网Js RSA加密,后端（Asp.Net）解码（非对称加解密）
Posted 三瑞
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前言
RSA加解密知识自行百度了解决一下
1、取得公钥与私钥方法
下载后将其发布成网站进入：http://127.0.0.1:3000/demo/index.html （各自服务器站口不一样自行）
这样就得到一公钥和私钥
另一种生成公钥与私钥的方法如下：引用 https://blog.csdn.net/qq_39081974/article/details/81059022
======================================Begin======================================
1. OpenSSL官网
官方下载地址： https://www.openssl.org/source/
2. Windows安装方法
OpenSSL官网没有提供windows版本的安装包，可以选择其他开源平台提供的工具。例如 http://slproweb.com/products/Win32OpenSSL.html
以该工具为例，安装步骤和使用方法如下：
2.1 选择32位或者64位合适的版本下载，例如Win64OpenSSL_Light-1_0_2h.exe：
2.2 设置环境变量，例如工具安装在C:\\OpenSSL-Win64，则将C:\\OpenSSL-Win64\\bin；复制到Path中
2.3 打开命令行程序cmd（以管理员身份运行），运行以下命令:
这里路径就是保存地址
利用 openssl 生成公钥私钥
生成公钥： openssl genrsa -out rsa_private_key.pem 1024
生成私钥: openssl rsa -in rsa_private_key.pem -pubout -out rsa_public_key.pem
======================================End=======================================
2、实践（引用：https://www.jb51.net/article/117127.htm）
参数传递的+号处理，在传输时会把+变成空格，不处理后端就报错了。
1、前端代码
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<!DOCTYPE html><html><head> <meta name="viewport" content="width=device-width" /> <title>Login</title> <script src="jquery-1.10.2.min.js"></script> <script src="jsencrypt.min.js"></script> $(function () { var encrypt = new JSEncrypt(); encrypt.setPublicKey($("#tra").val()); var data = encrypt.encrypt("123456789"); alert(data); $("#btn").click(function () { $.ajax({ url: \'@Url.Action("Login")\', data: "pwd=" + encodeURI(data).replace(/\\+/g, \'%2B\'), //+号的处理：因为数据在网络上传输时，非字母数字字符都将被替换成百分号（%）后跟两位十六进制数，而base64编码在传输到后端的时候，+会变成空格，因此先替换掉。后端再替换回来 type: \'post\', success: function (msg) { alert(msg); } }); }); }); </script></head><body> <div> <input type="button" id="btn" value="点我" /> <textarea id="tra" rows="15" cols="65"> MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCa4KHNwDX44gGmmIAtRu4gjVYtGWZzcm4t+1wjUD4dn7fMLPvuK7ai4UrfDeEJE1RPwudJw+lJ6crql8wSIg7/DbTl G3ihsCT6dT9H5B9OoeR7K9VWUesaW/iyVL6HXiYOANabW14pvJATDmdq91Tfgp6P SQyvdfiRdV4r07crpQIDAQAB </textarea> <hr/> 注意+号的处理 </div></body></html> |
2、后端代码
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public class IndexController : Controller{ public ActionResult Login() { return View(); } [HttpPost] public ActionResult Login(string pwd) { //密钥格式要生成pkcs#1格式的 而不是pkcs#8格式的 string privateKey = @"MIICWwIBAAKBgQCa4KHNwDX44gGmmIAtRu4gjVYtGWZzcm4t+1wjUD4dn7fMLPvuK7ai4UrfDeEJE1RPwudJw+lJ6crql8wSIg7/DbTlG3ihsCT6dT9H5B9OoeR7K9VWUesaW/iyVL6HXiYOANabW14pvJATDmdq91Tfgp6PSQyvdfiRdV4r07crpQIDAQABAoGABb+3gdb+qeG0b1CogVsT/7//UOaTzPk/FGneKQQTf4SsN+H7lVhTYTG9ARFCJyoWg8IXqmn2ljhywHPTWWD2RCZIn2sYT1sVkGb70EgHGQLBraFHElmw+DsVJ+nDfBCfMrJ1TYXlwigjRkaueaoGgG8LdR8XD+Xs5LersPLjZgECQQCguSB7C4wF6oSwEDmwNF8ffT5cQc1U2OIq6NBG8rafrjb7LsjhOd03pmY7i4LbW3Vvq4AhQpJEdF1Cvd+Sk/BBAkEA9rBhqnyumV09zFEomSX3zZu+bdhTzM4bJDfEa95swp1gANCVvF/tDCnlBf51EhCWdeGSpARPUkQnXrYfFUDiZQJAAZEshuaa6+fYeVr/JP+tucHf3MhrdxtSQTbZ6QcuzqnFMXfIT6HfzU4bCxOWKAthPsB+VFSw1mgIDMGLL4OvwQJAJlVyV9PYLezXVZCnBmVoBINXLCqZmxHMFey0kS6XKAbcjEPdgNBHPcSk2jGYb540Q00yRFqHGPmORKF4Yw0aIQJAd5JRtD3z2MgP/vPoKHJNHqY8bboVcmwqVAm6xCZoTCZzjNV1Cnsdf4wBV3LCDzYBy+xR4qYNUy5CFXN+8WzzAA=="; try { RSACryptoServiceProvider rsaCryptoServiceProvider = CreateRsaProviderFromPrivateKey(privateKey); //把+号，再替换回来 byte[] res = rsaCryptoServiceProvider.Decrypt(Convert.FromBase64String(pwd.Replace("%2B","+")), false); return Content(Encoding.UTF8.GetString(res)); } catch (Exception exception) { } return Content(""); } private RSACryptoServiceProvider CreateRsaProviderFromPrivateKey(string privateKey) { var privateKeyBits = System.Convert.FromBase64String(privateKey); var RSA = new RSACryptoServiceProvider(); var RSAparams = new RSAParameters(); using (BinaryReader binr = new BinaryReader(new MemoryStream(privateKeyBits))) { byte bt = 0; ushort twobytes = 0; twobytes = binr.ReadUInt16(); if (twobytes == 0x8130) binr.ReadByte(); else if (twobytes == 0x8230) binr.ReadInt16(); else throw new Exception("Unexpected value read binr.ReadUInt16()"); twobytes = binr.ReadUInt16(); if (twobytes != 0x0102) throw new Exception("Unexpected version"); bt = binr.ReadByte(); if (bt != 0x00) throw new Exception("Unexpected value read binr.ReadByte()"); RSAparams.Modulus = binr.ReadBytes(GetIntegerSize(binr)); RSAparams.Exponent = binr.ReadBytes(GetIntegerSize(binr)); RSAparams.D = binr.ReadBytes(GetIntegerSize(binr)); RSAparams.P = binr.ReadBytes(GetIntegerSize(binr)); RSAparams.Q = binr.ReadBytes(GetIntegerSize(binr)); RSAparams.DP = binr.ReadBytes(GetIntegerSize(binr)); RSAparams.DQ = binr.ReadBytes(GetIntegerSize(binr)); RSAparams.InverseQ = binr.ReadBytes(GetIntegerSize(binr)); } RSA.ImportParameters(RSAparams); return RSA; } private int GetIntegerSize(BinaryReader binr) { byte bt = 0; byte lowbyte = 0x00; byte highbyte = 0x00; int count = 0; bt = binr.ReadByte(); if (bt != 0x02) return 0; bt = binr.ReadByte(); if (bt == 0x81) count = binr.ReadByte(); else if (bt == 0x82) { highbyte = binr.ReadByte(); lowbyte = binr.ReadByte(); byte[] modint = { lowbyte, highbyte, 0x00, 0x00 }; count = BitConverter.ToInt32(modint, 0); } else { count = bt; } while (binr.ReadByte() == 0x00) { count -= 1; } binr.BaseStream.Seek(-1, SeekOrigin.Current); return count; }} |
测试源码在下面GitHub上有（可以给我留言）
https://github.com/xiaoruilin/EncryptionDecrypt
加解密算法：
using System; using System.Collections.Generic; using System.IO; using System.Linq; using System.Security.Cryptography; using System.Text; using System.Threading.Tasks; namespace Common { public class RSA { /// <summary> /// RSA公钥加密 /// </summary> /// <param name="publickey">公钥</param> /// <param name="content">待加密字符串</param> /// <param name="input_charset">编码格式，UTF-8</param> /// <returns></returns> public static string RasEncrypt(string publickey, string content, string input_charset) { RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(); byte[] cipherbytes; rsa.ImportParameters(ConvertFromPublicKey(publickey)); cipherbytes = rsa.Encrypt(Encoding.GetEncoding(input_charset).GetBytes(content), false); return Convert.ToBase64String(cipherbytes); } /// <summary> /// RSA私钥解密 /// </summary> /// <param name="resData">RSA加密后字符串</param> /// <param name="privateKey">私钥</param> /// <param name="input_charset">编码格式，UTF-8</param> /// <returns>明文</returns> public static string RsaDecrypt(string resData, string privateKey, string input_charset) { byte[] DataToDecrypt = Convert.FromBase64String(resData); string result = ""; for (int j = 0; j < DataToDecrypt.Length / 128; j++) { byte[] buf = new byte[128]; for (int i = 0; i < 128; i++) { buf[i] = DataToDecrypt[i + 128 * j]; } result += decrypt(buf, privateKey, input_charset); } return result; } #region 内部方法 private static string decrypt(byte[] data, string privateKey, string input_charset) { string result = ""; RSACryptoServiceProvider rsa = DecodePemPrivateKey(privateKey); using (var sh = SHA1.Create()) { byte[] source = rsa.Decrypt(data, false); char[] asciiChars = new char[Encoding.GetEncoding(input_charset).GetCharCount(source, 0, source.Length)]; Encoding.GetEncoding(input_charset).GetChars(source, 0, source.Length, asciiChars, 0); result = new string(asciiChars); return result; } } private static RSACryptoServiceProvider DecodePemPrivateKey(String pemstr) { RSACryptoServiceProvider rsa = DecodeRSAPrivateKey(Convert.FromBase64String(pemstr)); return rsa; } private static RSACryptoServiceProvider DecodeRSAPrivateKey(byte[] privkey) { byte[] MODULUS, E, D, P, Q, DP, DQ, IQ; // --------- Set up stream to decode the asn.1 encoded RSA private key ------ MemoryStream mem = new MemoryStream(privkey); BinaryReader