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- /**
- * @file cipher.h Purple Cipher API
- * @ingroup core
- *
- * purple
- *
- * Purple is the legal property of its developers, whose names are too numerous
- * to list here. Please refer to the COPYRIGHT file distributed with this
- * source distribution.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
- #ifndef PURPLE_CIPHER_H
- #define PURPLE_CIPHER_H
-
- #include <glib.h>
-
- #define PURPLE_CIPHER(obj) ((PurpleCipher *)(obj)) /**< PurpleCipher typecast helper */
- #define PURPLE_CIPHER_OPS(obj) ((PurpleCipherOps *)(obj)) /**< PurpleCipherInfo typecase helper */
- #define PURPLE_CIPHER_CONTEXT(obj) ((PurpleCipherContext *)(obj)) /**< PurpleCipherContext typecast helper */
-
- typedef struct _PurpleCipher PurpleCipher; /**< A handle to a PurpleCipher */
- typedef struct _PurpleCipherOps PurpleCipherOps; /**< Ops for a PurpleCipher */
- typedef struct _PurpleCipherContext PurpleCipherContext; /**< A context for a PurpleCipher */
-
-
- /**
- * The operation flags for a cipher
- */
- typedef enum _PurpleCipherCaps {
- PURPLE_CIPHER_CAPS_SET_OPT = 1 << 1, /**< Set option flag */
- PURPLE_CIPHER_CAPS_GET_OPT = 1 << 2, /**< Get option flag */
- PURPLE_CIPHER_CAPS_INIT = 1 << 3, /**< Init flag */
- PURPLE_CIPHER_CAPS_RESET = 1 << 4, /**< Reset flag */
- PURPLE_CIPHER_CAPS_UNINIT = 1 << 5, /**< Uninit flag */
- PURPLE_CIPHER_CAPS_SET_IV = 1 << 6, /**< Set IV flag */
- PURPLE_CIPHER_CAPS_APPEND = 1 << 7, /**< Append flag */
- PURPLE_CIPHER_CAPS_DIGEST = 1 << 8, /**< Digest flag */
- PURPLE_CIPHER_CAPS_ENCRYPT = 1 << 9, /**< Encrypt flag */
- PURPLE_CIPHER_CAPS_DECRYPT = 1 << 10, /**< Decrypt flag */
- PURPLE_CIPHER_CAPS_SET_SALT = 1 << 11, /**< Set salt flag */
- PURPLE_CIPHER_CAPS_GET_SALT_SIZE = 1 << 12, /**< Get salt size flag */
- PURPLE_CIPHER_CAPS_SET_KEY = 1 << 13, /**< Set key flag */
- PURPLE_CIPHER_CAPS_GET_KEY_SIZE = 1 << 14, /**< Get key size flag */
- PURPLE_CIPHER_CAPS_UNKNOWN = 1 << 16 /**< Unknown */
- } PurpleCipherCaps;
-
- /**
- * The operations of a cipher. Every cipher must implement one of these.
- */
- struct _PurpleCipherOps {
- /** The set option function */
- void (*set_option)(PurpleCipherContext *context, const gchar *name, void *value);
-
- /** The get option function */
- void *(*get_option)(PurpleCipherContext *context, const gchar *name);
-
- /** The init function */
- void (*init)(PurpleCipherContext *context, void *extra);
-
- /** The reset function */
- void (*reset)(PurpleCipherContext *context, void *extra);
-
- /** The uninit function */
- void (*uninit)(PurpleCipherContext *context);
-
- /** The set initialization vector function */
- void (*set_iv)(PurpleCipherContext *context, guchar *iv, size_t len);
-
- /** The append data function */
- void (*append)(PurpleCipherContext *context, const guchar *data, size_t len);
-
- /** The digest function */
- gboolean (*digest)(PurpleCipherContext *context, size_t in_len, guchar digest[], size_t *out_len);
-
- /** The encrypt function */
- int (*encrypt)(PurpleCipherContext *context, const guchar data[], size_t len, guchar output[], size_t *outlen);
-
- /** The decrypt function */
- int (*decrypt)(PurpleCipherContext *context, const guchar data[], size_t len, guchar output[], size_t *outlen);
-
- /** The set salt function */
- void (*set_salt)(PurpleCipherContext *context, guchar *salt);
-
- /** The get salt size function */
- size_t (*get_salt_size)(PurpleCipherContext *context);
-
- /** The set key function */
- void (*set_key)(PurpleCipherContext *context, const guchar *key);
-
- /** The get key size function */
- size_t (*get_key_size)(PurpleCipherContext *context);
-
- void (*_purple_reserved1)(void);
- void (*_purple_reserved2)(void);
- void (*_purple_reserved3)(void);
- void (*_purple_reserved4)(void);
- };
-
- #ifdef __cplusplus
- extern "C" {
- #endif /* __cplusplus */
-
- /*****************************************************************************/
- /** @name PurpleCipher API */
- /*****************************************************************************/
- /*@{*/
-
- /**
- * Gets a cipher's name
- *
- * @param cipher The cipher handle
- *
- * @return The cipher's name
- */
- const gchar *purple_cipher_get_name(PurpleCipher *cipher);
-
- /**
- * Gets a cipher's capabilities
- *
- * @param cipher The cipher handle
- *
- * @return The cipher's info
- */
- guint purple_cipher_get_capabilities(PurpleCipher *cipher);
-
- /**
- * Gets a digest from a cipher
- *
- * @param name The cipher's name
- * @param data The data to hash
- * @param data_len The length of the data
- * @param in_len The length of the buffer
- * @param digest The returned digest
