/
keys.go
252 lines (212 loc) · 6.24 KB
/
keys.go
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// Copyright Fuzamei Corp. 2018 All Rights Reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package utils
import (
"crypto/ecdsa"
"crypto/elliptic"
"crypto/rand"
"crypto/x509"
"encoding/asn1"
"encoding/pem"
"fmt"
pkecdsa "github.com/assetcloud/chain/system/crypto/secp256r1"
pkesm2 "github.com/assetcloud/chain/system/crypto/sm2"
"github.com/assetcloud/plugin/plugin/dapp/evm/executor/vm/common"
"github.com/pkg/errors"
"github.com/tjfoc/gmsm/sm2"
)
type pkcs8Info struct {
Version int
PrivateKeyAlgorithm []asn1.ObjectIdentifier
PrivateKey []byte
}
type ecPrivateKey struct {
Version int
PrivateKey []byte
NamedCurveOID asn1.ObjectIdentifier `asn1:"optional,explicit,tag:0"`
PublicKey asn1.BitString `asn1:"optional,explicit,tag:1"`
}
var (
oidNamedCurveP256 = asn1.ObjectIdentifier{1, 2, 840, 10045, 3, 1, 7}
)
var oidPublicKeyECDSA = asn1.ObjectIdentifier{1, 2, 840, 10045, 2, 1}
func oidFromNamedCurve(curve elliptic.Curve) (asn1.ObjectIdentifier, bool) {
switch curve {
case elliptic.P256():
return oidNamedCurveP256, true
}
return nil, false
}
func PrivateKeyToByte(privateKey interface{}) ([]byte, error) {
if privateKey == nil {
return nil, errors.New("Invalid key. It must be different from nil")
}
switch k := privateKey.(type) {
case *ecdsa.PrivateKey:
return []byte(common.Bytes2Hex(pkecdsa.SerializePrivateKey(k))), nil
case *sm2.PrivateKey:
return []byte(common.Bytes2Hex(pkesm2.SerializePrivateKey(k))), nil
default:
return nil, errors.New("Invalid key type. It must be *ecdsa.PrivateKey or *rsa.PrivateKey")
}
}
// PrivateKeyToPEM 私钥转pem
func PrivateKeyToPEM(privateKey interface{}, pwd []byte) ([]byte, error) {
if len(pwd) != 0 {
return privateKeyToEncryptedPEM(privateKey, pwd)
}
if privateKey == nil {
return nil, errors.New("Invalid key. It must be different from nil")
}
switch k := privateKey.(type) {
case *ecdsa.PrivateKey:
if k == nil {
return nil, errors.New("Invalid ecdsa private key. It must be different from nil")
}
oidNamedCurve, ok := oidFromNamedCurve(k.Curve)
if !ok {
return nil, errors.New("unknown elliptic curve")
}
privateKeyBytes := k.D.Bytes()
paddedPrivateKey := make([]byte, (k.Curve.Params().N.BitLen()+7)/8)
copy(paddedPrivateKey[len(paddedPrivateKey)-len(privateKeyBytes):], privateKeyBytes)
asn1Bytes, err := asn1.Marshal(ecPrivateKey{
Version: 1,
PrivateKey: paddedPrivateKey,
PublicKey: asn1.BitString{Bytes: elliptic.Marshal(k.Curve, k.X, k.Y)},
})
if err != nil {
return nil, fmt.Errorf("error marshaling EC key to asn1 [%s]", err)
}
var pkcs8Key pkcs8Info
pkcs8Key.Version = 0
pkcs8Key.PrivateKeyAlgorithm = make([]asn1.ObjectIdentifier, 2)
pkcs8Key.PrivateKeyAlgorithm[0] = oidPublicKeyECDSA
pkcs8Key.PrivateKeyAlgorithm[1] = oidNamedCurve
pkcs8Key.PrivateKey = asn1Bytes
pkcs8Bytes, err := asn1.Marshal(pkcs8Key)
if err != nil {
return nil, fmt.Errorf("error marshaling EC key to asn1 [%s]", err)
}
return pem.EncodeToMemory(
