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Commit 189e34da authored by Ingo Bauersachs's avatar Ingo Bauersachs
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Fix a spelling mistake

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src/org/jitsi/impl/neomedia/transform/sdes/SDesControlImpl.java
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/*
* Jitsi, the OpenSource Java VoIP and Instant Messaging client.
*
* Distributable under LGPL license.
* See terms of license at gnu.org.
*/
package org.jitsi.impl.neomedia.transform.sdes;
import gnu.java.zrtp.utils.*;
import java.util.*;
import org.jitsi.impl.neomedia.*;
import org.jitsi.service.neomedia.*;
import org.jitsi.service.neomedia.event.*;
import ch.imvs.sdes4j.srtp.*;
/**
* Default implementation of {@link SDesControl} that supports the crypto suites
* of the original RFC4568 and the KDR parameter, but nothing else.
*
* @author Ingo Bauersachs
*/
public class SDesControlImpl
extends AbstractSrtpControl<SDesTransformEngine>
implements SDesControl
{
/**
* List of enabled crypto suites.
*/
private final List<String> enabledCryptoSuites = new ArrayList<String>(3);
/**
* List of supported crypto suites.
*/
private final List<String> supportedCryptoSuites = new ArrayList<String>(3);
private SrtpCryptoAttribute[] attributes;
private SrtpSDesFactory sdesFactory;
private SrtpCryptoAttribute selectedInAttribute;
private SrtpCryptoAttribute selectedOutAttribute;
/**
* SDESControl
*/
public SDesControlImpl()
{
super(SrtpControlType.SDES);
{
enabledCryptoSuites.add(SrtpCryptoSuite.AES_CM_128_HMAC_SHA1_80);
enabledCryptoSuites.add(SrtpCryptoSuite.AES_CM_128_HMAC_SHA1_32);
enabledCryptoSuites.add(SrtpCryptoSuite.F8_128_HMAC_SHA1_80);
}
{
supportedCryptoSuites.add(SrtpCryptoSuite.AES_CM_128_HMAC_SHA1_80);
supportedCryptoSuites.add(SrtpCryptoSuite.AES_CM_128_HMAC_SHA1_32);
supportedCryptoSuites.add(SrtpCryptoSuite.F8_128_HMAC_SHA1_80);
}
sdesFactory = new SrtpSDesFactory();
sdesFactory.setRandomGenerator(
new Random()
{
private static final long serialVersionUID = 0L;
@Override
public void nextBytes(byte[] bytes)
{
ZrtpFortuna.getInstance().getFortuna().nextBytes(bytes);
}
});
}
public SrtpCryptoAttribute getInAttribute()
{
return selectedInAttribute;
}
/**
* Returns the crypto attributes enabled on this computer.
*
* @return The crypto attributes enabled on this computer.
*/
public SrtpCryptoAttribute[] getInitiatorCryptoAttributes()
{
initAttributes();
return attributes;
}
public SrtpCryptoAttribute getOutAttribute()
{
return selectedOutAttribute;
}
public boolean getSecureCommunicationStatus()
{
return transformEngine != null;
}
public Iterable<String> getSupportedCryptoSuites()
{
return Collections.unmodifiableList(supportedCryptoSuites);
}
/**
* Initializes a new <tt>SDesTransformEngine</tt> instance to be associated
* with and used by this <tt>SDesControlImpl</tt> instance.
*
* @return a new <tt>SDesTransformEngine</tt> instance to be associated with
* and used by this <tt>SDesControlImpl</tt> instance
* @see AbstractSrtpControl#createTransformEngine()
*/
protected SDesTransformEngine createTransformEngine()
{
return
new SDesTransformEngine(selectedInAttribute, selectedOutAttribute);
}
/**
* Initializes the available SRTP crypto attributes containing: he
* crypto-suite, the key-param and the session-param.
*/
private void initAttributes()
{
if(attributes == null)
{
attributes = new SrtpCryptoAttribute[enabledCryptoSuites.size()];
for (int i = 0; i < attributes.length; i++)
{
attributes[i]
= sdesFactory.createCryptoAttribute(
i + 1,
enabledCryptoSuites.get(i));
}
}
}
/**
* Select the local crypto attribute from the initial offering (@see
* {@link #getInitiatorCryptoAttributes()}) based on the peer's first
* matching cipher suite.
*
* @param peerAttributes The peer's crypto offers.
* @return A SrtpCryptoAttribute when a matching cipher suite was found;
* <tt>null</tt>, otherwise.
