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1/* $OpenBSD: engine.h,v 1.30 2014/10/18 17:20:40 jsing Exp $ */
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#ifndef HEADER_ENGINE_H
65#define HEADER_ENGINE_H
66
67#include <openssl/opensslconf.h>
68
69#ifdef OPENSSL_NO_ENGINE
70#error ENGINE is disabled.
71#endif
72
73#ifndef OPENSSL_NO_DEPRECATED
74#include <openssl/bn.h>
75#ifndef OPENSSL_NO_RSA
76#include <openssl/rsa.h>
77#endif
78#ifndef OPENSSL_NO_DSA
79#include <openssl/dsa.h>
80#endif
81#ifndef OPENSSL_NO_DH
82#include <openssl/dh.h>
83#endif
84#ifndef OPENSSL_NO_ECDH
85#include <openssl/ecdh.h>
86#endif
87#ifndef OPENSSL_NO_ECDSA
88#include <openssl/ecdsa.h>
89#endif
90#include <openssl/ui.h>
91#include <openssl/err.h>
92#endif
93
94#include <openssl/ossl_typ.h>
95
96#include <openssl/x509.h>
97
98#ifdef __cplusplus
99extern "C" {
100#endif
101
102/* These flags are used to control combinations of algorithm (methods)
103 * by bitwise "OR"ing. */
104#define ENGINE_METHOD_RSA (unsigned int)0x0001
105#define ENGINE_METHOD_DSA (unsigned int)0x0002
106#define ENGINE_METHOD_DH (unsigned int)0x0004
107#define ENGINE_METHOD_RAND (unsigned int)0x0008
108#define ENGINE_METHOD_ECDH (unsigned int)0x0010
109#define ENGINE_METHOD_ECDSA (unsigned int)0x0020
110#define ENGINE_METHOD_CIPHERS (unsigned int)0x0040
111#define ENGINE_METHOD_DIGESTS (unsigned int)0x0080
112#define ENGINE_METHOD_STORE (unsigned int)0x0100
113#define ENGINE_METHOD_PKEY_METHS (unsigned int)0x0200
114#define ENGINE_METHOD_PKEY_ASN1_METHS (unsigned int)0x0400
115/* Obvious all-or-nothing cases. */
116#define ENGINE_METHOD_ALL (unsigned int)0xFFFF
117#define ENGINE_METHOD_NONE (unsigned int)0x0000
118
119/* This(ese) flag(s) controls behaviour of the ENGINE_TABLE mechanism used
120 * internally to control registration of ENGINE implementations, and can be set
121 * by ENGINE_set_table_flags(). The "NOINIT" flag prevents attempts to
122 * initialise registered ENGINEs if they are not already initialised. */
123#define ENGINE_TABLE_FLAG_NOINIT (unsigned int)0x0001
124
125/* ENGINE flags that can be set by ENGINE_set_flags(). */
126/* #define ENGINE_FLAGS_MALLOCED 0x0001 */ /* Not used */
127
128/* This flag is for ENGINEs that wish to handle the various 'CMD'-related
129 * control commands on their own. Without this flag, ENGINE_ctrl() handles these
130 * control commands on behalf of the ENGINE using their "cmd_defns" data. */
131#define ENGINE_FLAGS_MANUAL_CMD_CTRL (int)0x0002
132
133/* This flag is for ENGINEs who return new duplicate structures when found via
134 * "ENGINE_by_id()". When an ENGINE must store state (eg. if ENGINE_ctrl()
135 * commands are called in sequence as part of some stateful process like
136 * key-generation setup and execution), it can set this flag - then each attempt
137 * to obtain the ENGINE will result in it being copied into a new structure.
138 * Normally, ENGINEs don't declare this flag so ENGINE_by_id() just increments
139 * the existing ENGINE's structural reference count. */
140#define ENGINE_FLAGS_BY_ID_COPY (int)0x0004
141
142/* This flag if for an ENGINE that does not want its methods registered as
143 * part of ENGINE_register_all_complete() for example if the methods are
144 * not usable as default methods.
145 */
146
147#define ENGINE_FLAGS_NO_REGISTER_ALL (int)0x0008
148
149/* ENGINEs can support their own command types, and these flags are used in
150 * ENGINE_CTRL_GET_CMD_FLAGS to indicate to the caller what kind of input each
151 * command expects. Currently only numeric and string input is supported. If a
152 * control command supports none of the _NUMERIC, _STRING, or _NO_INPUT options,
153 * then it is regarded as an "internal" control command - and not for use in
154 * config setting situations. As such, they're not available to the
155 * ENGINE_ctrl_cmd_string() function, only raw ENGINE_ctrl() access. Changes to
156 * this list of 'command types' should be reflected carefully in
157 * ENGINE_cmd_is_executable() and ENGINE_ctrl_cmd_string(). */
158
159/* accepts a 'long' input value (3rd parameter to ENGINE_ctrl) */
160#define ENGINE_CMD_FLAG_NUMERIC (unsigned int)0x0001
161/* accepts string input (cast from 'void*' to 'const char *', 4th parameter to
162 * ENGINE_ctrl) */
163#define ENGINE_CMD_FLAG_STRING (unsigned int)0x0002
164/* Indicates that the control command takes *no* input. Ie. the control command
165 * is unparameterised. */
166#define ENGINE_CMD_FLAG_NO_INPUT (unsigned int)0x0004
167/* Indicates that the control command is internal. This control command won't
168 * be shown in any output, and is only usable through the ENGINE_ctrl_cmd()
169 * function. */
170#define ENGINE_CMD_FLAG_INTERNAL (unsigned int)0x0008
171
172/* NB: These 3 control commands are deprecated and should not be used. ENGINEs
173 * relying on these commands should compile conditional support for
174 * compatibility (eg. if these symbols are defined) but should also migrate the
175 * same functionality to their own ENGINE-specific control functions that can be
176 * "discovered" by calling applications. The fact these control commands
177 * wouldn't be "executable" (ie. usable by text-based config) doesn't change the
178 * fact that application code can find and use them without requiring per-ENGINE
179 * hacking. */
180
181/* These flags are used to tell the ctrl function what should be done.
