diff options
Diffstat (limited to 'include/openssl/engine.h')
| -rw-r--r-- | include/openssl/engine.h | 832 |
1 files changed, 832 insertions, 0 deletions
diff --git a/include/openssl/engine.h b/include/openssl/engine.h new file mode 100644 index 00000000..25c3cf7c --- /dev/null +++ b/include/openssl/engine.h @@ -0,0 +1,832 @@ +/* + * Copyright 2000-2020 The OpenSSL Project Authors. All Rights Reserved. + * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved + * + * Licensed under the Apache License 2.0 (the "License"). You may not use + * this file except in compliance with the License. You can obtain a copy + * in the file LICENSE in the source distribution or at + * https://www.openssl.org/source/license.html + */ + +#ifndef OPENSSL_ENGINE_H +# define OPENSSL_ENGINE_H +# pragma once + +# include <openssl/macros.h> +# ifndef OPENSSL_NO_DEPRECATED_3_0 +# define HEADER_ENGINE_H +# endif + +# include <openssl/opensslconf.h> + +# ifndef OPENSSL_NO_ENGINE +# ifndef OPENSSL_NO_DEPRECATED_1_1_0 +# 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/types.h> +# include <openssl/symhacks.h> +# include <openssl/x509.h> +# include <openssl/engineerr.h> +# ifdef __cplusplus +extern "C" { +# endif + +/* + * These flags are used to control combinations of algorithm (methods) by + * bitwise "OR"ing. + */ +# define ENGINE_METHOD_RSA (unsigned int)0x0001 +# define ENGINE_METHOD_DSA (unsigned int)0x0002 +# define ENGINE_METHOD_DH (unsigned int)0x0004 +# define ENGINE_METHOD_RAND (unsigned int)0x0008 +# define ENGINE_METHOD_CIPHERS (unsigned int)0x0040 +# define ENGINE_METHOD_DIGESTS (unsigned int)0x0080 +# define ENGINE_METHOD_PKEY_METHS (unsigned int)0x0200 +# define ENGINE_METHOD_PKEY_ASN1_METHS (unsigned int)0x0400 +# define ENGINE_METHOD_EC (unsigned int)0x0800 +/* Obvious all-or-nothing cases. */ +# define ENGINE_METHOD_ALL (unsigned int)0xFFFF +# define ENGINE_METHOD_NONE (unsigned int)0x0000 + +/* + * This(ese) flag(s) controls behaviour of the ENGINE_TABLE mechanism used + * internally to control registration of ENGINE implementations, and can be + * set by ENGINE_set_table_flags(). The "NOINIT" flag prevents attempts to + * initialise registered ENGINEs if they are not already initialised. + */ +# define ENGINE_TABLE_FLAG_NOINIT (unsigned int)0x0001 + +/* ENGINE flags that can be set by ENGINE_set_flags(). */ +/* Not used */ +/* #define ENGINE_FLAGS_MALLOCED 0x0001 */ + +/* + * This flag is for ENGINEs that wish to handle the various 'CMD'-related + * control commands on their own. Without this flag, ENGINE_ctrl() handles + * these control commands on behalf of the ENGINE using their "cmd_defns" + * data. + */ +# define ENGINE_FLAGS_MANUAL_CMD_CTRL (int)0x0002 + +/* + * This flag is for ENGINEs who return new duplicate structures when found + * via "ENGINE_by_id()". When an ENGINE must store state (eg. if + * ENGINE_ctrl() commands are called in sequence as part of some stateful + * process like key-generation setup and execution), it can set this flag - + * then each attempt to obtain the ENGINE will result in it being copied into + * a new structure. Normally, ENGINEs don't declare this flag so + * ENGINE_by_id() just increments the existing ENGINE's structural reference + * count. + */ +# define ENGINE_FLAGS_BY_ID_COPY (int)0x0004 + +/* + * This flag if for an ENGINE that does not want its methods registered as + * part of ENGINE_register_all_complete() for example if the methods are not + * usable as default methods. + */ + +# define ENGINE_FLAGS_NO_REGISTER_ALL (int)0x0008 + +/* + * ENGINEs can support their own command types, and these flags are used in + * ENGINE_CTRL_GET_CMD_FLAGS to indicate to the caller what kind of input + * each command expects. Currently only numeric and string input is + * supported. If a control command supports none of the _NUMERIC, _STRING, or + * _NO_INPUT options, then it is regarded as an "internal" control command - + * and not for use in config setting situations. As such, they're not + * available to the ENGINE_ctrl_cmd_string() function, only