QCA::TLSContext Class Reference

#include <QtCrypto>

Inheritance diagram for QCA::TLSContext:

Classes
class	SessionInfo

Public Types
enum	Result { Success , Error , Continue }

Signals
void	dtlsTimeout ()
void	resultsReady ()

Public Member Functions
	TLSContext (Provider *p, const QString &type)
virtual bool	canCompress () const =0
virtual bool	canSetHostName () const =0
virtual bool	certificateRequested () const =0
virtual bool	clientHelloReceived () const =0
virtual int	encoded () const =0
virtual bool	eof () const =0
virtual QString	hostName () const =0
virtual QList< CertificateInfoOrdered >	issuerList () const =0
virtual int	maxSSF () const =0
virtual CertificateChain	peerCertificateChain () const =0
virtual Validity	peerCertificateValidity () const =0
virtual void	reset ()=0
virtual Result	result () const =0
virtual bool	serverHelloReceived () const =0
virtual SessionInfo	sessionInfo () const =0
virtual void	setCertificate (const CertificateChain &cert, const PrivateKey &key)=0
virtual void	setConstraints (const QStringList &cipherSuiteList)=0
virtual void	setConstraints (int minSSF, int maxSSF)=0
virtual void	setIssuerList (const QList< CertificateInfoOrdered > &issuerList)=0
virtual void	setMTU (int size)
virtual void	setSessionId (const TLSSessionContext &id)=0
virtual void	setTrustedCertificates (const CertificateCollection &trusted)=0
virtual void	setup (bool serverMode, const QString &hostName, bool compress)=0
virtual void	shutdown ()=0
virtual void	start ()=0
virtual QStringList	supportedCipherSuites (const TLS::Version &version) const =0
virtual QByteArray	to_app ()=0
virtual QByteArray	to_net ()=0
virtual QByteArray	unprocessed ()=0
virtual void	update (const QByteArray &from_net, const QByteArray &from_app)=0
virtual bool	waitForResultsReady (int msecs)=0

Detailed Description

TLS provider.

Note

This class is part of the provider plugin interface and should not be used directly by applications. You probably want TLS instead.

Definition at line 2239 of file qcaprovider.h.

Member Enumeration Documentation

Result

enum QCA::TLSContext::Result

Result of a TLS operation.

Enumerator
Success	Operation completed.
Error	Operation failed.
Continue	More data needed to complete operation.

Definition at line 2293 of file qcaprovider.h.

Constructor & Destructor Documentation

TLSContext()

QCA::TLSContext::TLSContext ( Provider * p, const QString & type )

inline

Standard constructor.

Parameters

p	the Provider associated with this context
type	the name of the type of feature that supported by this context

Definition at line 2306 of file qcaprovider.h.

Member Function Documentation

canCompress()

virtual bool QCA::TLSContext::canCompress ( ) const

pure virtual

Returns true if the provider supports compression.

canSetHostName()

virtual bool QCA::TLSContext::canSetHostName ( ) const

pure virtual

Returns true if the provider supports server name indication.

certificateRequested()

virtual bool QCA::TLSContext::certificateRequested ( ) const

pure virtual

Returns true if the peer is requesting a certificate.

This is only valid if a handshake is in progress or completed.

clientHelloReceived()

virtual bool QCA::TLSContext::clientHelloReceived ( ) const

pure virtual

Returns true if the TLS client hello has been received.

This is only valid if a handshake is in progress or completed.

dtlsTimeout

void QCA::TLSContext::dtlsTimeout ( )

signal

Emit this to force the application to call update(), even with empty arguments.

encoded()

virtual int QCA::TLSContext::encoded ( ) const

pure virtual

Returns the number of bytes of plaintext data that is encoded inside of to_net()

eof()

virtual bool QCA::TLSContext::eof ( ) const

pure virtual

Returns true if the peer has closed the stream.

hostName()

virtual QString QCA::TLSContext::hostName ( ) const

pure virtual

Returns the host name sent by the client using server name indication (server mode only)

This is only valid if a handshake is in progress or completed.

issuerList()

virtual QList< CertificateInfoOrdered > QCA::TLSContext::issuerList ( ) const

pure virtual

Returns the issuer list sent by the server (client mode only)

This is only valid if a handshake is in progress or completed.

maxSSF()

virtual int QCA::TLSContext::maxSSF ( ) const

pure virtual

Returns the maximum SSF supported by this provider.

peerCertificateChain()

virtual CertificateChain QCA::TLSContext::peerCertificateChain ( ) const

pure virtual

Returns the peer certificate chain.

This is only valid if a handshake is completed.

peerCertificateValidity()

virtual Validity QCA::TLSContext::peerCertificateValidity ( ) const

pure virtual

Returns the QCA::Validity of the peer certificate.

This is only valid if a handshake is completed.

reset()

virtual void QCA::TLSContext::reset ( )

pure virtual

Reset the object to its initial state.

result()

virtual Result QCA::TLSContext::result ( ) const

pure virtual

Returns the result code of an operation.

resultsReady

void QCA::TLSContext::resultsReady ( )

signal

Emit this when a start() or update() operation has completed.

serverHelloReceived()

virtual bool QCA::TLSContext::serverHelloReceived ( ) const

pure virtual

Returns true if the TLS server hello has been received.

