internal

Documentation

Overview

Package internal values, structures, and functions that are not part of the public API.

Index

• func DstPrime(dst []byte) []byte
• func ExpandXMD(id crypto.Hash, input, dst []byte, length uint) []byte
• func ExpandXOF(ext *hash.ExtendableHash, input, dst []byte, length uint) []byte
• func I2OSP(value, length uint) []byte
• func MapToCurveSSWU(fp *field.Field, a, b, z, fe *big.Int) (x, y *big.Int)
• func VetDSTXMD(h hash.Hash, dst []byte) []byte
• func VetXofDST(x *hash.ExtendableHash, dst []byte) []byte

Functions

func DstPrime

func DstPrime(dst []byte) []byte

DstPrime length-suffix-encodes dst.

func ExpandXMD

func ExpandXMD(id crypto.Hash, input, dst []byte, length uint) []byte

ExpandXMD implements expand_message_xmd as specified in RFC 9380 section 5.3.1.

func ExpandXOF

func ExpandXOF(ext *hash.ExtendableHash, input, dst []byte, length uint) []byte

ExpandXOF implements expand_message_xof as specified in RFC 9380 section 5.3.2.

func I2OSP

func I2OSP(value, length uint) []byte

I2OSP 32-bit Integer to Octet Stream Primitive on maximum 4 bytes.

func MapToCurveSSWU

func MapToCurveSSWU(fp *field.Field, a, b, z, fe *big.Int) (x, y *big.Int)

MapToCurveSSWU implements the Simplified SWU method for Weierstrass curves for any base field.

func VetDSTXMD

func VetDSTXMD(h hash.Hash, dst []byte) []byte

VetDSTXMD computes a shorter tag for dst if the tag length exceeds 255 bytes.

func VetXofDST

func VetXofDST(x *hash.ExtendableHash, dst []byte) []byte

VetXofDST computes a shorter tag for dst if the tag length exceeds 255 bytes.