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Commit 946a4ac1 authored by Brion Vibber's avatar Brion Vibber

Add test cases for internal change in Salmon signing; fix for the new code.

Updated sig passes Tuomas's verifier, which is a good sign
parent e25c34a2
......@@ -80,6 +80,20 @@ class MagicEnvelope
throw new Exception(_m('Unable to locate signer public key.'));
}
/**
* The current MagicEnvelope spec as used in StatusNet 0.9.7 and later
* includes both the original data and some signing metadata fields as
* the input plaintext for the signature hash.
*
* @param array $env
* @return string
*/
public function signingText($env) {
return implode('.', array($env['data'], // this field is pre-base64'd
Magicsig::base64_url_encode($env['data_type']),
Magicsig::base64_url_encode($env['encoding']),
Magicsig::base64_url_encode($env['alg'])));
}
/**
*
......@@ -93,14 +107,17 @@ class MagicEnvelope
{
$signature_alg = Magicsig::fromString($keypair);
$armored_text = Magicsig::base64_url_encode($text);
return array(
$env = array(
'data' => $armored_text,
'encoding' => MagicEnvelope::ENCODING,
'data_type' => $mimetype,
'sig' => $signature_alg->sign($armored_text),
'sig' => '',
'alg' => $signature_alg->getName()
);
$env['sig'] = $signature_alg->sign($this->signingText($env));
return $env;
}
/**
......@@ -239,7 +256,7 @@ class MagicEnvelope
return false;
}
return $verifier->verify($env['data'], $env['sig']);
return $verifier->verify($this->signingText($env), $env['sig']);
}
/**
......@@ -290,3 +307,24 @@ class MagicEnvelope
);
}
}
/**
* Variant of MagicEnvelope using the earlier signature form listed in the MagicEnvelope
* spec in early 2010; this was used in StatusNet up through 0.9.6, so for backwards compatiblity
* we still need to accept and sometimes send this format.
*/
class MagicEnvelopeCompat extends MagicEnvelope {
/**
* StatusNet through 0.9.6 used an earlier version of the MagicEnvelope spec
* which used only the input data, without the additional fields, as the plaintext
* for signing.
*
* @param array $env
* @return string
*/
public function signingText($env) {
return $env['data'];
}
}
<?php
if (isset($_SERVER) && array_key_exists('REQUEST_METHOD', $_SERVER)) {
print "This script must be run from the command line\n";
exit();
}
define('INSTALLDIR', realpath(dirname(__FILE__) . '/../../..'));
define('STATUSNET', true);
require_once INSTALLDIR . '/lib/common.php';
class MagicEnvelopeTest extends PHPUnit_Framework_TestCase
{
/**
* Test that MagicEnvelope builds the correct plaintext for signing.
* @dataProvider provider
*/
public function testSignatureText($env, $expected)
{
$magic = new MagicEnvelope;
$text = $magic->signingText($env);
$this->assertEquals($expected, $text, "'$text' should be '$expected'");
}
static public function provider()
{
return array(
array(
// Sample case given in spec:
// http://salmon-protocol.googlecode.com/svn/trunk/draft-panzer-magicsig-00.html#signing
array(
'data' => 'Tm90IHJlYWxseSBBdG9t',
'data_type' => 'application/atom+xml',
'encoding' => 'base64url',
'alg' => 'RSA-SHA256'
),
'Tm90IHJlYWxseSBBdG9t.YXBwbGljYXRpb24vYXRvbSt4bWw=.YmFzZTY0dXJs.UlNBLVNIQTI1Ng=='
)
);
}
/**
* Test that MagicEnvelope builds the correct plaintext for signing.
* @dataProvider provider
*/
public function testSignatureTextCompat($env, $expected)
{
// Our old code didn't add the extra fields, just used the armored text.
$alt = $env['data'];
$magic = new MagicEnvelopeCompat;
$text = $magic->signingText($env);
$this->assertEquals($alt, $text, "'$text' should be '$alt'");
}
}
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