Class SM4Engine

Namespace

Org.BouncyCastle.Crypto.Engines

Assembly

BouncyCastle.Cryptography.dll

SM4 Block Cipher - SM4 is a 128 bit block cipher with a 128 bit key.

public class SM4Engine : IBlockCipher

Inheritance

object

SM4Engine

Implements

IBlockCipher

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Remarks

The implementation here is based on the document http://eprint.iacr.org/2008/329.pdf by Whitfield Diffie and George Ledin, which is a translation of Prof. LU Shu-wang's original standard.

Properties

AlgorithmName

The name of the algorithm this cipher implements.

public virtual string AlgorithmName { get; }

Property Value

string

Methods

GetBlockSize()

public virtual int GetBlockSize()

Returns

int

The block size for this cipher, in bytes.

Init(bool, ICipherParameters)

Initialise the cipher.

public virtual void Init(bool forEncryption, ICipherParameters parameters)

Parameters

forEncryption bool

Initialise for encryption if true, for decryption if false.

parameters ICipherParameters

The key or other data required by the cipher.

ProcessBlock(byte[], int, byte[], int)

Process a block.

public virtual int ProcessBlock(byte[] input, int inOff, byte[] output, int outOff)

Parameters

input byte[]

inOff int

The offset into that the input block begins.

output byte[]

outOff int

The offset into to write the output block.

Returns

int

The number of bytes processed and produced.

Exceptions

DataLengthException

If input block is wrong size, or outBuf too small.

ProcessBlock(ReadOnlySpan<byte>, Span<byte>)

Process a block.

public virtual int ProcessBlock(ReadOnlySpan<byte> input, Span<byte> output)

Parameters

input ReadOnlySpan<byte>

The input block as a span.

output Span<byte>

The output span.

Returns

int

The number of bytes processed and produced.

Exceptions

DataLengthException

If input block is wrong size, or output span too small.