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crypto.go
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crypto.go
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package tlsutils
import (
"bytes"
"crypto/ecdsa"
"crypto/elliptic"
cryptorand "crypto/rand"
"crypto/rsa"
"crypto/sha256"
"crypto/x509"
"encoding/pem"
"fmt"
"hash"
"strings"
"github.com/pkg/errors"
"github.com/yaklang/yaklang/common/utils"
"github.com/yaklang/yaklang/common/yak/yaklib/codec"
)
func Encrypt(raw []byte, pemBytes []byte) (string, error) {
b, _ := pem.Decode(pemBytes)
pub, err := ParseRsaPublicKey(b)
if err != nil {
return "", utils.Errorf("parse public key failed: %s", err)
}
var enc []string
subs, err := SplitBlock(raw, (pub.Size()-11)/2)
if err != nil {
return "", utils.Errorf("split block failed: %s", err)
}
for _, sub := range subs {
rs, err := rsa.EncryptPKCS1v15(cryptorand.Reader, pub, []byte(sub))
if err != nil {
return "", utils.Errorf("enc sub[%s] failed: %s", sub, err)
}
enc = append(enc, codec.EncodeToHex(rs))
}
return strings.Join(enc, "\n"), nil
}
func Decrypt(r string, priPem []byte) ([]byte, error) {
b, _ := pem.Decode(priPem)
pri, err := x509.ParsePKCS1PrivateKey(b.Bytes)
if err != nil {
return nil, utils.Errorf("parse public key failed: %s", err)
}
var groups []string
for line := range utils.ParseLines(r) {
lRaw, err := codec.DecodeHex(line)
if err != nil {
return nil, utils.Errorf("parse hex failed: %s", err)
}
res, err := rsa.DecryptPKCS1v15(cryptorand.Reader, pri, lRaw)
if err != nil {
return nil, utils.Errorf("dec block[%s] failed: %s", codec.StrConvQuote(string(lRaw)), err)
}
groups = append(groups, string(res))
}
return MergeBlock(groups)
}
func GeneratePrivateAndPublicKeyPEM() (pri []byte, pub []byte, _ error) {
return GeneratePrivateAndPublicKeyPEMWithPrivateFormatter("pkcs#1")
}
func GeneratePrivateAndPublicKeyPEMWithPrivateFormatter(t string) (pri []byte, pub []byte, _ error) {
return GeneratePrivateAndPublicKeyPEMWithPrivateFormatterWithSize(t, 2048)
}
func GeneratePrivateAndPublicKeyPEMWithPrivateFormatterWithSize(t string, size int) (pri []byte, pub []byte, _ error) {
pk, err := rsa.GenerateKey(cryptorand.Reader, size)
if err != nil {
return
}
var priBuffer bytes.Buffer
var priDer []byte
switch strings.ToLower(t) {
case "pkcs1", "pkcs#1":
priDer = x509.MarshalPKCS1PrivateKey(pk)
case "ec", "ecdsa":
pk, err := ecdsa.GenerateKey(elliptic.P256(), cryptorand.Reader)
if err != nil {
return nil, nil, err
}
priDer, err = x509.MarshalECPrivateKey(pk)
if err != nil {
return nil, nil, utils.Errorf("marshal ecdsa prikey failed: %s", err)
}
case "pkcs8", "pkcs#8":
fallthrough
default:
priDer, err = x509.MarshalPKCS8PrivateKey(pk)
if err != nil {
return nil, nil, utils.Errorf("marshal pkcs8 prikey failed: %s", err)
}
}
err = pem.Encode(&priBuffer, &pem.Block{
Type: "RSA PRIVATE KEY",
Bytes: priDer,
})
if err != nil {
return nil, nil, utils.Errorf("marshal prikey failed: %s", err)
}
var pubBuffer bytes.Buffer
pubDir, err := x509.MarshalPKIXPublicKey(pk.Public())
if err != nil {
return nil, nil, utils.Errorf("marshal pubkey failed: %s", err)
}
err = pem.Encode(&pubBuffer, &pem.Block{
Type: "PUBLIC KEY",
Bytes: pubDir,
})
if err != nil {
return nil, nil, utils.Errorf("marshal pem pubkey failed: %s", err)
}
return priBuffer.Bytes(), pubBuffer.Bytes(), nil
}
// EncryptWithPkcs1v15 将PEM格式的公钥与数据进行PKCS1v15加密,返回密文与错误
// Example:
// ```
// enc, err := tls.EncryptWithPkcs1v15(pemBytes, "hello")
// ```
func PemPkcs1v15Encrypt(pemBytes []byte, data interface{}) ([]byte, error) {
