Remove Schnorr experiment

Makefile.am

@@ -154,10 +154,6 @@ if ENABLE_MODULE_ECDH
 include src/modules/ecdh/Makefile.am.include
 endif
 
-if ENABLE_MODULE_SCHNORR
-include src/modules/schnorr/Makefile.am.include
-endif
-
 if ENABLE_MODULE_RECOVERY
 include src/modules/recovery/Makefile.am.include
 endif

configure.ac

@@ -119,11 +119,6 @@ AC_ARG_ENABLE(module_ecdh,
     [enable_module_ecdh=$enableval],
     [enable_module_ecdh=no])
 
-AC_ARG_ENABLE(module_schnorr,
-    AS_HELP_STRING([--enable-module-schnorr],[enable Schnorr signature module (experimental)]),
-    [enable_module_schnorr=$enableval],
-    [enable_module_schnorr=no])
-
 AC_ARG_ENABLE(module_recovery,
     AS_HELP_STRING([--enable-module-recovery],[enable ECDSA pubkey recovery module (default is no)]),
     [enable_module_recovery=$enableval],
@@ -381,9 +376,6 @@ fi
 if test x"$use_jni" != x"no"; then
   AX_JNI_INCLUDE_DIR
   have_jni_dependencies=yes
-  if test x"$enable_module_schnorr" = x"no"; then
-    have_jni_dependencies=no
-  fi
   if test x"$enable_module_ecdh" = x"no"; then
     have_jni_dependencies=no
   fi
@@ -392,7 +384,7 @@ if test x"$use_jni" != x"no"; then
   fi
   if test "x$have_jni_dependencies" = "xno"; then
     if test x"$use_jni" = x"yes"; then
-      AC_MSG_ERROR([jni support explicitly requested but headers/dependencies were not found. Enable ECDH and Schnorr and try again.])
+      AC_MSG_ERROR([jni support explicitly requested but headers/dependencies were not found. Enable ECDH and try again.])
     fi
     AC_MSG_WARN([jni headers/dependencies not found. jni support disabled])
     use_jni=no
@@ -421,10 +413,6 @@ if test x"$enable_module_ecdh" = x"yes"; then
   AC_DEFINE(ENABLE_MODULE_ECDH, 1, [Define this symbol to enable the ECDH module])
 fi
 
-if test x"$enable_module_schnorr" = x"yes"; then
-  AC_DEFINE(ENABLE_MODULE_SCHNORR, 1, [Define this symbol to enable the Schnorr signature module])
-fi
-
 if test x"$enable_module_recovery" = x"yes"; then
   AC_DEFINE(ENABLE_MODULE_RECOVERY, 1, [Define this symbol to enable the ECDSA pubkey recovery module])
 fi
@@ -442,7 +430,6 @@ AC_MSG_NOTICE([Using bignum implementation: $set_bignum])
 AC_MSG_NOTICE([Using scalar implementation: $set_scalar])
 AC_MSG_NOTICE([Using endomorphism optimizations: $use_endomorphism])
 AC_MSG_NOTICE([Building ECDH module: $enable_module_ecdh])
-AC_MSG_NOTICE([Building Schnorr signatures module: $enable_module_schnorr])
 AC_MSG_NOTICE([Building ECDSA pubkey recovery module: $enable_module_recovery])
 AC_MSG_NOTICE([Using jni: $use_jni])
 
