engine.h 39 KB

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  1. /*
  2. * Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.
  3. *
  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
  8. */
  9. /* ====================================================================
  10. * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
  11. * ECDH support in OpenSSL originally developed by
  12. * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
  13. */
  14. #ifndef HEADER_ENGINE_H
  15. # define HEADER_ENGINE_H
  16. # include <openssl/opensslconf.h>
  17. # ifndef OPENSSL_NO_ENGINE
  18. # if OPENSSL_API_COMPAT < 0x10100000L
  19. # include <openssl/bn.h>
  20. # include <openssl/rsa.h>
  21. # include <openssl/dsa.h>
  22. # include <openssl/dh.h>
  23. # include <openssl/ec.h>
  24. # include <openssl/rand.h>
  25. # include <openssl/ui.h>
  26. # include <openssl/err.h>
  27. # endif
  28. # include <openssl/ossl_typ.h>
  29. # include <openssl/symhacks.h>
  30. # include <openssl/x509.h>
  31. # ifdef __cplusplus
  32. extern "C" {
  33. # endif
  34. /*
  35. * These flags are used to control combinations of algorithm (methods) by
  36. * bitwise "OR"ing.
  37. */
  38. # define ENGINE_METHOD_RSA (unsigned int)0x0001
  39. # define ENGINE_METHOD_DSA (unsigned int)0x0002
  40. # define ENGINE_METHOD_DH (unsigned int)0x0004
  41. # define ENGINE_METHOD_RAND (unsigned int)0x0008
  42. # define ENGINE_METHOD_CIPHERS (unsigned int)0x0040
  43. # define ENGINE_METHOD_DIGESTS (unsigned int)0x0080
  44. # define ENGINE_METHOD_PKEY_METHS (unsigned int)0x0200
  45. # define ENGINE_METHOD_PKEY_ASN1_METHS (unsigned int)0x0400
  46. # define ENGINE_METHOD_EC (unsigned int)0x0800
  47. /* Obvious all-or-nothing cases. */
  48. # define ENGINE_METHOD_ALL (unsigned int)0xFFFF
  49. # define ENGINE_METHOD_NONE (unsigned int)0x0000
  50. /*
  51. * This(ese) flag(s) controls behaviour of the ENGINE_TABLE mechanism used
  52. * internally to control registration of ENGINE implementations, and can be
  53. * set by ENGINE_set_table_flags(). The "NOINIT" flag prevents attempts to
  54. * initialise registered ENGINEs if they are not already initialised.
  55. */
  56. # define ENGINE_TABLE_FLAG_NOINIT (unsigned int)0x0001
  57. /* ENGINE flags that can be set by ENGINE_set_flags(). */
  58. /* Not used */
  59. /* #define ENGINE_FLAGS_MALLOCED 0x0001 */
  60. /*
  61. * This flag is for ENGINEs that wish to handle the various 'CMD'-related
  62. * control commands on their own. Without this flag, ENGINE_ctrl() handles
  63. * these control commands on behalf of the ENGINE using their "cmd_defns"
  64. * data.
  65. */
  66. # define ENGINE_FLAGS_MANUAL_CMD_CTRL (int)0x0002
  67. /*
  68. * This flag is for ENGINEs who return new duplicate structures when found
  69. * via "ENGINE_by_id()". When an ENGINE must store state (eg. if
  70. * ENGINE_ctrl() commands are called in sequence as part of some stateful
  71. * process like key-generation setup and execution), it can set this flag -
  72. * then each attempt to obtain the ENGINE will result in it being copied into
  73. * a new structure. Normally, ENGINEs don't declare this flag so
  74. * ENGINE_by_id() just increments the existing ENGINE's structural reference
  75. * count.
  76. */
  77. # define ENGINE_FLAGS_BY_ID_COPY (int)0x0004
  78. /*
  79. * This flag if for an ENGINE that does not want its methods registered as
  80. * part of ENGINE_register_all_complete() for example if the methods are not
  81. * usable as default methods.
  82. */
  83. # define ENGINE_FLAGS_NO_REGISTER_ALL (int)0x0008
  84. /*
  85. * ENGINEs can support their own command types, and these flags are used in
  86. * ENGINE_CTRL_GET_CMD_FLAGS to indicate to the caller what kind of input
  87. * each command expects. Currently only numeric and string input is
  88. * supported. If a control command supports none of the _NUMERIC, _STRING, or
  89. * _NO_INPUT options, then it is regarded as an "internal" control command -
  90. * and not for use in config setting situations. As such, they're not
  91. * available to the ENGINE_ctrl_cmd_string() function, only raw ENGINE_ctrl()
  92. * access. Changes to this list of 'command types' should be reflected
  93. * carefully in ENGINE_cmd_is_executable() and ENGINE_ctrl_cmd_string().
  94. */
  95. /* accepts a 'long' input value (3rd parameter to ENGINE_ctrl) */
  96. # define ENGINE_CMD_FLAG_NUMERIC (unsigned int)0x0001
  97. /*
  98. * accepts string input (cast from 'void*' to 'const char *', 4th parameter
  99. * to ENGINE_ctrl)
  100. */
  101. # define ENGINE_CMD_FLAG_STRING (unsigned int)0x0002
  102. /*
  103. * Indicates that the control command takes *no* input. Ie. the control
  104. * command is unparameterised.
  105. */
  106. # define ENGINE_CMD_FLAG_NO_INPUT (unsigned int)0x0004
  107. /*
  108. * Indicates that the control command is internal. This control command won't
  109. * be shown in any output, and is only usable through the ENGINE_ctrl_cmd()
  110. * function.
  111. */
  112. # define ENGINE_CMD_FLAG_INTERNAL (unsigned int)0x0008
  113. /*
  114. * NB: These 3 control commands are deprecated and should not be used.
