Unifdef OPENSSL_NO_ENGINE in engine.h

Also rip out all the gross, useless comments. There's still too much
garbage in here...

ok jsing

1 files changed, 8 insertions, 566 deletions

diff --git a/src/lib/libcrypto/engine/engine.h b/src/lib/libcrypto/engine/engine.h
index 1e04b61e57..bb5112a02b 100644
--- a/src/lib/libcrypto/engine/engine.h
+++ b/src/lib/libcrypto/engine/engine.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: engine.h,v 1.42 2023/08/04 05:44:51 tb Exp $ */
+/* $OpenBSD: engine.h,v 1.43 2023/11/19 15:41:46 tb Exp $ */
 /* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL
  * project 2000.
  */
@@ -89,8 +89,6 @@
 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
@@ -101,145 +99,43 @@ extern "C" {
 #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(). */
-/* #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
-
-/* 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 */
+#define ENGINE_CTRL_HUP                         3
+#define ENGINE_CTRL_SET_USER_INTERFACE          4
+#define ENGINE_CTRL_SET_CALLBACK_DATA           5
+#define ENGINE_CTRL_LOAD_CONFIGURATION          6
+#define ENGINE_CTRL_LOAD_SECTION                7
 
-/* 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
 
 /*
  * Prototypes for the stub functions in engine_stubs.c. They are provided to
- * build M2Crypto, Dovecot, apr-utils without patching. All the other garbage
- * can hopefully go away soon.
+ * build M2Crypto, Dovecot, apr-utils without patching.
  */
-#ifdef OPENSSL_NO_ENGINE
 void ENGINE_load_builtin_engines(void);
 void ENGINE_load_dynamic(void);
 void ENGINE_load_openssl(void);
@@ -261,7 +157,7 @@ int ENGINE_set_default(ENGINE *engine, unsigned int flags);
 ENGINE *ENGINE_get_default_RSA(void);
 int ENGINE_set_default_RSA(ENGINE *engine);
 
-int ENGINE_ctrl_cmd(ENGINE *e, const char *cmd_name, long i, void *p,
+int ENGINE_ctrl_cmd(ENGINE *engine, const char *cmd_name, long i, void *p,
     void (*f)(void), int cmd_optional);
 int ENGINE_ctrl_cmd_string(ENGINE *engine, const char *cmd, const char *arg,
     int cmd_optional);
@@ -270,460 +166,6 @@ EVP_PKEY *ENGINE_load_private_key(ENGINE *engine, const char *key_id,
     UI_METHOD *ui_method, void *callback_data);
 EVP_PKEY *ENGINE_load_public_key(ENGINE *engine, const char *key_id,
     UI_METHOD *ui_method, void *callback_data);
-#else
-/* 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);
-/* Add all the built-in engines. */
-void ENGINE_load_openssl(void);
-void ENGINE_load_dynamic(void);
-#ifndef OPENSSL_NO_STATIC_ENGINE
-void ENGINE_load_padlock(void);
-#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, 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_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_STORE(ENGINE *e);
-void ENGINE_unregister_STORE(ENGINE *e);
-void ENGINE_register_all_STORE(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 *ec_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_STORE(ENGINE *e, const STORE_METHOD *store_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. */
-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);
-void *ENGINE_get_ex_data(const ENGINE *e, int idx);
-
-/* 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 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);
-const STORE_METHOD *ENGINE_get_STORE(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)0x00020000
-/* Binary versions older than this are too old for us (whether we're a loader or
- * a loadee) */
-#define OSSL_DYNAMIC_OLDEST             (unsigned long)0x00020000
-
-/* 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_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 dependent 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 {
-        void                                    *static_state;
-        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() \
-        extern unsigned long v_check(unsigned long v); \
-        extern 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) \
-        extern \
-        int bind_engine(ENGINE *e, const char *id, const dynamic_fns *fns); \
-        extern \
-        int bind_engine(ENGINE *e, const char *id, const dynamic_fns *fns) { \
-                if(ENGINE_get_static_state() == fns->static_state) goto skip_cbs; \
-                if(!CRYPTO_set_mem_functions(fns->mem_fns.malloc_cb, \
-                        fns->mem_fns.realloc_cb, fns->mem_fns.free_cb)) \
-                        return 0; \
-                if(!CRYPTO_set_ex_data_implementation(fns->ex_data_fns)) \
-                        return 0; \
-                if(!ERR_set_implementation(fns->err_fns)) return 0; \
-        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);
-
-void ERR_load_ENGINE_strings(void);
-#endif
 
 /* Error codes for the ENGINE functions. */