Event-Federation/wordpress-activitypub
Event-Federation/wordpress-activitypub
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some refactorings and fixed the tests

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This commit is contained in:
Matthias Pfefferle 2023-06-01 09:49:40 +02:00
parent 173e3abfa7
commit 96881b940a
3 changed files with 39 additions and 74 deletions
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2
includes/class-http.php
View file

@ -34,7 +34,7 @@ class Http {
'headers' => array(
'Accept' => 'application/activity+json',
'Content-Type' => 'application/activity+json',
'Digest' => "SHA-256=$digest",
'Digest' => $digest,
'Signature' => $signature,
'Date' => $date,
),

15
includes/class-signature.php
View file

@ -131,8 +131,10 @@ class Signature {
$path .= '?' . $url_parts['query'];
}
$http_method = \strtolower( $http_method );
if ( ! empty( $digest ) ) {
$signed_string = "(request-target): $http_method $path\nhost: $host\ndate: $date\ndigest: SHA-256=$digest";
$signed_string = "(request-target): $http_method $path\nhost: $host\ndate: $date\ndigest: $digest";
} else {
$signed_string = "(request-target): $http_method $path\nhost: $host\ndate: $date";
}
@ -165,7 +167,7 @@ class Signature {
if ( is_object( $request ) ) { // REST Request object
$headers = $request->get_headers();
$actor = isset( json_decode( $request->get_body() )->actor ) ? json_decode( $request->get_body() )->actor : '';
$headers['(request-target)'][0] = strtolower( $request->get_method() ) . ' /' . rest_get_url_prefix() . $request->get_route();
$headers['(request-target)'][0] = strtolower( $request->get_method() ) . ' ' . $request->get_route();
} else {
$request = self::format_server_request( $request );
$headers = $request['headers']; // $_SERVER array
@ -227,7 +229,9 @@ class Signature {
if ( \is_wp_error( $public_key ) ) {
return $public_key;
}
$verified = \openssl_verify( $signed_data, $signature_block['signature'], $public_key, $algorithm ) > 0;
if ( ! $verified ) {
return new WP_Error( 'activitypub_signature', 'Invalid signature', array( 'status' => 403 ) );
}
@ -242,11 +246,6 @@ class Signature {
* @return string $publicKeyPem
*/
public static function get_remote_key( $key_id ) { // phpcs:ignore
$pre = apply_filters( 'pre_get_remote_key', false, $key_id );
if ( $pre ) {
return $pre;
}
$actor = \Activitypub\get_remote_metadata_by_actor( strtok( strip_fragment_from_url( $key_id ), '?' ) ); // phpcs:ignore
if ( \is_wp_error( $actor ) ) {
return $actor;
@ -374,7 +373,7 @@ class Signature {
public static function generate_digest( $body ) {
$digest = \base64_encode( \hash( 'sha256', $body, true ) ); // phpcs:ignore
return "$digest";
return "SHA-256=$digest";
}
/**

