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* Copyright 2000-2016 The OpenSSL Project Authors. 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
/* ====================================================================
* Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
* ECDH support in OpenSSL originally developed by
* SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
# include <openssl/opensslconf.h>
# 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
# 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.
* Returns a positive command number for the first command supported by the
* engine. Returns zero if no ctrl commands are supported.
* 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.
* The 'void*' argument is a command name (cast from 'const char *'), and the
* return value is the command that corresponds to it.
* 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).
/* The next two are similar but give a "short description" of a command. */
* 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.
* 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 */
* 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().
* 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 */
/* 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 **,
const int **, int);
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). */
/* 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() \
# define ENGINE_load_dynamic() \
# define ENGINE_load_padlock() \
# define ENGINE_load_capi() \
# define ENGINE_load_afalg() \
# endif
# define ENGINE_load_cryptodev() \
# define ENGINE_load_rdrand() \
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 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) (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,
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
* 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
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); */
/* 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
typedef unsigned long (*dynamic_v_check_fn) (unsigned long ossl_version);
OPENSSL_EXPORT unsigned long v_check(unsigned long v); \
OPENSSL_EXPORT unsigned long v_check(unsigned long v) { \
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);
int bind_engine(ENGINE *e, const char *id, const dynamic_fns *fns); \
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
int ERR_load_ENGINE_strings(void);
# ifdef __cplusplus
# endif
# endif