. NET PEM key file generated using OpenSSL [1024 bits]

Using system;using system.text;using system.security.cryptography;using system.web;using System.IO;namespace thinhunan.cnblogs.com.rsautility{public class Pemconverter {//<summary>///Convert PEM format key to Rsapa Rameters//</summary>//<param name= "pemfileconent" &GT;PEM public key contents </param>//<ret Urns> converted rsaparamenters</returns> public static RSAParameters Convertfrompempublickey (String Pemfileconen T) {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); if (Keydata.length < 162) {throw new ArgumentException ("Pem file ContenT is incorrect. ");            byte[] Pemmodulus = new byte[128];            byte[] pempublicexponent = new Byte[3];            Array.copy (KeyData, Pemmodulus, 0, 128);            Array.copy (KeyData, 159, Pempublicexponent, 0, 3);            RSAParameters para = new RSAParameters (); Para.            modulus = Pemmodulus; Para.            Exponent = pempublicexponent;        return para; }///<summary>//Convert PEM format private key to RSAParameters//</summary>//<param name= "PE Mfileconent "&GT;PEM private key content </param>///<returns> convert rsaparamenters</returns> public static R Saparameters Convertfrompemprivatekey (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);            if (Keydata.length < 609) {throw new ArgumentException ("Pem file content is incorrect.");            } int index = 11;            byte[] Pemmodulus = new byte[128];            Array.copy (KeyData, index, Pemmodulus, 0, 128);            Index + = 128;            Index + = 2;//141 byte[] pempublicexponent = new Byte[3];            Array.copy (KeyData, index, pempublicexponent, 0, 3);            Index + = 3;            Index + = 4;//148 byte[] pemprivateexponent = new byte[128];            Array.copy (KeyData, index, pemprivateexponent, 0, 128);            Index + = 128;            Index + = ((int) keydata[index+1] = = 64?2:3);//279 byte[] pemPrime1 = new byte[64];            Array.copy (KeyData, index, PEMPRIME1, 0, 64);            Index + = 64; Index + = ((int) keydata[Index + 1] = = 64?            2:3);//346 byte[] pemPrime2 = new byte[64];            Array.copy (KeyData, index, pemPrime2, 0, 64);            Index + = 64;            Index + = ((int) Keydata[index + 1] = = 2:3);//412/413 byte[] pemExponent1 = new byte[64];            Array.copy (Keydata,index, pemExponent1, 0, 64);            Index + = 64;            Index + = ((int) Keydata[index + 1] = = 2:3);//479/480 byte[] PemExponent2 = new byte[64];            Array.copy (KeyData, index, PemExponent2, 0, 64);            Index + = 64;            Index + = ((int) Keydata[index + 1] = = 2:3);//545/546 byte[] pemcoefficient = new byte[64];            Array.copy (KeyData, index, pemcoefficient, 0, 64);            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; }}} Test Pem for RSAParameters success, using via: Using system;using system.security.cryptography;using system.text;using System . Io;using System.web;namespace thinhunan.cnblogs.com.rsautility{class Program {#region Keys const STR ing publickey =@ "-----BEGIN public KEY-----migfma0gcsqgsib3dqebaquaa4gnadcbiqkbgqdpsdr+w45afhikvotzagk/ Thlffpuzfutghhwkham3h7yvl42j4xhrtr6ieudcl4eke6qiigvysnol3u4sergoeymv1f+cocu9imgnnoicbh1zvw6e8/igt3xayqizjovuwa        /tc/zdds2ihcjfhdbdsouocxecpapywcgqnsh5sqidaqab-----END Public KEY-----"; Const string Privatekey =@ "-----BEGIN RSA PRIVATE KEY-----miicxqibaakbgqdpsdr+w45afhikvotzagk/ Thlffpuzfutghhwkham3h7yvl42j4xhrtr6ieudcl4eke6qiigvysnol3u4sergoeymv1f+cocu9imgnnoicbh1zvw6e8/igt3xayqizjovuwa /tc/zdds2ihcjfhdbdsouocxecpapywcgqnsh5sqidaqabaogbam/jbfs4y5wbmncrmjpqj+uroxvocelrvrc/4kq+zgcvtpwywbagwiuro+ Czcxrvq6bggu362e9hr8f4xfvikemdl4smjbgsda1k71i+/lnnzf6sjidbfq/ja9sk4pyry7a3ikebqnjmknanykugyq1xmcjbuh556foerpahnhx1akea/flrxjsy1z+ ny1rpgdoedqyg6mhwu1jl0yj1sw3or4qgrxhjtegscrkqv0/ajqdkdem7fnkqnmsb+vpd116j6wjbaouny3oowvy2fq32mj6xv+ s2vcg1oseuaeuwvegkgqj9co6100qpj15036aqeedqbjdqs0shferswevtjziap9mcqcemgddjkrnda5cfb0yiq4frchj7a6o90wdahw3fp6lsah59mzfmc6e a0xwhdlpz8stkcmalvnkyprwztz6ctqmcqqc8iwbeay+apvbhhmjg4hjrdpnbwo6mbleud3curzfedftrlu2mevdv20xc6ziy3qtq/ 4fpzzngdzcseuc3km5rakapgkzmwetnwdjmcujbsbrqmffrqobqmpbpe+        GENIQQTTWU1OULHLMUG9EW31WRI2UIXCFCJMHURO6IOQ1VJ4QS-----END RSA PRIVATE KEY-----";                    #endregion static void Main (string[] args) {testsignandverify (); } public static void Testsignandverify () {//sign RSAParameters para = Pe            Mconverter.convertfrompemprivatekey (Privatekey);            RSACryptoServiceProvider RSA = new RSACryptoServiceProvider (); Rsa.            ImportParameters (para); Byte[] TestdatA = Encoding.UTF8.GetBytes ("Hello");            MD5CryptoServiceProvider MD5 = new MD5CryptoServiceProvider (); byte[] SignData = RSA.            SignData (TestData, MD5);            Verify RSAParameters parapub = Pemconverter.convertfrompempublickey (PublicKey);            RSACryptoServiceProvider rsapub = new RSACryptoServiceProvider ();            Rsapub.importparameters (parapub);            if (Rsapub.verifydata (TestData, MD5, SignData)) {Console.WriteLine ("OK");            } else {Console.WriteLine ("No"); }        }    }}

　　

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. NET PEM key file generated using OpenSSL [1024 bits]