php verify,php 使用openssl_verify验证签名实例程序

/**

* 验证签名

* TobeVerified 待验证签名的密文

* PlainText 待验证签名的明文

* CertFile 签名者公钥证书

* return 验证成功返回true，失败返回false(从LastErrMsg属性获取失败原因)

*/

function VerifyMsg($TobeVerified, $PlainText, $CertFile,$signature_alg=OPENSSL_ALGO_SHA1)

{

//用公钥验签

$fp=fopen($CertFile,"r");

if(!$fp)

{

//echo "Error Number:-10005, Error Description: ER_FIND_CERT_FAILED(找不到证书)";

return false;

}

$pub_key=fread($fp,8192);

fclose($fp);

$res = openssl_get_publickey($pub_key);

if (1==openssl_verify($PlainText,pack("H" . strlen($TobeVerified), $TobeVerified) , $res,$signature_alg))

{

//print("www.111cn.net提示您：验证成功"."
");

return true;

}

else

{

//echo "Error Number:-10021, Error Description: ER_VERIFY_ERROR(验签失败)|".openssl_error_string();

return false;

}

}

?>