Break project up into Java and Android build/test.

73 files changed, 258 insertions, 11 deletions

diff --git a/java/build.gradle b/java/build.gradle
new file mode 100644
index 00000000..11834e6b
--- /dev/null
+++ b/java/build.gradle
@@ -0,0 +1,83 @@
+apply plugin: 'java'
+apply plugin: 'maven'
+apply plugin: 'signing'
+
+sourceCompatibility = 1.7
+archivesBaseName = "axolotl-java"
+version          = version_number
+group            = group_info
+
+repositories {
+    mavenCentral()
+    mavenLocal()
+}
+
+sourceSets {
+    test {
+        java {
+            srcDirs = ['src/test/java/', project(':tests').file('src/main/java')]
+        }
+    }
+}
+
+dependencies {
+    compile "org.whispersystems:curve25519-java:${curve25519_version}"
+    compile 'com.google.protobuf:protobuf-java:2.5.0'
+
+    testCompile ('junit:junit:3.8.2')
+}
+
+
+test {
+    testLogging {
+        events 'passed'
+        showStandardStreams = true
+    }
+
+    include 'org/whispersystems/**'
+}
+
+signing {
+    required { has("release") && gradle.taskGraph.hasTask("uploadArchives") }
+    sign configurations.archives
+}
+
+uploadArchives {
+    configuration = configurations.archives
+    repositories.mavenDeployer {
+        beforeDeployment { MavenDeployment deployment -> signing.signPom(deployment) }
+
+        repository(url: sonatypeRepo) {
+            authentication(userName: whisperSonatypeUsername, password: whisperSonatypePassword)
+        }
+
+        pom.project {
+            name 'axolotl-java'
+            packaging 'jar'
+            description 'Axolotl library for Java'
+            url 'https://github.com/WhisperSystems/libaxolotl-android'
+
+            scm {
+                url 'scm:git@github.com:WhisperSystems/libaxolotl-android.git'
+                connection 'scm:git@github.com:WhisperSystems/libaxolotl-android.git'
+                developerConnection 'scm:git@github.com:WhisperSystems/libaxolotl-android.git'
+            }
+
+            developers {
+                developer {
+                    name 'Moxie Marlinspike'
+                }
+            }
+        }
+    }
+}
+
+task installArchives(type: Upload) {
+    description "Installs the artifacts to the local Maven repository."
+    configuration = configurations['archives']
+    repositories {
+        mavenDeployer {
+            repository url: "file://${System.properties['user.home']}/.m2/repository"
+        }
+    }
+}
diff --git a/src/main/java/org/whispersystems/libaxolotl/DuplicateMessageException.java b/java/src/main/java/org/whispersystems/libaxolotl/DuplicateMessageException.java
index 913c0121..913c0121 100644
--- a/src/main/java/org/whispersystems/libaxolotl/DuplicateMessageException.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/DuplicateMessageException.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/IdentityKey.java b/java/src/main/java/org/whispersystems/libaxolotl/IdentityKey.java
index 35af3394..35af3394 100644
--- a/src/main/java/org/whispersystems/libaxolotl/IdentityKey.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/IdentityKey.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/IdentityKeyPair.java b/java/src/main/java/org/whispersystems/libaxolotl/IdentityKeyPair.java
index c47df4bc..c47df4bc 100644
--- a/src/main/java/org/whispersystems/libaxolotl/IdentityKeyPair.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/IdentityKeyPair.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/InvalidKeyException.java b/java/src/main/java/org/whispersystems/libaxolotl/InvalidKeyException.java
index bb70df16..bb70df16 100644
--- a/src/main/java/org/whispersystems/libaxolotl/InvalidKeyException.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/InvalidKeyException.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/InvalidKeyIdException.java b/java/src/main/java/org/whispersystems/libaxolotl/InvalidKeyIdException.java
index c7c6bc01..c7c6bc01 100644
--- a/src/main/java/org/whispersystems/libaxolotl/InvalidKeyIdException.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/InvalidKeyIdException.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/InvalidMacException.java b/java/src/main/java/org/whispersystems/libaxolotl/InvalidMacException.java
index 0afc6996..0afc6996 100644
--- a/src/main/java/org/whispersystems/libaxolotl/InvalidMacException.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/InvalidMacException.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/InvalidMessageException.java b/java/src/main/java/org/whispersystems/libaxolotl/InvalidMessageException.java
index 063eb594..063eb594 100644
--- a/src/main/java/org/whispersystems/libaxolotl/InvalidMessageException.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/InvalidMessageException.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/InvalidVersionException.java b/java/src/main/java/org/whispersystems/libaxolotl/InvalidVersionException.java
index a1324443..a1324443 100644
--- a/src/main/java/org/whispersystems/libaxolotl/InvalidVersionException.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/InvalidVersionException.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/LegacyMessageException.java b/java/src/main/java/org/whispersystems/libaxolotl/LegacyMessageException.java
index dadde754..dadde754 100644
--- a/src/main/java/org/whispersystems/libaxolotl/LegacyMessageException.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/LegacyMessageException.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/NoSessionException.java b/java/src/main/java/org/whispersystems/libaxolotl/NoSessionException.java
index 16203554..16203554 100644
--- a/src/main/java/org/whispersystems/libaxolotl/NoSessionException.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/NoSessionException.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/SessionBuilder.java b/java/src/main/java/org/whispersystems/libaxolotl/SessionBuilder.java
index 2d1c8969..736d9ab1 100644
--- a/src/main/java/org/whispersystems/libaxolotl/SessionBuilder.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/SessionBuilder.java
@@ -1,10 +1,10 @@
 package org.whispersystems.libaxolotl;
 
