#ifndef HEADER_ENGINE_H
#define HEADER_ENGINE_H
+#include <openssl/types.h>
#include <openssl/bn.h>
+#ifndef OPENSSL_NO_RSA
#include <openssl/rsa.h>
+#endif
+#ifndef OPENSSL_NO_DSA
#include <openssl/dsa.h>
+#endif
+#ifndef OPENSSL_NO_DH
#include <openssl/dh.h>
+#endif
#include <openssl/rand.h>
-#include <openssl/evp.h>
+#include <openssl/ui.h>
#include <openssl/symhacks.h>
#ifdef __cplusplus
extern "C" {
#endif
+/* Fixups for missing algorithms */
+#ifdef OPENSSL_NO_RSA
+typedef void RSA_METHOD;
+#endif
+#ifdef OPENSSL_NO_DSA
+typedef void DSA_METHOD;
+#endif
+#ifdef OPENSSL_NO_DH
+typedef void DH_METHOD;
+#endif
+
/* These flags are used to control combinations of algorithm (methods)
* by bitwise "OR"ing. */
#define ENGINE_METHOD_RSA (unsigned int)0x0001
/* ENGINE flags that can be set by ENGINE_set_flags(). */
/* #define ENGINE_FLAGS_MALLOCED 0x0001 */ /* Not used */
+/* This flag is for ENGINEs that wish to handle the various 'CMD'-related
+ * control commands on their own. Without this flag, ENGINE_ctrl() handles these
+ * control commands on behalf of the ENGINE using their "cmd_defns" data. */
+#define ENGINE_FLAGS_MANUAL_CMD_CTRL (int)0x0002
+
+/* This flag is for ENGINEs who return new duplicate structures when found via
+ * "ENGINE_by_id()". When an ENGINE must store state (eg. if ENGINE_ctrl()
+ * commands are called in sequence as part of some stateful process like
+ * key-generation setup and execution), it can set this flag - then each attempt
+ * to obtain the ENGINE will result in it being copied into a new structure.
+ * Normally, ENGINEs don't declare this flag so ENGINE_by_id() just increments
+ * the existing ENGINE's structural reference count. */
+#define ENGINE_FLAGS_BY_ID_COPY (int)0x0004
+
+/* ENGINEs can support their own command types, and these flags are used in
+ * ENGINE_CTRL_GET_CMD_FLAGS to indicate to the caller what kind of input each
+ * command expects. Currently only numeric and string input is supported. If a
+ * control command supports none of the _NUMERIC, _STRING, or _NO_INPUT options,
+ * then it is regarded as an "internal" control command - and not for use in
+ * config setting situations. As such, they're not available to the
+ * ENGINE_ctrl_cmd_string() function, only raw ENGINE_ctrl() access. Changes to
+ * this list of 'command types' should be reflected carefully in
+ * ENGINE_cmd_is_executable() and ENGINE_ctrl_cmd_string(). */
+
+/* accepts a 'long' input value (3rd parameter to ENGINE_ctrl) */
+#define ENGINE_CMD_FLAG_NUMERIC (unsigned int)0x0001
+/* accepts string input (cast from 'void*' to 'const char *', 4th parameter to
+ * ENGINE_ctrl) */
+#define ENGINE_CMD_FLAG_STRING (unsigned int)0x0002
+/* Indicates that the control command takes *no* input. Ie. the control command
+ * is unparameterised. */
+#define ENGINE_CMD_FLAG_NO_INPUT (unsigned int)0x0004
+/* Indicates that the control command is internal. This control command won't
+ * be shown in any output, and is only usable through the ENGINE_ctrl_cmd()
+ * function. */
+#define ENGINE_CMD_FLAG_INTERNAL (unsigned int)0x0008
+
+/* NB: These 3 control commands are deprecated and should not be used. ENGINEs
+ * relying on these commands should compile conditional support for
+ * compatibility (eg. if these symbols are defined) but should also migrate the
+ * same functionality to their own ENGINE-specific control functions that can be
+ * "discovered" by calling applications. The fact these control commands
+ * wouldn't be "executable" (ie. usable by text-based config) doesn't change the
+ * fact that application code can find and use them without requiring per-ENGINE
+ * hacking. */
+
/* These flags are used to tell the ctrl function what should be done.
