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javax.security.sasl
Class Sasl
java.lang.Object
javax.security.sasl.Sasl
-
public class Sasl
- extends Object
A static class for creating SASL clients and servers.
This class defines the policy of how to locate, load, and instantiate SASL clients and servers.
For example, an application or library gets a SASL client by doing something like:
SaslClient sc = Sasl.createSaslClient(mechanisms,
authorizationId, protocol, serverName, props, callbackHandler);
It can then proceed to use the instance to create an authentication connection.
Similarly, a server gets a SASL server by using code that looks as follows:
SaslServer ss = Sasl.createSaslServer(mechanism,
protocol, serverName, props, callbackHandler);
-
Since:
-
1.5
Field Summary
|
static
String
|
MAX_BUFFER
The name of a property that specifies the maximum size of the receive buffer in bytes of
SaslClient
/
SaslServer
. |
static
String
|
POLICY_FORWARD_SECRECY
The name of a property that specifies whether mechanisms that implement forward secrecy between sessions are required. |
static
String
|
POLICY_NOACTIVE
The name of a property that specifies whether mechanisms susceptible to active (non-dictionary) attacks are not permitted. |
static
String
|
POLICY_NOANONYMOUS
The name of a property that specifies whether mechanisms that accept anonymous login are not permitted. |
static
String
|
POLICY_NODICTIONARY
The name of a property that specifies whether mechanisms susceptible to passive dictionary attacks are not permitted. |
static
String
|
POLICY_NOPLAINTEXT
The name of a property that specifies whether mechanisms susceptible to simple plain passive attacks (e.g., "PLAIN") are not permitted. |
static
String
|
POLICY_PASS_CREDENTIALS
The name of a property that specifies whether mechanisms that pass client credentials are required. |
static
String
|
QOP
The name of a property that specifies the quality-of-protection to use. |
static
String
|
RAW_SEND_SIZE
The name of a property that specifies the maximum size of the raw send buffer in bytes of
SaslClient
/
SaslServer
. |
static
String
|
REUSE
The name of a property that specifies whether to reuse previously authenticated session information. |
static
String
|
SERVER_AUTH
The name of a property that specifies whether the server must authenticate to the client. |
static
String
|
STRENGTH
The name of a property that specifies the cipher strength to use. |
Method Summary
|
static
SaslClient
|
createSaslClient
(
String
[] mechanisms,
String
authorizationId,
String
protocol,
String
serverName,
Map
<? super
<
String
,?> props,
CallbackHandler
Creates a
SaslClient
using the parameters supplied. |
static
SaslServer
|
createSaslServer
(
String
mechanism,
String
protocol,
String
serverName,
Map
<? super
<
String
,?> props,
CallbackHandler
Creates a
SaslServer
for the specified mechanism. |
static
Enumeration
<
SaslClientFactory
> |
getSaslClientFactories
()
Gets an enumeration of known factories for producing
SaslClient
. |
static
Enumeration
<
SaslServerFactory
> |
getSaslServerFactories
()
Gets an enumeration of known factories for producing
SaslServer
. |
Methods inherited from class java.lang.
Object
|
clone
,
equals
,
finalize
,
getClass
,
hashCode
,
notify
,
notifyAll
,
toString
,
wait
,
wait
,
wait
|
QOP
public static final String QOP
-
The name of a property that specifies the quality-of-protection to use. The property contains a comma-separated, ordered list of quality-of-protection values that the client or server is willing to support. A qop value is one of
-
"auth"
- authentication only
-
"auth-int"
- authentication plus integrity protection
-
"auth-conf"
- authentication plus integrity and confidentiality protection
The order of the list specifies the preference order of the client or server. If this property is absent, the default qop is
"auth"
. The value of this constant is
"javax.security.sasl.qop"
.
-
See Also:
-
Constant Field Values
STRENGTH
public static final String STRENGTH
-
The name of a property that specifies the cipher strength to use. The property contains a comma-separated, ordered list of cipher strength values that the client or server is willing to support. A strength value is one of
The order of the list specifies the preference order of the client or server. An implementation should allow configuration of the meaning of these values. An application may use the Java Cryptography Extension (JCE) with JCE-aware mechanisms to control the selection ofcipher suites that match the strength values.