-import android.util.Log;
 
 import org.whispersystems.libaxolotl.ecc.Curve;
 import org.whispersystems.libaxolotl.ecc.ECKeyPair;
 import org.whispersystems.libaxolotl.ecc.ECPublicKey;
+import org.whispersystems.libaxolotl.logging.Log;
 import org.whispersystems.libaxolotl.protocol.CiphertextMessage;
 import org.whispersystems.libaxolotl.protocol.KeyExchangeMessage;
 import org.whispersystems.libaxolotl.protocol.PreKeyWhisperMessage;
diff --git a/src/main/java/org/whispersystems/libaxolotl/SessionCipher.java b/java/src/main/java/org/whispersystems/libaxolotl/SessionCipher.java
index 381dedb8..381dedb8 100644
--- a/src/main/java/org/whispersystems/libaxolotl/SessionCipher.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/SessionCipher.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/StaleKeyExchangeException.java b/java/src/main/java/org/whispersystems/libaxolotl/StaleKeyExchangeException.java
index f94a3008..f94a3008 100644
--- a/src/main/java/org/whispersystems/libaxolotl/StaleKeyExchangeException.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/StaleKeyExchangeException.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/UntrustedIdentityException.java b/java/src/main/java/org/whispersystems/libaxolotl/UntrustedIdentityException.java
index f434b923..f434b923 100644
--- a/src/main/java/org/whispersystems/libaxolotl/UntrustedIdentityException.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/UntrustedIdentityException.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/ecc/Curve.java b/java/src/main/java/org/whispersystems/libaxolotl/ecc/Curve.java
index 66b8cc3a..5d47e3aa 100644
--- a/src/main/java/org/whispersystems/libaxolotl/ecc/Curve.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/ecc/Curve.java
@@ -16,25 +16,41 @@
  */
 package org.whispersystems.libaxolotl.ecc;
 
+import org.whispersystems.curve25519.Curve25519KeyPair;
 import org.whispersystems.libaxolotl.InvalidKeyException;
+import org.whispersystems.curve25519.Curve25519;
+
+import java.security.NoSuchAlgorithmException;
+import java.security.SecureRandom;
 
 public class Curve {
 
   public  static final int DJB_TYPE   = 0x05;
 
+  public static boolean isNative() {
+    return Curve25519.isNative();
+  }
+
   public static ECKeyPair generateKeyPair() {
-    return Curve25519.generateKeyPair();
+    SecureRandom      secureRandom = getSecureRandom();
+    Curve25519KeyPair keyPair      = Curve25519.generateKeyPair(secureRandom);
+
+    return new ECKeyPair(new DjbECPublicKey(keyPair.getPublicKey()),
+                         new DjbECPrivateKey(keyPair.getPrivateKey()));
   }
 
   public static ECPublicKey decodePoint(byte[] bytes, int offset)
       throws InvalidKeyException
   {
-    int type = bytes[offset];
+    int type = bytes[offset] & 0xFF;
 
