e);
327 /* Add another "ENGINE" type into the array. */
328 int ENGINE_add(ENGINE* e);
329 /* Remove an existing "ENGINE" type from the array. */
330 int ENGINE_remove(ENGINE* e);
331 /* Retrieve an engine from the list by its unique "id" value. */
332 ENGINE* ENGINE_by_id(const(char)* id);
333 /* Add all the built-in engines. */
334 void ENGINE_load_openssl();
335 void ENGINE_load_dynamic();
336 version(OPENSSL_NO_STATIC_ENGINE) {} else {
337 void ENGINE_load_4758cca();
338 void ENGINE_load_aep();
339 void ENGINE_load_atalla();
340 void ENGINE_load_chil();
341 void ENGINE_load_cswift();
342 void ENGINE_load_nuron();
343 void ENGINE_load_sureware();
344 void ENGINE_load_ubsec();
345 void ENGINE_load_padlock();
346 void ENGINE_load_capi();
347 version(OPENSSL_NO_GMP) {} else {
348 void ENGINE_load_gmp();
349 }
350 version(OPENSSL_NO_GOST) {} else {
351 void ENGINE_load_gost();
352 }
353 }
354 void ENGINE_load_cryptodev();
355 void ENGINE_load_rsax();
356 void ENGINE_load_rdrand();
357 void ENGINE_load_builtin_engines();
358 
359 /* Get and set global flags (ENGINE_TABLE_FLAG_***) for the implementation
360  * "registry" handling. */
361 uint ENGINE_get_table_flags();
362 void ENGINE_set_table_flags(uint flags);
363 
364 /* Manage registration of ENGINEs per "table". For each type, there are 3
365  * functions;
366  *  ENGINE_register_***(e) - registers the implementation from 'e' (if it has one)
367  *  ENGINE_unregister_***(e) - unregister the implementation from 'e'
368  *  ENGINE_register_all_***() - call ENGINE_register_***() for each 'e' in the list
369  * Cleanup is automatically registered from each table when required, so
370  * ENGINE_cleanup() will reverse any "register" operations. */
371 
372 int ENGINE_register_RSA(ENGINE* e);
373 void ENGINE_unregister_RSA(ENGINE* e);
374 void ENGINE_register_all_RSA();
375 
376 int ENGINE_register_DSA(ENGINE* e);
377 void ENGINE_unregister_DSA(ENGINE* e);
378 void ENGINE_register_all_DSA();
379 
380 int ENGINE_register_ECDH(ENGINE* e);
381 void ENGINE_unregister_ECDH(ENGINE* e);
382 void ENGINE_register_all_ECDH();
383 
384 int ENGINE_register_ECDSA(ENGINE* e);
385 void ENGINE_unregister_ECDSA(ENGINE* e);
386 void ENGINE_register_all_ECDSA();
387 
388 int ENGINE_register_DH(ENGINE* e);
389 void ENGINE_unregister_DH(ENGINE* e);
390 void ENGINE_register_all_DH();
391 
392 int ENGINE_register_RAND(ENGINE* e);
393 void ENGINE_unregister_RAND(ENGINE* e);
394 void ENGINE_register_all_RAND();
395 
396 int ENGINE_register_STORE(ENGINE* e);
397 void ENGINE_unregister_STORE(ENGINE* e);
398 void ENGINE_register_all_STORE();
399 
400 int ENGINE_register_ciphers(ENGINE* e);
401 void ENGINE_unregister_ciphers(ENGINE* e);
402 void ENGINE_register_all_ciphers();
403 
404 int ENGINE_register_digests(ENGINE* e);
405 void ENGINE_unregister_digests(ENGINE* e);
406 void ENGINE_register_all_digests();
407 
408 int ENGINE_register_pkey_meths(ENGINE* e);
409 void ENGINE_unregister_pkey_meths(ENGINE* e);
410 void ENGINE_register_all_pkey_meths();
411 
412 int ENGINE_register_pkey_asn1_meths(ENGINE* e);
413 void ENGINE_unregister_pkey_asn1_meths(ENGINE* e);
414 void ENGINE_register_all_pkey_asn1_meths();
415 
416 /* These functions register all support from the above categories. Note, use of
417  * these functions can result in static linkage of code your application may not
418  * need. If you only need a subset of functionality, consider using more
419  * selective initialisation. */
420 int ENGINE_register_complete(ENGINE* e);
421 int ENGINE_register_all_complete();
422 
423 /* Send parametrised control commands to the engine. The possibilities to send
424  * down an integer, a pointer to data or a function pointer are provided. Any of
425  * the parameters may or may not be NULL, depending on the command number. In
426  * actuality, this function only requires a structural (rather than functional)
427  * reference to an engine, but many control commands may require the engine be
428  * functional. The caller should be aware of trying commands that require an
429  * operational ENGINE, and only use functional references in such situations. */
430 int ENGINE_ctrl(ENGINE* e, int cmd, c_long i, void* p, ExternC!(void function()) f);
431 
432 /* This function tests if an ENGINE-specific command is usable as a "setting".
