|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
namespace SimpleSAML\Module\webauthn\WebAuthn; |
|
4
|
|
|
|
|
5
|
|
|
use Cose\Key\Ec2Key; |
|
6
|
|
|
use Cose\Key\RsaKey; |
|
7
|
|
|
|
|
8
|
|
|
/** |
|
9
|
|
|
* FIDO2/WebAuthn Authentication Processing filter |
|
10
|
|
|
* |
|
11
|
|
|
* Filter for registering or authenticating with a FIDO2/WebAuthn token after |
|
12
|
|
|
* having authenticated with the primary authsource. |
|
13
|
|
|
* |
|
14
|
|
|
* @package SimpleSAMLphp |
|
15
|
|
|
*/ |
|
16
|
|
|
class WebAuthnAuthenticationEvent extends WebAuthnAbstractEvent |
|
17
|
|
|
{ |
|
18
|
|
|
/** |
|
19
|
|
|
* Initialize the event object. |
|
20
|
|
|
* |
|
21
|
|
|
* Validates and parses the configuration. |
|
22
|
|
|
* |
|
23
|
|
|
* @param string $pubkeyCredType PublicKeyCredential.type |
|
24
|
|
|
* @param string $scope the scope of the event |
|
25
|
|
|
* @param string $challenge the challenge which was used to trigger this event |
|
26
|
|
|
* @param string $idpEntityId the entity ID of our IdP |
|
27
|
|
|
* @param string $authData the authData binary string |
|
28
|
|
|
* @param string $clientDataJSON the client data JSON string which is present in all types of events |
|
29
|
|
|
* @param string $credentialId the credential ID |
|
30
|
|
|
* @param string $publicKey the public key which is supposed to validate the sig |
|
31
|
|
|
* (COSE format, still needs to be converted to PEM!) |
|
32
|
|
|
* @param string $signature the signature value to verify |
|
33
|
|
|
* @param bool $debugMode print debugging statements? |
|
34
|
|
|
*/ |
|
35
|
|
|
public function __construct( |
|
36
|
|
|
string $pubkeyCredType, |
|
37
|
|
|
string $scope, |
|
38
|
|
|
string $challenge, |
|
39
|
|
|
string $idpEntityId, |
|
40
|
|
|
string $authData, |
|
41
|
|
|
string $clientDataJSON, |
|
42
|
|
|
string $credentialId, |
|
43
|
|
|
string $publicKey, |
|
44
|
|
|
string $signature, |
|
45
|
|
|
bool $debugMode = false |
|
46
|
|
|
) { |
|
47
|
|
|
$this->eventType = "AUTH"; |
|
48
|
|
|
$this->credential = $publicKey; |
|
49
|
|
|
$this->credentialId = $credentialId; |
|
50
|
|
|
parent::__construct($pubkeyCredType, $scope, $challenge, $idpEntityId, $authData, $clientDataJSON, $debugMode); |
|
51
|
|
|
$this->validateSignature($authData . $this->clientDataHash, $signature); |
|
52
|
|
|
} |
|
53
|
|
|
|
|
54
|
|
|
|
|
55
|
|
|
/** |
|
56
|
|
|
* @param string $sigData |
|
57
|
|
|
* @param string $signature |
|
58
|
|
|
*/ |
|
59
|
|
|
private function validateSignature(string $sigData, string $signature): void |
|
60
|
|
|
{ |
|
61
|
|
|
$keyArray = $this->cborDecode(hex2bin($this->credential)); |
|
62
|
|
|
$keyObject = NULL; |
|
63
|
|
|
try { |
|
64
|
|
|
$keyObject = new Ec2Key($keyArray); |
|
65
|
|
|
} catch \Exception $e; |
|
|
|
|
|
|
66
|
|
|
if (!is_object($keyObject)) { |
|
67
|
|
|
try { |
|
68
|
|
|
$keyObject = new RsaKey($keyArray); |
|
69
|
|
|
} catch \Exception $e; |
|
70
|
|
|
} |
|
71
|
|
|
if (!is_object($keyObject)) { |
|
72
|
|
|
throw new Exception("Unable to make something out of the incoming 'public key'!"); |
|
73
|
|
|
} |
|
74
|
|
|
$keyResource = openssl_pkey_get_public($keyObject->asPEM()); |
|
75
|
|
|
if ($keyResource === false) { |
|
76
|
|
|
$this->fail("Unable to construct public key resource from PEM."); |
|
77
|
|
|
} |
|
78
|
|
|
/** |
|
79
|
|
|
* §7.2 STEP 17: validate signature |
|
80
|
|
|
*/ |
|
81
|
|
|
$sigcheck = openssl_verify($sigData, $signature, $keyResource, OPENSSL_ALGO_SHA256); |
|
82
|
|
|
switch ($sigcheck) { |
|
83
|
|
|
case 1: |
|
84
|
|
|
$this->pass("Signature validation succeeded!"); |
|
85
|
|
|
break; |
|
86
|
|
|
case 0: |
|
87
|
|
|
$this->fail("Signature validation failed (sigdata = $sigData) (signature = $signature) !"); |
|
88
|
|
|
break; |
|
89
|
|
|
default: |
|
90
|
|
|
$this->fail("There was an error executing the signature check."); |
|
91
|
|
|
break; |
|
92
|
|
|
} |
|
93
|
|
|
} |
|
94
|
|
|
} |
|
95
|
|
|
|
simplesamlphp /
simplesamlphp-module-webauthn
Loading history...