* All command numbers are shared between all engines, even if some don't
* make sense to some engines. In such a case, they do nothing but return
#define ENGINE_CTRL_SET_PASSWORD_CALLBACK 2
#define ENGINE_CTRL_HUP 3 /* Close and reinitialise any
handles/connections etc. */
+#define ENGINE_CTRL_SET_USER_INTERFACE 4 /* Alternative to callback */
+#define ENGINE_CTRL_SET_CALLBACK_DATA 5 /* User-specific data, used
+ when calling the password
+ callback and the user
+ interface */
+
+/* These control commands allow an application to deal with an arbitrary engine
+ * in a dynamic way. Warn: Negative return values indicate errors FOR THESE
+ * COMMANDS because zero is used to indicate 'end-of-list'. Other commands,
+ * including ENGINE-specific command types, return zero for an error.
+ *
+ * An ENGINE can choose to implement these ctrl functions, and can internally
+ * manage things however it chooses - it does so by setting the
+ * ENGINE_FLAGS_MANUAL_CMD_CTRL flag (using ENGINE_set_flags()). Otherwise the
+ * ENGINE_ctrl() code handles this on the ENGINE's behalf using the cmd_defns
+ * data (set using ENGINE_set_cmd_defns()). This means an ENGINE's ctrl()
+ * handler need only implement its own commands - the above "meta" commands will
+ * be taken care of. */
+
+/* Returns non-zero if the supplied ENGINE has a ctrl() handler. If "not", then
+ * all the remaining control commands will return failure, so it is worth
+ * checking this first if the caller is trying to "discover" the engine's
+ * capabilities and doesn't want errors generated unnecessarily. */
+#define ENGINE_CTRL_HAS_CTRL_FUNCTION 10
+/* Returns a positive command number for the first command supported by the
+ * engine. Returns zero if no ctrl commands are supported. */
+#define ENGINE_CTRL_GET_FIRST_CMD_TYPE 11
+/* The 'long' argument specifies a command implemented by the engine, and the
+ * return value is the next command supported, or zero if there are no more. */
+#define ENGINE_CTRL_GET_NEXT_CMD_TYPE 12
+/* The 'void*' argument is a command name (cast from 'const char *'), and the
+ * return value is the command that corresponds to it. */
+#define ENGINE_CTRL_GET_CMD_FROM_NAME 13
+/* The next two allow a command to be converted into its corresponding string
+ * form. In each case, the 'long' argument supplies the command. In the NAME_LEN
+ * case, the return value is the length of the command name (not counting a
+ * trailing EOL). In the NAME case, the 'void*' argument must be a string buffer
+ * large enough, and it will be populated with the name of the command (WITH a
+ * trailing EOL). */
+#define ENGINE_CTRL_GET_NAME_LEN_FROM_CMD 14
+#define ENGINE_CTRL_GET_NAME_FROM_CMD 15
+/* The next two are similar but give a "short description" of a command. */
+#define ENGINE_CTRL_GET_DESC_LEN_FROM_CMD 16
+#define ENGINE_CTRL_GET_DESC_FROM_CMD 17
+/* With this command, the return value is the OR'd combination of
+ * ENGINE_CMD_FLAG_*** values that indicate what kind of input a given
+ * engine-specific ctrl command expects. */
+#define ENGINE_CTRL_GET_CMD_FLAGS 18
+
+/* ENGINE implementations should start the numbering of their own control
+ * commands from this value. (ie. ENGINE_CMD_BASE, ENGINE_CMD_BASE + 1, etc). */
+#define ENGINE_CMD_BASE 200
+
+/* NB: These 2 nCipher "chil" control commands are deprecated, and their
+ * functionality is now available through ENGINE-specific control commands
+ * (exposed through the above-mentioned 'CMD'-handling). Code using these 2
+ * commands should be migrated to the more general command handling before these
+ * are removed. */
/* Flags specific to the nCipher "chil" engine */
#define ENGINE_CTRL_CHIL_SET_FORKCHECK 100
/* 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;
+
/* As we're missing a BIGNUM_METHOD, we need a couple of locally
* defined function types that engines can implement. */
/* Specific control function pointer */
typedef int (*ENGINE_CTRL_FUNC_PTR)(ENGINE *, int, long, void *, void (*f)());
/* Generic load_key function pointer */
-typedef EVP_PKEY * (*ENGINE_LOAD_KEY_PTR)(ENGINE *, const char *, const char *);
-
-/* 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 allow 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_new
- * 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). */
+typedef EVP_PKEY * (*ENGINE_LOAD_KEY_PTR)(ENGINE *, const char *,
+ UI_METHOD *ui_method, void *callback_data);
+
+/* 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);
void ENGINE_load_atalla(void);
void ENGINE_load_nuron(void);
void ENGINE_load_ubsec(void);
+void ENGINE_load_openbsd_dev_crypto(void);
void ENGINE_load_builtin_engines(void);
+/* Load all the currently known ciphers from all engines */
+void ENGINE_load_ciphers(void);
+
+/* Send parametrised control commands to the engine. The possibilities to send
+ * down an integer, a pointer to data or a function pointer are provided. Any of
+ * the parameters may or may not be NULL, depending on the command number. In
+ * actuality, this function only requires a structural (rather than functional)
+ * reference to an engine, but many control commands may require the engine be
+ * functional. The caller should be aware of trying commands that require an
+ * operational ENGINE, and only use functional references in such situations. */
+int ENGINE_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)());
+
+/* This function tests if an ENGINE-specific command is usable as a "setting".