433  * Eg. in an application's config file that gets processed through
434  * ENGINE_ctrl_cmd_string(). If this returns zero, it is not available to
435  * ENGINE_ctrl_cmd_string(), only ENGINE_ctrl(). */
436 int ENGINE_cmd_is_executable(ENGINE* e, int cmd);
437 
438 /* This function works like ENGINE_ctrl() with the exception of taking a
439  * command name instead of a command number, and can handle optional commands.
440  * See the comment on ENGINE_ctrl_cmd_string() for an explanation on how to
441  * use the cmd_name and cmd_optional. */
442 int ENGINE_ctrl_cmd(ENGINE* e, const(char)* cmd_name,
443         c_long i, void* p, ExternC!(void function()) f, int cmd_optional);
444 
445 /* This function passes a command-name and argument to an ENGINE. The cmd_name
446  * is converted to a command number and the control command is called using
447  * 'arg' as an argument (unless the ENGINE doesn't support such a command, in
448  * which case no control command is called). The command is checked for input
449  * flags, and if necessary the argument will be converted to a numeric value. If
450  * cmd_optional is non-zero, then if the ENGINE doesn't support the given
451  * cmd_name the return value will be success anyway. This function is intended
452  * for applications to use so that users (or config files) can supply
453  * engine-specific config data to the ENGINE at run-time to control behaviour of
454  * specific engines. As such, it shouldn't be used for calling ENGINE_ctrl()
455  * functions that return data, deal with binary data, or that are otherwise
456  * supposed to be used directly through ENGINE_ctrl() in application code. Any
457  * "return" data from an ENGINE_ctrl() operation in this function will be lost -
458  * the return value is interpreted as failure if the return value is zero,
459  * success otherwise, and this function returns a boolean value as a result. In
460  * other words, vendors of 'ENGINE'-enabled devices should write ENGINE
461  * implementations with parameterisations that work in this scheme, so that
462  * compliant ENGINE-based applications can work consistently with the same
463  * configuration for the same ENGINE-enabled devices, across applications. */
464 int ENGINE_ctrl_cmd_string(ENGINE* e, const(char)* cmd_name, const(char)* arg,
465 				int cmd_optional);
466 
467 /* These functions are useful for manufacturing new ENGINE structures. They
468  * don't address reference counting at all - one uses them to populate an ENGINE
469  * structure with personalised implementations of things prior to using it
470  * directly or adding it to the builtin ENGINE list in OpenSSL. These are also
471  * here so that the ENGINE structure doesn't have to be exposed and break binary
472  * compatibility! */
473 ENGINE* ENGINE_new();
474 int ENGINE_free(ENGINE* e);
475 int ENGINE_up_ref(ENGINE* e);
476 int ENGINE_set_id(ENGINE* e, const(char)* id);
477 int ENGINE_set_name(ENGINE* e, const(char)* name);
478 int ENGINE_set_RSA(ENGINE* e, const(RSA_METHOD)* rsa_meth);
479 int ENGINE_set_DSA(ENGINE* e, const(DSA_METHOD)* dsa_meth);
480 int ENGINE_set_ECDH(ENGINE* e, const(ECDH_METHOD)* ecdh_meth);
481 int ENGINE_set_ECDSA(ENGINE* e, const(ECDSA_METHOD)* ecdsa_meth);
482 int ENGINE_set_DH(ENGINE* e, const(DH_METHOD)* dh_meth);
483 int ENGINE_set_RAND(ENGINE* e, const(RAND_METHOD)* rand_meth);
484 int ENGINE_set_STORE(ENGINE* e, const(STORE_METHOD)* store_meth);
485 int ENGINE_set_destroy_function(ENGINE* e, ENGINE_GEN_INT_FUNC_PTR destroy_f);