-    if (type == DJB_TYPE) {
-      return Curve25519.decodePoint(bytes, offset);
-    } else {
-      throw new InvalidKeyException("Unknown key type: " + type);
+    switch (type) {
+      case Curve.DJB_TYPE:
+        byte[] keyBytes = new byte[32];
+        System.arraycopy(bytes, offset+1, keyBytes, 0, keyBytes.length);
+        return new DjbECPublicKey(keyBytes);
+      default:
+        throw new InvalidKeyException("Bad key type: " + type);
     }
   }
 
@@ -50,7 +66,8 @@ public class Curve {
     }
 
     if (publicKey.getType() == DJB_TYPE) {
-      return Curve25519.calculateAgreement(publicKey, privateKey);
+      return Curve25519.calculateAgreement(((DjbECPublicKey)publicKey).getPublicKey(),
+                                           ((DjbECPrivateKey)privateKey).getPrivateKey());
     } else {
       throw new InvalidKeyException("Unknown type: " + publicKey.getType());
     }
@@ -60,7 +77,7 @@ public class Curve {
       throws InvalidKeyException
   {
     if (signingKey.getType() == DJB_TYPE) {
-      return Curve25519.verifySignature(signingKey, message, signature);
+      return Curve25519.verifySignature(((DjbECPublicKey)signingKey).getPublicKey(), message, signature);
     } else {
       throw new InvalidKeyException("Unknown type: " + signingKey.getType());
     }
@@ -70,9 +87,17 @@ public class Curve {
       throws InvalidKeyException
   {
     if (signingKey.getType() == DJB_TYPE) {
-      return Curve25519.calculateSignature(signingKey, message);
+      return Curve25519.calculateSignature(getSecureRandom(), ((DjbECPrivateKey)signingKey).getPrivateKey(), message);
     } else {
       throw new InvalidKeyException("Unknown type: " + signingKey.getType());
     }
   }
+
+  private static SecureRandom getSecureRandom() {
+    try {
+      return SecureRandom.getInstance("SHA1PRNG");
+    } catch (NoSuchAlgorithmException e) {
+      throw new AssertionError(e);
+    }
+  }
 }
diff --git a/src/main/java/org/whispersystems/libaxolotl/ecc/DjbECPrivateKey.java b/java/src/main/java/org/whispersystems/libaxolotl/ecc/DjbECPrivateKey.java
index ecb55b4e..ecb55b4e 100644
--- a/src/main/java/org/whispersystems/libaxolotl/ecc/DjbECPrivateKey.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/ecc/DjbECPrivateKey.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/ecc/DjbECPublicKey.java b/java/src/main/java/org/whispersystems/libaxolotl/ecc/DjbECPublicKey.java
index 9f66d439..9f66d439 100644
--- a/src/main/java/org/whispersystems/libaxolotl/ecc/DjbECPublicKey.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/ecc/DjbECPublicKey.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/ecc/ECKeyPair.java b/java/src/main/java/org/whispersystems/libaxolotl/ecc/ECKeyPair.java
index bcaec927..bcaec927 100644
--- a/src/main/java/org/whispersystems/libaxolotl/ecc/ECKeyPair.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/ecc/ECKeyPair.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/ecc/ECPrivateKey.java b/java/src/main/java/org/whispersystems/libaxolotl/ecc/ECPrivateKey.java
index 922057de..922057de 100644
--- a/src/main/java/org/whispersystems/libaxolotl/ecc/ECPrivateKey.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/ecc/ECPrivateKey.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/ecc/ECPublicKey.java b/java/src/main/java/org/whispersystems/libaxolotl/ecc/ECPublicKey.java
index 12576807..12576807 100644
--- a/src/main/java/org/whispersystems/libaxolotl/ecc/ECPublicKey.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/ecc/ECPublicKey.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/groups/GroupCipher.java b/java/src/main/java/org/whispersystems/libaxolotl/groups/GroupCipher.java
index 43dac752..43dac752 100644
