using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.IO; using System.Security.Cryptography; namespace HelloWord.RSA { /// <summary> /// 类名:RSAFromPkcs8 /// 功能:RSA加密、解密、签名、验签 (支持1024位和2048位私钥) /// 详细:该类对Java生成的密钥进行解密和签名以及验签专用类,不需要修改 /// 版本:3.0 /// 日期:2013-07-08 /// 说明: /// 以下代码只是为了方便商户测试而提供的样例代码,商户可以根据自己网站的需要,按照技术文档编写,并非一定要使用该代码。 /// </summary> public sealed class RSAFromPkcs8 { /** * RSA最大解密密文大小 * 注意:这个和密钥长度有关系, 公式= 密钥长度 / 8 */ private const int MAX_DECRYPT_BLOCK = 128; /// <summary> /// 签名 /// </summary> /// <param name="content">待签名字符串</param> /// <param name="privateKey">私钥</param> /// <param name="input_charset">编码格式</param> /// <returns>签名后字符串</returns> public static string sign(string content, string privateKey, string input_charset) { byte[] Data = Encoding.GetEncoding(input_charset).GetBytes(content); RSACryptoServiceProvider rsa = DecodePemPrivateKey(privateKey); SHA1 sh = new SHA1CryptoServiceProvider(); byte[] signData = rsa.SignData(Data, sh); return Convert.ToBase64String(signData); } /// <summary> /// 验签 /// </summary> /// <param name="content">待验签字符串</param> /// <param name="signedString">签名</param> /// <param name="publicKey">公钥</param> /// <param name="input_charset">编码格式</param> /// <returns>true(通过),false(不通过)</returns> public static bool verify(string content, string signedString, string publicKey, string input_charset) { bool result = false; byte[] Data = Encoding.GetEncoding(input_charset).GetBytes(content); byte[] data = Convert.FromBase64String(signedString); RSAParameters paraPub = ConvertFromPublicKey(publicKey); RSACryptoServiceProvider rsaPub = new RSACryptoServiceProvider(); rsaPub.ImportParameters(paraPub); SHA1 sh = new SHA1CryptoServiceProvider(); result = rsaPub.VerifyData(Data, sh, data); return result; } /// <summary> /// 加密 /// </summary> /// <param name="resData">需要加密的字符串</param> /// <param name="publicKey">公钥</param> /// <param name="input_charset">编码格式</param> /// <returns>明文</returns> public static string encryptData(string resData, string publicKey, string input_charset) { byte[] DataToEncrypt = Encoding.ASCII.GetBytes(resData); string result = encrypt(DataToEncrypt, publicKey, input_charset); return result; } /// <summary> /// 解密 /// </summary> /// <param name="resData">加密字符串</param> /// <param name="privateKey">私钥</param> /// <param name="input_charset">编码格式</param> /// <returns>明文</returns> public static string decryptData(string resData, string privateKey, string input_charset) { byte[] DataToDecrypt = Convert.FromBase64String(resData); string result = ""; for (int j = 0; j < DataToDecrypt.Length / MAX_DECRYPT_BLOCK; j++) { byte[] buf = new byte[MAX_DECRYPT_BLOCK]; for (int i = 0; i < MAX_DECRYPT_BLOCK; i++) { buf[i] = DataToDecrypt[i + MAX_DECRYPT_BLOCK * j]; } result += decrypt(buf, privateKey, input_charset); } return result; } #region 内部方法 private static string encrypt(byte[] data, string publicKey, string input_charset) { RSACryptoServiceProvider rsa = DecodePemPublicKey(publicKey); SHA1 sh = new SHA1CryptoServiceProvider(); byte[] result = rsa.Encrypt(data, false); return Convert.ToBase64String(result); } private static string decrypt(byte[] data, string privateKey, string input_charset) { string result = ""; RSACryptoServiceProvider rsa = DecodePemPrivateKey(privateKey); //--- Edit for testing by lzyan --- //RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(); //RSAParameters paraPri = ConvertFromPrivateKey(privateKey); //rsa.ImportParameters(paraPri); //--- Edit End --- SHA1 sh = new SHA1CryptoServiceProvider(); 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); //result = ASCIIEncoding.ASCII.GetString(source); return result; } private static RSACryptoServiceProvider DecodePemPublicKey(String pemstr) { byte[] pkcs8publickkey; pkcs8publickkey = Convert.FromBase64String(pemstr); if (pkcs8publickkey != null) { RSACryptoServiceProvider rsa = DecodeRSAPublicKey(pkcs8publickkey); return rsa; } else return null; } private static RSACryptoServiceProvider DecodePemPrivateKey(String pemstr) { byte[] pkcs8privatekey; pkcs8privatekey = Convert.FromBase64String(pemstr); if (pkcs8privatekey != null) { RSACryptoServiceProvider rsa = DecodePrivateKeyInfo(pkcs8privatekey); return rsa; } else return null; } private static RSACryptoServiceProvider DecodePrivateKeyInfo(byte[] pkcs8) { byte[] SeqOID = { 0x30, 0x0D, 0x06, 0x09, 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x01, 0x01, 0x05, 0x00 }; byte[] seq = new byte[15]; MemoryStream mem = new MemoryStream(pkcs8); int lenstream = (int)mem.Length; BinaryReader binr = new BinaryReader(mem); //wrap Memory Stream with BinaryReader for easy reading byte bt = 0; ushort twobytes = 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; bt = binr.ReadByte(); if (bt != 0x02) return null; twobytes = binr.ReadUInt16(); if (twobytes != 0x0001) return null; seq = binr.ReadBytes(15); //read the Sequence OID if (!CompareBytearrays(seq, SeqOID)) //make sure Sequence for OID is correct return null; bt = binr.ReadByte(); if (bt != 0x04) //expect an Octet string return null; bt = binr.ReadByte(); //read next byte, or next 2 bytes is 0x81 or 0x82; otherwise bt is the byte count if (bt == 0x81) binr.ReadByte(); else if (bt == 0x82) binr.ReadUInt16(); //------ at this stage, the remaining sequence should be the RSA private key byte[] rsaprivkey = binr.ReadBytes((int)(lenstream - mem.Position)); RSACryptoServiceProvider rsacsp = DecodeRSAPrivateKey(rsaprivkey); return rsacsp; } catch (Exception) { return null; } finally { binr.Close(); } } private static bool CompareBytearrays(byte[] a, byte[] b) { if (a.Length != b.Length) return false; int i = 0; foreach (byte c in a) { if (c != b[i]) return false; i++; } return true; } private static RSACryptoServiceProvider DecodeRSAPublicKey(byte[] publickey) { // encoded OID sequence for PKCS #1 rsaEncryption szOID_RSA_RSA = "1.2.840.113549.1.1.1" byte[] SeqOID = { 0x30, 0x0D, 0x06, 0x09, 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x01, 0x01, 0x05, 0x00 }; byte[] seq = new byte[15]; // --------- Set up stream to read the asn.1 encoded SubjectPublicKeyInfo blob ------ MemoryStream mem = new MemoryStream(publickey); BinaryReader binr = new BinaryReader(mem); //wrap Memory Stream with BinaryReader for easy reading byte bt = 0; ushort twobytes = 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; seq = binr.ReadBytes(15); //read the Sequence OID if (!CompareBytearrays(seq, SeqOID)) //make sure Sequence for OID is correct return null; twobytes = binr.ReadUInt16(); if (twobytes == 0x8103) //data read as little endian order (actual data order for Bit String is 03 81) binr.ReadByte(); //advance 1 byte else if (twobytes == 0x8203) binr.ReadInt16(); //advance 2 bytes else return null; bt = binr.ReadByte(); if (bt != 0x00) //expect null byte next return null; 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(); byte lowbyte = 0x00; byte highbyte = 0x00; if (twobytes == 0x8102) //data read as little endian order (actual data order for Integer is 02 81) lowbyte = binr.ReadByte(); // read next bytes which is bytes in modulus else if (twobytes == 0x8202) { highbyte = binr.ReadByte(); //advance 2 bytes lowbyte = binr.ReadByte(); } else return