  115. * ENGINEs relying on these commands should compile conditional support for
  116. * compatibility (eg. if these symbols are defined) but should also migrate
  117. * the same functionality to their own ENGINE-specific control functions that
  118. * can be "discovered" by calling applications. The fact these control
  119. * commands wouldn't be "executable" (ie. usable by text-based config)
  120. * doesn't change the fact that application code can find and use them
  121. * without requiring per-ENGINE hacking.
  122. */
  123. /*
  124. * These flags are used to tell the ctrl function what should be done. All
  125. * command numbers are shared between all engines, even if some don't make
  126. * sense to some engines. In such a case, they do nothing but return the
  127. * error ENGINE_R_CTRL_COMMAND_NOT_IMPLEMENTED.
  128. */
  129. # define ENGINE_CTRL_SET_LOGSTREAM 1
  130. # define ENGINE_CTRL_SET_PASSWORD_CALLBACK 2
  131. # define ENGINE_CTRL_HUP 3/* Close and reinitialise
  132. * any handles/connections
  133. * etc. */
  134. # define ENGINE_CTRL_SET_USER_INTERFACE 4/* Alternative to callback */
  135. # define ENGINE_CTRL_SET_CALLBACK_DATA 5/* User-specific data, used
  136. * when calling the password
  137. * callback and the user
  138. * interface */
  139. # define ENGINE_CTRL_LOAD_CONFIGURATION 6/* Load a configuration,
  140. * given a string that
  141. * represents a file name
  142. * or so */
  143. # define ENGINE_CTRL_LOAD_SECTION 7/* Load data from a given
  144. * section in the already
  145. * loaded configuration */
  146. /*
  147. * These control commands allow an application to deal with an arbitrary
  148. * engine in a dynamic way. Warn: Negative return values indicate errors FOR
  149. * THESE COMMANDS because zero is used to indicate 'end-of-list'. Other
  150. * commands, including ENGINE-specific command types, return zero for an
  151. * error. An ENGINE can choose to implement these ctrl functions, and can
  152. * internally manage things however it chooses - it does so by setting the
  153. * ENGINE_FLAGS_MANUAL_CMD_CTRL flag (using ENGINE_set_flags()). Otherwise
  154. * the ENGINE_ctrl() code handles this on the ENGINE's behalf using the
  155. * cmd_defns data (set using ENGINE_set_cmd_defns()). This means an ENGINE's
  156. * ctrl() handler need only implement its own commands - the above "meta"
  157. * commands will be taken care of.
  158. */
  159. /*
  160. * Returns non-zero if the supplied ENGINE has a ctrl() handler. If "not",
  161. * then all the remaining control commands will return failure, so it is
  162. * worth checking this first if the caller is trying to "discover" the
  163. * engine's capabilities and doesn't want errors generated unnecessarily.
  164. */
  165. # define ENGINE_CTRL_HAS_CTRL_FUNCTION 10
  166. /*
  167. * Returns a positive command number for the first command supported by the
  168. * engine. Returns zero if no ctrl commands are supported.
  169. */
  170. # define ENGINE_CTRL_GET_FIRST_CMD_TYPE 11
  171. /*
  172. * The 'long' argument specifies a command implemented by the engine, and the
  173. * return value is the next command supported, or zero if there are no more.
  174. */
  175. # define ENGINE_CTRL_GET_NEXT_CMD_TYPE 12
  176. /*
  177. * The 'void*' argument is a command name (cast from 'const char *'), and the
  178. * return value is the command that corresponds to it.
  179. */
  180. # define ENGINE_CTRL_GET_CMD_FROM_NAME 13
  181. /*
  182. * The next two allow a command to be converted into its corresponding string
  183. * form. In each case, the 'long' argument supplies the command. In the
  184. * NAME_LEN case, the return value is the length of the command name (not
  185. * counting a trailing EOL). In the NAME case, the 'void*' argument must be a
  186. * string buffer large enough, and it will be populated with the name of the
  187. * command (WITH a trailing EOL).
  188. */
  189. # define ENGINE_CTRL_GET_NAME_LEN_FROM_CMD 14
  190. # define ENGINE_CTRL_GET_NAME_FROM_CMD 15
  191. /* The next two are similar but give a "short description" of a command. */
  192. # define ENGINE_CTRL_GET_DESC_LEN_FROM_CMD 16
  193. # define ENGINE_CTRL_GET_DESC_FROM_CMD 17
  194. /*
  195. * With this command, the return value is the OR'd combination of
  196. * ENGINE_CMD_FLAG_*** values that indicate what kind of input a given
  197. * engine-specific ctrl command expects.
  198. */
  199. # define ENGINE_CTRL_GET_CMD_FLAGS 18
  200. /*
  201. * ENGINE implementations should start the numbering of their own control
  202. * commands from this value. (ie. ENGINE_CMD_BASE, ENGINE_CMD_BASE + 1, etc).
  203. */
  204. # define ENGINE_CMD_BASE 200
  205. /*
  206. * NB: These 2 nCipher "chil" control commands are deprecated, and their
  207. * functionality is now available through ENGINE-specific control commands
  208. * (exposed through the above-mentioned 'CMD'-handling). Code using these 2
  209. * commands should be migrated to the more general command handling before
  210. * these are removed.
  211. */
  212. /* Flags specific to the nCipher "chil" engine */
  213. # define ENGINE_CTRL_CHIL_SET_FORKCHECK 100
  214. /*
  215. * Depending on the value of the (long)i argument, this sets or
  216. * unsets the SimpleForkCheck flag in the CHIL API to enable or
  217. * disable checking and workarounds for applications that fork().
  218. */
  219. # define ENGINE_CTRL_CHIL_NO_LOCKING 101
  220. /*
  221. * This prevents the initialisation function from providing mutex
  222. * callbacks to the nCipher library.
