加密调整

This commit is contained in:
李子铭 2025-03-24 19:55:53 +08:00
parent 721808e543
commit 2af26fb728
8 changed files with 2203 additions and 19 deletions

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@ -1,19 +0,0 @@
package cmb
import (
sm22 "voucher/internal/pkg/cmb/sm2"
)
type Smx struct {
Sm *sm22.Sm2
}
func NewSmx(privateKey, publicKey string) (*Smx, error) {
return &Smx{
Sm: sm22.NewSm2().SetHexPrivateKey(privateKey).SetHexPublicKey(publicKey),
}, nil
}
func (s *Smx) Sign(input string) {
}

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package model
import (
"crypto/elliptic"
"math/big"
)
var (
One = new(big.Int).SetInt64(1)
DefaultUid = []byte{0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38}
VerifyFalse = []byte{0x30}
VerifyTrue = []byte{0x31}
)
type CipherType int32
const (
C1C2C3 CipherType = 1
C1C3C2 CipherType = 2
)
type PublicKey struct {
elliptic.Curve
X, Y *big.Int
}
type PrivateKey struct {
*PublicKey
D *big.Int
}
type Signature struct {
R, S *big.Int
}

387
internal/pkg/cmbv2/sm2.go Normal file
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package cmbv2
import (
"bytes"
"crypto/elliptic"
"crypto/rand"
"encoding/asn1"
"encoding/base64"
"encoding/hex"
"fmt"
"github.com/ZZMarquis/gm/sm4"
"io"
"math/big"
"strings"
"voucher/internal/pkg/cmb/sm2/sdk"
"voucher/internal/pkg/cmbv2/model"
"voucher/internal/pkg/cmbv2/utils"
)
type Cmb struct {
publicKey *model.PublicKey
privateKey *model.PrivateKey
cipherType model.CipherType
c3Len int
uid []byte
sdk sdk.SDK
sm2P256 *utils.Sm2P256Curve
}
func NewCmb(privateKey, sopPublicKey string) (*Cmb, error) {
cmb := &Cmb{
c3Len: 32,
uid: model.DefaultUid,
cipherType: model.C1C3C2,
sdk: sdk.NewBaseSdk(),
}
sm2P256 := utils.NewP256Sm2()
cmb.sm2P256 = &sm2P256
if err := cmb.setHexPrivateKey(privateKey); err != nil {
return nil, err
}
if err := cmb.setHexPublicKey(sopPublicKey); err != nil {
return nil, err
}
return cmb, nil
}
func (s *Cmb) setHexPublicKey(hexStr string) error {
d, err := hex.DecodeString(hexStr)
if err != nil {
return fmt.Errorf("publicKey is not hex string: %s", err.Error())
}
s.publicKey, err = utils.HexToPublicKey(s.sm2P256, d)
if err != nil {
return fmt.Errorf("parse publicKey err: %+v", err)
}
return nil
}
func (s *Cmb) setHexPrivateKey(hexStr string) error {
d, err := hex.DecodeString(hexStr)
if err != nil {
return fmt.Errorf("privateKey is not hex string: %s", err.Error())
}
s.privateKey, err = utils.HexToPrivateKey(s.sm2P256, d)
if err != nil {
return fmt.Errorf("parse privateKey err: %+v", err)
}
return nil
}
func (s *Cmb) Encrypt(input []byte) (string, error) {
if input == nil {
return "", fmt.Errorf("加密元数据 is empty")
}
sm4Key := utils.GenerateSM4Key()
iv := utils.GetSM4IV()
encryptedBody, err := sm4.CBCEncrypt(sm4Key, iv, utils.Padding(input, 1))
keyAndIv := utils.AssemblingByteArray(sm4Key, iv)
data := []byte(base64.StdEncoding.EncodeToString(keyAndIv))
kvTmp, err := s.encrypt(data)
if err != nil {
return "", err
}