486 int ENGINE_set_init_function(ENGINE* e, ENGINE_GEN_INT_FUNC_PTR init_f);
487 int ENGINE_set_finish_function(ENGINE* e, ENGINE_GEN_INT_FUNC_PTR finish_f);
488 int ENGINE_set_ctrl_function(ENGINE* e, ENGINE_CTRL_FUNC_PTR ctrl_f);
489 int ENGINE_set_load_privkey_function(ENGINE* e, ENGINE_LOAD_KEY_PTR loadpriv_f);
490 int ENGINE_set_load_pubkey_function(ENGINE* e, ENGINE_LOAD_KEY_PTR loadpub_f);
491 int ENGINE_set_load_ssl_client_cert_function(ENGINE* e,
492 				ENGINE_SSL_CLIENT_CERT_PTR loadssl_f);
493 int ENGINE_set_ciphers(ENGINE* e, ENGINE_CIPHERS_PTR f);
494 int ENGINE_set_digests(ENGINE* e, ENGINE_DIGESTS_PTR f);
495 int ENGINE_set_pkey_meths(ENGINE* e, ENGINE_PKEY_METHS_PTR f);
496 int ENGINE_set_pkey_asn1_meths(ENGINE* e, ENGINE_PKEY_ASN1_METHS_PTR f);
497 int ENGINE_set_flags(ENGINE* e, int flags);
498 int ENGINE_set_cmd_defns(ENGINE* e, const(ENGINE_CMD_DEFN)* defns);
499 /* These functions allow control over any per-structure ENGINE data. */
500 int ENGINE_get_ex_new_index(c_long argl, void* argp, CRYPTO_EX_new* new_func,
501 		CRYPTO_EX_dup* dup_func, CRYPTO_EX_free* free_func);
502 int ENGINE_set_ex_data(ENGINE* e, int idx, void* arg);
503 void* ENGINE_get_ex_data(const(ENGINE)* e, int idx);
504 
505 /* This function cleans up anything that needs it. Eg. the ENGINE_add() function
506  * automatically ensures the list cleanup function is registered to be called
507  * from ENGINE_cleanup(). Similarly, all ENGINE_register_*** functions ensure
508  * ENGINE_cleanup() will clean up after them. */
509 void ENGINE_cleanup();
510 
511 /* These return values from within the ENGINE structure. These can be useful
512  * with functional references as well as structural references - it depends
513  * which you obtained. Using the result for functional purposes if you only
514  * obtained a structural reference may be problematic! */
515 const(char)* ENGINE_get_id(const(ENGINE)* e);
516 const(char)* ENGINE_get_name(const(ENGINE)* e);
517 const(RSA_METHOD)* ENGINE_get_RSA(const(ENGINE)* e);
518 const(DSA_METHOD)* ENGINE_get_DSA(const(ENGINE)* e);
519 const(ECDH_METHOD)* ENGINE_get_ECDH(const(ENGINE)* e);
520 const(ECDSA_METHOD)* ENGINE_get_ECDSA(const(ENGINE)* e);
521 const(DH_METHOD)* ENGINE_get_DH(const(ENGINE)* e);
522 const(RAND_METHOD)* ENGINE_get_RAND(const(ENGINE)* e);
523 const(STORE_METHOD)* ENGINE_get_STORE(const(ENGINE)* e);
524 ENGINE_GEN_INT_FUNC_PTR ENGINE_get_destroy_function(const(ENGINE)* e);
525 ENGINE_GEN_INT_FUNC_PTR ENGINE_get_init_function(const(ENGINE)* e);
526 ENGINE_GEN_INT_FUNC_PTR ENGINE_get_finish_function(const(ENGINE)* e);
527 ENGINE_CTRL_FUNC_PTR ENGINE_get_ctrl_function(const(ENGINE)* e);
528 ENGINE_LOAD_KEY_PTR ENGINE_get_load_privkey_function(const(ENGINE)* e);
529 ENGINE_LOAD_KEY_PTR ENGINE_get_load_pubkey_function(const(ENGINE)* e);
530 ENGINE_SSL_CLIENT_CERT_PTR ENGINE_get_ssl_client_cert_function(const(ENGINE)* e);
531 ENGINE_CIPHERS_PTR ENGINE_get_ciphers(const(ENGINE)* e);
532 ENGINE_DIGESTS_PTR ENGINE_get_digests(const(ENGINE)* e);
533 ENGINE_PKEY_METHS_PTR ENGINE_get_pkey_meths(const(ENGINE)* e);
534 ENGINE_PKEY_ASN1_METHS_PTR ENGINE_get_pkey_asn1_meths(const(ENGINE)* e);
535 const(EVP_CIPHER)* ENGINE_get_cipher(ENGINE* e, int nid);
536 const(EVP_MD)* ENGINE_get_digest(ENGINE* e, int nid);
537 const(EVP_PKEY_METHOD)* ENGINE_get_pkey_meth(ENGINE* e, int nid);
538 const(EVP_PKEY_ASN1_METHOD)* ENGINE_get_pkey_asn1_meth(ENGINE* e, int nid);
539 const(EVP_PKEY_ASN1_METHOD)* ENGINE_get_pkey_asn1_meth_str(ENGINE* e,
540 					const(char)* str, int len);