+ * Eg. in an application's config file that gets processed through
+ * ENGINE_ctrl_cmd_string(). If this returns zero, it is not available to
+ * ENGINE_ctrl_cmd_string(), only ENGINE_ctrl(). */
+int ENGINE_cmd_is_executable(ENGINE *e, int cmd);
+
+/* This function works like ENGINE_ctrl() with the exception of taking a
+ * command name instead of a command number, and can handle optional commands.
+ * See the comment on ENGINE_ctrl_cmd_string() for an explanation on how to
+ * use the cmd_name and cmd_optional. */
+int ENGINE_ctrl_cmd(ENGINE *e, const char *cmd_name,
+ long i, void *p, void (*f)(), int cmd_optional);
+
+/* This function passes a command-name and argument to an ENGINE. The cmd_name
+ * is converted to a command number and the control command is called using
+ * 'arg' as an argument (unless the ENGINE doesn't support such a command, in
+ * which case no control command is called). The command is checked for input
+ * flags, and if necessary the argument will be converted to a numeric value. If
+ * cmd_optional is non-zero, then if the ENGINE doesn't support the given
+ * cmd_name the return value will be success anyway. This function is intended
+ * for applications to use so that users (or config files) can supply
+ * engine-specific config data to the ENGINE at run-time to control behaviour of
+ * specific engines. As such, it shouldn't be used for calling ENGINE_ctrl()
+ * functions that return data, deal with binary data, or that are otherwise
+ * supposed to be used directly through ENGINE_ctrl() in application code. Any
+ * "return" data from an ENGINE_ctrl() operation in this function will be lost -
+ * the return value is interpreted as failure if the return value is zero,
+ * success otherwise, and this function returns a boolean value as a result. In
+ * other words, vendors of 'ENGINE'-enabled devices should write ENGINE
+ * implementations with parameterisations that work in this scheme, so that
+ * compliant ENGINE-based applications can work consistently with the same
+ * configuration for the same ENGINE-enabled devices, across applications. */
+int ENGINE_ctrl_cmd_string(ENGINE *e, const char *cmd_name, const char *arg,
+ int cmd_optional);
+
/* These functions are useful for manufacturing new ENGINE structures. They
* don't address reference counting at all - one uses them to populate an ENGINE
* structure with personalised implementations of things prior to using it
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_flags(ENGINE *e, int flags);
+int ENGINE_set_cmd_defns(ENGINE *e, const ENGINE_CMD_DEFN *defns);
+int ENGINE_add_cipher(ENGINE *e,const EVP_CIPHER *c);
+/* Copies across all ENGINE methods and pointers. NB: This does *not* change
+ * reference counts however. */
int ENGINE_cpy(ENGINE *dest, const ENGINE *src);
+/* These functions (and the "get" function lower down) allow control over any
+ * per-structure ENGINE data. */
+int ENGINE_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
+ CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func);
+int ENGINE_set_ex_data(ENGINE *e, int idx, void *arg);
+/* Cleans the internal engine list. This should only be used when the
+ * application is about to exit or restart operation (the next operation