null; byte[] modint = { lowbyte, highbyte, 0x00, 0x00 }; //reverse byte order since asn.1 key uses big endian order int modsize = BitConverter.ToInt32(modint, 0); byte firstbyte = binr.ReadByte(); binr.BaseStream.Seek(-1, SeekOrigin.Current); if (firstbyte == 0x00) { //if first byte (highest order) of modulus is zero, don't include it binr.ReadByte(); //skip this null byte modsize -= 1; //reduce modulus buffer size by 1 } byte[] modulus = binr.ReadBytes(modsize); //read the modulus bytes if (binr.ReadByte() != 0x02) //expect an Integer for the exponent data return null; int expbytes = (int)binr.ReadByte(); // should only need one byte for actual exponent data (for all useful values) byte[] exponent = binr.ReadBytes(expbytes); // ------- create RSACryptoServiceProvider instance and initialize with public key ----- RSACryptoServiceProvider RSA = new RSACryptoServiceProvider(); RSAParameters RSAKeyInfo = new RSAParameters(); RSAKeyInfo.Modulus = modulus; RSAKeyInfo.Exponent = exponent; RSA.ImportParameters(RSAKeyInfo); return RSA; } catch (Exception) { return null; } finally { binr.Close(); } } 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 ----- RSACryptoServiceProvider RSA = new RSACryptoServiceProvider(); 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) { 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; } #endregion #region 解析.net 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; } /// <summary> /// 将pem格式私钥(1024 or 2048)转换为RSAParameters /// </summary> /// <param name="pemFileConent">pem私钥内容</param> /// <returns>转换得到的RSAParamenters</returns> private static RSAParameters ConvertFromPrivateKey(string pemFileConent) { if (string.IsNullOrEmpty(pemFileConent)) { throw new ArgumentNullException("pemFileConent", "This arg cann't be empty."); } pemFileConent = pemFileConent.Replace("-----BEGIN RSA PRIVATE KEY-----", "").Replace("-----END RSA PRIVATE KEY-----", "").Replace("\n", "").Replace("\r", ""); byte[] keyData = Convert.FromBase64String(pemFileConent); bool keySize1024 = (keyData.Length == 609 || keyData.Length == 610); bool keySize2048 = (keyData.Length == 1190 || keyData.Length == 1192); if (!(keySize1024 || keySize2048)) { throw new ArgumentException("pem file content is incorrect, Only support the key size is 1024 or 2048"); } int index = (keySize1024 ? 11 : 12); byte[] pemModulus = (keySize1024 ? new byte[128] : new byte[256]); Array.Copy(keyData, index, pemModulus, 0, pemModulus.Length); index += pemModulus.Length; index += 2; byte[] pemPublicExponent = new byte[3]; Array.Copy(keyData, index, pemPublicExponent, 0, 3); index += 3; index += 4; if ((int)keyData[index] == 0) { index++; } byte[] pemPrivateExponent = (keySize1024 ? new byte[128] : new byte[256]); Array.Copy(keyData, index, pemPrivateExponent, 0, pemPrivateExponent.Length); index += pemPrivateExponent.Length; index += (keySize1024 ? ((int)keyData[index + 1] == 64 ? 2 : 3) : ((int)keyData[index + 2] == 128 ? 3 : 4)); byte[] pemPrime1 = (keySize1024 ? new byte[64] : new byte[128]); Array.Copy(keyData, index, pemPrime1, 0, pemPrime1.Length); index += pemPrime1.Length; index += (keySize1024 ? ((int)keyData[index + 1] == 64 ? 2 : 3) : ((int)keyData[index + 2] == 128 ? 3 : 4)); byte[] pemPrime2 = (keySize1024 ? new byte[64] : new byte[128]); Array.Copy(keyData, index, pemPrime2, 0, pemPrime2.Length); index += pemPrime2.Length; index += (keySize1024 ? ((int)keyData[index + 1] == 64 ? 2 : 3) : ((int)keyData[index + 2] == 128 ? 3 : 4)); byte[] pemExponent1 = (keySize1024 ? new byte[64] : new byte[128]); Array.Copy(keyData, index, pemExponent1, 0, pemExponent1.Length); index += pemExponent1.Length; index += (keySize1024 ? ((int)keyData[index + 1] == 64 ? 