541 const(EVP_PKEY_ASN1_METHOD)* ENGINE_pkey_asn1_find_str(ENGINE** pe,
542 					const(char)* str, int len);
543 const(ENGINE_CMD_DEFN)* ENGINE_get_cmd_defns(const(ENGINE)* e);
544 int ENGINE_get_flags(const(ENGINE)* e);
545 
546 /* FUNCTIONAL functions. These functions deal with ENGINE structures
547  * that have (or will) be initialised for use. Broadly speaking, the
548  * structural functions are useful for iterating the list of available
549  * engine types, creating new engine types, and other "list" operations.
550  * These functions actually deal with ENGINEs that are to be used. As
551  * such these functions can fail (if applicable) when particular
552  * engines are unavailable - eg. if a hardware accelerator is not
553  * attached or not functioning correctly. Each ENGINE has 2 reference
554  * counts; structural and functional. Every time a functional reference
555  * is obtained or released, a corresponding structural reference is
556  * automatically obtained or released too. */
557 
558 /* Initialise a engine type for use (or up its reference count if it's
559  * already in use). This will fail if the engine is not currently
560  * operational and cannot initialise. */
561 int ENGINE_init(ENGINE* e);
562 /* Free a functional reference to a engine type. This does not require
563  * a corresponding call to ENGINE_free as it also releases a structural
564  * reference. */
565 int ENGINE_finish(ENGINE* e);
566 
567 /* The following functions handle keys that are stored in some secondary
568  * location, handled by the engine.  The storage may be on a card or
569  * whatever. */
570 EVP_PKEY* ENGINE_load_private_key(ENGINE* e, const(char)* key_id,
571 	UI_METHOD* ui_method, void* callback_data);
572 EVP_PKEY* ENGINE_load_public_key(ENGINE* e, const(char)* key_id,
573 	UI_METHOD* ui_method, void* callback_data);
574 int ENGINE_load_ssl_client_cert(ENGINE* e, SSL* s,
575 	STACK_OF!(X509_NAME) *ca_dn, X509** pcert, EVP_PKEY** ppkey,
576 	STACK_OF!(X509) **pother,
577 	UI_METHOD* ui_method, void* callback_data);
578 
579 /* This returns a pointer for the current ENGINE structure that
580  * is (by default) performing any RSA operations. The value returned
581  * is an incremented reference, so it should be free'd (ENGINE_finish)
582  * before it is discarded. */
583 ENGINE* ENGINE_get_default_RSA();
584 /* Same for the other "methods" */
585 ENGINE* ENGINE_get_default_DSA();
586 ENGINE* ENGINE_get_default_ECDH();
587 ENGINE* ENGINE_get_default_ECDSA();
588 ENGINE* ENGINE_get_default_DH();
589 ENGINE* ENGINE_get_default_RAND();
590 /* These functions can be used to get a functional reference to perform
591  * ciphering or digesting corresponding to "nid". */
592 ENGINE* ENGINE_get_cipher_engine(int nid);
593 ENGINE* ENGINE_get_digest_engine(int nid);
594 ENGINE* ENGINE_get_pkey_meth_engine(int nid);
595 ENGINE* ENGINE_get_pkey_asn1_meth_engine(int nid);
596 
597 /* This sets a new default ENGINE structure for performing RSA
598  * operations. If the result is non-zero (success) then the ENGINE
599  * structure will have had its reference count up'd so the caller
600  * should still free their own reference 'e'. */
601 int ENGINE_set_default_RSA(ENGINE* e);
602 int ENGINE_set_default_string(ENGINE* e, const(char)* def_list);
603 /* Same for the other "methods" */
604 int ENGINE_set_default_DSA(ENGINE* e);
605 int ENGINE_set_default_ECDH(ENGINE* e);
606 int ENGINE_set_default_ECDSA(ENGINE* e);
607 int ENGINE_set_default_DH(ENGINE* e);
608 int ENGINE_set_default_RAND(ENGINE* e);
