The "en" Package

These routines are meant to provide strong encryption.

Library: karma
Link With: -lkarma

en_idea_init	Create stream for IDEA encryption.
en_idea_cfb	Encrypt bytes using the IDEA cipher.
en_idea_close	Close a cipher stream.

Functions

idea_status en_idea_init (char key[EN_IDEA_KEY_SIZE], flag decrypt, char init_vector[EN_IDEA_BLOCK_SIZE], flag clear)

This routine will initialise the IDEA cipher in Cipher Feed Back mode for a stream of data. The stream is uni-directional.

Parameters:

key : The 16 byte IDEA key.
decrypt : If TRUE the stream is to be decrypted.
init_vector : The 8 byte initialisation vector.
clear : If TRUE the key and initialisation vector will be cleared after use (highly recommended if they will not be needed again).

Returns: An IDEA cipher status which may be sebsequently used by en_idea_cfb on success, else NULL.
Multithreading Level: Unsafe

void en_idea_cfb (idea_status status, char *buffer, unsigned int length)

This routine will encrypt (or decrypt) a sequence of bytes using the IDEA cipher in Cipher Feed Back mode.

Parameters:

Returns: Nothing.
Multithreading Level: Unsafe

void en_idea_close (idea_status status)

This routine will clean up an IDEA cipher status, removing sensitive key information.

Parameters:

Returns: Nothing.
Multithreading Level: Unsafe