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/* * Copyright 2000-2018 The OpenSSL Project Authors. All Rights Reserved. * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved * * Licensed under the OpenSSL license (the "License"). You may not use * this file except in compliance with the License. You can obtain a copy * in the file LICENSE in the source distribution or at * https://www.openssl.org/source/license.html */ #ifndef HEADER_ENGINE_H # define HEADER_ENGINE_H # include <openssl/opensslconf.h> # ifndef OPENSSL_NO_ENGINE # if OPENSSL_API_COMPAT < 0x10100000L # include <openssl/bn.h> # include <openssl/rsa.h> # include <openssl/dsa.h> # include <openssl/dh.h> # include <openssl/ec.h> # include <openssl/rand.h> # include <openssl/ui.h> # include <openssl/err.h> # endif # include <openssl/ossl_typ.h> # include <openssl/symhacks.h> # include <openssl/x509.h> # include <openssl/engineerr.h> # ifdef __cplusplus extern "C" { # endif /* * These flags are used to control combinations of algorithm (methods) by * bitwise "OR"ing. */ # define ENGINE_METHOD_RSA (unsigned int)0x0001 # define ENGINE_METHOD_DSA (unsigned int)0x0002 # define ENGINE_METHOD_DH (unsigned int)0x0004 # define ENGINE_METHOD_RAND (unsigned int)0x0008 # define ENGINE_METHOD_CIPHERS (unsigned int)0x0040 # define ENGINE_METHOD_DIGESTS (unsigned int)0x0080 # define ENGINE_METHOD_PKEY_METHS (unsigned int)0x0200 # define ENGINE_METHOD_PKEY_ASN1_METHS (unsigned int)0x0400 # define ENGINE_METHOD_EC (unsigned int)0x0800 /* Obvious all-or-nothing cases. */ # define ENGINE_METHOD_ALL (unsigned int)0xFFFF # define ENGINE_METHOD_NONE (unsigned int)0x0000 /* * This(ese) flag(s) controls behaviour of the ENGINE_TABLE mechanism used * internally to control registration of ENGINE implementations, and can be * set by ENGINE_set_table_flags(). The "NOINIT" flag prevents attempts to * initialise registered ENGINEs if they are not already initialised. */ # define ENGINE_TABLE_FLAG_NOINIT (unsigned int)0x0001 /* ENGINE flags that can be set by ENGINE_set_flags(). */ /* Not used */ /* #define ENGINE_FLAGS_MALLOCED 0x0001 */ /* * This flag is for ENGINEs that wish to handle the various 'CMD'-related * control commands on their own. Without this flag, ENGINE_ctrl() handles * these control commands on behalf of the ENGINE using their "cmd_defns" * data. */ # define ENGINE_FLAGS_MANUAL_CMD_CTRL (int)0x0002 /* * This flag is for ENGINEs who return new duplicate structures when found * via "ENGINE_by_id()". When an ENGINE must store state (eg. if * ENGINE_ctrl() commands are called in sequence as part of some stateful * process like key-generation setup and execution), it can set this flag - * then each attempt to obtain the ENGINE will result in it being copied into * a new structure. Normally, ENGINEs don't declare this flag so * ENGINE_by_id() just increments the existing ENGINE's structural reference * count. */ # define ENGINE_FLAGS_BY_ID_COPY (int)0x0004 /* * This flag if for an ENGINE that does not want its methods registered as * part of ENGINE_register_all_complete() for example if the methods are not * usable as default methods. */ # define ENGINE_FLAGS_NO_REGISTER_ALL (int)0x0008 /* * ENGINEs can support their own command types, and these flags are used in * ENGINE_CTRL_GET_CMD_FLAGS to indicate to the caller what kind of input * each command expects. Currently only numeric and string input is * supported. If a control command supports none of the _NUMERIC, _STRING, or * _NO_INPUT options, then it is regarded as an "internal" control command - * and not for use in config setting situations. As such, they're not * available to the ENGINE_ctrl_cmd_string() function, only raw ENGINE_ctrl() * access. Changes to this list of 'command types' should be reflected * carefully in ENGINE_cmd_is_executable() and ENGINE_ctrl_cmd_string(). */ /* accepts a 'long' input value (3rd parameter to ENGINE_ctrl) */ # define ENGINE_CMD_FLAG_NUMERIC (unsigned int)0x0001 /* * accepts