Event-Federation/wordpress-activitypub
Event-Federation/wordpress-activitypub
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add digest header

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This commit is contained in:
Django Doucet 2020-12-09 22:23:05 -05:00
parent f418e823c5
commit 0271b57844
2 changed files with 19 additions and 4 deletions
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15
includes/class-signature.php
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@ -70,7 +70,7 @@ class Signature {
\update_user_meta( $user_id, 'magic_sig_public_key', $detail['key'] ); \update_user_meta( $user_id, 'magic_sig_public_key', $detail['key'] );
} }
public static function generate_signature( $user_id, $url, $date ) { public static function generate_signature( $user_id, $url, $date, $digest = null ) {
$key = self::get_private_key( $user_id ); $key = self::get_private_key( $user_id );
$url_parts = \wp_parse_url( $url ); $url_parts = \wp_parse_url( $url );
@ -88,7 +88,11 @@ class Signature {
$path .= '?' . $url_parts['query']; $path .= '?' . $url_parts['query'];
} }
if ( ! empty( $digest ) ) {
$signed_string = "(request-target): post $path\nhost: $host\ndate: $date\ndigest: SHA-256=$digest";
} else {
$signed_string = "(request-target): post $path\nhost: $host\ndate: $date"; $signed_string = "(request-target): post $path\nhost: $host\ndate: $date";
}
$signature = null; $signature = null;
\openssl_sign( $signed_string, $signature, $key, \OPENSSL_ALGO_SHA256 ); \openssl_sign( $signed_string, $signature, $key, \OPENSSL_ALGO_SHA256 );
@ -96,10 +100,19 @@ class Signature {
$key_id = \get_author_posts_url( $user_id ) . '#main-key'; $key_id = \get_author_posts_url( $user_id ) . '#main-key';
if ( ! empty( $digest ) ) {
return \sprintf( 'keyId="%s",algorithm="rsa-sha256",headers="(request-target) host date digest",signature="%s"', $key_id, $signature );
} else {
return \sprintf( 'keyId="%s",algorithm="rsa-sha256",headers="(request-target) host date",signature="%s"', $key_id, $signature ); return \sprintf( 'keyId="%s",algorithm="rsa-sha256",headers="(request-target) host date",signature="%s"', $key_id, $signature );
} }
}
public static function verify_signature( $headers, $signature ) { public static function verify_signature( $headers, $signature ) {
} }
public static function generate_digest( $body ) {
$digest = \base64_encode( \hash('sha256', $body, true ) ); // phpcs:ignore
return "$digest";
}
} }

4
includes/functions.php
View file

@ -23,7 +23,8 @@ function get_context() {
function safe_remote_post( $url, $body, $user_id ) { function safe_remote_post( $url, $body, $user_id ) {
$date = \gmdate( 'D, d M Y H:i:s T' ); $date = \gmdate( 'D, d M Y H:i:s T' );
$signature = \Activitypub\Signature::generate_signature( $user_id, $url, $date ); $digest = \Activitypub\Signature::generate_digest( $body );
$signature = \Activitypub\Signature::generate_signature( $user_id, $url, $date, $digest );
$wp_version = \get_bloginfo( 'version' ); $wp_version = \get_bloginfo( 'version' );
$user_agent = \apply_filters( 'http_headers_useragent', 'WordPress/' . $wp_version . '; ' . \get_bloginfo( 'url' ) ); $user_agent = \apply_filters( 'http_headers_useragent', 'WordPress/' . $wp_version . '; ' . \get_bloginfo( 'url' ) );
@ -35,6 +36,7 @@ function safe_remote_post( $url, $body, $user_id ) {
'headers' => array( 'headers' => array(
'Accept' => 'application/activity+json', 'Accept' => 'application/activity+json',
'Content-Type' => 'application/activity+json', 'Content-Type' => 'application/activity+json',
'Digest' => "SHA-256=$digest",
'Signature' => $signature, 'Signature' => $signature,
'Date' => $date, 'Date' => $date,
), ),