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GUACAMOLE-577: Add support for Proxy Configuration to Connections stored in LDAP.

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This commit is contained in:
Virtually Nick
2021-05-14 10:15:15 -04:00
parent 2799df6797
commit 6fab0f5036
4 changed files with 184 additions and 20 deletions
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27
extensions/guacamole-auth-ldap/schema/guacConfigGroup.ldif
View File

@@ -20,9 +20,24 @@
dn: cn=guacConfigGroup,cn=schema,cn=config
objectClass: olcSchemaConfig
cn: guacConfigGroup
olcAttributeTypes: {0}( 1.3.6.1.4.1.38971.1.1.1 NAME 'guacConfigProtocol' SYNTAX 1.3.6.1.4.1.1466
.115.121.1.15 )
olcAttributeTypes: {1}( 1.3.6.1.4.1.38971.1.1.2 NAME 'guacConfigParameter' SYNTAX 1.3.6.1.4.1.146
6.115.121.1.15 )
olcObjectClasses: {0}( 1.3.6.1.4.1.38971.1.2.1 NAME 'guacConfigGroup' DESC 'Guacamole config
uration group' SUP groupOfNames MUST guacConfigProtocol MAY guacConfigParameter )
olcAttributeTypes: ( 1.3.6.1.4.1.38971.1.1.1 NAME 'guacConfigProtocol'
SYNTAX 1.3.6.1.4.1.1466.115.121.1.15 )
olcAttributeTypes: ( 1.3.6.1.4.1.38971.1.1.2 NAME 'guacConfigParameter'
SYNTAX 1.3.6.1.4.1.1466.115.121.1.15 )
olcAttributeTypes: ( 1.3.6.1.4.1.38971.1.1.3 NAME 'guacConfigProxyHostname'
SYNTAX 1.3.6.1.4.1.1466.115.121.1.15 )
olcAttributeTypes: ( 1.3.6.1.4.1.38971.1.1.4 NAME 'guacConfigProxyPort'
SINGLE-VALUE
SYNTAX 1.3.6.1.4.1.1466.115.121.1.27 )
olcAttributeTypes: ( 1.3.6.1.4.1.38971.1.1.5 NAME 'guacConfigProxyEncryption'
SINGLE-VALUE
SYNTAX 1.3.6.1.4.1.1466.115.121.1.15 )
olcObjectClasses: ( 1.3.6.1.4.1.38971.1.2.1 NAME 'guacConfigGroup'
DESC 'Guacamole configuration group'
SUP groupOfNames
MUST guacConfigProtocol
MAY ( guacConfigParameter $
guacConfigProxyHostname $
guacConfigProxyPort $
guacConfigProxyEncryption ) )

20
extensions/guacamole-auth-ldap/schema/guacConfigGroup.schema
View File

@@ -18,14 +18,28 @@
#
attributetype ( 1.3.6.1.4.1.38971.1.1.1 NAME 'guacConfigProtocol'
SYNTAX 1.3.6.1.4.1.1466.115.121.1.15 )
SYNTAX 1.3.6.1.4.1.1466.115.121.1.15 )
attributetype ( 1.3.6.1.4.1.38971.1.1.2 NAME 'guacConfigParameter'
SYNTAX 1.3.6.1.4.1.1466.115.121.1.15 )
SYNTAX 1.3.6.1.4.1.1466.115.121.1.15 )
attributetype ( 1.3.6.1.4.1.38971.1.1.3 NAME 'guacConfigProxyHostname'
SYNTAX 1.3.6.1.4.1.1466.115.121.1.15 )
attributetype ( 1.3.6.1.4.1.38971.1.1.4 NAME 'guacConfigProxyPort'
SINGLE-VALUE
SYNTAX 1.3.6.1.4.1.1466.115.121.1.27 )
attributetype ( 1.3.6.1.4.1.38971.1.1.5 NAME 'guacConfigProxyEncryption'
SINGLE-VALUE
SYNTAX 1.3.6.1.4.1.1466.115.121.1.15 )
objectClass ( 1.3.6.1.4.1.38971.1.2.1 NAME 'guacConfigGroup'
DESC 'Guacamole configuration group'
SUP groupOfNames
MUST guacConfigProtocol
MAY guacConfigParameter )
MAY ( guacConfigParameter $
guacConfigProxyHostname $
guacConfigProxyPort $
guacConfigProxyEncryption ) )

112
extensions/guacamole-auth-ldap/src/main/java/org/apache/guacamole/auth/ldap/connection/ConnectionService.java
View File

