(PHP ActiveX) Duplicate openssl dgst -md5 -sign myKey.pem something.txt | openssl enc -base64 -A

Demonstrates how to duplicate the creation of an RSA signature produced by this OpenSSL command:

openssl dgst -md5 -sign myKey.pem something.txt | openssl enc -base64 -A

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows Note: The php_com_dotnet.dll may need to be enabled inside of php.ini.

<?php

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

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.PrivateKey')
$pkey = new COM("Chilkat.PrivateKey");

// Load the private key from an RSA PEM file:
$success = $pkey->LoadPemFile('myKey.pem');

// Get the private key in XML format:
$pkeyXml = $pkey->getXml();

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Rsa')
$rsa = new COM("Chilkat.Rsa");

// Import the private key into the RSA component:
$success = $rsa->ImportPrivateKey($pkeyXml);
if ($success != 1) {
    print $rsa->LastErrorText . "\n";
    exit;
}

// OpenSSL uses BigEndian byte ordering:
$rsa->LittleEndian = 0;

// The resulting signature will be a Base64 string:
$rsa->EncodingMode = 'base64';

// For simplicity, we're not loading
// the data to be signed from a file.  We are instead simply
// using a literal string value.  
$strData = 'This is the text to be signed.';

// Hash the input using MD5, and then sign the hash:
// Other valid hash algorithm choices are "md2" and "sha-1".
$base64Sig = $rsa->signStringENC($strData,'md5');

print $base64Sig . "\n";

print 'Success!' . "\n";

?>