  223. */
  224. /*
  225. * If an ENGINE supports its own specific control commands and wishes the
  226. * framework to handle the above 'ENGINE_CMD_***'-manipulation commands on
  227. * its behalf, it should supply a null-terminated array of ENGINE_CMD_DEFN
  228. * entries to ENGINE_set_cmd_defns(). It should also implement a ctrl()
  229. * handler that supports the stated commands (ie. the "cmd_num" entries as
  230. * described by the array). NB: The array must be ordered in increasing order
  231. * of cmd_num. "null-terminated" means that the last ENGINE_CMD_DEFN element
  232. * has cmd_num set to zero and/or cmd_name set to NULL.
  233. */
  234. typedef struct ENGINE_CMD_DEFN_st {
  235. unsigned int cmd_num; /* The command number */
  236. const char *cmd_name; /* The command name itself */
  237. const char *cmd_desc; /* A short description of the command */
  238. unsigned int cmd_flags; /* The input the command expects */
  239. } ENGINE_CMD_DEFN;
  240. /* Generic function pointer */
  241. typedef int (*ENGINE_GEN_FUNC_PTR) (void);
  242. /* Generic function pointer taking no arguments */
  243. typedef int (*ENGINE_GEN_INT_FUNC_PTR) (ENGINE *);
  244. /* Specific control function pointer */
  245. typedef int (*ENGINE_CTRL_FUNC_PTR) (ENGINE *, int, long, void *,
  246. void (*f) (void));
  247. /* Generic load_key function pointer */
  248. typedef EVP_PKEY *(*ENGINE_LOAD_KEY_PTR)(ENGINE *, const char *,
  249. UI_METHOD *ui_method,
  250. void *callback_data);
  251. typedef int (*ENGINE_SSL_CLIENT_CERT_PTR) (ENGINE *, SSL *ssl,
  252. STACK_OF(X509_NAME) *ca_dn,
  253. X509 **pcert, EVP_PKEY **pkey,
  254. STACK_OF(X509) **pother,
  255. UI_METHOD *ui_method,
  256. void *callback_data);
  257. /*-
  258. * These callback types are for an ENGINE's handler for cipher and digest logic.
  259. * These handlers have these prototypes;
  260. * int foo(ENGINE *e, const EVP_CIPHER **cipher, const int **nids, int nid);
  261. * int foo(ENGINE *e, const EVP_MD **digest, const int **nids, int nid);
  262. * Looking at how to implement these handlers in the case of cipher support, if
  263. * the framework wants the EVP_CIPHER for 'nid', it will call;
  264. * foo(e, &p_evp_cipher, NULL, nid); (return zero for failure)
  265. * If the framework wants a list of supported 'nid's, it will call;
  266. * foo(e, NULL, &p_nids, 0); (returns number of 'nids' or -1 for error)
  267. */
  268. /*
  269. * Returns to a pointer to the array of supported cipher 'nid's. If the
  270. * second parameter is non-NULL it is set to the size of the returned array.
  271. */
  272. typedef int (*ENGINE_CIPHERS_PTR) (ENGINE *, const EVP_CIPHER **,
  273. const int **, int);
  274. typedef int (*ENGINE_DIGESTS_PTR) (ENGINE *, const EVP_MD **, const int **,
  275. int);
  276. typedef int (*ENGINE_PKEY_METHS_PTR) (ENGINE *, EVP_PKEY_METHOD **,
  277. const int **, int);
  278. typedef int (*ENGINE_PKEY_ASN1_METHS_PTR) (ENGINE *, EVP_PKEY_ASN1_METHOD **,
  279. const int **, int);
  280. /*
  281. * STRUCTURE functions ... all of these functions deal with pointers to
  282. * ENGINE structures where the pointers have a "structural reference". This
  283. * means that their reference is to allowed access to the structure but it
  284. * does not imply that the structure is functional. To simply increment or
  285. * decrement the structural reference count, use ENGINE_by_id and
  286. * ENGINE_free. NB: This is not required when iterating using ENGINE_get_next
  287. * as it will automatically decrement the structural reference count of the
  288. * "current" ENGINE and increment the structural reference count of the
  289. * ENGINE it returns (unless it is NULL).
  290. */
  291. /* Get the first/last "ENGINE" type available. */
  292. ENGINE *ENGINE_get_first(void);
  293. ENGINE *ENGINE_get_last(void);
  294. /* Iterate to the next/previous "ENGINE" type (NULL = end of the list). */
  295. ENGINE *ENGINE_get_next(ENGINE *e);
  296. ENGINE *ENGINE_get_prev(ENGINE *e);
  297. /* Add another "ENGINE" type into the array. */
  298. int ENGINE_add(ENGINE *e);
  299. /* Remove an existing "ENGINE" type from the array. */
  300. int ENGINE_remove(ENGINE *e);
  301. /* Retrieve an engine from the list by its unique "id" value. */
  302. ENGINE *ENGINE_by_id(const char *id);
  303. #if OPENSSL_API_COMPAT < 0x10100000L
  304. # define ENGINE_load_openssl() \
  305. OPENSSL_init_crypto(OPENSSL_INIT_ENGINE_OPENSSL, NULL)
  306. # define ENGINE_load_dynamic() \
  307. OPENSSL_init_crypto(OPENSSL_INIT_ENGINE_DYNAMIC, NULL)
  308. # ifndef OPENSSL_NO_STATIC_ENGINE
  309. # define ENGINE_load_padlock() \
  310. OPENSSL_init_crypto(OPENSSL_INIT_ENGINE_PADLOCK, NULL)
  311. # define ENGINE_load_capi() \
  312. OPENSSL_init_crypto(OPENSSL_INIT_ENGINE_CAPI, NULL)
  313. # define ENGINE_load_afalg() \
  314. OPENSSL_init_crypto(OPENSSL_INIT_ENGINE_AFALG, NULL)
  315. # endif
  316. # define ENGINE_load_cryptodev() \
  317. OPENSSL_init_crypto(OPENSSL_INIT_ENGINE_CRYPTODEV, NULL)
  318. # define ENGINE_load_rdrand() \
  319. OPENSSL_init_crypto(OPENSSL_INIT_ENGINE_RDRAND, NULL)
  320. #endif
  321. void ENGINE_load_builtin_engines(void);
  322. /*
  323. * Get and set global flags (ENGINE_TABLE_FLAG_***) for the implementation
  324. * "registry" handling.