return fmt.Sprintf("%s|%s", base64.StdEncoding.EncodeToString([]byte(kvTmp)), base64.StdEncoding.EncodeToString(encryptedBody)), nil
}
func (s *Cmb) encrypt(data []byte) ([]byte, error) {
c2 := make([]byte, len(data))
copy(c2, data)
var c1 []byte
var kx, ky *big.Int
for {
k, err := rand.Int(rand.Reader, s.publicKey.Params().N)
if err != nil {
return nil, fmt.Errorf("rand error: %v", err)
}
c1x, c1y := s.publicKey.Curve.ScalarBaseMult(k.Bytes())
c1 = elliptic.Marshal(s.publicKey.Curve, c1x, c1y)
kx, ky = s.publicKey.Curve.ScalarMult(s.publicKey.X, s.publicKey.Y, k.Bytes())
err = s.sdk.Kdf(s.publicKey, kx, ky, c2)
if err != nil {
return nil, fmt.Errorf("kdf error: %v", err)
}
if s.encrypted(c2, data) {
break
}
}
c3 := s.sdk.CalculateHash(kx, data, ky)
c1Len := len(c1)
c2Len := len(c2)
c3Len := len(c3)
toData := make([]byte, c1Len+c2Len+c3Len)
if s.cipherType == model.C1C2C3 {
copy(toData[:c1Len], c1)
copy(toData[c1Len:c1Len+c2Len], c2)
copy(toData[c1Len+c2Len:], c3)
} else if s.cipherType == model.C1C3C2 {
copy(toData[:c1Len], c1)
copy(toData[c1Len:c1Len+c3Len], c3)
copy(toData[c1Len+c3Len:], c2)
} else {
return nil, fmt.Errorf("cipher type not support")
}
return toData, nil
}
func (s *Cmb) encrypted(encData []byte, in []byte) bool {
encDataLen := len(encData)
for i := 0; i != encDataLen; i++ {
if encData[i] != in[i] {
return true
}
}
return false
}
func (s *Cmb) Decrypt(input string) (string, error) {
tmpDataArr := strings.Split(input, "|")
if len(tmpDataArr) != 2 {
return "", fmt.Errorf("数据格式错误")
}
keyAndIvStr := tmpDataArr[0]
encryptedBody := tmpDataArr[1]
data, err := base64.StdEncoding.DecodeString(keyAndIvStr)
if err != nil {
return "", fmt.Errorf("data is not base64 string: %s", err.Error())
}
kvBase64Tmp, err := s.decrypt(data)
if err != nil {
return "", err
}
kvTmp, err := base64.StdEncoding.DecodeString(kvBase64Tmp)
if err != nil {
return "", err
}
if len(kvTmp) != 33 {
return "", fmt.Errorf("iv长度不等于33")
}
plainKey := kvTmp[0:16]
plainIv := kvTmp[17:33]
data2, err := base64.StdEncoding.DecodeString(encryptedBody)
if err != nil {
return "", err
}
plainText, err := sm4.CBCDecrypt(plainKey, plainIv, data2)
if err != nil {
return "", err
}
return string(utils.Padding(plainText, 0)), nil
}
func (s *Cmb) decrypt(data []byte) (string, error) {
c1Len := 65
C1Byte := make([]byte, c1Len)
copy(C1Byte, data[:c1Len])
x, y := elliptic.Unmarshal(s.privateKey.Curve, C1Byte)
dBC1X, dBC1Y := s.privateKey.Curve.ScalarMult(x, y, s.privateKey.D.Bytes())
c2Len := len(data) - c1Len - s.c3Len
c2 := make([]byte, c2Len)
c3 := make([]byte, s.c3Len)
if s.cipherType == model.C1C2C3 {
copy(c2, data[c1Len:c1Len+c2Len])
copy(c3, data[c1Len+c2Len:])
} else if s.cipherType == model.C1C3C2 {
copy(c3, data[c1Len:c1Len+s.c3Len])
copy(c2, data[c1Len+s.c3Len:])
} else {
return "", fmt.Errorf("cipher type not support")
}
if err := s.sdk.Kdf(s.privateKey.Curve, dBC1X, dBC1Y, c2); err != nil {
return "", fmt.Errorf("kdf error: %v", err)
}
u := s.sdk.CalculateHash(dBC1X, c2, dBC1Y)
if bytes.Compare(u, c3) == 0 {
return string(c2), nil
}
return "", fmt.Errorf("decrypt error")