string input (cast from 'void*' to 'const char *', 4th parameter * to ENGINE_ctrl) */ # define ENGINE_CMD_FLAG_STRING (unsigned int)0x0002 /* * Indicates that the control command takes *no* input. Ie. the control * command is unparameterised. */ # define ENGINE_CMD_FLAG_NO_INPUT (unsigned int)0x0004 /* * Indicates that the control command is internal. This control command won't * be shown in any output, and is only usable through the ENGINE_ctrl_cmd() * function. */ # define ENGINE_CMD_FLAG_INTERNAL (unsigned int)0x0008 /* * NB: These 3 control commands are deprecated and should not be used. * ENGINEs relying on these commands should compile conditional support for * compatibility (eg. if these symbols are defined) but should also migrate * the same functionality to their own ENGINE-specific control functions that * can be "discovered" by calling applications. The fact these control * commands wouldn't be "executable" (ie. usable by text-based config) * doesn't change the fact that application code can find and use them * without requiring per-ENGINE hacking. */ /* * These flags are used to tell the ctrl function what should be done. All * command numbers are shared between all engines, even if some don't make * sense to some engines. In such a case, they do nothing but return the * error ENGINE_R_CTRL_COMMAND_NOT_IMPLEMENTED. */ # define ENGINE_CTRL_SET_LOGSTREAM 1 # define ENGINE_CTRL_SET_PASSWORD_CALLBACK 2 # define ENGINE_CTRL_HUP 3/* Close and reinitialise * any handles/connections * etc. */ # define ENGINE_CTRL_SET_USER_INTERFACE 4/* Alternative to callback */ # define ENGINE_CTRL_SET_CALLBACK_DATA 5/* User-specific data, used * when calling the password * callback and the user * interface */ # define ENGINE_CTRL_LOAD_CONFIGURATION 6/* Load a configuration, * given a string that * represents a file name * or so */ # define ENGINE_CTRL_LOAD_SECTION 7/* Load data from a given * section in the already * loaded configuration */ /* * These control commands allow an application to deal with an arbitrary * engine in a dynamic way. Warn: Negative return values indicate errors FOR * THESE COMMANDS because zero is used to indicate 'end-of-list'. Other * commands, including ENGINE-specific command types, return zero for an * error. An ENGINE can choose to implement these ctrl functions, and can * internally manage things however it chooses - it does so by setting the * ENGINE_FLAGS_MANUAL_CMD_CTRL flag (using ENGINE_set_flags()). Otherwise * the ENGINE_ctrl() code handles this on the ENGINE's behalf using the * cmd_defns data (set using ENGINE_set_cmd_defns()). This means an ENGINE's * ctrl() handler need only implement its own commands - the above "meta" * commands will be taken care of. */ /* * Returns non-zero if the supplied ENGINE has a ctrl() handler. If "not", * then all the remaining control commands will return failure, so it is * worth checking this first if the caller is trying to "discover" the * engine's capabilities and doesn't want errors generated unnecessarily. */ # define ENGINE_CTRL_HAS_CTRL_FUNCTION 10 /* * Returns a positive command number for the first command supported by the * engine. Returns zero if no ctrl commands are supported. */ # define ENGINE_CTRL_GET_FIRST_CMD_TYPE 11 /* * The 'long' argument specifies a command implemented by the engine, and the * return value is the next command supported, or zero if there are no more. */ # define ENGINE_CTRL_GET_NEXT_CMD_TYPE 12 /* * The 'void*' argument is a command name (cast from 'const char *'), and the * return value is the command that corresponds to it. */ # define ENGINE_CTRL_GET_CMD_FROM_NAME 13 /* * The next two allow a command to be converted into its corresponding string * form. In each case, the 'long' argument supplies the command. In the * NAME_LEN case, the return value is the length of the command name (not * counting a trailing EOL). In the NAME case, the 'void*' argument must be a * string buffer large enough, and it will be