- java.lang.Object
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- javax.net.ssl.SSLContext
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public class SSLContext extends Object
Instances of this class represent a secure socket protocol implementation which acts as a factory for secure socket factories orSSLEngine
s. This class is initialized with an optional set of key and trust managers and source of secure random bytes.Every implementation of the Java platform is required to support the following standard
SSLContext
protocol:- TLSv1
- Since:
- 1.4
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Constructor Summary
Constructors Modifier Constructor and Description protected
SSLContext(SSLContextSpi contextSpi, Provider provider, String protocol)
Creates an SSLContext object.
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Method Summary
Methods Modifier and Type Method and Description SSLEngine
createSSLEngine()
Creates a newSSLEngine
using this context.SSLEngine
createSSLEngine(String peerHost, int peerPort)
Creates a newSSLEngine
using this context using advisory peer information.SSLSessionContext
getClientSessionContext()
Returns the client session context, which represents the set of SSL sessions available for use during the handshake phase of client-side SSL sockets.static SSLContext
getDefault()
Returns the default SSL context.SSLParameters
getDefaultSSLParameters()
Returns a copy of the SSLParameters indicating the default settings for this SSL context.static SSLContext
getInstance(String protocol)
Returns aSSLContext
object that implements the specified secure socket protocol.static SSLContext
getInstance(String protocol, Provider provider)
Returns aSSLContext
object that implements the specified secure socket protocol.static SSLContext
getInstance(String protocol, String provider)
Returns aSSLContext
object that implements the specified secure socket protocol.String
getProtocol()
Returns the protocol name of thisSSLContext
object.Provider
getProvider()
Returns the provider of thisSSLContext
object.SSLSessionContext
getServerSessionContext()
Returns the server session context, which represents the set of SSL sessions available for use during the handshake phase of server-side SSL sockets.SSLServerSocketFactory
getServerSocketFactory()
Returns aServerSocketFactory
object for this context.SSLSocketFactory
getSocketFactory()
Returns aSocketFactory
object for this context.SSLParameters
getSupportedSSLParameters()
Returns a copy of the SSLParameters indicating the supported settings for this SSL context.void
init(KeyManager[] km, TrustManager[] tm, SecureRandom random)
Initializes this context.static void
setDefault(SSLContext context)
Sets the default SSL context.
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-
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Constructor Detail
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SSLContext
protected SSLContext(SSLContextSpi contextSpi, Provider provider, String protocol)
Creates an SSLContext object.- Parameters:
contextSpi
- the delegateprovider
- the providerprotocol
- the protocol
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Method Detail
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getDefault
public static SSLContext getDefault() throws NoSuchAlgorithmException
Returns the default SSL context.If a default context was set using the
SSLContext.setDefault()
method, it is returned. Otherwise, the first call of this method triggers the callSSLContext.getInstance("Default")
. If successful, that object is made the default SSL context and returned.The default context is immediately usable and does not require initialization.
- Returns:
- the default SSL context
- Throws:
NoSuchAlgorithmException
- if theSSLContext.getInstance()
call fails- Since:
- 1.6
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setDefault
public static void setDefault(SSLContext context)
Sets the default SSL context. It will be returned by subsequent calls togetDefault()
. The default context must be immediately usable and not require initialization.- Parameters:
context
- the SSLContext- Throws:
NullPointerException
- if context is nullSecurityException
- if a security manager exists and itscheckPermission
method does not allowSSLPermission("setDefaultSSLContext")
- Since:
- 1.6
-
getInstance
public static SSLContext getInstance(String protocol) throws NoSuchAlgorithmException
Returns aSSLContext
object that implements the specified secure socket protocol.This method traverses the list of registered security Providers, starting with the most preferred Provider. A new SSLContext object encapsulating the SSLContextSpi implementation from the first Provider that supports the specified protocol is returned.
Note that the list of registered providers may be retrieved via the
Security.getProviders()
method.- Parameters:
protocol
- the standard name of the requested protocol. See the SSLContext section in the Java Cryptography Architecture Standard Algorithm Name Documentation for information about standard protocol names.- Returns:
- the new
SSLContext
object. - Throws:
NoSuchAlgorithmException
- if no Provider supports a TrustManagerFactorySpi implementation for the specified protocol.NullPointerException
- if protocol is null.- See Also:
Provider
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getInstance
public static SSLContext getInstance(String protocol, String provider) throws NoSuchAlgorithmException, NoSuchProviderException
Returns aSSLContext
object that implements the specified secure socket protocol.A new SSLContext object encapsulating the SSLContextSpi implementation from the specified provider is returned. The specified provider must be registered in the security provider list.
Note that the list of registered providers may be retrieved via the
Security.getProviders()
method.- Parameters:
protocol
- the standard name of the requested protocol. See the SSLContext section in the Java Cryptography Architecture Standard Algorithm Name Documentation for information about standard protocol names.provider
- the name of the provider.- Returns:
- the new
SSLContext
object. - Throws:
NoSuchAlgorithmException
- if a SSLContextSpi implementation for the specified protocol is not available from the specified provider.NoSuchProviderException
- if the specified provider is not registered in the security provider list.IllegalArgumentException
- if the provider name is null or empty.NullPointerException
- if protocol is null.- See Also:
Provider
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getInstance
public static SSLContext getInstance(String protocol, Provider provider) throws NoSuchAlgorithmException
Returns aSSLContext
object that implements the specified secure socket protocol.A new SSLContext object encapsulating the SSLContextSpi implementation from the specified Provider object is returned. Note that the specified Provider object does not have to be registered in the provider list.