}
func (s *Cmb) Sign(input []byte) (string, error) {
signData, err := s.sign(input)
if err != nil {
return "", err
}
return base64.StdEncoding.EncodeToString(signData), nil
}
func (s *Cmb) sign(data []byte) ([]byte, error) {
z := s.sdk.GetZ(s.privateKey.PublicKey.X, s.privateKey.PublicKey.Y, s.uid)
e := s.sdk.GetE(z, data)
c := s.privateKey.PublicKey.Curve
N := c.Params().N
if N.Sign() == 0 {
return nil, fmt.Errorf("invalid curve order")
}
var k, r, sb *big.Int
var err error
for {
for {
k, err = s.randFieldElement(c, rand.Reader)
if err != nil {
return nil, fmt.Errorf("randFieldElement: %+v", err)
}
r, _ = s.privateKey.Curve.ScalarBaseMult(k.Bytes())
r.Add(r, e)
r.Mod(r, N)
if r.Sign() != 0 {
if t := new(big.Int).Add(r, k); t.Cmp(N) != 0 {
break
}
}
}
rD := new(big.Int).Mul(s.privateKey.D, r)
sb = new(big.Int).Sub(k, rD)
d1 := new(big.Int).Add(s.privateKey.D, model.One)
d1Inv := new(big.Int).ModInverse(d1, N)
sb.Mul(sb, d1Inv)
sb.Mod(sb, N)
if sb.Sign() != 0 {
break
}
}
signature := model.Signature{R: r, S: sb}
si, err := asn1.Marshal(signature)
if err != nil {
return nil, fmt.Errorf("asn1.Marshal: %+v", err)
}
return si, nil
}
func (s *Cmb) randFieldElement(c elliptic.Curve, random io.Reader) (k *big.Int, err error) {
params := c.Params()
b := make([]byte, params.BitSize/8+8)
_, err = io.ReadFull(random, b)
if err != nil {
return
}
k = new(big.Int).SetBytes(b)
n := new(big.Int).Sub(params.N, model.One)
k.Mod(k, n)
k.Add(k, model.One)
return
}
func (s *Cmb) Verify(input, sign string) (bool, error) {
signBytes, err := base64.StdEncoding.DecodeString(sign)
if err != nil {
return false, fmt.Errorf("signature is not base64 string: %s", err.Error())
}
signature := model.Signature{}
_, err = asn1.Unmarshal(signBytes, &signature)
if err != nil {
return false, fmt.Errorf("signature is not asn1: %s", err.Error())
}
ok := s.verify([]byte(input), signature)
if !ok {
return false, nil
}
return true, nil
}
func (s *Cmb) verifyBool(data []byte) bool {
if bytes.Equal(data, model.VerifyTrue) {
return true
}
return false
}
func (s *Cmb) verify(data []byte, signature model.Signature) bool {
c := s.publicKey.Curve
N := c.Params().N
if signature.R.Cmp(model.One) < 0 || signature.S.Cmp(model.One) < 0 {
return s.verifyBool(model.VerifyFalse)
}
if signature.R.Cmp(N) >= 0 || signature.S.Cmp(N) >= 0 {
return s.verifyBool(model.VerifyFalse)
}
z := s.sdk.GetZ(s.publicKey.X, s.publicKey.Y, s.uid)
e := s.sdk.GetE(z, data)
t := new(big.Int).Add(signature.R, signature.S)
t.Mod(t, N)
if t.Sign() == 0 {
return s.verifyBool(model.VerifyFalse)
}
var x *big.Int
x1, y1 := c.ScalarBaseMult(signature.S.Bytes())
x2, y2 := c.ScalarMult(s.publicKey.X, s.publicKey.Y, t.Bytes())
x, _ = c.Add(x1, y1, x2, y2)
x.Add(x, e)
x.Mod(x, N)
if x.Cmp(signature.R) == 0 {
return s.verifyBool(model.VerifyTrue)
}
return s.verifyBool(model.VerifyFalse)
}

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package cmbv2
import (
"testing"
)
func TestCmb_EncryptDecrypt(t *testing.T) {
