Add code generating data/sighash.json test data

Author: maraoz

src/test/sighash_tests.cpp

@@ -114,11 +114,21 @@ void static RandomTransaction(CTransaction &tx, bool fSingle) {
 }
 
 BOOST_AUTO_TEST_SUITE(sighash_tests)
+
 BOOST_AUTO_TEST_CASE(sighash_test)
 {
     seed_insecure_rand(false);
-
-    for (int i=0; i<50000; i++) {
+  
+    #if defined(PRINT_SIGHASH_JSON)
+    std::cout << "[\n";
+    std::cout << "\t[\"raw_transaction, script, input_index, hashType, signature_hash (result)\"],\n";
+    #endif
+    int nRandomTests = 50000;
+
+    #if defined(PRINT_SIGHASH_JSON)
+    nRandomTests = 500;
+    #endif
+    for (int i=0; i<nRandomTests; i++) {
         int nHashType = insecure_rand();
         CTransaction txTo;
         RandomTransaction(txTo, (nHashType & 0x1f) == SIGHASH_SINGLE);
@@ -129,12 +139,29 @@ BOOST_AUTO_TEST_CASE(sighash_test)
         uint256 sh, sho;
         sho = SignatureHashOld(scriptCode, txTo, nIn, nHashType);
         sh = SignatureHash(scriptCode, txTo, nIn, nHashType);
+        #if defined(PRINT_SIGHASH_JSON)
+        CDataStream ss(SER_NETWORK, PROTOCOL_VERSION);
+        ss << txTo;
+
+        std::cout << "\t[\"" ;
+        std::cout << HexStr(ss.begin(), ss.end()) << "\", \"";
+        std::cout << HexStr(scriptCode) << "\", ";
+        std::cout << nIn << ", ";
+        std::cout << nHashType << ", \"";
+        std::cout << sho.GetHex() << "\"]";
+        if (i+1 != nRandomTests) {
+          std::cout << ",";
+        }
+        std::cout << "\n";
+        #endif
         BOOST_CHECK(sh == sho);
     }
+    #if defined(PRINT_SIGHASH_JSON)
+    std::cout << "]\n";
+    #endif
 }
 
 // Goal: check that SignatureHash generates correct hash
-
 BOOST_AUTO_TEST_CASE(sighash_from_data)
 {
     Array tests = read_json(std::string(json_tests::sighash, json_tests::sighash + sizeof(json_tests::sighash)));