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gorsa.go
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/
gorsa.go
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package gorsa
import (
"crypto/rand"
"crypto/rsa"
"crypto/x509"
"encoding/base64"
"encoding/pem"
"os"
)
// PublicEncrypt 公钥加密
func PublicEncrypt(encryptStr string, path string) (string, error) {
// 打开文件
file, err := os.Open(path)
if err != nil {
return "", err
}
defer file.Close()
// 读取文件内容
info, _ := file.Stat()
buf := make([]byte, info.Size())
file.Read(buf)
// pem 解码
block, _ := pem.Decode(buf)
// x509 解码
publicKeyInterface, err := x509.ParsePKIXPublicKey(block.Bytes)
if err != nil {
return "", err
}
// 类型断言
publicKey := publicKeyInterface.(*rsa.PublicKey)
//对明文进行加密
encryptedStr, err := rsa.EncryptPKCS1v15(rand.Reader, publicKey, []byte(encryptStr))
if err != nil {
return "", err
}
//返回密文
return base64.URLEncoding.EncodeToString(encryptedStr), nil
}
// PrivateDecrypt 私钥解密
func PrivateDecrypt(decryptStr string, path string) (string, error) {
// 打开文件
file, err := os.Open(path)
if err != nil {
return "", err
}
defer file.Close()
// 获取文件内容
info, _ := file.Stat()
buf := make([]byte, info.Size())
file.Read(buf)
// pem 解码
block, _ := pem.Decode(buf)
// X509 解码
privateKey, err := x509.ParsePKCS1PrivateKey(block.Bytes)
if err != nil {
return "", err
}
decryptBytes, err := base64.URLEncoding.DecodeString(decryptStr)
//对密文进行解密
decrypted, _ := rsa.DecryptPKCS1v15(rand.Reader, privateKey, decryptBytes)
//返回明文
return string(decrypted), nil
}