priKey := "8d39ff3d2559258c163f4510f082727f51531e1953ab203d5ab1ea4a6d94fd73"
pukKey := "04d827a7dbaaa358ce45b8c7794a7f54819f5c175005a702370e47f135ef6f5f9732758b1474f218419fe9e87f90c28c3b05f08254c651db27df35fae67b77b2e4"
n, err := NewCmb(priKey, pukKey)
if err != nil {
t.Errorf("NewCmb() error = %v", err)
return
}
content := `{"name":"zhangxx","phoneNo":"137xxxxxxxx"}`
got, err := n.Encrypt([]byte(content))
if err != nil {
t.Errorf("Encrypt() error = %v", err)
return
}
t.Log(got)
got2, err := n.Decrypt(got)
if err != nil {
t.Errorf("Decrypt() error = %v", err)
return
}
t.Log(got2)
}
func TestCmb_SignVerify(t *testing.T) {
priKey := "8d39ff3d2559258c163f4510f082727f51531e1953ab203d5ab1ea4a6d94fd73"
pukKey := "04d827a7dbaaa358ce45b8c7794a7f54819f5c175005a702370e47f135ef6f5f9732758b1474f218419fe9e87f90c28c3b05f08254c651db27df35fae67b77b2e4"
n, err := NewCmb(priKey, pukKey)
if err != nil {
t.Errorf("NewCmb() error = %v", err)
return
}
content := `{"name":"zhangxx","phoneNo":"137xxxxxxxx"}`
got, err := n.Sign([]byte(content))
if err != nil {
t.Errorf("Sign() error = %v", err)
return
}
t.Log(got)
got2, err := n.Verify(content, got)
if err != nil {
t.Errorf("Verify() error = %v", err)
return
}
t.Log(got2)
}

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package utils
import (
"crypto/aes"
"crypto/cipher"
"crypto/elliptic"
"crypto/hmac"
"crypto/md5"
"crypto/rand"
"crypto/sha1"
"crypto/sha256"
"crypto/sha512"
"crypto/x509/pkix"
"encoding/asn1"
"fmt"
"hash"
"math/big"
"reflect"
"voucher/internal/pkg/cmb/sm2/model"
)
/*
* reference to RFC5959 and RFC2898
*/
var (
oidPBES2 = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 5, 13} // id-PBES2(PBES2)
oidPBKDF2 = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 5, 12} // id-PBKDF2
oidAES128CBC = asn1.ObjectIdentifier{2, 16, 840, 1, 101, 3, 4, 1, 2}
oidAES256CBC = asn1.ObjectIdentifier{2, 16, 840, 1, 101, 3, 4, 1, 42}
oidKEYMD5 = asn1.ObjectIdentifier{1, 2, 840, 113549, 2, 5}
oidKEYSHA1 = asn1.ObjectIdentifier{1, 2, 840, 113549, 2, 7}
oidKEYSHA256 = asn1.ObjectIdentifier{1, 2, 840, 113549, 2, 9}
oidKEYSHA512 = asn1.ObjectIdentifier{1, 2, 840, 113549, 2, 11}
oidSM2 = asn1.ObjectIdentifier{1, 2, 840, 10045, 2, 1}
)
type Sm2PrivateKey struct {
Version int
PrivateKey []byte
NamedCurveOID asn1.ObjectIdentifier `asn1:"optional,explicit,tag:0"`
PublicKey asn1.BitString `asn1:"optional,explicit,tag:1"`
}
type pkcs8 struct {
Version int
Algo pkix.AlgorithmIdentifier
PrivateKey []byte
}
// EncryptedPrivateKeyInfo reference to https://www.rfc-editor.org/rfc/rfc5958.txt
type EncryptedPrivateKeyInfo struct {
EncryptionAlgorithm Pbes2Algorithms
EncryptedData []byte
}
// Pbes2Algorithms reference to https://www.ietf.org/rfc/rfc2898.txt
type Pbes2Algorithms struct {
IdPBES2 asn1.ObjectIdentifier
Pbes2Params Pbes2Params
}
// Pbes2Params reference to https://www.ietf.org/rfc/rfc2898.txt
type Pbes2Params struct {
KeyDerivationFunc Pbes2KDfs // PBES2-KDFs
EncryptionScheme Pbes2Encs // PBES2-Encs
}
// Pbes2KDfs reference to https://www.ietf.org/rfc/rfc2898.txt
type Pbes2KDfs struct {
