BlockChain Crypto

Cryptography Library for BlockChain NetWork

Usage

Key pair

Generate a key pair:

import "github.com/zhaohaijun/blockchain-crypto/keypair"
// Generate key pair
private,public,err:=keypair.GenerateKeyPair(keypair.PK_ECDSA,keypair.P256)

The first arguments indicates the key type used for specific algorithm. Available key types:

PK_ECDSA
PK_SM2
PK_EDDSA

The second argument differs from the key types:

• as for to ECDSA,it indicates the curve which could be one of:

  P224,P256,P384,P521

• as for SM2,it indicates the curve similar to ECDSA but should be SM2P256V1.

• as for EdDSA,it should be ED25519

To serialize/deserialize the public key:

// Serialize public key
public ,err :=keypair.DeserializePublicKey(buf)

##Signature To generate a signature for some message, a private key should be provided as well as a specified signature scheme. Notice that the signature scheme should match the private key.

Supported signture schemes:

SHA224withECDSA
SHA256withECDSA
SHA384withECDSA
SHA512withECDSA
SHA3-224withECDSA
SHA3-256withECDSA
SHA3-384withECDSA
SHA3-512withECDSA
RIPEMD160withECDSA
SM3withSM2
SHA512withEdDSA

To verify a signature, just input the public key as well as the signature with the original message.

import "github.com/zhaohaijun/blockchain-crypto/signature"

// Generate signature for @msg using private key @private
sig, err := signature.Sign(signature.SHA256withECDSA, private, msg, nil)

// Verify the signature using public key @public
ok := signature.Verify(public, msg, sig)

Serialization:

// Serialization
buf, err := signature.Serialize(sig)

// Deserialization
sig, err = signature.Deserialize(buf)