(Ruby) Compute Glacier SHA256 Tree Hash of a File

Computes the Amazon Glacier SHA256 tree hash for a file.

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

Chilkat Ruby Downloads install from rubygems.org gem install chilkat or download... Ruby Library for Windows, MacOS, Linux, Alpine Linux

require 'chilkat'

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

crypt = Chilkat::CkCrypt2.new()

# 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.put_HashAlgorithm("sha256-tree-hash")

# Return the hash in lowercase hexidecimal format.
crypt.put_EncodingMode("hexlower")

treeHashHex = crypt.hashFileENC("qa_data/jpg/penguins.jpg")
print "SHA256 tree hash = " + treeHashHex + "\n";