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
uint	v

Returns

Type	Description
uint	The result of (v + 1) modulo 2^32

Remarks

See ChaCha20 Spec Section 2.1.

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Rotate(uint, int)

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
uint	v
int	c

Returns

Type	Description
uint	The result of (v LEFTSHIFT c)

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ToBytes(byte[], uint, int)

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
byte[]	output
uint	input
int	outputOffset

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U8To32Little(byte[], int)

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
byte[]	p
int	inputOffset

Returns

Type	Description
uint	An unsigned 32-bit integer

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XOr(uint, uint)

Unchecked integer exclusive or (XOR) operation.

Declaration

public static uint XOr(uint v, uint w)

Parameters

Type	Name	Description
uint	v
uint	w

Returns

Type	Description
uint	The result of (v XOR w)