Perl Requires Chilkat v9.5.0.67+

RSAES-OAEP Encrypt String with AES-128 Content Encryption and SHA256

See more Encryption Examples

Encrypts a string using RSAES-OAEP with SHA256 and AES-128 content encryption to produce PKCS7 output (base64 encoded). Chilkat2 Perl

use strict;
use warnings;
use Chilkat2;

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

# First build a string to be encrypted
my $sb = Chilkat2::StringBuilder->new;
my $i = 1;
while ($i < 25) {
    $sb->AppendInt($i);
    $sb->Append(" the quick brown fox jumped over the lazy dog.\r\n");
    $i = $i + 1;
}

print $sb->GetAsString(), "\n";

# The string to be encrypted looks like this:

# 1 the quick brown fox jumped over the lazy dog.
# 2 the quick brown fox jumped over the lazy dog.
# 3 the quick brown fox jumped over the lazy dog.
# 4 the quick brown fox jumped over the lazy dog.
# 5 the quick brown fox jumped over the lazy dog.
# 6 the quick brown fox jumped over the lazy dog.
# ...

# Load a digital certificate.
# We don't need the private key for encryption.
# Only the public key is needed (which is included in a certificate).
my $cert = Chilkat2::Cert->new;
my $success = $cert->LoadFromFile('qa_data/rsaes-oaep/cert.pem');
if (!$success) {
    print $cert->LastErrorText, "\n";
    exit;
}

my $crypt = Chilkat2::Crypt2->new;

# Tell the crypt object to use the certificate.
$crypt->SetEncryptCert($cert);

# Indicate that we want PKI encryption (i.e. public-key infrastructure)
# to produce a CMS message (Cryptographic Message Syntax/PKCS7),
# that is be created with RSAES-OAEP padding, SHA256, and AES-128 for the
# bulk encryption.
$crypt->CryptAlgorithm('pki');
$crypt->Pkcs7CryptAlg('aes');
$crypt->KeyLength(128);
$crypt->OaepHash('sha256');
$crypt->OaepPadding(1);

# Also, don't forget to be specific about the character encoding (byte representation) of the
# string to be encrypted.
$crypt->Charset('utf-8');

# Now indicate that the PKCS7 output is to be returned in the base64 encoding.
$crypt->EncodingMode('base64');

my $base64Pkcs7 = $crypt->EncryptStringENC($sb->GetAsString());
if (!$crypt->LastMethodSuccess) {
    print $crypt->LastErrorText, "\n";
    exit;
}

# Show the output
print $base64Pkcs7, "\n";

# This base64 can be copy-and-pasted into the form at http://lapo.it/asn1js/
# to verify that all the chosen algorithms were indeed used.

print "OK.\n";