Encryption [modified]

[alexfromto]

Hi. Does anyone has some experience with Encryption? I need to encrypt password user submits and store it in the database. And of course I need to decrypt it back and compare to user password when user signs in. I created a test page and use System.Security.Cryptography.RijndaelManaged. On that page I encrypted string (passwrod) but not sure what to do next. I get Byte() back. How do I store it in the database? But most important how do I decrypt it back? When running encrypt and decrypt on the same page one after another and useing the same key it works with not problem. But if use decrypt separetely it throws me error. Here's the error I get: PKCS7 padding is invalid and cannot be removed. My guess it has something to do with Key and/or IV. Does that mean I need to save Key as well? I'm lost. Please help. Thanks, -- modified at 9:27 Thursday 23rd November, 2006

[Britney S Morales]

I got another solution You must to create a new class sheet (name.CS) Add these libraries using System.Security.Cryptography; using System.Text; using System.IO; using System.Xml; I made these functions based in a codeproject encrypt solution public string EncryptProcess(string password) { string passwordEncryted = Encrypt(password, "&%#@?,:*"); return (passwordEncryted); } private static String Encrypt(String strText, String strEncrKey) { byte[] bKey = new byte[8]; byte[] IV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF }; try { bKey = System.Text.Encoding.UTF8.GetBytes(strEncrKey.Substring(0, 8)); DESCryptoServiceProvider des = new DESCryptoServiceProvider(); Byte[] inputByteArray = Encoding.UTF8.GetBytes(strText); MemoryStream ms = new MemoryStream(); CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(bKey, IV), CryptoStreamMode.Write); cs.Write(inputByteArray, 0, inputByteArray.Length); cs.FlushFinalBlock(); return Convert.ToBase64String(ms.ToArray()); } catch (Exception ex) { return ex.Message; } } You must to invoice the first process Ex: string pass = EncryptProcess("SGC"); //Uppercase the answer is the string "2zhZqCYvfJc=" This is the Encrypt process, write me if works for you.. And i will write the Decrypt process ;P

keep Learning and you never will be out of date...

[alexfromto]

Thanks a lot. I will try. I do believe I've seen something similar online. Do you had any experience with System.Security.Cryptography.RijndaelManaged? Thank you.

[Britney S Morales]

X| nop

keep Learning and you never will be out of date...

[alexfromto]

Thanks anyway. I found some answeres and will try to create different ways of doing it.