PHP ActiveX Requires Chilkat v11.0.0+

RSA Encrypt RSA/ECB/OAEPWithSHA1AndMGF1Padding

See more RSA Examples

Demonstrates how to RSA encrypt using RSA/ECB/OAEPWithSHA1AndMGF1Padding. Also demonstrates RSA/ECB/OAEPWithSHA-256AndMGF1Padding. Both of these terms are from Java's JCE. Note: In this context, "ECB" doesn't actually mean anything. It's a symmetric cipher mode that doesn't apply (or make sense) in this context. PHP ActiveX

<?php

$success = 0;

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

$rsa = new COM("Chilkat.Rsa");

//  First load a public key object with a public key.
//  In this case, we'll load it from a file.
$pubkey = new COM("Chilkat.PublicKey");
$success = $pubkey->LoadFromFile('qa_data/pem/rsa_public.pem');
if ($success == 0) {
    print $pubkey->LastErrorText . "\n";
    exit;
}

//  RSA encryption is limited to small amounts of data. The limit
//  is typically a few hundred bytes and is based on the key size and
//  padding (OAEP vs. PKCS1_5).  RSA encryption is typically used for
//  encrypting hashes or symmetric (bulk encryption algorithm) secret keys.
$plainText = 'Time is an illusion. Lunchtime doubly so.';

//  Import the public key to be used for encrypting.
$success = $rsa->UsePublicKey($pubkey);

//  To get OAEP padding, set the PkcsPadding property equal to 0
$rsa->PkcsPadding = 0;
$rsa->OaepHash = 'sha256';

//  Indicate we'll want hex output
$rsa->EncodingMode = 'hex';

//  Encrypt..
$usePrivateKey = 0;
$encryptedStr = $rsa->encryptStringENC($plainText,$usePrivateKey);
print $encryptedStr . "\n";

//  -------------------------------------------------
//  Now decrypt with the matching private key.
$rsa2 = new COM("Chilkat.Rsa");

$privKey = new COM("Chilkat.PrivateKey");
$success = $privKey->LoadEncryptedPem('qa_data/pem/rsa_passwd.pem','passwd');
if ($success == 0) {
    print $privKey->LastErrorText . "\n";
    exit;
}

$success = $rsa2->UsePrivateKey($privKey);

//  Make sure we have the same settings used for encryption.
$rsa2->PkcsPadding = 0;
$rsa2->EncodingMode = 'hex';
$rsa2->OaepHash = 'sha256';

$originalStr = $rsa2->decryptStringENC($encryptedStr,1);

print $originalStr . "\n";

?>