  325. */
  326. unsigned int ENGINE_get_table_flags(void);
  327. void ENGINE_set_table_flags(unsigned int flags);
  328. /*- Manage registration of ENGINEs per "table". For each type, there are 3
  329. * functions;
  330. * ENGINE_register_***(e) - registers the implementation from 'e' (if it has one)
  331. * ENGINE_unregister_***(e) - unregister the implementation from 'e'
  332. * ENGINE_register_all_***() - call ENGINE_register_***() for each 'e' in the list
  333. * Cleanup is automatically registered from each table when required.
  334. */
  335. int ENGINE_register_RSA(ENGINE *e);
  336. void ENGINE_unregister_RSA(ENGINE *e);
  337. void ENGINE_register_all_RSA(void);
  338. int ENGINE_register_DSA(ENGINE *e);
  339. void ENGINE_unregister_DSA(ENGINE *e);
  340. void ENGINE_register_all_DSA(void);
  341. int ENGINE_register_EC(ENGINE *e);
  342. void ENGINE_unregister_EC(ENGINE *e);
  343. void ENGINE_register_all_EC(void);
  344. int ENGINE_register_DH(ENGINE *e);
  345. void ENGINE_unregister_DH(ENGINE *e);
  346. void ENGINE_register_all_DH(void);
  347. int ENGINE_register_RAND(ENGINE *e);
  348. void ENGINE_unregister_RAND(ENGINE *e);
  349. void ENGINE_register_all_RAND(void);
  350. int ENGINE_register_ciphers(ENGINE *e);
  351. void ENGINE_unregister_ciphers(ENGINE *e);
  352. void ENGINE_register_all_ciphers(void);
  353. int ENGINE_register_digests(ENGINE *e);
  354. void ENGINE_unregister_digests(ENGINE *e);
  355. void ENGINE_register_all_digests(void);
  356. int ENGINE_register_pkey_meths(ENGINE *e);
  357. void ENGINE_unregister_pkey_meths(ENGINE *e);
  358. void ENGINE_register_all_pkey_meths(void);
  359. int ENGINE_register_pkey_asn1_meths(ENGINE *e);
  360. void ENGINE_unregister_pkey_asn1_meths(ENGINE *e);
  361. void ENGINE_register_all_pkey_asn1_meths(void);
  362. /*
  363. * These functions register all support from the above categories. Note, use
  364. * of these functions can result in static linkage of code your application
  365. * may not need. If you only need a subset of functionality, consider using
  366. * more selective initialisation.
  367. */
  368. int ENGINE_register_complete(ENGINE *e);
  369. int ENGINE_register_all_complete(void);
  370. /*
  371. * Send parametrised control commands to the engine. The possibilities to
  372. * send down an integer, a pointer to data or a function pointer are
  373. * provided. Any of the parameters may or may not be NULL, depending on the
  374. * command number. In actuality, this function only requires a structural
  375. * (rather than functional) reference to an engine, but many control commands
  376. * may require the engine be functional. The caller should be aware of trying
  377. * commands that require an operational ENGINE, and only use functional
  378. * references in such situations.
  379. */
  380. int ENGINE_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f) (void));
  381. /*
  382. * This function tests if an ENGINE-specific command is usable as a
  383. * "setting". Eg. in an application's config file that gets processed through
  384. * ENGINE_ctrl_cmd_string(). If this returns zero, it is not available to
  385. * ENGINE_ctrl_cmd_string(), only ENGINE_ctrl().
  386. */
  387. int ENGINE_cmd_is_executable(ENGINE *e, int cmd);
  388. /*
  389. * This function works like ENGINE_ctrl() with the exception of taking a
  390. * command name instead of a command number, and can handle optional
  391. * commands. See the comment on ENGINE_ctrl_cmd_string() for an explanation
  392. * on how to use the cmd_name and cmd_optional.
  393. */
  394. int ENGINE_ctrl_cmd(ENGINE *e, const char *cmd_name,
  395. long i, void *p, void (*f) (void), int cmd_optional);
  396. /*
  397. * This function passes a command-name and argument to an ENGINE. The
  398. * cmd_name is converted to a command number and the control command is
  399. * called using 'arg' as an argument (unless the ENGINE doesn't support such
  400. * a command, in which case no control command is called). The command is
  401. * checked for input flags, and if necessary the argument will be converted
  402. * to a numeric value. If cmd_optional is non-zero, then if the ENGINE
  403. * doesn't support the given cmd_name the return value will be success
  404. * anyway. This function is intended for applications to use so that users
  405. * (or config files) can supply engine-specific config data to the ENGINE at
  406. * run-time to control behaviour of specific engines. As such, it shouldn't
  407. * be used for calling ENGINE_ctrl() functions that return data, deal with
  408. * binary data, or that are otherwise supposed to be used directly through
  409. * ENGINE_ctrl() in application code. Any "return" data from an ENGINE_ctrl()
  410. * operation in this function will be lost - the return value is interpreted
  411. * as failure if the return value is zero, success otherwise, and this
  412. * function returns a boolean value as a result. In other words, vendors of
  413. * 'ENGINE'-enabled devices should write ENGINE implementations with
  414. * parameterisations that work in this scheme, so that compliant ENGINE-based
  415. * applications can work consistently with the same configuration for the
  416. * same ENGINE-enabled devices, across applications.
