crypto

package
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 Go to latest Published: Oct 11, 2018 License: Apache-2.0 Imports: 14 Imported by: 0

Documentation

Overview

Copyright 2018 ProximaX Limited. All rights reserved. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.

Index

Constants

View Source 
const COMPRESSED_KEY_SIZE = 32
View Source 
const Ed25519FieldI = "b0a00e4a271beec478e42fad0618432fa7d7fb3d99004d2b0bdfc14f8024832b"

Variables

View Source 
var A = &Ed25519FieldElement{[]intRaw{
	486662, 0, 0, 0, 0, 0, 0, 0, 0, 0,
}}
View Source 
var CryptoEngines = cryptoEngines{
	&Ed25519CryptoEngine{},
	&Ed25519CryptoEngine{},
}
View Source 
var Ed25519Curve = &ed25519Curve{}
View Source 
var Ed25519Field = ed25519Field{
	Ed25519Field_P(),
	*(Ed25519Field_ZERO()),
	*(Ed25519Field_ONE()),
	*(Ed25519Field_TWO()),
	*(Ed25519Field_D()),
	*(Ed25519Field_D_Times_TWO()),

	*((&Ed25519EncodedFieldElement{Ed25519Field_ZERO_SHORT(), utils.MustHexDecodeString(Ed25519FieldI)}).Decode()),
}
View Source 
var Ed25519Group = &ed25519Group{}

Ed25519Groupp

View Source 
var MathUtils mathUtils
View Source 
var SqrtM1 = &Ed25519FieldElement{[]intRaw{
	-32595792, -7943725, 9377950, 3500415, 12389472, -272473, -25146209, -2005654, 326686, 11406482,
}}

Functions

func BigInteger_ONE 

func BigInteger_ONE() *big.Int

func BigInteger_ZERO 

func BigInteger_ZERO() *big.Int

src/test/java/io/nem/core/crypto/ed25519/arithmetic/MathUtils.java

func Ed25519Field_P 

func Ed25519Field_P() *big.Int

P: 2^255 - 19

func Ed25519Field_ZERO_LONG 

func Ed25519Field_ZERO_LONG() []byte

func Ed25519Field_ZERO_SHORT 

func Ed25519Field_ZERO_SHORT() []byte

func HashesRipemd160 

func HashesRipemd160(b []byte) ([]byte, error)

func HashesSha3_256 

func HashesSha3_256(b []byte) ([]byte, error)

func HashesSha3_512 

func HashesSha3_512(inputs ...[]byte) ([]byte, error)

func IsConstantTimeByteEq 

func IsConstantTimeByteEq(b, c int) int

func XMul_YModInverseAndMod_P 

func XMul_YModInverseAndMod_P(x *big.Int, y *big.Int) *big.Int

Types

type AESEngine 

type AESEngine struct{}

func NewAESEngine 

func NewAESEngine() *AESEngine

type BlockCipher 

type BlockCipher interface {
	// Encrypts an arbitrarily-sized message (input).
	Encrypt(input []byte) []byte
	// Decrypts an arbitrarily-sized message.
	//return The decrypted message or nil if decryption failed.
	Decrypt(input []byte) []byte
}

BlockCipher Interface for encryption and decryption of data.

type BufferedBlockCipher 

type BufferedBlockCipher struct {
	// contains filtered or unexported fields
}

func NewPaddedBufferedBlockCipher 

func NewPaddedBufferedBlockCipher(block *CBCBlockCipher, padding *PKCS7Padding) *BufferedBlockCipher

func (*BufferedBlockCipher) GetOutputSize 

func (ref *BufferedBlockCipher) GetOutputSize(length int) int

type CBCBlockCipher 

type CBCBlockCipher struct {
	// contains filtered or unexported fields
}

func NewCBCBlockCipher 

func NewCBCBlockCipher(aes *AESEngine) *CBCBlockCipher

type Cipher 

type Cipher struct {
	// contains filtered or unexported fields
}

Cipher Wraps IES encryption and decryption logic.

func NewCipher 

func NewCipher(senderKeyPair *KeyPair, recipientKeyPair *KeyPair, engine CryptoEngine) *Cipher

