(Ruby) Encrypt / Decrypt a File and Verify it has not Changed

Demonstrates how to encrypt and decrypt a file, and verify it has not changed.

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

require 'chilkat'

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

crypt = Chilkat::CkCrypt2.new()

crypt.put_CryptAlgorithm("aes")
crypt.put_CipherMode("cbc")
crypt.put_KeyLength(128)
crypt.put_PaddingScheme(0)

ivHex = "000102030405060708090A0B0C0D0E0F"
crypt.SetEncodedIV(ivHex,"hex")

keyHex = "00010203040506071011121314151617"
crypt.SetEncodedKey(keyHex,"hex")

dataFile = "qa_data/zips/HBIQ040615300005.ZIP"
outFile = "qa_output/HBIQ040615300005.enc"
outFile2 = "qa_output/HBIQ040615300005.ZIP"

success = crypt.CkEncryptFile(dataFile,outFile)
success = crypt.CkDecryptFile(outFile,outFile2)

fac = Chilkat::CkFileAccess.new()
bEqual = fac.FileContentsEqual(dataFile,outFile2)
if (bEqual != true)
    print "Decrypted file not equal to the original." + "\n";
else
    print "Success." + "\n";
end