This is only valid if a handshake is in progress or completed.

sessionInfo()

virtual SessionInfo QCA::TLSContext::sessionInfo ( ) const

pure virtual

Returns information about the active TLS session.

This is only valid if a handshake is completed.

setCertificate()

virtual void QCA::TLSContext::setCertificate ( const CertificateChain & cert, const PrivateKey & key )

pure virtual

Set the local certificate.

This function may be called at any time.

Parameters

cert	the certificate and associated trust chain
key	the private key for the local certificate

setConstraints() [1/2]

virtual void QCA::TLSContext::setConstraints ( const QStringList & cipherSuiteList )

pure virtual

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.Set the constraints of the session using a cipher suite list.

This function will be called before start().

Parameters

cipherSuiteList

the list of cipher suites that may be used for this session.

See also

supportedCipherSuites

setConstraints() [2/2]

virtual void QCA::TLSContext::setConstraints ( int minSSF, int maxSSF )

pure virtual

Set the constraints of the session using SSF values.

This function will be called before start().

Parameters

minSSF	the minimum strength factor that is acceptable
maxSSF	the maximum strength factor that is acceptable

setIssuerList()

virtual void QCA::TLSContext::setIssuerList ( const QList< CertificateInfoOrdered > & issuerList )

pure virtual

Set the list of acceptable issuers.

This function may be called at any time.

This function is for server mode only.

Parameters

issuerList

the list of issuers that may be used

setMTU()

virtual void QCA::TLSContext::setMTU ( int size )

virtual

Set the maximum transmission unit size.

This function is for DTLS only.

Parameters

size	the maximum number of bytes in a datagram

setSessionId()

virtual void QCA::TLSContext::setSessionId ( const TLSSessionContext & id )

pure virtual

Set the TLS session id, for session resuming.

This function will be called before start().

Parameters

id	the session identification

setTrustedCertificates()

virtual void QCA::TLSContext::setTrustedCertificates ( const CertificateCollection & trusted )

pure virtual

Set the list of trusted certificates.

This function may be called at any time.

Parameters

trusted

the trusted certificates and CRLs to be used.

setup()

virtual void QCA::TLSContext::setup ( bool serverMode, const QString & hostName, bool compress )

pure virtual

Configure a new session.

This function will be called before any other configuration functions.

Parameters

serverMode	whether to operate as a server (true) or client (false)
hostName	the hostname to use
compress	whether to compress (true) or not (false)

shutdown()

virtual void QCA::TLSContext::shutdown ( )

pure virtual

Sets the session to the shutdown state.

The actual shutdown operation will happen at a future call to update().

This function is for normal TLS only (not DTLS).

start()

virtual void QCA::TLSContext::start ( )

pure virtual

Begins the session, starting with the handshake.

This function returns immediately, and completion is signaled with the resultsReady() signal.

On completion, the result() function will return Success if the TLS session is able to begin, or Error if there is a failure to initialize the TLS subsystem. If successful, the session is now in the handshake state, and update() will be called repeatedly until the session ends.

supportedCipherSuites()

virtual QStringList QCA::TLSContext::supportedCipherSuites ( const TLS::Version & version ) const

pure virtual

Returns a list of supported cipher suites for the specified SSL/TLS version.

The cipher suites are specified as strings, for example: "TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA" (without quotes).

Parameters

version

the version of TLS to search for

to_app()

virtual QByteArray QCA::TLSContext::to_app ( )

pure virtual

Returns data that is decoded from the network and should be processed by the application.

to_net()

virtual QByteArray QCA::TLSContext::to_net ( )

pure virtual

Returns data that should be sent across the network.

unprocessed()

virtual QByteArray QCA::TLSContext::unprocessed ( )

pure virtual

Returns any unprocessed network input data.

This is only valid after a successful shutdown.

update()

virtual void QCA::TLSContext::update ( const QByteArray & from_net, const QByteArray & from_app )

pure virtual

Performs one iteration of the TLS session processing.

This function returns immediately, and completion is signaled with the resultsReady() signal.

If the session is in a handshake state, result() and to_net() will be valid. If result() is Success, then the session is now in the connected state.

If the session is in a shutdown state, result() and to_net() will be valid. If result() is Success, then the session has ended.

If the session is in a connected state, result(), to_net(), encoded(), to_app(), and eof() are valid. The result() function will return Success or Error. Note that eof() does not apply to DTLS.

For DTLS, this function operates with single packets. Many update() operations must be performed repeatedly to exchange multiple packets.

Parameters

from_net	the data from the "other side" of the connection
from_app	the data from the application of the protocol

waitForResultsReady()

virtual bool QCA::TLSContext::waitForResultsReady ( int msecs )

pure virtual

Waits for a start() or update() operation to complete.

In this case, the resultsReady() signal is not emitted. Returns true if the operation completed or false if this function times out.

This function is blocking.

Parameters

msecs

number of milliseconds to wait (-1 to wait forever)

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The documentation for this class was generated from the following file:

• qcaprovider.h