IdPBKDF2 asn1.ObjectIdentifier
Pkdf2Params Pkdf2Params
}
type Pbes2Encs struct {
EncryAlgo asn1.ObjectIdentifier
IV []byte
}
// Pkdf2Params reference to https://www.ietf.org/rfc/rfc2898.txt
type Pkdf2Params struct {
Salt []byte
IterationCount int
Prf pkix.AlgorithmIdentifier
}
func ParsePrivateKey(bytes []byte, pwd []byte) (*model.PrivateKey, error) {
var priKey Sm2PrivateKey
var err error
if pwd == nil {
priKey, err = ParsePKCS8UnEncryptedPrivateKey(bytes)
} else {
priKey, err = ParsePKCS8EncryptedPrivateKey(bytes, pwd)
}
if err != nil {
return nil, fmt.Errorf("parse private key err: %s", err.Error())
}
curve := NewP256Sm2()
k := new(big.Int).SetBytes(priKey.PrivateKey)
curveOrder := curve.Params().N
if k.Cmp(curveOrder) >= 0 {
return nil, fmt.Errorf("invalid elliptic curve private key value")
}
privateKey := make([]byte, (curveOrder.BitLen()+7)/8)
for len(priKey.PrivateKey) > len(privateKey) {
if priKey.PrivateKey[0] != 0 {
return nil, fmt.Errorf("invalid private key")
}
priKey.PrivateKey = priKey.PrivateKey[1:]
}
copy(privateKey[len(privateKey)-len(priKey.PrivateKey):], priKey.PrivateKey)
x, y := curve.ScalarBaseMult(privateKey)
return &model.PrivateKey{
PublicKey: &model.PublicKey{
Curve: curve,
X: x,
Y: y,
},
D: k,
}, nil
}
func ParsePKCS8UnEncryptedPrivateKey(bytes []byte) (Sm2PrivateKey, error) {
var pk pkcs8
var priKey Sm2PrivateKey
if _, err := asn1.Unmarshal(bytes, &pk); err != nil {
return priKey, err
}
if !reflect.DeepEqual(pk.Algo.Algorithm, oidSM2) {
return priKey, fmt.Errorf("not sm2 elliptic curve")
}
if _, err := asn1.Unmarshal(pk.PrivateKey, &priKey); err != nil {
return priKey, fmt.Errorf("privateKey is not sm2 private key: %s", err.Error())
}
return priKey, nil
}
func ParsePKCS8EncryptedPrivateKey(bytes, pwd []byte) (Sm2PrivateKey, error) {
var keyInfo EncryptedPrivateKeyInfo
var priKey Sm2PrivateKey
_, err := asn1.Unmarshal(bytes, &keyInfo)
if err != nil {
return priKey, fmt.Errorf("privateKey is not sm2 encrypted private key: %s", err.Error())
}
if !reflect.DeepEqual(keyInfo.EncryptionAlgorithm.IdPBES2, oidPBES2) {
return priKey, fmt.Errorf("x509: only support PBES2")
}
encryptionScheme := keyInfo.EncryptionAlgorithm.Pbes2Params.EncryptionScheme
keyDerivationFunc := keyInfo.EncryptionAlgorithm.Pbes2Params.KeyDerivationFunc
if !reflect.DeepEqual(keyDerivationFunc.IdPBKDF2, oidPBKDF2) {
return priKey, fmt.Errorf("x509: only support PBKDF2")
}
pkdf2Params := keyDerivationFunc.Pkdf2Params
if !reflect.DeepEqual(encryptionScheme.EncryAlgo, oidAES128CBC) &&
!reflect.DeepEqual(encryptionScheme.EncryAlgo, oidAES256CBC) {
return priKey, fmt.Errorf("x509: only support AES")
}
iv := encryptionScheme.IV
salt := pkdf2Params.Salt
iter := pkdf2Params.IterationCount
encryptedKey := keyInfo.EncryptedData
var key []byte
switch {
case pkdf2Params.Prf.Algorithm.Equal(oidKEYMD5):
key = pbkdf(pwd, salt, iter, 32, md5.New)
break
case pkdf2Params.Prf.Algorithm.Equal(oidKEYSHA1):
key = pbkdf(pwd, salt, iter, 32, sha1.New)
break
case pkdf2Params.Prf.Algorithm.Equal(oidKEYSHA256):
