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[C2S] Add DPoP (RFC 9449) support for OAuth token binding #3119

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[C2S] Add DPoP (RFC 9449) support for OAuth token binding #3119

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6d5fa06
Add DPoP (RFC 9449) support for OAuth token binding
pfefferle Mar 30, 2026
2c6e303
Add changelog
matticbot Mar 30, 2026
70601f3
Add missing @param for dpop_jkt in exchange() docblock
pfefferle Mar 30, 2026
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4 changes: 4 additions & 0 deletions .github/changelog/3119-from-description
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Original file line number Diff line number Diff line change
@@ -0,0 +1,4 @@
Significance: minor
Type: added

Add DPoP (RFC 9449) support to protect OAuth tokens from theft and replay.
15 changes: 9 additions & 6 deletions includes/oauth/class-authorization-code.php
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Original file line number Diff line number Diff line change
Expand Up @@ -129,13 +129,14 @@ public static function create(
/**
* Exchange authorization code for tokens.
*
* @param string $code The authorization code.
* @param string $client_id The client ID.
* @param string $redirect_uri The redirect URI (must match original).
* @param string $code_verifier The PKCE code verifier.
* @param string $code The authorization code.
* @param string $client_id The client ID.
* @param string $redirect_uri The redirect URI (must match original).
* @param string $code_verifier The PKCE code verifier.
* @param string|null $dpop_jkt Optional DPoP JWK thumbprint for token binding.
* @return array|\WP_Error Token data or error.
*/
public static function exchange( $code, $client_id, $redirect_uri, $code_verifier ) {
public static function exchange( $code, $client_id, $redirect_uri, $code_verifier, $dpop_jkt = null ) {
$redirect_uri = Sanitize::redirect_uri( $redirect_uri );
$code_hash = self::hash_code( $code );
$transient = self::TRANSIENT_PREFIX . $code_hash;
Expand Down Expand Up @@ -195,7 +196,9 @@ public static function exchange( $code, $client_id, $redirect_uri, $code_verifie
return Token::create(
$code_data['user_id'],
$client_id,
$code_data['scopes']
$code_data['scopes'],
Token::DEFAULT_EXPIRATION,
$dpop_jkt
);
}

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