Class Util

Utilities that are used during compression

Inheritance

System.Object

Util

Inherited Members

System.Object.ToString()

System.Object.Equals(System.Object)

System.Object.Equals(System.Object, System.Object)

System.Object.ReferenceEquals(System.Object, System.Object)

System.Object.GetHashCode()

System.Object.GetType()

System.Object.MemberwiseClone()

Namespace: CSChaCha20

Assembly: cs.temp.dll.dll

Syntax

public static class Util

Methods

Add(UInt32, UInt32)

Unchecked integer addition. The ChaCha spec defines certain operations to use 32-bit unsigned integer addition modulo 2^32.

Declaration

public static uint Add(uint v, uint w)

Parameters

Type	Name	Description
System.UInt32	v
System.UInt32	w

Returns

Type	Description
System.UInt32	The result of (v + w) modulo 2^32

Remarks

See ChaCha20 Spec Section 2.1.

AddOne(UInt32)

Add 1 to the input parameter using unchecked integer addition. The ChaCha spec defines certain operations to use 32-bit unsigned integer addition modulo 2^32.

Declaration

public static uint AddOne(uint v)

Parameters

Type	Name	Description
System.UInt32	v

Returns

Type	Description
System.UInt32	The result of (v + 1) modulo 2^32

Remarks

See ChaCha20 Spec Section 2.1.

Rotate(UInt32, Int32)

n-bit left rotation operation (towards the high bits) for 32-bit integers.

Declaration

public static uint Rotate(uint v, int c)

Parameters

Type	Name	Description
System.UInt32	v
System.Int32	c

Returns

Type	Description
System.UInt32	The result of (v LEFTSHIFT c)

ToBytes(Byte[], UInt32, Int32)

Serialize the input integer into the output buffer. The input integer will be split into 4 bytes and put into four sequential places in the output buffer, starting at the outputOffset.

Declaration

public static void ToBytes(byte[] output, uint input, int outputOffset)

Parameters

Type	Name	Description
System.Byte[]	output
System.UInt32	input
System.Int32	outputOffset

U8To32Little(Byte[], Int32)

Convert four bytes of the input buffer into an unsigned 32-bit integer, beginning at the inputOffset.

Declaration

public static uint U8To32Little(byte[] p, int inputOffset)

Parameters

Type	Name	Description
System.Byte[]	p
System.Int32	inputOffset

Returns

Type	Description
System.UInt32	An unsigned 32-bit integer

XOr(UInt32, UInt32)

Unchecked integer exclusive or (XOR) operation.

Declaration

public static uint XOr(uint v, uint w)

Parameters

Type	Name	Description
System.UInt32	v
System.UInt32	w

Returns

Type	Description
System.UInt32	The result of (v XOR w)