Node.js

Compute Glacier SHA256 Tree Hash of a File

See more Amazon Glacier Examples

Computes the Amazon Glacier SHA256 tree hash for a file.

Note: This example requires Chilkat v9.5.0.78 or greater.

Node.js

NODEJS_PRELUDE

function chilkatExample() {

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

    var crypt = new chilkat.Crypt2();

    // For more information about Amazon Glacier tree hashes, see Computing Glacier Checksums
    // Chilkat added the "sha256-tree-hash" algorithm in v9.5.0.78 to make it easy to compute the Glacier tree hash checksum
    // of a file or from bytes in memory.
    crypt.HashAlgorithm = "sha256-tree-hash";

    // Return the hash in lowercase hexidecimal format.
    crypt.EncodingMode = "hexlower";

    var treeHashHex = crypt.HashFileENC("qa_data/jpg/penguins.jpg");
    console.log("SHA256 tree hash = " + treeHashHex);

}

chilkatExample();