2 : 3) : ((int)keyData[index + 2] == 128 ? 3 : 4)); byte[] pemExponent2 = (keySize1024 ? new byte[64] : new byte[128]); Array.Copy(keyData, index, pemExponent2, 0, pemExponent2.Length); index += pemExponent2.Length; index += (keySize1024 ? ((int)keyData[index + 1] == 64 ? 2 : 3) : ((int)keyData[index + 2] == 128 ? 3 : 4)); byte[] pemCoefficient = (keySize1024 ? new byte[64] : new byte[128]); Array.Copy(keyData, index, pemCoefficient, 0, pemCoefficient.Length); RSAParameters para = new RSAParameters(); para.Modulus = pemModulus; para.Exponent = pemPublicExponent; para.D = pemPrivateExponent; para.P = pemPrime1; para.Q = pemPrime2; para.DP = pemExponent1; para.DQ = pemExponent2; para.InverseQ = pemCoefficient; return para; } #endregion //extract valid content from PEM file public static string extractFromPemFile(string filePath) { string result = ""; string COMMENT_BEGIN_FLAG = "-----"; //============= //从头到尾以流的方式读出文本文件, 该方法会一行一行读出文本 using (System.IO.StreamReader sr = new System.IO.StreamReader(filePath, Encoding.UTF8)) { string str; StringBuilder sb = new StringBuilder(); while ((str = sr.ReadLine()) != null) { if (!str.StartsWith(COMMENT_BEGIN_FLAG)) { sb.Append(str); } } result = sb.ToString(); } return result; } //extract valid content from PEM format string public static string extractFromPemFormat(string input) { string result = ""; string COMMENT_BEGIN_FLAG = "-----"; string[] splitFlagArray = { "\r", "\n" }; string[] itemArray = input.Split(splitFlagArray, StringSplitOptions.RemoveEmptyEntries); StringBuilder sb = new StringBuilder(); foreach (string item in itemArray) { if (!item.StartsWith(COMMENT_BEGIN_FLAG)) { sb.Append(item); } } result = sb.ToString(); return result; } } }
using System; using System.Collections.Generic; using System.Linq; using System.Text; using CSCMDemo; using CSCMDemo2; using HelloWord.RSA; using Ctrip.Cryptography; using com.ctrip.sec.crypto; namespace HelloWord { class Program { static string UTF8 = "utf-8"; static void Main(string[] args) { //-- custom use --- //testRSAFromPkcs1(); //testRSAFromPkcs8(); //testRSAFromPkcs8_file(); testRSAFromPkcs8_SOA(); //--- use provided dll --- //testRsaWithSslcode(); } //test RSA sign static void testRSAFromPkcs1() { string data = "abc"; string privateKeyPem = "../../RSA/private.key"; string sign = RSAFromPkcs1.RSASign(data, privateKeyPem); Console.WriteLine("sign=" + sign); // 窗口暂停,等待按键 Console.ReadKey(); } //test RSA(pkcs#8) static void testRSAFromPkcs8() { string data = "abc"; string privateKey = "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"; string sign = RSAFromPkcs8.sign(data, privateKey, UTF8); Console.WriteLine("data=" + data); Console.WriteLine("===================="); Console.WriteLine("sign=" + sign); Console.WriteLine("===================="); string publicKey = "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCnOi3RwVTiB0LTCV0nPfigVqyROPbBA/Qkz21DExN3rnlziQ7vjwc1EJ9n+xH/o/BNc/j6yslYMdVPDLBOZqBUiaHH2w0+DWStAZVN51ZsYdceLYh1xc9WwNgwFk7Y1ME0uVjgOiKq1nhnPOPe3GvDvsS3E+2SqNN8+NfcaCeY8QIDAQAB"; bool verifyResult = RSAFromPkcs8.verify(data, sign, publicKey, UTF8); Console.WriteLine("verifyResult=" + verifyResult); // 窗口暂停,等待按键 Console.ReadKey(); } //test RSA(pkcs#8) from file static void testRSAFromPkcs8_file() { string data = "abc"; string privateKeyPem = "../../RSA/private_pkcs8.key"; string privateKey = RSAFromPkcs8.extractFromPemFile(privateKeyPem); string sign = RSAFromPkcs8.sign(data, privateKey, UTF8); Console.WriteLine("data=" + data); Console.WriteLine("===================="); Console.WriteLine("sign=" + sign); Console.WriteLine("===================="); string publicKeyPem = "../../RSA/public.key"; string publicKey = RSAFromPkcs8.extractFromPemFile(publicKeyPem); bool verifyResult = RSAFromPkcs8.verify(data, sign, publicKey, UTF8); Console.WriteLine("verifyResult=" + verifyResult); // 窗口暂停,等待按键 Console.ReadKey(); } //test RSA(pkcs#8) via SOA static void testRSAFromPkcs8_SOA() { // 准备测试sslcode 1024 2048 string publicSslCode = "KI00000000001530"; //==> 返回的公钥是java格式的 //OH00000000000119, KI00000000001530, UE00000000001532 //AX00000000001436 [bad] string privateSslCode = "UL00000000001531"; //==> 返回的私钥是java格式的 //JY00000000000120, UL00000000001531, ZT00000000001533 //SO00000000001437 // 准备测试字符串 string data = "abc"; Demo2 demo = new Demo2(); string privateKey = demo.GetSign(privateSslCode); privateKey = RSAFromPkcs8.extractFromPemFormat(privateKey); string sign = RSAFromPkcs8.sign(data, privateKey, UTF8); Console.WriteLine("data=" + data); Console.WriteLine("===================="); Console.WriteLine("sign=" + sign); Console.WriteLine("===================="); string publicKey = demo.GetSign(publicSslCode); publicKey = RSAFromPkcs8.extractFromPemFormat(publicKey); bool verifyResult = RSAFromPkcs8.verify(data, sign, publicKey, UTF8); Console.WriteLine("verifyResult=" + verifyResult); Console.WriteLine("===================="); //-------------- string encData = RSAFromPkcs8.encryptData(data, publicKey, UTF8); Console.WriteLine("encData=" + encData); string decData = RSAFromPkcs8.decryptData(encData, privateKey, UTF8); Console.WriteLine("decData=" + decData); Console.WriteLine("===================="); // 窗口暂停,等待按键 Console.ReadKey(); } } }
转自:
http://blog.csdn.net/zzzili/article/details/73739797
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Security.Cryptography;
namespace HelloWord.RSA
{
/// <summary>
/// 类名:RSAFromPkcs8
/// 功能:RSA加密、解密、签名、验签 (支持1024位和2048位私钥)
/// 详细:该类对Java生成的密钥进行解密和签名以及验签专用类,不需要修改
/// 版本:3.0
/// 日期:2013-07-08
/// 说明:
/// 以下代码只是为了方便商户测试而提供的样例代码,商户可以根据自己网站的需要,按照技术文档编写,并非一定要使用该代码。
/// </summary>
public sealed class RSAFromPkcs8
{
/**
* RSA最大解密密文大小
* 注意:这个和密钥长度有关系, 公式= 密钥长度 / 8
*/
private const int MAX_DECRYPT_BLOCK = 128;
/// <summary>
/// 签名
/// </summary>
/// <param name="content">待签名字符串</param>
/// <param name="privateKey">私钥</param>
/// <param name="input_charset">编码格式</param>
/// <returns>签名后字符串</returns>
public static string sign(string content, string privateKey, string input_charset)
{
byte[] Data = Encoding.GetEncoding(input_charset).GetBytes(content);
RSACryptoServiceProvider rsa = DecodePemPrivateKey(privateKey);
SHA1 sh = new SHA1CryptoServiceProvider();
byte[] signData = rsa.SignData(Data, sh);
return Convert.ToBase64String(signData);
}
/// <summary>
/// 验签
/// </summary>
/// <param name="content">待验签字符串</param>
/// <param name="signedString">签名</param>
/// <param name="publicKey">公钥</param>
/// <param name="input_charset">编码格式</param>
/// <returns>true(通过),false(不通过)</returns>
public static bool verify(string content, string signedString, string publicKey, string input_charset)
{
bool result = false;
byte[] Data = Encoding.GetEncoding(input_charset).GetBytes(content);
byte[] data = Convert.FromBase64String(signedString);
RSAParameters paraPub = ConvertFromPublicKey(publicKey);
RSACryptoServiceProvider rsaPub = new RSACryptoServiceProvider();
rsaPub.ImportParameters(paraPub);
SHA1 sh = new SHA1CryptoServiceProvider();
result = rsaPub.VerifyData(Data, sh, data);
return result;
}
/// <summary>
/// 加密
/// </summary>
/// <param name="resData">需要加密的字符串</param>