182 * All command numbers are shared between all engines, even if some don't
183 * make sense to some engines. In such a case, they do nothing but return
184 * the error ENGINE_R_CTRL_COMMAND_NOT_IMPLEMENTED. */
185#define ENGINE_CTRL_SET_LOGSTREAM 1
186#define ENGINE_CTRL_SET_PASSWORD_CALLBACK 2
187#define ENGINE_CTRL_HUP 3 /* Close and reinitialise any
188 handles/connections etc. */
189#define ENGINE_CTRL_SET_USER_INTERFACE 4 /* Alternative to callback */
190#define ENGINE_CTRL_SET_CALLBACK_DATA 5 /* User-specific data, used
191 when calling the password
192 callback and the user
193 interface */
194#define ENGINE_CTRL_LOAD_CONFIGURATION 6 /* Load a configuration, given
195 a string that represents a
196 file name or so */
197#define ENGINE_CTRL_LOAD_SECTION 7 /* Load data from a given
198 section in the already loaded
199 configuration */
200
201/* These control commands allow an application to deal with an arbitrary engine
202 * in a dynamic way. Warn: Negative return values indicate errors FOR THESE
203 * COMMANDS because zero is used to indicate 'end-of-list'. Other commands,
204 * including ENGINE-specific command types, return zero for an error.
205 *
206 * An ENGINE can choose to implement these ctrl functions, and can internally
207 * manage things however it chooses - it does so by setting the
208 * ENGINE_FLAGS_MANUAL_CMD_CTRL flag (using ENGINE_set_flags()). Otherwise the
209 * ENGINE_ctrl() code handles this on the ENGINE's behalf using the cmd_defns
210 * data (set using ENGINE_set_cmd_defns()). This means an ENGINE's ctrl()
211 * handler need only implement its own commands - the above "meta" commands will
212 * be taken care of. */
213
214/* Returns non-zero if the supplied ENGINE has a ctrl() handler. If "not", then
215 * all the remaining control commands will return failure, so it is worth
216 * checking this first if the caller is trying to "discover" the engine's
217 * capabilities and doesn't want errors generated unnecessarily. */
218#define ENGINE_CTRL_HAS_CTRL_FUNCTION 10
219/* Returns a positive command number for the first command supported by the
220 * engine. Returns zero if no ctrl commands are supported. */
221#define ENGINE_CTRL_GET_FIRST_CMD_TYPE 11
222/* The 'long' argument specifies a command implemented by the engine, and the
223 * return value is the next command supported, or zero if there are no more. */
224#define ENGINE_CTRL_GET_NEXT_CMD_TYPE 12
225/* The 'void*' argument is a command name (cast from 'const char *'), and the
226 * return value is the command that corresponds to it. */
227#define ENGINE_CTRL_GET_CMD_FROM_NAME 13
228/* The next two allow a command to be converted into its corresponding string
229 * form. In each case, the 'long' argument supplies the command. In the NAME_LEN
230 * case, the return value is the length of the command name (not counting a
231 * trailing EOL). In the NAME case, the 'void*' argument must be a string buffer
232 * large enough, and it will be populated with the name of the command (WITH a
233 * trailing EOL). */
234#define ENGINE_CTRL_GET_NAME_LEN_FROM_CMD 14
235#define ENGINE_CTRL_GET_NAME_FROM_CMD 15
236/* The next two are similar but give a "short description" of a command. */
237#define ENGINE_CTRL_GET_DESC_LEN_FROM_CMD 16
238#define ENGINE_CTRL_GET_DESC_FROM_CMD 17
239/* With this command, the return value is the OR'd combination of
240 * ENGINE_CMD_FLAG_*** values that indicate what kind of input a given
241 * engine-specific ctrl command expects. */
242#define ENGINE_CTRL_GET_CMD_FLAGS 18
243
244/* ENGINE implementations should start the numbering of their own control
245 * commands from this value. (ie. ENGINE_CMD_BASE, ENGINE_CMD_BASE + 1, etc). */
246#define ENGINE_CMD_BASE 200
247
248/* If an ENGINE supports its own specific control commands and wishes the
249 * framework to handle the above 'ENGINE_CMD_***'-manipulation commands on its
250 * behalf, it should supply a null-terminated array of ENGINE_CMD_DEFN entries
251 * to ENGINE_set_cmd_defns(). It should also implement a ctrl() handler that
252 * supports the stated commands (ie. the "cmd_num" entries as described by the
253 * array). NB: The array must be ordered in increasing order of cmd_num.