populated with the name of the * command (WITH a trailing EOL). */ # define ENGINE_CTRL_GET_NAME_LEN_FROM_CMD 14 # define ENGINE_CTRL_GET_NAME_FROM_CMD 15 /* The next two are similar but give a "short description" of a command. */ # define ENGINE_CTRL_GET_DESC_LEN_FROM_CMD 16 # define ENGINE_CTRL_GET_DESC_FROM_CMD 17 /* * With this command, the return value is the OR'd combination of * ENGINE_CMD_FLAG_*** values that indicate what kind of input a given * engine-specific ctrl command expects. */ # define ENGINE_CTRL_GET_CMD_FLAGS 18 /* * ENGINE implementations should start the numbering of their own control * commands from this value. (ie. ENGINE_CMD_BASE, ENGINE_CMD_BASE + 1, etc). */ # define ENGINE_CMD_BASE 200 /* * NB: These 2 nCipher "chil" control commands are deprecated, and their * functionality is now available through ENGINE-specific control commands * (exposed through the above-mentioned 'CMD'-handling). Code using these 2 * commands should be migrated to the more general command handling before * these are removed. */ /* Flags specific to the nCipher "chil" engine */ # define ENGINE_CTRL_CHIL_SET_FORKCHECK 100 /* * Depending on the value of the (long)i argument, this sets or * unsets the SimpleForkCheck flag in the CHIL API to enable or * disable checking and workarounds for applications that fork(). */ # define ENGINE_CTRL_CHIL_NO_LOCKING 101 /* * This prevents the initialisation function from providing mutex * callbacks to the nCipher library. */ /* * If an ENGINE supports its own specific control commands and wishes the * framework to handle the above 'ENGINE_CMD_***'-manipulation commands on * its behalf, it should supply a null-terminated array of ENGINE_CMD_DEFN * entries to ENGINE_set_cmd_defns(). It should also implement a ctrl() * handler that supports the stated commands (ie. the "cmd_num" entries as * described by the array). NB: The array must be ordered in increasing order * of cmd_num. "null-terminated" means that the last ENGINE_CMD_DEFN element * has cmd_num set to zero and/or cmd_name set to NULL. */ typedef struct ENGINE_CMD_DEFN_st { unsigned int cmd_num; /* The command number */ const char *cmd_name; /* The command name itself */ const char *cmd_desc; /* A short description of the command */ unsigned int cmd_flags; /* The input the command expects */ } ENGINE_CMD_DEFN; /* Generic function pointer */ typedef int (*ENGINE_GEN_FUNC_PTR) (void); /* Generic function pointer taking no arguments */ typedef int (*ENGINE_GEN_INT_FUNC_PTR) (ENGINE *); /* Specific control function pointer */ typedef int (*ENGINE_CTRL_FUNC_PTR) (ENGINE *, int, long, void *, void (*f) (void)); /* Generic load_key function pointer */ typedef EVP_PKEY *(*ENGINE_LOAD_KEY_PTR)(ENGINE *, const char *, UI_METHOD *ui_method, void *callback_data); typedef int (*ENGINE_SSL_CLIENT_CERT_PTR) (ENGINE *, SSL *ssl, STACK_OF(X509_NAME) *ca_dn, X509 **pcert, EVP_PKEY **pkey, STACK_OF(X509) **pother, UI_METHOD *ui_method, void *callback_data); /*- * These callback types are for an ENGINE's handler for cipher and digest logic. * These handlers have these prototypes; * int foo(ENGINE *e, const EVP_CIPHER **cipher, const int **nids, int nid); * int foo(ENGINE *e, const EVP_MD **digest, const int **nids, int nid); * Looking at how to implement these handlers in the case of cipher support, if * the framework wants the EVP_CIPHER for 'nid', it will call; * foo(e, &p_evp_cipher, NULL, nid); (return zero for failure) * If the framework wants a list of supported 'nid's, it will call; * foo(e, NULL, &p_nids, 0); (returns number of 'nids' or -1 for error) */ /* * Returns to a pointer to the array of supported cipher 'nid's. If the * second parameter is non-NULL it is set to the size of the returned array. */ typedef int (*ENGINE_CIPHERS_PTR) (ENGINE *, const EVP_CIPHER **, const int **, int); typedef int (*ENGINE_DIGESTS_PTR) (ENGINE *, const EVP_MD **, const int **, int); typedef int (*ENGINE_PKEY_METHS_PTR) (ENGINE *, EVP_PKEY_METHOD **, const