  417. */
  418. int ENGINE_ctrl_cmd_string(ENGINE *e, const char *cmd_name, const char *arg,
  419. int cmd_optional);
  420. /*
  421. * These functions are useful for manufacturing new ENGINE structures. They
  422. * don't address reference counting at all - one uses them to populate an
  423. * ENGINE structure with personalised implementations of things prior to
  424. * using it directly or adding it to the builtin ENGINE list in OpenSSL.
  425. * These are also here so that the ENGINE structure doesn't have to be
  426. * exposed and break binary compatibility!
  427. */
  428. ENGINE *ENGINE_new(void);
  429. int ENGINE_free(ENGINE *e);
  430. int ENGINE_up_ref(ENGINE *e);
  431. int ENGINE_set_id(ENGINE *e, const char *id);
  432. int ENGINE_set_name(ENGINE *e, const char *name);
  433. int ENGINE_set_RSA(ENGINE *e, const RSA_METHOD *rsa_meth);
  434. int ENGINE_set_DSA(ENGINE *e, const DSA_METHOD *dsa_meth);
  435. int ENGINE_set_EC(ENGINE *e, const EC_KEY_METHOD *ecdsa_meth);
  436. int ENGINE_set_DH(ENGINE *e, const DH_METHOD *dh_meth);
  437. int ENGINE_set_RAND(ENGINE *e, const RAND_METHOD *rand_meth);
  438. int ENGINE_set_destroy_function(ENGINE *e, ENGINE_GEN_INT_FUNC_PTR destroy_f);
  439. int ENGINE_set_init_function(ENGINE *e, ENGINE_GEN_INT_FUNC_PTR init_f);
  440. int ENGINE_set_finish_function(ENGINE *e, ENGINE_GEN_INT_FUNC_PTR finish_f);
  441. int ENGINE_set_ctrl_function(ENGINE *e, ENGINE_CTRL_FUNC_PTR ctrl_f);
  442. int ENGINE_set_load_privkey_function(ENGINE *e,
  443. ENGINE_LOAD_KEY_PTR loadpriv_f);
  444. int ENGINE_set_load_pubkey_function(ENGINE *e, ENGINE_LOAD_KEY_PTR loadpub_f);
  445. int ENGINE_set_load_ssl_client_cert_function(ENGINE *e,
  446. ENGINE_SSL_CLIENT_CERT_PTR
  447. loadssl_f);
  448. int ENGINE_set_ciphers(ENGINE *e, ENGINE_CIPHERS_PTR f);
  449. int ENGINE_set_digests(ENGINE *e, ENGINE_DIGESTS_PTR f);
  450. int ENGINE_set_pkey_meths(ENGINE *e, ENGINE_PKEY_METHS_PTR f);
  451. int ENGINE_set_pkey_asn1_meths(ENGINE *e, ENGINE_PKEY_ASN1_METHS_PTR f);
  452. int ENGINE_set_flags(ENGINE *e, int flags);
  453. int ENGINE_set_cmd_defns(ENGINE *e, const ENGINE_CMD_DEFN *defns);
  454. /* These functions allow control over any per-structure ENGINE data. */
  455. #define ENGINE_get_ex_new_index(l, p, newf, dupf, freef) \
  456. CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_ENGINE, l, p, newf, dupf, freef)
  457. int ENGINE_set_ex_data(ENGINE *e, int idx, void *arg);
  458. void *ENGINE_get_ex_data(const ENGINE *e, int idx);
  459. #if OPENSSL_API_COMPAT < 0x10100000L
  460. /*
  461. * This function previously cleaned up anything that needs it. Auto-deinit will
  462. * now take care of it so it is no longer required to call this function.
  463. */
  464. # define ENGINE_cleanup() while(0) continue
  465. #endif
  466. /*
  467. * These return values from within the ENGINE structure. These can be useful
  468. * with functional references as well as structural references - it depends
  469. * which you obtained. Using the result for functional purposes if you only
  470. * obtained a structural reference may be problematic!
  471. */
  472. const char *ENGINE_get_id(const ENGINE *e);
  473. const char *ENGINE_get_name(const ENGINE *e);
  474. const RSA_METHOD *ENGINE_get_RSA(const ENGINE *e);
  475. const DSA_METHOD *ENGINE_get_DSA(const ENGINE *e);
  476. const EC_KEY_METHOD *ENGINE_get_EC(const ENGINE *e);
  477. const DH_METHOD *ENGINE_get_DH(const ENGINE *e);
  478. const RAND_METHOD *ENGINE_get_RAND(const ENGINE *e);
  479. ENGINE_GEN_INT_FUNC_PTR ENGINE_get_destroy_function(const ENGINE *e);
  480. ENGINE_GEN_INT_FUNC_PTR ENGINE_get_init_function(const ENGINE *e);
  481. ENGINE_GEN_INT_FUNC_PTR ENGINE_get_finish_function(const ENGINE *e);
  482. ENGINE_CTRL_FUNC_PTR ENGINE_get_ctrl_function(const ENGINE *e);
  483. ENGINE_LOAD_KEY_PTR ENGINE_get_load_privkey_function(const ENGINE *e);
  484. ENGINE_LOAD_KEY_PTR ENGINE_get_load_pubkey_function(const ENGINE *e);
  485. ENGINE_SSL_CLIENT_CERT_PTR ENGINE_get_ssl_client_cert_function(const ENGINE
  486. *e);
  487. ENGINE_CIPHERS_PTR ENGINE_get_ciphers(const ENGINE *e);
  488. ENGINE_DIGESTS_PTR ENGINE_get_digests(const ENGINE *e);
  489. ENGINE_PKEY_METHS_PTR ENGINE_get_pkey_meths(const ENGINE *e);
  490. ENGINE_PKEY_ASN1_METHS_PTR ENGINE_get_pkey_asn1_meths(const ENGINE *e);
  491. const EVP_CIPHER *ENGINE_get_cipher(ENGINE *e, int nid);
  492. const EVP_MD *ENGINE_get_digest(ENGINE *e, int nid);
  493. const EVP_PKEY_METHOD *ENGINE_get_pkey_meth(ENGINE *e, int nid);
  494. const EVP_PKEY_ASN1_METHOD *ENGINE_get_pkey_asn1_meth(ENGINE *e, int nid);
  495. const EVP_PKEY_ASN1_METHOD *ENGINE_get_pkey_asn1_meth_str(ENGINE *e,
  496. const char *str,
  497. int len);
  498. const EVP_PKEY_ASN1_METHOD *ENGINE_pkey_asn1_find_str(ENGINE **pe,
  499. const char *str,
  500. int len);
  501. const ENGINE_CMD_DEFN *ENGINE_get_cmd_defns(const ENGINE *e);
  502. int ENGINE_get_flags(const ENGINE *e);
  503. /*
  504. * FUNCTIONAL functions. These functions deal with ENGINE structures that
  505. * have (or will) be initialised for use. Broadly speaking, the structural
  506. * functions are useful for iterating the list of available engine types,
  507. * creating new engine types, and other "list" operations. These functions
  508. * actually deal with ENGINEs that are to be used. As such these functions
  509. * can fail (if applicable) when particular engines are unavailable - eg. if
  510. * a hardware accelerator is not attached or not functioning correctly. Each
  511. * ENGINE has 2 reference counts; structural and functional. Every time a
  512. * functional reference is obtained or released, a corresponding structural
  513. * reference is automatically obtained or released too.