/// <param name="publicKey">公钥</param>
/// <param name="input_charset">编码格式</param>
/// <returns>明文</returns>
public static string encryptData(string resData, string publicKey, string input_charset)
{
byte[] DataToEncrypt = Encoding.ASCII.GetBytes(resData);
string result = encrypt(DataToEncrypt, publicKey, input_charset);
return result;
}
/// <summary>
/// 解密
/// </summary>
/// <param name="resData">加密字符串</param>
/// <param name="privateKey">私钥</param>
/// <param name="input_charset">编码格式</param>
/// <returns>明文</returns>
public static string decryptData(string resData, string privateKey, string input_charset)
{
byte[] DataToDecrypt = Convert.FromBase64String(resData);
string result = "";
for (int j = 0; j < DataToDecrypt.Length / MAX_DECRYPT_BLOCK; j++)
{
byte[] buf = new byte[MAX_DECRYPT_BLOCK];
for (int i = 0; i < MAX_DECRYPT_BLOCK; i++)
{
buf[i] = DataToDecrypt[i + MAX_DECRYPT_BLOCK * j];
}
result += decrypt(buf, privateKey, input_charset);
}
return result;
}
#region 内部方法
private static string encrypt(byte[] data, string publicKey, string input_charset)
{
RSACryptoServiceProvider rsa = DecodePemPublicKey(publicKey);
SHA1 sh = new SHA1CryptoServiceProvider();
byte[] result = rsa.Encrypt(data, false);
return Convert.ToBase64String(result);
}
private static string decrypt(byte[] data, string privateKey, string input_charset)
{
string result = "";
RSACryptoServiceProvider rsa = DecodePemPrivateKey(privateKey);
//--- Edit for testing by lzyan ---
//RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
//RSAParameters paraPri = ConvertFromPrivateKey(privateKey);
//rsa.ImportParameters(paraPri);
//--- Edit End ---
SHA1 sh = new SHA1CryptoServiceProvider();
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);
//result = ASCIIEncoding.ASCII.GetString(source);
return result;
}
private static RSACryptoServiceProvider DecodePemPublicKey(String pemstr)
{
byte[] pkcs8publickkey;
pkcs8publickkey = Convert.FromBase64String(pemstr);
if (pkcs8publickkey != null)
{
RSACryptoServiceProvider rsa = DecodeRSAPublicKey(pkcs8publickkey);
return rsa;
}
else
return null;
}
private static RSACryptoServiceProvider DecodePemPrivateKey(String pemstr)
{
byte[] pkcs8privatekey;
pkcs8privatekey = Convert.FromBase64String(pemstr);
if (pkcs8privatekey != null)
{
RSACryptoServiceProvider rsa = DecodePrivateKeyInfo(pkcs8privatekey);
return rsa;
}
else
return null;
}
private static RSACryptoServiceProvider DecodePrivateKeyInfo(byte[] pkcs8)
{
byte[] SeqOID = { 0x30, 0x0D, 0x06, 0x09, 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x01, 0x01, 0x05, 0x00 };
byte[] seq = new byte[15];
MemoryStream mem = new MemoryStream(pkcs8);
int lenstream = (int)mem.Length;
BinaryReader binr = new BinaryReader(mem); //wrap Memory Stream with BinaryReader for easy reading
byte bt = 0;
ushort twobytes = 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;
bt = binr.ReadByte();
if (bt != 0x02)
return null;
twobytes = binr.ReadUInt16();
if (twobytes != 0x0001)
return null;
seq = binr.ReadBytes(15); //read the Sequence OID
if (!CompareBytearrays(seq, SeqOID)) //make sure Sequence for OID is correct
return null;
bt = binr.ReadByte();
if (bt != 0x04) //expect an Octet string
return null;
bt = binr.ReadByte(); //read next byte, or next 2 bytes is 0x81 or 0x82; otherwise bt is the byte count
if (bt == 0x81)
binr.ReadByte();
else
if (bt == 0x82)
binr.ReadUInt16();
//------ at this stage, the remaining sequence should be the RSA private key
byte[] rsaprivkey = binr.ReadBytes((int)(lenstream - mem.Position));
RSACryptoServiceProvider rsacsp = DecodeRSAPrivateKey(rsaprivkey);
