Unable to Connect to Proxy User Using Kerberos Authentication with oci_connect()

[tadasvu]

Can't connect to proxy user while using kerberos.

oci_connect( $username = '[PROXY_USER]', $password = '', $connection_string = 'tns_alias', $encoding = null, $session_mode = 2147483648)

or

oci_connect( $username = 'MY_USER[PROXY_USER]', $password = '', $connection_string = 'tns_alias', $encoding = null, $session_mode = 2147483648)

Warning: oci_connect(): OCI_CRED_EXT can only be used with a username of "/" and a NULL password

pecl-database-oci8/oci8.c

Lines 828 to 831 in 35a0e90

	if (username_len != 1 || username[0] != '/' || password_len != 0) {
	php_error_docref(NULL, E_WARNING, "OCI_CRED_EXT can only be used with a username of \"/\" and a NULL password");
	return NULL;
	}

This logic is causing the error because the username is not /, which is a requirement when using OCI_CRED_EXT for external authentication.

Usual proxy connection string for oracle looks like this while on kerberos:

sqlplus [PROXY_USER]@database

Is this know limitation or there is some other way to achieve this? Thanks.

[mvorisek]

Please repro using #27 in your fork.