254 * "null-terminated" means that the last ENGINE_CMD_DEFN element has cmd_num set
255 * to zero and/or cmd_name set to NULL. */
256typedef 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;
262
263/* Generic function pointer */
264typedef int (*ENGINE_GEN_FUNC_PTR)(void);
265/* Generic function pointer taking no arguments */
266typedef int (*ENGINE_GEN_INT_FUNC_PTR)(ENGINE *);
267/* Specific control function pointer */
268typedef int (*ENGINE_CTRL_FUNC_PTR)(ENGINE *, int, long, void *,
269 void (*f)(void));
270/* Generic load_key function pointer */
271typedef EVP_PKEY * (*ENGINE_LOAD_KEY_PTR)(ENGINE *, const char *,
272 UI_METHOD *ui_method, void *callback_data);
273typedef int (*ENGINE_SSL_CLIENT_CERT_PTR)(ENGINE *, SSL *ssl,
274 STACK_OF(X509_NAME) *ca_dn, X509 **pcert, EVP_PKEY **pkey,
275 STACK_OF(X509) **pother, UI_METHOD *ui_method, void *callback_data);
276
277/* These callback types are for an ENGINE's handler for cipher and digest logic.
278 * These handlers have these prototypes;
279 * int foo(ENGINE *e, const EVP_CIPHER **cipher, const int **nids, int nid);
280 * int foo(ENGINE *e, const EVP_MD **digest, const int **nids, int nid);
281 * Looking at how to implement these handlers in the case of cipher support, if
282 * the framework wants the EVP_CIPHER for 'nid', it will call;
283 * foo(e, &p_evp_cipher, NULL, nid); (return zero for failure)
284 * If the framework wants a list of supported 'nid's, it will call;
285 * foo(e, NULL, &p_nids, 0); (returns number of 'nids' or -1 for error)
286 */
287/* Returns to a pointer to the array of supported cipher 'nid's. If the second
288 * parameter is non-NULL it is set to the size of the returned array. */
289typedef int (*ENGINE_CIPHERS_PTR)(ENGINE *, const EVP_CIPHER **,
290 const int **, int);
291typedef int (*ENGINE_DIGESTS_PTR)(ENGINE *, const EVP_MD **, const int **, int);
292typedef int (*ENGINE_PKEY_METHS_PTR)(ENGINE *, EVP_PKEY_METHOD **,
293 const int **, int);
294typedef int (*ENGINE_PKEY_ASN1_METHS_PTR)(ENGINE *, EVP_PKEY_ASN1_METHOD **,
295 const int **, int);
296
297/* STRUCTURE functions ... all of these functions deal with pointers to ENGINE
298 * structures where the pointers have a "structural reference". This means that
299 * their reference is to allowed access to the structure but it does not imply
300 * that the structure is functional. To simply increment or decrement the
301 * structural reference count, use ENGINE_by_id and ENGINE_free. NB: This is not
302 * required when iterating using ENGINE_get_next as it will automatically
303 * decrement the structural reference count of the "current" ENGINE and
304 * increment the structural reference count of the ENGINE it returns (unless it
305 * is NULL). */
306
307/* Get the first/last "ENGINE" type available. */
308ENGINE *ENGINE_get_first(void);
309ENGINE *ENGINE_get_last(void);
310/* Iterate to the next/previous "ENGINE" type (NULL = end of the list). */
311ENGINE *ENGINE_get_next(ENGINE *e);
312ENGINE *ENGINE_get_prev(ENGINE *e);
313/* Add another "ENGINE" type into the array. */
314int ENGINE_add(ENGINE *e);
315/* Remove an existing "ENGINE" type from the array. */
316int ENGINE_remove(ENGINE *e);
317/* Retrieve an engine from the list by its unique "id" value. */
318ENGINE *ENGINE_by_id(const char *id);
319/* Add all the built-in engines. */
320void ENGINE_load_openssl(void);
321void ENGINE_load_dynamic(void);
322#ifndef OPENSSL_NO_STATIC_ENGINE
323void ENGINE_load_padlock(void);
324#endif
325void ENGINE_load_rsax(void);
326void ENGINE_load_builtin_engines(void);
327
328/* Get and set global flags (ENGINE_TABLE_FLAG_***) for the implementation
329 * "registry" handling. */
330unsigned int ENGINE_get_table_flags(void);
331void ENGINE_set_table_flags(unsigned int flags);
332
333/* Manage registration of ENGINEs per "table". For each type, there are 3
334 * functions;
335 * ENGINE_register_***(e) - registers the implementation from 'e' (if it has one)
336 * ENGINE_unregister_***(e) - unregister the implementation from 'e'
337 * ENGINE_register_all_***() - call ENGINE_register_***() for each 'e' in the list
338 * Cleanup is automatically registered from each table when required, so
339 * ENGINE_cleanup() will reverse any "register" operations. */
340
341int ENGINE_register_RSA(ENGINE *e);
342void ENGINE_unregister_RSA(ENGINE *e);
343void ENGINE_register_all_RSA(void);
344
345int ENGINE_register_DSA(ENGINE *e);
346void ENGINE_unregister_DSA(ENGINE *e);
347void ENGINE_register_all_DSA(void);
348
349int ENGINE_register_ECDH(ENGINE *e);
350void ENGINE_unregister_ECDH(ENGINE *e);
351void ENGINE_register_all_ECDH(void);
352
353int ENGINE_register_ECDSA(ENGINE *e);
354void ENGINE_unregister_ECDSA(ENGINE *e);
355void ENGINE_register_all_ECDSA(void);
356
357int ENGINE_register_DH(ENGINE *e);
358void ENGINE_unregister_DH(ENGINE *e);
359void ENGINE_register_all_DH(void);
360
361int ENGINE_register_RAND(ENGINE *e);
362void ENGINE_unregister_RAND(ENGINE *e);
363void ENGINE_register_all_RAND(void);
364
365int ENGINE_register_STORE(ENGINE *e);
366void ENGINE_unregister_STORE(ENGINE *e);
367void ENGINE_register_all_STORE(void);
368
369int ENGINE_register_ciphers(ENGINE *e);
370void ENGINE_unregister_ciphers(ENGINE *e);
371void ENGINE_register_all_ciphers(void);
372
373int ENGINE_register_digests(ENGINE *e);
374void ENGINE_unregister_digests(ENGINE *e);
375void ENGINE_register_all_digests(void);
376
377int ENGINE_register_pkey_meths(ENGINE *e);
378void ENGINE_unregister_pkey_meths(ENGINE *e);
379void ENGINE_register_all_pkey_meths(void);
380
381int ENGINE_register_pkey_asn1_meths(ENGINE *e);
382void ENGINE_unregister_pkey_asn1_meths(ENGINE *e);
383void ENGINE_register_all_pkey_asn1_meths(void);
384
385/* These functions register all support from the above categories. Note, use of
386 * these functions can result in static linkage of code your application may not
387 * need. If you only need a subset of functionality, consider using more
388 * selective initialisation. */
389int ENGINE_register_complete(ENGINE *e);
390int ENGINE_register_all_complete(void);
391
392/* Send parametrised control commands to the engine. The possibilities to send
393 * down an integer, a pointer to data or a function pointer are provided. Any of
394 * the parameters may or may not be NULL, depending on the command number. In
395 * actuality, this function only requires a structural (rather than functional)
396 * reference to an engine, but many control commands may require the engine be
397 * functional. The caller should be aware of trying commands that require an
398 * operational ENGINE, and only use functional references in such situations. */
399int ENGINE_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)(void));
400
401/* This function tests if an ENGINE-specific command is usable as a "setting".
