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- using Newtonsoft.Json;
- using System;
- using System.Collections.Generic;
- using System.IO;
- using System.Security.Cryptography;
- using System.Text;
- using TEAMModelOS.SDK.Helper.Common.JsonHelper;
- namespace TEAMModelOS.SDK.Extension.JwtAuth.JwtHelper
- {
- public static class RsaHelper
- {
- public static string RSASign(string data, string privateKeyPem)
- {
- RSACryptoServiceProvider rsaCsp = LoadCertificateFile(privateKeyPem);
- byte[] dataBytes = Encoding.UTF8.GetBytes(data);
- byte[] signatureBytes = rsaCsp.SignData(dataBytes, "SHA1");
- return Convert.ToBase64String(signatureBytes);
- }
-
- private static byte[] GetPem(string type, byte[] data)
- {
- string pem = Encoding.UTF8.GetString(data);
- string header = String.Format("-----BEGIN {0}-----\\n", type);
- string footer = String.Format("-----END {0}-----", type);
- int start = pem.IndexOf(header) + header.Length;
- int end = pem.IndexOf(footer, start);
- string base64 = pem.Substring(start, (end - start));
- return Convert.FromBase64String(base64);
- }
- public static string LoadCertificateFileToSting (string filename) {
- FileStream fs = System.IO.File.OpenRead(filename);
- byte[] data = new byte[fs.Length];
- byte[] res = null;
- fs.Read(data, 0, data.Length);
- if (data[0] != 0x30)
- {
- res = GetPem("RSA PRIVATE KEY", data);
- }
- return res.ToJson();
- }
- public static RSACryptoServiceProvider LoadCertificateFile(string filename)
- {
- FileStream fs = System.IO.File.OpenRead(filename);
- byte[] data = new byte[fs.Length];
- byte[] res = null;
- fs.Read(data, 0, data.Length);
- if (data[0] != 0x30)
- {
- res = GetPem("RSA PRIVATE KEY", data);
- }
- try
- {
- string ss= res.ToJson();
- RSACryptoServiceProvider rsa = DecodeRSAPrivateKey(res);
- string s = rsa.ToString();
- return rsa;
- }
- catch (Exception ex)
- {
- }
- return null;
- }
- 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 (Exception ex)
- {
- return null;
- }
- finally
- {
- binr.Close();
- }
- }
- 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;
- }
- }
- }
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