(PHP Extension) RSA Signature SHA256withRSA, iso-8859-1, base64

See more RSA Examples

RSA sign the iso-8859-1 byte representation of a string with SHA256withRSA, and return the signature in the base64 encoding.

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<?php

// The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number.
// For example, if using Chilkat v9.5.0.48, then include as shown here:
include("chilkat_9_5_0.php");

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

// This example will duplicate the following Java code:
// 
// Signature sign = Signature.getInstance("SHA256withRSA");
// sign.initSign(privateKey);
// sign.update(original.getBytes(Charset.forName("ISO-8859-1")));
// 
// ...
// byte[] resultado = sign.sign();
// sello = encodeByteArrayToBase64(resultado);
// 

// Load an RSA private key for signing.
// You can load any format file.  This example loads a .pem, but you can provide path to any type of file holding a private key.
$privKey = new CkPrivateKey();
$success = $privKey->LoadAnyFormatFile('qa_data/pem/rsa_passwd.pem','passwd');
if ($success != true) {
    print $privKey->lastErrorText() . "\n";
    exit;
}

$rsa = new CkRsa();
$rsa->ImportPrivateKeyObj($privKey);

$originalData = 'This is the string to be hashed an RSA signed.';

// Indicate that we want the iso-8859-1 byte representation of the string to be signed
$rsa->put_Charset('iso-8859-1');

// We want the RSA signature in base64 format
$rsa->put_EncodingMode('base64');

$sigBase64 = $rsa->signStringENC($originalData,'sha256');
print $sigBase64 . "\n";

?>