NewCipher creates a cipher around a sender KeyPair and recipient KeyPair. if engine not present - use CryptoEngines.DefaultEngine insend The sender KeyPair. The sender'S private key is required for encryption. The recipient KeyPair. The recipient'S private key is required for decryption.

func NewCipherFromCipher 

func NewCipherFromCipher(cipher BlockCipher) *Cipher

NewCipherFromCipher creates a cipher around a cipher.

func (*Cipher) Decrypt 

func (ref *Cipher) Decrypt(input []byte) []byte

func (*Cipher) Encrypt 

func (ref *Cipher) Encrypt(input []byte) []byte

type CipherParameters 

type CipherParameters struct {
	// contains filtered or unexported fields
}

func NewParametersWithIV 

func NewParametersWithIV(keyParam *KeyParameter, buf []byte) *CipherParameters

type CoordinateSystem 

type CoordinateSystem int

CoordinateSystem Available coordinate systems for a group element. 

const (
	// Affine coordinate system (x, y).
	AFFINE CoordinateSystem = iota
	// Projective coordinate system (X:Y:Z) satisfying x=X/Z, y=Y/Z.
	P2
	// Extended projective coordinate system (X:Y:Z:T) satisfying x=X/Z, y=Y/Z, XY=ZT.
	P3
	// Completed coordinate system ((X:Z), (Y:T)) satisfying x=X/Z, y=Y/T.
	P1xP1
	// Precomputed coordinate system (y+x, y-x, 2dxy).
	PRECOMPUTED
	// Cached coordinate system (Y+X, Y-X, Z, 2dT).
	CACHED
)

type CryptoEngine 

type CryptoEngine interface {

	// Return The underlying curve.
	GetCurve() Curve
	// Creates a DSA signer.
	CreateDsaSigner(keyPair *KeyPair) DsaSigner
	// Creates a key generator.
	CreateKeyGenerator() KeyGenerator
	//Creates a block cipher.
	CreateBlockCipher(senderKeyPair *KeyPair, recipientKeyPair *KeyPair) BlockCipher
	// Creates a key analyzer.
	CreateKeyAnalyzer() KeyAnalyzer
}

CryptoEngine Represents a cryptographic engine that is a factory of crypto-providers.

type Curve 

type Curve interface {

	/**
	 * Gets the name of the curve.
	 *
	 * @return The name of the curve.
	 */
	GetName() string
	/**
	 * Gets the group order.
	 *
	 * @return The group order.
	 */
	GetGroupOrder() *big.Int
	/**
	 * Gets the group order / 2.
	 *
	 * @return The group order / 2.
	 */
	GetHalfGroupOrder() uint64
}

Curve Interface for getting information for a curve.

type DsaSigner 

type DsaSigner interface {

	// Signs the SHA3 hash of an arbitrarily sized message.
	Sign(mess []byte) (*Signature, error)
	// Verifies that the signature is valid.
	Verify(mess []byte, signature *Signature) bool
	// Determines if the signature is canonical.
	IsCanonicalSignature(signature *Signature) bool
	// Makes ref signature canonical.
	MakeSignatureCanonical(signature *Signature) (*Signature, error)
}

DsaSigner Interface that supports signing and verification of arbitrarily sized message.

type Ed25519BlockCipher 

type Ed25519BlockCipher struct {
	// contains filtered or unexported fields
}

Ed25519BlockCipher Implementation of the block cipher for Ed25519.

func NewEd25519BlockCipher 

func NewEd25519BlockCipher(senderKeyPair *KeyPair, recipientKeyPair *KeyPair) *Ed25519BlockCipher

func (*Ed25519BlockCipher) Decrypt 

func (ref *Ed25519BlockCipher) Decrypt(input []byte) []byte

func (*Ed25519BlockCipher) Encrypt 

func (ref *Ed25519BlockCipher) Encrypt(input []byte) []byte

func (*Ed25519BlockCipher) GetSharedKey 

func (ref *Ed25519BlockCipher) GetSharedKey(privateKey *PrivateKey, publicKey *PublicKey, salt []byte) ([]byte, error)

type Ed25519CryptoEngine 

type Ed25519CryptoEngine struct {
}

Ed25519CryptoEngine wraps a cryptographic engine ed25519

func (*Ed25519CryptoEngine) CreateBlockCipher 

func (ref *Ed25519CryptoEngine) CreateBlockCipher(senderKeyPair *KeyPair, recipientKeyPair *KeyPair) BlockCipher

