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MD5:
byte[] data = new byte[DATA_SIZE];
// This is one implementation of the abstract class MD5. MD5 md5 = new MD5CryptoServiceProvider(); byte[] result = md5.ComputeHash(data); SHA1:
byte[] data = new byte[DATA_SIZE];
byte[] result; SHA1 sha = new SHA1CryptoServiceProvider(); // This is one implementation of the abstract class SHA1. result = sha.ComputeHash(data); 可逆加密算法: DES:
private static void EncryptData(String inName, String outName, byte[] desKey, byte[] desIV)
{ //Create the file streams to handle the input and output files. FileStream fin = new FileStream(inName, FileMode.Open, FileAccess.Read); FileStream fout = new FileStream(outName, FileMode.OpenOrCreate, FileAccess.Write); fout.SetLength(0); //Create variables to help with read and write. byte[] bin = new byte[100]; //This is intermediate storage for the encryption. long rdlen = 0; //This is the total number of bytes written. long totlen = fin.Length; //This is the total length of the input file. int len; //This is the number of bytes to be written at a time. DES des = new DESCryptoServiceProvider(); CryptoStream encStream = new CryptoStream(fout, des.CreateEncryptor(desKey, desIV), CryptoStreamMode.Write); Console.WriteLine("Encrypting"); //Read from the input file, then encrypt and write to the output file. while(rdlen < totlen) { len = fin.Read(bin, 0, 100); encStream.Write(bin, 0, len); rdlen = rdlen + len; Console.WriteLine("{0} bytes processed", rdlen); } encStream.Close(); fout.Close(); fin.Close(); } 汇总一下,以便查阅。 |
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