├── .gitignore ├── example ├── JavaScript.md ├── .Net.md └── JAVA.md ├── example_test.go ├── gorsaSign.go ├── gorsa.go ├── rsakey.go ├── README.md ├── rsa.go ├── rsa_ext.go └── LICENSE /.gitignore: -------------------------------------------------------------------------------- 1 | # Binaries for programs and plugins 2 | *.exe 3 | *.dll 4 | *.so 5 | *.dylib 6 | 7 | # Test binary, build with `go test -c` 8 | *.test 9 | 10 | # Output of the go coverage tool, specifically when used with LiteIDE 11 | *.out 12 | 13 | # Project-local glide cache, RE: https://github.com/Masterminds/glide/issues/736 14 | .glide/ 15 | 16 | .idea -------------------------------------------------------------------------------- /example/JavaScript.md: -------------------------------------------------------------------------------- 1 | # 对应 js 版本 2 | 3 | ```js 4 | var NodeRSA = require('node-rsa'); 5 | 6 | const encrypt_rsa = function (data) { 7 | 8 | const privateKey = new NodeRSA("-----BEGIN PRIVATE KEY-----\n" + 9 | 10 | "客户生成私钥\n" + 11 | 12 | "-----END PRIVATE KEY-----"); 13 | 14 | const result = privateKey.encryptPrivate(data, "base64"); 15 | 16 | const hexResult = Buffer.from(result, 'utf8').toString('hex'); 17 | 18 | return hexResult; 19 | 20 | } 21 | ``` 22 | -------------------------------------------------------------------------------- /example_test.go: -------------------------------------------------------------------------------- 1 | // Copyright 2012 The Go Authors. All rights reserved. 2 | // Use of this source code is governed by a BSD-style 3 | // license that can be found in the LICENSE file. 4 | 5 | // Keep in sync with ../base32/example_test.go. 6 | 7 | package gorsa 8 | 9 | import ( 10 | "fmt" 11 | "testing" 12 | ) 13 | 14 | func Test_Example(t *testing.T) { 15 | res, err := GenerateKey(1024) 16 | if err != nil { 17 | fmt.Println(err) 18 | return 19 | } 20 | publicKey := res.PublicKeyBase64 21 | privateKey := res.PrivateKeyBase64 22 | 23 | fmt.Println("\n私钥: \n\r" + privateKey) 24 | fmt.Println("\n公钥: \n\r" + publicKey) 25 | fmt.Println("\n私钥加密 —— 公钥解密") 26 | 27 | str := `{"domainId":"id", "externalUserId":"test001"}` 28 | fmt.Println("\n\r明文：\r\n" + str) 29 | encodedData, err := PriKeyEncrypt(str, privateKey) 30 | if err != nil { 31 | fmt.Println(err) 32 | return 33 | } 34 | fmt.Println("\n密文：\r\n" + encodedData) 35 | 36 | decodedData, err := PublicDecrypt(encodedData, publicKey) 37 | if err != nil { 38 | fmt.Println(err) 39 | return 40 | } 41 | fmt.Println("\n解密后文字: \r\n" + decodedData) 42 | } 43 | -------------------------------------------------------------------------------- /gorsaSign.go: -------------------------------------------------------------------------------- 1 | package gorsa 2 | 3 | // 使用RSAWithMD5算法签名 4 | func SignMd5WithRsa(data string, privateKey string) (string, error) { 5 | grsa := RSASecurity{} 6 | grsa.SetPrivateKey(privateKey) 7 | 8 | sign, err := grsa.SignMd5WithRsa(data) 9 | if err != nil { 10 | return "", err 11 | } 12 | 13 | return sign, err 14 | } 15 | 16 | // 使用RSAWithSHA1算法签名 17 | func SignSha1WithRsa(data string, privateKey string) (string, error) { 18 | grsa := RSASecurity{} 19 | grsa.SetPrivateKey(privateKey) 20 | 21 | sign, err := grsa.SignSha1WithRsa(data) 22 | if err != nil { 23 | return "", err 24 | } 25 | 26 | return sign, err 27 | } 28 | 29 | // 使用RSAWithSHA256算法签名 30 | func SignSha256WithRsa(data string, privateKey string) (string, error) { 31 | grsa := RSASecurity{} 32 | grsa.SetPrivateKey(privateKey) 33 | 34 | sign, err := grsa.SignSha256WithRsa(data) 35 | if err != nil { 36 | return "", err 37 | } 38 | return sign, err 39 | } 40 | 41 | // 使用RSAWithMD5验证签名 42 | func VerifySignMd5WithRsa(data string, signData string, publicKey string) error { 43 | grsa := RSASecurity{} 44 | grsa.SetPublicKey(publicKey) 45 | return grsa.VerifySignMd5WithRsa(data, signData) 46 | } 47 | 48 | // 使用RSAWithSHA1验证签名 49 | func VerifySignSha1WithRsa(data string, signData string, publicKey string) error { 50 | grsa := RSASecurity{} 51 | grsa.SetPublicKey(publicKey) 52 | return grsa.VerifySignSha1WithRsa(data, signData) 53 | } 54 | 55 | // 使用RSAWithSHA256验证签名 56 | func VerifySignSha256WithRsa(data string, signData string, publicKey string) error { 57 | grsa := RSASecurity{} 58 | grsa.SetPublicKey(publicKey) 59 | return grsa.VerifySignSha256WithRsa(data, signData) 60 | } 61 | -------------------------------------------------------------------------------- /gorsa.go: -------------------------------------------------------------------------------- 1 | package gorsa 2 | 3 | import ( 4 | "encoding/base64" 5 | "encoding/hex" 6 | ) 7 | 8 | // PublicEncrypt 公钥加密 9 | func PublicEncrypt(data, publicKey string) (string, error) { 10 | 11 | gRsa := RSASecurity{} 12 | gRsa.SetPublicKey(publicKey) 13 | 14 | rsaData, err := gRsa.PubKeyENCTYPT([]byte(data)) 15 | if err != nil { 16 | return "", err 17 | } 18 | 19 | baseData := base64.StdEncoding.EncodeToString(rsaData) 20 | return hex.EncodeToString([]byte(baseData)), nil 21 | } 22 | 23 | // PriKeyEncrypt 私钥加密 24 | func PriKeyEncrypt(data, privateKey string) (string, error) { 25 | 26 | gRsa := RSASecurity{} 27 | gRsa.SetPrivateKey(privateKey) 28 | 29 | rsaData, err := gRsa.PriKeyENCTYPT([]byte(data)) 30 | if err != nil { 31 | return "", err 32 | } 33 | 34 | baseData := base64.StdEncoding.EncodeToString(rsaData) 35 | return hex.EncodeToString([]byte(baseData)), nil 36 | } 37 | 38 | // PublicDecrypt 公钥解密 39 | func PublicDecrypt(data, publicKey string) (string, error) { 40 | dataByte, err := hex.DecodeString(data) 41 | if err != nil { 42 | return "", err 43 | } 44 | 45 | dataBs, err := base64.StdEncoding.DecodeString(string(dataByte)) 46 | if err != nil { 47 | return "", err 48 | } 49 | 50 | gRsa := RSASecurity{} 51 | if err := gRsa.SetPublicKey(publicKey); err != nil { 52 | return "", err 53 | } 54 | 55 | rsaData, err := gRsa.PubKeyDECRYPT(dataBs) 56 | if err != nil { 57 | return "", err 58 | } 59 | 60 | return string(rsaData), nil 61 | } 62 | 63 | // PriKeyDecrypt 私钥解密 64 | func PriKeyDecrypt(data, privateKey string) (string, error) { 65 | dataByte, err := hex.DecodeString(data) 66 | if err != nil { 67 | return "", err 68 | } 69 | 70 | dataBs, _ := base64.StdEncoding.DecodeString(string(dataByte)) 71 | 72 | gRsa := RSASecurity{} 73 | 74 | if err := gRsa.SetPrivateKey(privateKey); err != nil { 75 | return "", err 76 | } 77 | 78 | rsaData, err := gRsa.PriKeyDECRYPT(dataBs) 79 | if err != nil { 80 | return "", err 81 | } 82 | 83 | return string(rsaData), nil 84 | } 85 | -------------------------------------------------------------------------------- /rsakey.go: -------------------------------------------------------------------------------- 1 | package gorsa 2 | 3 | import ( 4 | "crypto/rand" 5 | "crypto/rsa" 6 | "crypto/x509" 7 | "encoding/base64" 8 | "encoding/pem" 9 | "fmt" 10 | ) 11 | 12 | type RSAKey struct { 13 | PublicKeyPem []byte //公钥pem字符串 14 | PrivateKeyPem []byte //私钥pem字符串 15 | 16 | PublicKeyBase64 string //公钥base64字符串 17 | PrivateKeyBase64 string //私钥base64字符串 18 | 19 | PublicKey *rsa.PublicKey //公钥 20 | PrivateKey *rsa.PrivateKey //私钥 21 | } 22 | 23 | // GenerateKey 生成RSA私钥和公钥 24 | // bits 证书大小 25 | func GenerateKey(bits int) (resp RSAKey, err error) { 26 | // -------------------------- 设置私钥 -------------------------- 27 | // GenerateKey 函数使用随机数据生成器，random 生成一对具有指定字位数的RSA密钥 28 | privateKey, err := rsa.GenerateKey(rand.Reader, bits) // Reader 是一个全局、共享的密码用强随机数生成器 29 | if err != nil { 30 | return 31 | } 32 | // 通过x509标准将得到的ras私钥序列化为ASN.1 的 DER编码字符串 33 | X509PrivateKey, _ := x509.MarshalPKCS8PrivateKey(privateKey) 34 | // 对x509私钥，进行pem格式编码 35 | privateKeyPem := pem.EncodeToMemory(&pem.Block{ 36 | Type: "Private key", 37 | Bytes: X509PrivateKey, 38 | }) 39 | // 对x509私钥，进行base64格式编码 40 | privateKeyBase64 := fmt.Sprintf( 41 | "-----BEGIN Private key-----\n%s\n-----END Private key-----", 42 | base64.StdEncoding.EncodeToString(X509PrivateKey), 43 | ) 44 | resp.PrivateKeyBase64 = privateKeyBase64 45 | resp.PrivateKeyPem = privateKeyPem 46 | resp.PrivateKey = privateKey 47 | 48 | // -------------------------- 设置公钥 -------------------------- 49 | // 获取公钥的数据 50 | publicKey := &privateKey.PublicKey 51 | // X509对公钥编码 52 | X509PublicKey, err := x509.MarshalPKIXPublicKey(publicKey) 53 | if err != nil { 54 | return 55 | } 56 | // 对x509公钥，进行pem格式编码 57 | publicKeyPem := pem.EncodeToMemory(&pem.Block{ 58 | Type: "Public key", 59 | Bytes: X509PublicKey, 60 | }) 61 | // 对x509公钥，进行base64格式编码 62 | publicKeyBase64 := fmt.Sprintf("-----BEGIN Public key-----\n%s\n-----END Public key-----", 63 | base64.StdEncoding.EncodeToString(X509PublicKey), 64 | ) 65 | resp.PublicKeyBase64 = publicKeyBase64 66 | resp.PublicKeyPem = publicKeyPem 67 | resp.PublicKey = publicKey 68 | return 69 | } 70 | -------------------------------------------------------------------------------- /example/.Net.md: -------------------------------------------------------------------------------- 1 | # 对应.Net版本 2 | 3 | 1、需要先引入 [BouncyCastle.Crypto](https://www.nuget.org/packages/BouncyCastle.Crypto.dll/) 4 | 5 | ```c# 6 | using System; 7 | 8 | using Org.BouncyCastle.Crypto; 9 | 10 | using Org.BouncyCastle.Security; 11 | 12 | using System.Security.Cryptography; 13 | 14 | using System.Text; 15 | 16 | using System.IO; 17 | 18 | using Org.BouncyCastle.OpenSsl; 19 | 20 | using Org.BouncyCastle.Crypto.Parameters; 21 | 22 | 23 | 24 | namespace SSOEncrypt 25 | 26 | { 27 | 28 | 29 | 30 | public class RSAEncrypt 31 | 32 | { 33 | 34 | public static string RSAEncryptByPrivateKey(string privateKey, string strEncryptString) 35 | 36 | { 37 | 38 | //加载私钥 39 | 40 | RSACryptoServiceProvider privateRsa = new RSACryptoServiceProvider(); 41 | 42 | var byteArray = Encoding.ASCII.GetBytes(privateKey); 43 | 44 | using (var ms = new MemoryStream(byteArray)) 45 | 46 | { 47 | 48 | using (var sr = new StreamReader(ms)) 49 | 50 | { 51 | 52 | var pr = new Org.BouncyCastle.Utilities.IO.Pem.PemReader(sr); 53 | 54 | var rsaParams = pr.ReadPemObject(); 55 | 56 | var pk = PrivateKeyFactory.CreateKey(rsaParams.Content); 57 | 58 | privateRsa.ImportParameters(DotNetUtilities.ToRSAParameters(pk as RsaPrivateCrtKeyParameters)); 59 | 60 | pr.Reader.Close(); 61 | 62 | } 63 | 64 | } 65 | 66 | 67 | 68 | //转换密钥 69 | 70 | AsymmetricCipherKeyPair keyPair = DotNetUtilities.GetKeyPair(privateRsa); 71 | 72 | IBufferedCipher c = CipherUtilities.GetCipher("RSA/ECB/PKCS1Padding");// 参数与Java中加密解密的参数一致 73 | 74 | c.Init(true, keyPair.Private); //第一个参数为true表示加密，为false表示解密；第二个参数表示密钥 75 | 76 | 77 | 78 | byte[] DataToEncrypt = Encoding.UTF8.GetBytes(strEncryptString); 79 | 80 | byte[] outBytes = c.DoFinal(DataToEncrypt);//加密 81 | 82 | string strBase64 = Convert.ToBase64String(outBytes); 83 | 84 | byte[] byteArr = Encoding.UTF8.GetBytes(strBase64); 85 | 86 | StringBuilder sb = new StringBuilder(byteArr.Length * 2); 87 | 88 | foreach (byte b in byteArr) 89 | 90 | { 91 | 92 | sb.AppendFormat("{0:x2}", b); 93 | 94 | } 95 | 96 | return sb.ToString(); 97 | 98 | } 99 | 100 | static void Main() 101 | 102 | { 103 | 104 | string data = "{"domainId":"demo","externalUserId":"hello1@sso.com"}"; 105 | 106 | string pem = "-----BEGIN PRIVATE KEY-----n" + 107 | 108 | // 私钥文本 109 | 110 | "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n" + 111 | 112 | "-----END PRIVATE KEY-----"; 113 | 114 | string encryptData = RSAEncryptByPrivateKey(pem, data); 115 | 116 | Console.WriteLine(encryptData); 117 | 118 | } 119 | 120 | } 121 | 122 | } 123 | ``` 124 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # GoRSA Encryption library 2 | 3 | based on https://github.com/farmerx/gorsa Optimized the following points for packaging: 4 | 5 | - Optimization of public and private keys requires registration and initialization in advance. 6 | - The encryption machine does not perform base64 processing, and avoids secondary encapsulation of base64 during cross-program transfer or storage 7 | - The incoming return uses the string type uniformly to avoid conversion trouble 8 | - Supports RSAWithSHA1 and RSAWithSHA256 signature verification algorithms 9 | 10 | Get expansion pack: 11 | 12 | ``` 13 | go get github.com/wenzhenxi/gorsa 14 | ``` 15 | 16 | Specific use: 17 | 18 | 19 | ``` 20 | package main 21 | 22 | import ( 23 | "log" 24 | "errors" 25 | "github.com/wenzhenxi/gorsa" 26 | ) 27 | 28 | var Pubkey = `-----BEGIN Public key----- 29 | MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAk+89V7vpOj1rG6bTAKYM 30 | 56qmFLwNCBVDJ3MltVVtxVUUByqc5b6u909MmmrLBqS//PWC6zc3wZzU1+ayh8xb 31 | UAEZuA3EjlPHIaFIVIz04RaW10+1xnby/RQE23tDqsv9a2jv/axjE/27b62nzvCW 32 | eItu1kNQ3MGdcuqKjke+LKhQ7nWPRCOd/ffVqSuRvG0YfUEkOz/6UpsPr6vrI331 33 | hWRB4DlYy8qFUmDsyvvExe4NjZWblXCqkEXRRAhi2SQRCl3teGuIHtDUxCskRIDi 34 | aMD+Qt2Yp+Vvbz6hUiqIWSIH1BoHJer/JOq2/O6X3cmuppU4AdVNgy8Bq236iXvr 35 | MQIDAQAB 36 | -----END Public key----- 37 | ` 38 | 39 | var Pirvatekey = `-----BEGIN Private key----- 40 | MIIEpAIBAAKCAQEAk+89V7vpOj1rG6bTAKYM56qmFLwNCBVDJ3MltVVtxVUUByqc 41 | 5b6u909MmmrLBqS//PWC6zc3wZzU1+ayh8xbUAEZuA3EjlPHIaFIVIz04RaW10+1 42 | xnby/RQE23tDqsv9a2jv/axjE/27b62nzvCWeItu1kNQ3MGdcuqKjke+LKhQ7nWP 43 | RCOd/ffVqSuRvG0YfUEkOz/6UpsPr6vrI331hWRB4DlYy8qFUmDsyvvExe4NjZWb 44 | lXCqkEXRRAhi2SQRCl3teGuIHtDUxCskRIDiaMD+Qt2Yp+Vvbz6hUiqIWSIH1BoH 45 | Jer/JOq2/O6X3cmuppU4AdVNgy8Bq236iXvrMQIDAQABAoIBAQCCbxZvHMfvCeg+ 46 | YUD5+W63dMcq0QPMdLLZPbWpxMEclH8sMm5UQ2SRueGY5UBNg0WkC/R64BzRIS6p 47 | jkcrZQu95rp+heUgeM3C4SmdIwtmyzwEa8uiSY7Fhbkiq/Rly6aN5eB0kmJpZfa1 48 | 6S9kTszdTFNVp9TMUAo7IIE6IheT1x0WcX7aOWVqp9MDXBHV5T0Tvt8vFrPTldFg 49 | IuK45t3tr83tDcx53uC8cL5Ui8leWQjPh4BgdhJ3/MGTDWg+LW2vlAb4x+aLcDJM 50 | CH6Rcb1b8hs9iLTDkdVw9KirYQH5mbACXZyDEaqj1I2KamJIU2qDuTnKxNoc96HY 51 | 2XMuSndhAoGBAMPwJuPuZqioJfNyS99x++ZTcVVwGRAbEvTvh6jPSGA0k3cYKgWR 52 | NnssMkHBzZa0p3/NmSwWc7LiL8whEFUDAp2ntvfPVJ19Xvm71gNUyCQ/hojqIAXy 53 | tsNT1gBUTCMtFZmAkUsjqdM/hUnJMM9zH+w4lt5QM2y/YkCThoI65BVbAoGBAMFI 54 | GsIbnJDNhVap7HfWcYmGOlWgEEEchG6Uq6Lbai9T8c7xMSFc6DQiNMmQUAlgDaMV 55 | b6izPK4KGQaXMFt5h7hekZgkbxCKBd9xsLM72bWhM/nd/HkZdHQqrNAPFhY6/S8C 56 | IjRnRfdhsjBIA8K73yiUCsQlHAauGfPzdHET8ktjAoGAQdxeZi1DapuirhMUN9Zr 57 | kr8nkE1uz0AafiRpmC+cp2Hk05pWvapTAtIXTo0jWu38g3QLcYtWdqGa6WWPxNOP 58 | NIkkcmXJjmqO2yjtRg9gevazdSAlhXpRPpTWkSPEt+o2oXNa40PomK54UhYDhyeu 59 | akuXQsD4mCw4jXZJN0suUZMCgYAgzpBcKjulCH19fFI69RdIdJQqPIUFyEViT7Hi 60 | bsPTTLham+3u78oqLzQukmRDcx5ddCIDzIicMfKVf8whertivAqSfHytnf/pMW8A 61 | vUPy5G3iF5/nHj76CNRUbHsfQtv+wqnzoyPpHZgVQeQBhcoXJSm+qV3cdGjLU6OM 62 | HgqeaQKBgQCnmL5SX7GSAeB0rSNugPp2GezAQj0H4OCc8kNrHK8RUvXIU9B2zKA2 63 | z/QUKFb1gIGcKxYr+LqQ25/+TGvINjuf6P3fVkHL0U8jOG0IqpPJXO3Vl9B8ewWL 64 | cFQVB/nQfmaMa4ChK0QEUe+Mqi++MwgYbRHx1lIOXEfUJO+PXrMekw== 65 | -----END Private key----- 66 | ` 67 | 68 | 69 | func main() { 70 | // Public key encryption private key decryption 71 | if err := applyPubEPriD(); err != nil { 72 | log.Println(err) 73 | } 74 | // Public key decryption private key encryption 75 | if err := applyPriEPubD(); err != nil { 76 | log.Println(err) 77 | } 78 | } 79 | 80 | // Public key encryption private key decryption 81 | func applyPubEPriD() error { 82 | pubenctypt, err := gorsa.PublicEncrypt(`hello world`,Pubkey) 83 | if err != nil { 84 | return err 85 | } 86 | 87 | pridecrypt, err := gorsa.PriKeyDecrypt(pubenctypt,Pirvatekey) 88 | if err != nil { 89 | return err 90 | } 91 | if string(pridecrypt) != `hello world` { 92 | return errors.New(`Decryption failed`) 93 | } 94 | return nil 95 | } 96 | 97 | // Public key decryption private key encryption 98 | func applyPriEPubD() error { 99 | prienctypt, err := gorsa.PriKeyEncrypt(`hello world`,Pirvatekey) 100 | if err != nil { 101 | return err 102 | } 103 | 104 | pubdecrypt, err := gorsa.PublicDecrypt(prienctypt,Pubkey) 105 | if err != nil { 106 | return err 107 | } 108 | if string(pubdecrypt) != `hello world` { 109 | return errors.New(`Decryption failed`) 110 | } 111 | return nil 112 | } 113 | 114 | ``` 115 | -------------------------------------------------------------------------------- /rsa.go: -------------------------------------------------------------------------------- 1 | package gorsa 2 | 3 | import ( 4 | "bytes" 5 | "crypto" 6 | "crypto/md5" 7 | "crypto/rand" 8 | "crypto/rsa" 9 | "crypto/sha1" 10 | "crypto/sha256" 11 | "encoding/base64" 12 | "errors" 13 | "io/ioutil" 14 | ) 15 | 16 | var RSA = &RSASecurity{} 17 | 18 | type RSASecurity struct { 19 | pubStr string //公钥字符串 20 | priStr string //私钥字符串 21 | pubkey *rsa.PublicKey //公钥 22 | prikey *rsa.PrivateKey //私钥 23 | } 24 | 25 | // 设置公钥 26 | func (rsas *RSASecurity) SetPublicKey(pubStr string) (err error) { 27 | rsas.pubStr = pubStr 28 | rsas.pubkey, err = rsas.GetPublickey() 29 | return err 30 | } 31 | 32 | // 设置私钥 33 | func (rsas *RSASecurity) SetPrivateKey(priStr string) (err error) { 34 | rsas.priStr = priStr 35 | rsas.prikey, err = rsas.GetPrivatekey() 36 | return err 37 | } 38 | 39 | // *rsa.PublicKey 40 | func (rsas *RSASecurity) GetPrivatekey() (*rsa.PrivateKey, error) { 41 | return getPriKey([]byte(rsas.priStr)) 42 | } 43 | 44 | // *rsa.PrivateKey 45 | func (rsas *RSASecurity) GetPublickey() (*rsa.PublicKey, error) { 46 | return getPubKey([]byte(rsas.pubStr)) 47 | } 48 | 49 | // 公钥加密 50 | func (rsas *RSASecurity) PubKeyENCTYPT(input []byte) ([]byte, error) { 51 | if rsas.pubkey == nil { 52 | return []byte(""), errors.New(`Please set the public key in advance`) 53 | } 54 | output := bytes.NewBuffer(nil) 55 | err := pubKeyIO(rsas.pubkey, bytes.NewReader(input), output, true) 56 | if err != nil { 57 | return []byte(""), err 58 | } 59 | return ioutil.ReadAll(output) 60 | } 61 | 62 | // 公钥解密 63 | func (rsas *RSASecurity) PubKeyDECRYPT(input []byte) ([]byte, error) { 64 | if rsas.pubkey == nil { 65 | return []byte(""), errors.New(`Please set the public key in advance`) 66 | } 67 | output := bytes.NewBuffer(nil) 68 | err := pubKeyIO(rsas.pubkey, bytes.NewReader(input), output, false) 69 | if err != nil { 70 | return []byte(""), err 71 | } 72 | return ioutil.ReadAll(output) 73 | } 74 | 75 | // 私钥加密 76 | func (rsas *RSASecurity) PriKeyENCTYPT(input []byte) ([]byte, error) { 77 | if rsas.prikey == nil { 78 | return []byte(""), errors.New(`Please set the private key in advance`) 79 | } 80 | output := bytes.NewBuffer(nil) 81 | err := priKeyIO(rsas.prikey, bytes.NewReader(input), output, true) 82 | if err != nil { 83 | return []byte(""), err 84 | } 85 | return ioutil.ReadAll(output) 86 | } 87 | 88 | // 私钥解密 89 | func (rsas *RSASecurity) PriKeyDECRYPT(input []byte) ([]byte, error) { 90 | if rsas.prikey == nil { 91 | return []byte(""), errors.New(`Please set the private key in advance`) 92 | } 93 | output := bytes.NewBuffer(nil) 94 | err := priKeyIO(rsas.prikey, bytes.NewReader(input), output, false) 95 | if err != nil { 96 | return []byte(""), err 97 | } 98 | 99 | return ioutil.ReadAll(output) 100 | } 101 | 102 | /** 103 | * 使用RSAWithMD5算法签名 104 | */ 105 | func (rsas *RSASecurity) SignMd5WithRsa(data string) (string, error) { 106 | md5Hash := md5.New() 107 | s_data := []byte(data) 108 | md5Hash.Write(s_data) 109 | hashed := md5Hash.Sum(nil) 110 | 111 | signByte, err := rsa.SignPKCS1v15(rand.Reader, rsas.prikey, crypto.MD5, hashed) 112 | sign := base64.StdEncoding.EncodeToString(signByte) 113 | return string(sign), err 