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<?php |
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namespace LibSSH2; |
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use LibSSH2\Authentication\Authentication; |
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use LibSSH2\Builder; |
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use LibSSH2\Configuration; |
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use LibSSH2\Sessions\SSH; |
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use LibSSH2\Sessions\Shell; |
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/** |
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* Kerberos class. |
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* |
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* Create and set the KRB5CCNAME environmental variable for |
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* Kerberos authentication. |
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* |
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* @package LibSSH2 |
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*/ |
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class Kerberos |
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{ |
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private $configuration; |
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private $authentication; |
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/** |
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* Constructor. |
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* |
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* @param instance $configuration Configuration instance |
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* @param instance $authentication Authentication instance |
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* @return void |
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*/ |
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public function __construct(Configuration $configuration, Authentication $authentication) |
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{ |
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if (get_class($authentication) != 'LibSSH2\Authentication\Password') |
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{ |
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throw new \RuntimeException("Kerberos authentication requires Password authentication to remote server."); |
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} |
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$this->configuration = $configuration; |
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$this->authentication = $authentication; |
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} |
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/** |
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* kcreate creates a Kerberos credential (ticket) cache and sets the |
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* KRB5CCNAME environmental variable. |
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* |
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* @return string Kerberos credential cache |
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*/ |
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final public function kcreate($principle) |
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{ |
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$username = $this->configuration->get_username(); |
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$command = (new Builder()) |
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->setPrefix('kinit') |
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->setArguments([$principle]); |
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$shell = new Shell($this->configuration, $this->authentication); |
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$shell |
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->shell() |
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->write("export KRB5CCNAME=`mktemp /tmp/krb5cc_{$username}_XXXXXXXXXXXXX`;") |
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->write($command) |
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->write($this->configuration->get_password()) |
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->write('echo KRB5CCNAME:$KRB5CCNAME', true) |
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->output(); |
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if (!preg_match("/KRB5CCNAME:(\/tmp\/krb5cc_.*)/", $shell->get_output(), $matches)) |
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{ |
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throw new \RuntimeException('Failed to create the Kerberos credential cache and set the KRB5CCNAME environmental variable.'); |
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} |
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return $matches[1]; |
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} |
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/** |
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* The kdestroy utility destroys the user’s active Kerberos |
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* authorization tickets by overwriting and deleting the |
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* credentials cache that contains them. If the credentials |
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* cache is not specified, the default credentials cache is |
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* destroyed. |
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* |
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* @param array $options klist command line options |
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* @param array $arguments klist command line arguments |
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* @return int return code (exit status code) |
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*/ |
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final public function kdestroy(array $options = [], array $arguments = [], $strict = true) |
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{ |
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$command = (new Builder()) |
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->setPrefix('kdestroy') |
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->setOptions($options) |
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->setArguments($arguments); |
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list($retval, $output) = $this->_exec($command, $strict); |
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return $retval; |
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} |
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/** |
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* klist lists the Kerberos principal and Kerberos tickets held |
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* in a credentials cache, or the keys held in a keytab file. |
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* |
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* @param array $options klist command line options |
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* @param array $arguments klist command line arguments |
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* @return string klist results |
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*/ |
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final public function klist(array $options = [], array $arguments = [], $strict = true) |
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{ |
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$command = (new Builder()) |
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->setPrefix('klist') |
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->setOptions($options) |
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->setArguments($arguments); |
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list($retval, $output) = $this->_exec($command, $strict); |
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return $output; |
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} |
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/** |
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* kinit obtains and caches an initial ticket-granting ticket for |
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* principal. If principal is absent, kinit chooses an appropriate |
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* principal name based on existing credential cache contents or |
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* the local username of the user invoking kinit. Some options |
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* modify the choice of principal name. |
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* |
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* @param array $options kinit command line options |
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* @param array $arguments kinit command line arguments |
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* @return int exit status code |
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*/ |
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final public function kinit(array $options = [], array $arguments = [], $strict = true) |
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{ |
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$command = (new Builder()) |
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->setPrefix('kinit') |
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->setOptions($options) |
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->setArguments($arguments); |
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list($retval, $output) = $this->_exec($command, $strict); |
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return $retval; |
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} |
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/** |
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* Execute Kerberos command. |
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* |
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* @param string $command command to be executed |
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* @return array return code and STDOUT |
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*/ |
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final private function _exec($command, $strict) |
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{ |
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$ssh = new SSH($this->configuration, $this->authentication); |
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$ssh->exec($command); |
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$output = $ssh->get_output(); |
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$error = $ssh->get_error(); |
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$retval = $ssh->get_exitstatus(); |
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if ($strict && $retval != 0) |
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{ |
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throw new \RuntimeException($error); |
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} |
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return [$retval, $output]; |
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} |
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} |
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degagne /
libssh2