key = pbkdf(pwd, salt, iter, 32, sha256.New)
break
case pkdf2Params.Prf.Algorithm.Equal(oidKEYSHA512):
key = pbkdf(pwd, salt, iter, 32, sha512.New)
break
default:
return priKey, fmt.Errorf("x509: unknown hash algorithm")
}
block, err := aes.NewCipher(key)
if err != nil {
return priKey, err
}
mode := cipher.NewCBCDecrypter(block, iv)
mode.CryptBlocks(encryptedKey, encryptedKey)
return ParsePKCS8UnEncryptedPrivateKey(encryptedKey)
}
// copy from crypto/pbkdf2.go
func pbkdf(password, salt []byte, iter, keyLen int, h func() hash.Hash) []byte {
prf := hmac.New(h, password)
hashLen := prf.Size()
numBlocks := (keyLen + hashLen - 1) / hashLen
var buf [4]byte
dk := make([]byte, 0, numBlocks*hashLen)
U := make([]byte, hashLen)
for block := 1; block <= numBlocks; block++ {
// N.B.: || means concatenation, ^ means XOR
// for each block T_i = U_1 ^ U_2 ^ ... ^ U_iter
// U_1 = PRF(password, salt || uint(i))
prf.Reset()
prf.Write(salt)
buf[0] = byte(block >> 24)
buf[1] = byte(block >> 16)
buf[2] = byte(block >> 8)
buf[3] = byte(block)
prf.Write(buf[:4])
dk = prf.Sum(dk)
T := dk[len(dk)-hashLen:]
copy(U, T)
// U_n = PRF(password, U_(n-1))
for n := 2; n <= iter; n++ {
prf.Reset()
prf.Write(U)
U = U[:0]
U = prf.Sum(U)
for x := range U {
T[x] ^= U[x]
}
}
}
return dk[:keyLen]
}
func MarshalSm2PrivateKey(key *model.PrivateKey, pwd []byte) ([]byte, error) {
if pwd == nil {
return MarshalSm2UnEncryptedPrivateKey(key)
}
return MarshalSm2EncryptedPrivateKey(key, pwd)
}
func MarshalSm2EncryptedPrivateKey(priKey *model.PrivateKey, pwd []byte) ([]byte, error) {
der, err := MarshalSm2UnEncryptedPrivateKey(priKey)
if err != nil {
return nil, err
}
iter := 2048
salt := make([]byte, 8)
iv := make([]byte, 16)
rand.Reader.Read(salt)
rand.Reader.Read(iv)
key := pbkdf(pwd, salt, iter, 32, sha1.New) // 默认是SHA1
padding := aes.BlockSize - len(der)%aes.BlockSize
if padding > 0 {
n := len(der)
der = append(der, make([]byte, padding)...)
for i := 0; i < padding; i++ {
der[n+i] = byte(padding)
}
}
encryptedKey := make([]byte, len(der))
block, err := aes.NewCipher(key)
if err != nil {
return nil, err
}
mode := cipher.NewCBCEncrypter(block, iv)
mode.CryptBlocks(encryptedKey, der)
var algorithmIdentifier pkix.AlgorithmIdentifier
algorithmIdentifier.Algorithm = oidKEYSHA1
algorithmIdentifier.Parameters.Tag = 5
algorithmIdentifier.Parameters.IsCompound = false
algorithmIdentifier.Parameters.FullBytes = []byte{5, 0}
keyDerivationFunc := Pbes2KDfs{
oidPBKDF2,
Pkdf2Params{
salt,
iter,
algorithmIdentifier,
},
}
encryptionScheme := Pbes2Encs{
oidAES256CBC,
iv,
}
pbes2Algorithms := Pbes2Algorithms{
oidPBES2,
Pbes2Params{
keyDerivationFunc,
encryptionScheme,
},
}
encryptedPkey := EncryptedPrivateKeyInfo{
pbes2Algorithms,
encryptedKey,
}
return asn1.Marshal(encryptedPkey)
}
func MarshalSm2UnEncryptedPrivateKey(key *model.PrivateKey) ([]byte, error) {
var r pkcs8
var pri Sm2PrivateKey
var algo pkix.AlgorithmIdentifier
algo.Algorithm = oidSM2
algo.Parameters.Class = 0
algo.Parameters.Tag = 6
algo.Parameters.IsCompound = false
