(Tcl) 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 Tcl Extension Downloads Chilkat Tcl Extension Downloads

load ./chilkat.dll

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

set crypt [new_CkCrypt2]

CkCrypt2_put_CryptAlgorithm $crypt "aes"
CkCrypt2_put_CipherMode $crypt "cbc"
CkCrypt2_put_KeyLength $crypt 128
CkCrypt2_put_PaddingScheme $crypt 0

set ivHex "000102030405060708090A0B0C0D0E0F"
CkCrypt2_SetEncodedIV $crypt $ivHex "hex"

set keyHex "00010203040506071011121314151617"
CkCrypt2_SetEncodedKey $crypt $keyHex "hex"

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

set success [CkCrypt2_CkEncryptFile $crypt $dataFile $outFile]
set success [CkCrypt2_CkDecryptFile $crypt $outFile $outFile2]

set fac [new_CkFileAccess]

set bEqual [CkFileAccess_FileContentsEqual $fac $dataFile $outFile2]
if {$bEqual != 1} then {
    puts "Decrypted file not equal to the original."
} else {
    puts "Success."
}


delete_CkCrypt2 $crypt
delete_CkFileAccess $fac