Hi I'm writing an android app that needs crypto. On Android I generate a RSA key pair using the following code;
KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA");
SecureRandom r=SecureRandom.getInstance("SHA1PRNG");
kpg.initialize(2048,r);
KeyPair kp = kpg.generateKeyPair();
Utils.File.write(szPri,kp.getPrivate().getEncoded());
Utils.File.write(szPub,kp.getPublic().getEncoded());
My Utils.File creates two binary files one with the private key the other the public. I transfere the two files to my development PC for testing and basically want to use PHP to encrypt a small mesage so wrothe the following PHP code;
<?php
$dev="Emulator_96d68aa8156345d0";
$sz="Duncan var Her";
echo "Test Client generated key's
";
echo $dev."
";
$cpublic_der = file_get_contents($dev."/public");
$cprivate_der = file_get_contents($dev."/private");
$cpublic_pem = der2pem($cpublic_der);
echo $cpublic_pem."
";
if(openssl_public_encrypt($sz,$encsz,$cpublic_pem) == true) {
echo $sz."
";
echo "ok\N";
}
function der2pem($der_data) {
$pem = chunk_split(base64_encode($der_data), 64, "
");
$pem = "-----BEGIN CERTIFICATE-----
".$pem."-----END CERTIFICATE-----
";
return $pem;
}
?>
Message from php PHP Warning: openssl_public_encrypt(): key parameter is not a valid public key
What am I doing wrong?
Duncan