If this property is absent, the default strength is
"high,medium,low"
. The value of this constant is
"javax.security.sasl.strength"
.
-
See Also:
-
Constant Field Values
SERVER_AUTH
public static final String SERVER_AUTH
-
The name of a property that specifies whether the server must authenticate to the client. The property contains
"true"
if the server must authenticate the to client;
"false"
otherwise. The default is
"false"
.
The value of this constant is
"javax.security.sasl.server.authentication"
.
-
See Also:
-
Constant Field Values
MAX_BUFFER
public static final String MAX_BUFFER
-
The name of a property that specifies the maximum size of the receive buffer in bytes of
SaslClient
/
SaslServer
. The property contains the string representation of an integer.
If this property is absent, the default size is defined by the mechanism.
The value of this constant is
"javax.security.sasl.maxbuffer"
.
-
See Also:
-
Constant Field Values
RAW_SEND_SIZE
public static final String RAW_SEND_SIZE
-
The name of a property that specifies the maximum size of the raw send buffer in bytes of
SaslClient
/
SaslServer
. The property contains the string representation of an integer. The value of this property is negotiated between the client and server during the authentication exchange.
The value of this constant is
"javax.security.sasl.rawsendsize"
.
-
See Also:
-
Constant Field Values
REUSE
public static final String REUSE
-
The name of a property that specifies whether to reuse previously authenticated session information. The property contains "true" if the mechanism implementation may attempt to reuse previously authenticated session information; it contains "false" if the implementation must not reuse previously authenticated session information. A setting of "true" serves only as a hint: it does not necessarily entail actual reuse because reuse might not be possible due to a number of reasons, including, but not limited to, lack of mechanism support for reuse, expiration of reusable information, and the peer's refusal to support reuse. The property's default value is "false". The value of this constant is "javax.security.sasl.reuse". Note that all other parameters and properties required to create a SASL client/server instance must be provided regardless of whether this property has been supplied. That is, you cannot supply any less information in anticipation of reuse. Mechanism implementations that support reuse might allow customization of its implementation, for factors such as cache size, timeouts, and criteria for reuseability. Such customizations are implementation-dependent.
-
See Also:
-
Constant Field Values
POLICY_NOPLAINTEXT
public static final String POLICY_NOPLAINTEXT
-
The name of a property that specifies whether mechanisms susceptible to simple plain passive attacks (e.g., "PLAIN") are not permitted. The property contains
"true"
if such mechanisms are not permitted;
"false"
if such mechanisms are permitted. The default is
"false"
.
The value of this constant is
"javax.security.sasl.policy.noplaintext"
.
-
See Also:
-
Constant Field Values
POLICY_NOACTIVE
public static final String POLICY_NOACTIVE
-
The name of a property that specifies whether mechanisms susceptible to active (non-dictionary) attacks are not permitted. The property contains
"true"
if mechanisms susceptible to active attacks are not permitted;
"false"
if such mechanisms are permitted. The default is
"false"
.
The value of this constant is
"javax.security.sasl.policy.noactive"
.
-
See Also:
-
Constant Field Values
POLICY_NODICTIONARY
public static final String POLICY_NODICTIONARY
-
The name of a property that specifies whether mechanisms susceptible to passive dictionary attacks are not permitted. The property contains
"true"
if mechanisms susceptible to dictionary attacks are not permitted;
"false"
if such mechanisms are permitted. The default is
"false"
.
The value of this constant is
"javax.security.sasl.policy.nodictionary"
.
-
See Also:
-
Constant Field Values
POLICY_NOANONYMOUS
public static final String POLICY_NOANONYMOUS
-
The name of a property that specifies whether mechanisms that accept anonymous login are not permitted. The property contains
"true"
if mechanisms that accept anonymous login are not permitted;
"false"
if such mechanisms are permitted. The default is
"false"
.
The value of this constant is
"javax.security.sasl.policy.noanonymous"
.
