Encryption/Decryption file, string etc using C# Code: using System; using System.Collections.Generic; using System.Text; using System.Security.Cryptography; using System.IO; namespace BHI.Rats { /// <summary> /// RatsEncryptionManager is responsible for encrypting and decrypting the files. /// </summary> public static class RatsEncryptionManager { private const string passKey = "c0ntr0l1"; /// <summary> /// Decrypts the input file (strInputFileName) and creates a new decrypted file (strOutputFileName) /// </summary> /// <param name="strInputFileName">input file name</param> /// <param name="strOutputFileName">output file name</param> public static void DecryptFiletoFile(string strInputFileName, string strOutputFileName) { string strFileData = ""; using (FileStream inputStream = new FileStream(strInputFileName, FileMode.Open, FileAccess.Read)) { DESCryptoServiceProvider cryptic = new DESCryptoServiceProvider(); cryptic.Key = ASCIIEncoding.ASCII.GetBytes(passKey); cryptic.IV = ASCIIEncoding.ASCII.GetBytes(passKey); CryptoStream crStream = new CryptoStream(inputStream, cryptic.CreateDecryptor(), CryptoStreamMode.Read); StreamReader reader = new StreamReader(crStream); strFileData = reader.ReadToEnd(); reader.Close(); inputStream.Close(); } if (File.Exists(strOutputFileName)) { File.Delete(strOutputFileName); } using (StreamWriter outputStream = new StreamWriter(strOutputFileName)) { outputStream.Write(strFileData, 0, strFileData.Length); outputStream.Close(); } } /// <summary> /// Encrypts the input file(strInputFileName) and creates a new encrypted file(strOutputFileName) /// </summary> /// <param name="strInputFileName">input file name</param> /// <param name="strOutputFileName">output file name</param> public static void EncryptFiletoFile(string strInputFileName, string strOutputFileName) { byte[] fileBuffer; using (FileStream inputStream = new FileStream(strInputFileName, FileMode.Open, FileAccess.Read)) { fileBuffer = new byte[inputStream.Length]; inputStream.Read(fileBuffer, 0, fileBuffer.GetLength(0)); inputStream.Close(); } if (File.Exists(strOutputFileName)) { File.Delete(strOutputFileName); } using (FileStream outputStream = new FileStream(strOutputFileName, FileMode.OpenOrCreate, FileAccess.ReadWrite)) { DESCryptoServiceProvider cryptic = new DESCryptoServiceProvider(); cryptic.Key = ASCIIEncoding.ASCII.GetBytes(passKey); cryptic.IV = ASCIIEncoding.ASCII.GetBytes(passKey); CryptoStream crStream = new CryptoStream(outputStream, cryptic.CreateEncryptor(), CryptoStreamMode.Write); crStream.Write(fileBuffer, 0, fileBuffer.Length); crStream.Close(); } } /// <summary> /// Encrypts the input string and creates a new encrypted file(strOutputFileName) /// </summary> /// <param name="strInputString">input string name</param> /// <param name="strOutputFileName">output file name</param> public static void EncryptStringtoFile(string strInputString, string strOutputFileName) { if (File.Exists(strOutputFileName)) { File.Delete(strOutputFileName); } using (FileStream outputStream = new FileStream(strOutputFileName, FileMode.OpenOrCreate, FileAccess.ReadWrite)) { DESCryptoServiceProvider cryptic = new DESCryptoServiceProvider(); cryptic.Key = ASCIIEncoding.ASCII.GetBytes(passKey); cryptic.IV = ASCIIEncoding.ASCII.GetBytes(passKey); CryptoStream crStream = new CryptoStream(outputStream, cryptic.CreateEncryptor(), CryptoStreamMode.Write); byte[] buffer = ASCIIEncoding.ASCII.GetBytes(strInputString); crStream.Write(buffer, 0, buffer.Length); crStream.Close(); } } /// <summary> /// Decrypts the input file (strInputFileName) and creates a new decrypted file (strOutputFileName) /// </summary> /// <param name="strInputFileName">input file name</param> public static string DecryptFiletoString(string strInputFileName) { string strFileData = ""; using (FileStream inputStream = new FileStream(strInputFileName, FileMode.Open, FileAccess.Read)) { DESCryptoServiceProvider cryptic = new DESCryptoServiceProvider(); cryptic.Key = ASCIIEncoding.ASCII.GetBytes(passKey); cryptic.IV = ASCIIEncoding.ASCII.GetBytes(passKey); CryptoStream crStream = new CryptoStream(inputStream, cryptic.CreateDecryptor(), CryptoStreamMode.Read); StreamReader reader = new StreamReader(crStream); strFileData = reader.ReadToEnd(); reader.Close(); inputStream.Close(); } return strFileData; } } }
Actually this is a solution to the given problem, I cud have write an article, but I don't know how can I, so posted it here Any idea hw can I start article here ?
Near the top of the page, you can see "My Go4Expert", "G4EF Links" etc... Click on "G4EF Links" and select "Articles and Tutorials". Then appropriate go to the sub-forum under which the article should be posted (for this one, it's Programming -> C#). Then click on "Submit new article" near the top of the page. Write your article and hit post. AND, PLEASE POST YOUR CODE INSIDE CODE-BLOCKS. I did it for you in your first post in this thread.
Nomination for article of the month - Jun 2009 Started. Nominate this article for Article of the month - Jun 2009
Encryption and decryption is used in cryptography.The Mean of cryptography is secret writing.Encryption is used to encrypt(convert) the data or file in a secure or pseudo format by sender. Receiver receive it and decrypt it by using a key suggested by sender
Can anybody help me with this? I have a bunch of numbers separated with a space in a text box. I want to store them into an array?