609 int ENGINE_set_default_ciphers(ENGINE* e);
610 int ENGINE_set_default_digests(ENGINE* e);
611 int ENGINE_set_default_pkey_meths(ENGINE* e);
612 int ENGINE_set_default_pkey_asn1_meths(ENGINE* e);
613 
614 /* The combination "set" - the flags are bitwise "OR"d from the
615  * ENGINE_METHOD_*** defines above. As with the "ENGINE_register_complete()"
616  * function, this function can result in unnecessary static linkage. If your
617  * application requires only specific functionality, consider using more
618  * selective functions. */
619 int ENGINE_set_default(ENGINE* e, uint flags);
620 
621 void ENGINE_add_conf_module();
622 
623 /* Deprecated functions ... */
624 /* int ENGINE_clear_defaults(); */
625 
626 /**************************/
627 /* DYNAMIC ENGINE SUPPORT */
628 /**************************/
629 
630 /* Binary/behaviour compatibility levels */
631 enum OSSL_DYNAMIC_VERSION = 0x00020000;
632 /* Binary versions older than this are too old for us (whether we're a loader or
633  * a loadee) */
634 enum OSSL_DYNAMIC_OLDEST = 0x00020000;
635 
636 /* When compiling an ENGINE entirely as an external shared library, loadable by
637  * the "dynamic" ENGINE, these types are needed. The 'dynamic_fns' structure
638  * type provides the calling application's (or library's) error functionality
639  * and memory management function pointers to the loaded library. These should
640  * be used/set in the loaded library code so that the loading application's
641  * 'state' will be used/changed in all operations. The 'static_state' pointer
642  * allows the loaded library to know if it shares the same static data as the
643  * calling application (or library), and thus whether these callbacks need to be
644  * set or not. */
645 alias ExternC!(void*function(size_t)) dyn_MEM_malloc_cb;
646 alias ExternC!(void*function(void*, size_t)) dyn_MEM_realloc_cb;
647 alias ExternC!(void function(void*)) dyn_MEM_free_cb;
648 struct st_dynamic_MEM_fns {
649 	dyn_MEM_malloc_cb			malloc_cb;
650 	dyn_MEM_realloc_cb			realloc_cb;
651 	dyn_MEM_free_cb				free_cb;
652 	}
653 alias st_dynamic_MEM_fns dynamic_MEM_fns;
654 /* FIXME: Perhaps the memory and locking code (crypto.h) should declare and use
655  * these types so we (and any other dependant code) can simplify a bit?? */
656 alias ExternC!(void function(int,int,const(char)*,int)) dyn_lock_locking_cb;
657 alias ExternC!(int function(int*,int,int,const(char)*,int)) dyn_lock_add_lock_cb;
658 alias ExternC!(CRYPTO_dynlock_value*function(
659 						const(char)*,int)) dyn_dynlock_create_cb;
660 alias ExternC!(void function(int,CRYPTO_dynlock_value*,
661 						const(char)*,int)) dyn_dynlock_lock_cb;
662 alias ExternC!(void function(CRYPTO_dynlock_value*,
663 						const(char)*,int)) dyn_dynlock_destroy_cb;
664 struct st_dynamic_LOCK_fns {
665 	dyn_lock_locking_cb			lock_locking_cb;
666 	dyn_lock_add_lock_cb			lock_add_lock_cb;
667 	dyn_dynlock_create_cb			dynlock_create_cb;
668 	dyn_dynlock_lock_cb			dynlock_lock_cb;
669 	dyn_dynlock_destroy_cb			dynlock_destroy_cb;
670 	}
671 alias st_dynamic_LOCK_fns dynamic_LOCK_fns;
672 /* The top-level structure */
673 struct st_dynamic_fns {
674 	void* static_state;
675 	const(ERR_FNS)* err_fns;
676 	const(CRYPTO_EX_DATA_IMPL)* ex_data_fns;
677 	dynamic_MEM_fns				mem_fns;
678 	dynamic_LOCK_fns			lock_fns;
679 	}
680 alias st_dynamic_fns dynamic_fns;
681 
682 /* The version checking function should be of this prototype. NB: The
683  * ossl_version value passed in is the OSSL_DYNAMIC_VERSION of the loading code.