CreateBlockCipher implemented interface CryptoEngine method

func (*Ed25519CryptoEngine) CreateDsaSigner 

func (ref *Ed25519CryptoEngine) CreateDsaSigner(keyPair *KeyPair) DsaSigner

CreateDsaSigner implemented interface CryptoEngine method

func (*Ed25519CryptoEngine) CreateKeyAnalyzer 

func (ref *Ed25519CryptoEngine) CreateKeyAnalyzer() KeyAnalyzer

CreateKeyAnalyzer implemented interface CryptoEngine method

func (*Ed25519CryptoEngine) CreateKeyGenerator 

func (ref *Ed25519CryptoEngine) CreateKeyGenerator() KeyGenerator

CreateKeyGenerator implemented interface CryptoEngine method

func (*Ed25519CryptoEngine) GetCurve 

func (ref *Ed25519CryptoEngine) GetCurve() Curve

GetCurve implemented interface CryptoEngine method

type Ed25519DsaSigner 

type Ed25519DsaSigner struct {
	KeyPair *KeyPair
}

Ed25519DsaSigner implement DSasigned interface with Ed25519 algo

func NewEd25519DsaSigner 

func NewEd25519DsaSigner(keyPair *KeyPair) *Ed25519DsaSigner

NewEd25519DsaSigner creates a Ed25519 DSA signer.

func (*Ed25519DsaSigner) IsCanonicalSignature 

func (ref *Ed25519DsaSigner) IsCanonicalSignature(signature *Signature) bool

func (*Ed25519DsaSigner) MakeSignatureCanonical 

func (ref *Ed25519DsaSigner) MakeSignatureCanonical(signature *Signature) (*Signature, error)

func (*Ed25519DsaSigner) Sign 

func (ref *Ed25519DsaSigner) Sign(mess []byte) (*Signature, error)

func (*Ed25519DsaSigner) Verify 

func (ref *Ed25519DsaSigner) Verify(mess []byte, signature *Signature) (res bool)

Verify reports whether sig is a valid signature of message 'data' by publicKey. It prevent panic inside ed25519.Verify

type Ed25519EncodedFieldElement 

type Ed25519EncodedFieldElement struct {
	Raw []byte
	// contains filtered or unexported fields
}

Ed25519EncodedFieldElement Represents a field element of the finite field with p=2^255-19 elements. * The value of the field element is held in 2^8 bit representation, i.e. in a byte array. * The length of the array must be 32 or 64.

func NewEd25519EncodedFieldElement 

func NewEd25519EncodedFieldElement(Raw []byte) (*Ed25519EncodedFieldElement, error)

NewEd25519EncodedFieldElement creates a new encoded field element. Raw must to have leght 32 or 64 bytes

func PrepareForScalarMultiply 

func PrepareForScalarMultiply(key *PrivateKey) *Ed25519EncodedFieldElement

func (*Ed25519EncodedFieldElement) Decode 

func (ref *Ed25519EncodedFieldElement) Decode() *Ed25519FieldElement

*

  • Decodes ref encoded (32 byte) representation to a field element in its 10 byte 2^25.5 representation.
  • The most significant bit is discarded. *
  • @return The field element in its 2^25.5 bit representation.

func (*Ed25519EncodedFieldElement) Equals 

func (ref *Ed25519EncodedFieldElement) Equals(ge *Ed25519EncodedFieldElement) bool

func (*Ed25519EncodedFieldElement) IsNegative 

func (ref *Ed25519EncodedFieldElement) IsNegative() bool

IsNegative Return true if ref is in {1,3,5,...,q-2} 

Return false if ref is in {0,2,4,...,q-1}

* Preconditions: * |x| bounded by 1.1*2^26,1.1*2^25,1.1*2^26,1.1*2^25,etc. * * @return true if ref is in {1,3,5,...,q-2}, false otherwise.

