| code as follows |
|
|
<?php
/**
* Verify signature
&NBSP
* tobeverified the redaction to be verified,
* PlainText the plaintext of the signature to be validated;
* CertFile signer's public key certificate & nbsp
&NBSP
* Return validation successfully returns True, and the failure returns false (the reason for the failure from the Lasterrmsg property)
*/
Function verifymsg ($ Tobeverified, $PlainText, $CertFile, $signature _alg=openssl_algo_sha1)
{
&NBSP;&NBSP;&NBSP
// $fp =fopen ($CertFile, "R")
if (! $fp)
{
//echo " Error number:-10005, error description:er_find_cert_failed (certificate not found) "; &NBSP
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))
{
&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP
//print ("Www.111cn.net prompts you: Validation succeeded". "<br>");
return true;
}
Else
{
//echo Error number:-10021, Error Description:er_verify_error (verification failure) | ". Openssl_error_string ();
return false;
}&NBSP
}
? |
Openssl_verify may have three return value 1,0,-1, only 1 to indicate successful verification signatures.
$signature _alg default OPENSSL_ALGO_SHA1, if DSA encryption is set to Openssl_algo_dss1