684  * If this function returns zero, it indicates a (potential) version
685  * incompatibility and the loaded library doesn't believe it can proceed.
686  * Otherwise, the returned value is the (latest) version supported by the
687  * loading library. The loader may still decide that the loaded code's version
688  * is unsatisfactory and could veto the load. The function is expected to
689  * be implemented with the symbol name "v_check", and a default implementation
690  * can be fully instantiated with IMPLEMENT_DYNAMIC_CHECK_FN(). */
691 alias ExternC!(c_ulong function(c_ulong ossl_version)) dynamic_v_check_fn;
692 template IMPLEMENT_DYNAMIC_CHECK_FN() {
693 	enum IMPLEMENT_DYNAMIC_CHECK_FN = q{
694 	extern(C) c_ulong v_check(c_ulong v);
695 	extern(C) c_ulong v_check(c_ulong v) {
696 		if(v >= OSSL_DYNAMIC_OLDEST) return OSSL_DYNAMIC_VERSION;
697 		return 0; }
698 	};
699 }
700 
701 /* This function is passed the ENGINE structure to initialise with its own
702  * function and command settings. It should not adjust the structural or
703  * functional reference counts. If this function returns zero, (a) the load will
704  * be aborted, (b) the previous ENGINE state will be memcpy'd back onto the
705  * structure, and (c) the shared library will be unloaded. So implementations
706  * should do their own internal cleanup in failure circumstances otherwise they
707  * could leak. The 'id' parameter, if non-NULL, represents the ENGINE id that
708  * the loader is looking for. If this is NULL, the shared library can choose to
709  * return failure or to initialise a 'default' ENGINE. If non-NULL, the shared
710  * library must initialise only an ENGINE matching the passed 'id'. The function
711  * is expected to be implemented with the symbol name "bind_engine". A standard
712  * implementation can be instantiated with IMPLEMENT_DYNAMIC_BIND_FN(fn) where
713  * the parameter 'fn' is a callback function that populates the ENGINE structure
714  * and returns an int value (zero for failure). 'fn' should have prototype;
715  *   [static] int fn(ENGINE* e, const(char)* id); */
716 alias ExternC!(int function(ENGINE* e, const(char)* id,
717 				const(dynamic_fns)* fns)) dynamic_bind_engine;
718 template IMPLEMENT_DYNAMIC_BIND_FN(fn) {
719 	enum IMPLEMENT_DYNAMIC_BIND_FN = "
720 	extern(C)
721 	int bind_engine(ENGINE* e, const(char)* id, const(dynamic_fns)* fns);
722 	extern(C)
723 	int bind_engine(ENGINE* e, const(char)* id, const(dynamic_fns)* fns) {
724 		if(ENGINE_get_static_state() == fns->static_state) goto skip_cbs;
725 		if(!CRYPTO_set_mem_functions(fns->mem_fns.malloc_cb,
726 			fns->mem_fns.realloc_cb, fns->mem_fns.free_cb))