@@ -451,12 +438,8 @@ if test x"$enable_experimental" = x"yes"; then
   AC_MSG_NOTICE([WARNING: experimental build])
   AC_MSG_NOTICE([Experimental features do not have stable APIs or properties, and may not be safe for production use.])
   AC_MSG_NOTICE([Building ECDH module: $enable_module_ecdh])
-  AC_MSG_NOTICE([Building Schnorr signatures module: $enable_module_schnorr])
   AC_MSG_NOTICE([******])
 else
-  if test x"$enable_module_schnorr" = x"yes"; then
-    AC_MSG_ERROR([Schnorr signature module is experimental. Use --enable-experimental to allow.])
-  fi
   if test x"$enable_module_ecdh" = x"yes"; then
     AC_MSG_ERROR([ECDH module is experimental. Use --enable-experimental to allow.])
   fi
@@ -476,7 +459,6 @@ AM_CONDITIONAL([USE_TESTS], [test x"$use_tests" != x"no"])
 AM_CONDITIONAL([USE_BENCHMARK], [test x"$use_benchmark" = x"yes"])
 AM_CONDITIONAL([USE_ECMULT_STATIC_PRECOMPUTATION], [test x"$set_precomp" = x"yes"])
 AM_CONDITIONAL([ENABLE_MODULE_ECDH], [test x"$enable_module_ecdh" = x"yes"])
-AM_CONDITIONAL([ENABLE_MODULE_SCHNORR], [test x"$enable_module_schnorr" = x"yes"])
 AM_CONDITIONAL([ENABLE_MODULE_RECOVERY], [test x"$enable_module_recovery" = x"yes"])
 AM_CONDITIONAL([USE_JNI], [test x"$use_jni" == x"yes"])
 AM_CONDITIONAL([USE_EXTERNAL_ASM], [test x"$use_external_asm" = x"yes"])

src/java/org/bitcoin/NativeSecp256k1.java

@@ -32,7 +32,7 @@
  * <p>You can find an example library that can be used for this at https://github.com/bitcoin/secp256k1</p>
  *
  * <p>To build secp256k1 for use with bitcoinj, run
- * `./configure --enable-jni --enable-experimental --enable-module-schnorr --enable-module-ecdh`
+ * `./configure --enable-jni --enable-experimental --enable-module-ecdh`
  * and `make` then copy `.libs/libsecp256k1.so` to your system library path
  * or point the JVM to the folder containing it with -Djava.library.path
  * </p>
@@ -417,36 +417,6 @@ public static synchronized boolean randomize(byte[] seed) throws AssertFailExcep
         }
     }
 
-    public static byte[] schnorrSign(byte[] data, byte[] sec) throws AssertFailException {
-        Preconditions.checkArgument(data.length == 32 && sec.length <= 32);
-
-        ByteBuffer byteBuff = nativeECDSABuffer.get();
-        if (byteBuff == null) {
-            byteBuff = ByteBuffer.allocateDirect(32 + 32);
-            byteBuff.order(ByteOrder.nativeOrder());
-            nativeECDSABuffer.set(byteBuff);
-        }
-        byteBuff.rewind();
-        byteBuff.put(data);
-        byteBuff.put(sec);
-
-        byte[][] retByteArray;
-
-        r.lock();
-        try {
-          retByteArray = secp256k1_schnorr_sign(byteBuff, Secp256k1Context.getContext());
-        } finally {
-          r.unlock();
-        }
-
-        byte[] sigArr = retByteArray[0];
-        int retVal = new BigInteger(new byte[] { retByteArray[1][0] }).intValue();
-
-        assertEquals(sigArr.length, 64, "Got bad signature length.");
-
-        return retVal == 0 ? new byte[0] : sigArr;
-    }
-
     private static native long secp256k1_ctx_clone(long context);
 
     private static native int secp256k1_context_randomize(ByteBuffer byteBuff, long context);
@@ -471,8 +441,6 @@ public static byte[] schnorrSign(byte[] data, byte[] sec) throws AssertFailExcep
 
     private static native byte[][] secp256k1_ec_pubkey_parse(ByteBuffer byteBuff, long context, int inputLen);
 
-    private static native byte[][] secp256k1_schnorr_sign(ByteBuffer byteBuff, long context);
-
     private static native byte[][] secp256k1_ecdh(ByteBuffer byteBuff, long context, int inputLen);
 
 }

src/java/org/bitcoin/NativeSecp256k1Test.java

@@ -167,22 +167,6 @@ public static void testRandomize() throws AssertFailException {
         assertEquals( result, true, "testRandomize");
     }
 