raw ENGINE_ctrl() + * access. Changes to this list of 'command types' should be reflected + * carefully in ENGINE_cmd_is_executable() and ENGINE_ctrl_cmd_string(). + */ + +/* accepts a 'long' input value (3rd parameter to ENGINE_ctrl) */ +# define ENGINE_CMD_FLAG_NUMERIC (unsigned int)0x0001 +/* + * accepts string input (cast from 'void*' to 'const char *', 4th parameter + * to ENGINE_ctrl) + */ +# define ENGINE_CMD_FLAG_STRING (unsigned int)0x0002 +/* + * Indicates that the control command takes *no* input. Ie. the control + * command is unparameterised. + */ +# define ENGINE_CMD_FLAG_NO_INPUT (unsigned int)0x0004 +/* + * Indicates that the control command is internal. This control command won't + * be shown in any output, and is only usable through the ENGINE_ctrl_cmd() + * function. + */ +# define ENGINE_CMD_FLAG_INTERNAL (unsigned int)0x0008 + +/* + * NB: These 3 control commands are deprecated and should not be used. + * ENGINEs relying on these commands should compile conditional support for + * compatibility (eg. if these symbols are defined) but should also migrate + * the same functionality to their own ENGINE-specific control functions that + * can be "discovered" by calling applications. The fact these control + * commands wouldn't be "executable" (ie. usable by text-based config) + * doesn't change the fact that application code can find and use them + * without requiring per-ENGINE hacking. + */ + +/* + * These flags are used to tell the ctrl function what should be done. All + * command numbers are shared between all engines, even if some don't make + * sense to some engines. In such a case, they do nothing but return the + * error ENGINE_R_CTRL_COMMAND_NOT_IMPLEMENTED. + */ +# define ENGINE_CTRL_SET_LOGSTREAM 1 +# define ENGINE_CTRL_SET_PASSWORD_CALLBACK 2 +# define ENGINE_CTRL_HUP 3/* Close and reinitialise + * any handles/connections + * etc. */ +# define ENGINE_CTRL_SET_USER_INTERFACE 4/* Alternative to callback */ +# define ENGINE_CTRL_SET_CALLBACK_DATA 5/* User-specific data, used + * when calling the password + * callback and the user + * interface */ +# define ENGINE_CTRL_LOAD_CONFIGURATION 6/* Load a configuration, + * given a string that + * represents a file name + * or so */ +# define ENGINE_CTRL_LOAD_SECTION 7/* Load data from a given + * section in the already + * loaded configuration */ + +/* + * These control commands allow an application to deal with an arbitrary + * engine in a dynamic way. Warn: Negative return values indicate errors FOR + * THESE COMMANDS because zero is used to indicate 'end-of-list'. Other + * commands, including ENGINE-specific command types, return zero for an + * error. An ENGINE can choose to implement these ctrl functions, and can + * internally manage things however it chooses - it does so by setting the + * ENGINE_FLAGS_MANUAL_CMD_CTRL flag (using ENGINE_set_flags()). Otherwise + * the ENGINE_ctrl() code handles this on the ENGINE's behalf using the + * cmd_defns data (set using ENGINE_set_cmd_defns()). This means an ENGINE's + * ctrl() handler need only implement its own commands - the above "meta" + * commands will be taken care of. + */ + +/* + * Returns non-zero if the supplied ENGINE has a ctrl() handler. If "not", + * then all the remaining control commands will return failure, so it is + * worth checking this first if the caller is trying to "discover" the + * engine's capabilities and doesn't want errors generated unnecessarily. + */ +# define ENGINE_CTRL_HAS_CTRL_FUNCTION 10 +/* + * Returns a positive command number for the first command supported by the + * engine. Returns zero if no ctrl commands are supported. + */ +# define ENGINE_CTRL_GET_FIRST_CMD_TYPE 11 +/* + * The 'long' argument specifies a command implemented by the engine, and the + * return value is the next command supported, or zero if there are no more. + */ +# define ENGINE_CTRL_GET_NEXT_CMD_TYPE 12 +/* + * The 'void*' argument is a command name (cast from 'const char *'), and the + * return value is the command that corresponds to