727 			return 0;
728 		CRYPTO_set_locking_callback(fns->lock_fns.lock_locking_cb);
729 		CRYPTO_set_add_lock_callback(fns->lock_fns.lock_add_lock_cb);
730 		CRYPTO_set_dynlock_create_callback(fns->lock_fns.dynlock_create_cb);
731 		CRYPTO_set_dynlock_lock_callback(fns->lock_fns.dynlock_lock_cb);
732 		CRYPTO_set_dynlock_destroy_callback(fns->lock_fns.dynlock_destroy_cb);
733 		if(!CRYPTO_set_ex_data_implementation(fns->ex_data_fns))
734 			return 0;
735 		if(!ERR_set_implementation(fns->err_fns)) return 0;
736 	skip_cbs:
737 		if(!" ~ fn ~ "(e,id)) return 0;
738 		return 1; }
739 	";
740 }
741 
742 /* If the loading application (or library) and the loaded ENGINE library share
743  * the same static data (eg. they're both dynamically linked to the same
744  * libcrypto.so) we need a way to avoid trying to set system callbacks - this
745  * would fail, and for the same reason that it's unnecessary to try. If the
746  * loaded ENGINE has (or gets from through the loader) its own copy of the
747  * libcrypto static data, we will need to set the callbacks. The easiest way to
748  * detect this is to have a function that returns a pointer to some static data
749  * and let the loading application and loaded ENGINE compare their respective
750  * values. */
751 void* ENGINE_get_static_state();
752 
753 version (BSD) {
754 void ENGINE_setup_bsd_cryptodev();
755 }
756 version (HAVE_CRYPTODEV) {
757 void ENGINE_setup_bsd_cryptodev();
758 }
759 
760 /* BEGIN ERROR CODES */
761 /* The following lines are auto generated by the script mkerr.pl. Any changes
762  * made after this point may be overwritten when the script is next run.
763  */
764 void ERR_load_ENGINE_strings();
765 
766 /* Error codes for the ENGINE functions. */
767 
768 /* Function codes. */
769 enum ENGINE_F_DYNAMIC_CTRL = 180;
770 enum ENGINE_F_DYNAMIC_GET_DATA_CTX = 181;
771 enum ENGINE_F_DYNAMIC_LOAD = 182;
772 enum ENGINE_F_DYNAMIC_SET_DATA_CTX = 183;
773 enum ENGINE_F_ENGINE_ADD = 105;
774 enum ENGINE_F_ENGINE_BY_ID = 106;
775 enum ENGINE_F_ENGINE_CMD_IS_EXECUTABLE = 170;
776 enum ENGINE_F_ENGINE_CTRL = 142;
777 enum ENGINE_F_ENGINE_CTRL_CMD = 178;
778 enum ENGINE_F_ENGINE_CTRL_CMD_STRING = 171;
779 enum ENGINE_F_ENGINE_FINISH = 107;
780 enum ENGINE_F_ENGINE_FREE_UTIL = 108;
781 enum ENGINE_F_ENGINE_GET_CIPHER = 185;
782 enum ENGINE_F_ENGINE_GET_DEFAULT_TYPE = 177;
783 enum ENGINE_F_ENGINE_GET_DIGEST = 186;
784 enum ENGINE_F_ENGINE_GET_NEXT = 115;
785 enum ENGINE_F_ENGINE_GET_PKEY_ASN1_METH = 193;
786 enum ENGINE_F_ENGINE_GET_PKEY_METH = 192;
787 enum ENGINE_F_ENGINE_GET_PREV = 116;
788 enum ENGINE_F_ENGINE_INIT = 119;
789 enum ENGINE_F_ENGINE_LIST_ADD = 120;