algo.Parameters.FullBytes = []byte{6, 8, 42, 129, 28, 207, 85, 1, 130, 45} // asn1.Marshal(asn1.ObjectIdentifier{1, 2, 156, 10197, 1, 301})
pri.Version = 1
pri.NamedCurveOID = oidNamedCurveP256SM2
pri.PublicKey = asn1.BitString{Bytes: elliptic.Marshal(key.Curve, key.X, key.Y)}
pri.PrivateKey = key.D.Bytes()
r.Version = 0
r.Algo = algo
r.PrivateKey, _ = asn1.Marshal(pri)
return asn1.Marshal(r)
}
func MarshalSm2PublicKey(key *model.PublicKey) ([]byte, error) {
var r PKIXPublicKey
var algo pkix.AlgorithmIdentifier
if key.Curve.Params() != NewP256Sm2().Params() {
return nil, fmt.Errorf("x509: unsupported elliptic curve")
}
algo.Algorithm = oidSM2
algo.Parameters.Class = 0
algo.Parameters.Tag = 6
algo.Parameters.IsCompound = false
algo.Parameters.FullBytes = []byte{6, 8, 42, 129, 28, 207, 85, 1, 130, 45} // asn1.Marshal(asn1.ObjectIdentifier{1, 2, 156, 10197, 1, 301})
r.Algo = algo
r.BitString = asn1.BitString{Bytes: elliptic.Marshal(key.Curve, key.X, key.Y)}
return asn1.Marshal(r)
}

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package utils
import (
"bytes"
"crypto/rand"
"encoding/hex"
"fmt"
"math/big"
"strings"
"voucher/internal/pkg/cmbv2/model"
"voucher/internal/pkg/helper"
)
func GenerateSM4Key() []byte {
str := "qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASDFGHJKLZXCVBNM1234567890"
buffer := make([]byte, 16)
for i := 0; i < 16; i++ {
nextInt, _ := rand.Int(rand.Reader, big.NewInt(int64(len(str))))
buffer[i] = str[nextInt.Int64()]
}
return buffer
}
// GetSM4IV 获取SM4的IV
func GetSM4IV() []byte {
return RandomBytes(16)
}
func RandomBytes(length int) []byte {
str := "qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASDFGHJKLZXCVBNM1234567890"
buffer := make([]byte, length)
for i := 0; i < 16; i++ {
nextInt, _ := rand.Int(rand.Reader, big.NewInt(int64(len(str))))
buffer[i] = str[nextInt.Int64()]
}
return buffer
}
func Padding(input []byte, mode int) []byte {
if input == nil {
return nil
} else {
var ret []byte
if mode == 1 {
p := 16 - len(input)%16
ret = make([]byte, len(input)+p)
copy(ret, input)
for i := 0; i < p; i++ {
ret[len(input)+i] = byte(p)
}
} else {
p := input[len(input)-1]
ret = make([]byte, len(input)-int(p))
copy(ret, input[:len(input)-int(p)])
}
return ret
}
}
func AssemblingByteArray(key, iv []byte) []byte {
os := make([]byte, 0)
os = append(os, key...)
os = append(os, []byte("|")...)
os = append(os, iv...)
return os
}
func SortStructStr(req interface{}) string {
kvRows := helper.SortStructFieldsByKey(req)
var strToBeSigned strings.Builder
for _, kv := range kvRows {
if kv.Key == "sign" {
continue
}
if kv.Value == "" {
continue
}
strToBeSigned.WriteString(fmt.Sprintf("%s=%s&", kv.Key, kv.Value))
}
return strings.TrimRight(strToBeSigned.String(), "&")
}
func BigIntToByte(n *big.Int) []byte {
byteArray := n.Bytes()
// If the bytes is not a multiple of 32, pad with zero bytes.
byteArrLen := len(byteArray)
KeyBytes := 32
if byteArrLen == KeyBytes {
return byteArray
}
byteArray = append(make([]byte, KeyBytes-byteArrLen), byteArray...)