func (*Ed25519EncodedFieldElement) IsNonZero 

func (ref *Ed25519EncodedFieldElement) IsNonZero() bool

func (*Ed25519EncodedFieldElement) String 

func (ref *Ed25519EncodedFieldElement) String() string

type Ed25519EncodedGroupElement 

type Ed25519EncodedGroupElement struct {
	Raw []byte
}

Ed25519EncodedGroupElement

func NewEd25519EncodedGroupElement 

func NewEd25519EncodedGroupElement(Raw []byte) (*Ed25519EncodedGroupElement, error)

NewEd25519EncodedGroupElement creates a new encoded group element.

func (*Ed25519EncodedGroupElement) Decode 

func (ref *Ed25519EncodedGroupElement) Decode() (*Ed25519GroupElement, error)

Decode Decodes ref encoded group element and returns a new group element in P3 coordinates.

func (*Ed25519EncodedGroupElement) Equals 

func (ref *Ed25519EncodedGroupElement) Equals(ge *Ed25519EncodedGroupElement) bool

func (*Ed25519EncodedGroupElement) GetAffineX 

func (ref *Ed25519EncodedGroupElement) GetAffineX() (*Ed25519FieldElement, error)

GetAffineX gets the affine x-coordinate. * x is recovered in the following way (p = field size): * <br> * x = sign(x) * sqrt((y^2 - 1) / (d * y^2 + 1)) = sign(x) * sqrt(u / v) with u = y^2 - 1 and v = d * y^2 + 1. * Setting ОІ = (u * v^3) * (u * v^7)^((p - 5) / 8) one has ОІ^2 = +-(u / v). * If v * ОІ = -u multiply ОІ with i=sqrt(-1). * Set x := ОІ. * If sign(x) != bit 255 of s then negate x. * @return the affine x-coordinate.

func (*Ed25519EncodedGroupElement) GetAffineY 

func (ref *Ed25519EncodedGroupElement) GetAffineY() (*Ed25519FieldElement, error)

func (*Ed25519EncodedGroupElement) String 

func (ref *Ed25519EncodedGroupElement) String() string

type Ed25519FieldElement 

type Ed25519FieldElement struct {
	Raw []intRaw
}

Ed25519FieldElement Represents a element of the finite field with p=2^255-19 elements. Raw[0] ... Raw[9], represent the integer Raw[0] + 2^26 * Raw[1] + 2^51 * Raw[2] + 2^77 * Raw[3] + 2^102 * Raw[4] + ... + 2^230 * Raw[9]. Bounds on each Raw[i] vary depending on context. This implementation is based on the ref10 implementation of SUPERCOP.

func Ed25519FieldElementSqrt 

func Ed25519FieldElementSqrt(u Ed25519FieldElement, v Ed25519FieldElement) Ed25519FieldElement

Ed25519FieldElementSqrt Calculates and returns one of the square roots of u / v. * x = (u * v^3) * (u * v^7)^((p - 5) / 8) ==> x^2 = +-(u / v). * Note that ref means x can be sqrt(u / v), -sqrt(u / v), +i * sqrt(u / v), -i * sqrt(u / v). * * @param u The nominator of the fraction. * @param v The denominator of the fraction. * @return The square root of u / v.

func Ed25519Field_D 

func Ed25519Field_D() *Ed25519FieldElement

func Ed25519Field_D_Times_TWO 

func Ed25519Field_D_Times_TWO() *Ed25519FieldElement

func Ed25519Field_ONE 

func Ed25519Field_ONE() *Ed25519FieldElement

func Ed25519Field_TWO 

func Ed25519Field_TWO() *Ed25519FieldElement

func Ed25519Field_ZERO 

func Ed25519Field_ZERO() *Ed25519FieldElement

func NewEd25519FieldElement 

func NewEd25519FieldElement(Raw []intRaw) (*Ed25519FieldElement, error)

NewEd25519FieldElement Creates a field element. Raw The 2^25.5 bit representation of the field element.

func (Ed25519FieldElement) Encode 

func (ref Ed25519FieldElement) Encode() *Ed25519EncodedFieldElement

func (*Ed25519FieldElement) Equals 

func (ref *Ed25519FieldElement) Equals(ge *Ed25519FieldElement) bool

func (Ed25519FieldElement) IsNegative 

func (ref Ed25519FieldElement) IsNegative() bool

func (Ed25519FieldElement) IsNonZero 

func (ref Ed25519FieldElement) IsNonZero() bool

IsNonZero gets a value indicating whether or not the field element is non-zero.

