/*
-
+
silcchannel.h
-
+
Author: Pekka Riikonen <priikone@silcnet.org>
-
- Copyright (C) 1997 - 2001 Pekka Riikonen
-
+
+ Copyright (C) 1997 - 2005 Pekka Riikonen
+
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.
-
+ the Free Software Foundation; version 2 of the License.
+
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
*
* DESCRIPTION
*
- * Implementations of the Channel Payload, Channel Message Payload and
- * Channel Key Payload. The Channel Payload represents new channel and
- * is used to distribute the information of the new channel. The Channel
- * Message Payload is used to deliver messages to the channel. The routines
- * for Channel Message Payload also handles the encryption and decryption
- * of the payload. Last, the Channel Key Payload is used to distribute
- * a new key to the channel. It is done for example every time someone
- * joins a channel or the old key expires.
+ * Implementations of the Channel Payload and Channel Key Payload. The
+ * Channel Payload represents new channel and is used to distribute the
+ * information of the new channel. The Channel Key Payload is used to
+ * distribute a new key to the channel. It is done for example every
+ * time someone joins a channel or the old key expires.
*
***/
/****s* silccore/SilcChannelAPI/SilcChannelPayload
*
* NAME
- *
+ *
* typedef struct SilcChannelPayloadStruct *SilcChannelPayload;
*
* DESCRIPTION
***/
typedef struct SilcChannelPayloadStruct *SilcChannelPayload;
-/****s* silccore/SilcChannelAPI/SilcChannelMessagePayload
- *
- * NAME
- *
- * typedef struct
- * SilcChannelMessagePayloadStruct *SilcChannelMessagePayload;
- *
- * DESCRIPTION
- *
- * This context is the actual Channel Message Payload and is allocated
- * by silc_channel_message_payload_parse and given as argument usually to
- * all silc_channel_message_payload_* functions. It is freed by the
- * silc_channel_message_payload_free function.
- *
- ***/
-typedef struct SilcChannelMessagePayloadStruct *SilcChannelMessagePayload;
-
/****s* silccore/SilcChannelAPI/SilcChannelKeyPayload
*
* NAME
- *
+ *
* typedef struct SilcChannelKeyPayloadStruct *SilcChannelKeyPayload;
*
* DESCRIPTION
***/
typedef struct SilcChannelKeyPayloadStruct *SilcChannelKeyPayload;
-/****d* silccore/SilcChannelAPI/SilcMessageFlags
- *
- * NAME
- *
- * typedef SilcUInt16 SilcMessageFlags;
- *
- * DESCRIPTION
- *
- * The message flags type definition and the message flags. The
- * message flags are used to indicate some status of the message.
- * These flags are also used by the private message interfaces.
- *
- * SOURCE
- */
-typedef SilcUInt16 SilcMessageFlags;
-
-/* The message flags (shared by both channel and private messages) */
-#define SILC_MESSAGE_FLAG_NONE 0x0000 /* No flags */
-#define SILC_MESSAGE_FLAG_AUTOREPLY 0x0001 /* Automatically replied */
-#define SILC_MESSAGE_FLAG_NOREPLY 0x0002 /* Send no reply to this */
-#define SILC_MESSAGE_FLAG_ACTION 0x0004 /* Action message */
-#define SILC_MESSAGE_FLAG_NOTICE 0x0008 /* Notice message */
-#define SILC_MESSAGE_FLAG_REQUEST 0x0010 /* A request */
-#define SILC_MESSAGE_FLAG_SIGNED 0x0020 /* Message is signed */
-#define SILC_MESSAGE_FLAG_REPLY 0x0040 /* A reply */
-#define SILC_MESSAGE_FLAG_DATA 0x0080 /* MIME object */
-#define SILC_MESSAGE_FLAG_UTF8 0x0100 /* UTF-8 string */
-#define SILC_MESSAGE_FLAG_RESERVED 0x0200 /* to 0x0800 */
-#define SILC_MESSAGE_FLAG_PRIVATE 0x1000 /* to 0x8000 */
-/***/
-
/* Prototypes */
/****f* silccore/SilcChannelAPI/silc_channel_payload_parse
*
* SYNOPSIS
*
- * SilcChannelPayload
+ * SilcChannelPayload
* silc_channel_payload_parse(const unsigned char *payload,
* SilcUInt32 payload_len);
*
*
* SYNOPSIS
*
- * SilcChannelID *silc_channel_get_id_parse(SilcChannelPayload payload);
+ * SilcBool silc_channel_get_id_parse(SilcChannelPayload payload,
+ * SilcChannelID *ret_channel_id);
*
* DESCRIPTION
*
* Return the Channel ID as parsed ID. This is equivalent to the
- * silc_channel_get_id execpt that the ID is already parsed. The caller
- * must free the parsed Channel ID.