it. + */ +# define ENGINE_CTRL_GET_CMD_FROM_NAME 13 +/* + * The next two allow a command to be converted into its corresponding string + * form. In each case, the 'long' argument supplies the command. In the + * NAME_LEN case, the return value is the length of the command name (not + * counting a trailing EOL). In the NAME case, the 'void*' argument must be a + * string buffer large enough, and it will be populated with the name of the + * command (WITH a trailing EOL). + */ +# define ENGINE_CTRL_GET_NAME_LEN_FROM_CMD 14 +# define ENGINE_CTRL_GET_NAME_FROM_CMD 15 +/* The next two are similar but give a "short description" of a command. */ +# define ENGINE_CTRL_GET_DESC_LEN_FROM_CMD 16 +# define ENGINE_CTRL_GET_DESC_FROM_CMD 17 +/* + * With this command, the return value is the OR'd combination of + * ENGINE_CMD_FLAG_*** values that indicate what kind of input a given + * engine-specific ctrl command expects. + */ +# define ENGINE_CTRL_GET_CMD_FLAGS 18 + +/* + * ENGINE implementations should start the numbering of their own control + * commands from this value. (ie. ENGINE_CMD_BASE, ENGINE_CMD_BASE + 1, etc). + */ +# define ENGINE_CMD_BASE 200 + +/* + * NB: These 2 nCipher "chil" control commands are deprecated, and their + * functionality is now available through ENGINE-specific control commands + * (exposed through the above-mentioned 'CMD'-handling). Code using these 2 + * commands should be migrated to the more general command handling before + * these are removed. + */ + +/* Flags specific to the nCipher "chil" engine */ +# define ENGINE_CTRL_CHIL_SET_FORKCHECK 100 + /* + * Depending on the value of the (long)i argument, this sets or + * unsets the SimpleForkCheck flag in the CHIL API to enable or + * disable checking and workarounds for applications that fork(). + */ +# define ENGINE_CTRL_CHIL_NO_LOCKING 101 + /* + * This prevents the initialisation function from providing mutex + * callbacks to the nCipher library. + */ + +/* + * If an ENGINE supports its own specific control commands and wishes the + * framework to handle the above 'ENGINE_CMD_***'-manipulation commands on + * its behalf, it should supply a null-terminated array of ENGINE_CMD_DEFN + * entries to ENGINE_set_cmd_defns(). It should also implement a ctrl() + * handler that supports the stated commands (ie. the "cmd_num" entries as + * described by the array). NB: The array must be ordered in increasing order + * of cmd_num. "null-terminated" means that the last ENGINE_CMD_DEFN element + * has cmd_num set to zero and/or cmd_name set to NULL. + */ +typedef struct ENGINE_CMD_DEFN_st { + unsigned int cmd_num; /* The command number */ + const char *cmd_name; /* The command name itself */ + const char *cmd_desc; /* A short description of the command */ + unsigned int cmd_flags; /* The input the command expects */ +} ENGINE_CMD_DEFN; + +/* Generic function pointer */ +typedef int (*ENGINE_GEN_FUNC_PTR) (void); +/* Generic function pointer taking no arguments */ +typedef int (*ENGINE_GEN_INT_FUNC_PTR) (ENGINE *); +/* Specific control function pointer */ +typedef int (*ENGINE_CTRL_FUNC_PTR) (ENGINE *, int, long, void *, + void (*f) (void)); +/* Generic load_key function pointer */ +typedef EVP_PKEY *(*ENGINE_LOAD_KEY_PTR)(ENGINE *, const char *, + UI_METHOD *ui_method, + void *callback_data); +typedef int (*ENGINE_SSL_CLIENT_CERT_PTR) (ENGINE *, SSL *ssl, + STACK_OF(X509_NAME) *ca_dn, + X509 **pcert, EVP_PKEY **pkey, + STACK_OF(X509) **pother, + UI_METHOD *ui_method, + void *callback_data); +/*- + * These callback types are for an ENGINE's handler for cipher and digest logic. + * These handlers have these prototypes; + * int foo(ENGINE *e, const EVP_CIPHER **cipher, const int **nids, int nid); + * int foo(ENGINE *e, const EVP_MD **digest, const int **nids, int nid); + * Looking at how to implement these handlers in the case of cipher support, if + * the framework wants the EVP_CIPHER for 'nid', it will call; + * foo(e, &p_evp_cipher, NULL, nid); (return zero for failure) + * If the framework wants a list of supported 