crypto

package
v1.3.1 Latest Latest
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 Go to latest Published: Oct 31, 2015 License: GPL-3.0 Imports: 30 Imported by: 0

Documentation

Index

Constants

View Source 
const (

	// n,r,p = 2^18, 8, 1 uses 256MB memory and approx 1s CPU time on a modern CPU.
	StandardScryptN = 1 << 18
	StandardScryptP = 1

	// n,r,p = 2^12, 8, 6 uses 4MB memory and approx 100ms CPU time on a modern CPU.
	LightScryptN = 1 << 12
	LightScryptP = 6
)

Variables

This section is empty.

Functions

func CreateAddress 

func CreateAddress(b common.Address, nonce uint64) common.Address

Creates an ethereum address given the bytes and the nonce

func Decrypt 

func Decrypt(prv *ecdsa.PrivateKey, ct []byte) ([]byte, error)

func Ecrecover 

func Ecrecover(hash, sig []byte) ([]byte, error)

func Encrypt 

func Encrypt(pub *ecdsa.PublicKey, message []byte) ([]byte, error)

func FromECDSA 

func FromECDSA(prv *ecdsa.PrivateKey) []byte

func FromECDSAPub 

func FromECDSAPub(pub *ecdsa.PublicKey) []byte

func GenerateKey 

func GenerateKey() (*ecdsa.PrivateKey, error)

func HexToECDSA added in v0.9.17 

func HexToECDSA(hexkey string) (*ecdsa.PrivateKey, error)

HexToECDSA parses a secp256k1 private key.

func ImportBlockTestKey added in v0.9.17 

func ImportBlockTestKey(privKeyBytes []byte) error

Used only by block tests.

func LoadECDSA added in v0.9.17 

func LoadECDSA(file string) (*ecdsa.PrivateKey, error)

LoadECDSA loads a secp256k1 private key from the given file. The key data is expected to be hex-encoded.

func PKCS7Unpad added in v0.9.17 

func PKCS7Unpad(in []byte) []byte

From https://leanpub.com/gocrypto/read#leanpub-auto-block-cipher-modes

func PubkeyToAddress added in v0.9.17 

func PubkeyToAddress(p ecdsa.PublicKey) common.Address

func Ripemd160 

func Ripemd160(data []byte) []byte

func SaveECDSA added in v0.9.17 

func SaveECDSA(file string, key *ecdsa.PrivateKey) error

SaveECDSA saves a secp256k1 private key to the given file with restrictive permissions. The key data is saved hex-encoded.

func Sha256 

func Sha256(data []byte) []byte

func Sha3 

func Sha3(data ...[]byte) []byte

func Sha3Hash added in v0.9.17 

func Sha3Hash(data ...[]byte) (h common.Hash)

func SigToPub 

func SigToPub(hash, sig []byte) (*ecdsa.PublicKey, error)

func Sign 

func Sign(hash []byte, prv *ecdsa.PrivateKey) (sig []byte, err error)

func ToECDSA 

func ToECDSA(prv []byte) *ecdsa.PrivateKey

New methods using proper ecdsa keys from the stdlib

func ToECDSAPub 

func ToECDSAPub(pub []byte) *ecdsa.PublicKey

func ValidateSignatureValues added in v0.9.32 

func ValidateSignatureValues(v byte, r, s *big.Int) bool

Types

type BitCurve 

type BitCurve struct {
	P       *big.Int // the order of the underlying field
	N       *big.Int // the order of the base point
	B       *big.Int // the constant of the BitCurve equation
	Gx, Gy  *big.Int // (x,y) of the base point
	BitSize int      // the size of the underlying field
}

A BitCurve represents a Koblitz Curve with a=0. See http://www.hyperelliptic.org/EFD/g1p/auto-shortw.html

func S160 

func S160() *BitCurve

S160 returns a BitCurve which implements secp160k1 (see SEC 2 section 2.4.1)

func S192 

func S192() *BitCurve

S192 returns a BitCurve which implements secp192k1 (see SEC 2 section 2.5.1)

func S224 

func S224() *BitCurve

S224 returns a BitCurve which implements secp224k1 (see SEC 2 section 2.6.1)

func S256 

func S256() *BitCurve

S256 returns a BitCurve which implements secp256k1 (see SEC 2 section 2.7.1)

func (*BitCurve) Add 

func (BitCurve *BitCurve) Add(x1, y1, x2, y2 *big.Int) (*big.Int, *big.Int)