402 * Eg. in an application's config file that gets processed through
403 * ENGINE_ctrl_cmd_string(). If this returns zero, it is not available to
404 * ENGINE_ctrl_cmd_string(), only ENGINE_ctrl(). */
405int ENGINE_cmd_is_executable(ENGINE *e, int cmd);
406
407/* This function works like ENGINE_ctrl() with the exception of taking a
408 * command name instead of a command number, and can handle optional commands.
409 * See the comment on ENGINE_ctrl_cmd_string() for an explanation on how to
410 * use the cmd_name and cmd_optional. */
411int ENGINE_ctrl_cmd(ENGINE *e, const char *cmd_name,
412 long i, void *p, void (*f)(void), int cmd_optional);
413
414/* This function passes a command-name and argument to an ENGINE. The cmd_name
415 * is converted to a command number and the control command is called using
416 * 'arg' as an argument (unless the ENGINE doesn't support such a command, in
417 * which case no control command is called). The command is checked for input
418 * flags, and if necessary the argument will be converted to a numeric value. If
419 * cmd_optional is non-zero, then if the ENGINE doesn't support the given
420 * cmd_name the return value will be success anyway. This function is intended
421 * for applications to use so that users (or config files) can supply
422 * engine-specific config data to the ENGINE at run-time to control behaviour of
423 * specific engines. As such, it shouldn't be used for calling ENGINE_ctrl()
424 * functions that return data, deal with binary data, or that are otherwise
425 * supposed to be used directly through ENGINE_ctrl() in application code. Any
426 * "return" data from an ENGINE_ctrl() operation in this function will be lost -
427 * the return value is interpreted as failure if the return value is zero,
428 * success otherwise, and this function returns a boolean value as a result. In
429 * other words, vendors of 'ENGINE'-enabled devices should write ENGINE
430 * implementations with parameterisations that work in this scheme, so that
431 * compliant ENGINE-based applications can work consistently with the same
432 * configuration for the same ENGINE-enabled devices, across applications. */
433int ENGINE_ctrl_cmd_string(ENGINE *e, const char *cmd_name, const char *arg,
434 int cmd_optional);
435
436/* These functions are useful for manufacturing new ENGINE structures. They
437 * don't address reference counting at all - one uses them to populate an ENGINE
438 * structure with personalised implementations of things prior to using it
439 * directly or adding it to the builtin ENGINE list in OpenSSL. These are also
440 * here so that the ENGINE structure doesn't have to be exposed and break binary
441 * compatibility! */
442ENGINE *ENGINE_new(void);
443int ENGINE_free(ENGINE *e);
444int ENGINE_up_ref(ENGINE *e);
445int ENGINE_set_id(ENGINE *e, const char *id);
446int ENGINE_set_name(ENGINE *e, const char *name);
447int ENGINE_set_RSA(ENGINE *e, const RSA_METHOD *rsa_meth);
448int ENGINE_set_DSA(ENGINE *e, const DSA_METHOD *dsa_meth);
449int ENGINE_set_ECDH(ENGINE *e, const ECDH_METHOD *ecdh_meth);
450int ENGINE_set_ECDSA(ENGINE *e, const ECDSA_METHOD *ecdsa_meth);
451int ENGINE_set_DH(ENGINE *e, const DH_METHOD *dh_meth);
452int ENGINE_set_RAND(ENGINE *e, const RAND_METHOD *rand_meth);
453int ENGINE_set_STORE(ENGINE *e, const STORE_METHOD *store_meth);
454int ENGINE_set_destroy_function(ENGINE *e, ENGINE_GEN_INT_FUNC_PTR destroy_f);
455int ENGINE_set_init_function(ENGINE *e, ENGINE_GEN_INT_FUNC_PTR init_f);
456int ENGINE_set_finish_function(ENGINE *e, ENGINE_GEN_INT_FUNC_PTR finish_f);
457int ENGINE_set_ctrl_function(ENGINE *e, ENGINE_CTRL_FUNC_PTR ctrl_f);