'nid's, it will call; + * foo(e, NULL, &p_nids, 0); (returns number of 'nids' or -1 for error) + */ +/* + * Returns to a pointer to the array of supported cipher 'nid's. If the + * second parameter is non-NULL it is set to the size of the returned array. + */ +typedef int (*ENGINE_CIPHERS_PTR) (ENGINE *, const EVP_CIPHER **, + const int **, int); +typedef int (*ENGINE_DIGESTS_PTR) (ENGINE *, const EVP_MD **, const int **, + int); +typedef int (*ENGINE_PKEY_METHS_PTR) (ENGINE *, EVP_PKEY_METHOD **, + const int **, int); +typedef int (*ENGINE_PKEY_ASN1_METHS_PTR) (ENGINE *, EVP_PKEY_ASN1_METHOD **, + const int **, int); +/* + * STRUCTURE functions ... all of these functions deal with pointers to + * ENGINE structures where the pointers have a "structural reference". This + * means that their reference is to allowed access to the structure but it + * does not imply that the structure is functional. To simply increment or + * decrement the structural reference count, use ENGINE_by_id and + * ENGINE_free. NB: This is not required when iterating using ENGINE_get_next + * as it will automatically decrement the structural reference count of the + * "current" ENGINE and increment the structural reference count of the + * ENGINE it returns (unless it is NULL). + */ + +/* Get the first/last "ENGINE" type available. */ +# ifndef OPENSSL_NO_DEPRECATED_3_0 +OSSL_DEPRECATEDIN_3_0 ENGINE *ENGINE_get_first(void); +OSSL_DEPRECATEDIN_3_0 ENGINE *ENGINE_get_last(void); +# endif +/* Iterate to the next/previous "ENGINE" type (NULL = end of the list). */ +# ifndef OPENSSL_NO_DEPRECATED_3_0 +OSSL_DEPRECATEDIN_3_0 ENGINE *ENGINE_get_next(ENGINE *e); +OSSL_DEPRECATEDIN_3_0 ENGINE *ENGINE_get_prev(ENGINE *e); +# endif +/* Add another "ENGINE" type into the array. */ +# ifndef OPENSSL_NO_DEPRECATED_3_0 +OSSL_DEPRECATEDIN_3_0 int ENGINE_add(ENGINE *e); +# endif +/* Remove an existing "ENGINE" type from the array. */ +# ifndef OPENSSL_NO_DEPRECATED_3_0 +OSSL_DEPRECATEDIN_3_0 int ENGINE_remove(ENGINE *e); +# endif +/* Retrieve an engine from the list by its unique "id" value. */ +# ifndef OPENSSL_NO_DEPRECATED_3_0 +OSSL_DEPRECATEDIN_3_0 ENGINE *ENGINE_by_id(const char *id); +# endif + +# ifndef OPENSSL_NO_DEPRECATED_1_1_0 +# define ENGINE_load_openssl() \ + OPENSSL_init_crypto(OPENSSL_INIT_ENGINE_OPENSSL, NULL) +# define ENGINE_load_dynamic() \ + OPENSSL_init_crypto(OPENSSL_INIT_ENGINE_DYNAMIC, NULL) +# ifndef OPENSSL_NO_STATIC_ENGINE +# define ENGINE_load_padlock() \ + OPENSSL_init_crypto(OPENSSL_INIT_ENGINE_PADLOCK, NULL) +# define ENGINE_load_capi() \ + OPENSSL_init_crypto(OPENSSL_INIT_ENGINE_CAPI, NULL) +# define ENGINE_load_afalg() \ + OPENSSL_init_crypto(OPENSSL_INIT_ENGINE_AFALG, NULL) +# endif +# define ENGINE_load_cryptodev() \ + OPENSSL_init_crypto(OPENSSL_INIT_ENGINE_CRYPTODEV, NULL) +# define ENGINE_load_rdrand() \ + OPENSSL_init_crypto(OPENSSL_INIT_ENGINE_RDRAND, NULL) +# endif +# ifndef OPENSSL_NO_DEPRECATED_3_0 +OSSL_DEPRECATEDIN_3_0 void ENGINE_load_builtin_engines(void); +# endif + +/* + * Get and set global flags (ENGINE_TABLE_FLAG_***) for the implementation + * "registry" handling. + */ +# ifndef OPENSSL_NO_DEPRECATED_3_0 +OSSL_DEPRECATEDIN_3_0 unsigned int ENGINE_get_table_flags(void); +OSSL_DEPRECATEDIN_3_0 void ENGINE_set_table_flags(unsigned int flags); +# endif + +/*- 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. + */ +# ifndef OPENSSL_NO_DEPRECATED_3_0 +OSSL_DEPRECATEDIN_3_0 int ENGINE_register_RSA(ENGINE *e); +OSSL_DEPRECATEDIN_3_0 void ENGINE_unregister_RSA(ENGINE *e); +OSSL_DEPRECATEDIN_3_0 void ENGINE_register_all_RSA(void); +OSSL_DEPRECATEDIN_3_0 int ENGINE_register_DSA(ENGINE *e); +OSSL_DEPRECATEDIN_3_0 void ENGINE_unregister_DSA(ENGINE *e); +OSSL_DEPRECATEDIN_3_0 void ENGINE_register_all_DSA(void); +OSSL_DEPRECATEDIN_3_0 int ENGINE_register_EC(ENGINE *e); +OSSL_DEPRECATEDIN_3_0 void ENGINE_unregister_EC(ENGINE *e); +OSSL_DEPRECATEDIN_3_0 void ENGINE_register_all_EC(void); +OSSL_DEPRECATEDIN_3_0 int ENGINE_register_DH(ENGINE *e); +OSSL_DEPRECATEDIN_3_0 void