- * @param out_len The length written
- *
- * @return @c TRUE if successful, @c FALSE otherwise
- */
- gboolean purple_cipher_digest_region(const gchar *name, const guchar *data, size_t data_len, size_t in_len, guchar digest[], size_t *out_len);
-
- /*@}*/
- /******************************************************************************/
- /** @name PurpleCiphers API */
- /******************************************************************************/
- /*@{*/
-
- /**
- * Finds a cipher by it's name
- *
- * @param name The name of the cipher to find
- *
- * @return The cipher handle or @c NULL
- */
- PurpleCipher *purple_ciphers_find_cipher(const gchar *name);
-
- /**
- * Registers a cipher as a usable cipher
- *
- * @param name The name of the new cipher
- * @param ops The cipher ops to register
- *
- * @return The handle to the new cipher or @c NULL if it failed
- */
- PurpleCipher *purple_ciphers_register_cipher(const gchar *name, PurpleCipherOps *ops);
-
- /**
- * Unregisters a cipher
- *
- * @param cipher The cipher handle to unregister
- *
- * @return Whether or not the cipher was successfully unloaded
- */
- gboolean purple_ciphers_unregister_cipher(PurpleCipher *cipher);
-
- /**
- * Gets the list of ciphers
- *
- * @return The list of available ciphers
- * @note This list should not be modified, it is owned by the cipher core
- */
- GList *purple_ciphers_get_ciphers(void);
-
- /*@}*/
- /******************************************************************************/
- /** @name PurpleCipher Subsystem API */
- /******************************************************************************/
- /*@{*/
-
- /**
- * Gets the handle to the cipher subsystem
- *
- * @return The handle to the cipher subsystem
- */
- gpointer purple_ciphers_get_handle(void);
-
- /**
- * Initializes the cipher core
- */
- void purple_ciphers_init(void);
-
- /**
- * Uninitializes the cipher core
- */
- void purple_ciphers_uninit(void);
-
- /*@}*/
- /******************************************************************************/
- /** @name PurpleCipherContext API */
- /******************************************************************************/
- /*@{*/
-
- /**
- * Sets the value an option on a cipher context
- *
- * @param context The cipher context
- * @param name The name of the option
- * @param value The value to set
- */
- void purple_cipher_context_set_option(PurpleCipherContext *context, const gchar *name, gpointer value);
-
- /**
- * Gets the vale of an option on a cipher context
- *
- * @param context The cipher context
- * @param name The name of the option
- * @return The value of the option
- */
- gpointer purple_cipher_context_get_option(PurpleCipherContext *context, const gchar *name);
-
- /**
- * Creates a new cipher context and initializes it
- *
- * @param cipher The cipher to use
- * @param extra Extra data for the specific cipher
- *
- * @return The new cipher context
- */
- PurpleCipherContext *purple_cipher_context_new(PurpleCipher *cipher, void *extra);
-
- /**
- * Creates a new cipher context by the cipher name and initializes it
- *
- * @param name The cipher's name
- * @param extra Extra data for the specific cipher
- *
- * @return The new cipher context
- */
- PurpleCipherContext *purple_cipher_context_new_by_name(const gchar *name, void *extra);
-
- /**
- * Resets a cipher context to it's default value
- * @note If you have set an IV you will have to set it after resetting
- *
- * @param context The context to reset
- * @param extra Extra data for the specific cipher
- */
- void purple_cipher_context_reset(PurpleCipherContext *context, gpointer extra);
-
- /**
- * Destorys a cipher context and deinitializes it
- *
- * @param context The cipher context to destory
- */
- void purple_cipher_context_destroy(PurpleCipherContext *context);
-
- /**
- * Sets the initialization vector for a context
- * @note This should only be called right after a cipher context is created or reset
- *
- * @param context The context to set the IV to
- * @param iv The initialization vector to set
- * @param len The len of the IV
- */
- void purple_cipher_context_set_iv(PurpleCipherContext *context, guchar *iv, size_t len);
-
- /**
- * Appends data to the context
- *
- * @param context The context to append data to
- * @param data The data to append
- * @param len The length of the data
- */
- void purple_cipher_context_append(PurpleCipherContext *context, const guchar *data, size_t len);
-
- /**
- * Digests a context
- *
- * @param context The context to digest
- * @param in_len The length of the buffer
- * @param digest The return buffer for the digest
- * @param out_len The length of the returned value
