(Perl) Encrypt with Chilkat, Decrypt with OpenSSL

Demonstrates how to RSA encrypt a string using Chilkat, and then shows the corresponding OpenSSL command to RSA decrypt. The OpenSSL command to decrypt is as follows:

openssl rsautl -decrypt -inkey VP_Private.pem -in rsa_encrypted.bin -out original.txt

Chilkat Perl Downloads Perl Module for Windows, MacOS, Linux, Alpine Linux, Solaris

use chilkat();

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

$rsa = chilkat::CkRsa->new();

# Note: RSA encryption uses the public key.  
# RSA decryption uses the private key.
# The reason is that the public key can be freely provided to anybody.  This allows anybody
# to send an encrypted message to the private key owner, and only the private key owner 
# can decrypt.
$key = chilkat::CkPublicKey->new();

# Load an RSA public key from a PEM file:
$success = $key->LoadFromFile("qa_data/pem/VP_Public.pem");
if ($success != 1) {
    print $key->lastErrorText() . "\r\n";
    exit;
}

# Load the public key into the RSA object.
$success = $rsa->ImportPublicKeyObj($key);
if ($success != 1) {
    print $rsa->lastErrorText() . "\r\n";
    exit;
}

$strToEncrypt = "00000000;XYZ2-3BHQ-ABCD-MMVV;6MY1-GHJK-9LRR;0";

# The LittleEndian property is 0 by default, but it is set here
# anyway to show that LittleEndian byte ordering is required for OpenSSL compatibility.
$rsa->put_LittleEndian(0);

$usePrivateKey = 0;
$encryptedBytes = chilkat::CkByteData->new();
$success = $rsa->EncryptString($strToEncrypt,$usePrivateKey,$encryptedBytes);
if ($rsa->get_LastMethodSuccess() != 1) {
    print $rsa->lastErrorText() . "\r\n";
    exit;
}

# The OpenSSL command to decrypt would be this:
# openssl rsautl -decrypt -inkey VP_Private.pem -in rsa_encrypted.bin -out original.txt

$fac = chilkat::CkFileAccess->new();
$success = $fac->WriteEntireFile("qa_output/rsa_encrypted.bin",$encryptedBytes);
if ($success != 1) {
    print $fac->lastErrorText() . "\r\n";
    exit;
}

print "RSA Encryption Succeeded." . "\r\n";