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Merge branch '3.0'

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This commit is contained in:
terrafrost 2022-01-30 01:59:16 -06:00
commit 41bca090c2
3 changed files with 99 additions and 43 deletions
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7
phpseclib/Crypt/Common/SymmetricKey.php
View File

@ -213,13 +213,6 @@ abstract class SymmetricKey
self::ENGINE_OPENSSL_GCM => 'OpenSSL (GCM)'
];
/** @var string|null */
public $fixed;
/** @var string|null */
public $invocation_counter;
/** @var string|null */
public $name;
/**
* The Encryption Mode
*

5
phpseclib/Crypt/Hash.php
View File

@ -69,11 +69,6 @@ class Hash
*/
const PADDING_SHAKE = 3;
/** @var int|false */
public $etm;
/** @var string|false */
public $name;
/**
* Padding Type
*

130
phpseclib/Net/SSH2.php
View File

@ -410,6 +410,24 @@ class SSH2
*/
private $decrypt = false;
/**
* Decryption Algorithm Name
*
* @var string|null
* @access private
*/
private $decryptName;
/**
* Decryption Invocation Counter
*
* Used by GCM
*
* @var string|null
* @access private
*/
private $decryptInvocationCounter;
/**
* Server to Client Length Encryption Object
*
@ -428,6 +446,24 @@ class SSH2
*/
private $encrypt = false;
/**
* Encryption Algorithm Name
*
* @var string|null
* @access private
*/
private $encryptName;
/**
* Encryption Invocation Counter
*
* Used by GCM
*
* @var string|null
* @access private
*/
private $encryptInvocationCounter;
/**
* Client to Server Length Encryption Object
*
@ -446,6 +482,22 @@ class SSH2
*/
private $hmac_create = false;
/**
* Client to Server HMAC Name
*
* @var string|false
* @access private
*/
private $hmac_create_name;
/**
* Client to Server ETM
*
* @var int|false
* @access private
*/
private $hmac_create_etm;
/**
* Server to Client HMAC Object
*
@ -455,6 +507,22 @@ class SSH2
*/
private $hmac_check = false;
/**
* Server to Client HMAC Name
*
* @var string|false
* @access private
*/
private $hmac_check_name;
/**
* Server to Client ETM
*
* @var int|false
* @access private
*/
private $hmac_check_etm;
/**
* Size of server to client HMAC
*
@ -1860,7 +1928,7 @@ class SSH2
case 'aes256-gcm@openssh.com':
$nonce = $kexHash->hash($keyBytes . $this->exchange_hash . 'A' . $this->session_id);
$this->encrypt->fixed = substr($nonce, 0, 4);
$this->encrypt->invocation_counter = substr($nonce, 4, 8);
$this->encryptInvocationCounter = substr($nonce, 4, 8);
case 'chacha20-poly1305@openssh.com':
break;
default:
@ -1878,7 +1946,7 @@ class SSH2
$this->lengthEncrypt->setKey(substr($key, 32, 32));
}
$this->encrypt->setKey(substr($key, 0, $encryptKeyLength));
$this->encrypt->name = $encrypt;
$this->encryptName = $encrypt;
}
$this->decrypt = self::encryption_algorithm_to_crypt_instance($decrypt);
@ -1905,7 +1973,7 @@ class SSH2
// see https://tools.ietf.org/html/rfc5647#section-7.1
$nonce = $kexHash->hash($keyBytes . $this->exchange_hash . 'B' . $this->session_id);
$this->decrypt->fixed = substr($nonce, 0, 4);
$this->decrypt->invocation_counter = substr($nonce, 4, 8);
$this->decryptInvocationCounter = substr($nonce, 4, 8);
case 'chacha20-poly1305@openssh.com':
break;
default:
@ -1923,7 +1991,7 @@ class SSH2
$this->lengthDecrypt->setKey(substr($key, 32, 32));
}
$this->decrypt->setKey(substr($key, 0, $decryptKeyLength));
$this->decrypt->name = $decrypt;