  514. */
  515. /*
  516. * Initialise a engine type for use (or up its reference count if it's
  517. * already in use). This will fail if the engine is not currently operational
  518. * and cannot initialise.
  519. */
  520. int ENGINE_init(ENGINE *e);
  521. /*
  522. * Free a functional reference to a engine type. This does not require a
  523. * corresponding call to ENGINE_free as it also releases a structural
  524. * reference.
  525. */
  526. int ENGINE_finish(ENGINE *e);
  527. /*
  528. * The following functions handle keys that are stored in some secondary
  529. * location, handled by the engine. The storage may be on a card or
  530. * whatever.
  531. */
  532. EVP_PKEY *ENGINE_load_private_key(ENGINE *e, const char *key_id,
  533. UI_METHOD *ui_method, void *callback_data);
  534. EVP_PKEY *ENGINE_load_public_key(ENGINE *e, const char *key_id,
  535. UI_METHOD *ui_method, void *callback_data);
  536. int ENGINE_load_ssl_client_cert(ENGINE *e, SSL *s,
  537. STACK_OF(X509_NAME) *ca_dn, X509 **pcert,
  538. EVP_PKEY **ppkey, STACK_OF(X509) **pother,
  539. UI_METHOD *ui_method, void *callback_data);
  540. /*
  541. * This returns a pointer for the current ENGINE structure that is (by
  542. * default) performing any RSA operations. The value returned is an
  543. * incremented reference, so it should be free'd (ENGINE_finish) before it is
  544. * discarded.
  545. */
  546. ENGINE *ENGINE_get_default_RSA(void);
  547. /* Same for the other "methods" */
  548. ENGINE *ENGINE_get_default_DSA(void);
  549. ENGINE *ENGINE_get_default_EC(void);
  550. ENGINE *ENGINE_get_default_DH(void);
  551. ENGINE *ENGINE_get_default_RAND(void);
  552. /*
  553. * These functions can be used to get a functional reference to perform
  554. * ciphering or digesting corresponding to "nid".
  555. */
  556. ENGINE *ENGINE_get_cipher_engine(int nid);
  557. ENGINE *ENGINE_get_digest_engine(int nid);
  558. ENGINE *ENGINE_get_pkey_meth_engine(int nid);
  559. ENGINE *ENGINE_get_pkey_asn1_meth_engine(int nid);
  560. /*
  561. * This sets a new default ENGINE structure for performing RSA operations. If
  562. * the result is non-zero (success) then the ENGINE structure will have had
  563. * its reference count up'd so the caller should still free their own
  564. * reference 'e'.
  565. */
  566. int ENGINE_set_default_RSA(ENGINE *e);
  567. int ENGINE_set_default_string(ENGINE *e, const char *def_list);
  568. /* Same for the other "methods" */
  569. int ENGINE_set_default_DSA(ENGINE *e);
  570. int ENGINE_set_default_EC(ENGINE *e);
  571. int ENGINE_set_default_DH(ENGINE *e);
  572. int ENGINE_set_default_RAND(ENGINE *e);
  573. int ENGINE_set_default_ciphers(ENGINE *e);
  574. int ENGINE_set_default_digests(ENGINE *e);
  575. int ENGINE_set_default_pkey_meths(ENGINE *e);
  576. int ENGINE_set_default_pkey_asn1_meths(ENGINE *e);
  577. /*
  578. * The combination "set" - the flags are bitwise "OR"d from the
  579. * ENGINE_METHOD_*** defines above. As with the "ENGINE_register_complete()"
  580. * function, this function can result in unnecessary static linkage. If your
  581. * application requires only specific functionality, consider using more
  582. * selective functions.