int **, int); typedef int (*ENGINE_PKEY_ASN1_METHS_PTR) (ENGINE *, EVP_PKEY_ASN1_METHOD **, const int **, int); /* * STRUCTURE functions ... all of these functions deal with pointers to * ENGINE structures where the pointers have a "structural reference". This * means that their reference is to allowed access to the structure but it * does not imply that the structure is functional. To simply increment or * decrement the structural reference count, use ENGINE_by_id and * ENGINE_free. NB: This is not required when iterating using ENGINE_get_next * as it will automatically decrement the structural reference count of the * "current" ENGINE and increment the structural reference count of the * ENGINE it returns (unless it is NULL). */ /* Get the first/last "ENGINE" type available. */ ENGINE *ENGINE_get_first(void); ENGINE *ENGINE_get_last(void); /* Iterate to the next/previous "ENGINE" type (NULL = end of the list). */ ENGINE *ENGINE_get_next(ENGINE *e); ENGINE *ENGINE_get_prev(ENGINE *e); /* Add another "ENGINE" type into the array. */ int ENGINE_add(ENGINE *e); /* Remove an existing "ENGINE" type from the array. */ int ENGINE_remove(ENGINE *e); /* Retrieve an engine from the list by its unique "id" value. */ ENGINE *ENGINE_by_id(const char *id); #if OPENSSL_API_COMPAT < 0x10100000L # define ENGINE_load_openssl() \ OPENSSL_init_crypto(OPENSSL_INIT_ENGINE_OPENSSL, NULL) # define ENGINE_load_dynamic() \ OPENSSL_init_crypto(OPENSSL_INIT_ENGINE_DYNAMIC, NULL) # ifndef OPENSSL_NO_STATIC_ENGINE # define ENGINE_load_padlock() \ OPENSSL_init_crypto(OPENSSL_INIT_ENGINE_PADLOCK, NULL) # define ENGINE_load_capi() \ OPENSSL_init_crypto(OPENSSL_INIT_ENGINE_CAPI, NULL) # define ENGINE_load_afalg() \ OPENSSL_init_crypto(OPENSSL_INIT_ENGINE_AFALG, NULL) # endif # define ENGINE_load_cryptodev() \ OPENSSL_init_crypto(OPENSSL_INIT_ENGINE_CRYPTODEV, NULL) # define ENGINE_load_rdrand() \ OPENSSL_init_crypto(OPENSSL_INIT_ENGINE_RDRAND, NULL) #endif void ENGINE_load_builtin_engines(void); /* * Get and set global flags (ENGINE_TABLE_FLAG_***) for the implementation * "registry" handling. */ unsigned int ENGINE_get_table_flags(void); void ENGINE_set_table_flags(unsigned int flags); /*- Manage registration of ENGINEs per "table". For each type, there are 3 * functions; * ENGINE_register_***(e) - registers the implementation from 'e' (if it has one) * ENGINE_unregister_***(e) - unregister the implementation from 'e' * ENGINE_register_all_***() - call ENGINE_register_***() for each 'e' in the list * Cleanup is automatically registered from each table when required. */ int ENGINE_register_RSA(ENGINE *e); void ENGINE_unregister_RSA(ENGINE *e); void ENGINE_register_all_RSA(void); int ENGINE_register_DSA(ENGINE *e); void ENGINE_unregister_DSA(ENGINE *e); void ENGINE_register_all_DSA(void); int ENGINE_register_EC(ENGINE *e); void ENGINE_unregister_EC(ENGINE *e); void ENGINE_register_all_EC(void); int ENGINE_register_DH(ENGINE *e); void ENGINE_unregister_DH(ENGINE *e); void ENGINE_register_all_DH(void); int ENGINE_register_RAND(ENGINE *e); void ENGINE_unregister_RAND(ENGINE *e); void ENGINE_register_all_RAND(void); int ENGINE_register_ciphers(ENGINE *e); void ENGINE_unregister_ciphers(ENGINE *e); void ENGINE_register_all_ciphers(void); int ENGINE_register_digests(ENGINE *e); void ENGINE_unregister_digests(ENGINE *e); void ENGINE_register_all_digests(void); int ENGINE_register_pkey_meths(ENGINE *e); void ENGINE_unregister_pkey_meths(ENGINE *e); void ENGINE_register_all_pkey_meths(void); int ENGINE_register_pkey_asn1_meths(ENGINE *e); void ENGINE_unregister_pkey_asn1_meths(ENGINE *e); void ENGINE_register_all_pkey_asn1_meths(void); /* * These functions register all support from the above categories. Note, use * of these functions can result in static linkage of code your application * may not need. If you only need a subset of functionality, consider using * more selective initialisation. */ int ENGINE_register_complete(ENGINE *e); int