Merge pull request #38 from ethereumjs/bn128-update

Update upstream ethereum-bn128

.cargo/config

@@ -3,4 +3,5 @@
 rustflags = [
   "-Clink-args=-s NO_DYNAMIC_EXECUTION=1",
   "-Clink-args=-s NODEJS_CATCH_EXIT=0",
+  "-Clink-args=-s EXTRA_EXPORTED_RUNTIME_METHODS=['cwrap']",
 ]

Cargo.toml

@@ -7,6 +7,5 @@ authors = ["holgerd77 <[email protected]>",
 publish = false
 
 [dependencies]
-ethereum-bn128 = { git = "https://github.com/ewasm/ethereum-bn128.rs" }
-parity-bytes = { git = "https://github.com/paritytech/parity-common" }
+ethereum-bn128 = { git = "https://github.com/ewasm/ethereum-bn128.rs", version = "0.1.0" }
 rustc-hex = "1.0"

Makefile

@@ -4,13 +4,13 @@ all:
 	cargo build --target=asmjs-unknown-emscripten --release
 	mkdir -p lib
 	find target/asmjs-unknown-emscripten/release -type f -name "rustbn-js.js" | xargs -I {} cp {} lib/index.asm.js
-	@res=$$(sed -n '/run()$$/p' lib/index.asm.js | wc -l); \
+	@res=$$(sed -n '/run();$$/p' lib/index.asm.js | wc -l); \
 	if [ $$res == "0" ]; then \
 		echo "ERROR: could not find run() function in generated code"; \
 		exit 1; \
 	fi\
 
-	sed -ibak 's/run()$$/Module\["arguments"\]=\[\];run();module\.exports=Module;/' lib/index.asm.js
+	sed -ibak 's/run();$$/Module\["arguments"\]=\[\];run();module\.exports=Module;/' lib/index.asm.js
 
 wasm:
 	cargo build --target=wasm32-unknown-emscripten --release

src/main.rs

@@ -1,5 +1,4 @@
 extern crate ethereum_bn128;
-extern crate parity_bytes as bytes;
 extern crate rustc_hex;
 
 use std::ffi::CStr;
@@ -8,16 +7,14 @@ use std::os::raw::c_char;
 use rustc_hex::FromHex;
 use rustc_hex::ToHex;
 
-use bytes::BytesRef;
-
 #[no_mangle]
 pub fn ec_mul(input_hex_ptr: *const c_char) -> *const c_char {
     let input_hex = unsafe { CStr::from_ptr(input_hex_ptr) };
     let input_str: &str = input_hex.to_str().unwrap();
     let input_parsed = FromHex::from_hex(input_str).unwrap();
 
-    let mut output = vec![0u8; 64];
-    match ethereum_bn128::bn128_mul(&input_parsed[..], &mut BytesRef::Fixed(&mut output[..])) {
+    let mut output = [0u8; 64];
+    match ethereum_bn128::bn128_mul(&input_parsed[..], &mut output) {
         Ok(_) => {
             let mut output_hex = output.to_hex();
             output_hex.push_str("\0");
@@ -33,8 +30,8 @@ pub fn ec_add(input_hex_ptr: *const c_char) -> *const c_char {
     let input_str: &str = input_hex.to_str().unwrap();
     let input_parsed = FromHex::from_hex(input_str).unwrap();
 
-    let mut output = vec![0u8; 64];
-    match ethereum_bn128::bn128_add(&input_parsed[..], &mut BytesRef::Fixed(&mut output[..])) {
+    let mut output = [0u8; 64];
+    match ethereum_bn128::bn128_add(&input_parsed[..], &mut output) {
         Ok(_) => {
             let mut output_hex = output.to_hex();
             output_hex.push_str("\0");
@@ -50,8 +47,8 @@ pub fn ec_pairing(input_hex_ptr: *const c_char) -> *const c_char {
     let input_str: &str = input_hex.to_str().unwrap();
     let input_parsed = FromHex::from_hex(input_str).unwrap();
 
-    let mut output = vec![0u8; 32];
-    match ethereum_bn128::bn128_pairing(&input_parsed[..], &mut BytesRef::Fixed(&mut output[..])) {
+    let mut output = [0u8; 32];
+    match ethereum_bn128::bn128_pairing(&input_parsed[..], &mut output) {
         Ok(_) => {
             let mut output_hex = output.to_hex();
             output_hex.push_str("\0");