func (*Ed25519FieldElement) String 

func (ref *Ed25519FieldElement) String() string

type Ed25519GroupElement 

type Ed25519GroupElement struct {
	X *Ed25519FieldElement

	Y *Ed25519FieldElement

	Z *Ed25519FieldElement

	T *Ed25519FieldElement
	// contains filtered or unexported fields
}

*

  • A point on the ED25519 curve which represents a group element.
  • This implementation is based on the ref10 implementation of SUPERCOP.
  • <br>
  • Literature:
  • [1] Daniel J. Bernstein, Niels Duif, Tanja Lange, Peter Schwabe and Bo-Yin Yang : High-speed high-security signatures
  • [2] Huseyin Hisil, Kenneth Koon-Ho Wong, Gary Carter, Ed Dawson: Twisted Edwards Curves Revisited
  • [3] Daniel J. Bernsteina, Tanja Lange: A complete set of addition laws for incomplete Edwards curves
  • [4] Daniel J. Bernstein, Peter Birkner, Marc Joye, Tanja Lange and Christiane Peters: Twisted Edwards Curves
  • [5] Christiane Pascale Peters: Curves, Codes, and Cryptography (PhD thesis)
  • [6] Daniel J. Bernstein, Peter Birkner, Tanja Lange and Christiane Peters: Optimizing float64-base elliptic-curve single-scalar multiplication

Ed25519GroupElement

func NewEd25519GroupElement 

func NewEd25519GroupElement(coordinateSystem CoordinateSystem,
	x *Ed25519FieldElement,
	y *Ed25519FieldElement,
	z *Ed25519FieldElement,
	t *Ed25519FieldElement) *Ed25519GroupElement

NewEd25519GroupElement creates a group element for a curve.

func NewEd25519GroupElementAffine 

func NewEd25519GroupElementAffine(
	x *Ed25519FieldElement,
	y *Ed25519FieldElement,
	z *Ed25519FieldElement) *Ed25519GroupElement

NewEd25519GroupElementAffine creates a new group element using the AFFINE coordinate system.

func NewEd25519GroupElementCached 

func NewEd25519GroupElementCached(
	x *Ed25519FieldElement,
	y *Ed25519FieldElement,
	z *Ed25519FieldElement,
	t *Ed25519FieldElement) *Ed25519GroupElement

NewEd25519GroupElementCached сreates a new group element using the CACHED coordinate system. (CoordinateSystem.CACHED, YPlusX, YMinusX, Z, T2d)

func NewEd25519GroupElementP1XP1 

func NewEd25519GroupElementP1XP1(
	x *Ed25519FieldElement,
	y *Ed25519FieldElement,
	z *Ed25519FieldElement,
	t *Ed25519FieldElement) *Ed25519GroupElement

NewEd25519GroupElementP1XP1 Creates a new group element using the P1xP1 coordinate system.

func NewEd25519GroupElementP2 

func NewEd25519GroupElementP2(
	x *Ed25519FieldElement,
	y *Ed25519FieldElement,
	z *Ed25519FieldElement) *Ed25519GroupElement

NewEd25519GroupElementP2 creates a new group element using the P2 coordinate system.

func NewEd25519GroupElementP3 

func NewEd25519GroupElementP3(
	x *Ed25519FieldElement,
	y *Ed25519FieldElement,
	z *Ed25519FieldElement,
	t *Ed25519FieldElement) *Ed25519GroupElement

NewEd25519GroupElementP3 creates a new group element using the P3 coordinate system.

func NewEd25519GroupElementPrecomputed 

func NewEd25519GroupElementPrecomputed(
	x *Ed25519FieldElement,
	y *Ed25519FieldElement,
	z *Ed25519FieldElement) *Ed25519GroupElement

NewEd25519GroupElementPrecomputed сreates a new group element using the PRECOMPUTED coordinate system. (CoordinateSystem.PRECOMPUTED, yPlusx, yMinusx, xy2d, nil)

func (*Ed25519GroupElement) Encode 

func (ref *Ed25519GroupElement) Encode() (*Ed25519EncodedGroupElement, error)

Converts the group element to an encoded point on the curve. * * @return The encoded point as byte array.

