Calculate MD5 Hash of File (or SHA-1, and other hash algorithms)

Demonstrates how to calculate a hash for a file's contents.

Download: Chilkat .NET Assemblies

Chilkat.Crypt2 crypt = new Chilkat.Crypt2();

bool success;
success = crypt.UnlockComponent("Anything for 30-day trial");
if (success != true) {
    textBox1.Text += crypt.LastErrorText + "\r\n";
    return;
}

//  Set the name of the hash algorithm.
//  Other choices include "sha1", "sha384", "sha512", "md2", "md5", and "haval".
crypt.HashAlgorithm = "md5";

//  EncodingMode specifies the encoding of the hash output.
//  It may be "hex", "url", "base64", or "quoted-printable".
crypt.EncodingMode = "hex";

//  Files of any type may be hashed -- it doesn't matter
//  if the file is binary or text...
string hashStr;
hashStr = crypt.HashFileENC("/temp/something.dat");
if (hashStr == null ) {
    textBox1.Text += crypt.LastErrorText + "\r\n";
    return;
}

textBox1.Text += hashStr + "\r\n";