96
tests/test-class-activitypub-rest-post-signature-verification.php
View file

@ -1,41 +1,7 @@
<?php
class Test_Activitypub_Signature_Verification extends WP_UnitTestCase {
public $server;
public function setUp() : void {
parent::setUp();
/**
* Global $wp_rest_server variable
*
* @var WP_REST_Server $wp_rest_server Mock REST server.
*/
global $wp_rest_server;
add_filter( 'pre_get_remote_key', array( get_called_class(), 'pre_get_remote_key' ), 10, 2 );
$wp_rest_server = new \WP_REST_Server();
$this->server = $wp_rest_server;
do_action( 'rest_api_init' );
}
/**
* Tear down after test ends
*/
public function tearDown() : void {
remove_filter( 'pre_get_remote_key', array( get_called_class(), 'pre_get_remote_key' ) );
parent::tearDown();
global $wp_rest_server;
$wp_rest_server = null;
}
public function test_activity_signature() {
$pre_http_request = new MockAction();
add_filter( 'pre_http_request', array( $pre_http_request, 'filter' ), 10, 3 );
// Activity for generate_digest
$post = \wp_insert_post(
array(
@ -63,11 +29,11 @@ class Test_Activitypub_Signature_Verification extends WP_UnitTestCase {
$host = $url_parts['host'];
$headers = array(
'digest' => [ "SHA-256=$digest" ],
'signature' => [ $signature ],
'date' => [ $date ],
'host' => [ $host ],
'(request-target)' => [ 'POST ' . $route ]
'digest' => array( $digest ),
'signature' => array( $signature ),
'date' => array( $date ),
'host' => array( $host ),
'(request-target)' => array( 'post ' . $route ),
);
// Start verification
@ -75,21 +41,32 @@ class Test_Activitypub_Signature_Verification extends WP_UnitTestCase {
$signature_block = Activitypub\Signature::parse_signature_header( $headers['signature'] );
$signed_headers = $signature_block['headers'];
$signed_data = Activitypub\Signature::get_signed_data( $signed_headers, $signature_block, $headers );
$public_key = Activitypub\Signature::get_public_key( 1 );
// signature_verification
$verified = \openssl_verify( $signed_data, $signature_block['signature'], $public_key, 'rsa-sha256' ) > 0;
$this->assertTrue( $verified );
remove_filter( 'pre_http_request', array( $pre_http_request, 'filter' ), 10 );
}
public function test_rest_activity_signature() {
$pre_http_request = new MockAction();
// $pre_get_remote_key = new MockAction();
add_filter( 'pre_http_request', array( $pre_http_request, 'filter' ), 10, 3 );
add_filter( 'pre_get_remote_key', array( get_called_class(), 'pre_get_remote_key' ), 10, 2 );
add_filter(
'pre_get_remote_metadata_by_actor',
function( $json, $actor ) {
// return ActivityPub Profile with signature
return array(
'id' => $actor,
'type' => 'Person',
'publicKey' => array(
'id' => $actor . '#main-key',
'owner' => $actor,
'publicKeyPem' => \Activitypub\Signature::get_public_key( 1 ),
),
);
},
10,
2
);
// Activity Object
$post = \wp_insert_post(
@ -99,7 +76,7 @@ class Test_Activitypub_Signature_Verification extends WP_UnitTestCase {
)
);
$remote_actor = \get_author_posts_url( 2 );
$remote_actor_inbox = \get_rest_url( null, 'activitypub/1.0/inbox' );
$remote_actor_inbox = Activitypub\get_rest_url_by_path( '/inbox' );
$activitypub_post = new \Activitypub\Model\Post( $post );
$activitypub_activity = new Activitypub\Model\Activity( 'Create' );
$activitypub_activity->from_post( $activitypub_post );
@ -109,16 +86,16 @@ class Test_Activitypub_Signature_Verification extends WP_UnitTestCase {
// generate_digest & generate_signature
$digest = Activitypub\Signature::generate_digest( $activity );
$date = gmdate( 'D, d M Y H:i:s T' );
$signature = Activitypub\Signature::generate_signature( 1, 'POST', $remote_actor, $date, $digest );
$signature = Activitypub\Signature::generate_signature( 1, 'POST', $remote_actor_inbox, $date, $digest );
// Signed headers
$url_parts = wp_parse_url( $remote_actor );
$route = add_query_arg( $url_parts['query'], $url_parts['path'] );
$url_parts = wp_parse_url( $remote_actor_inbox );
$route = $url_parts['path'] . '?' . $url_parts['query'];
$host = $url_parts['host'];
$request = new WP_REST_Request( 'POST', ACTIVITYPUB_REST_NAMESPACE . '/inbox' );
$request = new WP_REST_Request( 'POST', $route );
$request->set_header( 'content-type', 'application/activity+json' );
$request->set_header( 'digest', "SHA-256=$digest" );
$request->set_header( 'digest', $digest );
$request->set_header( 'signature', $signature );
$request->set_header( 'date', $date );
$request->set_header( 'host', $host );
@ -126,19 +103,8 @@ class Test_Activitypub_Signature_Verification extends WP_UnitTestCase {
// Start verification
$verified = \Activitypub\Signature::verify_http_signature( $request );
// $this->assertTRUE( $verified );
$this->assertTrue( $verified );
remove_filter( 'pre_get_remote_key', array( get_called_class(), 'pre_get_remote_key' ) );
remove_filter( 'pre_http_request', array( $pre_http_request, 'filter' ), 10 );
remove_filter( 'pre_get_remote_metadata_by_actor', array( get_called_class(), 'pre_get_remote_key' ), 10, 2 );
}
public static function pre_get_remote_key( $pre, $key_id ) {
$query = wp_parse_url( $key_id, PHP_URL_QUERY );
parse_str( $query, $output );
if ( is_int( $output['author'] ) ) {
return ActivityPub\Signature::get_public_key( int( $output['author'] ) );
}
return $pre;
}
}