--- a/src/main/java/org/whispersystems/libaxolotl/groups/GroupCipher.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/groups/GroupCipher.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/groups/GroupSessionBuilder.java b/java/src/main/java/org/whispersystems/libaxolotl/groups/GroupSessionBuilder.java
index 8b73484b..8b73484b 100644
--- a/src/main/java/org/whispersystems/libaxolotl/groups/GroupSessionBuilder.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/groups/GroupSessionBuilder.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/groups/ratchet/SenderChainKey.java b/java/src/main/java/org/whispersystems/libaxolotl/groups/ratchet/SenderChainKey.java
index 71375923..71375923 100644
--- a/src/main/java/org/whispersystems/libaxolotl/groups/ratchet/SenderChainKey.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/groups/ratchet/SenderChainKey.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/groups/ratchet/SenderMessageKey.java b/java/src/main/java/org/whispersystems/libaxolotl/groups/ratchet/SenderMessageKey.java
index 8808a8e8..8808a8e8 100644
--- a/src/main/java/org/whispersystems/libaxolotl/groups/ratchet/SenderMessageKey.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/groups/ratchet/SenderMessageKey.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/groups/state/SenderKeyRecord.java b/java/src/main/java/org/whispersystems/libaxolotl/groups/state/SenderKeyRecord.java
index bb1ba952..bb1ba952 100644
--- a/src/main/java/org/whispersystems/libaxolotl/groups/state/SenderKeyRecord.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/groups/state/SenderKeyRecord.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/groups/state/SenderKeyState.java b/java/src/main/java/org/whispersystems/libaxolotl/groups/state/SenderKeyState.java
index 80498ce0..80498ce0 100644
--- a/src/main/java/org/whispersystems/libaxolotl/groups/state/SenderKeyState.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/groups/state/SenderKeyState.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/groups/state/SenderKeyStore.java b/java/src/main/java/org/whispersystems/libaxolotl/groups/state/SenderKeyStore.java
index da01b1f3..da01b1f3 100644
--- a/src/main/java/org/whispersystems/libaxolotl/groups/state/SenderKeyStore.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/groups/state/SenderKeyStore.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/kdf/DerivedMessageSecrets.java b/java/src/main/java/org/whispersystems/libaxolotl/kdf/DerivedMessageSecrets.java
index b3f54fb8..b3f54fb8 100644
--- a/src/main/java/org/whispersystems/libaxolotl/kdf/DerivedMessageSecrets.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/kdf/DerivedMessageSecrets.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/kdf/DerivedRootSecrets.java b/java/src/main/java/org/whispersystems/libaxolotl/kdf/DerivedRootSecrets.java
index 82cc541d..82cc541d 100644
--- a/src/main/java/org/whispersystems/libaxolotl/kdf/DerivedRootSecrets.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/kdf/DerivedRootSecrets.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/kdf/HKDF.java b/java/src/main/java/org/whispersystems/libaxolotl/kdf/HKDF.java
index d190822d..d190822d 100644
--- a/src/main/java/org/whispersystems/libaxolotl/kdf/HKDF.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/kdf/HKDF.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/kdf/HKDFv2.java b/java/src/main/java/org/whispersystems/libaxolotl/kdf/HKDFv2.java
index 86e4bf5f..86e4bf5f 100644
--- a/src/main/java/org/whispersystems/libaxolotl/kdf/HKDFv2.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/kdf/HKDFv2.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/kdf/HKDFv3.java b/java/src/main/java/org/whispersystems/libaxolotl/kdf/HKDFv3.java
index a1934c90..a1934c90 100644
--- a/src/main/java/org/whispersystems/libaxolotl/kdf/HKDFv3.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/kdf/HKDFv3.java