return rsacsp;
}
catch (Exception)
{
return null;
}
finally { binr.Close(); }
}
private static bool CompareBytearrays(byte[] a, byte[] b)
{
if (a.Length != b.Length)
return false;
int i = 0;
foreach (byte c in a)
{
if (c != b[i])
return false;
i++;
}
return true;
}
private static RSACryptoServiceProvider DecodeRSAPublicKey(byte[] publickey)
{
// encoded OID sequence for PKCS #1 rsaEncryption szOID_RSA_RSA = "1.2.840.113549.1.1.1"
byte[] SeqOID = { 0x30, 0x0D, 0x06, 0x09, 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x01, 0x01, 0x05, 0x00 };
byte[] seq = new byte[15];
// --------- Set up stream to read the asn.1 encoded SubjectPublicKeyInfo blob ------
MemoryStream mem = new MemoryStream(publickey);
BinaryReader binr = new BinaryReader(mem); //wrap Memory Stream with BinaryReader for easy reading
byte bt = 0;
ushort twobytes = 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;
seq = binr.ReadBytes(15); //read the Sequence OID
if (!CompareBytearrays(seq, SeqOID)) //make sure Sequence for OID is correct
return null;
twobytes = binr.ReadUInt16();
if (twobytes == 0x8103) //data read as little endian order (actual data order for Bit String is 03 81)
binr.ReadByte(); //advance 1 byte
else if (twobytes == 0x8203)
binr.ReadInt16(); //advance 2 bytes
else
return null;
bt = binr.ReadByte();
if (bt != 0x00) //expect null byte next
return null;
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();
byte lowbyte = 0x00;
byte highbyte = 0x00;
if (twobytes == 0x8102) //data read as little endian order (actual data order for Integer is 02 81)
lowbyte = binr.ReadByte(); // read next bytes which is bytes in modulus
else if (twobytes == 0x8202)
{
highbyte = binr.ReadByte(); //advance 2 bytes
lowbyte = binr.ReadByte();
}
else
return null;
byte[] modint = { lowbyte, highbyte, 0x00, 0x00 }; //reverse byte order since asn.1 key uses big endian order
int modsize = BitConverter.ToInt32(modint, 0);
byte firstbyte = binr.ReadByte();
binr.BaseStream.Seek(-1, SeekOrigin.Current);
if (firstbyte == 0x00)
{ //if first byte (highest order) of modulus is zero, don't include it
binr.ReadByte(); //skip this null byte
modsize -= 1; //reduce modulus buffer size by 1
}
byte[] modulus = binr.ReadBytes(modsize); //read the modulus bytes
if (binr.ReadByte() != 0x02) //expect an Integer for the exponent data
return null;
int expbytes = (int)binr.ReadByte(); // should only need one byte for actual exponent data (for all useful values)
byte[] exponent = binr.ReadBytes(expbytes);
// ------- create RSACryptoServiceProvider instance and initialize with public key -----
RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();
RSAParameters RSAKeyInfo = new RSAParameters();
RSAKeyInfo.Modulus = modulus;
RSAKeyInfo.Exponent = exponent;
RSA.ImportParameters(RSAKeyInfo);
return RSA;
}
catch (Exception)
{
return null;
}
finally { binr.Close(); }
}
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 -----
RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();
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)
{
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;
}
#endregion
#region 解析.net 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;
}
/// <summary>
/// 将pem格式私钥(1024 or 2048)转换为RSAParameters
/// </summary>
/// <param name="pemFileConent">pem私钥内容</param>
/// <returns>转换得到的RSAParamenters</returns>
private static RSAParameters ConvertFromPrivateKey(string pemFileConent)
{
if (string.IsNullOrEmpty(pemFileConent))
{
throw new ArgumentNullException("pemFileConent", "This arg cann't be empty.");
}