*/
public SrtpCryptoAttribute initiatorSelectAttribute(
Iterable<SrtpCryptoAttribute> peerAttributes)
{
for (SrtpCryptoAttribute peerCA : peerAttributes)
{
for (SrtpCryptoAttribute localCA : attributes)
{
if (localCA.getCryptoSuite().equals(peerCA.getCryptoSuite()))
{
selectedInAttribute = peerCA;
selectedOutAttribute = localCA;
return peerCA;
}
}
}
return null;
}
/**
* Returns <tt>true</tt>, SDES always requires the secure transport of its
* keys.
*
* @return <tt>true</tt>
*/
public boolean requiresSecureSignalingTransport()
{
return true;
}
/**
* Chooses a supported crypto attribute from the peer's list of supplied
* attributes and creates the local crypto attribute. Used when the control
* is running in the role as responder.
*
* @param peerAttributes The peer's crypto attribute offering.
* @return The local crypto attribute for the answer of the offer or
* <tt>null</tt> if no matching cipher suite could be found.
*/
public SrtpCryptoAttribute responderSelectAttribute(
Iterable<SrtpCryptoAttribute> peerAttributes)
{
for (SrtpCryptoAttribute ea : peerAttributes)
{
for (String suite : enabledCryptoSuites)
{
if (suite.equals(ea.getCryptoSuite().encode()))
{
selectedInAttribute = ea;
selectedOutAttribute
= sdesFactory.createCryptoAttribute(1, suite);
return selectedOutAttribute;
}
}
}
return null;
}
/**
* {@inheritDoc}
*
* The implementation of <tt>SDesControlImpl</tt> does nothing because
* <tt>SDesControlImpl</tt> does not utilize the <tt>RTPConnector</tt>.
*/
public void setConnector(AbstractRTPConnector connector)
{
}
public void setEnabledCiphers(Iterable<String> ciphers)
{
enabledCryptoSuites.clear();
for(String c : ciphers)
enabledCryptoSuites.add(c);
}
public void start(MediaType mediaType)
{
SrtpListener srtpListener = getSrtpListener();
// in srtp the started and security event is one after another in some
// other security mechanisms (e.g. zrtp) there can be started and no
// security one or security timeout event
srtpListener.securityNegotiationStarted(mediaType, this);
srtpListener.securityTurnedOn(
mediaType,
selectedInAttribute.getCryptoSuite().encode(),
this);
}
}
/*
* Jitsi, the OpenSource Java VoIP and Instant Messaging client.
*
* Distributable under LGPL license.
* See terms of license at gnu.org.
*/
package org.jitsi.impl.neomedia.transform.sdes;
import gnu.java.zrtp.utils.*;
import java.util.*;
import org.jitsi.impl.neomedia.*;
import org.jitsi.service.neomedia.*;
import org.jitsi.service.neomedia.event.*;
import ch.imvs.sdes4j.srtp.*;
/**
* Default implementation of {@link SDesControl} that supports the crypto suites
* of the original RFC4568 and the KDR parameter, but nothing else.
*
* @author Ingo Bauersachs
*/
public class SDesControlImpl
extends AbstractSrtpControl<SDesTransformEngine>
implements SDesControl
{
/**
* List of enabled crypto suites.
*/
private final List<String> enabledCryptoSuites = new ArrayList<String>(3);
/**
* List of supported crypto suites.
*/
private final List<String> supportedCryptoSuites = new ArrayList<String>(3);
private SrtpCryptoAttribute[] attributes;
private SrtpSDesFactory sdesFactory;
private SrtpCryptoAttribute selectedInAttribute;
private SrtpCryptoAttribute selectedOutAttribute;
/**
* SDESControl
*/
public SDesControlImpl()
{
super(SrtpControlType.SDES);
{
enabledCryptoSuites.add(SrtpCryptoSuite.AES_CM_128_HMAC_SHA1_80);
enabledCryptoSuites.add(SrtpCryptoSuite.AES_CM_128_HMAC_SHA1_32);
enabledCryptoSuites.add(SrtpCryptoSuite.F8_128_HMAC_SHA1_80);
}
{
supportedCryptoSuites.add(SrtpCryptoSuite.AES_CM_128_HMAC_SHA1_80);
supportedCryptoSuites.add(SrtpCryptoSuite.AES_CM_128_HMAC_SHA1_32);
supportedCryptoSuites.add(SrtpCryptoSuite.F8_128_HMAC_SHA1_80);
}
sdesFactory = new SrtpSDesFactory();
sdesFactory.setRandomGenerator(
new Random()
{
private static final long serialVersionUID = 0L;
@Override
public void nextBytes(byte[] bytes)
{
ZrtpFortuna.getInstance().getFortuna().nextBytes(bytes);
}
});
}
public SrtpCryptoAttribute getInAttribute()
{
return selectedInAttribute;
}
/**
* Returns the crypto attributes enabled on this computer.
