(Perl) RSA Decrypt using PEM

This example demonstrates decryping RSA encrypted data that is base64 encoded. It uses a private key loaded from a PEM file.

Note: This example requires Chilkat v11.0.0 or greater.

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

use chilkat();

$success = 0;

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

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

$key = chilkat::CkPrivateKey->new();

# Load an RSA private key from an unencrypted PEM file:
# (To load from an encrypted PEM file, call LoadEncryptedPemFile instead.)

$success = $key->LoadPemFile("qa_data/rsa/decryptTest/priv.pem");
if ($success == 0) {
    print $key->lastErrorText() . "\r\n";
    exit;
}

# Make the key available to the RSA object
$success = $rsa->UsePrivateKey($key);
if ($success == 0) {
    print $rsa->lastErrorText() . "\r\n";
    exit;
}

$encryptedStr = "pP9XFJEsGgxPNHEgNiLB5H5ksCOXDk/G49BPTog1jKLAhYofV4UTH5k2TOYiqRnDnKs8+8uPoN/IxdiGXvuYG8HRzN0HtkhoZO/AxeyaB9S7eddCUlT0Pl2PEB2yQ9HG5rM7jqYOD6MAM4cuX7hqT8fa8tbzJzmBwdfFDBz94bwQjULHiO+gklIBC4vhkXT4yjuvEjxTAKU6tJeZYkBooJNdS/vE5RZRpuF6bGZU41Qc17qFR+iReBq+9f8IMmw8WR8fMbOCaygOfFS1nw7JVsIMGsAIXS8rUaJ/2DfGPfQx5HCiVtTOreGYRUI3esAQjnvUCnavZyQgs53nl7e2aA==";

$rsa->put_EncodingMode("base64");

$usePrivateKey = 1;
$decryptedStr = $rsa->decryptStringENC($encryptedStr,$usePrivateKey);

print "Decrypted:" . "\r\n";
print $decryptedStr . "\r\n";