ENGINE_register_all_complete(void); /* * Send parameterised control commands to the engine. The possibilities to * send down an integer, a pointer to data or a function pointer are * provided. Any of the parameters may or may not be NULL, depending on the * command number. In actuality, this function only requires a structural * (rather than functional) reference to an engine, but many control commands * may require the engine be functional. The caller should be aware of trying * commands that require an operational ENGINE, and only use functional * references in such situations. */ int ENGINE_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f) (void)); /* * This function tests if an ENGINE-specific command is usable as a * "setting". Eg. in an application's config file that gets processed through * ENGINE_ctrl_cmd_string(). If this returns zero, it is not available to * ENGINE_ctrl_cmd_string(), only ENGINE_ctrl(). */ int ENGINE_cmd_is_executable(ENGINE *e, int cmd); /* * This function works like ENGINE_ctrl() with the exception of taking a * command name instead of a command number, and can handle optional * commands. See the comment on ENGINE_ctrl_cmd_string() for an explanation * on how to use the cmd_name and cmd_optional. */ int ENGINE_ctrl_cmd(ENGINE *e, const char *cmd_name, long i, void *p, void (*f) (void), int cmd_optional); /* * This function passes a command-name and argument to an ENGINE. The * cmd_name is converted to a command number and the control command is * called using 'arg' as an argument (unless the ENGINE doesn't support such * a command, in which case no control command is called). The command is * checked for input flags, and if necessary the argument will be converted * to a numeric value. If cmd_optional is non-zero, then if the ENGINE * doesn't support the given cmd_name the return value will be success * anyway. This function is intended for applications to use so that users * (or config files) can supply engine-specific config data to the ENGINE at * run-time to control behaviour of specific engines. As such, it shouldn't * be used for calling ENGINE_ctrl() functions that return data, deal with * binary data, or that are otherwise supposed to be used directly through * ENGINE_ctrl() in application code. Any "return" data from an ENGINE_ctrl() * operation in this function will be lost - the return value is interpreted * as failure if the return value is zero, success otherwise, and this * function returns a boolean value as a result. In other words, vendors of * 'ENGINE'-enabled devices should write ENGINE implementations with * parameterisations that work in this scheme, so that compliant ENGINE-based * applications can work consistently with the same configuration for the * same ENGINE-enabled devices, across applications. */ int ENGINE_ctrl_cmd_string(ENGINE *e, const char *cmd_name, const char *arg, int cmd_optional); /* * These functions are useful for manufacturing new ENGINE structures. They * don't address reference counting at all - one uses them to populate an * ENGINE structure with personalised implementations of things prior to * using it directly or adding it to the builtin ENGINE list in OpenSSL. * These are also here so that the ENGINE structure doesn't have to be * exposed and break binary compatibility! */ ENGINE *ENGINE_new(void); int ENGINE_free(ENGINE *e); int ENGINE_up_ref(ENGINE *e); int ENGINE_set_id(ENGINE *e, const char *id); int ENGINE_set_name(ENGINE *e, const char *name); int ENGINE_set_RSA(ENGINE *e, const RSA_METHOD *rsa_meth); int ENGINE_set_DSA(ENGINE *e, const DSA_METHOD *dsa_meth); int ENGINE_set_EC(ENGINE *e, const EC_KEY_METHOD *ecdsa_meth); int ENGINE_set_DH(ENGINE *e, const DH_METHOD *dh_meth); int ENGINE_set_RAND(ENGINE *e, const RAND_METHOD *rand_meth); int ENGINE_set_destroy_function(ENGINE *e, ENGINE_GEN_INT_FUNC_PTR destroy_f); int ENGINE_set_init_function(ENGINE *e, ENGINE_GEN_INT_FUNC_PTR init_f); int ENGINE_set_finish_function(ENGINE *e, ENGINE_GEN_INT_FUNC_PTR