  583. */
  584. int ENGINE_set_default(ENGINE *e, unsigned int flags);
  585. void ENGINE_add_conf_module(void);
  586. /* Deprecated functions ... */
  587. /* int ENGINE_clear_defaults(void); */
  588. /**************************/
  589. /* DYNAMIC ENGINE SUPPORT */
  590. /**************************/
  591. /* Binary/behaviour compatibility levels */
  592. # define OSSL_DYNAMIC_VERSION (unsigned long)0x00030000
  593. /*
  594. * Binary versions older than this are too old for us (whether we're a loader
  595. * or a loadee)
  596. */
  597. # define OSSL_DYNAMIC_OLDEST (unsigned long)0x00030000
  598. /*
  599. * When compiling an ENGINE entirely as an external shared library, loadable
  600. * by the "dynamic" ENGINE, these types are needed. The 'dynamic_fns'
  601. * structure type provides the calling application's (or library's) error
  602. * functionality and memory management function pointers to the loaded
  603. * library. These should be used/set in the loaded library code so that the
  604. * loading application's 'state' will be used/changed in all operations. The
  605. * 'static_state' pointer allows the loaded library to know if it shares the
  606. * same static data as the calling application (or library), and thus whether
  607. * these callbacks need to be set or not.
  608. */
  609. typedef void *(*dyn_MEM_malloc_fn) (size_t, const char *, int);
  610. typedef void *(*dyn_MEM_realloc_fn) (void *, size_t, const char *, int);
  611. typedef void (*dyn_MEM_free_fn) (void *, const char *, int);
  612. typedef struct st_dynamic_MEM_fns {
  613. dyn_MEM_malloc_fn malloc_fn;
  614. dyn_MEM_realloc_fn realloc_fn;
  615. dyn_MEM_free_fn free_fn;
  616. } dynamic_MEM_fns;
  617. /*
  618. * FIXME: Perhaps the memory and locking code (crypto.h) should declare and
  619. * use these types so we (and any other dependent code) can simplify a bit??
  620. */
  621. /* The top-level structure */
  622. typedef struct st_dynamic_fns {
  623. void *static_state;
  624. dynamic_MEM_fns mem_fns;
  625. } dynamic_fns;
  626. /*
  627. * The version checking function should be of this prototype. NB: The
  628. * ossl_version value passed in is the OSSL_DYNAMIC_VERSION of the loading
  629. * code. If this function returns zero, it indicates a (potential) version
  630. * incompatibility and the loaded library doesn't believe it can proceed.
  631. * Otherwise, the returned value is the (latest) version supported by the
  632. * loading library. The loader may still decide that the loaded code's
  633. * version is unsatisfactory and could veto the load. The function is
  634. * expected to be implemented with the symbol name "v_check", and a default
  635. * implementation can be fully instantiated with
  636. * IMPLEMENT_DYNAMIC_CHECK_FN().
  637. */
  638. typedef unsigned long (*dynamic_v_check_fn) (unsigned long ossl_version);
  639. # define IMPLEMENT_DYNAMIC_CHECK_FN() \
  640. OPENSSL_EXPORT unsigned long v_check(unsigned long v); \
  641. OPENSSL_EXPORT unsigned long v_check(unsigned long v) { \
  642. if (v >= OSSL_DYNAMIC_OLDEST) return OSSL_DYNAMIC_VERSION; \
  643. return 0; }
  644. /*
  645. * This function is passed the ENGINE structure to initialise with its own
  646. * function and command settings. It should not adjust the structural or
  647. * functional reference counts. If this function returns zero, (a) the load
  648. * will be aborted, (b) the previous ENGINE state will be memcpy'd back onto
  649. * the structure, and (c) the shared library will be unloaded. So
  650. * implementations should do their own internal cleanup in failure
  651. * circumstances otherwise they could leak. The 'id' parameter, if non-NULL,
  652. * represents the ENGINE id that the loader is looking for. If this is NULL,
  653. * the shared library can choose to return failure or to initialise a
  654. * 'default' ENGINE. If non-NULL, the shared library must initialise only an
  655. * ENGINE matching the passed 'id'. The function is expected to be
  656. * implemented with the symbol name "bind_engine". A standard implementation
  657. * can be instantiated with IMPLEMENT_DYNAMIC_BIND_FN(fn) where the parameter
  658. * 'fn' is a callback function that populates the ENGINE structure and
  659. * returns an int value (zero for failure). 'fn' should have prototype;
  660. * [static] int fn(ENGINE *e, const char *id);
  661. */
  662. typedef int (*dynamic_bind_engine) (ENGINE *e, const char *id,
  663. const dynamic_fns *fns);
  664. # define IMPLEMENT_DYNAMIC_BIND_FN(fn) \
  665. OPENSSL_EXPORT \
  666. int bind_engine(ENGINE *e, const char *id, const dynamic_fns *fns); \
  667. OPENSSL_EXPORT \
  668. int bind_engine(ENGINE *e, const char *id, const dynamic_fns *fns) { \
  669. if (ENGINE_get_static_state() == fns->static_state) goto skip_cbs; \
  670. CRYPTO_set_mem_functions(fns->mem_fns.malloc_fn, \
  671. fns->mem_fns.realloc_fn, \
  672. fns->mem_fns.free_fn); \
  673. skip_cbs: \
  674. if (!fn(e, id)) return 0; \
  675. return 1; }
  676. /*
  677. * If the loading application (or library) and the loaded ENGINE library
  678. * share the same static data (eg. they're both dynamically linked to the
  679. * same libcrypto.so) we need a way to avoid trying to set system callbacks -
  680. * this would fail, and for the same reason that it's unnecessary to try. If
  681. * the loaded ENGINE has (or gets from through the loader) its own copy of
  682. * the libcrypto static data, we will need to set the callbacks. The easiest
  683. * way to detect this is to have a function that returns a pointer to some
  684. * static data and let the loading application and loaded ENGINE compare
  685. * their respective values.
  686. */
  687. void *ENGINE_get_static_state(void);
  688. # if defined(__OpenBSD__) || defined(__FreeBSD__) || defined(HAVE_CRYPTODEV)
  689. DEPRECATEDIN_1_1_0(void ENGINE_setup_bsd_cryptodev(void))
  690. # endif
  691. /* BEGIN ERROR CODES */
  692. /*
  693. * The following lines are auto generated by the script mkerr.pl. Any changes
  694. * made after this point may be overwritten when the script is next run.