- Parameters:
protocol
- the standard name of the requested protocol. See the SSLContext section in the Java Cryptography Architecture Standard Algorithm Name Documentation for information about standard protocol names.provider
- an instance of the provider.- Returns:
- the new
SSLContext
object. - Throws:
NoSuchAlgorithmException
- if a KeyManagerFactorySpi implementation for the specified protocol is not available from the specified Provider object.IllegalArgumentException
- if the provider name is null.NullPointerException
- if protocol is null.- See Also:
Provider
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getProtocol
public final String getProtocol()
Returns the protocol name of thisSSLContext
object.This is the same name that was specified in one of the
getInstance
calls that created thisSSLContext
object.- Returns:
- the protocol name of this
SSLContext
object.
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getProvider
public final Provider getProvider()
Returns the provider of thisSSLContext
object.- Returns:
- the provider of this
SSLContext
object
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init
public final void init(KeyManager[] km, TrustManager[] tm, SecureRandom random) throws KeyManagementException
Initializes this context. Either of the first two parameters may be null in which case the installed security providers will be searched for the highest priority implementation of the appropriate factory. Likewise, the secure random parameter may be null in which case the default implementation will be used.Only the first instance of a particular key and/or trust manager implementation type in the array is used. (For example, only the first javax.net.ssl.X509KeyManager in the array will be used.)
- Parameters:
km
- the sources of authentication keys or nulltm
- the sources of peer authentication trust decisions or nullrandom
- the source of randomness for this generator or null- Throws:
KeyManagementException
- if this operation fails
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getSocketFactory
public final SSLSocketFactory getSocketFactory()
Returns aSocketFactory
object for this context.- Returns:
- the
SocketFactory
object - Throws:
IllegalStateException
- if the SSLContextImpl requires initialization and theinit()
has not been called
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getServerSocketFactory
public final SSLServerSocketFactory getServerSocketFactory()
Returns aServerSocketFactory
object for this context.- Returns:
- the
ServerSocketFactory
object - Throws:
IllegalStateException
- if the SSLContextImpl requires initialization and theinit()
has not been called
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createSSLEngine
public final SSLEngine createSSLEngine()
Creates a newSSLEngine
using this context.Applications using this factory method are providing no hints for an internal session reuse strategy. If hints are desired,
createSSLEngine(String, int)
should be used instead.Some cipher suites (such as Kerberos) require remote hostname information, in which case this factory method should not be used.
- Returns:
- the
SSLEngine
object - Throws:
UnsupportedOperationException
- if the underlying provider does not implement the operation.IllegalStateException
- if the SSLContextImpl requires initialization and theinit()
has not been called- Since:
- 1.5
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createSSLEngine
public final SSLEngine createSSLEngine(String peerHost, int peerPort)
Creates a newSSLEngine
using this context using advisory peer information.Applications using this factory method are providing hints for an internal session reuse strategy.
Some cipher suites (such as Kerberos) require remote hostname information, in which case peerHost needs to be specified.
- Parameters:
peerHost
- the non-authoritative name of the hostpeerPort
- the non-authoritative port- Returns:
- the new
SSLEngine
object - Throws:
UnsupportedOperationException
- if the underlying provider does not implement the operation.IllegalStateException
- if the SSLContextImpl requires initialization and theinit()
has not been called- Since:
- 1.5
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getServerSessionContext
public final SSLSessionContext getServerSessionContext()
Returns the server session context, which represents the set of SSL sessions available for use during the handshake phase of server-side SSL sockets.This context may be unavailable in some environments, in which case this method returns null. For example, when the underlying SSL provider does not provide an implementation of SSLSessionContext interface, this method returns null. A non-null session context is returned otherwise.
- Returns:
- server session context bound to this SSL context
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getClientSessionContext
public final SSLSessionContext getClientSessionContext()
Returns the client session context, which represents the set of SSL sessions available for use during the handshake phase of client-side SSL sockets.This context may be unavailable in some environments, in which case this method returns null. For example, when the underlying SSL provider does not provide an implementation of SSLSessionContext interface, this method returns null. A non-null session context is returned otherwise.
- Returns:
- client session context bound to this SSL context
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getDefaultSSLParameters
public final SSLParameters getDefaultSSLParameters()
Returns a copy of the SSLParameters indicating the default settings for this SSL context.The parameters will always have the ciphersuites and protocols arrays set to non-null values.
- Returns:
- a copy of the SSLParameters object with the default settings
- Throws:
UnsupportedOperationException
- if the default SSL parameters could not be obtained.- Since:
- 1.6
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getSupportedSSLParameters
public final SSLParameters getSupportedSSLParameters()
Returns a copy of the SSLParameters indicating the supported settings for this SSL context.The parameters will always have the ciphersuites and protocols arrays set to non-null values.
- Returns:
- a copy of the SSLParameters object with the supported settings
- Throws:
UnsupportedOperationException
- if the supported SSL parameters could not be obtained.- Since:
- 1.6
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