func (*Ed25519GroupElement) Equals 

func (ref *Ed25519GroupElement) Equals(ge *Ed25519GroupElement) (res bool)

func (*Ed25519GroupElement) GetCoordinateSystem 

func (ref *Ed25519GroupElement) GetCoordinateSystem() CoordinateSystem

func (*Ed25519GroupElement) GetT 

func (ref *Ed25519GroupElement) GetT() *Ed25519FieldElement

func (*Ed25519GroupElement) GetX 

func (ref *Ed25519GroupElement) GetX() *Ed25519FieldElement

func (*Ed25519GroupElement) GetY 

func (ref *Ed25519GroupElement) GetY() *Ed25519FieldElement

func (*Ed25519GroupElement) GetZ 

func (ref *Ed25519GroupElement) GetZ() *Ed25519FieldElement

func (*Ed25519GroupElement) IsPrecomputedForDoubleScalarMultiplication 

func (ref *Ed25519GroupElement) IsPrecomputedForDoubleScalarMultiplication() bool

*

  • Gets a value indicating whether or not the group element has a
  • precomputed table for float64 scalar multiplication. *
  • @return true if it has the table, false otherwise.

func (*Ed25519GroupElement) PrecomputeForDoubleScalarMultiplication 

func (ref *Ed25519GroupElement) PrecomputeForDoubleScalarMultiplication()

PrecomputeForDoubleScalarMultiplication Precomputes the group elements used to speed up a float64 scalar multiplication.

func (*Ed25519GroupElement) PrecomputeForScalarMultiplication 

func (ref *Ed25519GroupElement) PrecomputeForScalarMultiplication()

PrecomputeForScalarMultiplication precomputes the group elements needed to speed up a scalar multiplication.

func (*Ed25519GroupElement) SatisfiesCurveEquation 

func (ref *Ed25519GroupElement) SatisfiesCurveEquation() bool

SatisfiesCurveEquation Verify that the group element satisfies the curve equation. * @return true if the group element satisfies the curve equation, false otherwise.

func (*Ed25519GroupElement) Select 

func (ref *Ed25519GroupElement) Select(pos int, b int) (*Ed25519GroupElement, error)

func (*Ed25519GroupElement) String 

func (ref *Ed25519GroupElement) String() string

type Ed25519KeyAnalyzer 

type Ed25519KeyAnalyzer struct {
}

func NewEd25519KeyAnalyzer 

func NewEd25519KeyAnalyzer() *Ed25519KeyAnalyzer

func (*Ed25519KeyAnalyzer) IsKeyCompressed 

func (ref *Ed25519KeyAnalyzer) IsKeyCompressed(publicKey *PublicKey) bool

type Ed25519KeyGenerator 

type Ed25519KeyGenerator struct {
}

Ed25519KeyGenerator Implementation of the key generator for Ed25519.

func NewEd25519KeyGenerator 

func NewEd25519KeyGenerator() *Ed25519KeyGenerator

func (*Ed25519KeyGenerator) DerivePublicKey 

func (ref *Ed25519KeyGenerator) DerivePublicKey(privateKey *PrivateKey) *PublicKey

func (*Ed25519KeyGenerator) GenerateKeyPair 

func (ref *Ed25519KeyGenerator) GenerateKeyPair() (*KeyPair, error)

GenerateKeyPair generate key pair use ed25519.GenerateKey

type KeyAnalyzer 

type KeyAnalyzer interface {
	// Gets a Value indicating whether or not the public key is compressed.
	IsKeyCompressed(publicKey *PublicKey) bool
}

KeyAnalyzer Interface to analyze keys.

type KeyGenerator 

type KeyGenerator interface {
	// Creates a random key pair.
	GenerateKeyPair() (*KeyPair, error)
	// Derives a public key from a private key.
	DerivePublicKey(privateKey *PrivateKey) *PublicKey
}

KeyGenerator Interface for generating keys.

type KeyPair 

type KeyPair struct {
	*PrivateKey
	*PublicKey
}

KeyPair represent the pair of keys - private & public

func NewKeyPair 

func NewKeyPair(privateKey *PrivateKey, publicKey *PublicKey, engine CryptoEngine) (*KeyPair, error)

NewKeyPair The public key is calculated from the private key. 