458int ENGINE_set_load_privkey_function(ENGINE *e, ENGINE_LOAD_KEY_PTR loadpriv_f);
459int ENGINE_set_load_pubkey_function(ENGINE *e, ENGINE_LOAD_KEY_PTR loadpub_f);
460int ENGINE_set_load_ssl_client_cert_function(ENGINE *e,
461 ENGINE_SSL_CLIENT_CERT_PTR loadssl_f);
462int ENGINE_set_ciphers(ENGINE *e, ENGINE_CIPHERS_PTR f);
463int ENGINE_set_digests(ENGINE *e, ENGINE_DIGESTS_PTR f);
464int ENGINE_set_pkey_meths(ENGINE *e, ENGINE_PKEY_METHS_PTR f);
465int ENGINE_set_pkey_asn1_meths(ENGINE *e, ENGINE_PKEY_ASN1_METHS_PTR f);
466int ENGINE_set_flags(ENGINE *e, int flags);
467int ENGINE_set_cmd_defns(ENGINE *e, const ENGINE_CMD_DEFN *defns);
468/* These functions allow control over any per-structure ENGINE data. */
469int ENGINE_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
470 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func);
471int ENGINE_set_ex_data(ENGINE *e, int idx, void *arg);
472void *ENGINE_get_ex_data(const ENGINE *e, int idx);
473
474/* This function cleans up anything that needs it. Eg. the ENGINE_add() function
475 * automatically ensures the list cleanup function is registered to be called
476 * from ENGINE_cleanup(). Similarly, all ENGINE_register_*** functions ensure
477 * ENGINE_cleanup() will clean up after them. */
478void ENGINE_cleanup(void);
479
480/* These return values from within the ENGINE structure. These can be useful
481 * with functional references as well as structural references - it depends
482 * which you obtained. Using the result for functional purposes if you only
483 * obtained a structural reference may be problematic! */
484const char *ENGINE_get_id(const ENGINE *e);
485const char *ENGINE_get_name(const ENGINE *e);
486const RSA_METHOD *ENGINE_get_RSA(const ENGINE *e);
487const DSA_METHOD *ENGINE_get_DSA(const ENGINE *e);
488const ECDH_METHOD *ENGINE_get_ECDH(const ENGINE *e);
489const ECDSA_METHOD *ENGINE_get_ECDSA(const ENGINE *e);
490const DH_METHOD *ENGINE_get_DH(const ENGINE *e);
491const RAND_METHOD *ENGINE_get_RAND(const ENGINE *e);
492const STORE_METHOD *ENGINE_get_STORE(const ENGINE *e);
493ENGINE_GEN_INT_FUNC_PTR ENGINE_get_destroy_function(const ENGINE *e);
494ENGINE_GEN_INT_FUNC_PTR ENGINE_get_init_function(const ENGINE *e);
495ENGINE_GEN_INT_FUNC_PTR ENGINE_get_finish_function(const ENGINE *e);
496ENGINE_CTRL_FUNC_PTR ENGINE_get_ctrl_function(const ENGINE *e);
497ENGINE_LOAD_KEY_PTR ENGINE_get_load_privkey_function(const ENGINE *e);
498ENGINE_LOAD_KEY_PTR ENGINE_get_load_pubkey_function(const ENGINE *e);
499ENGINE_SSL_CLIENT_CERT_PTR ENGINE_get_ssl_client_cert_function(const ENGINE *e);
500ENGINE_CIPHERS_PTR ENGINE_get_ciphers(const ENGINE *e);
501ENGINE_DIGESTS_PTR ENGINE_get_digests(const ENGINE *e);
502ENGINE_PKEY_METHS_PTR ENGINE_get_pkey_meths(const ENGINE *e);
503ENGINE_PKEY_ASN1_METHS_PTR ENGINE_get_pkey_asn1_meths(const ENGINE *e);
504const EVP_CIPHER *ENGINE_get_cipher(ENGINE *e, int nid);
505const EVP_MD *ENGINE_get_digest(ENGINE *e, int nid);
506const EVP_PKEY_METHOD *ENGINE_get_pkey_meth(ENGINE *e, int nid);
507const EVP_PKEY_ASN1_METHOD *ENGINE_get_pkey_asn1_meth(ENGINE *e, int nid);
508const EVP_PKEY_ASN1_METHOD *ENGINE_get_pkey_asn1_meth_str(ENGINE *e,
509 const char *str, int len);
510const EVP_PKEY_ASN1_METHOD *ENGINE_pkey_asn1_find_str(ENGINE **pe,
511 const char *str, int len);
512const ENGINE_CMD_DEFN *ENGINE_get_cmd_defns(const ENGINE *e);
513int ENGINE_get_flags(const ENGINE *e);
514
515/* FUNCTIONAL functions. These functions deal with ENGINE structures
516 * that have (or will) be initialised for use. Broadly speaking, the
517 * structural functions are useful for iterating the list of available
518 * engine types, creating new engine types, and other "list" operations.