ENGINE_unregister_DH(ENGINE *e); +OSSL_DEPRECATEDIN_3_0 void ENGINE_register_all_DH(void); +OSSL_DEPRECATEDIN_3_0 int ENGINE_register_RAND(ENGINE *e); +OSSL_DEPRECATEDIN_3_0 void ENGINE_unregister_RAND(ENGINE *e); +OSSL_DEPRECATEDIN_3_0 void ENGINE_register_all_RAND(void); +OSSL_DEPRECATEDIN_3_0 int ENGINE_register_ciphers(ENGINE *e); +OSSL_DEPRECATEDIN_3_0 void ENGINE_unregister_ciphers(ENGINE *e); +OSSL_DEPRECATEDIN_3_0 void ENGINE_register_all_ciphers(void); +OSSL_DEPRECATEDIN_3_0 int ENGINE_register_digests(ENGINE *e); +OSSL_DEPRECATEDIN_3_0 void ENGINE_unregister_digests(ENGINE *e); +OSSL_DEPRECATEDIN_3_0 void ENGINE_register_all_digests(void); +OSSL_DEPRECATEDIN_3_0 int ENGINE_register_pkey_meths(ENGINE *e); +OSSL_DEPRECATEDIN_3_0 void ENGINE_unregister_pkey_meths(ENGINE *e); +OSSL_DEPRECATEDIN_3_0 void ENGINE_register_all_pkey_meths(void); +OSSL_DEPRECATEDIN_3_0 int ENGINE_register_pkey_asn1_meths(ENGINE *e); +OSSL_DEPRECATEDIN_3_0 void ENGINE_unregister_pkey_asn1_meths(ENGINE *e); +OSSL_DEPRECATEDIN_3_0 void ENGINE_register_all_pkey_asn1_meths(void); +# endif + +/* + * 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. + */ +# ifndef OPENSSL_NO_DEPRECATED_3_0 +OSSL_DEPRECATEDIN_3_0 int ENGINE_register_complete(ENGINE *e); +OSSL_DEPRECATEDIN_3_0 int ENGINE_register_all_complete(void); +# endif + +/* + * Send parameterised control commands to the engine. The possibilities to + * send down an integer, a pointer to data or a function pointer are + * provided. Any of the parameters may or may not be NULL, depending on the + * command number. In actuality, this function only requires a structural + * (rather than functional) reference to an engine, but many control commands + * may require the engine be functional. The caller should be aware of trying + * commands that require an operational ENGINE, and only use functional + * references in such situations. + */ +# ifndef OPENSSL_NO_DEPRECATED_3_0 +OSSL_DEPRECATEDIN_3_0 int ENGINE_ctrl(ENGINE *e, int cmd, long i, void *p, + void (*f) (void)); +# endif + +/* + * 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(). + */ +# ifndef OPENSSL_NO_DEPRECATED_3_0 +OSSL_DEPRECATEDIN_3_0 int ENGINE_cmd_is_executable(ENGINE *e, int cmd); +# endif + +/* + * 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. + */ +# ifndef OPENSSL_NO_DEPRECATED_3_0 +OSSL_DEPRECATEDIN_3_0 int ENGINE_ctrl_cmd(ENGINE *e, const char *cmd_name, + long i, void *p, void (*f) (void), + int cmd_optional); +# endif + +/* + * 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. + */ +# ifndef OPENSSL_NO_DEPRECATED_3_0 +OSSL_DEPRECATEDIN_3_0 +int ENGINE_ctrl_cmd_string(ENGINE *e, const char *cmd_name, const char *arg, + int cmd_optional); +# endif + +/* + * 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! + */ +# ifndef OPENSSL_NO_DEPRECATED_3_0 +OSSL_DEPRECATEDIN_3_0 ENGINE *ENGINE_new(void); +OSSL_DEPRECATEDIN_3_0 int ENGINE_free(ENGINE *e); +OSSL_DEPRECATEDIN_3_0 int ENGINE_up_ref(ENGINE *e); +OSSL_DEPRECATEDIN_3_0 int ENGINE_set_id(ENGINE *e, const char *id); +OSSL_DEPRECATEDIN_3_0 int ENGINE_set_name(ENGINE *e, const char *name); +OSSL_DEPRECATEDIN_3_0 int ENGINE_set_RSA(ENGINE *e, const RSA_METHOD *rsa_meth); +OSSL_DEPRECATEDIN_3_0 int ENGINE_set_DSA(ENGINE *e, const DSA_METHOD *dsa_meth); +OSSL_DEPRECATEDIN_3_0 int ENGINE_set_EC(ENGINE *e, const EC_KEY_METHOD *ecdsa_meth); +OSSL_DEPRECATEDIN_3_0 int ENGINE_set_DH(ENGINE *e, const DH_METHOD *dh_meth); +OSSL_DEPRECATEDIN_3_0 int ENGINE_set_RAND(ENGINE *e, const RAND_METHOD *rand_meth); +OSSL_DEPRECATEDIN_3_0 +int ENGINE_set_destroy_function(ENGINE *e,ENGINE_GEN_INT_FUNC_PTR destroy_f); +OSSL_DEPRECATEDIN_3_0 +int ENGINE_set_init_function(ENGINE *e, ENGINE_GEN_INT_FUNC_PTR init_f); +OSSL_DEPRECATEDIN_3_0 +int ENGINE_set_finish_function(ENGINE *e, ENGINE_GEN_INT_FUNC_PTR finish_f); +OSSL_DEPRECATEDIN_3_0 +int ENGINE_set_ctrl_function(ENGINE *e, ENGINE_CTRL_FUNC_PTR ctrl_f); +OSSL_DEPRECATEDIN_3_0 +int ENGINE_set_load_privkey_function(ENGINE *e, ENGINE_LOAD_KEY_PTR loadpriv_f); +OSSL_DEPRECATEDIN_3_0 +int ENGINE_set_load_pubkey_function(ENGINE *e, ENGINE_LOAD_KEY_PTR loadpub_f); +OSSL_DEPRECATEDIN_3_0 +int ENGINE_set_load_ssl_client_cert_function(ENGINE *e, + ENGINE_SSL_CLIENT_CERT_PTR loadssl_f); +OSSL_DEPRECATEDIN_3_0 +int ENGINE_set_ciphers(ENGINE *e, ENGINE_CIPHERS_PTR f); +OSSL_DEPRECATEDIN_3_0 +int ENGINE_set_digests(ENGINE *e, ENGINE_DIGESTS_PTR f); +OSSL_DEPRECATEDIN_3_0 +int ENGINE_set_pkey_meths(ENGINE *e, ENGINE_PKEY_METHS_PTR f); +OSSL_DEPRECATEDIN_3_0 +int ENGINE_set_pkey_asn1_meths(ENGINE *e, ENGINE_PKEY_ASN1_METHS_PTR f); +OSSL_DEPRECATEDIN_3_0 int ENGINE_set_flags(ENGINE *e, int flags); +OSSL_DEPRECATEDIN_3_0 int ENGINE_set_cmd_defns(ENGINE *e, + const ENGINE_CMD_DEFN *defns); +# endif +/* 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) +# ifndef OPENSSL_NO_DEPRECATED_3_0 +OSSL_DEPRECATEDIN_3_0 int ENGINE_set_ex_data(ENGINE *e, int idx, void *arg); +OSSL_DEPRECATEDIN_3_0 void *ENGINE_get_ex_data(const ENGINE *e, int idx); +# endif + +# ifndef OPENSSL_NO_DEPRECATED_1_1_0 +/* + * This function previously cleaned up anything that needs it. Auto-deinit will + * now take care of it so it is no longer required to call this function. + */ +# define ENGINE_cleanup() while(0) continue +# endif + +/* + * These return values from within the ENGINE structure. These can be useful + * with functional references as well as structural references - it depends + * which you obtained. Using the result for functional purposes if you only + * obtained a structural reference may be problematic! + */ +# ifndef OPENSSL_NO_DEPRECATED_3_0 +OSSL_DEPRECATEDIN_3_0 const char *ENGINE_get_id(const ENGINE *e); +OSSL_DEPRECATEDIN_3_0 const char *ENGINE_get_name(const ENGINE *e); +OSSL_DEPRECATEDIN_3_0 const RSA_METHOD *ENGINE_get_RSA(const ENGINE *e); +OSSL_DEPRECATEDIN_3_0 const DSA_METHOD *ENGINE_get_DSA(const ENGINE *e); +OSSL_DEPRECATEDIN_3_0 const EC_KEY_METHOD *ENGINE_get_EC(const ENGINE *e); +OSSL_DEPRECATEDIN_3_0 const DH_METHOD *ENGINE_get_DH(const ENGINE *e); +OSSL_DEPRECATEDIN_3_0 const RAND_METHOD *ENGINE_get_RAND(const ENGINE *e); +OSSL_DEPRECATEDIN_3_0 +ENGINE_GEN_INT_FUNC_PTR ENGINE_get_destroy_function(const ENGINE *e); +OSSL_DEPRECATEDIN_3_0 +ENGINE_GEN_INT_FUNC_PTR ENGINE_get_init_function(const ENGINE *e); +OSSL_DEPRECATEDIN_3_0 +ENGINE_GEN_INT_FUNC_PTR ENGINE_get_finish_function(const ENGINE *e); +OSSL_DEPRECATEDIN_3_0 +ENGINE_CTRL_FUNC_PTR ENGINE_get_ctrl_function(const ENGINE *e); +OSSL_DEPRECATEDIN_3_0 +ENGINE_LOAD_KEY_PTR ENGINE_get_load_privkey_function(const ENGINE *e); +OSSL_DEPRECATEDIN_3_0 +ENGINE_LOAD_KEY_PTR ENGINE_get_load_pubkey_function(const ENGINE *e); +OSSL_DEPRECATEDIN_3_0 +ENGINE_SSL_CLIENT_CERT_PTR ENGINE_get_ssl_client_cert_function(const ENGINE *e); +OSSL_DEPRECATEDIN_3_0 +ENGINE_CIPHERS_PTR ENGINE_get_ciphers(const ENGINE *e); +OSSL_DEPRECATEDIN_3_0 +ENGINE_DIGESTS_PTR ENGINE_get_digests(const ENGINE *e); +OSSL_DEPRECATEDIN_3_0 +ENGINE_PKEY_METHS_PTR ENGINE_get_pkey_meths(const ENGINE *e); +OSSL_DEPRECATEDIN_3_0 +ENGINE_PKEY_ASN1_METHS_PTR ENGINE_get_pkey_asn1_meths(const ENGINE *e); +OSSL_DEPRECATEDIN_3_0 +const EVP_CIPHER *ENGINE_get_cipher(ENGINE *e, int nid); +OSSL_DEPRECATEDIN_3_0 +const EVP_MD *ENGINE_get_digest(ENGINE *e, int nid); +OSSL_DEPRECATEDIN_3_0 +const EVP_PKEY_METHOD *ENGINE_get_pkey_meth(ENGINE *e, int nid); +OSSL_DEPRECATEDIN_3_0 +const EVP_PKEY_ASN1_METHOD *ENGINE_get_pkey_asn1_meth(ENGINE *e, int nid); +OSSL_DEPRECATEDIN_3_0 +const EVP_PKEY_ASN1_METHOD *ENGINE_get_pkey_asn1_meth_str(ENGINE *e, + const char *str, + int len); +OSSL_DEPRECATEDIN_3_0 +const EVP_PKEY_ASN1_METHOD *ENGINE_pkey_asn1_find_str(ENGINE **pe, + const char *str, int len); +OSSL_DEPRECATEDIN_3_0 +const ENGINE_CMD_DEFN *ENGINE_get_cmd_defns(const ENGINE *e); +OSSL_DEPRECATEDIN_3_0 int ENGINE_get_flags(const ENGINE *e); +# endif + +/* + * 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. + */ +# ifndef OPENSSL_NO_DEPRECATED_3_0 +OSSL_DEPRECATEDIN_3_0 int ENGINE_init(ENGINE *e); +# endif +/* + * 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. + */ +# ifndef OPENSSL_NO_DEPRECATED_3_0 +OSSL_DEPRECATEDIN_3_0 int ENGINE_finish(ENGINE *e); +# endif + +/* + * 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. + */ +# ifndef OPENSSL_NO_DEPRECATED_3_0 +OSSL_DEPRECATEDIN_3_0 +EVP_PKEY *ENGINE_load_private_key(ENGINE *e, const char *key_id, + UI_METHOD *ui_method, void *callback_data); +OSSL_DEPRECATEDIN_3_0 +EVP_PKEY *ENGINE_load_public_key(ENGINE *e, const char *key_id, + UI_METHOD *ui_method, void *callback_data); +OSSL_DEPRECATEDIN_3_0 +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); +# endif + +/* + * 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. + */ +# ifndef OPENSSL_NO_DEPRECATED_3_0 +OSSL_DEPRECATEDIN_3_0 ENGINE *ENGINE_get_default_RSA(void); +# endif +/* Same for the other "methods" */ +# ifndef OPENSSL_NO_DEPRECATED_3_0 +OSSL_DEPRECATEDIN_3_0 ENGINE *ENGINE_get_default_DSA(void); +OSSL_DEPRECATEDIN_3_0 ENGINE *ENGINE_get_default_EC(void); +OSSL_DEPRECATEDIN_3_0 ENGINE *ENGINE_get_default_DH(void); +OSSL_DEPRECATEDIN_3_0 ENGINE *ENGINE_get_default_RAND(void); +# endif +/* + * These functions can be used to get a functional reference to perform + * ciphering or digesting corresponding to "nid". + */ +# ifndef OPENSSL_NO_DEPRECATED_3_0 +OSSL_DEPRECATEDIN_3_0 ENGINE *ENGINE_get_cipher_engine(int nid); +OSSL_DEPRECATEDIN_3_0 ENGINE *ENGINE_get_digest_engine(int nid); +OSSL_DEPRECATEDIN_3_0 ENGINE *ENGINE_get_pkey_meth_engine(int nid); +OSSL_DEPRECATEDIN_3_0 ENGINE *ENGINE_get_pkey_asn1_meth_engine(int nid); +# endif + +/* + * 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'. + */ +# ifndef OPENSSL_NO_DEPRECATED_3_0 +OSSL_DEPRECATEDIN_3_0 int ENGINE_set_default_RSA(ENGINE *e); +OSSL_DEPRECATEDIN_3_0 int ENGINE_set_default_string(ENGINE *e, + const char *def_list); +# endif +/* Same for the other "methods" */ +# ifndef OPENSSL_NO_DEPRECATED_3_0 +OSSL_DEPRECATEDIN_3_0 int ENGINE_set_default_DSA(ENGINE *e); +OSSL_DEPRECATEDIN_3_0 int ENGINE_set_default_EC(ENGINE *e); +OSSL_DEPRECATEDIN_3_0 int ENGINE_set_default_DH(ENGINE *e); +OSSL_DEPRECATEDIN_3_0 int ENGINE_set_default_RAND(ENGINE *e); +OSSL_DEPRECATEDIN_3_0 int ENGINE_set_default_ciphers(ENGINE *e); +OSSL_DEPRECATEDIN_3_0 int ENGINE_set_default_digests(ENGINE *e); +OSSL_DEPRECATEDIN_3_0 int ENGINE_set_default_pkey_meths(ENGINE *e); +OSSL_DEPRECATEDIN_3_0 int ENGINE_set_default_pkey_asn1_meths(ENGINE *e); +# endif + +/* + * 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. + */ +# ifndef OPENSSL_NO_DEPRECATED_3_0 +OSSL_DEPRECATEDIN_3_0 int ENGINE_set_default(ENGINE *e, unsigned int flags); +OSSL_DEPRECATEDIN_3_0 void ENGINE_add_conf_module(void); +# endif + +/* Deprecated functions ... */ +/* int ENGINE_clear_defaults(void); */ + +/**************************/ +/* DYNAMIC ENGINE SUPPORT */ +/**************************/ + +/* Binary/behaviour compatibility levels */ +# define OSSL_DYNAMIC_VERSION (unsigned long)0x00030000 +/* + * Binary versions older than this are too old for us (whether we're a loader + * or a loadee) + */ +# define OSSL_DYNAMIC_OLDEST (unsigned long)0x00030000 + +/* + * When compiling an ENGINE entirely as an external shared library, loadable + * by the "dynamic" ENGINE, these types are needed. The 'dynamic_fns' + * structure type provides the calling application's (or library's) error + * functionality and memory management function pointers to the loaded + * library. These should be used/set in the loaded library code so that the + * loading application's 'state' will be used/changed in all operations. The + * 'static_state' pointer allows the loaded library to know if it shares the + * same static data as the calling application (or library), and thus whether + * these callbacks need to be set or not. + */ +typedef void *(*dyn_MEM_malloc_fn) (size_t, const char *, int); +typedef void *(*dyn_MEM_realloc_fn) (void *, size_t, const char *, int); +typedef void (*dyn_MEM_free_fn) (void *, const char *, int); +typedef struct st_dynamic_MEM_fns { + dyn_MEM_malloc_fn malloc_fn; + dyn_MEM_realloc_fn realloc_fn; + dyn_MEM_free_fn