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Recover malformed JWT public key end marker

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ykiakao
2026-05-21 13:39:42 -05:00
parent 99f35c64ad
commit 6c54a438dd
3 changed files with 34 additions and 0 deletions
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12
app/Http/Middleware/JwtAuthMiddleware.php
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@@ -166,6 +166,18 @@ class JwtAuthMiddleware
. "-----END {$type}-----\n";
}
if (preg_match('/-----BEGIN ([A-Z ]*PUBLIC KEY)-----(.*)/s', $publicKey, $matches)) {
$type = $matches[1];
$bodySource = preg_split('/-----END|END\s+(?:RSA\s+)?PUBLIC\s+KEY/i', $matches[2], 2)[0];
$body = preg_replace('/[^A-Za-z0-9+\/=]/', '', $bodySource);
if (strlen($body) > 100) {
return "-----BEGIN {$type}-----\n"
. chunk_split($body, 64, "\n")
. "-----END {$type}-----\n";
}
}
if (!str_contains($publicKey, '-----BEGIN')) {
$body = preg_replace('/[^A-Za-z0-9+\/=]/', '', $publicKey);