dataBytes := utils.InterfaceToBytes(data)
block, _ := pem.Decode(pemBytes)
if block == nil {
return nil, errors.Wrap(errors.New("empty pem block"), "pem decode public key failed")
}
pub, err := ParseRsaPublicKey(block)
if err != nil {
return nil, errors.Wrap(err, `x509.ParsePKIXPublicKey(block.Bytes) failed`)
}
_, _ = dataBytes, pub
results, err := rsa.EncryptPKCS1v15(cryptorand.Reader, pub, dataBytes)
if err != nil {
return nil, errors.Wrap(err, `rsa.EncryptPKCS1v15(cryptorand.Reader, pubKey, dataBytes) error`)
}
return results, err
}
func ParseRsaPublicKey(block *pem.Block) (*rsa.PublicKey, error) {
derBytes := block.Bytes
var pub *rsa.PublicKey
var key any
var err error
key, err = x509.ParsePKIXPublicKey(derBytes)
if err != nil {
key, err = x509.ParsePKCS1PublicKey(derBytes)
if err != nil {
return nil, err
}
}
pub, ok := key.(*rsa.PublicKey)
if !ok {
return nil, fmt.Errorf("need *rsa.PublicKey, got %t", key)
}
return pub, nil
}
func PemPkcsOAEPEncrypt(pemBytes []byte, data interface{}) ([]byte, error) {
return PemPkcsOAEPEncryptWithHash(pemBytes, data, sha256.New())
}
func PemPkcsOAEPEncryptWithHash(pemBytes []byte, data interface{}, hashFunc hash.Hash) ([]byte, error) {
dataBytes := utils.InterfaceToBytes(data)
block, _ := pem.Decode(pemBytes)
if block == nil {
return nil, errors.Wrap(errors.New("empty pem block"), "pem decode public key failed")
}
pub, err := ParseRsaPublicKey(block)
if err != nil {
return nil, errors.Wrap(err, `x509.ParsePKIXPublicKey(block.Bytes) failed`)
}
_, _ = dataBytes, pub
results, err := rsa.EncryptOAEP(hashFunc, cryptorand.Reader, pub, dataBytes, nil)
if err != nil {
return nil, errors.Wrap(err, `rsa.EncryptOAEP(cryptorand.Reader, pubKey, dataBytes) error`)
}
return results, err
}
func PemPkcsOAEPDecrypt(pemPriBytes []byte, data interface{}) ([]byte, error) {
return PemPkcsOAEPDecryptWithHash(pemPriBytes, data, sha256.New())
}
func PemPkcsOAEPDecryptWithHash(pemPriBytes []byte, data interface{}, hashFunc hash.Hash) ([]byte, error) {
dataBytes := utils.InterfaceToBytes(data)
b, _ := pem.Decode(pemPriBytes)
pri, err := x509.ParsePKCS1PrivateKey(b.Bytes)
if err != nil {
parsedPri, err := x509.ParsePKCS8PrivateKey(b.Bytes)
if err != nil {
return nil, utils.Errorf("parse private key failed: %s", err)
}
var ok bool
pri, ok = parsedPri.(*rsa.PrivateKey)
if !ok {
return nil, utils.Errorf("need *rsa.PrivateKey, cannot found! ")
}
if pri == nil {
return nil, utils.Errorf("need *rsa.PrivateKey, cannot found! ")
}
}
results, err := rsa.DecryptOAEP(hashFunc, cryptorand.Reader, pri, dataBytes, nil)
if err != nil {
return nil, errors.Wrap(err, `rsa.PemPkcsOAEPDecrypt(cryptorand.Reader, pri, dataBytes) error`)
}
return results, err
}
// DecryptWithPkcs1v15 将PEM格式的私钥与密文进行PKCS1v15解密,返回明文与错误
// Example:
// ```
// dec, err := tls.DecryptWithPkcs1v15(pemBytes, enc)
// ```
func PemPkcs1v15Decrypt(pemPriBytes []byte, data interface{}) ([]byte, error) {
dataBytes := utils.InterfaceToBytes(data)
b, _ := pem.Decode(pemPriBytes)
pri, err := x509.ParsePKCS1PrivateKey(b.Bytes)
if err != nil {
parsedPri, err := x509.ParsePKCS8PrivateKey(b.Bytes)
if err != nil {
return nil, utils.Errorf("parse private key failed: %s", err)
}
var ok bool
pri, ok = parsedPri.(*rsa.PrivateKey)
if !ok {
return nil, utils.Errorf("need *rsa.PrivateKey, cannot found! ")
}
}
results, err := rsa.DecryptPKCS1v15(cryptorand.Reader, pri, dataBytes)
if err != nil {
return nil, errors.Wrap(err, `rsa.DecryptPKCS1v15(cryptorand.Reader, pri, dataBytes) error`)
}
return results, err
}