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Ensure the existence of various keys in decoded data in Diaspora::decodeRaw

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- Address https://github.com/friendica/friendica/issues/11994#issuecomment-1302681295
This commit is contained in:
Hypolite Petovan 2022-11-23 11:22:54 -05:00
parent c356c962f1
commit d2ea58428d
1 changed files with 26 additions and 11 deletions
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37
src/Protocol/Diaspora.php
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@ -224,14 +224,34 @@ class Diaspora
// Is it a private post? Then decrypt the outer Salmon // Is it a private post? Then decrypt the outer Salmon
if (is_object($data)) { if (is_object($data)) {
$encrypted_aes_key_bundle = base64_decode($data->aes_key); try {
$ciphertext = base64_decode($data->encrypted_magic_envelope); if (!isset($data->aes_key) || !isset($data->encrypted_magic_envelope)) {
Logger::info('Missing keys "aes_key" and/or "encrypted_magic_envelope"', ['data' => $data]);
throw new \RuntimeException('Missing keys "aes_key" and/or "encrypted_magic_envelope"');
}
$outer_key_bundle = ''; $encrypted_aes_key_bundle = base64_decode($data->aes_key);
@openssl_private_decrypt($encrypted_aes_key_bundle, $outer_key_bundle, $privKey); $ciphertext = base64_decode($data->encrypted_magic_envelope);
$j_outer_key_bundle = json_decode($outer_key_bundle);
if (!is_object($j_outer_key_bundle)) { $outer_key_bundle = '';
@openssl_private_decrypt($encrypted_aes_key_bundle, $outer_key_bundle, $privKey);
$j_outer_key_bundle = json_decode($outer_key_bundle);
if (!is_object($j_outer_key_bundle)) {
Logger::info('Unable to decode outer key bundle', ['outer_key_bundle' => $outer_key_bundle]);
throw new \RuntimeException('Unable to decode outer key bundle');
}
if (!isset($j_outer_key_bundle->iv) || !isset($j_outer_key_bundle->key)) {
Logger::info('Missing keys "iv" and/or "key" from outer Salmon', ['j_outer_key_bundle' => $j_outer_key_bundle]);
throw new \RuntimeException('Missing keys "iv" and/or "key" from outer Salmon');
}
$outer_iv = base64_decode($j_outer_key_bundle->iv);
$outer_key = base64_decode($j_outer_key_bundle->key);
$xml = self::aesDecrypt($outer_key, $outer_iv, $ciphertext);
} catch (\Throwable $e) {
Logger::notice('Outer Salmon did not verify. Discarding.'); Logger::notice('Outer Salmon did not verify. Discarding.');
if ($no_exit) { if ($no_exit) {
return false; return false;
@ -239,11 +259,6 @@ class Diaspora
throw new \Friendica\Network\HTTPException\BadRequestException(); throw new \Friendica\Network\HTTPException\BadRequestException();
} }
} }
$outer_iv = base64_decode($j_outer_key_bundle->iv);
$outer_key = base64_decode($j_outer_key_bundle->key);
$xml = self::aesDecrypt($outer_key, $outer_iv, $ciphertext);
} else { } else {
$xml = $raw; $xml = $raw;
} }