Add returns the sum of (x1,y1) and (x2,y2)

func (*BitCurve) Double 

func (BitCurve *BitCurve) Double(x1, y1 *big.Int) (*big.Int, *big.Int)

Double returns 2*(x,y)

func (*BitCurve) GenerateKey 

func (BitCurve *BitCurve) GenerateKey(rand io.Reader) (priv []byte, x, y *big.Int, err error)

TODO: double check if it is okay GenerateKey returns a public/private key pair. The private key is generated using the given reader, which must return random data.

func (*BitCurve) IsOnCurve 

func (BitCurve *BitCurve) IsOnCurve(x, y *big.Int) bool

IsOnBitCurve returns true if the given (x,y) lies on the BitCurve.

func (*BitCurve) Marshal 

func (BitCurve *BitCurve) Marshal(x, y *big.Int) []byte

Marshal converts a point into the form specified in section 4.3.6 of ANSI X9.62.

func (*BitCurve) Params 

func (BitCurve *BitCurve) Params() *elliptic.CurveParams

func (*BitCurve) ScalarBaseMult 

func (BitCurve *BitCurve) ScalarBaseMult(k []byte) (*big.Int, *big.Int)

ScalarBaseMult returns k*G, where G is the base point of the group and k is an integer in big-endian form.

func (*BitCurve) ScalarMult 

func (BitCurve *BitCurve) ScalarMult(Bx, By *big.Int, k []byte) (*big.Int, *big.Int)

TODO: double check if it is okay ScalarMult returns k*(Bx,By) where k is a number in big-endian form.

func (*BitCurve) Unmarshal 

func (BitCurve *BitCurve) Unmarshal(data []byte) (x, y *big.Int)

Unmarshal converts a point, serialised by Marshal, into an x, y pair. On error, x = nil.

type Key added in v0.9.17 

type Key struct {
	Id uuid.UUID // Version 4 "random" for unique id not derived from key data
	// to simplify lookups we also store the address
	Address common.Address
	// we only store privkey as pubkey/address can be derived from it
	// privkey in this struct is always in plaintext
	PrivateKey *ecdsa.PrivateKey
}

func GenerateNewKeyDefault added in v0.9.17 

func GenerateNewKeyDefault(ks KeyStore, rand io.Reader, auth string) (key *Key, err error)

func ImportPreSaleKey added in v0.9.17 

func ImportPreSaleKey(keyStore KeyStore, keyJSON []byte, password string) (*Key, error)

creates a Key and stores that in the given KeyStore by decrypting a presale key JSON

func NewKey added in v0.9.17 

func NewKey(rand io.Reader) *Key

func NewKeyForDirectICAP added in v1.3.1 

func NewKeyForDirectICAP(rand io.Reader) *Key

generate key whose address fits into < 155 bits so it can fit into the Direct ICAP spec. for simplicity and easier compatibility with other libs, we retry until the first byte is 0.

func NewKeyFromECDSA added in v0.9.17 

func NewKeyFromECDSA(privateKeyECDSA *ecdsa.PrivateKey) *Key

func (*Key) MarshalJSON added in v0.9.17 

func (k *Key) MarshalJSON() (j []byte, err error)

func (*Key) UnmarshalJSON added in v0.9.17 

func (k *Key) UnmarshalJSON(j []byte) (err error)

type KeyStore 

type KeyStore interface {
	// create new key using io.Reader entropy source and optionally using auth string
	GenerateNewKey(io.Reader, string) (*Key, error)
	GetKey(common.Address, string) (*Key, error) // get key from addr and auth string
	GetKeyAddresses() ([]common.Address, error)  // get all addresses
	StoreKey(*Key, string) error                 // store key optionally using auth string
	DeleteKey(common.Address, string) error      // delete key by addr and auth string
	Cleanup(keyAddr common.Address) (err error)
}

func NewKeyStorePassphrase added in v0.9.17 

func NewKeyStorePassphrase(path string, scryptN int, scryptP int) KeyStore

func NewKeyStorePlain added in v0.9.17 

func NewKeyStorePlain(path string) KeyStore

Source Files

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Directories

Path Synopsis
Package sha3 implements the SHA3 hash algorithm (formerly called Keccak) chosen by NIST in 2012.
 Package sha3 implements the SHA3 hash algorithm (formerly called Keccak) chosen by NIST in 2012.

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