114 | } 115 | 116 | /** 117 | * 使用RSAWithSHA1算法签名 118 | */ 119 | func (rsas *RSASecurity) SignSha1WithRsa(data string) (string, error) { 120 | sha1Hash := sha1.New() 121 | s_data := []byte(data) 122 | sha1Hash.Write(s_data) 123 | hashed := sha1Hash.Sum(nil) 124 | 125 | signByte, err := rsa.SignPKCS1v15(rand.Reader, rsas.prikey, crypto.SHA1, hashed) 126 | sign := base64.StdEncoding.EncodeToString(signByte) 127 | return string(sign), err 128 | } 129 | 130 | /** 131 | * 使用RSAWithSHA256算法签名 132 | */ 133 | func (rsas *RSASecurity) SignSha256WithRsa(data string) (string, error) { 134 | sha256Hash := sha256.New() 135 | s_data := []byte(data) 136 | sha256Hash.Write(s_data) 137 | hashed := sha256Hash.Sum(nil) 138 | 139 | signByte, err := rsa.SignPKCS1v15(rand.Reader, rsas.prikey, crypto.SHA256, hashed) 140 | sign := base64.StdEncoding.EncodeToString(signByte) 141 | return string(sign), err 142 | } 143 | 144 | /** 145 | * 使用RSAWithMD5验证签名 146 | */ 147 | func (rsas *RSASecurity) VerifySignMd5WithRsa(data string, signData string) error { 148 | sign, err := base64.StdEncoding.DecodeString(signData) 149 | if err != nil { 150 | return err 151 | } 152 | hash := md5.New() 153 | hash.Write([]byte(data)) 154 | return rsa.VerifyPKCS1v15(rsas.pubkey, crypto.MD5, hash.Sum(nil), sign) 155 | } 156 | 157 | /** 158 | * 使用RSAWithSHA1验证签名 159 | */ 160 | func (rsas *RSASecurity) VerifySignSha1WithRsa(data string, signData string) error { 161 | sign, err := base64.StdEncoding.DecodeString(signData) 162 | if err != nil { 163 | return err 164 | } 165 | hash := sha1.New() 166 | hash.Write([]byte(data)) 167 | return rsa.VerifyPKCS1v15(rsas.pubkey, crypto.SHA1, hash.Sum(nil), sign) 168 | } 169 | 170 | /** 171 | * 使用RSAWithSHA256验证签名 172 | */ 173 | func (rsas *RSASecurity) VerifySignSha256WithRsa(data string, signData string) error { 174 | sign, err := base64.StdEncoding.DecodeString(signData) 175 | if err != nil { 176 | return err 177 | } 178 | hash := sha256.New() 179 | hash.Write([]byte(data)) 180 | 181 | return rsa.VerifyPKCS1v15(rsas.pubkey, crypto.SHA256, hash.Sum(nil), sign) 182 | } 183 | -------------------------------------------------------------------------------- /example/JAVA.md: -------------------------------------------------------------------------------- 1 | # 对应java版本 2 | 3 | ```java 4 | package com.example.demo; 5 | 6 | import org.apache.commons.codec.binary.Base64; 7 | 8 | import javax.crypto.Cipher; 9 | import java.io.ByteArrayOutputStream; 10 | import java.security.*; 11 | import java.security.interfaces.RSAPrivateKey; 12 | import java.security.interfaces.RSAPublicKey; 13 | import java.security.spec.InvalidKeySpecException; 14 | import java.security.spec.PKCS8EncodedKeySpec; 15 | import java.security.spec.X509EncodedKeySpec; 16 | import java.util.HashMap; 17 | import java.util.Map; 18 | 19 | public class Main { 20 | public static final String CHARSET = "UTF-8"; 21 | public static final String RSA_ALGORITHM = "RSA"; 22 | public static final int KEY_SIZE = 1024; 23 | 24 | public static Map createKeys() { 25 | //为RSA算法创建一个KeyPairGenerator对象 26 | KeyPairGenerator kpg; 27 | try { 28 | kpg = KeyPairGenerator.getInstance(RSA_ALGORITHM); 29 | } catch (NoSuchAlgorithmException e) { 30 | throw new IllegalArgumentException("No such algorithm-->[" + RSA_ALGORITHM + "]"); 31 | } 32 | 33 | //初始化KeyPairGenerator对象,密钥长度 34 | kpg.initialize(KEY_SIZE); 35 | //生成密匙对 36 | KeyPair keyPair = kpg.generateKeyPair(); 37 | //得到公钥 38 | Key publicKey = keyPair.getPublic(); 39 | String publicKeyStr = Base64.encodeBase64String(publicKey.getEncoded()); 40 | //得到私钥 41 | Key privateKey = keyPair.getPrivate(); 42 | String privateKeyStr = Base64.encodeBase64String(privateKey.getEncoded()); 43 | Map keyPairMap = new HashMap(); 44 | keyPairMap.put("publicKey", publicKeyStr); 45 | keyPairMap.put("privateKey", privateKeyStr); 46 | 47 | return keyPairMap; 48 | } 49 | 50 | public static RSAPublicKey getPublicKey(String publicKey) throws NoSuchAlgorithmException, InvalidKeySpecException { 51 | //通过X509编码的Key指令获得公钥对象 52 | KeyFactory keyFactory = KeyFactory.getInstance(RSA_ALGORITHM); 53 | X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(Base64.decodeBase64(publicKey)); 54 | RSAPublicKey key = (RSAPublicKey) keyFactory.generatePublic(x509KeySpec); 55 | return key; 56 | } 57 | 58 | 59 | public static RSAPrivateKey getPrivateKey(String privateKey) throws NoSuchAlgorithmException, InvalidKeySpecException { 60 | //通过PKCS#8编码的Key指令获得私钥对象 61 | KeyFactory keyFactory = KeyFactory.getInstance(RSA_ALGORITHM); 62 | PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(Base64.decodeBase64(privateKey)); 63 | RSAPrivateKey key = (RSAPrivateKey) keyFactory.generatePrivate(pkcs8KeySpec); 64 | return key; 65 | } 66 | 67 | public static String privateEncrypt(String