&pem.Block{
Type: "PRIVATE KEY",
Bytes: pkcs8Bytes,
},
), nil
case *sm2.PrivateKey:
if k == nil {
return nil, errors.New("Invalid sm2 private key. It must be different from nil")
}
return sm2.WritePrivateKeytoMem(k, nil)
default:
return nil, errors.New("Invalid key type. It must be *ecdsa.PrivateKey or *rsa.PrivateKey")
}
}
func privateKeyToEncryptedPEM(privateKey interface{}, pwd []byte) ([]byte, error) {
if privateKey == nil {
return nil, errors.New("Invalid private key. It must be different from nil")
}
switch k := privateKey.(type) {
case *ecdsa.PrivateKey:
if k == nil {
return nil, errors.New("Invalid ecdsa private key. It must be different from nil")
}
raw, err := x509.MarshalECPrivateKey(k)
if err != nil {
return nil, err
}
block, err := x509.EncryptPEMBlock(
rand.Reader,
"PRIVATE KEY",
raw,
pwd,
x509.PEMCipherAES256)
if err != nil {
return nil, err
}
return pem.EncodeToMemory(block), nil
default:
return nil, errors.New("Invalid key type. It must be *ecdsa.PrivateKey")
}
}
// PublicKeyToPEM 公钥转pem
func PublicKeyToPEM(publicKey interface{}, pwd []byte) ([]byte, error) {
if len(pwd) != 0 {
return publicKeyToEncryptedPEM(publicKey, pwd)
}
if publicKey == nil {
return nil, errors.New("Invalid public key. It must be different from nil")
}
switch k := publicKey.(type) {
case *ecdsa.PublicKey:
if k == nil {
return nil, errors.New("Invalid ecdsa public key. It must be different from nil")
}
PubASN1, err := x509.MarshalPKIXPublicKey(k)
if err != nil {
return nil, err
}
return pem.EncodeToMemory(
&pem.Block{
Type: "PUBLIC KEY",
Bytes: PubASN1,
},
), nil
case *sm2.PublicKey:
if k == nil {
return nil, errors.New("Invalid sm2 public key. It must be different from nil")
}
return sm2.WritePublicKeytoMem(k, nil)
default:
return nil, errors.New("Invalid key type. It must be *ecdsa.PublicKey or *rsa.PublicKey")
}
}
func publicKeyToEncryptedPEM(publicKey interface{}, pwd []byte) ([]byte, error) {
if publicKey == nil {
return nil, errors.New("Invalid public key. It must be different from nil")
}
if len(pwd) == 0 {
return nil, errors.New("Invalid password. It must be different from nil")
}
switch k := publicKey.(type) {
case *ecdsa.PublicKey:
if k == nil {
return nil, errors.New("Invalid ecdsa public key. It must be different from nil")
}
raw, err := x509.MarshalPKIXPublicKey(k)
if err != nil {
return nil, err
}
block, err := x509.EncryptPEMBlock(
rand.Reader,
"PUBLIC KEY",
raw,
pwd,
x509.PEMCipherAES256)
if err != nil {
return nil, err
}
return pem.EncodeToMemory(block), nil
default:
return nil, errors.New("Invalid key type. It must be *ecdsa.PublicKey")
}
}
// DERToPublicKey DER字符转成公钥
func DERToPublicKey(raw []byte) (pub interface{}, err error) {
if len(raw) == 0 {
return nil, errors.New("Invalid DER. It must be different from nil")
}
key, err := x509.ParsePKIXPublicKey(raw)
if err != nil {
key, err = sm2.ParseSm2PublicKey(raw)
}
return key, err
}
// Clone 克隆结构
func Clone(src []byte) []byte {
clone := make([]byte, len(src))
copy(clone, src)
return clone
}