519 * These functions actually deal with ENGINEs that are to be used. As
520 * such these functions can fail (if applicable) when particular
521 * engines are unavailable - eg. if a hardware accelerator is not
522 * attached or not functioning correctly. Each ENGINE has 2 reference
523 * counts; structural and functional. Every time a functional reference
524 * is obtained or released, a corresponding structural reference is
525 * automatically obtained or released too. */
526
527/* Initialise a engine type for use (or up its reference count if it's
528 * already in use). This will fail if the engine is not currently
529 * operational and cannot initialise. */
530int ENGINE_init(ENGINE *e);
531/* Free a functional reference to a engine type. This does not require
532 * a corresponding call to ENGINE_free as it also releases a structural
533 * reference. */
534int ENGINE_finish(ENGINE *e);
535
536/* The following functions handle keys that are stored in some secondary
537 * location, handled by the engine. The storage may be on a card or
538 * whatever. */
539EVP_PKEY *ENGINE_load_private_key(ENGINE *e, const char *key_id,
540 UI_METHOD *ui_method, void *callback_data);
541EVP_PKEY *ENGINE_load_public_key(ENGINE *e, const char *key_id,
542 UI_METHOD *ui_method, void *callback_data);
543int ENGINE_load_ssl_client_cert(ENGINE *e, SSL *s,
544 STACK_OF(X509_NAME) *ca_dn, X509 **pcert, EVP_PKEY **ppkey,
545 STACK_OF(X509) **pother,
546 UI_METHOD *ui_method, void *callback_data);
547
548/* This returns a pointer for the current ENGINE structure that
549 * is (by default) performing any RSA operations. The value returned
550 * is an incremented reference, so it should be free'd (ENGINE_finish)
551 * before it is discarded. */
552ENGINE *ENGINE_get_default_RSA(void);
553/* Same for the other "methods" */
554ENGINE *ENGINE_get_default_DSA(void);
555ENGINE *ENGINE_get_default_ECDH(void);
556ENGINE *ENGINE_get_default_ECDSA(void);
557ENGINE *ENGINE_get_default_DH(void);
558ENGINE *ENGINE_get_default_RAND(void);
559/* These functions can be used to get a functional reference to perform
560 * ciphering or digesting corresponding to "nid". */
561ENGINE *ENGINE_get_cipher_engine(int nid);
562ENGINE *ENGINE_get_digest_engine(int nid);
563ENGINE *ENGINE_get_pkey_meth_engine(int nid);
564ENGINE *ENGINE_get_pkey_asn1_meth_engine(int nid);
565
566/* This sets a new default ENGINE structure for performing RSA
567 * operations. If the result is non-zero (success) then the ENGINE
568 * structure will have had its reference count up'd so the caller
569 * should still free their own reference 'e'. */
570int ENGINE_set_default_RSA(ENGINE *e);
571int ENGINE_set_default_string(ENGINE *e, const char *def_list);
572/* Same for the other "methods" */
573int ENGINE_set_default_DSA(ENGINE *e);
574int ENGINE_set_default_ECDH(ENGINE *e);
575int ENGINE_set_default_ECDSA(ENGINE *e);
576int ENGINE_set_default_DH(ENGINE *e);
577int ENGINE_set_default_RAND(ENGINE *e);
578int ENGINE_set_default_ciphers(ENGINE *e);
579int ENGINE_set_default_digests(ENGINE *e);
580int ENGINE_set_default_pkey_meths(ENGINE *e);
581int ENGINE_set_default_pkey_asn1_meths(ENGINE *e);
582
583/* The combination "set" - the flags are bitwise "OR"d from the
584 * ENGINE_METHOD_*** defines above. As with the "ENGINE_register_complete()"
585 * function, this function can result in unnecessary static linkage. If your
586 * application requires only specific functionality, consider using more
587 * selective functions. */
588int ENGINE_set_default(ENGINE *e, unsigned int flags);
589
590void ENGINE_add_conf_module(void);
591
592/* Deprecated functions ... */
593/* int ENGINE_clear_defaults(void); */
594
595/**************************/
596/* DYNAMIC ENGINE SUPPORT */
597/**************************/
598
599/* Binary/behaviour compatibility levels */
600#define OSSL_DYNAMIC_VERSION (unsigned long)0x00020000
601/* Binary versions older than this are too old for us (whether we're a loader or
602 * a loadee) */
603#define OSSL_DYNAMIC_OLDEST (unsigned long)0x00020000
604
605/* When compiling an ENGINE entirely as an external shared library, loadable by
606 * the "dynamic" ENGINE, these types are needed. The 'dynamic_fns' structure
607 * type provides the calling application's (or library's) error functionality
608 * and memory management function pointers to the loaded library. These should
609 * be used/set in the loaded library code so that the loading application's
610 * 'state' will be used/changed in all operations. The 'static_state' pointer
611 * allows the loaded library to know if it shares the same static data as the
612 * calling application (or library), and thus whether these callbacks need to be
613 * set or not. */
614typedef void *(*dyn_MEM_malloc_cb)(size_t);
615typedef void *(*dyn_MEM_realloc_cb)(void *, size_t);
616typedef void (*dyn_MEM_free_cb)(void *);
617typedef struct st_dynamic_MEM_fns {
618 dyn_MEM_malloc_cb malloc_cb;
619 dyn_MEM_realloc_cb realloc_cb;
620 dyn_MEM_free_cb free_cb;
621} dynamic_MEM_fns;
622/* FIXME: Perhaps the memory and locking code (crypto.h) should declare and use
623 * these types so we (and any other dependant code) can simplify a bit?? */
624typedef void (*dyn_lock_locking_cb)(int, int, const char *, int);
625typedef int (*dyn_lock_add_lock_cb)(int*, int, int, const char *, int);
626typedef struct CRYPTO_dynlock_value *(*dyn_dynlock_create_cb)(
627 const char *, int);
628typedef void (*dyn_dynlock_lock_cb)(int, struct CRYPTO_dynlock_value *,
629 const char *, int);
630typedef void (*dyn_dynlock_destroy_cb)(struct CRYPTO_dynlock_value *,
631 const char *, int);
632typedef struct st_dynamic_LOCK_fns {
633 dyn_lock_locking_cb lock_locking_cb;
634 dyn_lock_add_lock_cb lock_add_lock_cb;
635 dyn_dynlock_create_cb dynlock_create_cb;
636 dyn_dynlock_lock_cb dynlock_lock_cb;
637 dyn_dynlock_destroy_cb dynlock_destroy_cb;
638} dynamic_LOCK_fns;
639/* The top-level structure */
640typedef struct st_dynamic_fns {
641 void *static_state;
642 const ERR_FNS *err_fns;
643 const CRYPTO_EX_DATA_IMPL *ex_data_fns;
644 dynamic_MEM_fns mem_fns;
645 dynamic_LOCK_fns lock_fns;
646} dynamic_fns;
647
648/* The version checking function should be of this prototype. NB: The
649 * ossl_version value passed in is the OSSL_DYNAMIC_VERSION of the loading code.