+ * silc_channel_get_id execpt that the ID is already parsed.
*
***/
-SilcChannelID *silc_channel_get_id_parse(SilcChannelPayload payload);
+SilcBool silc_channel_get_id_parse(SilcChannelPayload payload,
+ SilcChannelID *ret_channel_id);
/****f* silccore/SilcChannelAPI/silc_channel_get_mode
*
***/
SilcUInt32 silc_channel_get_mode(SilcChannelPayload payload);
-/****f* silccore/SilcChannelAPI/silc_channel_message_payload_decrypt
- *
- * SYNOPSIS
- *
- * bool silc_channel_message_payload_decrypt(unsigned char *data,
- * size_t data_len,
- * SilcCipher cipher,
- * SilcHmac hmac);
- *
- * DESCRIPTION
- *
- * Decrypt the channel message. First push the IV out of the packet `data'.
- * The IV is used in the decryption process. Then decrypt the message.
- * After decryption, take the MAC from the decrypted packet, compute MAC
- * and compare the MACs. If they match, the decryption was successful
- * and we have the channel message ready to be displayed.
- *
- * This is usually used by the Channel Message interface itself but can
- * be called by the appliation if separate decryption process is required.
- * For example server might need to call this directly in some
- * circumstances. The `cipher' is used to decrypt the payload.
- *
- * If `check_mac' is FALSE then MAC is not verified.
- *
- ***/
-bool silc_channel_message_payload_decrypt(unsigned char *data,
- size_t data_len,
- SilcCipher cipher,
- SilcHmac hmac,
- bool check_mac);
-
-/****f* silccore/SilcChannelAPI/silc_channel_message_payload_parse
- *
- * SYNOPSIS
- *
- * SilcChannelMessagePayload
- * silc_channel_message_payload_parse(const unsigned char *payload,
- * SilcUInt32 payload_len,
- * SilcCipher cipher,
- * SilcHmac hmac);
- *
- * DESCRIPTION
- *
- * Parses channel message payload returning new channel payload structure.
- * This also decrypts it and checks the MAC. The `cipher's is used to
- * decrypt the payload.
- *
- * If the `hmac' is no provided then the MAC of the channel message is
- * not verified.
- *
- ***/
-SilcChannelMessagePayload
-silc_channel_message_payload_parse(unsigned char *payload,
- SilcUInt32 payload_len,
- SilcCipher cipher,
- SilcHmac hmac);
-
-/****f* silccore/SilcChannelAPI/silc_channel_message_payload_encrypt
- *
- * SYNOPSIS
- *
- * bool silc_channel_message_payload_encrypt(unsigned char *data,
- * SilcUInt32 data_len,
- * unsigned char *iv,
- * SilcUInt32 iv_len,
- * SilcCipher cipher,
- * SilcHmac hmac);
- *
- * DESCRIPTION
- *
- * This function is used to encrypt the Channel Messsage Payload which is
- * the `data' and `data_len'. The `data_len' is the data length which is
- * used to create MAC out of. The `data' MUST have additional space
- * after `data_len' bytes for the MAC which is appended to the data.
- *
- * This is usually used by the Channel Message interface itself but can
- * be called by the appliation if separate encryption process is required.
- * For example server might need to call this directly in some
- * circumstances. The `cipher' is used to encrypt the payload.
- *
- ***/
-bool silc_channel_message_payload_encrypt(unsigned char *data,
- SilcUInt32 data_len,
- unsigned char *iv,
- SilcUInt32 iv_len,
- SilcCipher cipher,
- SilcHmac hmac);
-
-/****f* silccore/SilcChannelAPI/silc_channel_message_payload_encode
- *
- * SYNOPSIS
- *
- * SilcBuffer silc_channel_message_payload_encode(SilcMessageFlags flags,
- * SilcUInt16 data_len,
- * const unsigned char *data,
- * SilcUInt16 iv_len,
- * unsigned char *iv,
- * SilcCipher cipher,
- * SilcHmac hmac.