-
See Also:
-
Constant Field Values
POLICY_FORWARD_SECRECY
public static final String POLICY_FORWARD_SECRECY
-
The name of a property that specifies whether mechanisms that implement forward secrecy between sessions are required. Forward secrecy means that breaking into one session will not automatically provide information for breaking into future sessions. The property contains
"true"
if mechanisms that implement forward secrecy between sessions are required;
"false"
if such mechanisms are not required. The default is
"false"
.
The value of this constant is
"javax.security.sasl.policy.forward"
.
-
See Also:
-
Constant Field Values
POLICY_PASS_CREDENTIALS
public static final String POLICY_PASS_CREDENTIALS
-
The name of a property that specifies whether mechanisms that pass client credentials are required. The property contains
"true"
if mechanisms that pass client credentials are required;
"false"
if such mechanisms are not required. The default is
"false"
.
The value of this constant is
"javax.security.sasl.policy.credentials"
.
-
See Also:
-
Constant Field Values
createSaslClient
public static SaslClientcreateSaslClient(String[] mechanisms,
String authorizationId,
String protocol,
String serverName,
Map
<? super
String![](../../../diffpics/oold.gif)
< ![](../../../diffpics/oold.gif)
String,?> props,
CallbackHandler cbh)
throws SaslException
-
Creates a
SaslClient
using the parameters supplied. This method uses the
JCA Security Provider Framework
, described in the "Java Cryptography Architecture API Specification & Reference", for locating and selecting a
SaslClient
implementation. First, it obtains an ordered list of
SaslClientFactory
instances from the registered security providers for the "SaslClientFactory" service and the specified SASL mechanism(s). It then invokes
createSaslClient()
on each factory instance on the list until one produces a non-null
SaslClient
instance. It returns the non-null
SaslClient
instance, or null if the search fails to produce a non-null
SaslClient
instance.
A security provider for SaslClientFactory registers with the JCA Security Provider Framework keys of the form
SaslClientFactory.mechanism_name
and values that are class names of implementations of
javax.security.sasl.SaslClientFactory
. For example, a provider that contains a factory class,
com.wiz.sasl.digest.ClientFactory
, that supports the "DIGEST-MD5" mechanism would register the following entry with the JCA:
SaslClientFactory.DIGEST-MD5 com.wiz.sasl.digest.ClientFactory
See the "Java Cryptography Architecture API Specification & Reference" for information about how to install and configure security service providers.
-
-
Parameters:
-
mechanisms - The non-null list of mechanism names to try. Each is the IANA-registered name of a SASL mechanism. (e.g. "GSSAPI", "CRAM-MD5").
-
authorizationId - The possibly null protocol-dependent identification to be used for authorization. If null or empty, the server derives an authorization ID from the client's authentication credentials. When the SASL authentication completes successfully, the specified entity is granted access.
-
protocol - The non-null string name of the protocol for which the authentication is being performed (e.g., "ldap").
-
serverName - The non-null fully-qualified host name of the server to authenticate to.
-
props - The possibly null set of properties used to select the SASL mechanism and to configure the authentication exchange of the selected mechanism. For example, if
props
contains the Sasl.POLICY_NOPLAINTEXT property with the value
"true"
, then the selected SASL mechanism must not be susceptible to simple plain passive attacks. In addition to the standard properties declared in this class, other, possibly mechanism-specific, properties can be included. Properties not relevant to the selected mechanism are ignored.
-
cbh - The possibly null callback handler to used by the SASL mechanisms to get further information from the application/library to complete the authentication. For example, a SASL mechanism might require the authentication ID, password and realm from the caller. The authentication ID is requested by using a
NameCallback
. The password is requested by using a
PasswordCallback
. The realm is requested by using a
RealmChoiceCallback
if there is a list of realms to choose from, and by using a
RealmCallback
if the realm must be entered.
-
Returns:
-
A possibly null
SaslClient
created using the parameters supplied. If null, cannot find a
SaslClientFactory
that will produce one.