finish_f); int ENGINE_set_ctrl_function(ENGINE *e, ENGINE_CTRL_FUNC_PTR ctrl_f); int ENGINE_set_load_privkey_function(ENGINE *e, ENGINE_LOAD_KEY_PTR loadpriv_f); int ENGINE_set_load_pubkey_function(ENGINE *e, ENGINE_LOAD_KEY_PTR loadpub_f); int ENGINE_set_load_ssl_client_cert_function(ENGINE *e, ENGINE_SSL_CLIENT_CERT_PTR loadssl_f); int ENGINE_set_ciphers(ENGINE *e, ENGINE_CIPHERS_PTR f); int ENGINE_set_digests(ENGINE *e, ENGINE_DIGESTS_PTR f); int ENGINE_set_pkey_meths(ENGINE *e, ENGINE_PKEY_METHS_PTR f); int ENGINE_set_pkey_asn1_meths(ENGINE *e, ENGINE_PKEY_ASN1_METHS_PTR f); int ENGINE_set_flags(ENGINE *e, int flags); int ENGINE_set_cmd_defns(ENGINE *e, const ENGINE_CMD_DEFN *defns); /* These functions allow control over any per-structure ENGINE data. */ #define ENGINE_get_ex_new_index(l, p, newf, dupf, freef) \ CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_ENGINE, l, p, newf, dupf, freef) int ENGINE_set_ex_data(ENGINE *e, int idx, void *arg); void *ENGINE_get_ex_data(const ENGINE *e, int idx); #if OPENSSL_API_COMPAT < 0x10100000L /* * This function previously cleaned up anything that needs it. Auto-deinit will * now take care of it so it is no longer required to call this function. */ # define ENGINE_cleanup() while(0) continue #endif /* * These return values from within the ENGINE structure. These can be useful * with functional references as well as structural references - it depends * which you obtained. Using the result for functional purposes if you only * obtained a structural reference may be problematic! */ const char *ENGINE_get_id(const ENGINE *e); const char *ENGINE_get_name(const ENGINE *e); const RSA_METHOD *ENGINE_get_RSA(const ENGINE *e); const DSA_METHOD *ENGINE_get_DSA(const ENGINE *e); const EC_KEY_METHOD *ENGINE_get_EC(const ENGINE *e); const DH_METHOD *ENGINE_get_DH(const ENGINE *e); const RAND_METHOD *ENGINE_get_RAND(const ENGINE *e); ENGINE_GEN_INT_FUNC_PTR ENGINE_get_destroy_function(const ENGINE *e); ENGINE_GEN_INT_FUNC_PTR ENGINE_get_init_function(const ENGINE *e); ENGINE_GEN_INT_FUNC_PTR ENGINE_get_finish_function(const ENGINE *e); ENGINE_CTRL_FUNC_PTR ENGINE_get_ctrl_function(const ENGINE *e); ENGINE_LOAD_KEY_PTR ENGINE_get_load_privkey_function(const ENGINE *e); ENGINE_LOAD_KEY_PTR ENGINE_get_load_pubkey_function(const ENGINE *e); ENGINE_SSL_CLIENT_CERT_PTR ENGINE_get_ssl_client_cert_function(const ENGINE *e); ENGINE_CIPHERS_PTR ENGINE_get_ciphers(const ENGINE *e); ENGINE_DIGESTS_PTR ENGINE_get_digests(const ENGINE *e); ENGINE_PKEY_METHS_PTR ENGINE_get_pkey_meths(const ENGINE *e); ENGINE_PKEY_ASN1_METHS_PTR ENGINE_get_pkey_asn1_meths(const ENGINE *e); const EVP_CIPHER *ENGINE_get_cipher(ENGINE *e, int nid); const EVP_MD *ENGINE_get_digest(ENGINE *e, int nid); const EVP_PKEY_METHOD *ENGINE_get_pkey_meth(ENGINE *e, int nid); const EVP_PKEY_ASN1_METHOD *ENGINE_get_pkey_asn1_meth(ENGINE *e, int nid); const EVP_PKEY_ASN1_METHOD *ENGINE_get_pkey_asn1_meth_str(ENGINE *e, const char *str, int len); const EVP_PKEY_ASN1_METHOD *ENGINE_pkey_asn1_find_str(ENGINE **pe, const char *str, int len); const ENGINE_CMD_DEFN *ENGINE_get_cmd_defns(const ENGINE *e); int ENGINE_get_flags(const ENGINE *e); /* * FUNCTIONAL functions. These functions deal with ENGINE structures that * have (or will) be initialised for use. Broadly speaking, the structural * functions are useful for iterating the list of available engine types, * creating new engine types, and other "list" operations. These functions * actually deal with ENGINEs that are to be used. As such these functions * can fail (if applicable) when particular engines are unavailable - eg. if * a hardware accelerator is not attached or not functioning correctly. Each * ENGINE has 2 reference counts; structural and functional. Every time a * functional reference is obtained or released, a corresponding structural * reference is automatically obtained or released too. */ /* * Initialise a engine type for use (or up its reference count