- * SilcRng rng);
- *
- * DESCRIPTION
- *
- * Encodes channel message payload into a buffer and returns it. This
- * is used to add channel message payload into a packet. As the channel
- * payload is encrypted separately from other parts of the packet padding
- * must be applied to the payload. The function generates the padding
- * automatically from random data. The `cipher' is the cipher used
- * encrypt the payload and `hmac' is used to compute the MAC for the
- * payload. If `rng' is NULL then global RNG is used, if non-NULL then
- * the `rng' is used.
- *
- ***/
-SilcBuffer silc_channel_message_payload_encode(SilcMessageFlags flags,
- SilcUInt16 data_len,
- const unsigned char *data,
- SilcUInt16 iv_len,
- unsigned char *iv,
- SilcCipher cipher,
- SilcHmac hmac,
- SilcRng rng);
-
-/****f* silccore/SilcChannelAPI/silc_channel_message_payload_free
- *
- * SYNOPSIS
- *
- * void
- * silc_channel_message_payload_free(SilcChannelMessagePayload payload);
- *
- * DESCRIPTION
- *
- * Free's Channel Message Payload and all data in it.
- *
- ***/
-void silc_channel_message_payload_free(SilcChannelMessagePayload payload);
-
-/****f* silccore/SilcChannelAPI/silc_channel_message_get_flags
- *
- * SYNOPSIS
- *
- * SilcMessageFlags
- * silc_channel_message_get_flags(SilcChannelMessagePayload payload);
- *
- * DESCRIPTION
- *
- * Returns the message flags from the payload.
- *
- ***/
-SilcMessageFlags
-silc_channel_message_get_flags(SilcChannelMessagePayload payload);
-
-/****f* silccore/SilcChannelAPI/silc_channel_message_get_data
- *
- * SYNOPSIS
- *
- * unsigned char *
- * silc_channel_message_get_data(SilcChannelMessagePayload payload,
- * SilcUInt32 *data_len);
- *
- * DESCRIPTION
- *
- * Return the data in the payload, that is, the actual channel message.
- * The caller must not free it.
- *
- ***/
-unsigned char *silc_channel_message_get_data(SilcChannelMessagePayload payload,
- SilcUInt32 *data_len);
-
-/****f* silccore/SilcChannelAPI/silc_channel_message_get_mac
- *
- * SYNOPSIS
- *
- * unsigned char *
- * silc_channel_message_get_mac(SilcChannelMessagePayload payload);
- *
- * DESCRIPTION
- *
- * Return the MAC of the payload. The caller must already know the
- * length of the MAC. The caller must not free the MAC.
- *
- ***/
-unsigned char *silc_channel_message_get_mac(SilcChannelMessagePayload payload);
-
-/****f* silccore/SilcChannelAPI/silc_channel_message_get_iv
- *
- * SYNOPSIS
- *
- * unsigned char *
- * silc_channel_message_get_iv(SilcChannelMessagePayload payload);
- *
- * DESCRIPTION
- *
- * Return the IV of the payload. The caller must already know the
- * length of the IV. The caller must not free the IV.
- *
- ***/
-unsigned char *silc_channel_message_get_iv(SilcChannelMessagePayload payload);
-
/****f* silccore/SilcChannelAPI/silc_channel_key_payload_parse
*
* SYNOPSIS
*
- * SilcChannelKeyPayload
+ * SilcChannelKeyPayload
* silc_channel_key_payload_parse(const unsigned char *payload,
* uin32 payload_len);
*
* DESCRIPTION
*
- * Parses channel key payload returning new channel key payload
+ * Parses channel key payload returning new channel key payload
* structure.
*
***/
-SilcChannelKeyPayload
+SilcChannelKeyPayload
silc_channel_key_payload_parse(const unsigned char *payload,
SilcUInt32 payload_len);
*
* DESCRIPTION
*
- * Encodes channel key payload into a buffer and returns it. This is used
+ * Encodes channel key payload into a buffer and returns it. This is used
* to add channel key payload into a packet.
*
***/
*
* SYNOPSIS
*
- * unsigned char *silc_channel_key_get_id(SilcChannelKeyPayload payload,
+ * unsigned char *silc_channel_key_get_id(SilcChannelKeyPayload payload,
* SilcUInt32 *id_len);
*
* DESCRIPTION
* free it.
*
***/
-unsigned char *silc_channel_key_get_id(SilcChannelKeyPayload payload,
+unsigned char *silc_channel_key_get_id(SilcChannelKeyPayload payload,
SilcUInt32 *id_len);
/****f* silccore/SilcChannelAPI/silc_channel_key_get_cipher
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