Node.js

Hash Binary Data (SHA256 and other hash algorithms)

Demonstrates how to hash binary bytes using SHA256, SHA384, SHA512, MD2, MD5, HAVAL, RIPEMD, etc. Node.js

NODEJS_PRELUDE

function chilkatExample() {

    var success = false;

    //  This example requires the Chilkat API to have been previously unlocked.
    //  See Global Unlock Sample for sample code.

    //  Let's load a binary file to get the bytes..
    var jpgData = new chilkat.BinData();
    success = jpgData.LoadFile("qa_data/jpg/starfish.jpg");
    if (success !== true) {
        console.log("Failed to load file.");
        return;
    }

    jpgBytes = jpgData.GetBinary();

    var crypt = new chilkat.Crypt2();

    //  Choose the hash algorithm.
    //  Can be  "sha1", "sha256", "sha384", "sha512", "md2", "md5", "haval", "ripemd128", "ripemd160","ripemd256", or "ripemd320".
    crypt.HashAlgorithm = "sha256";

    hashBytes = crypt.HashBytes(jpgBytes);

    //  Let's examine the hash as a hex string.
    var sb = new chilkat.StringBuilder();
    sb.AppendEncoded(hashBytes,"hex");
    console.log("SHA256 hash = " + sb.GetAsString());

    //  We could alternatively hash the bytes and receive the hex result directly:
    crypt.EncodingMode = "hex";
    var hashHexStr = crypt.HashBytesENC(jpgBytes);
    console.log("SHA256 hash = " + hashHexStr);

}

chilkatExample();