gnupg
If verification fails, the gnupg_verify() returns the key's id instead of fingerprint . It does not return FALSE as stated above (PHP4, have not tested PHP5). You can compare it with result of keyinfo:
<?php
$resultOfVerify = gnupg_verify($gpgresource, $message,FALSE,$key);
echo "<pre>\$resultOfVerify",print_r($resultOfVerify),"</pre>";
//Above will out put something like
?>
$resultOfVerify Array
(
[0] => Array
(
[fingerprint] => xxxxxxxxx (IF MESSAGE IS VERIFIED, THEN THIS MATCHES THE KEY FINGERPRINT OF THE KEY, IF UNVERIFIED, MATCHES THE KEY ID
[validity] => 0
[timestamp] => 0
[status] => NNNNNN
[summary] => 4
)
)
<?php
$keyinfo = gnupg_keyinfo($gpgresource,$key);
echo "<pre>\$keyinfo ",print_r($keyinfo),"</pre>";
//Above will out put something like
?>
$keyinfo Array
(
[0] => Array
(
[disabled] =>
[expired] =>
[revoked] =>
[is_secret] =>
[can_sign] => 1
[can_encrypt] => 1
[uids] => Array
(
[0] => Array
(
[name] => WHATEVER
[comment] =>
[email] =>
[uid] => WHATEVER
[revoked] =>
[invalid] =>
)
)
[subkeys] => Array
(
[0] => Array
(
[fingerprint] => xxxxxxxxxxxxxxxxxx
[keyid] => xxxxxxxxx
[timestamp] => xxxxxxxxx
[expires] => 0
[is_secret] =>
[invalid] =>
[can_encrypt] => 1
[can_sign] => 1
[disabled] =>
[expired] =>
[revoked] =>
)
)
)
<?php
//To test if a message/signature pair is verified
if($resultOfVerify[0]['fingerprint'] == $keyinfo[0]['subkeys'][0]['fingerprint']){
//Ok, verified
}else{
//Oops, NOT verified
}
?>
gnupg_verify
(PECL gnupg:0.1-1.3.1)
gnupg_verify — Verifies a signed text
Description
array gnupg_verify
( resource $identifier
, string $signed_text
, string $signature
[, string &$plaintext
] )
Verifies the given signed_text and returns information about the signature. To verify a clearsigned text, set signature to FALSE. If the optional parameter plaintext is passed, it is filled with the plaintext .
Return Values
On success, this function returns informations about the signature. On failure, this function returns FALSE.
Voorbeelden
Example#1 Procedural gnupg_verify() example
<?php
$plaintext = "";
$res = gnupg_init();
// clearsigned
$info = gnupg_verify($res,$signed_text,false,$plaintext);
print_r($info);
// detached signature
$info = gnupg_verify($res,$signed_text,$signature);
print_r($info);
?>
Example#2 OO gnupg_verify() example
<?php
$plaintext = "";
$gpg = new gnupg();
// clearsigned
$info = $gpg -> verify($signed_text,false,$plaintext);
print_r($info);
// detached signature
$info = $gpg -> verify($signed_text,$signature);
print_r($info);
?>
add a note
User Contributed Notesgnupg_verify
dd at hibm dot org
26-Feb-2009 02:48
26-Feb-2009 02:48
kae at verens dot com
19-Sep-2008 01:27
19-Sep-2008 01:27
You can see who made the signature by checking its fingerprint:
<?php
$res = gnupg_init();
$info = gnupg_verify($res,$signed_text,$signature);
if($info !== false){
$fingerprint = $info['fingerprint'];
var_dump(gnupg_keyinfo($res, $fingerprint));
}