-
Throws:
-
SaslException
- If cannot create a
SaslClient
because of an error.
createSaslServer
public static SaslServercreateSaslServer(String mechanism,
String protocol,
String serverName,
Map
<? super
String![](../../../diffpics/oold.gif)
< ![](../../../diffpics/oold.gif)
String,?> props,
CallbackHandler cbh)
throws SaslException
-
Creates a
SaslServer
for the specified mechanism. This method uses the
JCA Security Provider Framework
, described in the "Java Cryptography Architecture API Specification & Reference", for locating and selecting a
SaslServer
implementation. First, it obtains an ordered list of
SaslServerFactory
instances from the registered security providers for the "SaslServerFactory" service and the specified mechanism. It then invokes
createSaslServer()
on each factory instance on the list until one produces a non-null
SaslServer
instance. It returns the non-null
SaslServer
instance, or null if the search fails to produce a non-null
SaslServer
instance.
A security provider for SaslServerFactory registers with the JCA Security Provider Framework keys of the form
SaslServerFactory.mechanism_name
and values that are class names of implementations of
javax.security.sasl.SaslServerFactory
. For example, a provider that contains a factory class,
com.wiz.sasl.digest.ServerFactory
, that supports the "DIGEST-MD5" mechanism would register the following entry with the JCA:
SaslServerFactory.DIGEST-MD5 com.wiz.sasl.digest.ServerFactory
See the "Java Cryptography Architecture API Specification & Reference" for information about how to install and configure security service providers.
-
-
Parameters:
-
mechanism - The non-null mechanism name. It must be an IANA-registered name of a SASL mechanism. (e.g. "GSSAPI", "CRAM-MD5").
-
protocol - The non-null string name of the protocol for which the authentication is being performed (e.g., "ldap").
-
serverName - The non-null fully qualified host name of the server.
-
props - The possibly null set of properties used to select the SASL mechanism and to configure the authentication exchange of the selected mechanism. For example, if
props
contains the Sasl.POLICY_NOPLAINTEXT property with the value
"true"
, then the selected SASL mechanism must not be susceptible to simple plain passive attacks. In addition to the standard properties declared in this class, other, possibly mechanism-specific, properties can be included. Properties not relevant to the selected mechanism are ignored.
-
cbh - The possibly null callback handler to used by the SASL mechanisms to get further information from the application/library to complete the authentication. For example, a SASL mechanism might require the authentication ID, password and realm from the caller. The authentication ID is requested by using a
NameCallback
. The password is requested by using a
PasswordCallback
. The realm is requested by using a
RealmChoiceCallback
if there is a list of realms to choose from, and by using a
RealmCallback
if the realm must be entered.
-
Returns:
-
A possibly null
SaslServer
created using the parameters supplied. If null, cannot find a
SaslServerFactory
that will produce one.
-
Throws:
-
SaslException
- If cannot create a
SaslServer
because of an error.
getSaslClientFactories
public static Enumeration<SaslClientFactory> getSaslClientFactories()
-
Gets an enumeration of known factories for producing
SaslClient
. This method uses the same algorithm for locating factories as
createSaslClient()
.
-
-
Returns:
-
A non-null enumeration of known factories for producing
SaslClient
.
-
See Also:
-
createSaslClient(java.lang.String[], java.lang.String, java.lang.String, java.lang.String, java.util.Map super java.lang.String, ?>
, javax.security.auth.callback.CallbackHandler)
createSaslClient(java.lang.String[], java.lang.String, java.lang.String, java.lang.String, java.util.Map
, javax.security.auth.callback.CallbackHandler)
getSaslServerFactories
public static Enumeration<SaslServerFactory> getSaslServerFactories()
-
Gets an enumeration of known factories for producing
SaslServer
. This method uses the same algorithm for locating factories as
createSaslServer()
.
-
-
Returns:
-
A non-null enumeration of known factories for producing
SaslServer
.
-
See Also:
-
createSaslServer(java.lang.String, java.lang.String, java.lang.String, java.util.Map super java.lang.String, ?>
, javax.security.auth.callback.CallbackHandler)
createSaslServer(java.lang.String, java.lang.String, java.lang.String, java.util.Map
, javax.security.auth.callback.CallbackHandler)