<?php
 
//rsa和rsa2 PHP版签名生成以及验证类
//$content,$signature,$publicKey,$type,$content原文，$signature被验证的签名，$publicKey和$privateKey公私钥都是只有内容的一行字符串，$type为rsa，或者rsa2
class RSA{
    public static function sign($content,$privateKey,$type){
        if($type == "rsa"){
            openssl_sign($content,$signature,"-----BEGIN PRIVATE KEY-----\n".$privateKey."\n-----END PRIVATE KEY-----", OPENSSL_ALGO_SHA1);
        }elseif ($type == "rsa2") {
            openssl_sign($content,$signature,"-----BEGIN PRIVATE KEY-----\n".$privateKey."\n-----END PRIVATE KEY-----", OPENSSL_ALGO_SHA256);
        }else{
            throw new Exception("Only support OPENSSL_ALGO_SHA1 or OPENSSL_ALGO_SHA256 algorithm signature!");
        }
        return base64_encode($signature);
    }
 
    public static function verify($content,$signature,$publicKey,$type){
        if($type == "rsa"){
            return openssl_verify($content,base64_decode($signature),"-----BEGIN PUBLIC KEY-----\n".$publicKey."\n-----END PUBLIC KEY-----", OPENSSL_ALGO_SHA1);
        }elseif ($type == "rsa2") {
            return openssl_verify($content,base64_decode($signature),"-----BEGIN PUBLIC KEY-----\n".$publicKey."\n-----END PUBLIC KEY-----", OPENSSL_ALGO_SHA256);
        }else{
            throw new Exception("Only support OPENSSL_ALGO_SHA1 or OPENSSL_ALGO_SHA256 algorithm signature verify!");
        }
    }
}
?>