binr = new BinaryReader(mem); //wrap Memory Stream with BinaryReader for easy reading byte bt = 0; ushort twobytes = 0; int elems = 0; try { twobytes = binr.ReadUInt16(); if (twobytes == 0x8130) //data read as little endian order (actual data order for Sequence is 30 81) binr.ReadByte(); //advance 1 byte else if (twobytes == 0x8230) binr.ReadInt16(); //advance 2 bytes else return null; twobytes = binr.ReadUInt16(); if (twobytes != 0x0102) //version number return null; bt = binr.ReadByte(); if (bt != 0x00) return null; //------ all private key components are Integer sequences ---- elems = GetIntegerSize(binr); MODULUS = binr.ReadBytes(elems); elems = GetIntegerSize(binr); E = binr.ReadBytes(elems); elems = GetIntegerSize(binr); D = binr.ReadBytes(elems); elems = GetIntegerSize(binr); P = binr.ReadBytes(elems); elems = GetIntegerSize(binr); Q = binr.ReadBytes(elems); elems = GetIntegerSize(binr); DP = binr.ReadBytes(elems); elems = GetIntegerSize(binr); DQ = binr.ReadBytes(elems); elems = GetIntegerSize(binr); IQ = binr.ReadBytes(elems); // ------- create RSACryptoServiceProvider instance and initialize with public key ----- CspParameters CspParameters = new CspParameters(); CspParameters.Flags = CspProviderFlags.UseMachineKeyStore; RSACryptoServiceProvider RSA = new RSACryptoServiceProvider(1024, CspParameters); RSAParameters RSAparams = new RSAParameters(); RSAparams.Modulus = MODULUS; RSAparams.Exponent = E; RSAparams.D = D; RSAparams.P = P; RSAparams.Q = Q; RSAparams.DP = DP; RSAparams.DQ = DQ; RSAparams.InverseQ = IQ; RSA.ImportParameters(RSAparams); return RSA; } catch { return null; } finally { binr.Dispose(); } } private static int GetIntegerSize(BinaryReader binr) { byte bt = 0; byte lowbyte = 0x00; byte highbyte = 0x00; int count = 0; bt = binr.ReadByte(); if (bt != 0x02) //expect integer return 0; bt = binr.ReadByte(); if (bt == 0x81) count = binr.ReadByte(); // data size in next byte else if (bt == 0x82) { highbyte = binr.ReadByte(); // data size in next 2 bytes lowbyte = binr.ReadByte(); byte[] modint = { lowbyte, highbyte, 0x00, 0x00 }; count = BitConverter.ToInt32(modint, 0); } else { count = bt; // we already have the data size } while (binr.ReadByte() == 0x00) { //remove high order zeros in data count -= 1; } binr.BaseStream.Seek(-1, SeekOrigin.Current); //last ReadByte wasn\'t a removed zero, so back up a byte return count; } #endregion #region 生成的Pem private static RSAParameters ConvertFromPublicKey(string pemFileConent) { if (string.IsNullOrEmpty(pemFileConent)) { throw new ArgumentNullException("pemFileConent", "This arg cann\'t be empty."); } pemFileConent = pemFileConent.Replace("-----BEGIN PUBLIC KEY-----", "").Replace("-----END PUBLIC KEY-----", "").Replace("\\n", "").Replace("\\r", ""); byte[] keyData = Convert.FromBase64String(pemFileConent); bool keySize1024 = (keyData.Length == 162); bool keySize2048 = (keyData.Length == 294); if (!(keySize1024 || keySize2048)) { throw new ArgumentException("pem file content is incorrect, Only support the key size is 1024 or 2048"); } byte[] pemModulus = (keySize1024 ? new byte[128] : new byte[256]); byte[] pemPublicExponent = new byte[3]; Array.Copy(keyData, (keySize1024 ? 29 : 33), pemModulus, 0, (keySize1024 ? 128 : 256)); Array.Copy(keyData, (keySize1024 ? 159 : 291), pemPublicExponent, 0, 3); RSAParameters para = new RSAParameters(); para.Modulus = pemModulus; para.Exponent = pemPublicExponent; return para; } #endregion } }
加密参数过长？https://www.jianshu.com/p/444011941cac
布署：
System.Security.Cryptography.CryptographicException: 系统找不到指定的文件。
在 System.Security.Cryptography.Utils.CreateProvHandle(CspParameters parameters, Boolean randomKeyContainer)
在 System.Security.Cryptography.RSACryptoServiceProvider.ImportParamete以上是关于网Js RSA加密,后端（Asp.Net）解码（非对称加解密）的主要内容，如果未能解决你的问题，请参考以下文章