-tags options is necessary fo cgo

5 files changed, 51 insertions, 9 deletions

diff --git a/Makefile b/Makefile
index f53f7b5..4847885 100644
--- a/Makefile
+++ b/Makefile
@@ -106,8 +106,17 @@ ifeq ($(OS),mac)
   MAC_GO_LDFLAGS="-ldflags=-s"
 endif
 # PATH is for mingw, LD_RUN_PATH is for linux, DYLD_LIBRARY_PATH is for mac
-test_go: ffi/go/bls/bls.go ffi/go/bls/bls_test.go $(BLS384_SLIB)
-	cd ffi/go/bls && env PATH=$$PATH:../../../lib LD_RUN_PATH="../../../lib" DYLD_LIBRARY_PATH="../../../lib" go test $(MAC_GO_LDFLAGS) .
+test_go256: ffi/go/bls/bls.go ffi/go/bls/bls_test.go $(BLS256_SLIB)
+	cd ffi/go/bls && env PATH=$$PATH:../../../lib LD_RUN_PATH="../../../lib" DYLD_LIBRARY_PATH="../../../lib" go test $(MAC_GO_LDFLAGS) -tags bn256 .
+test_go384: ffi/go/bls/bls.go ffi/go/bls/bls_test.go $(BLS384_SLIB)
+	cd ffi/go/bls && env PATH=$$PATH:../../../lib LD_RUN_PATH="../../../lib" DYLD_LIBRARY_PATH="../../../lib" go test $(MAC_GO_LDFLAGS) -tags bn384 .
+test_go384_256: ffi/go/bls/bls.go ffi/go/bls/bls_test.go $(BLS384_256_SLIB)
+	cd ffi/go/bls && env PATH=$$PATH:../../../lib LD_RUN_PATH="../../../lib" DYLD_LIBRARY_PATH="../../../lib" go test $(MAC_GO_LDFLAGS) -tags bn384_256 .
+
+test_go:
+	$(MAKE) test_go256
+	$(MAKE) test_go384
+	$(MAKE) test_go384_256
 
 EMCC_OPT=-I./include -I./src -I../mcl/include -I./ -Wall -Wextra
 EMCC_OPT+=-O3 -DNDEBUG
diff --git a/ffi/go/bls/bls.go b/ffi/go/bls/bls.go
index a7bbeb3..cb7074c 100644
--- a/ffi/go/bls/bls.go
+++ b/ffi/go/bls/bls.go
@@ -2,9 +2,13 @@ package bls
 
 /*
 #cgo CFLAGS:-I../../../include -I../../../../mcl/include/
-#cgo LDFLAGS:-L../../../lib
-#cgo CFLAGS:-DMCLBN_FP_UNIT_SIZE=6
-#cgo LDFLAGS:-lbls384_dy -lcrypto -lgmp -lgmpxx -lstdc++
+#cgo bn256 CFLAGS:-DMCLBN_FP_UNIT_SIZE=4
+#cgo bn256 LDFLAGS:-lbls256_dy
+#cgo bn384 CFLAGS:-DMCLBN_FP_UNIT_SIZE=6
+#cgo bn384 LDFLAGS:-lbls384_dy
+#cgo bn384_256 CFLAGS:-DMCLBN_FP_UNIT_SIZE=6 -DMCLBN_FR_UNIT_SIZE=4
+#cgo bn384_256 LDFLAGS:-lbls384_256_dy
+#cgo LDFLAGS:-L../../../lib -lcrypto -lgmp -lgmpxx -lstdc++
 #include <bls/bls.h>
 */
 import "C"
diff --git a/ffi/go/bls/bls_test.go b/ffi/go/bls/bls_test.go
index adc2806..bc94703 100644
--- a/ffi/go/bls/bls_test.go
+++ b/ffi/go/bls/bls_test.go
@@ -380,8 +380,10 @@ func TestMain(t *testing.T) {
 	t.Log("CurveFp254BNb")
 	test(t, CurveFp254BNb)
 	if GetMaxOpUnitSize() == 6 {
-		t.Log("CurveFp382_1")
-		test(t, CurveFp382_1)
+		if GetFrUnitSize() == 6 {
+			t.Log("CurveFp382_1")
+			test(t, CurveFp382_1)
+		}
 		t.Log("BLS12_381")
 		test(t, BLS12_381)
 	}
diff --git a/ffi/go/bls/mcl.go b/ffi/go/bls/mcl.go
index 9771201..776536f 100644
--- a/ffi/go/bls/mcl.go
+++ b/ffi/go/bls/mcl.go
@@ -1,7 +1,9 @@
 package bls
 
 /*
-#cgo CFLAGS:-DMCLBN_FP_UNIT_SIZE=6
+#cgo bn256 CFLAGS:-DMCLBN_FP_UNIT_SIZE=4
+#cgo bn384 CFLAGS:-DMCLBN_FP_UNIT_SIZE=6
+#cgo bn384_256 CFLAGS:-DMCLBN_FP_UNIT_SIZE=6 -DMCLBN_FR_UNIT_SIZE=4
 #include <mcl/bn.h>
 */
 import "C"
@@ -23,6 +25,17 @@ const BLS12_381 = C.MCL_BLS12_381
 // IoSerializeHexStr
 const IoSerializeHexStr = C.MCLBN_IO_SERIALIZE_HEX_STR
 
+// GetFrUnitSize() --
+func GetFrUnitSize() int {
+	return int(C.MCLBN_FR_UNIT_SIZE)
+}
+
+// GetFpUnitSize() --
+// same as GetMaxOpUnitSize()
+func GetFpUnitSize() int {
+	return int(C.MCLBN_FP_UNIT_SIZE)
+}
+
 // GetMaxOpUnitSize --
 func GetMaxOpUnitSize() int {
 	return int(C.MCLBN_FP_UNIT_SIZE)
diff --git a/readme.md b/readme.md
index 0130c04..42860a4 100644
--- a/readme.md
+++ b/readme.md
@@ -15,7 +15,20 @@ git clone git://github.com/herumi/bls.git
 git clone git://github.com/herumi/cybozulib_ext ; for only Windows
 ```
 
-# **REMARK** libbls.a for C++ interface(bls/bls.hpp) is removed
+# News
+* -tags options is necessary for golang binding
+    * -tags bn256
+    * -tags bn384\_256
+    * -tags bn384 ; previous version
+* Support swap of G1 and G2
+    * `make BLS_SWAP_G=1` then G1 is assigned to PublicKey and G2 is assigned to Signature.
+    * golang binding does not support this feature yet.
+* Build option without GMP
+    * `make MCL_USE_GMP=0`
+* Build option to specify `mcl` directory
+    * `make MCL_DIR=<mcl directory>`
+
+* (old) libbls.a for C++ interface(bls/bls.hpp) is removed
 Link `lib/libbls256.a` or `lib/libbls384.a` to use `bls/bls.hpp` according to MCLBN_FP_UNIT_SIZE = 4 or 6.
 
 # Build and test for Linux
@@ -47,6 +60,7 @@ bin\bls_c384_test.exe
 # Library
 * libbls256.a/libbls256_dy.so ; for BN254 compiled with MCLBN_FP_UNIT_SIZE=4
 * libbls384.a/libbls384_dy.so ; for BN254/BN381_1/BLS12_381 compiled with MCLBN_FP_UNIT_SIZE=6
+* libbls384_256.a/libbls384_256_dy.so ; for BN254/BLS12_381 compiled with MCLBN_FP_UNIT_SIZE=6 and MCLBN_FR_UNIT_SIZE=4
 
 See `mcl/include/curve_type.h` for curve parameter