100 lines
2.8 KiB
Go
100 lines
2.8 KiB
Go
/*
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* @Date: 2021-03-11 17:51:14
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* @LastEditors: viletyy
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* @LastEditTime: 2021-04-26 23:11:30
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* @FilePath: /yolk/crypt/rsa.go
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*/
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package crypt
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import (
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"crypto/rand"
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"crypto/rsa"
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"crypto/x509"
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"encoding/pem"
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"errors"
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)
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// 私钥生成
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//openssl genrsa -out rsa_private_key.pem 1024
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var privateKey = []byte(`
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-----BEGIN RSA PRIVATE KEY-----
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MIICXwIBAAKBgQC1mv515+z3BQYim0nKZPrYm94fPoX0Ew/AJggSdnA2shRsJdMk
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AWretmVVej0AH3mBJ1+6tBXXB8+d+7ffNeHWJYrzoh7gPompQWEIvnArcwnhvTA+
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8xtdd82GWDKC46pNSqhUGEG/oEqq8Y7C3YoReppJWX7M7xut+YHI+m1hhwIDAQAB
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AoGBAIO5WLjM8OR7kGepm2xislBLPmILR74x1UraSyCZJ+uEX6vSA8QqAwpn4jiN
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4ZElQ0ya8qTJ2s2NrNo6qrQMsTEaLKYrombAkZbghRYjeAhVCAnIFdchLpV/BG7n
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NqxdzV8p1iZeK7qGQm9SWWzS60eO+5RCeUWRB9l3VKai242BAkEA32iXN6bZAIeW
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wUIr5GiOV8l6Puw8Or/nRMISHqo4qpbZu2btUTmOuHbLNMo+vVIxCtem2QYGsgMj
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9P44fVwJtQJBANAZObuBUkbsqbX/CA+ikDKDtN6wET6S1KaKTU0P5XhxIWeBE8at
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EQNqzqaTZ+IMeohjDxTzFlFb3VhHFi2cU8sCQQDM5tSqijDFN5ahMdun5e2HvpaM
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V4b2K0Ql4AlWbrECZNDV/JT0xmGL9ghyJnxcj6HDW/7/VXOWmSLFdNTCxUNxAkEA
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i8hGBXOKxuV14jBbQ9VYsvXRarwt+TA781p3Lkp9Q3gKjjIgDJZ4FSmLgk0FvMvR
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CwgvO01GMoRYnFGzzhNyHQJBALy1gjYLIwHwZYb5ul0s1KJGbY+Tw1qabyQ6lm6A
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n5sq4iney5DPUjKcxcP17XvlD9lx7GOS8/ZVWx4krPkydOg=
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-----END RSA PRIVATE KEY-----
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`)
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// 公钥: 根据私钥生成
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//openssl rsa -in rsa_private_key.pem -pubout -out rsa_public_key.pem
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var publicKey = []byte(`
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-----BEGIN PUBLIC KEY-----
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MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC1mv515+z3BQYim0nKZPrYm94f
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PoX0Ew/AJggSdnA2shRsJdMkAWretmVVej0AH3mBJ1+6tBXXB8+d+7ffNeHWJYrz
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oh7gPompQWEIvnArcwnhvTA+8xtdd82GWDKC46pNSqhUGEG/oEqq8Y7C3YoReppJ
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WX7M7xut+YHI+m1hhwIDAQAB
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-----END PUBLIC KEY-----
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`)
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type RsaCrypt struct {
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PublicKey []byte
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PrivateKey []byte
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}
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func NewRsaCrypt(key ...[][]byte) *RsaCrypt {
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if len(key) > 0 {
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if len(key[0]) > 0 {
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privateKey = key[0][0]
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publicKey = key[0][1]
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}
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}
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return &RsaCrypt{
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PrivateKey: privateKey,
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PublicKey: publicKey,
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}
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}
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// 加密
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// 这里最后的结果需要用 base64.StdEncoding.EncodeToString(data)
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func (crypt *RsaCrypt) Encrypt(origData []byte) ([]byte, error) {
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//解密pem格式的公钥
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block, _ := pem.Decode(crypt.PublicKey)
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if block == nil {
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return nil, errors.New("public key error")
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}
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// 解析公钥
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pubInterface, err := x509.ParsePKIXPublicKey(block.Bytes)
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if err != nil {
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return nil, err
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}
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// 类型断言
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pub := pubInterface.(*rsa.PublicKey)
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//加密
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return rsa.EncryptPKCS1v15(rand.Reader, pub, origData)
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}
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// 解密
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func (crypt *RsaCrypt) Decrypt(ciphertext []byte) ([]byte, error) {
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//解密
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block, _ := pem.Decode(crypt.PrivateKey)
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if block == nil {
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return nil, errors.New("private key error!")
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}
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//解析PKCS1格式的私钥
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priv, err := x509.ParsePKCS1PrivateKey(block.Bytes)
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if err != nil {
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return nil, err
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}
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// 解密
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return rsa.DecryptPKCS1v15(rand.Reader, priv, ciphertext)
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}
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