$this->decryptName = $decrypt;
}
/* The "arcfour128" algorithm is the RC4 cipher, as described in
@ -1944,7 +2012,7 @@ class SSH2
list($this->hmac_create, $createKeyLength) = self::mac_algorithm_to_hash_instance($mac_algorithm_out);
} else {
$this->hmac_create = new \stdClass;
$this->hmac_create->name = $mac_algorithm_out;
$this->hmac_create_name = $mac_algorithm_out;
//$mac_algorithm_out = 'none';
$createKeyLength = 0;
}
@ -1955,8 +2023,8 @@ class SSH2
$key.= $kexHash->hash($keyBytes . $this->exchange_hash . $key);
}
$this->hmac_create->setKey(substr($key, 0, $createKeyLength));
$this->hmac_create->name = $mac_algorithm_out;
$this->hmac_create->etm = preg_match('#-etm@openssh\.com$#', $mac_algorithm_out);
$this->hmac_create_name = $mac_algorithm_out;
$this->hmac_create_etm = preg_match('#-etm@openssh\.com$#', $mac_algorithm_out);
}
if (!$this->decrypt->usesNonce()) {
@ -1964,7 +2032,7 @@ class SSH2
$this->hmac_size = $this->hmac_check->getLengthInBytes();
} else {
$this->hmac_check = new \stdClass;
$this->hmac_check->name = $mac_algorithm_in;
$this->hmac_check_name = $mac_algorithm_in;
//$mac_algorithm_in = 'none';
$checkKeyLength = 0;
$this->hmac_size = 0;
@ -1976,8 +2044,8 @@ class SSH2
$key.= $kexHash->hash($keyBytes . $this->exchange_hash . $key);
}
$this->hmac_check->setKey(substr($key, 0, $checkKeyLength));
$this->hmac_check->name = $mac_algorithm_in;
$this->hmac_check->etm = preg_match('#-etm@openssh\.com$#', $mac_algorithm_in);
$this->hmac_check_name = $mac_algorithm_in;
$this->hmac_check_etm = preg_match('#-etm@openssh\.com$#', $mac_algorithm_in);
}
$this->regenerate_compression_context = $this->regenerate_decompression_context = true;
@ -3367,14 +3435,14 @@ class SSH2
}
if ($this->decrypt) {
switch ($this->decrypt->name) {
switch ($this->decryptName) {
case 'aes128-gcm@openssh.com':
case 'aes256-gcm@openssh.com':
$this->decrypt->setNonce(
$this->decrypt->fixed .
$this->decrypt->invocation_counter
$this->decryptInvocationCounter
);
Strings::increment_str($this->decrypt->invocation_counter);
Strings::increment_str($this->decryptInvocationCounter);
$this->decrypt->setAAD($temp = Strings::shift($raw, 4));
extract(unpack('Npacket_length', $temp));
/**
@ -3419,7 +3487,7 @@ class SSH2
$remaining_length = 0;
break;
default:
if (!$this->hmac_check instanceof Hash || !$this->hmac_check->etm) {
if (!$this->hmac_check instanceof Hash || !$this->hmac_check_etm) {
$raw = $this->decrypt->decrypt($raw);
break;
}
@ -3468,7 +3536,7 @@ class SSH2
throw new \RuntimeException('Error reading socket');
}
$reconstructed = !$this->hmac_check->etm ?
$reconstructed = !$this->hmac_check_etm ?
pack('NCa*', $packet_length, $padding_length, $payload . $padding) :
$encrypted;
if (($this->hmac_check->getHash() & "\xFF\xFF\xFF\xFF") == 'umac') {
@ -3552,10 +3620,10 @@ class SSH2
$adjustLength = false;
if ($this->decrypt) {
switch (true) {
case $this->decrypt->name == 'aes128-gcm@openssh.com':
case $this->decrypt->name == 'aes256-gcm@openssh.com':
case $this->decrypt->name == 'chacha20-poly1305@openssh.com':
case $this->hmac_check instanceof Hash && $this->hmac_check->etm:
case $this->decryptName == 'aes128-gcm@openssh.com':
case $this->decryptName == 'aes256-gcm@openssh.com':
case $this->decryptName == 'chacha20-poly1305@openssh.com':
case $this->hmac_check instanceof Hash && $this->hmac_check_etm:
$remaining_length+= $this->decrypt_block_size - 4;
$adjustLength = true;
}
@ -3566,7 +3634,7 @@ class SSH2
// PuTTY uses 0x9000 as the actual max packet size and so to shall we
// don't do this when GCM mode is used since GCM mode doesn't encrypt the length
if ($remaining_length < -$this->decrypt_block_size || $remaining_length > 0x9000 || $remaining_length % $this->decrypt_block_size != 0) {
if (!$this->bad_key_size_fix && self::bad_algorithm_candidate($this->decrypt ? $this->decrypt->name : '') && !($this->bitmap & SSH2::MASK_LOGIN)) {
if (!$this->bad_key_size_fix && self::bad_algorithm_candidate($this->decrypt ? $this->decryptName : '') && !($this->bitmap & SSH2::MASK_LOGIN)) {
$this->bad_key_size_fix = true;
$this->reset_connection(NET_SSH2_DISCONNECT_KEY_EXCHANGE_FAILED);
return false;
@ -4104,7 +4172,7 @@ class SSH2
$padding_length = $packet_length - strlen($data) - 5;
switch (true) {
case $this->encrypt && $this->encrypt->usesNonce():
case $this->hmac_create instanceof Hash && $this->hmac_create->etm:
case $this->hmac_create instanceof Hash && $this->hmac_create_etm:
$padding_length+= 4;
$packet_length+= 4;
}
@ -4115,7 +4183,7 @@ class SSH2
$packet = pack('NCa*', $packet_length - 4, $padding_length, $data . $padding);
$hmac = '';
if ($this->hmac_create instanceof Hash && !$this->hmac_create->etm) {
if ($this->hmac_create instanceof Hash && !$this->hmac_create_etm) {
if (($this->hmac_create->getHash() & "\xFF\xFF\xFF\xFF") == 'umac') {
$this->hmac_create->setNonce("\0\0\0\0" . pack('N', $this->send_seq_no));
$hmac = $this->hmac_create->hash($packet);
@ -4125,14 +4193,14 @@ class SSH2
}
if ($this->encrypt) {
switch ($this->encrypt->name) {
switch ($this->encryptName) {
case 'aes128-gcm@openssh.com':
case 'aes256-gcm@openssh.com':
$this->encrypt->setNonce(
$this->encrypt->fixed .
$this->encrypt->invocation_counter
$this->encryptInvocationCounter
);
Strings::increment_str($this->encrypt->invocation_counter);
Strings::increment_str($this->encryptInvocationCounter);
$this->encrypt->setAAD($temp = ($packet & "\xFF\xFF\xFF\xFF"));
$packet = $temp . $this->encrypt->encrypt(substr($packet, 4));
break;
@ -4156,13 +4224,13 @@ class SSH2
$packet = $length . $this->encrypt->encrypt(substr($packet, 4));
break;
default:
$packet = $this->hmac_create instanceof Hash && $this->hmac_create->etm ?
$packet = $this->hmac_create instanceof Hash && $this->hmac_create_etm ?
($packet & "\xFF\xFF\xFF\xFF") . $this->encrypt->encrypt(substr($packet, 4)) :
$this->encrypt->encrypt($packet);
}
}
if ($this->hmac_create instanceof Hash && $this->hmac_create->etm) {
if ($this->hmac_create instanceof Hash && $this->hmac_create_etm) {
if (($this->hmac_create->getHash() & "\xFF\xFF\xFF\xFF") == 'umac') {
$this->hmac_create->setNonce("\0\0\0\0" . pack('N', $this->send_seq_no));
$hmac = $this->hmac_create->hash($packet);
@ -4798,13 +4866,13 @@ class SSH2
'kex' => $this->kex_algorithm,
'hostkey' => $this->signature_format,
'client_to_server' => [
'crypt' => $this->encrypt->name,
'mac' => $this->hmac_create->name,
'crypt' => $this->encryptName,
'mac' => $this->hmac_create_name,
'comp' => $compression_map[$this->compress],
],
'server_to_client' => [
'crypt' => $this->decrypt->name,
'mac' => $this->hmac_check->name,
'crypt' => $this->decryptName,
'mac' => $this->hmac_check_name,
'comp' => $compression_map[$this->decompress],
]
];