+ * requiring the ENGINE list will re-initialise it with defaults). NB: Dynamic
+ * ENGINEs will only truly unload (including any allocated data or loaded
+ * shared-libraries) if all remaining references are released too - so keys,
+ * certificates, etc all need to be released for an in-use ENGINE to unload. */
+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
const DSA_METHOD *ENGINE_get_DSA(const ENGINE *e);
const DH_METHOD *ENGINE_get_DH(const ENGINE *e);
const RAND_METHOD *ENGINE_get_RAND(const ENGINE *e);
+int ENGINE_cipher_num(const ENGINE *e);
+const EVP_CIPHER *ENGINE_get_cipher(const ENGINE *e, int n);
BN_MOD_EXP ENGINE_get_BN_mod_exp(const ENGINE *e);
BN_MOD_EXP_CRT ENGINE_get_BN_mod_exp_crt(const ENGINE *e);
ENGINE_GEN_INT_FUNC_PTR ENGINE_get_init_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);
+const ENGINE_CMD_DEFN *ENGINE_get_cmd_defns(const ENGINE *e);
int ENGINE_get_flags(const ENGINE *e);
+void *ENGINE_get_ex_data(const ENGINE *e, int idx);
/* FUNCTIONAL functions. These functions deal with ENGINE structures
* that have (or will) be initialised for use. Broadly speaking, the
* a corresponding call to ENGINE_free as it also releases a structural
* reference. */
int ENGINE_finish(ENGINE *e);
-/* Send control parametrised 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 */
-/* WARNING: This is currently experimental and may change radically! */
-int ENGINE_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)());
/* 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,
- const char *passphrase);
+ UI_METHOD *ui_method, void *callback_data);
EVP_PKEY *ENGINE_load_public_key(ENGINE *e, const char *key_id,
- const char *passphrase);
+ 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
* ENGINE_METHOD_*** defines above. */
int ENGINE_set_default(ENGINE *e, unsigned int flags);
+/* This function resets all the internal "default" ENGINEs (there's one for each
+ * of the various algorithms) to NULL, releasing any references as appropriate.
+ * This function is called as part of the ENGINE_cleanup() function, so there's
+ * no need to call both (although no harm is done). */
+int ENGINE_clear_defaults(void);
+
+/* Instruct an engine to load any EVP ciphers it knows of */
+/* XXX make this work via defaults? */
+void ENGINE_load_engine_ciphers(ENGINE *e);
+/* Get a particular cipher from a particular engine - NULL if the engine
+ * doesn't have it */
+const EVP_CIPHER *ENGINE_get_cipher_by_name(ENGINE *e,const char *name);
+
+
/* Obligatory error function. */
void ERR_load_ENGINE_strings(void);
-/*
- * Error codes for all engine functions. NB: We use "generic"
- * function names instead of per-implementation ones because this
- * levels the playing field for externally implemented bootstrapped
- * support code. As the filename and line number is included, it's
- * more important to indicate the type of function, so that
- * bootstrapped code (that can't easily add its own errors in) can
- * use the same error codes too.
- */
-
/* BEGIN ERROR CODES */
/* The following lines are auto generated by the script mkerr.pl. Any changes
* made after this point may be overwritten when the script is next run.
