Example usage for org.bouncycastle.crypto.macs SkeinMac SkeinMac

Introduction

In this page you can find the example usage for org.bouncycastle.crypto.macs SkeinMac SkeinMac.

Prototype

SkeinMac

Source Link

Usage

From source file:net.java.sip.communicator.impl.neomedia.transform.srtp.SRTCPCryptoContext.java

License:LGPL

/**
 * Construct a normal SRTPCryptoContext based on the given parameters.
 * /*from   www  .j  a  v a  2  s.c  o  m*/
 * @param ssrc
 *            the RTP SSRC that this SRTP cryptographic context protects.
 * @param masterKey
 *            byte array holding the master key for this SRTP cryptographic
 *            context. Refer to chapter 3.2.1 of the RFC about the role of
 *            the master key.
 * @param masterSalt
 *            byte array holding the master salt for this SRTP cryptographic
 *            context. It is used to computer the initialization vector that
 *            in turn is input to compute the session key, session
 *            authentication key and the session salt.
 * @param policy
 *            SRTP policy for this SRTP cryptographic context, defined the
 *            encryption algorithm, the authentication algorithm, etc
 */
@SuppressWarnings("fallthrough")
public SRTCPCryptoContext(long ssrcIn, byte[] masterK, byte[] masterS, SRTPPolicy policyIn) {
    ssrcCtx = ssrcIn;
    mki = null;

    policy = policyIn;

    masterKey = new byte[policy.getEncKeyLength()];
    System.arraycopy(masterK, 0, masterKey, 0, policy.getEncKeyLength());

    masterSalt = new byte[policy.getSaltKeyLength()];
    System.arraycopy(masterS, 0, masterSalt, 0, policy.getSaltKeyLength());

    switch (policy.getEncType()) {
    case SRTPPolicy.NULL_ENCRYPTION:
        encKey = null;
        saltKey = null;
        break;

    case SRTPPolicy.AESF8_ENCRYPTION:
        cipherF8 = new AESFastEngine();

    case SRTPPolicy.AESCM_ENCRYPTION:
        cipher = new AESFastEngine();
        encKey = new byte[this.policy.getEncKeyLength()];
        saltKey = new byte[this.policy.getSaltKeyLength()];
        break;

    case SRTPPolicy.TWOFISHF8_ENCRYPTION:
        cipherF8 = new TwofishEngine();

    case SRTPPolicy.TWOFISH_ENCRYPTION:
        cipher = new TwofishEngine();
        encKey = new byte[this.policy.getEncKeyLength()];
        saltKey = new byte[this.policy.getSaltKeyLength()];
        break;
    }

    switch (policy.getAuthType()) {
    case SRTPPolicy.NULL_AUTHENTICATION:
        authKey = null;
        tagStore = null;
        break;

    case SRTPPolicy.HMACSHA1_AUTHENTICATION:
        mac = new HMac(new SHA1Digest());
        authKey = new byte[policy.getAuthKeyLength()];
        tagStore = new byte[mac.getMacSize()];
        break;

    case SRTPPolicy.SKEIN_AUTHENTICATION:
        mac = new SkeinMac();
        authKey = new byte[policy.getAuthKeyLength()];
        tagStore = new byte[policy.getAuthTagLength()];
        break;

    default:
        tagStore = null;
    }
}

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From source file:net.java.sip.communicator.impl.neomedia.transform.srtp.SRTPCryptoContext.java

License:LGPL

/**
 * Construct a normal SRTPCryptoContext based on the given parameters.
 *
 * @param ssrcIn/*from ww  w . j ava2s  .  co  m*/
 *            the RTP SSRC that this SRTP cryptographic context protects.
 * @param rocIn
 *            the initial Roll-Over-Counter according to RFC 3711. These are
 *            the upper 32 bit of the overall 48 bit SRTP packet index.
 *            Refer to chapter 3.2.1 of the RFC.
 * @param kdr
 *            the key derivation rate defines when to recompute the SRTP
 *            session keys. Refer to chapter 4.3.1 in the RFC.
 * @param masterK
 *            byte array holding the master key for this SRTP cryptographic
 *            context. Refer to chapter 3.2.1 of the RFC about the role of
 *            the master key.
 * @param masterS
 *            byte array holding the master salt for this SRTP cryptographic
 *            context. It is used to computer the initialization vector that
 *            in turn is input to compute the session key, session
 *            authentication key and the session salt.
 * @param policyIn
 *            SRTP policy for this SRTP cryptographic context, defined the
 *            encryption algorithm, the authentication algorithm, etc
 */
@SuppressWarnings("fallthrough")
public SRTPCryptoContext(long ssrcIn, int rocIn, long kdr, byte[] masterK, byte[] masterS,
        SRTPPolicy policyIn) {
    ssrcCtx = ssrcIn;
    mki = null;
    roc = rocIn;
    guessedROC = 0;
    seqNum = 0;
    keyDerivationRate = kdr;
    seqNumSet = false;

    policy = policyIn;

    masterKey = new byte[policy.getEncKeyLength()];
    System.arraycopy(masterK, 0, masterKey, 0, policy.getEncKeyLength());

    masterSalt = new byte[policy.getSaltKeyLength()];
    System.arraycopy(masterS, 0, masterSalt, 0, policy.getSaltKeyLength());

    mac = new HMac(new SHA1Digest());

    switch (policy.getEncType()) {
    case SRTPPolicy.NULL_ENCRYPTION:
        encKey = null;
        saltKey = null;
        break;

    case SRTPPolicy.AESF8_ENCRYPTION:
        cipherF8 = new AESFastEngine();
        //$FALL-THROUGH$

    case SRTPPolicy.AESCM_ENCRYPTION:
        cipher = new AESFastEngine();
        encKey = new byte[policy.getEncKeyLength()];
        saltKey = new byte[policy.getSaltKeyLength()];
        break;

    case SRTPPolicy.TWOFISHF8_ENCRYPTION:
        cipherF8 = new TwofishEngine();

    case SRTPPolicy.TWOFISH_ENCRYPTION:
        cipher = new TwofishEngine();
        encKey = new byte[this.policy.getEncKeyLength()];
        saltKey = new byte[this.policy.getSaltKeyLength()];
        break;
    }

    switch (policy.getAuthType()) {
    case SRTPPolicy.NULL_AUTHENTICATION:
        authKey = null;
        tagStore = null;
        break;

    case SRTPPolicy.HMACSHA1_AUTHENTICATION:
        mac = new HMac(new SHA1Digest());
        authKey = new byte[policy.getAuthKeyLength()];
        tagStore = new byte[mac.getMacSize()];
        break;

    case SRTPPolicy.SKEIN_AUTHENTICATION:
        mac = new SkeinMac();
        authKey = new byte[policy.getAuthKeyLength()];
        tagStore = new byte[policy.getAuthTagLength()];
        break;

    default:
        tagStore = null;
    }
}

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