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Summary: Ctors | Methods | Inherited Methods

# SSLParameters

`public class SSLParameters`
`extends Object` ``

java.lang.Object
↳ | javax.net.ssl.SSLParameters

Encapsulates parameters for an SSL/TLS connection. The parameters are the list of ciphersuites to be accepted in an SSL/TLS handshake, the list of protocols to be allowed, the endpoint identification algorithm during SSL/TLS handshaking, the Server Name Indication (SNI), the algorithm constraints and whether SSL/TLS servers should request or require client authentication, etc.

SSLParameters can be created via the constructors in this class. Objects can also be obtained using the `getSSLParameters()` methods in `SSLSocket#getSSLParameters` and `SSLServerSocket#getSSLParameters` and `SSLEngine#getSSLParameters` or the `SSLContext#getDefaultSSLParameters` and `SSLContext#getSupportedSSLParameters` methods in `SSLContext`.

SSLParameters can be applied to a connection via the methods `SSLSocket#setSSLParameters` and `SSLServerSocket#setSSLParameters` and `SSLEngine#setSSLParameters`.

See also:

- `SSLSocket`
- `SSLEngine`
- `SSLContext`

## Summary

### Public constructors
`SSLParameters()` Constructs SSLParameters.
`SSLParameters(String[] cipherSuites)` Constructs SSLParameters from the specified array of ciphersuites.
`SSLParameters(String[] cipherSuites, String[] protocols)` Constructs SSLParameters from the specified array of ciphersuites and protocols.

### Public methods
`AlgorithmConstraints` | `getAlgorithmConstraints()` Returns the cryptographic algorithm constraints.
`String[]` | `getApplicationProtocols()` Returns a prioritized array of application-layer protocol names that can be negotiated over the SSL/TLS protocols.
`String[]` | `getCipherSuites()` Returns a copy of the array of ciphersuites or null if none have been set.
`String` | `getEndpointIdentificationAlgorithm()` Gets the endpoint identification algorithm.
`boolean` | `getNeedClientAuth()` Returns whether client authentication should be required.
`String[]` | `getProtocols()` Returns a copy of the array of protocols or null if none have been set.
`final Collection<SNIMatcher>` | `getSNIMatchers()` Returns a `Collection` containing all `SNIMatcher`s of the Server Name Indication (SNI) parameter, or null if none has been set.
`final List<SNIServerName>` | `getServerNames()` Returns a `List` containing all `SNIServerName`s of the Server Name Indication (SNI) parameter, or null if none has been set.
`final boolean` | `getUseCipherSuitesOrder()` Returns whether the local cipher suites preference should be honored.
`boolean` | `getWantClientAuth()` Returns whether client authentication should be requested.
`void` | `setAlgorithmConstraints(AlgorithmConstraints constraints)` Sets the cryptographic algorithm constraints, which will be used in addition to any configured by the runtime environment.
`void` | `setApplicationProtocols(String[] protocols)` Sets the prioritized array of application-layer protocol names that can be negotiated over the SSL/TLS protocols.
`void` | `setCipherSuites(String[] cipherSuites)` Sets the array of ciphersuites.
`void` | `setEndpointIdentificationAlgorithm(String algorithm)` Sets the endpoint identification algorithm.
`void` | `setNeedClientAuth(boolean needClientAuth)` Sets whether client authentication should be required.
`void` | `setProtocols(String[] protocols)` Sets the array of protocols.
`final void` | `setSNIMatchers(Collection<SNIMatcher> matchers)` Sets the `SNIMatcher`s of the Server Name Indication (SNI) parameter.
`final void` | `setServerNames(List<SNIServerName> serverNames)` Sets the desired `SNIServerName`s of the Server Name Indication (SNI) parameter.
`final void` | `setUseCipherSuitesOrder(boolean honorOrder)` Sets whether the local cipher suites preference should be honored.
`void` | `setWantClientAuth(boolean wantClientAuth)` Sets whether client authentication should be requested.

### Inherited methods
From class `java.lang.Object`
`Object` | `clone()` Creates and returns a copy of this object.
`boolean` | `equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void` | `finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>` | `getClass()` Returns the runtime class of this `Object`.
`int` | `hashCode()` Returns a hash code value for the object.
`final void` | `notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void` | `notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String` | `toString()` Returns a string representation of the object.
`final void` | `wait(long timeout, int nanos)` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
`final void` | `wait(long timeout)` Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.
`final void` | `wait()` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.

## Public constructors

### SSLParameters

    public SSLParameters ()

Constructs SSLParameters.

The values of cipherSuites, protocols, cryptographic algorithm constraints, endpoint identification algorithm, server names and server name matchers are set to `null`, useCipherSuitesOrder, wantClientAuth and needClientAuth are set to `false`.