*/
+void ERR_load_ENGINE_strings(void);
/* Error codes for the ENGINE functions. */
/* Function codes. */
+#define ENGINE_F_ATALLA_CTRL 173
#define ENGINE_F_ATALLA_FINISH 159
#define ENGINE_F_ATALLA_INIT 160
#define ENGINE_F_ATALLA_MOD_EXP 161
#define ENGINE_F_ATALLA_RSA_MOD_EXP 162
+#define ENGINE_F_CSWIFT_CTRL 174
#define ENGINE_F_CSWIFT_DSA_SIGN 133
#define ENGINE_F_CSWIFT_DSA_VERIFY 134
#define ENGINE_F_CSWIFT_FINISH 100
#define ENGINE_F_CSWIFT_RSA_MOD_EXP 104
#define ENGINE_F_ENGINE_ADD 105
#define ENGINE_F_ENGINE_BY_ID 106
+#define ENGINE_F_ENGINE_CMD_IS_EXECUTABLE 170
#define ENGINE_F_ENGINE_CTRL 142
+#define ENGINE_F_ENGINE_CTRL_CMD 178
+#define ENGINE_F_ENGINE_CTRL_CMD_STRING 171
#define ENGINE_F_ENGINE_FINISH 107
#define ENGINE_F_ENGINE_FREE 108
+#define ENGINE_F_ENGINE_GET_DEFAULT_TYPE 177
#define ENGINE_F_ENGINE_GET_NEXT 115
#define ENGINE_F_ENGINE_GET_PREV 116
#define ENGINE_F_ENGINE_INIT 119
#define ENGINE_F_HWCRHK_FINISH 135
#define ENGINE_F_HWCRHK_GET_PASS 155
#define ENGINE_F_HWCRHK_INIT 136
+#define ENGINE_F_HWCRHK_INSERT_CARD 179
#define ENGINE_F_HWCRHK_LOAD_PRIVKEY 153
#define ENGINE_F_HWCRHK_LOAD_PUBKEY 154
#define ENGINE_F_HWCRHK_MOD_EXP 137
#define ENGINE_F_HWCRHK_MOD_EXP_CRT 138
#define ENGINE_F_HWCRHK_RAND_BYTES 139
#define ENGINE_F_HWCRHK_RSA_MOD_EXP 140
+#define ENGINE_F_INT_CTRL_HELPER 172
#define ENGINE_F_LOG_MESSAGE 141
+#define ENGINE_F_NURON_CTRL 175
#define ENGINE_F_NURON_FINISH 157
#define ENGINE_F_NURON_INIT 156
#define ENGINE_F_NURON_MOD_EXP 158
+#define ENGINE_F_UBSEC_CTRL 176
#define ENGINE_F_UBSEC_DSA_SIGN 163
#define ENGINE_F_UBSEC_DSA_VERIFY 164
#define ENGINE_F_UBSEC_FINISH 165
/* Reason codes. */
#define ENGINE_R_ALREADY_LOADED 100
+#define ENGINE_R_ARGUMENT_IS_NOT_A_NUMBER 133
#define ENGINE_R_BIO_WAS_FREED 121
#define ENGINE_R_BN_CTX_FULL 101
#define ENGINE_R_BN_EXPAND_FAIL 102
#define ENGINE_R_CHIL_ERROR 123
+#define ENGINE_R_CMD_NOT_EXECUTABLE 134
+#define ENGINE_R_COMMAND_TAKES_INPUT 135
+#define ENGINE_R_COMMAND_TAKES_NO_INPUT 136
#define ENGINE_R_CONFLICTING_ENGINE_ID 103
#define ENGINE_R_CTRL_COMMAND_NOT_IMPLEMENTED 119
+#define ENGINE_R_DH_NOT_IMPLEMENTED 139
+#define ENGINE_R_DSA_NOT_IMPLEMENTED 140
#define ENGINE_R_DSO_FAILURE 104
#define ENGINE_R_DSO_FUNCTION_NOT_FOUND 131
#define ENGINE_R_DSO_NOT_FOUND 132
#define ENGINE_R_ID_OR_NAME_MISSING 108
#define ENGINE_R_INIT_FAILED 109
#define ENGINE_R_INTERNAL_LIST_ERROR 110
+#define ENGINE_R_INVALID_CMD_NAME 137
+#define ENGINE_R_INVALID_CMD_NUMBER 138
#define ENGINE_R_MISSING_KEY_COMPONENTS 111
#define ENGINE_R_NOT_INITIALISED 117
#define ENGINE_R_NOT_LOADED 112
#define ENGINE_R_NO_REFERENCE 130
#define ENGINE_R_NO_SUCH_ENGINE 116
#define ENGINE_R_NO_UNLOAD_FUNCTION 126
+#define ENGINE_R_PRIVATE_KEY_ALGORITHMS_DISABLED 142
#define ENGINE_R_PROVIDE_PARAMETERS 113
#define ENGINE_R_REQUEST_FAILED 114
#define ENGINE_R_REQUEST_FALLBACK 118
+#define ENGINE_R_RSA_NOT_IMPLEMENTED 141
#define ENGINE_R_SIZE_TOO_LARGE_OR_TOO_SMALL 122
#define ENGINE_R_UNIT_FAILURE 115
}
#endif
#endif
-
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