-    /**
-      * This tests signSchnorr() for a valid secretkey
-      */
-    public static void testSchnorrSign() throws AssertFailException{
-
-        byte[] data = BaseEncoding.base16().lowerCase().decode("CF80CD8AED482D5D1527D7DC72FCEFF84E6326592848447D2DC0B0E87DFC9A90".toLowerCase()); //sha256hash of "testing"
-        byte[] sec = BaseEncoding.base16().lowerCase().decode("67E56582298859DDAE725F972992A07C6C4FB9F62A8FFF58CE3CA926A1063530".toLowerCase());
-
-        byte[] resultArr = NativeSecp256k1.schnorrSign(data, sec);
-        String sigString = javax.xml.bind.DatatypeConverter.printHexBinary(resultArr);
-        assertEquals( sigString, "C5E929AA058B982048760422D3B563749B7D0E50C5EBD8CD2FFC23214BD6A2F1B072C13880997EBA847CF20F2F90FCE07C1CA33A890A4127095A351127F8D95F" , "testSchnorrSign");
-    }
-
-    /**
-      * This tests signSchnorr() for a valid secretkey
-      */
     public static void testCreateECDHSecret() throws AssertFailException{
 
         byte[] sec = BaseEncoding.base16().lowerCase().decode("67E56582298859DDAE725F972992A07C6C4FB9F62A8FFF58CE3CA926A1063530".toLowerCase());
@@ -216,11 +200,6 @@ public static void main(String[] args) throws AssertFailException{
         testSignPos();
         testSignNeg();
 
-        //Test Schnorr (partial support) //TODO
-        testSchnorrSign();
-        //testSchnorrVerify
-        //testSchnorrRecovery
-
         //Test privKeyTweakAdd() 1
         testPrivKeyTweakAdd_1();
 

src/java/org_bitcoin_NativeSecp256k1.c

@@ -5,7 +5,6 @@
 #include "include/secp256k1.h"
 #include "include/secp256k1_ecdh.h"
 #include "include/secp256k1_recovery.h"
-#include "include/secp256k1_schnorr.h"
 
 
 SECP256K1_API jlong JNICALL Java_org_bitcoin_NativeSecp256k1_secp256k1_1ctx_1clone
@@ -333,39 +332,6 @@ SECP256K1_API jlong JNICALL Java_org_bitcoin_NativeSecp256k1_secp256k1_1ecdsa_1p
   return 0;
 }
 
-SECP256K1_API jobjectArray JNICALL Java_org_bitcoin_NativeSecp256k1_secp256k1_1schnorr_1sign
-  (JNIEnv* env, jclass classObject, jobject byteBufferObject, jlong ctx_l)
-{
-  secp256k1_context *ctx = (secp256k1_context*)(uintptr_t)ctx_l;
-  unsigned char* data = (unsigned char*) (*env)->GetDirectBufferAddress(env, byteBufferObject);
-  unsigned char* secKey = (unsigned char*) (data + 32);
-
-  jobjectArray retArray;
-  jbyteArray sigArray, intsByteArray;
-  unsigned char intsarray[1];
-  unsigned char sig[64];
-
-  int ret = secp256k1_schnorr_sign(ctx, sig, data, secKey, NULL, NULL);
-
-  intsarray[0] = ret;
-
-  retArray = (*env)->NewObjectArray(env, 2,
-    (*env)->FindClass(env, "[B"),
-    (*env)->NewByteArray(env, 1));
-
-  sigArray = (*env)->NewByteArray(env, 64);
-  (*env)->SetByteArrayRegion(env, sigArray, 0, 64, (jbyte*)sig);
-  (*env)->SetObjectArrayElement(env, retArray, 0, sigArray);
-
-  intsByteArray = (*env)->NewByteArray(env, 1);
-  (*env)->SetByteArrayRegion(env, intsByteArray, 0, 1, (jbyte*)intsarray);
-  (*env)->SetObjectArrayElement(env, retArray, 1, intsByteArray);
-
-  (void)classObject;
-
-  return retArray;
-}
-
 SECP256K1_API jobjectArray JNICALL Java_org_bitcoin_NativeSecp256k1_secp256k1_1ecdh
   (JNIEnv* env, jclass classObject, jobject byteBufferObject, jlong ctx_l, jint publen)
 {