关于php:PHPRSA加密解密

<?php/*** App RSA 加密解密辅助函数**/function app_pri_encrypt($data){    $privateKey = openssl_pkey_get_private(file_get_contents("app-private.key"));    $encrypted = null;    openssl_private_encrypt($data,$encrypted,$privateKey);    return base64_encode($encrypted);}function app_pri_decrypt($data){    $privateKey = openssl_pkey_get_private(file_get_contents("app-private.key"));    $decrypted = null;    openssl_private_decrypt(base64_decode($data),$decrypted,$privateKey);    return $decrypted;}function app_pub_encrypt($data){    $publicKey = openssl_pkey_get_public(file_get_contents("app-public.key"));    $encrypted = null;    openssl_public_encrypt($data,$encrypted,$publicKey);    return base64_encode($encrypted);}function app_pub_decrypt($data){    $publicKey = openssl_pkey_get_public(file_get_contents("app-public.key"));    $decrypted = null;    openssl_public_decrypt(base64_decode($data),$decrypted,$publicKey);    return $decrypted;}