@@ -42,7 +42,11 @@ import org.apache.guacamole.auth.ldap.ConnectedLDAPConfiguration;
import org.apache.guacamole.auth.ldap.ObjectQueryService;
import org.apache.guacamole.auth.ldap.group.UserGroupService;
import org.apache.guacamole.auth.ldap.user.LDAPAuthenticatedUser;
import org.apache.guacamole.environment.LocalEnvironment;
import org.apache.guacamole.net.auth.AuthenticatedUser;
import org.apache.guacamole.net.auth.Connection;
import org.apache.guacamole.net.auth.GuacamoleProxyConfiguration;
import org.apache.guacamole.net.auth.GuacamoleProxyConfiguration.EncryptionMethod;
import org.apache.guacamole.net.auth.TokenInjectingConnection;
import org.apache.guacamole.net.auth.simple.SimpleConnection;
import org.apache.guacamole.protocol.GuacamoleConfiguration;
@@ -59,6 +63,33 @@ public class ConnectionService {
* Logger for this class.
*/
private static final Logger logger = LoggerFactory.getLogger(ConnectionService.class);
/**
* The name of the LDAP attribute that stores connection configuration
* parameters for Guacamole.
*/
public static final String LDAP_ATTRIBUTE_PARAMETER = "guacConfigParameter";
/**
* The name of the LDAP attribute that stores the protocol for a Guacamole
* connection.
*/
public static final String LDAP_ATTRIBUTE_PROTOCOL = "guacConfigProtocol";
/**
* The name of the LDAP attribute that stores guacd proxy hostname.
*/
public static final String LDAP_ATTRIBUTE_PROXY_HOSTNAME = "guacConfigProxyHostname";
/**
* The name of the LDAP attribute that stores guacd proxy port.
*/
public static final String LDAP_ATTRIBUTE_PROXY_PORT = "guacConfigProxyPort";
/**
* The name of the LDAP attribute that stores guacd proxy hostname.
*/
public static final String LDAP_ATTRIBUTE_PROXY_ENCRYPTION = "guacConfigProxyEncryption";
/**
* Service for executing LDAP queries.
@@ -192,11 +223,21 @@ public class ConnectionService {
config.setProtocol(protocol.getString());
}
catch (LdapInvalidAttributeValueException e) {
logger.error("Invalid value of the protocol entry: {}",
e.getMessage());
logger.error("Invalid value of the protocol entry: {}", e.getMessage());
logger.debug("LDAP exception when getting protocol value.", e);
return null;
}
// Get proxy configuration, if any
GuacamoleProxyConfiguration proxyConfig;
try {
proxyConfig = getProxyConfiguration(entry);
}
catch (GuacamoleException e) {
logger.error("Failed to retrieve proxy configuration.", e.getMessage());
logger.debug("Guacamole Exception when retrieving proxy configuration.", e);
return null;
}
// Get parameters, if any
Attribute parameterAttribute = entry.get(LDAP_ATTRIBUTE_NAME_PARAMETER);
@@ -209,10 +250,8 @@ public class ConnectionService {
parameter = parameterAttribute.getString();
}
catch (LdapInvalidAttributeValueException e) {
logger.warn("Parameter value not valid for {}: {}",
cnName, e.getMessage());
logger.debug("LDAP exception when getting parameter value.",
e);
logger.warn("Parameter value not valid for {}: {}", cnName, e.getMessage());
logger.debug("LDAP exception when getting parameter value.", e);
return null;
}
parameterAttribute.remove(parameter);
@@ -234,7 +273,7 @@ public class ConnectionService {
}
// Store connection using cn for both identifier and name
Connection connection = new SimpleConnection(cnName, cnName, config, true);
Connection connection = new SimpleConnection(cnName, cnName, proxyConfig, config, true);
connection.setParentIdentifier(LDAPAuthenticationProvider.ROOT_CONNECTION_GROUP);
// Inject LDAP-specific tokens only if LDAP handled user
@@ -301,5 +340,64 @@ public class ConnectionService {
return searchFilter;
}
/**
* Given an LDAP entry that stores a GuacamoleConfiguration, generate a
* GuacamoleProxyConfiguration that tells the client how to connect to guacd.
* If the proxy configuration values are not found in the LDAP entry the
* defaults from the environment are used. If errors occur while trying to
* ready or parse values from the LDAP entry a GuacamoleException is thrown.
*
* @param connectionEntry
* The LDAP entry that should be checked for proxy configuration values.
*
* @return
* The GuacamoleProxyConfiguration that contains information on how
* to contact guacd for the given Guacamole connection configuration.
*
* @throws GuacamoleException
* If errors occur trying to parse LDAP values from the entry.
*/
private GuacamoleProxyConfiguration getProxyConfiguration(Entry connectionEntry)
throws GuacamoleException {
try {
// Get default proxy configuration values
GuacamoleProxyConfiguration proxyConfig = LocalEnvironment.getInstance().getDefaultGuacamoleProxyConfiguration();
String proxyHostname = proxyConfig.getHostname();
int proxyPort = proxyConfig.getPort();
EncryptionMethod proxyEncryption = proxyConfig.getEncryptionMethod();
// Get the proxy hostname
Attribute proxyHostAttr = connectionEntry.get(LDAP_ATTRIBUTE_PROXY_HOSTNAME);
if (proxyHostAttr != null && proxyHostAttr.size() > 0)
proxyHostname = proxyHostAttr.getString();
// Get the proxy port
Attribute proxyPortAttr = connectionEntry.get(LDAP_ATTRIBUTE_PROXY_PORT);
if (proxyPortAttr != null && proxyPortAttr.size() > 0)
proxyPort = Integer.parseInt(proxyPortAttr.getString());
// Get the proxy encryption method
Attribute proxyEncryptionAttr = connectionEntry.get(LDAP_ATTRIBUTE_PROXY_ENCRYPTION);
if (proxyEncryptionAttr != null && proxyEncryptionAttr.size() > 0) {
try {
proxyEncryption = EncryptionMethod.valueOf(proxyEncryptionAttr.getString());
}
catch (IllegalArgumentException e) {
throw new GuacamoleServerException("Unknown encryption method specified, value must be either \"NONE\" or \"SSL\".", e);
}
}
// Return a new proxy configuration
return new GuacamoleProxyConfiguration(proxyHostname, proxyPort, proxyEncryption);
}
catch (LdapInvalidAttributeValueException e) {
logger.error("Invalid value in proxy configuration: {}", e.getMessage());
logger.debug("LDAP exception fetching proxy attribute value.", e);
throw new GuacamoleServerException("Invalid LDAP value in proxy configuration.", e);
}
}
}