  695. */
  696. int ERR_load_ENGINE_strings(void);
  697. /* Error codes for the ENGINE functions. */
  698. /* Function codes. */
  699. # define ENGINE_F_DYNAMIC_CTRL 180
  700. # define ENGINE_F_DYNAMIC_GET_DATA_CTX 181
  701. # define ENGINE_F_DYNAMIC_LOAD 182
  702. # define ENGINE_F_DYNAMIC_SET_DATA_CTX 183
  703. # define ENGINE_F_ENGINE_ADD 105
  704. # define ENGINE_F_ENGINE_BY_ID 106
  705. # define ENGINE_F_ENGINE_CMD_IS_EXECUTABLE 170
  706. # define ENGINE_F_ENGINE_CTRL 142
  707. # define ENGINE_F_ENGINE_CTRL_CMD 178
  708. # define ENGINE_F_ENGINE_CTRL_CMD_STRING 171
  709. # define ENGINE_F_ENGINE_FINISH 107
  710. # define ENGINE_F_ENGINE_GET_CIPHER 185
  711. # define ENGINE_F_ENGINE_GET_DIGEST 186
  712. # define ENGINE_F_ENGINE_GET_FIRST 195
  713. # define ENGINE_F_ENGINE_GET_LAST 196
  714. # define ENGINE_F_ENGINE_GET_NEXT 115
  715. # define ENGINE_F_ENGINE_GET_PKEY_ASN1_METH 193
  716. # define ENGINE_F_ENGINE_GET_PKEY_METH 192
  717. # define ENGINE_F_ENGINE_GET_PREV 116
  718. # define ENGINE_F_ENGINE_INIT 119
  719. # define ENGINE_F_ENGINE_LIST_ADD 120
  720. # define ENGINE_F_ENGINE_LIST_REMOVE 121
  721. # define ENGINE_F_ENGINE_LOAD_PRIVATE_KEY 150
  722. # define ENGINE_F_ENGINE_LOAD_PUBLIC_KEY 151
  723. # define ENGINE_F_ENGINE_LOAD_SSL_CLIENT_CERT 194
  724. # define ENGINE_F_ENGINE_NEW 122
  725. # define ENGINE_F_ENGINE_PKEY_ASN1_FIND_STR 197
  726. # define ENGINE_F_ENGINE_REMOVE 123
  727. # define ENGINE_F_ENGINE_SET_DEFAULT_STRING 189
  728. # define ENGINE_F_ENGINE_SET_ID 129
  729. # define ENGINE_F_ENGINE_SET_NAME 130
  730. # define ENGINE_F_ENGINE_TABLE_REGISTER 184
  731. # define ENGINE_F_ENGINE_UNLOCKED_FINISH 191
  732. # define ENGINE_F_ENGINE_UP_REF 190
  733. # define ENGINE_F_INT_CTRL_HELPER 172
  734. # define ENGINE_F_INT_ENGINE_CONFIGURE 188
  735. # define ENGINE_F_INT_ENGINE_MODULE_INIT 187
  736. /* Reason codes. */
  737. # define ENGINE_R_ALREADY_LOADED 100
  738. # define ENGINE_R_ARGUMENT_IS_NOT_A_NUMBER 133
  739. # define ENGINE_R_CMD_NOT_EXECUTABLE 134
  740. # define ENGINE_R_COMMAND_TAKES_INPUT 135
  741. # define ENGINE_R_COMMAND_TAKES_NO_INPUT 136
  742. # define ENGINE_R_CONFLICTING_ENGINE_ID 103
  743. # define ENGINE_R_CTRL_COMMAND_NOT_IMPLEMENTED 119
  744. # define ENGINE_R_DSO_FAILURE 104
  745. # define ENGINE_R_DSO_NOT_FOUND 132
  746. # define ENGINE_R_ENGINES_SECTION_ERROR 148
  747. # define ENGINE_R_ENGINE_CONFIGURATION_ERROR 102
  748. # define ENGINE_R_ENGINE_IS_NOT_IN_LIST 105
  749. # define ENGINE_R_ENGINE_SECTION_ERROR 149
  750. # define ENGINE_R_FAILED_LOADING_PRIVATE_KEY 128
  751. # define ENGINE_R_FAILED_LOADING_PUBLIC_KEY 129
  752. # define ENGINE_R_FINISH_FAILED 106
  753. # define ENGINE_R_ID_OR_NAME_MISSING 108
  754. # define ENGINE_R_INIT_FAILED 109
  755. # define ENGINE_R_INTERNAL_LIST_ERROR 110
  756. # define ENGINE_R_INVALID_ARGUMENT 143
  757. # define ENGINE_R_INVALID_CMD_NAME 137
  758. # define ENGINE_R_INVALID_CMD_NUMBER 138
  759. # define ENGINE_R_INVALID_INIT_VALUE 151
  760. # define ENGINE_R_INVALID_STRING 150
  761. # define ENGINE_R_NOT_INITIALISED 117
  762. # define ENGINE_R_NOT_LOADED 112
  763. # define ENGINE_R_NO_CONTROL_FUNCTION 120
  764. # define ENGINE_R_NO_INDEX 144
  765. # define ENGINE_R_NO_LOAD_FUNCTION 125
  766. # define ENGINE_R_NO_REFERENCE 130
  767. # define ENGINE_R_NO_SUCH_ENGINE 116
  768. # define ENGINE_R_UNIMPLEMENTED_CIPHER 146
  769. # define ENGINE_R_UNIMPLEMENTED_DIGEST 147
  770. # define ENGINE_R_UNIMPLEMENTED_PUBLIC_KEY_METHOD 101
  771. # define ENGINE_R_VERSION_INCOMPATIBILITY 145
  772. # ifdef __cplusplus
  773. }
  774. # endif
  775. # endif
  776. #endif