Some code for deterministic addresses - needs tests

core/src/main/java/ch/dissem/bitmessage/BitmessageContext.java

@@ -31,6 +31,7 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import java.net.InetAddress;
+import java.util.List;
 import java.util.Timer;
 import java.util.TimerTask;
 import java.util.concurrent.*;
@@ -128,6 +129,18 @@ public class BitmessageContext {
         return chan;
     }
 
+    public List<BitmessageAddress> createDeterministicAddresses(
+            String passphrase, int numberOfAddresses, int version, int stream, boolean shorter) {
+        List<BitmessageAddress> result = BitmessageAddress.deterministic(
+                passphrase, numberOfAddresses, version, stream, shorter);
+        for (int i = 0; i < result.size(); i++) {
+            BitmessageAddress address = result.get(i);
+            address.setAlias(passphrase + " (" + (i + 1) + ")");
+            ctx.getAddressRepository().save(address);
+        }
+        return result;
+    }
+
     public void broadcast(final BitmessageAddress from, final String subject, final String message) {
         Plaintext msg = new Plaintext.Builder(BROADCAST)
                 .from(from)

core/src/main/java/ch/dissem/bitmessage/entity/BitmessageAddress.java

@@ -29,7 +29,9 @@ import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.io.Serializable;
+import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.List;
 import java.util.Objects;
 
 import static ch.dissem.bitmessage.utils.Decode.bytes;
@@ -41,6 +43,8 @@ import static ch.dissem.bitmessage.utils.Singleton.security;
  * holding private keys.
  */
 public class BitmessageAddress implements Serializable {
+    private static final long serialVersionUID = 2386328540805994064L;
+
     private final long version;
     private final long stream;
     private final byte[] ripe;
@@ -115,6 +119,16 @@ public class BitmessageAddress implements Serializable {
         return result;
     }
 
+    public static List<BitmessageAddress> deterministic(String passphrase, int numberOfAddresses,
+                                                        int version, int stream, boolean shorter) {
+        List<BitmessageAddress> result = new ArrayList<>(numberOfAddresses);
+        List<PrivateKey> privateKeys = PrivateKey.deterministic(passphrase, numberOfAddresses, version, stream, shorter);
+        for (PrivateKey pk : privateKeys) {
+            result.add(new BitmessageAddress(pk));
+        }
+        return result;
+    }
+
     public BitmessageAddress(PrivateKey privateKey) {
         this(privateKey.getPubkey());
         this.privateKey = privateKey;

core/src/main/java/ch/dissem/bitmessage/entity/valueobject/InventoryVector.java

@@ -25,6 +25,8 @@ import java.io.Serializable;
 import java.util.Arrays;
 
 public class InventoryVector implements Streamable, Serializable {
+    private static final long serialVersionUID = -7349009673063348719L;
+
     /**
      * Hash of the object
      */
@@ -42,7 +44,7 @@ public class InventoryVector implements Streamable, Serializable {
 
     @Override
     public int hashCode() {
-        return hash != null ? Arrays.hashCode(hash) : 0;
+        return hash == null ? 0 : Arrays.hashCode(hash);
     }
 
     public byte[] getHash() {

core/src/main/java/ch/dissem/bitmessage/entity/valueobject/Label.java

@@ -20,6 +20,8 @@ import java.io.Serializable;
 import java.util.Objects;
 
 public class Label implements Serializable {
+    private static final long serialVersionUID = 831782893630994914L;
+
     private Object id;
     private String label;
     private Type type;

core/src/main/java/ch/dissem/bitmessage/entity/valueobject/NetworkAddress.java

@@ -31,6 +31,8 @@ import java.util.Arrays;
  * A node's address. It's written in IPv6 format.
  */
 public class NetworkAddress implements Streamable {
+    private static final long serialVersionUID = 2500120578167100300L;
+
     private long time;
 
     /**

core/src/main/java/ch/dissem/bitmessage/entity/valueobject/PrivateKey.java

@@ -26,6 +26,8 @@ import ch.dissem.bitmessage.utils.Decode;
 import ch.dissem.bitmessage.utils.Encode;
 
 import java.io.*;
+import java.util.ArrayList;
+import java.util.List;
 
 import static ch.dissem.bitmessage.utils.Singleton.security;
 