*
* @return The crypto attributes enabled on this computer.
*/
public SrtpCryptoAttribute[] getInitiatorCryptoAttributes()
{
initAttributes();
return attributes;
}
public SrtpCryptoAttribute getOutAttribute()
{
return selectedOutAttribute;
}
public boolean getSecureCommunicationStatus()
{
return transformEngine != null;
}
public Iterable<String> getSupportedCryptoSuites()
{
return Collections.unmodifiableList(supportedCryptoSuites);
}
/**
* Initializes a new <tt>SDesTransformEngine</tt> instance to be associated
* with and used by this <tt>SDesControlImpl</tt> instance.
*
* @return a new <tt>SDesTransformEngine</tt> instance to be associated with
* and used by this <tt>SDesControlImpl</tt> instance
* @see AbstractSrtpControl#createTransformEngine()
*/
protected SDesTransformEngine createTransformEngine()
{
return
new SDesTransformEngine(selectedInAttribute, selectedOutAttribute);
}
/**
* Initializes the available SRTP crypto attributes containing: the
* crypto-suite, the key-param and the session-param.
*/
private void initAttributes()
{
if(attributes == null)
{
attributes = new SrtpCryptoAttribute[enabledCryptoSuites.size()];
for (int i = 0; i < attributes.length; i++)
{
attributes[i]
= sdesFactory.createCryptoAttribute(
i + 1,
enabledCryptoSuites.get(i));
}
}
}
/**
* Select the local crypto attribute from the initial offering (@see
* {@link #getInitiatorCryptoAttributes()}) based on the peer's first
* matching cipher suite.
*
* @param peerAttributes The peer's crypto offers.
* @return A SrtpCryptoAttribute when a matching cipher suite was found;
* <tt>null</tt>, otherwise.
*/
public SrtpCryptoAttribute initiatorSelectAttribute(
Iterable<SrtpCryptoAttribute> peerAttributes)
{
for (SrtpCryptoAttribute peerCA : peerAttributes)
{
for (SrtpCryptoAttribute localCA : attributes)
{
if (localCA.getCryptoSuite().equals(peerCA.getCryptoSuite()))
{
selectedInAttribute = peerCA;
selectedOutAttribute = localCA;
return peerCA;
}
}
}
return null;
}
/**
* Returns <tt>true</tt>, SDES always requires the secure transport of its
* keys.
*
* @return <tt>true</tt>
*/
public boolean requiresSecureSignalingTransport()
{
return true;
}
/**
* Chooses a supported crypto attribute from the peer's list of supplied
* attributes and creates the local crypto attribute. Used when the control
* is running in the role as responder.
*
* @param peerAttributes The peer's crypto attribute offering.
* @return The local crypto attribute for the answer of the offer or
* <tt>null</tt> if no matching cipher suite could be found.
*/
public SrtpCryptoAttribute responderSelectAttribute(
Iterable<SrtpCryptoAttribute> peerAttributes)
{
for (SrtpCryptoAttribute ea : peerAttributes)
{
for (String suite : enabledCryptoSuites)
{
if (suite.equals(ea.getCryptoSuite().encode()))
{
selectedInAttribute = ea;
selectedOutAttribute
= sdesFactory.createCryptoAttribute(1, suite);
return selectedOutAttribute;
}
}
}
return null;
}
/**
* {@inheritDoc}
*
* The implementation of <tt>SDesControlImpl</tt> does nothing because
* <tt>SDesControlImpl</tt> does not utilize the <tt>RTPConnector</tt>.
*/
public void setConnector(AbstractRTPConnector connector)
{
}
public void setEnabledCiphers(Iterable<String> ciphers)
{
enabledCryptoSuites.clear();
for(String c : ciphers)
enabledCryptoSuites.add(c);
}
public void start(MediaType mediaType)
{
SrtpListener srtpListener = getSrtpListener();
// in srtp the started and security event is one after another in some
// other security mechanisms (e.g. zrtp) there can be started and no
// security one or security timeout event
srtpListener.securityNegotiationStarted(mediaType, this);
srtpListener.securityTurnedOn(
mediaType,
selectedInAttribute.getCryptoSuite().encode(),
this);
}
}
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