data, RSAPrivateKey privateKey) { 68 | try { 69 | Cipher cipher = Cipher.getInstance(RSA_ALGORITHM); 70 | cipher.init(Cipher.ENCRYPT_MODE, privateKey); 71 | 72 | return Base64.encodeBase64String(rsaSplitCodec(cipher, Cipher.ENCRYPT_MODE, data.getBytes(CHARSET), privateKey.getModulus().bitLength())); 73 | } catch (Exception e) { 74 | throw new RuntimeException("加密字符串[" + data + "]时遇到异常", e); 75 | } 76 | } 77 | 78 | 79 | public static String publicDecrypt(String data, RSAPublicKey publicKey) { 80 | try { 81 | Cipher cipher = Cipher.getInstance(RSA_ALGORITHM); 82 | cipher.init(Cipher.DECRYPT_MODE, publicKey); 83 | return new String(rsaSplitCodec(cipher, Cipher.DECRYPT_MODE, Base64.decodeBase64(data), publicKey.getModulus().bitLength()), CHARSET); 84 | } catch (Exception e) { 85 | throw new RuntimeException("解密字符串[" + data + "]时遇到异常", e); 86 | } 87 | } 88 | 89 | private static byte[] rsaSplitCodec(Cipher cipher, int opmode, byte[] datas, int keySize) { 90 | int maxBlock = 0; 91 | if (opmode == Cipher.DECRYPT_MODE) { 92 | maxBlock = keySize / 8; 93 | } else { 94 | maxBlock = keySize / 8 - 11; // 加密 95 | } 96 | 97 | ByteArrayOutputStream out = new ByteArrayOutputStream(); 98 | int offSet = 0; 99 | byte[] buff; 100 | int i = 0; 101 | try { 102 | while (datas.length > offSet) { 103 | if (datas.length - offSet > maxBlock) { 104 | buff = cipher.doFinal(datas, offSet, maxBlock); 105 | } else { 106 | buff = cipher.doFinal(datas, offSet, datas.length - offSet); 107 | } 108 | out.write(buff, 0, buff.length); 109 | i++; 110 | offSet = i * maxBlock; 111 | } 112 | } catch (Exception e) { 113 | e.getMessage(); 114 | } 115 | byte[] resultDatas = out.toByteArray(); 116 | try { 117 | out.close(); 118 | } catch (Exception e) { 119 | e.getMessage(); 120 | } 121 | return resultDatas; 122 | } 123 | 124 | public static String toHexString(String s) { 125 | String str = ""; 126 | for (int i = 0; i < s.length(); i++) { 127 | int ch = (int) s.charAt(i); 128 | str += Integer.toHexString(ch); 129 | } 130 | return str; 131 | } 132 | 133 | 134 | /** 135 | * 16进制字符串转换为字符串 136 | * 137 | * @param s 138 | * @return 139 | */ 140 | public static String hexStringToString(String s) { 141 | if (s == null || s.equals("")) { 142 | return null; 143 | } 144 | s = s.replace(" ", ""); 145 | byte[] baKeyword = new byte[s.length() / 2]; 146 | for (int i = 0; i < baKeyword.length; i++) { 147 | try { 148 | baKeyword[i] = (byte) (0xff & Integer.parseInt(s.substring(i * 2, i * 2 + 2), 16)); 149 | } catch (Exception e) { 150 | e.printStackTrace(); 151 | } 152 | } 153 | try { 154 | s = new String(baKeyword, "gbk"); 155 | new String(); 156 | } catch (Exception e1) { 157 | e1.printStackTrace(); 158 | } 159 | return s; 160 | } 161 | 162 | public static void main(String[] args) throws Exception { 163 | Map keyMap = createKeys(); 164 | String publicKey = keyMap.get("publicKey"); 165 | String privateKey = keyMap.get("privateKey"); 166 | System.out.println("公钥: \n\r" + publicKey); 167 | System.out.println("私钥： \n\r" + privateKey); 168 | System.out.println("私钥加密——公钥解密"); 169 | 170 | String str = "{\"domainId\":\"ssotest\",\"externalUserId\":\"A0001\",\"timestamp\":1672502400}"; 171 | System.out.println("\r明文：\r\n" + str); 172 | 173 | String encodedData = privateEncrypt(str, getPrivateKey(privateKey)); 174 | System.out.println("密文：\r\n" + toHexString(encodedData)); 175 | 176 | String decodedData = publicDecrypt(encodedData, getPublicKey(publicKey)); 177 | System.out.println("解密后文字: \r\n" + decodedData); 178 | 179 | // String privateKey = "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"; 180 | // String encodedData = privateEncrypt(str, getPrivateKey(privateKey)); 181 | // System.out.println(encodedData.toString()); 182 | // System.out.println("密文：\r\n" + toHexString(encodedData)); 183 | 184 | // String publicKey = "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCHokoHFmvJIhKjM76ldAU3fDBgIuX8NFjMVV7+fFYISHPbd9HMxeA9vPXHvtGiYfw0dmSFqwcxA463WtO7XQQ1Nu5HE54id09g1TzQDhXKVVANtDiKJNAUQWCuwHPIqiXHCQf6v01ynR8jR2z40OpMKe1sdnEAloeY9q1l181vbwIDAQAB"; 185 | // String encodedData = "QyNDS8CxI2ziE5Jz0jIBnJLy/L8lsXIpGhouhXw2DnEJ8ZxgnWHoEpHR8sPmbVzOCYvJQ5e4pSrYlGtwtry8bcR4Kn4W2P7XfeIhzTGKWwJFdSyUZeD2AmBMnV25xOoIUQ7BARt58rqy/M+v692ndReXtlshn7ce8FNPexGXlVk="; 186 | // String decodedData = publicDecrypt(encodedData, getPublicKey(publicKey)); 187 | // System.out.println("GO加密，Java解密后文字: \r\n" + decodedData); 188 | 189 | } 190 | } 191 | 192 | ``` 193 | -------------------------------------------------------------------------------- /rsa_ext.go: -------------------------------------------------------------------------------- 1 | package gorsa 2 | 3 | import ( 4 | "bytes" 5 | "crypto/rand" 6 | "crypto/rsa" 7 | "crypto/x509" 8 | "encoding/pem" 9 | "errors" 10 | "io" 11 | "io/ioutil" 12 | "math/big" 