790 enum ENGINE_F_ENGINE_LIST_REMOVE = 121;
791 enum ENGINE_F_ENGINE_LOAD_PRIVATE_KEY = 150;
792 enum ENGINE_F_ENGINE_LOAD_PUBLIC_KEY = 151;
793 enum ENGINE_F_ENGINE_LOAD_SSL_CLIENT_CERT = 194;
794 enum ENGINE_F_ENGINE_NEW = 122;
795 enum ENGINE_F_ENGINE_REMOVE = 123;
796 enum ENGINE_F_ENGINE_SET_DEFAULT_STRING = 189;
797 enum ENGINE_F_ENGINE_SET_DEFAULT_TYPE = 126;
798 enum ENGINE_F_ENGINE_SET_ID = 129;
799 enum ENGINE_F_ENGINE_SET_NAME = 130;
800 enum ENGINE_F_ENGINE_TABLE_REGISTER = 184;
801 enum ENGINE_F_ENGINE_UNLOAD_KEY = 152;
802 enum ENGINE_F_ENGINE_UNLOCKED_FINISH = 191;
803 enum ENGINE_F_ENGINE_UP_REF = 190;
804 enum ENGINE_F_INT_CTRL_HELPER = 172;
805 enum ENGINE_F_INT_ENGINE_CONFIGURE = 188;
806 enum ENGINE_F_INT_ENGINE_MODULE_INIT = 187;
807 enum ENGINE_F_LOG_MESSAGE = 141;
808 
809 /* Reason codes. */
810 enum ENGINE_R_ALREADY_LOADED = 100;
811 enum ENGINE_R_ARGUMENT_IS_NOT_A_NUMBER = 133;
812 enum ENGINE_R_CMD_NOT_EXECUTABLE = 134;
813 enum ENGINE_R_COMMAND_TAKES_INPUT = 135;
814 enum ENGINE_R_COMMAND_TAKES_NO_INPUT = 136;
815 enum ENGINE_R_CONFLICTING_ENGINE_ID = 103;
816 enum ENGINE_R_CTRL_COMMAND_NOT_IMPLEMENTED = 119;
817 enum ENGINE_R_DH_NOT_IMPLEMENTED = 139;
818 enum ENGINE_R_DSA_NOT_IMPLEMENTED = 140;
819 enum ENGINE_R_DSO_FAILURE = 104;
820 enum ENGINE_R_DSO_NOT_FOUND = 132;
821 enum ENGINE_R_ENGINES_SECTION_ERROR = 148;
822 enum ENGINE_R_ENGINE_CONFIGURATION_ERROR = 102;
823 enum ENGINE_R_ENGINE_IS_NOT_IN_LIST = 105;
824 enum ENGINE_R_ENGINE_SECTION_ERROR = 149;
825 enum ENGINE_R_FAILED_LOADING_PRIVATE_KEY = 128;
826 enum ENGINE_R_FAILED_LOADING_PUBLIC_KEY = 129;
827 enum ENGINE_R_FINISH_FAILED = 106;
828 enum ENGINE_R_GET_HANDLE_FAILED = 107;
829 enum ENGINE_R_ID_OR_NAME_MISSING = 108;
830 enum ENGINE_R_INIT_FAILED = 109;
831 enum ENGINE_R_INTERNAL_LIST_ERROR = 110;
832 enum ENGINE_R_INVALID_ARGUMENT = 143;
833 enum ENGINE_R_INVALID_CMD_NAME = 137;
834 enum ENGINE_R_INVALID_CMD_NUMBER = 138;
835 enum ENGINE_R_INVALID_INIT_VALUE = 151;
836 enum ENGINE_R_INVALID_STRING = 150;
837 enum ENGINE_R_NOT_INITIALISED = 117;
838 enum ENGINE_R_NOT_LOADED = 112;
839 enum ENGINE_R_NO_CONTROL_FUNCTION = 120;
840 enum ENGINE_R_NO_INDEX = 144;
841 enum ENGINE_R_NO_LOAD_FUNCTION = 125;
842 enum ENGINE_R_NO_REFERENCE = 130;
843 enum ENGINE_R_NO_SUCH_ENGINE = 116;
844 enum ENGINE_R_NO_UNLOAD_FUNCTION = 126;
845 enum ENGINE_R_PROVIDE_PARAMETERS = 113;
846 enum ENGINE_R_RSA_NOT_IMPLEMENTED = 141;
847 enum ENGINE_R_UNIMPLEMENTED_CIPHER = 146;
848 enum ENGINE_R_UNIMPLEMENTED_DIGEST = 147;
849 enum ENGINE_R_UNIMPLEMENTED_PUBLIC_KEY_METHOD = 101;
850 enum ENGINE_R_VERSION_INCOMPATIBILITY = 145;