free_fn; +} dynamic_MEM_fns; +/* + * FIXME: Perhaps the memory and locking code (crypto.h) should declare and + * use these types so we (and any other dependent code) can simplify a bit?? + */ +/* The top-level structure */ +typedef struct st_dynamic_fns { + void *static_state; + dynamic_MEM_fns mem_fns; +} dynamic_fns; + +/* + * The version checking function should be of this prototype. NB: The + * ossl_version value passed in is the OSSL_DYNAMIC_VERSION of the loading + * code. If this function returns zero, it indicates a (potential) version + * incompatibility and the loaded library doesn't believe it can proceed. + * Otherwise, the returned value is the (latest) version supported by the + * loading library. The loader may still decide that the loaded code's + * version is unsatisfactory and could veto the load. The function is + * expected to be implemented with the symbol name "v_check", and a default + * implementation can be fully instantiated with + * IMPLEMENT_DYNAMIC_CHECK_FN(). + */ +typedef unsigned long (*dynamic_v_check_fn) (unsigned long ossl_version); +# define IMPLEMENT_DYNAMIC_CHECK_FN() \ + OPENSSL_EXPORT unsigned long v_check(unsigned long v); \ + OPENSSL_EXPORT unsigned long v_check(unsigned long v) { \ + if (v >= OSSL_DYNAMIC_OLDEST) return OSSL_DYNAMIC_VERSION; \ + return 0; } + +/* + * This function is passed the ENGINE structure to initialise with its own + * function and command settings. It should not adjust the structural or + * functional reference counts. If this function returns zero, (a) the load + * will be aborted, (b) the previous ENGINE state will be memcpy'd back onto + * the structure, and (c) the shared library will be unloaded. So + * implementations should do their own internal cleanup in failure + * circumstances otherwise they could leak. The 'id' parameter, if non-NULL, + * represents the ENGINE id that the loader is looking for. If this is NULL, + * the shared library can choose to return failure or to initialise a + * 'default' ENGINE. If non-NULL, the shared library must initialise only an + * ENGINE matching the passed 'id'. The function is expected to be + * implemented with the symbol name "bind_engine". A standard implementation + * can be instantiated with IMPLEMENT_DYNAMIC_BIND_FN(fn) where the parameter + * 'fn' is a callback function that populates the ENGINE structure and + * returns an int value (zero for failure). 'fn' should have prototype; + * [static] int fn(ENGINE *e, const char *id); + */ +typedef int (*dynamic_bind_engine) (ENGINE *e, const char *id, + const dynamic_fns *fns); +# define IMPLEMENT_DYNAMIC_BIND_FN(fn) \ + OPENSSL_EXPORT \ + int bind_engine(ENGINE *e, const char *id, const dynamic_fns *fns); \ + OPENSSL_EXPORT \ + int bind_engine(ENGINE *e, const char *id, const dynamic_fns *fns) { \ + if (ENGINE_get_static_state() == fns->static_state) goto skip_cbs; \ + CRYPTO_set_mem_functions(fns->mem_fns.malloc_fn, \ + fns->mem_fns.realloc_fn, \ + fns->mem_fns.free_fn); \ + skip_cbs: \ + if (!fn(e, id)) return 0; \ + return 1; } + +/* + * If the loading application (or library) and the loaded ENGINE library + * share the same static data (eg. they're both dynamically linked to the + * same libcrypto.so) we need a way to avoid trying to set system callbacks - + * this would fail, and for the same reason that it's unnecessary to try. If + * the loaded ENGINE has (or gets from through the loader) its own copy of + * the libcrypto static data, we will need to set the callbacks. The easiest + * way to detect this is to have a function that returns a pointer to some + * static data and let the loading application and loaded ENGINE compare + * their respective values. + */ +void *ENGINE_get_static_state(void); + +# if defined(__OpenBSD__) || defined(__FreeBSD__) || defined(__DragonFly__) +# ifndef OPENSSL_NO_DEPRECATED_1_1_0 +OSSL_DEPRECATEDIN_1_1_0 void ENGINE_setup_bsd_cryptodev(void); +# endif +# endif + + +# ifdef __cplusplus +} +# endif +# endif /* OPENSSL_NO_ENGINE */ +#endif /* OPENSSL_ENGINE_H */ |