### SSLParameters

    public SSLParameters (String[] cipherSuites)

Constructs SSLParameters from the specified array of ciphersuites.

Calling this constructor is equivalent to calling the no-args constructor followed by `setCipherSuites(cipherSuites);`.

Parameters
`cipherSuites` | `String`: the array of ciphersuites (or null)

### SSLParameters

    public SSLParameters (String[] cipherSuites,
                    String[] protocols)

Constructs SSLParameters from the specified array of ciphersuites and protocols.

Calling this constructor is equivalent to calling the no-args constructor followed by `setCipherSuites(cipherSuites); setProtocols(protocols);`.

Parameters
`cipherSuites` | `String`: the array of ciphersuites (or null)
`protocols` | `String`: the array of protocols (or null)

## Public methods

### getAlgorithmConstraints

    public AlgorithmConstraints getAlgorithmConstraints ()

Returns the cryptographic algorithm constraints.

Returns
`AlgorithmConstraints` | the cryptographic algorithm constraints, or null if the constraints have not been set

See also:

- `setAlgorithmConstraints(AlgorithmConstraints)`

### getApplicationProtocols

    public String[] getApplicationProtocols ()

Returns a prioritized array of application-layer protocol names that can be negotiated over the SSL/TLS protocols.

The array could be empty (zero-length), in which case protocol indications will not be used.

This method will return a new array each time it is invoked.

Returns
`String[]` | a non-null, possibly zero-length array of application protocol `String`s. The array is ordered based on protocol preference, with `protocols[0]` being the most preferred.

See also:

- `setApplicationProtocols(String[])`

### getCipherSuites

    public String[] getCipherSuites ()

Returns a copy of the array of ciphersuites or null if none have been set.

Returns
`String[]` | a copy of the array of ciphersuites or null if none have been set.

### getEndpointIdentificationAlgorithm

    public String getEndpointIdentificationAlgorithm ()

Gets the endpoint identification algorithm.

Returns
`String` | the endpoint identification algorithm, or null if none has been set.

See also:

- `X509ExtendedTrustManager`
- `setEndpointIdentificationAlgorithm(String)`

### getNeedClientAuth

    public boolean getNeedClientAuth ()

Returns whether client authentication should be required.

Returns
`boolean` | whether client authentication should be required.

### getProtocols

    public String[] getProtocols ()

Returns a copy of the array of protocols or null if none have been set.

Returns
`String[]` | a copy of the array of protocols or null if none have been set.

### getSNIMatchers

    public final Collection<SNIMatcher> getSNIMatchers ()

Returns a `Collection` containing all `SNIMatcher`s of the Server Name Indication (SNI) parameter, or null if none has been set.

This method is only useful to `SSLSocket`s or `SSLEngine`s operating in server mode.

For better interoperability, providers generally will not define default matchers so that by default servers will ignore the SNI extension and continue the handshake.

Returns
`Collection<SNIMatcher>` | null or an immutable collection of non-null `SNIMatcher`s

See also:

- `SNIMatcher`
- `setSNIMatchers(Collection)`

### getServerNames

    public final List<SNIServerName> getServerNames ()

Returns a `List` containing all `SNIServerName`s of the Server Name Indication (SNI) parameter, or null if none has been set.

This method is only useful to `SSLSocket`s or `SSLEngine`s operating in client mode.

For SSL/TLS connections, the underlying SSL/TLS provider may specify a default value for a certain server name type. In client mode, it is recommended that, by default, providers should include the server name indication whenever the server can be located by a supported server name type.

It is recommended that providers initialize default Server Name Indications when creating `SSLSocket`/`SSLEngine`s. In the following examples, the server name could be represented by an instance of `SNIHostName` which has been initialized with the hostname "www.example.com" and type `StandardConstants#SNI_HOST_NAME`.

         Socket socket =
             sslSocketFactory.createSocket("www.example.com", 443);

or

         SSLEngine engine =
             sslContext.createSSLEngine("www.example.com", 443);

Returns
`List<SNIServerName>` | null or an immutable list of non-null `SNIServerName`s

See also:

- `List`
- `setServerNames(List)`

### getUseCipherSuitesOrder

    public final boolean getUseCipherSuitesOrder ()

Returns whether the local cipher suites preference should be honored.

Returns
`boolean` | whether local cipher suites order in `#getCipherSuites` should be honored during SSL/TLS handshaking.

See also:

- `setUseCipherSuitesOrder(boolean)`

### getWantClientAuth

    public boolean getWantClientAuth ()

Returns whether client authentication should be requested.

Returns
`boolean` | whether client authentication should be requested.

