Event-Federation/wordpress-activitypub
Event-Federation/wordpress-activitypub
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use WP_Error

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This commit is contained in:
Matthias Pfefferle 2023-05-09 11:51:53 +02:00
parent 378f5dacdc
commit c42edfce68
1 changed files with 7 additions and 6 deletions
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13
includes/class-signature.php
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@ -1,6 +1,7 @@
<?php
namespace Activitypub;
use WP_Error;
use DateTime;
use DateTimeZone;
@ -142,7 +143,7 @@ class Signature {
}
if ( ! isset( $headers['signature'] ) ) {
return new \WP_Error( 'activitypub_signature', 'Request not signed', array( 'status' => 403 ) );
return new WP_Error( 'activitypub_signature', 'Request not signed', array( 'status' => 403 ) );
}
if ( array_key_exists( 'signature', $headers ) ) {
@ -152,7 +153,7 @@ class Signature {
}
if ( ! isset( $signature_block ) || ! $signature_block ) {
return new \WP_Error( 'activitypub_signature', 'Incompatible request signature. keyId and signature are required', array( 'status' => 403 ) );
return new WP_Error( 'activitypub_signature', 'Incompatible request signature. keyId and signature are required', array( 'status' => 403 ) );
}
$signed_headers = $signature_block['headers'];
@ -162,12 +163,12 @@ class Signature {
$signed_data = self::get_signed_data( $signed_headers, $signature_block, $headers );
if ( ! $signed_data ) {
return new \WP_Error( 'activitypub_signature', 'Signed request date outside acceptable time window', array( 'status' => 403 ) );
return new WP_Error( 'activitypub_signature', 'Signed request date outside acceptable time window', array( 'status' => 403 ) );
}
$algorithm = self::get_signature_algorithm( $signature_block );
if ( ! $algorithm ) {
return new \WP_Error( 'activitypub_signature', 'Unsupported signature algorithm (only rsa-sha256 and hs2019 are supported)', array( 'status' => 403 ) );
return new WP_Error( 'activitypub_signature', 'Unsupported signature algorithm (only rsa-sha256 and hs2019 are supported)', array( 'status' => 403 ) );
}
if ( \in_array( 'digest', $signed_headers, true ) && isset( $body ) ) {
@ -183,7 +184,7 @@ class Signature {
}
if ( \base64_encode( \hash( $hashalg, $body, true ) ) !== $digest[1] ) { // phpcs:ignore
return new \WP_Error( 'activitypub_signature', 'Invalid Digest header', array( 'status' => 403 ) );
return new WP_Error( 'activitypub_signature', 'Invalid Digest header', array( 'status' => 403 ) );
}
}
@ -193,7 +194,7 @@ class Signature {
}
$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 ) );
return new WP_Error( 'activitypub_signature', 'Invalid signature', array( 'status' => 403 ) );
}
return $verified;
}