13 | ) 14 | 15 | var ( 16 | ErrDataToLarge = errors.New("message too long for RSA public key size") 17 | ErrDataLen = errors.New("data length error") 18 | ErrDataBroken = errors.New("data broken, first byte is not zero") 19 | ErrKeyPairDismatch = errors.New("data is not encrypted by the private key") 20 | ErrDecryption = errors.New("decryption error") 21 | ErrPublicKey = errors.New("get public key error") 22 | ErrPrivateKey = errors.New("get private key error") 23 | ) 24 | 25 | // 设置公钥 26 | func getPubKey(publickey []byte) (*rsa.PublicKey, error) { 27 | // decode public key 28 | block, _ := pem.Decode(publickey) 29 | if block == nil { 30 | return nil, errors.New("get public key error") 31 | } 32 | // x509 parse public key 33 | pub, err := x509.ParsePKIXPublicKey(block.Bytes) 34 | if err != nil { 35 | pub, err = x509.ParsePKCS1PublicKey(block.Bytes) 36 | if err != nil { 37 | return nil, err 38 | } 39 | } 40 | return pub.(*rsa.PublicKey), err 41 | } 42 | 43 | // 设置私钥 44 | func getPriKey(privatekey []byte) (*rsa.PrivateKey, error) { 45 | block, _ := pem.Decode(privatekey) 46 | if block == nil { 47 | return nil, errors.New("get private key error") 48 | } 49 | pri, err := x509.ParsePKCS1PrivateKey(block.Bytes) 50 | if err == nil { 51 | return pri, nil 52 | } 53 | pri2, err := x509.ParsePKCS8PrivateKey(block.Bytes) 54 | if err != nil { 55 | return nil, err 56 | } 57 | return pri2.(*rsa.PrivateKey), nil 58 | } 59 | 60 | // 公钥加密或解密byte 61 | func pubKeyByte(pub *rsa.PublicKey, in []byte, isEncrytp bool) ([]byte, error) { 62 | k := (pub.N.BitLen() + 7) / 8 63 | if isEncrytp { 64 | k = k - 11 65 | } 66 | if len(in) <= k { 67 | if isEncrytp { 68 | return rsa.EncryptPKCS1v15(rand.Reader, pub, in) 69 | } else { 70 | return pubKeyDecrypt(pub, in) 71 | } 72 | } else { 73 | iv := make([]byte, k) 74 | out := bytes.NewBuffer(iv) 75 | if err := pubKeyIO(pub, bytes.NewReader(in), out, isEncrytp); err != nil { 76 | return nil, err 77 | } 78 | return ioutil.ReadAll(out) 79 | } 80 | } 81 | 82 | // 私钥加密或解密byte 83 | func priKeyByte(pri *rsa.PrivateKey, in []byte, isEncrytp bool) ([]byte, error) { 84 | k := (pri.N.BitLen() + 7) / 8 85 | if isEncrytp { 86 | k = k - 11 87 | } 88 | if len(in) <= k { 89 | if isEncrytp { 90 | return priKeyEncrypt(rand.Reader, pri, in) 91 | } else { 92 | return rsa.DecryptPKCS1v15(rand.Reader, pri, in) 93 | } 94 | } else { 95 | iv := make([]byte, k) 96 | out := bytes.NewBuffer(iv) 97 | if err := priKeyIO(pri, bytes.NewReader(in), out, isEncrytp); err != nil { 98 | return nil, err 99 | } 100 | return ioutil.ReadAll(out) 101 | } 102 | } 103 | 104 | // 公钥加密或解密Reader 105 | func pubKeyIO(pub *rsa.PublicKey, in io.Reader, out io.Writer, isEncrytp bool) (err error) { 106 | k := (pub.N.BitLen() + 7) / 8 107 | if isEncrytp { 108 | k = k - 11 109 | } 110 | buf := make([]byte, k) 111 | var b []byte 112 | size := 0 113 | for { 114 | size, err = in.Read(buf) 115 | if err != nil { 116 | if err == io.EOF { 117 | return nil 118 | } 119 | return err 120 | } 121 | if size < k { 122 | b = buf[:size] 123 | } else { 124 | b = buf 125 | } 126 | if isEncrytp { 127 | b, err = rsa.EncryptPKCS1v15(rand.Reader, pub, b) 128 | } else { 129 | b, err = pubKeyDecrypt(pub, b) 130 | } 131 | if err != nil { 132 | return err 133 | } 134 | if _, err = out.Write(b); err != nil { 135 | return err 136 | } 137 | } 138 | return nil 139 | } 140 | 141 | // 私钥加密或解密Reader 142 | func priKeyIO(pri *rsa.PrivateKey, r io.Reader, w io.Writer, isEncrytp bool) (err error) { 143 | k := (pri.N.BitLen() + 7) / 8 144 | if isEncrytp { 145 | k = k - 11 146 | } 147 | buf := make([]byte, k) 148 | var b []byte 149 | size := 0 150 | for { 151 | size, err = r.Read(buf) 152 | if err != nil { 153 | if err == io.EOF { 154 | return nil 155 | } 156 | return err 157 | } 158 | if size < k { 159 | b = buf[:size] 160 | } else { 161 | b = buf 162 | } 163 | if isEncrytp { 164 | b, err = priKeyEncrypt(rand.Reader, pri, b) 165 | } else { 166 | b, err = rsa.DecryptPKCS1v15(rand.Reader, pri, b) 167 | } 168 | if err != nil { 169 | return err 170 | } 171 | if _, err = w.Write(b); err != nil { 172 | return err 173 | } 174 | } 175 | return nil 176 | } 177 | 178 | // 公钥解密 179 | func pubKeyDecrypt(pub *rsa.PublicKey, data []byte) ([]byte, error) { 180 | k := (pub.N.BitLen() + 7) / 8 181 | if k != len(data) { 182 | return nil, ErrDataLen 183 | } 184 | m := new(big.Int).SetBytes(data) 185 | if m.Cmp(pub.N) > 0 { 186 | return nil, ErrDataToLarge 187 | } 188 | m.Exp(m, big.NewInt(int64(pub.E)), pub.N) 189 | d := leftPad(m.Bytes(), k) 190 | if d[0] != 0 { 191 | return nil, ErrDataBroken 192 | } 193 | if d[1] != 0 && d[1] != 1 { 194 | return nil, ErrKeyPairDismatch 195 | } 196 | var i = 2 197 | for ; i < len(d); i++ { 198 | if d[i] == 0 { 199 | break 200 | } 201 | } 202 | i++ 203 | if i == len(d) { 