secp256k1 library is compiled into WASM

CMakeLists.txt

@@ -24,6 +24,9 @@ set_target_properties( crypto PROPERTIES IMPORTED_LOCATION ${CMAKE_CURRENT_SOURC
 add_library( ssl STATIC IMPORTED )
 set_target_properties( ssl PROPERTIES IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/openssl/libssl.a )
 
-target_include_directories( wasm_test PUBLIC "${CMAKE_CURRENT_SOURCE_DIR}/openssl/include" "${CMAKE_CURRENT_SOURCE_DIR}/include" ${Boost_INCLUDE_DIR} )
-target_link_libraries( wasm_test PRIVATE ssl crypto mfc embind idbfs.js ${Boost_LIBRARIES} )
+add_library( secp256k1 STATIC IMPORTED )
+set_target_properties( secp256k1 PROPERTIES IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/secp256k1-zkp/.libs/libsecp256k1.a )
+
+target_include_directories( wasm_test PUBLIC "${CMAKE_CURRENT_SOURCE_DIR}/openssl/include" "${CMAKE_CURRENT_SOURCE_DIR}/secp256k1-zkp/include" "${CMAKE_CURRENT_SOURCE_DIR}/include" ${Boost_INCLUDE_DIR} )
+target_link_libraries( wasm_test PRIVATE secp256k1 ssl crypto mfc embind idbfs.js ${Boost_LIBRARIES} )
 target_link_options( wasm_test PRIVATE "--emrun" )

README.md

@@ -12,11 +12,20 @@
 10. git submodule update --init --recursive
 11. emconfigure ./Configure linux-generic64
 12. sed -i 's|^CROSS_COMPILE.*$|CROSS_COMPILE=|g' Makefile
-13. emmake make -j 12 build_generated libssl.a libcrypto.a
+13. emmake make build_generated libssl.a libcrypto.a
 
-14. ./build.sh && ./run.sh
+14. git clone https://github.com/ElementsProject/secp256k1-zkp.git
+15. ./autogen.sh
+  #if above script fails, then try to install:
+  sudo apt-get install autoconf
+  and/or
+  sudo apt-get install libtool
+16. emconfigure ./configure
+17. emmake make
 
-15. Start a browser and open url: http://<ip>:6931/test/wasm_test.html
+18. ./build.sh && ./run.sh
+
+19. Start a browser and open url: http://<ip>:6931/test/wasm_test.html
 
 
 

src/wasm_test.cpp

@@ -8,6 +8,8 @@
 
 #include <openssl/sha.h>
 
+#include <secp256k1.h>
+
 #include <emscripten/bind.h>
 
 using namespace emscripten;
@@ -23,7 +25,17 @@ public:
     ++x;
   }
 
+  std::string test_sec256k1()
+  {
+    secp256k1_context* _ctx = secp256k1_context_create(SECP256K1_CONTEXT_VERIFY | SECP256K1_CONTEXT_SIGN);
+    std::string _result = _ctx ? "OK" : "FAIL";
+    free( _ctx );
+    return _result;
+  }
+
   void dump(std::string path) {
+    auto _context_status = test_sec256k1();
+
     SHA_CTX ctx;
     ctx.num = 12;
 
@@ -52,7 +64,8 @@ public:
     sd.doWork(path, std::string("specified path: ") + path + path_description
                 + std::string(";X has value: ") + std::to_string(x)
                 + " use SHA_CTX structure: " + std::to_string( ctx.num )
-                + " generate SHA512: " + __sha512 );
+                + " generate SHA512: " + __sha512
+                + " sec256k1 context status: " + _context_status );
   }