engine.h
/* openssl/engine.h */
/* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL
* project 2000.
*/
/* ====================================================================
* Copyright (c) 1999-2001 The OpenSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* licensing@OpenSSL.org.
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*
* This product includes cryptographic software written by Eric Young
* (eay@cryptsoft.com). This product includes software written by Tim
* Hudson (tjh@cryptsoft.com).
*
*/
#ifndef HEADER_ENGINE_H
#define HEADER_ENGINE_H
#include <openssl/opensslconf.h>
#ifdef OPENSSL_NO_ENGINE
#error ENGINE is disabled.
#endif
#include <openssl/ossl_typ.h>
#include <openssl/bn.h>
#ifndef OPENSSL_NO_RSA
#include <openssl/rsa.h>
#endif
#ifndef OPENSSL_NO_DSA
#include <openssl/dsa.h>
#endif
#ifndef OPENSSL_NO_DH
#include <openssl/dh.h>
#endif
#include <openssl/rand.h>
#include <openssl/ui.h>
#include <openssl/symhacks.h>
#include <openssl/err.h>
#ifdef __cplusplus
extern "C" {
#endif
/* Fixups for missing algorithms */
#ifdef OPENSSL_NO_RSA
typedef void RSA_METHOD;
#endif
#ifdef OPENSSL_NO_DSA
typedef void DSA_METHOD;
#endif
#ifdef OPENSSL_NO_DH
typedef void DH_METHOD;
#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
/* 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(). */
/* #define ENGINE_FLAGS_MALLOCED 0x0001 */ /* Not used */
/* 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
/* 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 */
/* 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)();
/* 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)());
/* Generic load_key function pointer */
typedef EVP_PKEY * (*ENGINE_LOAD_KEY_PTR)(ENGINE *, const char *,
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);
/* 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);
/* Add all the built-in engines. */
void ENGINE_load_openssl(void);
void ENGINE_load_dynamic(void);
void ENGINE_load_cswift(void);
void ENGINE_load_chil(void);
void ENGINE_load_atalla(void);
void ENGINE_load_nuron(void);
void ENGINE_load_ubsec(void);
void ENGINE_load_aep(void);
void ENGINE_load_sureware(void);
void ENGINE_load_4758cca(void);
void ENGINE_load_cryptodev(void);
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, so
* ENGINE_cleanup() will reverse any "register" operations. */
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_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);
/* 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 parametrised 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)());
/* 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)(), 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_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_ciphers(ENGINE *e, ENGINE_CIPHERS_PTR f);
int ENGINE_set_digests(ENGINE *e, ENGINE_DIGESTS_PTR f);
int ENGINE_set_flags(ENGINE *e, int flags);
int ENGINE_set_cmd_defns(ENGINE *e, const ENGINE_CMD_DEFN *defns);
/* These functions (and the "get" function lower down) allow control over any
* per-structure ENGINE data. */
int ENGINE_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func);
int ENGINE_set_ex_data(ENGINE *e, int idx, void *arg);
/* This function cleans up anything that needs it. Eg. the ENGINE_add() function
* automatically ensures the list cleanup function is registered to be called
* from ENGINE_cleanup(). Similarly, all ENGINE_register_*** functions ensure
* ENGINE_cleanup() will clean up after them. */
void ENGINE_cleanup(void);