650 * If this function returns zero, it indicates a (potential) version
651 * incompatibility and the loaded library doesn't believe it can proceed.
652 * Otherwise, the returned value is the (latest) version supported by the
653 * loading library. The loader may still decide that the loaded code's version
654 * is unsatisfactory and could veto the load. The function is expected to
655 * be implemented with the symbol name "v_check", and a default implementation
656 * can be fully instantiated with IMPLEMENT_DYNAMIC_CHECK_FN(). */
657typedef unsigned long (*dynamic_v_check_fn)(unsigned long ossl_version);
658#define IMPLEMENT_DYNAMIC_CHECK_FN() \
659 extern unsigned long v_check(unsigned long v); \
660 extern unsigned long v_check(unsigned long v) { \
661 if(v >= OSSL_DYNAMIC_OLDEST) return OSSL_DYNAMIC_VERSION; \
662 return 0; }
663
664/* This function is passed the ENGINE structure to initialise with its own
665 * function and command settings. It should not adjust the structural or
666 * functional reference counts. If this function returns zero, (a) the load will
667 * be aborted, (b) the previous ENGINE state will be memcpy'd back onto the
668 * structure, and (c) the shared library will be unloaded. So implementations
669 * should do their own internal cleanup in failure circumstances otherwise they
670 * could leak. The 'id' parameter, if non-NULL, represents the ENGINE id that
671 * the loader is looking for. If this is NULL, the shared library can choose to
672 * return failure or to initialise a 'default' ENGINE. If non-NULL, the shared
673 * library must initialise only an ENGINE matching the passed 'id'. The function
674 * is expected to be implemented with the symbol name "bind_engine". A standard
675 * implementation can be instantiated with IMPLEMENT_DYNAMIC_BIND_FN(fn) where
676 * the parameter 'fn' is a callback function that populates the ENGINE structure
677 * and returns an int value (zero for failure). 'fn' should have prototype;
678 * [static] int fn(ENGINE *e, const char *id); */
679typedef int (*dynamic_bind_engine)(ENGINE *e, const char *id,
680 const dynamic_fns *fns);
681#define IMPLEMENT_DYNAMIC_BIND_FN(fn) \
682 extern \
683 int bind_engine(ENGINE *e, const char *id, const dynamic_fns *fns); \
684 extern \
685 int bind_engine(ENGINE *e, const char *id, const dynamic_fns *fns) { \
686 if(ENGINE_get_static_state() == fns->static_state) goto skip_cbs; \
687 if(!CRYPTO_set_mem_functions(fns->mem_fns.malloc_cb, \
688 fns->mem_fns.realloc_cb, fns->mem_fns.free_cb)) \
689 return 0; \
690 CRYPTO_set_locking_callback(fns->lock_fns.lock_locking_cb); \
691 CRYPTO_set_add_lock_callback(fns->lock_fns.lock_add_lock_cb); \
692 CRYPTO_set_dynlock_create_callback(fns->lock_fns.dynlock_create_cb); \
693 CRYPTO_set_dynlock_lock_callback(fns->lock_fns.dynlock_lock_cb); \
694 CRYPTO_set_dynlock_destroy_callback(fns->lock_fns.dynlock_destroy_cb); \
695 if(!CRYPTO_set_ex_data_implementation(fns->ex_data_fns)) \
696 return 0; \
697 if(!ERR_set_implementation(fns->err_fns)) return 0; \
698 skip_cbs: \
699 if(!fn(e,id)) return 0; \
700 return 1; }
701
702/* If the loading application (or library) and the loaded ENGINE library share
703 * the same static data (eg. they're both dynamically linked to the same
704 * libcrypto.so) we need a way to avoid trying to set system callbacks - this
705 * would fail, and for the same reason that it's unnecessary to try. If the
706 * loaded ENGINE has (or gets from through the loader) its own copy of the
707 * libcrypto static data, we will need to set the callbacks. The easiest way to
708 * detect this is to have a function that returns a pointer to some static data
709 * and let the loading application and loaded ENGINE compare their respective
710 * values. */
711 void *ENGINE_get_static_state(void);
712
713/* BEGIN ERROR CODES */
714/* The following lines are auto generated by the script mkerr.pl. Any changes
715 * made after this point may be overwritten when the script is next run.