diff --git a/java/src/main/java/org/whispersystems/libaxolotl/logging/AxolotlLogger.java b/java/src/main/java/org/whispersystems/libaxolotl/logging/AxolotlLogger.java
new file mode 100644
index 00000000..e8baf5e4
--- /dev/null
+++ b/java/src/main/java/org/whispersystems/libaxolotl/logging/AxolotlLogger.java
@@ -0,0 +1,13 @@
+package org.whispersystems.libaxolotl.logging;
+
+public interface AxolotlLogger {
+
+  public static final int VERBOSE = 2;
+  public static final int DEBUG   = 3;
+  public static final int INFO    = 4;
+  public static final int WARN    = 5;
+  public static final int ERROR   = 6;
+  public static final int ASSERT  = 7;
+
+  public void log(int priority, String tag, String message);
+}
diff --git a/java/src/main/java/org/whispersystems/libaxolotl/logging/AxolotlLoggerProvider.java b/java/src/main/java/org/whispersystems/libaxolotl/logging/AxolotlLoggerProvider.java
new file mode 100644
index 00000000..e385aa09
--- /dev/null
+++ b/java/src/main/java/org/whispersystems/libaxolotl/logging/AxolotlLoggerProvider.java
@@ -0,0 +1,14 @@
+package org.whispersystems.libaxolotl.logging;
+
+public class AxolotlLoggerProvider {
+
+  private static AxolotlLogger provider;
+
+  public static AxolotlLogger getProvider() {
+    return provider;
+  }
+
+  public static void setProvider(AxolotlLogger provider) {
+    AxolotlLoggerProvider.provider = provider;
+  }
+}
diff --git a/java/src/main/java/org/whispersystems/libaxolotl/logging/Log.java b/java/src/main/java/org/whispersystems/libaxolotl/logging/Log.java
new file mode 100644
index 00000000..22db9baf
--- /dev/null
+++ b/java/src/main/java/org/whispersystems/libaxolotl/logging/Log.java
@@ -0,0 +1,86 @@
+package org.whispersystems.libaxolotl.logging;
+
+import java.io.PrintWriter;
+import java.io.StringWriter;
+import java.net.UnknownHostException;
+
+public class Log {
+
+  private Log() {}
+
+  public static void v(String tag, String msg) {
+    log(AxolotlLogger.VERBOSE, tag, msg);
+  }
+
+  public static void v(String tag, String msg, Throwable tr) {
+    log(AxolotlLogger.VERBOSE, tag, msg + '\n' + getStackTraceString(tr));
+  }
+
+  public static void d(String tag, String msg) {
+    log(AxolotlLogger.DEBUG, tag, msg);
+  }
+
+  public static void d(String tag, String msg, Throwable tr) {
+    log(AxolotlLogger.DEBUG, tag, msg + '\n' + getStackTraceString(tr));
+  }
+
+  public static void i(String tag, String msg) {
+    log(AxolotlLogger.INFO, tag, msg);
+  }
+
+  public static void i(String tag, String msg, Throwable tr) {
+    log(AxolotlLogger.INFO, tag, msg + '\n' + getStackTraceString(tr));
+  }
+
+  public static void w(String tag, String msg) {
+    log(AxolotlLogger.WARN, tag, msg);
+  }
+
+  public static void w(String tag, String msg, Throwable tr) {
+    log(AxolotlLogger.WARN, tag, msg + '\n' + getStackTraceString(tr));
+  }
+
+  public static void w(String tag, Throwable tr) {
+    log(AxolotlLogger.WARN, tag, getStackTraceString(tr));
+  }
+
+  public static void e(String tag, String msg) {
+    log(AxolotlLogger.ERROR, tag, msg);
+  }
+
+  public static void e(String tag, String msg, Throwable tr) {
+    log(AxolotlLogger.ERROR, tag, msg + '\n' + getStackTraceString(tr));
+  }
+
+  private static String getStackTraceString(Throwable tr) {
+    if (tr == null) {
+      return "";
+    }
+
+    // This is to reduce the amount of log spew that apps do in the non-error
+    // condition of the network being unavailable.
+    Throwable t = tr;
+    while (t != null) {
+      if (t instanceof UnknownHostException) {
+        return "";
+      }
+      t = t.getCause();
+    }
+
+    StringWriter sw = new StringWriter();
+    PrintWriter pw = new PrintWriter(sw);
+    tr.printStackTrace(pw);