/* 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 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_CIPHERS_PTR ENGINE_get_ciphers(const ENGINE *e);
ENGINE_DIGESTS_PTR ENGINE_get_digests(const ENGINE *e);
const EVP_CIPHER *ENGINE_get_cipher(ENGINE *e, int nid);
const EVP_MD *ENGINE_get_digest(ENGINE *e, int nid);
const ENGINE_CMD_DEFN *ENGINE_get_cmd_defns(const ENGINE *e);
int ENGINE_get_flags(const ENGINE *e);
void *ENGINE_get_ex_data(const ENGINE *e, int idx);
/* 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);
/* 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_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);
/* 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_DH(ENGINE *e);
int ENGINE_set_default_RAND(ENGINE *e);
int ENGINE_set_default_ciphers(ENGINE *e);
int ENGINE_set_default_digests(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)0x00010200
/* Binary versions older than this are too old for us (whether we're a loader or
* a loadee) */
#define OSSL_DYNAMIC_OLDEST (unsigned long)0x00010200
/* 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. */
typedef void *(*dyn_MEM_malloc_cb)(size_t);
typedef void *(*dyn_MEM_realloc_cb)(void *, size_t);
typedef void (*dyn_MEM_free_cb)(void *);
typedef struct st_dynamic_MEM_fns {
dyn_MEM_malloc_cb malloc_cb;
dyn_MEM_realloc_cb realloc_cb;
dyn_MEM_free_cb free_cb;
} dynamic_MEM_fns;
/* FIXME: Perhaps the memory and locking code (crypto.h) should declare and use
* these types so we (and any other dependant code) can simplify a bit?? */
typedef void (*dyn_lock_locking_cb)(int,int,const char *,int);
typedef int (*dyn_lock_add_lock_cb)(int*,int,int,const char *,int);
typedef struct CRYPTO_dynlock_value *(*dyn_dynlock_create_cb)(
const char *,int);
typedef void (*dyn_dynlock_lock_cb)(int,struct CRYPTO_dynlock_value *,
const char *,int);
typedef void (*dyn_dynlock_destroy_cb)(struct CRYPTO_dynlock_value *,
const char *,int);
typedef struct st_dynamic_LOCK_fns {
dyn_lock_locking_cb lock_locking_cb;
dyn_lock_add_lock_cb lock_add_lock_cb;
dyn_dynlock_create_cb dynlock_create_cb;
dyn_dynlock_lock_cb dynlock_lock_cb;
dyn_dynlock_destroy_cb dynlock_destroy_cb;
} dynamic_LOCK_fns;
/* The top-level structure */
typedef struct st_dynamic_fns {
const ERR_FNS *err_fns;
const CRYPTO_EX_DATA_IMPL *ex_data_fns;
dynamic_MEM_fns mem_fns;
dynamic_LOCK_fns lock_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() /
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) /
int bind_engine(ENGINE *e, const char *id, const dynamic_fns *fns) { /
if (ERR_get_implementation() != fns->err_fns) /
{ /
if(!CRYPTO_set_mem_functions(fns->mem_fns.malloc_cb, /
fns->mem_fns.realloc_cb, fns->mem_fns.free_cb)) /
return 0; /
CRYPTO_set_locking_callback(fns->lock_fns.lock_locking_cb); /
CRYPTO_set_add_lock_callback(fns->lock_fns.lock_add_lock_cb); /
CRYPTO_set_dynlock_create_callback(fns->lock_fns.dynlock_create_cb); /
CRYPTO_set_dynlock_lock_callback(fns->lock_fns.dynlock_lock_cb); /
CRYPTO_set_dynlock_destroy_callback(fns->lock_fns.dynlock_destroy_cb); /
if(!CRYPTO_set_ex_data_implementation(fns->ex_data_fns)) /
return 0; /
if(!ERR_set_implementation(fns->err_fns)) return 0; /
} /
if(!fn(e,id)) return 0; /
return 1; }
#if defined(__OpenBSD__) || defined(__FreeBSD__)
void ENGINE_setup_bsd_cryptodev(void);
#endif
/* BEGIN ERROR CODES */
/* The following lines are auto generated by the script mkerr.pl. Any changes
* made after this point may be overwritten when the script is next run.