- */
- gboolean purple_cipher_context_digest(PurpleCipherContext *context, size_t in_len, guchar digest[], size_t *out_len);
-
- /**
- * Converts a guchar digest into a hex string
- *
- * @param context The context to get a digest from
- * @param in_len The length of the buffer
- * @param digest_s The return buffer for the string digest
- * @param out_len The length of the returned value
- */
- gboolean purple_cipher_context_digest_to_str(PurpleCipherContext *context, size_t in_len, gchar digest_s[], size_t *out_len);
-
- /**
- * Encrypts data using the context
- *
- * @param context The context
- * @param data The data to encrypt
- * @param len The length of the data
- * @param output The output buffer
- * @param outlen The len of data that was outputed
- *
- * @return A cipher specific status code
- */
- gint purple_cipher_context_encrypt(PurpleCipherContext *context, const guchar data[], size_t len, guchar output[], size_t *outlen);
-
- /**
- * Decrypts data using the context
- *
- * @param context The context
- * @param data The data to encrypt
- * @param len The length of the returned value
- * @param output The output buffer
- * @param outlen The len of data that was outputed
- *
- * @return A cipher specific status code
- */
- gint purple_cipher_context_decrypt(PurpleCipherContext *context, const guchar data[], size_t len, guchar output[], size_t *outlen);
-
- /**
- * Sets the salt on a context
- *
- * @param context The context who's salt to set
- * @param salt The salt
- */
- void purple_cipher_context_set_salt(PurpleCipherContext *context, guchar *salt);
-
- /**
- * Gets the size of the salt if the cipher supports it
- *
- * @param context The context who's salt size to get
- *
- * @return The size of the salt
- */
- size_t purple_cipher_context_get_salt_size(PurpleCipherContext *context);
-
- /**
- * Sets the key on a context
- *
- * @param context The context who's key to set
- * @param key The key
- */
- void purple_cipher_context_set_key(PurpleCipherContext *context, const guchar *key);
-
- /**
- * Gets the key size for a context
- *
- * @param context The context who's key size to get
- *
- * @return The size of the key
- */
- size_t purple_cipher_context_get_key_size(PurpleCipherContext *context);
-
- /**
- * Sets the cipher data for a context
- *
- * @param context The context who's cipher data to set
- * @param data The cipher data to set
- */
- void purple_cipher_context_set_data(PurpleCipherContext *context, gpointer data);
-
- /**
- * Gets the cipher data for a context
- *
- * @param context The context who's cipher data to get
- *
- * @return The cipher data
- */
- gpointer purple_cipher_context_get_data(PurpleCipherContext *context);
-
- /*@}*/
- /*****************************************************************************/
- /** @name Purple Cipher HTTP Digest Helper Functions */
- /*****************************************************************************/
- /*@{*/
-
- /**
- * Calculates a session key for HTTP Digest authentation
- *
- * See RFC 2617 for more information.
- *
- * @param algorithm The hash algorithm to use
- * @param username The username provided by the user
- * @param realm The authentication realm provided by the server
- * @param password The password provided by the user
- * @param nonce The nonce provided by the server
- * @param client_nonce The nonce provided by the client
- *
- * @return The session key, or @c NULL if an error occurred.
- */
- gchar *purple_cipher_http_digest_calculate_session_key(
- const gchar *algorithm, const gchar *username,
- const gchar *realm, const gchar *password,
- const gchar *nonce, const gchar *client_nonce);
-
- /** Calculate a response for HTTP Digest authentication
- *
- * See RFC 2617 for more information.
- *
- * @param algorithm The hash algorithm to use
- * @param method The HTTP method in use
- * @param digest_uri The URI from the initial request
- * @param qop The "quality of protection"
- * @param entity The entity body
- * @param nonce The nonce provided by the server
- * @param nonce_count The nonce count
- * @param client_nonce The nonce provided by the client
- * @param session_key The session key from purple_cipher_http_digest_calculate_session_key()
- *
- * @return The hashed response, or @c NULL if an error occurred.
- */
- gchar *purple_cipher_http_digest_calculate_response(
- const gchar *algorithm, const gchar *method,
- const gchar *digest_uri, const gchar *qop,
- const gchar *entity, const gchar *nonce,
- const gchar *nonce_count, const gchar *client_nonce,
- const gchar *session_key);
-
- /*@}*/
-
- #ifdef __cplusplus
- }
- #endif /* __cplusplus */
-
- #endif /* PURPLE_CIPHER_H */
-