SHI_BlockCipher Class

Generic block cipher interface. More...

Typedefs
typedef struct SHI_BlockCipher	SHI_BlockCipher
	A SHI_BlockCipher object decrypts blocks of data. More...

Functions
SHI_PUBLIC_API SHI_Result	SHI_BlockCipher_Destroy (SHI_BlockCipher *self)
	Destroys a block cipher object. More...
SHI_PUBLIC_API SHI_Size	SHI_BlockCipher_GetBlockSize (SHI_BlockCipher *self)
	Returns the block size for the block cipher. More...
SHI_PUBLIC_API SHI_Result	SHI_BlockCipher_DecryptBlock (SHI_BlockCipher *self, const unsigned char *in_block, unsigned char *out_block)
	Decrypt a block of data. More...
SHI_PUBLIC_API SHI_Result	SHI_BlockCipher_EncryptBlock (SHI_BlockCipher *self, const unsigned char *in_block, unsigned char *out_block)
	Encrypt a block of data. More...

Detailed Description

Generic block cipher interface.

Typedef Documentation

SHI_BlockCipher

typedef struct SHI_BlockCipher SHI_BlockCipher

A SHI_BlockCipher object decrypts blocks of data.

Function Documentation

SHI_BlockCipher_DecryptBlock()

SHI_PUBLIC_API SHI_Result SHI_BlockCipher_DecryptBlock	(	SHI_BlockCipher *	self,
		const unsigned char *	in_block,
		unsigned char *	out_block
	)

Decrypt a block of data.

Parameters

self	The SHI_BlockCipher on which the method is invoked.
in_block	Pointer to the block data to decrypt. The size of the block must be equal to the block size of the cipher algorithm implemented by this object.
out_block	Pointer to the memory buffer where the decrypted block data will be written. That buffer must be large enough to hold a full block.

SHI_BlockCipher_Destroy()

SHI_PUBLIC_API SHI_Result SHI_BlockCipher_Destroy

(

SHI_BlockCipher *

self

)

Destroys a block cipher object.

The object can no longer be used after this method returns.

Parameters

self	The SHI_BlockCipher to destroy.

SHI_BlockCipher_EncryptBlock()

SHI_PUBLIC_API SHI_Result SHI_BlockCipher_EncryptBlock	(	SHI_BlockCipher *	self,
		const unsigned char *	in_block,
		unsigned char *	out_block
	)

Encrypt a block of data.

Use this method to implement counter mode.

Parameters

self	The SHI_BlockCipher on which the method is invoked.
in_block	Pointer to the block data to encrypt. The size of the block must be equal to the block size of the cipher algorithm implemented by this object.
out_block	Pointer to the memory buffer where the encrypted block data will be written. That buffer must be large enough to hold a full block.

SHI_BlockCipher_GetBlockSize()

SHI_PUBLIC_API SHI_Size SHI_BlockCipher_GetBlockSize

(

SHI_BlockCipher *

self

)

Returns the block size for the block cipher.

Parameters

self	The SHI_BlockCipher on which the method is invoked.

Returns

The size, in bytes, of the blocks that this cipher can process.