204 | return nil, nil 205 | } 206 | return d[i:], nil 207 | } 208 | 209 | // 私钥加密 210 | func priKeyEncrypt(rand io.Reader, priv *rsa.PrivateKey, hashed []byte) ([]byte, error) { 211 | tLen := len(hashed) 212 | k := (priv.N.BitLen() + 7) / 8 213 | if k < tLen+11 { 214 | return nil, ErrDataLen 215 | } 216 | em := make([]byte, k) 217 | em[1] = 1 218 | for i := 2; i < k-tLen-1; i++ { 219 | em[i] = 0xff 220 | } 221 | copy(em[k-tLen:k], hashed) 222 | m := new(big.Int).SetBytes(em) 223 | c, err := decrypt(rand, priv, m) 224 | if err != nil { 225 | return nil, err 226 | } 227 | copyWithLeftPad(em, c.Bytes()) 228 | return em, nil 229 | } 230 | 231 | // 从crypto/rsa复制 232 | var bigZero = big.NewInt(0) 233 | var bigOne = big.NewInt(1) 234 | 235 | // 从crypto/rsa复制 236 | func encrypt(c *big.Int, pub *rsa.PublicKey, m *big.Int) *big.Int { 237 | e := big.NewInt(int64(pub.E)) 238 | c.Exp(m, e, pub.N) 239 | return c 240 | } 241 | 242 | // 从crypto/rsa复制 243 | func decrypt(random io.Reader, priv *rsa.PrivateKey, c *big.Int) (m *big.Int, err error) { 244 | if c.Cmp(priv.N) > 0 { 245 | err = ErrDecryption 246 | return 247 | } 248 | var ir *big.Int 249 | if random != nil { 250 | var r *big.Int 251 | 252 | for { 253 | r, err = rand.Int(random, priv.N) 254 | if err != nil { 255 | return 256 | } 257 | if r.Cmp(bigZero) == 0 { 258 | r = bigOne 259 | } 260 | var ok bool 261 | ir, ok = modInverse(r, priv.N) 262 | if ok { 263 | break 264 | } 265 | } 266 | bigE := big.NewInt(int64(priv.E)) 267 | rpowe := new(big.Int).Exp(r, bigE, priv.N) 268 | cCopy := new(big.Int).Set(c) 269 | cCopy.Mul(cCopy, rpowe) 270 | cCopy.Mod(cCopy, priv.N) 271 | c = cCopy 272 | } 273 | if priv.Precomputed.Dp == nil { 274 | m = new(big.Int).Exp(c, priv.D, priv.N) 275 | } else { 276 | m = new(big.Int).Exp(c, priv.Precomputed.Dp, priv.Primes[0]) 277 | m2 := new(big.Int).Exp(c, priv.Precomputed.Dq, priv.Primes[1]) 278 | m.Sub(m, m2) 279 | if m.Sign() < 0 { 280 | m.Add(m, priv.Primes[0]) 281 | } 282 | m.Mul(m, priv.Precomputed.Qinv) 283 | m.Mod(m, priv.Primes[0]) 284 | m.Mul(m, priv.Primes[1]) 285 | m.Add(m, m2) 286 | 287 | for i, values := range priv.Precomputed.CRTValues { 288 | prime := priv.Primes[2+i] 289 | m2.Exp(c, values.Exp, prime) 290 | m2.Sub(m2, m) 291 | m2.Mul(m2, values.Coeff) 292 | m2.Mod(m2, prime) 293 | if m2.Sign() < 0 { 294 | m2.Add(m2, prime) 295 | } 296 | m2.Mul(m2, values.R) 297 | m.Add(m, m2) 298 | } 299 | } 300 | if ir != nil { 301 | m.Mul(m, ir) 302 | m.Mod(m, priv.N) 303 | } 304 | 305 | return 306 | } 307 | 308 | // 从crypto/rsa复制 309 | func copyWithLeftPad(dest, src []byte) { 310 | numPaddingBytes := len(dest) - len(src) 311 | for i := 0; i < numPaddingBytes; i++ { 312 | dest[i] = 0 313 | } 314 | copy(dest[numPaddingBytes:], src) 315 | } 316 | 317 | // 从crypto/rsa复制 318 | func nonZeroRandomBytes(s []byte, rand io.Reader) (err error) { 319 | _, err = io.ReadFull(rand, s) 320 | if err != nil { 321 | return 322 | } 323 | for i := 0; i < len(s); i++ { 324 | for s[i] == 0 { 325 | _, err = io.ReadFull(rand, s[i:i+1]) 326 | if err != nil { 327 | return 328 | } 329 | s[i] ^= 0x42 330 | } 331 | } 332 | return 333 | } 334 | 335 | // 从crypto/rsa复制 336 | func leftPad(input []byte, size int) (out []byte) { 337 | n := len(input) 338 | if n > size { 339 | n = size 340 | } 341 | out = make([]byte, size) 342 | copy(out[len(out)-n:], input) 343 | return 344 | } 345 | 346 | // 从crypto/rsa复制 347 | func modInverse(a, n *big.Int) (ia *big.Int, ok bool) { 348 | g := new(big.Int) 349 | x := new(big.Int) 350 | y := new(big.Int) 351 | g.GCD(x, y, a, n) 352 | if g.Cmp(bigOne) != 0 { 353 | return 354 | } 355 | if x.Cmp(bigOne) < 0 { 356 | x.Add(x, n) 357 | } 358 | return x, true 359 | } 360 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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Interpretation of Sections 15 and 16. 613 | 614 | If the disclaimer of warranty and limitation of liability provided 615 | above cannot be given local legal effect according to their terms, 616 | reviewing courts shall apply local law that most closely approximates 617 | an absolute waiver of all civil liability in connection with the 618 | Program, unless a warranty or assumption of liability accompanies a 619 | copy of the Program in return for a fee. 620 | 621 | END OF TERMS AND CONDITIONS 622 | 623 | How to Apply These Terms to Your New Programs 624 | 625 | If you develop a new program, and you want it to be of the greatest 626 | possible use to the public, the best way to achieve this is to make it 627 | free software which everyone can redistribute and change under these terms. 628 | 629 | To do so, attach the following notices to the program. It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | --------------------------------------------------------------------------------