### setAlgorithmConstraints

    public void setAlgorithmConstraints (AlgorithmConstraints constraints)

Sets the cryptographic algorithm constraints, which will be used in addition to any configured by the runtime environment.

If the `constraints` parameter is non-null, every cryptographic algorithm, key and algorithm parameters used in the SSL/TLS handshake must be permitted by the constraints.

Parameters
`constraints` | `AlgorithmConstraints`: the algorithm constraints (or null)

### setApplicationProtocols

    public void setApplicationProtocols (String[] protocols)

Sets the prioritized array of application-layer protocol names that can be negotiated over the SSL/TLS protocols.

If application-layer protocols are supported by the underlying SSL/TLS implementation, this method configures which values can be negotiated by protocols such as RFC 7301 , the Application Layer Protocol Negotiation (ALPN).

If this end of the connection is expected to offer application protocol values, all protocols configured by this method will be sent to the peer.

If this end of the connection is expected to select the application protocol value, the `protocols` configured by this method are compared with those sent by the peer. The first matched value becomes the negotiated value. If none of the `protocols` were actually requested by the peer, the underlying protocol will determine what action to take. (For example, ALPN will send a `"no_application_protocol"` alert and terminate the connection.)

##### Implementation Requirements:

- This method will make a copy of the `protocols` array.

Parameters
`protocols` | `String`: an ordered array of application protocols, with `protocols[0]` being the most preferred. If the array is empty (zero-length), protocol indications will not be used.

Throws
`IllegalArgumentException` | if protocols is null, or if any element in a non-empty array is null or an empty (zero-length) string

See also:

- `getApplicationProtocols()`

### setCipherSuites

    public void setCipherSuites (String[] cipherSuites)

Sets the array of ciphersuites.

Parameters
`cipherSuites` | `String`: the array of ciphersuites (or null)

### setEndpointIdentificationAlgorithm

    public void setEndpointIdentificationAlgorithm (String algorithm)

Sets the endpoint identification algorithm.

If the `algorithm` parameter is non-null or non-empty, the endpoint identification/verification procedures must be handled during SSL/TLS handshaking. This is to prevent man-in-the-middle attacks.

Parameters
`algorithm` | `String`: The standard string name of the endpoint identification algorithm (or null). See Appendix A in the Java Cryptography Architecture API Specification & Reference for information about standard algorithm names.

See also:

- `X509ExtendedTrustManager`

### setNeedClientAuth

    public void setNeedClientAuth (boolean needClientAuth)

Sets whether client authentication should be required. Calling this method clears the `wantClientAuth` flag.

Parameters
`needClientAuth` | `boolean`: whether client authentication should be required

### setProtocols

    public void setProtocols (String[] protocols)

Sets the array of protocols.

Parameters
`protocols` | `String`: the array of protocols (or null)

### setSNIMatchers

    public final void setSNIMatchers (Collection<SNIMatcher> matchers)

Sets the `SNIMatcher`s of the Server Name Indication (SNI) parameter.

This method is only useful to `SSLSocket`s or `SSLEngine`s operating in server mode.

Note that the `matchers` collection is cloned to protect against subsequent modification.

Parameters
`matchers` | `Collection`: the collection of `SNIMatcher`s (or null)

Throws
`NullPointerException` | if the `matchers` contains `null` element
`IllegalArgumentException` | if the `matchers` contains more than one name of the same name type

See also:

- `Collection`
- `SNIMatcher`
- `getSNIMatchers()`

### setServerNames

    public final void setServerNames (List<SNIServerName> serverNames)

Sets the desired `SNIServerName`s of the Server Name Indication (SNI) parameter.

This method is only useful to `SSLSocket`s or `SSLEngine`s operating in client mode.

Note that the `serverNames` list is cloned to protect against subsequent modification.

Parameters
`serverNames` | `List`: the list of desired `SNIServerName`s (or null)

Throws
`NullPointerException` | if the `serverNames` contains `null` element
`IllegalArgumentException` | if the `serverNames` contains more than one name of the same name type

See also:

- `SNIServerName`
- `getServerNames()`

### setUseCipherSuitesOrder

    public final void setUseCipherSuitesOrder (boolean honorOrder)

Sets whether the local cipher suites preference should be honored.

Parameters
`honorOrder` | `boolean`: whether local cipher suites order in `#getCipherSuites` should be honored during SSL/TLS handshaking.

See also:

- `getUseCipherSuitesOrder()`

### setWantClientAuth

    public void setWantClientAuth (boolean wantClientAuth)

Sets whether client authentication should be requested. Calling this method clears the `needClientAuth` flag.

Parameters
`wantClientAuth` | `boolean`: whether client authentication should be requested

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