716 */
717void ERR_load_ENGINE_strings(void);
718
719/* Error codes for the ENGINE functions. */
720
721/* Function codes. */
722#define ENGINE_F_DYNAMIC_CTRL 180
723#define ENGINE_F_DYNAMIC_GET_DATA_CTX 181
724#define ENGINE_F_DYNAMIC_LOAD 182
725#define ENGINE_F_DYNAMIC_SET_DATA_CTX 183
726#define ENGINE_F_ENGINE_ADD 105
727#define ENGINE_F_ENGINE_BY_ID 106
728#define ENGINE_F_ENGINE_CMD_IS_EXECUTABLE 170
729#define ENGINE_F_ENGINE_CTRL 142
730#define ENGINE_F_ENGINE_CTRL_CMD 178
731#define ENGINE_F_ENGINE_CTRL_CMD_STRING 171
732#define ENGINE_F_ENGINE_FINISH 107
733#define ENGINE_F_ENGINE_FREE_UTIL 108
734#define ENGINE_F_ENGINE_GET_CIPHER 185
735#define ENGINE_F_ENGINE_GET_DEFAULT_TYPE 177
736#define ENGINE_F_ENGINE_GET_DIGEST 186
737#define ENGINE_F_ENGINE_GET_NEXT 115
738#define ENGINE_F_ENGINE_GET_PKEY_ASN1_METH 193
739#define ENGINE_F_ENGINE_GET_PKEY_METH 192
740#define ENGINE_F_ENGINE_GET_PREV 116
741#define ENGINE_F_ENGINE_INIT 119
742#define ENGINE_F_ENGINE_LIST_ADD 120
743#define ENGINE_F_ENGINE_LIST_REMOVE 121
744#define ENGINE_F_ENGINE_LOAD_PRIVATE_KEY 150
745#define ENGINE_F_ENGINE_LOAD_PUBLIC_KEY 151
746#define ENGINE_F_ENGINE_LOAD_SSL_CLIENT_CERT 194
747#define ENGINE_F_ENGINE_NEW 122
748#define ENGINE_F_ENGINE_REMOVE 123
749#define ENGINE_F_ENGINE_SET_DEFAULT_STRING 189
750#define ENGINE_F_ENGINE_SET_DEFAULT_TYPE 126
751#define ENGINE_F_ENGINE_SET_ID 129
752#define ENGINE_F_ENGINE_SET_NAME 130
753#define ENGINE_F_ENGINE_TABLE_REGISTER 184
754#define ENGINE_F_ENGINE_UNLOAD_KEY 152
755#define ENGINE_F_ENGINE_UNLOCKED_FINISH 191
756#define ENGINE_F_ENGINE_UP_REF 190
757#define ENGINE_F_INT_CTRL_HELPER 172
758#define ENGINE_F_INT_ENGINE_CONFIGURE 188
759#define ENGINE_F_INT_ENGINE_MODULE_INIT 187
760#define ENGINE_F_LOG_MESSAGE 141
761
762/* Reason codes. */
763#define ENGINE_R_ALREADY_LOADED 100
764#define ENGINE_R_ARGUMENT_IS_NOT_A_NUMBER 133
765#define ENGINE_R_CMD_NOT_EXECUTABLE 134
766#define ENGINE_R_COMMAND_TAKES_INPUT 135
767#define ENGINE_R_COMMAND_TAKES_NO_INPUT 136
768#define ENGINE_R_CONFLICTING_ENGINE_ID 103
769#define ENGINE_R_CTRL_COMMAND_NOT_IMPLEMENTED 119
770#define ENGINE_R_DH_NOT_IMPLEMENTED 139
771#define ENGINE_R_DSA_NOT_IMPLEMENTED 140
772#define ENGINE_R_DSO_FAILURE 104
773#define ENGINE_R_DSO_NOT_FOUND 132
774#define ENGINE_R_ENGINES_SECTION_ERROR 148
775#define ENGINE_R_ENGINE_CONFIGURATION_ERROR 102
776#define ENGINE_R_ENGINE_IS_NOT_IN_LIST 105
777#define ENGINE_R_ENGINE_SECTION_ERROR 149
778#define ENGINE_R_FAILED_LOADING_PRIVATE_KEY 128
779#define ENGINE_R_FAILED_LOADING_PUBLIC_KEY 129
780#define ENGINE_R_FINISH_FAILED 106
781#define ENGINE_R_GET_HANDLE_FAILED 107
782#define ENGINE_R_ID_OR_NAME_MISSING 108
783#define ENGINE_R_INIT_FAILED 109
784#define ENGINE_R_INTERNAL_LIST_ERROR 110
785#define ENGINE_R_INVALID_ARGUMENT 143
786#define ENGINE_R_INVALID_CMD_NAME 137
787#define ENGINE_R_INVALID_CMD_NUMBER 138
788#define ENGINE_R_INVALID_INIT_VALUE 151
789#define ENGINE_R_INVALID_STRING 150
790#define ENGINE_R_NOT_INITIALISED 117
791#define ENGINE_R_NOT_LOADED 112
792#define ENGINE_R_NO_CONTROL_FUNCTION 120
793#define ENGINE_R_NO_INDEX 144
794#define ENGINE_R_NO_LOAD_FUNCTION 125
795#define ENGINE_R_NO_REFERENCE 130
796#define ENGINE_R_NO_SUCH_ENGINE 116
797#define ENGINE_R_NO_UNLOAD_FUNCTION 126
798#define ENGINE_R_PROVIDE_PARAMETERS 113
799#define ENGINE_R_RSA_NOT_IMPLEMENTED 141
800#define ENGINE_R_UNIMPLEMENTED_CIPHER 146
801#define ENGINE_R_UNIMPLEMENTED_DIGEST 147
802#define ENGINE_R_UNIMPLEMENTED_PUBLIC_KEY_METHOD 101
803#define ENGINE_R_VERSION_INCOMPATIBILITY 145
804
805#ifdef __cplusplus
806}
807#endif
808#endif
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-08-14 19:53:00 +0000