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Added interfaces for reading and writing packets and recognising which

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contact originated an incoming connection, and an implementation of
the PacketWriter interface.
This commit is contained in:
akwizgran
2011-08-09 16:15:25 +01:00
parent 18654f1514
commit e9d0021f56
8 changed files with 351 additions and 1 deletions
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27
components/net/sf/briar/crypto/CryptoComponentImpl.java
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@@ -8,6 +8,10 @@ import java.security.NoSuchProviderException;
import java.security.Security;
import java.security.Signature;
import javax.crypto.KeyGenerator;
import javax.crypto.Mac;
import javax.crypto.SecretKey;
import net.sf.briar.api.crypto.CryptoComponent;
import net.sf.briar.api.crypto.KeyParser;
@@ -18,11 +22,15 @@ class CryptoComponentImpl implements CryptoComponent {
private static final String PROVIDER = "BC";
private static final String DIGEST_ALGO = "SHA-256";
private static final String KEY_PAIR_ALGO = "ECDSA";
private static final int KEY_PAIR_KEYSIZE = 256;
private static final int KEY_PAIR_KEYSIZE = 256; // Bits
private static final String MAC_ALGO = "HMacSHA256";
private static final String SECRET_KEY_ALGO = "AES";
private static final int SECRET_KEY_KEYSIZE = 256; // Bits
private static final String SIGNATURE_ALGO = "ECDSA";
private final KeyParser keyParser;
private final KeyPairGenerator keyPairGenerator;
private final KeyGenerator keyGenerator;
CryptoComponentImpl() {
Security.addProvider(new BouncyCastleProvider());
@@ -31,6 +39,9 @@ class CryptoComponentImpl implements CryptoComponent {
keyPairGenerator = KeyPairGenerator.getInstance(KEY_PAIR_ALGO,
PROVIDER);
keyPairGenerator.initialize(KEY_PAIR_KEYSIZE);
keyGenerator = KeyGenerator.getInstance(SECRET_KEY_ALGO,
PROVIDER);
keyGenerator.init(SECRET_KEY_KEYSIZE);
} catch(NoSuchAlgorithmException impossible) {
throw new RuntimeException(impossible);
} catch(NoSuchProviderException impossible) {
@@ -42,10 +53,24 @@ class CryptoComponentImpl implements CryptoComponent {
return keyPairGenerator.generateKeyPair();
}
public SecretKey generateSecretKey() {
return keyGenerator.generateKey();
}
public KeyParser getKeyParser() {
return keyParser;
}
public Mac getMac() {
try {
return Mac.getInstance(MAC_ALGO, PROVIDER);
} catch(NoSuchAlgorithmException impossible) {
throw new RuntimeException(impossible);
} catch(NoSuchProviderException impossible) {
throw new RuntimeException(impossible);
}
}
public MessageDigest getMessageDigest() {
try {
return MessageDigest.getInstance(DIGEST_ALGO, PROVIDER);