if it's * already in use). This will fail if the engine is not currently operational * and cannot initialise. */ int ENGINE_init(ENGINE *e); /* * Free a functional reference to a engine type. This does not require a * corresponding call to ENGINE_free as it also releases a structural * reference. */ int ENGINE_finish(ENGINE *e); /* * The following functions handle keys that are stored in some secondary * location, handled by the engine. The storage may be on a card or * whatever. */ EVP_PKEY *ENGINE_load_private_key(ENGINE *e, const char *key_id, UI_METHOD *ui_method, void *callback_data); EVP_PKEY *ENGINE_load_public_key(ENGINE *e, const char *key_id, UI_METHOD *ui_method, void *callback_data); int ENGINE_load_ssl_client_cert(ENGINE *e, SSL *s, STACK_OF(X509_NAME) *ca_dn, X509 **pcert, EVP_PKEY **ppkey, STACK_OF(X509) **pother, UI_METHOD *ui_method, void *callback_data); /* * This returns a pointer for the current ENGINE structure that is (by * default) performing any RSA operations. The value returned is an * incremented reference, so it should be free'd (ENGINE_finish) before it is * discarded. */ ENGINE *ENGINE_get_default_RSA(void); /* Same for the other "methods" */ ENGINE *ENGINE_get_default_DSA(void); ENGINE *ENGINE_get_default_EC(void); ENGINE *ENGINE_get_default_DH(void); ENGINE *ENGINE_get_default_RAND(void); /* * These functions can be used to get a functional reference to perform * ciphering or digesting corresponding to "nid". */ ENGINE *ENGINE_get_cipher_engine(int nid); ENGINE *ENGINE_get_digest_engine(int nid); ENGINE *ENGINE_get_pkey_meth_engine(int nid); ENGINE *ENGINE_get_pkey_asn1_meth_engine(int nid); /* * This sets a new default ENGINE structure for performing RSA operations. If * the result is non-zero (success) then the ENGINE structure will have had * its reference count up'd so the caller should still free their own * reference 'e'. */ int ENGINE_set_default_RSA(ENGINE *e); int ENGINE_set_default_string(ENGINE *e, const char *def_list); /* Same for the other "methods" */ int ENGINE_set_default_DSA(ENGINE *e); int ENGINE_set_default_EC(ENGINE *e); int ENGINE_set_default_DH(ENGINE *e); int ENGINE_set_default_RAND(ENGINE *e); int ENGINE_set_default_ciphers(ENGINE *e); int ENGINE_set_default_digests(ENGINE *e); int ENGINE_set_default_pkey_meths(ENGINE *e); int ENGINE_set_default_pkey_asn1_meths(ENGINE *e); /* * The combination "set" - the flags are bitwise "OR"d from the * ENGINE_METHOD_*** defines above. As with the "ENGINE_register_complete()" * function, this function can result in unnecessary static linkage. If your * application requires only specific functionality, consider using more * selective functions. */ int ENGINE_set_default(ENGINE *e, unsigned int flags); void ENGINE_add_conf_module(void); /* Deprecated functions ... */ /* int ENGINE_clear_defaults(void); */ /**************************/ /* DYNAMIC ENGINE SUPPORT */ /**************************/ /* Binary/behaviour compatibility levels */ # define OSSL_DYNAMIC_VERSION (unsigned long)0x00030000 /* * Binary versions older than this are too old for us (whether we're a loader * or a loadee) */ # define OSSL_DYNAMIC_OLDEST (unsigned long)0x00030000 /* * When compiling an ENGINE entirely as an external shared library, loadable * by the "dynamic" ENGINE, these types are needed. The 'dynamic_fns' * structure type provides the calling application's (or library's) error * functionality and memory management function pointers to the loaded * library. These should be used/set in the loaded library code so that the * loading application's 'state' will be used/changed in all operations. The * 'static_state' pointer allows the loaded library to know if it shares the * same static data as the calling application (or library), and thus whether * these callbacks need to be set or not. */ typedef void *(*dyn_MEM_malloc_fn) (size_t, const char *, int); typedef void *(*dyn_MEM_realloc_fn) (void *, size_t, const char *, int); typedef void (*dyn_MEM_free_fn) (void *, const char *, int); typedef struct st_dynamic_MEM_fns { dyn_MEM_malloc_fn malloc_fn; dyn_MEM_realloc_fn realloc_fn; dyn_MEM_free_fn free_fn; } dynamic_MEM_fns; /* * FIXME: Perhaps the memory and locking code (crypto.h) should declare and * use these types so we (and any other dependent code) can simplify a bit?? */ /* The top-level structure */ typedef struct st_dynamic_fns { void *static_state; dynamic_MEM_fns mem_fns; } dynamic_fns; /* * The version checking function should be of this prototype. NB: The * ossl_version value passed in is the OSSL_DYNAMIC_VERSION of the loading * code. If this function returns zero, it indicates a (potential) version * incompatibility and the loaded library doesn't believe it can proceed. * Otherwise, the returned value is the (latest) version supported by the * loading library. The loader may still decide that the loaded code's * version is unsatisfactory and could veto the load. The function is * expected to be implemented with the symbol name "v_check", and a default * implementation can be fully instantiated with * IMPLEMENT_DYNAMIC_CHECK_FN(). */ typedef unsigned long (*dynamic_v_check_fn) (unsigned long ossl_version); # define IMPLEMENT_DYNAMIC_CHECK_FN() \ OPENSSL_EXPORT unsigned long v_check(unsigned long v); \ OPENSSL_EXPORT unsigned long v_check(unsigned long v) { \ if (v >= OSSL_DYNAMIC_OLDEST) return OSSL_DYNAMIC_VERSION; \ return 0; } /* * This function is passed the ENGINE structure to initialise with its own * function and command settings. It should not adjust the structural or * functional reference counts. If this function returns zero, (a) the load * will be aborted, (b) the previous ENGINE state will be memcpy'd back onto * the structure, and (c) the shared library will be unloaded. So * implementations should do their own internal cleanup in failure * circumstances otherwise they could leak. The 'id' parameter, if non-NULL, * represents the ENGINE id that the loader is looking for. If this is NULL, * the shared library can choose to return failure or to initialise a * 'default' ENGINE. If non-NULL, the shared library must initialise only an * ENGINE matching the passed 'id'. The function is expected to be * implemented with the symbol name "bind_engine". A standard implementation * can be instantiated with IMPLEMENT_DYNAMIC_BIND_FN(fn) where the parameter * 'fn' is a callback function that populates the ENGINE structure and * returns an int value (zero for failure). 'fn' should have prototype; * [static] int fn(ENGINE *e, const char *id); */ typedef int (*dynamic_bind_engine) (ENGINE *e, const char *id, const dynamic_fns *fns); # define IMPLEMENT_DYNAMIC_BIND_FN(fn) \ OPENSSL_EXPORT \ int bind_engine(ENGINE *e, const char *id, const dynamic_fns *fns); \ OPENSSL_EXPORT \ int bind_engine(ENGINE *e, const char *id, const dynamic_fns *fns) { \ if (ENGINE_get_static_state() == fns->static_state) goto skip_cbs; \ CRYPTO_set_mem_functions(fns->mem_fns.malloc_fn, \ fns->mem_fns.realloc_fn, \ fns->mem_fns.free_fn); \ skip_cbs: \ if (!fn(e, id)) return 0; \ return 1; } /* * If the loading application (or library) and the loaded ENGINE library * share the same static data (eg. they're both dynamically linked to the * same libcrypto.so) we need a way to avoid trying to set system callbacks - * this would fail, and for the same reason that it's unnecessary to try. If * the loaded ENGINE has (or gets from through the loader) its own copy of * the libcrypto static data, we will need to set the callbacks. The easiest * way to detect this is to have a function that returns a pointer to some * static data and let the loading application and loaded ENGINE compare * their respective values. */ void *ENGINE_get_static_state(void); # if defined(__OpenBSD__) || defined(__FreeBSD__) || defined(__DragonFly__) DEPRECATEDIN_1_1_0(void ENGINE_setup_bsd_cryptodev(void)) # endif # ifdef __cplusplus } # endif # endif #endif

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