+    pw.flush();
+    return sw.toString();
+  }
+
+  private static void log(int priority, String tag, String msg) {
+    AxolotlLogger logger = AxolotlLoggerProvider.getProvider();
+
+    if (logger != null) {
+      logger.log(priority, tag, msg);
+    }
+  }
+
+
+}
diff --git a/src/main/java/org/whispersystems/libaxolotl/protocol/CiphertextMessage.java b/java/src/main/java/org/whispersystems/libaxolotl/protocol/CiphertextMessage.java
index cf4be756..cf4be756 100644
--- a/src/main/java/org/whispersystems/libaxolotl/protocol/CiphertextMessage.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/protocol/CiphertextMessage.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/protocol/KeyExchangeMessage.java b/java/src/main/java/org/whispersystems/libaxolotl/protocol/KeyExchangeMessage.java
index bec9208c..bec9208c 100644
--- a/src/main/java/org/whispersystems/libaxolotl/protocol/KeyExchangeMessage.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/protocol/KeyExchangeMessage.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/protocol/PreKeyWhisperMessage.java b/java/src/main/java/org/whispersystems/libaxolotl/protocol/PreKeyWhisperMessage.java
index fff6d02a..fff6d02a 100644
--- a/src/main/java/org/whispersystems/libaxolotl/protocol/PreKeyWhisperMessage.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/protocol/PreKeyWhisperMessage.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/protocol/SenderKeyDistributionMessage.java b/java/src/main/java/org/whispersystems/libaxolotl/protocol/SenderKeyDistributionMessage.java
index 424dd87c..424dd87c 100644
--- a/src/main/java/org/whispersystems/libaxolotl/protocol/SenderKeyDistributionMessage.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/protocol/SenderKeyDistributionMessage.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/protocol/SenderKeyMessage.java b/java/src/main/java/org/whispersystems/libaxolotl/protocol/SenderKeyMessage.java
index b3a17456..b3a17456 100644
--- a/src/main/java/org/whispersystems/libaxolotl/protocol/SenderKeyMessage.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/protocol/SenderKeyMessage.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/protocol/WhisperMessage.java b/java/src/main/java/org/whispersystems/libaxolotl/protocol/WhisperMessage.java
index 980bec1f..980bec1f 100644
--- a/src/main/java/org/whispersystems/libaxolotl/protocol/WhisperMessage.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/protocol/WhisperMessage.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/protocol/WhisperProtos.java b/java/src/main/java/org/whispersystems/libaxolotl/protocol/WhisperProtos.java
index 12ab0272..12ab0272 100644
--- a/src/main/java/org/whispersystems/libaxolotl/protocol/WhisperProtos.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/protocol/WhisperProtos.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/ratchet/AliceAxolotlParameters.java b/java/src/main/java/org/whispersystems/libaxolotl/ratchet/AliceAxolotlParameters.java
index 13c995e9..13c995e9 100644
--- a/src/main/java/org/whispersystems/libaxolotl/ratchet/AliceAxolotlParameters.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/ratchet/AliceAxolotlParameters.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/ratchet/BobAxolotlParameters.java b/java/src/main/java/org/whispersystems/libaxolotl/ratchet/BobAxolotlParameters.java
index 27116a8b..27116a8b 100644
--- a/src/main/java/org/whispersystems/libaxolotl/ratchet/BobAxolotlParameters.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/ratchet/BobAxolotlParameters.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/ratchet/ChainKey.java b/java/src/main/java/org/whispersystems/libaxolotl/ratchet/ChainKey.java
index 9dd1dbee..9dd1dbee 100644