pemFileConent = pemFileConent.Replace("-----BEGIN RSA PRIVATE KEY-----", "").Replace("-----END RSA PRIVATE KEY-----", "").Replace("\n", "").Replace("\r", "");
byte[] keyData = Convert.FromBase64String(pemFileConent);
bool keySize1024 = (keyData.Length == 609 || keyData.Length == 610);
bool keySize2048 = (keyData.Length == 1190 || keyData.Length == 1192);
if (!(keySize1024 || keySize2048))
{
throw new ArgumentException("pem file content is incorrect, Only support the key size is 1024 or 2048");
}
int index = (keySize1024 ? 11 : 12);
byte[] pemModulus = (keySize1024 ? new byte[128] : new byte[256]);
Array.Copy(keyData, index, pemModulus, 0, pemModulus.Length);
index += pemModulus.Length;
index += 2;
byte[] pemPublicExponent = new byte[3];
Array.Copy(keyData, index, pemPublicExponent, 0, 3);
index += 3;
index += 4;
if ((int)keyData[index] == 0)
{
index++;
}
byte[] pemPrivateExponent = (keySize1024 ? new byte[128] : new byte[256]);
Array.Copy(keyData, index, pemPrivateExponent, 0, pemPrivateExponent.Length);
index += pemPrivateExponent.Length;
index += (keySize1024 ? ((int)keyData[index + 1] == 64 ? 2 : 3) : ((int)keyData[index + 2] == 128 ? 3 : 4));
byte[] pemPrime1 = (keySize1024 ? new byte[64] : new byte[128]);
Array.Copy(keyData, index, pemPrime1, 0, pemPrime1.Length);
index += pemPrime1.Length;
index += (keySize1024 ? ((int)keyData[index + 1] == 64 ? 2 : 3) : ((int)keyData[index + 2] == 128 ? 3 : 4));
byte[] pemPrime2 = (keySize1024 ? new byte[64] : new byte[128]);
Array.Copy(keyData, index, pemPrime2, 0, pemPrime2.Length);
index += pemPrime2.Length;
index += (keySize1024 ? ((int)keyData[index + 1] == 64 ? 2 : 3) : ((int)keyData[index + 2] == 128 ? 3 : 4));
byte[] pemExponent1 = (keySize1024 ? new byte[64] : new byte[128]);
Array.Copy(keyData, index, pemExponent1, 0, pemExponent1.Length);
index += pemExponent1.Length;
index += (keySize1024 ? ((int)keyData[index + 1] == 64 ? 2 : 3) : ((int)keyData[index + 2] == 128 ? 3 : 4));
byte[] pemExponent2 = (keySize1024 ? new byte[64] : new byte[128]);
Array.Copy(keyData, index, pemExponent2, 0, pemExponent2.Length);
index += pemExponent2.Length;
index += (keySize1024 ? ((int)keyData[index + 1] == 64 ? 2 : 3) : ((int)keyData[index + 2] == 128 ? 3 : 4));
byte[] pemCoefficient = (keySize1024 ? new byte[64] : new byte[128]);
Array.Copy(keyData, index, pemCoefficient, 0, pemCoefficient.Length);
RSAParameters para = new RSAParameters();
para.Modulus = pemModulus;
para.Exponent = pemPublicExponent;
para.D = pemPrivateExponent;
para.P = pemPrime1;
para.Q = pemPrime2;
para.DP = pemExponent1;
para.DQ = pemExponent2;
para.InverseQ = pemCoefficient;
return para;
}
#endregion
//extract valid content from PEM file
public static string extractFromPemFile(string filePath)
{
string result = "";
string COMMENT_BEGIN_FLAG = "-----";
//=============
//从头到尾以流的方式读出文本文件, 该方法会一行一行读出文本
using (System.IO.StreamReader sr = new System.IO.StreamReader(filePath, Encoding.UTF8))
{
string str;
StringBuilder sb = new StringBuilder();
while ((str = sr.ReadLine()) != null)
{
if (!str.StartsWith(COMMENT_BEGIN_FLAG))
{
sb.Append(str);
}
}
result = sb.ToString();
}
return result;
}
//extract valid content from PEM format string
public static string extractFromPemFormat(string input)
{
string result = "";
string COMMENT_BEGIN_FLAG = "-----";
string[] splitFlagArray = { "\r", "\n" };
string[] itemArray = input.Split(splitFlagArray, StringSplitOptions.RemoveEmptyEntries);
StringBuilder sb = new StringBuilder();
foreach (string item in itemArray)
{
if (!item.StartsWith(COMMENT_BEGIN_FLAG))
{
sb.Append(item);
}
}
result = sb.ToString();
return result;
}
}
}
来源:https://www.cnblogs.com/ylz8401/p/8443819.html