Perl

Encrypt File using X.509 Certificate using AES in CBC Mode

See more Encryption Examples

Demonstrates how to encrypt a file using an X.509 Certificate's public key, where the underlying bulk encryption algorithm is 128-bit AES in CBC mode. (The underlying bulk encryption algorithm can be specified to be other algorithms/strengths.) 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 public-key cryptography for encryption.
$crypt->put_CryptAlgorithm("pki");

# Get an X.509 certificate to use for encrypting.
# Note: Chilkat provides many different ways of loading a certificate, from many different formats,
# or if on Windows, from the installed certificates on the system.
# This example simply loads a certificate from a file.
# Also, for encryption, only the public key is needed.  Digital certificates embed the public key
# within the X.509 format itself.  Therefore, if you have a certificate, you also have the public key.
$cert = chilkat::CkCert->new();
$success = $cert->LoadFromFile("qa_data/certs/testCert.cer");
if ($success != 1) {
    print $cert->lastErrorText() . "\r\n";
    exit;
}

$success = $crypt->SetEncryptCert($cert);
if ($success != 1) {
    print $crypt->lastErrorText() . "\r\n";
    exit;
}

# Indicate the underlying bulk encryption algorithm to be used:
$crypt->put_Pkcs7CryptAlg("aes");
$crypt->put_KeyLength(128);

# Note: When doing public-key encryption the underlying bulk symmetric cipher mode will always be CBC. (at least with Chilkat...)

# There's one last option that could be set.  If is the RSA encryption encryption/padding scheme. 
# By default, RSAES_PKCS1-V1_5 is used.  If desired, the OaepPadding property could be set to 1 to
# use RSAES_OAEP.  (We'll leave it set at the default value of 0)
$crypt->put_OaepPadding(0);

# Everything is specified.  Now just encrypt...
# The output is PKCS7 in binary DER format.
$success = $crypt->CkEncryptFile("qa_data/hamlet.xml","qa_output/hamlet.p7");
if ($success != 1) {
    print $crypt->lastErrorText() . "\r\n";
    exit;
}

print "Finished." . "\r\n";