// If the most significant byte's most significant bit is set,
// prepend a 0 byte to the slice to avoid being interpreted as a negative number.
if (byteArray[0] & 0x80) != 0 {
byteArray = append([]byte{0}, byteArray...)
}
return byteArray
}
func JoinBytes(params ...[]byte) ([]byte, error) {
var buffer bytes.Buffer
for i := 0; i < len(params); i++ {
_, err := buffer.Write(params[i])
if err != nil {
return nil, err
}
}
return buffer.Bytes(), nil
}
func HexToPrivateKey(params *Sm2P256Curve, d []byte) (*model.PrivateKey, error) {
k := new(big.Int).SetBytes(d)
c := NewP256Sm2()
//params := c.Params()
n := new(big.Int).Sub(params.N, model.One)
if k.Cmp(n) >= 0 {
return nil, fmt.Errorf("privateKey is overflow")
}
pri := &model.PrivateKey{
PublicKey: &model.PublicKey{},
D: nil,
}
pri.PublicKey.Curve = c
pri.D = k
pri.PublicKey.X, pri.PublicKey.Y = c.ScalarBaseMult(k.Bytes())
return pri, nil
}
func HexToPublicKey(curve *Sm2P256Curve, d []byte) (*model.PublicKey, error) {
if len(d) == 65 && d[0] == byte(0x04) {
d = d[1:]
}
if len(d) != 64 {
return nil, fmt.Errorf("publicKey is not 64 bytes: %d", len(d))
}
pub := new(model.PublicKey)
pub.Curve = curve
pub.X = new(big.Int).SetBytes(d[:32])
pub.Y = new(big.Int).SetBytes(d[32:])
return pub, nil
}
func PrivateKeyToHex(key *model.PrivateKey) string {
return key.D.Text(16)
}
func PublicKeyToHex(key *model.PublicKey) string {
x := key.X.Bytes()
y := key.Y.Bytes()
if n := len(x); n < 32 {
x = append(zeroByteSlice()[:32-n], x...)
}
if n := len(y); n < 32 {
y = append(zeroByteSlice()[:32-n], y...)
}
var c []byte
c = append(c, x...)
c = append(c, y...)
c = append([]byte{0x04}, c...)
return hex.EncodeToString(c)
}
// 32byte
func zeroByteSlice() []byte {
return []byte{
0, 0, 0, 0,
0, 0, 0, 0,
0, 0, 0, 0,
0, 0, 0, 0,
0, 0, 0, 0,
0, 0, 0, 0,
0, 0, 0, 0,
0, 0, 0, 0,
}
}
func HexToSignature(hexStr string) (s model.Signature, err error) {
signData, err := hex.DecodeString(hexStr)
if err != nil {
return
}
rBy := make([]byte, 33)
copy(rBy[1:], signData[:32])
rBy[0] = 0x00
s.R = new(big.Int).SetBytes(rBy)
sBy := make([]byte, 33)
copy(sBy[1:], signData[32:64])
sBy[0] = 0x00
s.S = new(big.Int).SetBytes(sBy)
return
}

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package utils
import (
"crypto/elliptic"
"crypto/x509/pkix"
"encoding/asn1"
"fmt"
"reflect"
"voucher/internal/pkg/cmb/sm2/model"
)
var (
oidNamedCurveP256SM2 = asn1.ObjectIdentifier{1, 2, 156, 10197, 1, 301} // I get the SM2 ID through parsing the pem file generated by gmssl
)
// PKIXPublicKey reflects a PKIX public key structure. See SubjectPublicKeyInfo
// in RFC 3280.
type PKIXPublicKey struct {
Algo pkix.AlgorithmIdentifier
BitString asn1.BitString
}
func ParsePublicKey(bytes []byte) (*model.PublicKey, error) {
var pk PKIXPublicKey
if _, err := asn1.Unmarshal(bytes, &pk); err != nil {
return nil, err
}
if !reflect.DeepEqual(pk.Algo.Algorithm, oidSM2) {
return nil, fmt.Errorf("not sm2 elliptic curve")
}
curve := NewP256Sm2()
x, y := elliptic.Unmarshal(curve, pk.BitString.Bytes)
return &model.PublicKey{
Curve: curve,
X: x,
Y: y,
}, nil
}