Example usage for org.bouncycastle.crypto.agreement.jpake JPAKERound1Payload JPAKERound1Payload

Introduction

In this page you can find the example usage for org.bouncycastle.crypto.agreement.jpake JPAKERound1Payload JPAKERound1Payload.

Prototype

public JPAKERound1Payload(String participantId, BigInteger gx1, BigInteger gx2,
            BigInteger[] knowledgeProofForX1, BigInteger[] knowledgeProofForX2) 

Source Link

Usage

From source file:com.distrimind.util.crypto.P2PJPAKESecretMessageExchanger.java

License:Open Source License

@Override
protected void receiveData(int stepNumber, byte[] dataReceived) throws CryptoException {
    valid = false;//from   www  .j ava 2 s. c o m
    switch (stepNumber) {
    case 0:
        try (ByteArrayInputStream bais = new ByteArrayInputStream(dataReceived)) {
            try (DataInputStream ois = new DataInputStream(bais)) {
                JPAKERound1Payload r1;
                try {
                    short s = ois.readShort();
                    if (s <= 0)
                        throw new IOException();
                    byte[] tab = new byte[s];
                    ois.readFully(tab);
                    BigInteger gx1 = new BigInteger(tab);

                    s = ois.readShort();
                    if (s <= 0)
                        throw new IOException();
                    tab = new byte[s];
                    ois.readFully(tab);
                    BigInteger gx2 = new BigInteger(tab);

                    int size = ois.readInt();
                    BigInteger[] knowledgeProofForX1 = null;
                    if (size > 0) {
                        if (size > 100)
                            throw new CryptoException("illegal argument exception");
                        knowledgeProofForX1 = new BigInteger[size];
                        for (int i = 0; i < size; i++) {
                            s = ois.readShort();
                            if (s <= 0)
                                throw new IOException();
                            tab = new byte[s];
                            ois.readFully(tab);
                            knowledgeProofForX1[i] = new BigInteger(tab);
                        }
                    }
                    size = ois.readInt();
                    BigInteger[] knowledgeProofForX2 = null;
                    if (size > 0) {
                        if (size > 100)
                            throw new CryptoException("illegal argument exception");
                        knowledgeProofForX2 = new BigInteger[size];
                        for (int i = 0; i < size; i++) {
                            s = ois.readShort();
                            if (s <= 0)
                                throw new IOException();
                            tab = new byte[s];
                            ois.readFully(tab);
                            knowledgeProofForX2[i] = new BigInteger(tab);
                        }
                    }
                    s = ois.readShort();
                    if (s <= 0)
                        throw new IOException();
                    tab = new byte[s];
                    ois.readFully(tab);
                    String pid = new String(tab, Charset.forName("utf-8"));
                    if (knowledgeProofForX1 == null)
                        throw new IOException();
                    if (knowledgeProofForX2 == null)
                        throw new IOException();
                    r1 = new JPAKERound1Payload(pid, gx1, gx2, knowledgeProofForX1, knowledgeProofForX2);
                } catch (Exception e) {
                    valid = false;
                    throw new CryptoException("data received is not a valid instance of JPAKERound1Payload", e);
                }
                jpake.validateRound1PayloadReceived(r1);
            }
        } catch (Exception e) {
            valid = false;
            if (e instanceof CryptoException)
                throw (CryptoException) e;
            else
                throw new CryptoException("", e);
        }
        break;
    case 1:
        try (ByteArrayInputStream bais = new ByteArrayInputStream(dataReceived)) {
            try (DataInputStream ois = new DataInputStream(bais)) {
                JPAKERound2Payload r2;
                try {
                    short s = ois.readShort();
                    if (s <= 0)
                        throw new IOException();
                    byte[] tab = new byte[s];
                    ois.readFully(tab);
                    BigInteger A = new BigInteger(tab);

                    int size = ois.readInt();
                    BigInteger[] knowledgeProofForX2s = null;
                    if (size > 0) {
                        if (size > 100)
                            throw new CryptoException("illegal argument exception");
                        knowledgeProofForX2s = new BigInteger[size];
                        for (int i = 0; i < size; i++) {
                            s = ois.readShort();
                            if (s <= 0)
                                throw new IOException();
                            tab = new byte[s];
                            ois.readFully(tab);
                            knowledgeProofForX2s[i] = new BigInteger(tab);
                        }
                    }
                    s = ois.readShort();
                    if (s <= 0)
                        throw new IOException();
                    tab = new byte[s];
                    ois.readFully(tab);
                    String pid = new String(tab, Charset.forName("utf-8"));

                    if (knowledgeProofForX2s == null)
                        throw new IOException();

                    r2 = new JPAKERound2Payload(pid, A, knowledgeProofForX2s);
                } catch (Exception e) {
                    valid = false;
                    throw new CryptoException("data received is not a valid instance of JPAKERound2Payload", e);
                }
                jpake.validateRound2PayloadReceived(r2);
            }
        } catch (Exception e) {
            valid = false;
            if (e instanceof CryptoException)
                throw (CryptoException) e;
            else
                throw new CryptoException("", e);
        }
        break;
    case 2:
        try (ByteArrayInputStream bais = new ByteArrayInputStream(dataReceived)) {
            try (DataInputStream ois = new DataInputStream(bais)) {
                JPAKERound3Payload r3;
                try {
                    short s = ois.readShort();
                    if (s <= 0)
                        throw new IOException();
                    byte[] tab = new byte[s];
                    ois.readFully(tab);
                    BigInteger magTag = new BigInteger(tab);

                    s = ois.readShort();
                    if (s <= 0)
                        throw new IOException();
                    tab = new byte[s];
                    ois.readFully(tab);
                    String pid = new String(tab, Charset.forName("utf-8"));

                    r3 = new JPAKERound3Payload(pid, magTag);
                } catch (Exception e) {
                    valid = false;
                    throw new CryptoException("data received is not a valid instance of JPAKERound2Payload", e);
                }

                jpake.validateRound3PayloadReceived(r3, keyMaterial);
            }
        } catch (Exception e) {
            valid = false;
            if (e instanceof CryptoException)
                throw (CryptoException) e;
            else
                throw new CryptoException("", e);
        }
        break;
    default:
        throw new IllegalAccessError();

    }
    valid = true;
}

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