Perl Requires Chilkat v11.1.0+

openssl enc decrypt

See more Encryption Examples

Demonstrates how to decrypt a file that was encrypted using "openssl enc".

This example shows how to decrypt what was created using this openssl command:

openssl enc -e -aes-256-cbc -in hamlet.xml -out hamlet.enc -pass file:./secret.txt

This example shows how to do this:

openssl enc -d -aes-256-cbc -in hamlet.enc -out hamlet_dec.xml -pass file:./secret.txt

Perl

use chilkat();

$success = 0;

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

$crypt = chilkat::CkCrypt2->new();

#  Use aes-256-cbc
$crypt->put_CryptAlgorithm("aes");
$crypt->put_CipherMode("cbc");
$crypt->put_KeyLength(256);

#  We'll need to set the hash algorithm to either MD5 or SHA256.
#  openssl version 1.0.* or earlier used MD5 by default
#  openssl version 1.1.* uses SHA-256 for the password to secret key derivation.

#  For example, if openssl 1.1.0 was used, we should do this:
$crypt->put_HashAlgorithm("sha256");

#  This example assumes openssl 1.0.2 was used to encrypt what we're now decrypting:
$crypt->put_HashAlgorithm("md5");

#  The openssl command we are duplicating is:
#  
#     openssl enc -d -aes-256-cbc -in hamlet.enc -out hamlet_dec.xml -pass file:./secret.txt
#  
#  The file secret.txt contains the word "secret".  We could write code to load the contents
#  of secret.txt, but instead we'll just do this:
$crypt->SetEncodedKey("secret","openssl");

#  Load the file to be decrypted.
$fileData = chilkat::CkBinData->new();
$success = $fileData->LoadFile("qa_data/openssl_enc/hamlet.enc");

#  Decrypt
$crypt->put_VerboseLogging(1);
$success = $crypt->DecryptBd($fileData);
print $crypt->lastErrorText() . "\r\n";

#  Save the decrypted output.
$success = $fileData->WriteFile("c:/temp/qa_output/hamlet_dec.xml");

print "success = " . $success . "\r\n";