--- a/src/main/java/org/whispersystems/libaxolotl/ratchet/ChainKey.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/ratchet/ChainKey.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/ratchet/MessageKeys.java b/java/src/main/java/org/whispersystems/libaxolotl/ratchet/MessageKeys.java
index 95a8c7dc..95a8c7dc 100644
--- a/src/main/java/org/whispersystems/libaxolotl/ratchet/MessageKeys.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/ratchet/MessageKeys.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/ratchet/RatchetingSession.java b/java/src/main/java/org/whispersystems/libaxolotl/ratchet/RatchetingSession.java
index ec9af6d9..ec9af6d9 100644
--- a/src/main/java/org/whispersystems/libaxolotl/ratchet/RatchetingSession.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/ratchet/RatchetingSession.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/ratchet/RootKey.java b/java/src/main/java/org/whispersystems/libaxolotl/ratchet/RootKey.java
index 39f3a831..39f3a831 100644
--- a/src/main/java/org/whispersystems/libaxolotl/ratchet/RootKey.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/ratchet/RootKey.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/ratchet/SymmetricAxolotlParameters.java b/java/src/main/java/org/whispersystems/libaxolotl/ratchet/SymmetricAxolotlParameters.java
index 7a63c45f..7a63c45f 100644
--- a/src/main/java/org/whispersystems/libaxolotl/ratchet/SymmetricAxolotlParameters.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/ratchet/SymmetricAxolotlParameters.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/state/AxolotlStore.java b/java/src/main/java/org/whispersystems/libaxolotl/state/AxolotlStore.java
index 2fda9a21..2fda9a21 100644
--- a/src/main/java/org/whispersystems/libaxolotl/state/AxolotlStore.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/state/AxolotlStore.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/state/IdentityKeyStore.java b/java/src/main/java/org/whispersystems/libaxolotl/state/IdentityKeyStore.java
index d2024f78..d2024f78 100644
--- a/src/main/java/org/whispersystems/libaxolotl/state/IdentityKeyStore.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/state/IdentityKeyStore.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/state/PreKeyBundle.java b/java/src/main/java/org/whispersystems/libaxolotl/state/PreKeyBundle.java
index 772bcc14..772bcc14 100644
--- a/src/main/java/org/whispersystems/libaxolotl/state/PreKeyBundle.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/state/PreKeyBundle.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/state/PreKeyRecord.java b/java/src/main/java/org/whispersystems/libaxolotl/state/PreKeyRecord.java
index 0ea905f4..0ea905f4 100644
--- a/src/main/java/org/whispersystems/libaxolotl/state/PreKeyRecord.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/state/PreKeyRecord.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/state/PreKeyStore.java b/java/src/main/java/org/whispersystems/libaxolotl/state/PreKeyStore.java
index 7dc5e626..7dc5e626 100644
--- a/src/main/java/org/whispersystems/libaxolotl/state/PreKeyStore.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/state/PreKeyStore.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/state/SessionRecord.java b/java/src/main/java/org/whispersystems/libaxolotl/state/SessionRecord.java
index 76c64922..76c64922 100644
--- a/src/main/java/org/whispersystems/libaxolotl/state/SessionRecord.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/state/SessionRecord.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/state/SessionState.java b/java/src/main/java/org/whispersystems/libaxolotl/state/SessionState.java
index 9b2b1e2a..e724e7df 100644
--- a/src/main/java/org/whispersystems/libaxolotl/state/SessionState.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/state/SessionState.java
@@ -17,7 +17,6 @@
 
