Module twofish Methods

AcquireTwofishInfo() allocate the TwofishInfo structure.

The format of the AcquireTwofishInfo method is:

  TwofishInfo *AcquireTwofishInfo(void)

DecipherTwofishBlock() deciphers a single block of ciphertext to produce a block of plaintext.

The format of the DecipherTwofishBlock method is:

       void DecipherTwofishBlock(TwofishInfo *twofish_info,
   const unsigned char *ciphertext,unsigned char plaintext)

A description of each parameter follows:

twofish_info

The cipher context.

ciphertext

The cipher text.

plaintext

The plaint text.

DestroyTwofishInfo() zeros memory associated with the TwofishInfo structure.

The format of the DestroyTwofishInfo method is:

  TwofishInfo *DestroyTwofishInfo(TwofishInfo *twofish_info)

A description of each parameter follows:

twofish_info

The cipher context.

EncipherTwofishBlock() encipher a single block of plaintext to produce a block of ciphertext.

The format of the EncipherTwofishBlock method is:

  void EncipherTwofishBlock(TwofishInfo *twofish_info,
    const unsigned char *plaintext,unsigned char *ciphertext)

A description of each parameter follows:

twofish_info

The cipher context.

plaintext

The plain text.

ciphertext

The cipher text.

GetTwofishBlocksize() returns the Twofish blocksize.

The format of the GetTwofishBlocksize method is:

  unsigned int *GetTwofishBlocksize(const TwofishInfo *twofish_info)

A description of each parameter follows:

twofish_info

The twofish info.

SetTwofishKey() sets the key for the Twofish cipher. The key length is specified in bits. Valid values are 128, 192, or 256 requiring a key buffer length in bytes of 16, 24, and 32 respectively.

The format of the SetTwofishKey method is:

  SetTwofishKey(TwofishInfo *twofish_info,const StringInfo *key)

A description of each parameter follows:

twofish_info

The cipher context.

key

The key.