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Merge branch '2.0'

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This commit is contained in:
terrafrost 2018-11-22 21:55:51 -06:00
commit e006f5b326
2 changed files with 63 additions and 25 deletions
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33
phpseclib/Net/SSH2.php
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@ -2570,7 +2570,9 @@ class SSH2
$this->agent = $agent;
$keys = $agent->requestIdentities();
foreach ($keys as $key) {
echo "so far\n";
if ($this->privatekey_login($username, $key)) {
echo "so good!?\n";
return true;
}
}
@ -2664,24 +2666,19 @@ class SSH2
}
$packet = $part1 . chr(1) . $part2;
if ($privatekey instanceof AgentIdentity) {
$hash = 'sha1';
$type = 'ssh-rsa';
} else {
switch ($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';
$type = 'ssh-rsa';
}
switch ($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), RSA::PADDING_PKCS1);

55
phpseclib/System/SSH/Agent/Identity.php
View File

@ -19,6 +19,7 @@ namespace phpseclib\System\SSH\Agent;
use phpseclib\Crypt\RSA;
use phpseclib\Exception\UnsupportedAlgorithmException;
use phpseclib\System\SSH\Agent;
use phpseclib\Common\Functions\Strings;
/**
* Pure-PHP ssh-agent client identity object
@ -35,6 +36,17 @@ use phpseclib\System\SSH\Agent;
*/
class Identity
{
/**@+
* Signature Flags
*
* See https://tools.ietf.org/html/draft-miller-ssh-agent-00#section-5.3
*
* @access private
*/
const SSH_AGENT_RSA2_256 = 2;
const SSH_AGENT_RSA2_512 = 4;
/**#@-*/
/**
* Key Object
*
@ -62,6 +74,16 @@ class Identity
*/
private $fsock;
/**
* Signature flags
*
* @var int
* @access private
* @see self::sign()
* @see self::setHash()
*/
var $flags = 0;
/**
* Default Constructor.
*
@ -124,10 +146,20 @@ class Identity
* @param string $hash optional
* @access public
*/
public function setHash($hash = 'sha1')
public function setHash($hash)
{
if ($hash != 'sha1') {
throw new UnsupportedAlgorithmException('ssh-agent can only be used with the sha1 hash');
$this->flags = 0;
switch ($hash) {
case 'sha1':
break;
case 'sha256':
$this->flags = self::SSH_AGENT_RSA2_256;
break;
case 'sha512':
$this->flags = self::SSH_AGENT_RSA2_512;
break;
default:
throw new UnsupportedAlgorithmException('The only supported hashes for RSA are sha1, sha256 and sha512');
}
}
@ -150,7 +182,7 @@ class Identity
}
// the last parameter (currently 0) is for flags and ssh-agent only defines one flag (for ssh-dss): SSH_AGENT_OLD_SIGNATURE
$packet = pack('CNa*Na*N', Agent::SSH_AGENTC_SIGN_REQUEST, strlen($this->key_blob), $this->key_blob, strlen($message), $message, 0);
$packet = pack('CNa*Na*N', Agent::SSH_AGENTC_SIGN_REQUEST, strlen($this->key_blob), $this->key_blob, strlen($message), $message, $this->flags);
$packet = pack('Na*', strlen($packet), $packet);
if (strlen($packet) != fputs($this->fsock, $packet)) {
throw new \RuntimeException('Connection closed during signing');
@ -163,8 +195,17 @@ class Identity
}
$signature_blob = fread($this->fsock, $length - 1);
// the only other signature format defined - ssh-dss - is the same length as ssh-rsa
// the + 12 is for the other various SSH added length fields
return substr($signature_blob, strlen('ssh-rsa') + 12);
$length = current(unpack('N', Strings::shift($signature_blob, 4)));
if ($length != strlen($signature_blob)) {
throw new \RuntimeException('Malformed signature blob');
}
$length = current(unpack('N', Strings::shift($signature_blob, 4)));
if ($length > strlen($signature_blob) + 4) {
throw new \RuntimeException('Malformed signature blob');
}
$type = Strings::shift($signature_blob, $length);
Strings::shift($signature_blob, 4);
return $signature_blob;
}
}