@@ -34,7 +36,10 @@ import static ch.dissem.bitmessage.utils.Singleton.security;
  * {@link Pubkey} object.
  */
 public class PrivateKey implements Streamable {
+    private static final long serialVersionUID = 8562555470709110558L;
+
     public static final int PRIVATE_KEY_SIZE = 32;
+
     private final byte[] privateSigningKey;
     private final byte[] privateEncryptionKey;
 
@@ -70,29 +75,72 @@ public class PrivateKey implements Streamable {
     }
 
     public PrivateKey(long version, long stream, String passphrase) {
+        this(new Builder(version, stream, false).seed(passphrase).generate());
+    }
+
+    private PrivateKey(Builder builder) {
+        this.privateSigningKey = builder.privSK;
+        this.privateEncryptionKey = builder.privEK;
+        this.pubkey = Factory.createPubkey(builder.version, builder.stream, builder.pubSK, builder.pubEK, 0, 0);
+    }
+
+    private static class Builder {
+        final long version;
+        final long stream;
+        final boolean shorter;
+
+        byte[] seed;
+        long nextNonce;
+
+        byte[] privSK, privEK;
+        byte[] pubSK, pubEK;
+
+        private Builder(long version, long stream, boolean shorter) {
+            this.version = version;
+            this.stream = stream;
+            this.shorter = shorter;
+        }
+
+        Builder seed(String passphrase) {
             try {
-            byte[] signingKey;
+                seed = passphrase.getBytes("UTF-8");
-            int signingKeyNonce = 0;
+            } catch (UnsupportedEncodingException e) {
-            byte[] encryptionKey;
+                throw new ApplicationException(e);
-            int encryptionKeyNonce = 1;
+            }
-            byte[] passPhraseBytes = passphrase.getBytes("UTF-8");
+            return this;
+        }
+
+        Builder generate() {
+            try {
+                long signingKeyNonce = nextNonce;
+                long encryptionKeyNonce = nextNonce + 1;
                 byte[] ripe;
                 do {
-                signingKey = Bytes.truncate(security().sha512(passPhraseBytes, Encode.varInt(signingKeyNonce)), 32);
+                    privEK = Bytes.truncate(security().sha512(seed, Encode.varInt(encryptionKeyNonce)), 32);
-                encryptionKey = Bytes.truncate(security().sha512(passPhraseBytes, Encode.varInt(encryptionKeyNonce)), 32);
+                    privSK = Bytes.truncate(security().sha512(seed, Encode.varInt(signingKeyNonce)), 32);
-                byte[] publicSigningKey = security().createPublicKey(signingKey);
+                    pubSK = security().createPublicKey(privSK);
-                byte[] publicEncryptionKey = security().createPublicKey(encryptionKey);
+                    pubEK = security().createPublicKey(privEK);
-                ripe = security().ripemd160(security().sha512(publicSigningKey, publicEncryptionKey));
+                    ripe = security().ripemd160(security().sha512(pubSK, pubEK));
 
                     signingKeyNonce += 2;
                     encryptionKeyNonce += 2;
-            } while (ripe[0] != 0);
+                } while (ripe[0] != 0 || (shorter && ripe[1] != 0));
-            this.privateSigningKey = signingKey;
+                nextNonce = signingKeyNonce;
-            this.privateEncryptionKey = encryptionKey;
-            this.pubkey = security().createPubkey(version, stream, privateSigningKey, privateEncryptionKey, 0, 0);
             } catch (IOException e) {
                 throw new ApplicationException(e);
             }
+            return this;
+        }
+    }
+
+    public static List<PrivateKey> deterministic(String passphrase, int numberOfAddresses, long version, long stream, boolean shorter) {
+        List<PrivateKey> result = new ArrayList<>(numberOfAddresses);
+        Builder builder = new Builder(version, stream, shorter).seed(passphrase);
+        for (int i = 0; i < numberOfAddresses; i++) {
+            builder.generate();
+            result.add(new PrivateKey(builder));
+        }
+        return result;
     }
 
     public static PrivateKey read(InputStream is) throws IOException {

core/src/main/java/ch/dissem/bitmessage/utils/Base58.java

@@ -31,7 +31,7 @@ import static java.util.Arrays.copyOfRange;
  */
 public class Base58 {
     private static final int[] INDEXES = new int[128];
-    private static char[] ALPHABET = "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz".toCharArray();
+    private static final char[] ALPHABET = "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz".toCharArray();
 
     static {
         for (int i = 0; i < INDEXES.length; i++) {