*/
void ERR_load_ENGINE_strings(void);
/* Error codes for the ENGINE functions. */
/* Function codes. */
#define ENGINE_F_DYNAMIC_CTRL 180
#define ENGINE_F_DYNAMIC_GET_DATA_CTX 181
#define ENGINE_F_DYNAMIC_LOAD 182
#define ENGINE_F_ENGINE_ADD 105
#define ENGINE_F_ENGINE_BY_ID 106
#define ENGINE_F_ENGINE_CMD_IS_EXECUTABLE 170
#define ENGINE_F_ENGINE_CTRL 142
#define ENGINE_F_ENGINE_CTRL_CMD 178
#define ENGINE_F_ENGINE_CTRL_CMD_STRING 171
#define ENGINE_F_ENGINE_FINISH 107
#define ENGINE_F_ENGINE_FREE 108
#define ENGINE_F_ENGINE_GET_CIPHER 185
#define ENGINE_F_ENGINE_GET_DEFAULT_TYPE 177
#define ENGINE_F_ENGINE_GET_DIGEST 186
#define ENGINE_F_ENGINE_GET_NEXT 115
#define ENGINE_F_ENGINE_GET_PREV 116
#define ENGINE_F_ENGINE_INIT 119
#define ENGINE_F_ENGINE_LIST_ADD 120
#define ENGINE_F_ENGINE_LIST_REMOVE 121
#define ENGINE_F_ENGINE_LOAD_PRIVATE_KEY 150
#define ENGINE_F_ENGINE_LOAD_PUBLIC_KEY 151
#define ENGINE_F_ENGINE_MODULE_INIT 187
#define ENGINE_F_ENGINE_NEW 122
#define ENGINE_F_ENGINE_REMOVE 123
#define ENGINE_F_ENGINE_SET_DEFAULT_STRING 189
#define ENGINE_F_ENGINE_SET_DEFAULT_TYPE 126
#define ENGINE_F_ENGINE_SET_ID 129
#define ENGINE_F_ENGINE_SET_NAME 130
#define ENGINE_F_ENGINE_TABLE_REGISTER 184
#define ENGINE_F_ENGINE_UNLOAD_KEY 152
#define ENGINE_F_ENGINE_UP_REF 190
#define ENGINE_F_INT_CTRL_HELPER 172
#define ENGINE_F_INT_ENGINE_CONFIGURE 188
#define ENGINE_F_LOG_MESSAGE 141
#define ENGINE_F_SET_DATA_CTX 183
/* Reason codes. */
#define ENGINE_R_ALREADY_LOADED 100
#define ENGINE_R_ARGUMENT_IS_NOT_A_NUMBER 133
#define ENGINE_R_CMD_NOT_EXECUTABLE 134
#define ENGINE_R_COMMAND_TAKES_INPUT 135
#define ENGINE_R_COMMAND_TAKES_NO_INPUT 136
#define ENGINE_R_CONFLICTING_ENGINE_ID 103
#define ENGINE_R_CTRL_COMMAND_NOT_IMPLEMENTED 119
#define ENGINE_R_DH_NOT_IMPLEMENTED 139
#define ENGINE_R_DSA_NOT_IMPLEMENTED 140
#define ENGINE_R_DSO_FAILURE 104
#define ENGINE_R_DSO_NOT_FOUND 132
#define ENGINE_R_ENGINES_SECTION_ERROR 148
#define ENGINE_R_ENGINE_IS_NOT_IN_LIST 105
#define ENGINE_R_ENGINE_SECTION_ERROR 149
#define ENGINE_R_FAILED_LOADING_PRIVATE_KEY 128
#define ENGINE_R_FAILED_LOADING_PUBLIC_KEY 129
#define ENGINE_R_FINISH_FAILED 106
#define ENGINE_R_GET_HANDLE_FAILED 107
#define ENGINE_R_ID_OR_NAME_MISSING 108
#define ENGINE_R_INIT_FAILED 109
#define ENGINE_R_INTERNAL_LIST_ERROR 110
#define ENGINE_R_INVALID_ARGUMENT 143
#define ENGINE_R_INVALID_CMD_NAME 137
#define ENGINE_R_INVALID_CMD_NUMBER 138
#define ENGINE_R_INVALID_INIT_VALUE 151
#define ENGINE_R_INVALID_STRING 150
#define ENGINE_R_NOT_INITIALISED 117
#define ENGINE_R_NOT_LOADED 112
#define ENGINE_R_NO_CONTROL_FUNCTION 120
#define ENGINE_R_NO_INDEX 144
#define ENGINE_R_NO_LOAD_FUNCTION 125
#define ENGINE_R_NO_REFERENCE 130
#define ENGINE_R_NO_SUCH_ENGINE 116
#define ENGINE_R_NO_UNLOAD_FUNCTION 126
#define ENGINE_R_PROVIDE_PARAMETERS 113
#define ENGINE_R_RSA_NOT_IMPLEMENTED 141
#define ENGINE_R_UNIMPLEMENTED_CIPHER 146
#define ENGINE_R_UNIMPLEMENTED_DIGEST 147
#define ENGINE_R_VERSION_INCOMPATIBILITY 145
#ifdef __cplusplus
}
#endif
#endif