tendermint: github.com/tendermint/tendermint/crypto/secp256k1 Index | Files

package secp256k1

import "github.com/tendermint/tendermint/crypto/secp256k1"


Package Files

secp256k1.go secp256k1_nocgo.go


const (
    PrivKeyAminoName = "tendermint/PrivKeySecp256k1"
    PubKeyAminoName  = "tendermint/PubKeySecp256k1"


const PubKeySecp256k1Size = 33

PubKeySecp256k1Size is comprised of 32 bytes for one field element (the x-coordinate), plus one byte for the parity of the y-coordinate.

type PrivKeySecp256k1 Uses

type PrivKeySecp256k1 [32]byte

PrivKeySecp256k1 implements PrivKey.

func GenPrivKey Uses

func GenPrivKey() PrivKeySecp256k1

GenPrivKey generates a new ECDSA private key on curve secp256k1 private key. It uses OS randomness to generate the private key.

func GenPrivKeySecp256k1 Uses

func GenPrivKeySecp256k1(secret []byte) PrivKeySecp256k1

GenPrivKeySecp256k1 hashes the secret with SHA2, and uses that 32 byte output to create the private key.

It makes sure the private key is a valid field element by setting:

c = sha256(secret) k = (c mod (n − 1)) + 1, where n = curve order.

NOTE: secret should be the output of a KDF like bcrypt, if it's derived from user input.

func (PrivKeySecp256k1) Bytes Uses

func (privKey PrivKeySecp256k1) Bytes() []byte

Bytes marshalls the private key using amino encoding.

func (PrivKeySecp256k1) Equals Uses

func (privKey PrivKeySecp256k1) Equals(other crypto.PrivKey) bool

Equals - you probably don't need to use this. Runs in constant time based on length of the keys.

func (PrivKeySecp256k1) PubKey Uses

func (privKey PrivKeySecp256k1) PubKey() crypto.PubKey

PubKey performs the point-scalar multiplication from the privKey on the generator point to get the pubkey.

func (PrivKeySecp256k1) Sign Uses

func (privKey PrivKeySecp256k1) Sign(msg []byte) ([]byte, error)

Sign creates an ECDSA signature on curve Secp256k1, using SHA256 on the msg. The returned signature will be of the form R || S (in lower-S form).

type PubKeySecp256k1 Uses

type PubKeySecp256k1 [PubKeySecp256k1Size]byte

PubKeySecp256k1 implements crypto.PubKey. It is the compressed form of the pubkey. The first byte depends is a 0x02 byte if the y-coordinate is the lexicographically largest of the two associated with the x-coordinate. Otherwise the first byte is a 0x03. This prefix is followed with the x-coordinate.

func (PubKeySecp256k1) Address Uses

func (pubKey PubKeySecp256k1) Address() crypto.Address

Address returns a Bitcoin style addresses: RIPEMD160(SHA256(pubkey))

func (PubKeySecp256k1) Bytes Uses

func (pubKey PubKeySecp256k1) Bytes() []byte

Bytes returns the pubkey marshalled with amino encoding.

func (PubKeySecp256k1) Equals Uses

func (pubKey PubKeySecp256k1) Equals(other crypto.PubKey) bool

func (PubKeySecp256k1) String Uses

func (pubKey PubKeySecp256k1) String() string

func (PubKeySecp256k1) VerifyBytes Uses

func (pubKey PubKeySecp256k1) VerifyBytes(msg []byte, sigStr []byte) bool

VerifyBytes verifies a signature of the form R || S. It rejects signatures which are not in lower-S form.

Package secp256k1 imports 10 packages (graph) and is imported by 68 packages. Updated 2019-10-17. Refresh now. Tools for package owners.