C # Implementing Md5withrsa signatures

This is a long time ago wrote a blog, today, he found out to tidy up a blog to publish to the garden

At that time, when the docking union UnionPay did not get out, and then a chance to find a similar code reference for a while finally finished

This code is mainly to achieve the C # service side docking the mobile phone UnionPay Java side of the interface signature

I hope we can help you.

1 usingSystem;2 usingSystem.Collections.Generic;3 usingSystem.Linq;4 usingSystem.Text;5 usingSystem.Security.Cryptography.X509Certificates;6 usingSystem.Security.Cryptography;7 8 namespacemd5withrsatest9 {Ten      Public classMd5withrsa One     { A         Private Static Char[] Bcdlookup = {'0','1','2','3','4','5','6','7','8','9','a','b','C','D','e','F' }; -  -         /// <summary> the         ///returns the signature string for Md5withrsa -         /// </summary> -         /// <param name= "FileName" >path to the PFX certificate file</param> -         /// <param name= "password" >PFX certificate Password</param> +         /// <param name= "Strdata" >string to be signed</param> -         /// <param name= "encoding" >Character Set, default = Iso-8859-1</param> +         /// <returns>returns the signature string for Md5withrsa</returns> A          Public Static stringSignData (stringFileName,stringPasswordstringStrdata,stringencoding ="iso-8859-1") at         { - X509Certificate2 objx5092; -             if(string. Isnullorwhitespace (password)) -             { -objx5092 =NewX509Certificate2 (fileName); -}Else in             { -objx5092 =Newx509certificate2 (fileName, password); to             } +RSACryptoServiceProvider RSA = objx5092. Privatekey asRSACryptoServiceProvider; -             byte[] data =encoding.getencoding (Encoding). GetBytes (strdata); the             byte[] HashValue = RSA. SignData (data,"MD5");//using Md5withrsa signing for certificates *             returnBytestohexstr (HashValue);///Convert Signature results to 16 binary strings $         }Panax Notoginseng         /// <summary> -         ///Convert Signature results to 16 binary strings the         /// </summary> +         /// <param name= "BCD" >the byte number of the signature result</param> A         /// <returns>16 binary string</returns> the         Private Static stringBYTESTOHEXSTR (byte[] BCD) +         { -StringBuilder s =NewStringBuilder (BCD. Length *2); $              for(inti =0; I < BCD. Length; i++) $             { -S.append (bcdlookup[(bcd[i) >>4) &0x0f]); -S.append (bcdlookup[bcd[i) &0x0f]); the             } -             returns.tostring ();Wuyi         } the     } -}

C # Implementing Md5withrsa signatures