Lightweight RSA Encryption PHP -

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so need authenticate unique users, each user have own priv/pub keypair. i'm trying make lightweight class can generate key pair, , encrypt or decrypt data.

here have far:

class rsa {     public $pubkey = '';     public $privkey = '';      public function genkeys()     {         /* create private , public key */         $res = openssl_pkey_new();          /* extract private key $res $privkey */         openssl_pkey_export($res, $privkey);         $this->privkey = $privkey;          /* extract public key $res $pubkey */         $pubkey = openssl_pkey_get_details($res);         $pubkey = $pubkey["key"];          $this->pubkey = $pubkey;     }      public function encrypt($data)     {         $data = '';         if (openssl_private_encrypt($data, $encrypted, $this->privkey))             $data = base64_encode($encrypted);         return $data;     }      public function decrypt($data)     {         $data = '';         if (openssl_public_decrypt(base64_decode($data), $decrypted, $this->pubkey))             $data = $decrypted;         return $data;     } }

i'm encrypting data , decrypting , echoing plain text returns blank?

$rsa = new rsa(); $rsa->genkeys();  $text = "hello world.";  $e = $rsa->encrypt($text); $m = $rsa->decrypt($e);  echo "encrypted: $e <br />"; echo "decrypted: $m <br />";

any ideas? , don't want use heavy extensive libraries. lightweight possible perfect.

i removed base encoding , got work:

class rsa {     public $privkey = '';     public $pubkey = '';      public function genkeys()     {         $res = openssl_pkey_new();          // private key         openssl_pkey_export($res, $priv);         $this->privkey = $priv;          // public key         $pubkey = openssl_pkey_get_details($res);         $this->pubkey = $pubkey["key"];     }      public function private_encrypt( $tocrypt )     {         $output = "";         openssl_private_encrypt($tocrypt, $output, $this->privkey);         return $output;     }      public function public_decrypt( $tocrypt )     {         $output = "";         openssl_public_decrypt($tocrypt, $output, $this->pubkey);         return $output;     } }  $rsa = new rsa(); $rsa->genkeys();  $m = "hi";  $e = $rsa->private_encrypt( $m );  echo $rsa->public_decrypt( $e );

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