 package org.whispersystems.libaxolotl.state;
 
-import android.util.Log;
 
 import com.google.protobuf.ByteString;
 
@@ -29,6 +28,7 @@ import org.whispersystems.libaxolotl.ecc.ECKeyPair;
 import org.whispersystems.libaxolotl.ecc.ECPrivateKey;
 import org.whispersystems.libaxolotl.ecc.ECPublicKey;
 import org.whispersystems.libaxolotl.kdf.HKDF;
+import org.whispersystems.libaxolotl.logging.Log;
 import org.whispersystems.libaxolotl.ratchet.ChainKey;
 import org.whispersystems.libaxolotl.ratchet.MessageKeys;
 import org.whispersystems.libaxolotl.ratchet.RootKey;
diff --git a/src/main/java/org/whispersystems/libaxolotl/state/SessionStore.java b/java/src/main/java/org/whispersystems/libaxolotl/state/SessionStore.java
index c5ad00b0..c5ad00b0 100644
--- a/src/main/java/org/whispersystems/libaxolotl/state/SessionStore.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/state/SessionStore.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/state/SignedPreKeyRecord.java b/java/src/main/java/org/whispersystems/libaxolotl/state/SignedPreKeyRecord.java
index f11f5cf1..f11f5cf1 100644
--- a/src/main/java/org/whispersystems/libaxolotl/state/SignedPreKeyRecord.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/state/SignedPreKeyRecord.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/state/SignedPreKeyStore.java b/java/src/main/java/org/whispersystems/libaxolotl/state/SignedPreKeyStore.java
index c828bf23..c828bf23 100644
--- a/src/main/java/org/whispersystems/libaxolotl/state/SignedPreKeyStore.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/state/SignedPreKeyStore.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/state/StorageProtos.java b/java/src/main/java/org/whispersystems/libaxolotl/state/StorageProtos.java
index b3e3e0e6..b3e3e0e6 100644
--- a/src/main/java/org/whispersystems/libaxolotl/state/StorageProtos.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/state/StorageProtos.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/util/ByteUtil.java b/java/src/main/java/org/whispersystems/libaxolotl/util/ByteUtil.java
index c213ba0b..c213ba0b 100644
--- a/src/main/java/org/whispersystems/libaxolotl/util/ByteUtil.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/util/ByteUtil.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/util/Hex.java b/java/src/main/java/org/whispersystems/libaxolotl/util/Hex.java
index 19285464..19285464 100644
--- a/src/main/java/org/whispersystems/libaxolotl/util/Hex.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/util/Hex.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/util/KeyHelper.java b/java/src/main/java/org/whispersystems/libaxolotl/util/KeyHelper.java
index 96ee6563..96ee6563 100644
--- a/src/main/java/org/whispersystems/libaxolotl/util/KeyHelper.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/util/KeyHelper.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/util/Medium.java b/java/src/main/java/org/whispersystems/libaxolotl/util/Medium.java
index d18b2d66..d18b2d66 100644
--- a/src/main/java/org/whispersystems/libaxolotl/util/Medium.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/util/Medium.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/util/Pair.java b/java/src/main/java/org/whispersystems/libaxolotl/util/Pair.java
index 0476d932..0476d932 100644
--- a/src/main/java/org/whispersystems/libaxolotl/util/Pair.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/util/Pair.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/util/guava/Absent.java b/java/src/main/java/org/whispersystems/libaxolotl/util/guava/Absent.java
index bd06ded9..bd06ded9 100644
--- a/src/main/java/org/whispersystems/libaxolotl/util/guava/Absent.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/util/guava/Absent.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/util/guava/Function.java b/java/src/main/java/org/whispersystems/libaxolotl/util/guava/Function.java
index 1ad516c5..1ad516c5 100644
--- a/src/main/java/org/whispersystems/libaxolotl/util/guava/Function.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/util/guava/Function.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/util/guava/Optional.java b/java/src/main/java/org/whispersystems/libaxolotl/util/guava/Optional.java
index 4f2de832..4f2de832 100644
--- a/src/main/java/org/whispersystems/libaxolotl/util/guava/Optional.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/util/guava/Optional.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/util/guava/Preconditions.java b/java/src/main/java/org/whispersystems/libaxolotl/util/guava/Preconditions.java
index ce253c65..ce253c65 100644
--- a/src/main/java/org/whispersystems/libaxolotl/util/guava/Preconditions.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/util/guava/Preconditions.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/util/guava/Present.java b/java/src/main/java/org/whispersystems/libaxolotl/util/guava/Present.java
index 630570ff..630570ff 100644
--- a/src/main/java/org/whispersystems/libaxolotl/util/guava/Present.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/util/guava/Present.java
diff --git a/src/main/java/org/whispersystems/libaxolotl/util/guava/Supplier.java b/java/src/main/java/org/whispersystems/libaxolotl/util/guava/Supplier.java
index ba880707..ba880707 100644
--- a/src/main/java/org/whispersystems/libaxolotl/util/guava/Supplier.java
+++ b/java/src/main/java/org/whispersystems/libaxolotl/util/guava/Supplier.java
diff --git a/java/src/test/java/org/whispersystems/libaxolotl/CurveTest.java b/java/src/test/java/org/whispersystems/libaxolotl/CurveTest.java
new file mode 100644
index 00000000..734f6c86
--- /dev/null
+++ b/java/src/test/java/org/whispersystems/libaxolotl/CurveTest.java
@@ -0,0 +1,26 @@
+package org.whispersystems.libaxolotl;
+
+import junit.framework.TestCase;
+
+import org.whispersystems.libaxolotl.ecc.Curve;
+import org.whispersystems.libaxolotl.ecc.ECKeyPair;
+
+public class CurveTest extends TestCase {
+
+  public void testPureJava() {
+    assertFalse(Curve.isNative());
+  }
+
+  public void testSignatureOverflow() throws InvalidKeyException {
+    ECKeyPair keys    = Curve.generateKeyPair();
+    byte[]    message = new byte[4096];
+
+    try {
+      byte[] signature = Curve.calculateSignature(keys.getPrivateKey(), message);
+      throw new InvalidKeyException("Should have asserted!");
+    } catch (IllegalArgumentException e) {
+      // Success!
+    }
+  }
+
+}