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lib/crypto/crypto.go

102 lines
2.0 KiB
Go

package crypto
import (
"crypto/rand"
"crypto/rsa"
"crypto/sha1"
"crypto/sha256"
"crypto/x509"
"encoding/pem"
"errors"
"fmt"
"github.com/Luzifer/go-openssl/v3"
"golang.org/x/crypto/bcrypt"
)
// SHA1 回傳sha1加密
func SHA1(v string) string {
h := sha1.New()
h.Write([]byte(v))
bs := h.Sum(nil)
return fmt.Sprintf("%x", bs)
}
// SHA256 回傳sha256加密
func SHA256(v string) string {
h := sha256.New()
h.Write([]byte(v))
bs := h.Sum(nil)
return fmt.Sprintf("%x", bs)
}
// EncryptPassword 加密密碼
func EncryptPassword(pwd string) (string, error) {
hash, err := bcrypt.GenerateFromPassword([]byte(pwd), bcrypt.DefaultCost)
if err != nil {
return "", err
}
return string(hash), nil
}
// CheckPassword 檢查密碼
func CheckPassword(pwd, hash string) error {
return bcrypt.CompareHashAndPassword([]byte(hash), []byte(pwd))
}
// EncryptAES aes加密
func EncryptAES(value, key string) ([]byte, error) {
o := openssl.New()
enc, err := o.EncryptBytes(key, []byte(value), openssl.DigestMD5Sum)
if err != nil {
return nil, err
}
return enc, nil
}
// DecryptAES aes解密
func DecryptAES(value, key string) ([]byte, error) {
o := openssl.New()
dec, err := o.DecryptBytes(key, []byte(value), openssl.DigestMD5Sum)
if err != nil {
return nil, err
}
return dec, nil
}
// EncryptRSA rsa加密
func EncryptRSA(value, publicKey []byte) ([]byte, error) {
block, _ := pem.Decode(publicKey)
if block == nil {
return nil, errors.New("public key error")
}
pubInterface, err := x509.ParsePKIXPublicKey(block.Bytes)
if err != nil {
return nil, err
}
pub := pubInterface.(*rsa.PublicKey)
return rsa.EncryptPKCS1v15(rand.Reader, pub, value)
}
// DecryptRSA rsa解密
func DecryptRSA(ciphertext, privateKey []byte) ([]byte, error) {
block, _ := pem.Decode(privateKey)
if block == nil {
return nil, errors.New("private key error")
}
priv, err := x509.ParsePKCS1PrivateKey(block.Bytes)
if err != nil {
return nil, err
}
return rsa.DecryptPKCS1v15(rand.Reader, priv, ciphertext)
}