The private key must by nil

if crypto engine is nil - default Engine

func NewKeyPairByEngine 

func NewKeyPairByEngine(engine CryptoEngine) (*KeyPair, error)

NewKeyPairByEngine creates a random key pair that is compatible with the specified engine.

func NewRandomKeyPair 

func NewRandomKeyPair() (*KeyPair, error)

NewRandomKeyPair creates a random key pair.

func (*KeyPair) HasPrivateKey 

func (ref *KeyPair) HasPrivateKey() bool

HasPrivateKey Determines if the current key pair has a private key.

type KeyParameter 

type KeyParameter struct {
	// contains filtered or unexported fields
}

func NewKeyParameter 

func NewKeyParameter(buf []byte) *KeyParameter

type PKCS7Padding 

type PKCS7Padding struct {
}

func NewPKCS7Padding 

func NewPKCS7Padding() *PKCS7Padding

type PrivateKey 

type PrivateKey struct {
	Raw []byte
	// contains filtered or unexported fields
}

PrivateKey Represents a private key.

func NewPrivateKey 

func NewPrivateKey(raw []byte) *PrivateKey

NewPrivateKey creates a new private key from []byte

func NewPrivateKeyfromBigInt 

func NewPrivateKeyfromBigInt(val *big.Int) *PrivateKey

NewPrivateKey creates a new private key from []byte

func NewPrivateKeyfromDecimalString 

func NewPrivateKeyfromDecimalString(decimal string) (*PrivateKey, error)

PrivateKeyfromDecimalString creates a private key from a decimal strings.

func NewPrivateKeyfromHexString 

func NewPrivateKeyfromHexString(sHex string) (*PrivateKey, error)

PrivatKeyfromHexString creates a private key from a hex strings.

func (*PrivateKey) String 

func (ref *PrivateKey) String() string

type PublicKey 

type PublicKey struct {
	Raw []byte
}

PublicKey Represents a public key.

func NewPublicKey 

func NewPublicKey(raw []byte) *PublicKey

NewPublicKey creates a new public key.

func NewPublicKeyfromHex 

func NewPublicKeyfromHex(hStr string) (*PublicKey, error)

func (*PublicKey) String 

func (ref *PublicKey) String() string

type Signature 

type Signature struct {
	R []byte
	S []byte
}

Signature

func NewSignature 

func NewSignature(r []byte, s []byte) (*Signature, error)

NewSignature R and S must fit into 32 bytes

func NewSignatureFromBigInt 

func NewSignatureFromBigInt(rInt, sInt *big.Int) (*Signature, error)

func NewSignatureFromBytes 

func NewSignatureFromBytes(b []byte) (*Signature, error)

NewSignatureFromBytes Creates a new signature from bytes array 64

func (*Signature) Bytes 

func (ref *Signature) Bytes() []byte

Bytes Gets a little-endian 64-byte representation of the signature.

func (*Signature) GetR 

func (ref *Signature) GetR() *big.Int

*

  • Gets the R-part of the signature. *
  • @return The R-part of the signature.

func (*Signature) GetS 

func (ref *Signature) GetS() *big.Int

GetS Gets the S-part of the signature.

func (*Signature) String 

func (ref *Signature) String() string

type Signer 

type Signer struct {
	// contains filtered or unexported fields
}

Signer wraps DSA signing and verification logic.

func NewSigner 

func NewSigner(signer DsaSigner) *Signer

NewSignerFromDsaSigner Creates a signer around a DsaSigner.

func NewSignerFromKeyPair 

func NewSignerFromKeyPair(keyPair *KeyPair, engine CryptoEngine) *Signer

NewSigner creates a signer around a KeyPair.

func (*Signer) IsCanonicalSignature 

func (ref *Signer) IsCanonicalSignature(signature *Signature) bool

IsCanonicalSignature implemented interface DsaSigner method

func (*Signer) MakeSignatureCanonical 

func (ref *Signer) MakeSignatureCanonical(signature *Signature) (*Signature, error)

MakeSignatureCanonical implemented interface DsaSigner method

func (*Signer) Sign 

func (ref *Signer) Sign(data []byte) (*Signature, error)

Sign implemented interface DsaSigner method

func (*Signer) Verify 

func (ref *Signer) Verify(data []byte, signature *Signature) bool

Verify implemented interface DsaSigner method

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