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SSH2: more strictly adhere to RFC8332 for rsa-sha2-256/512

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This commit is contained in:
terrafrost 2019-01-15 23:41:49 -06:00
parent a9c0e2d430
commit 055d6097af
1 changed files with 17 additions and 16 deletions
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33
phpseclib/Net/SSH2.php
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@ -2687,6 +2687,21 @@ class Net_SSH2
$publickey['n']
);
switch ($this->signature_format) {
case 'rsa-sha2-512':
$hash = 'sha512';
$signatureType = 'rsa-sha2-512';
break;
case 'rsa-sha2-256':
$hash = 'sha256';
$signatureType = 'rsa-sha2-256';
break;
//case 'ssh-rsa':
default:
$hash = 'sha1';
$signatureType = 'ssh-rsa';
}
$part1 = pack(
'CNa*Na*Na*',
NET_SSH2_MSG_USERAUTH_REQUEST,
@ -2697,7 +2712,7 @@ class Net_SSH2
strlen('publickey'),
'publickey'
);
$part2 = pack('Na*Na*', strlen('ssh-rsa'), 'ssh-rsa', strlen($publickey), $publickey);
$part2 = pack('Na*Na*', strlen($signatureType), $signatureType, strlen($publickey), $publickey);
$packet = $part1 . chr(0) . $part2;
if (!$this->_send_binary_packet($packet)) {
@ -2738,23 +2753,9 @@ class Net_SSH2
$packet = $part1 . chr(1) . $part2;
$privatekey->setSignatureMode(CRYPT_RSA_SIGNATURE_PKCS1);
switch ($this->signature_format) {
case 'rsa-sha2-512':
$hash = 'sha512';
$type = 'rsa-sha2-512';
break;
case 'rsa-sha2-256':
$hash = 'sha256';
$type = 'rsa-sha2-256';
break;
//case 'ssh-rsa':
default:
$hash = 'sha1';
$type = 'ssh-rsa';
}
$privatekey->setHash($hash);
$signature = $privatekey->sign(pack('Na*a*', strlen($this->session_id), $this->session_id, $packet));
$signature = pack('Na*Na*', strlen($type), $type, strlen($signature), $signature);
$signature = pack('Na*Na*', strlen($signatureType), $signatureType, strlen($signature), $signature);
$packet.= pack('Na*', strlen($signature), $signature);
if (!$this->_send_binary_packet($packet)) {