diff options
Diffstat (limited to 'crypto/secp256k1/secp256.go')
| -rw-r--r-- | crypto/secp256k1/secp256.go | 21 |
1 files changed, 12 insertions, 9 deletions
diff --git a/crypto/secp256k1/secp256.go b/crypto/secp256k1/secp256.go index 41a5608a5..83f2a5f26 100644 --- a/crypto/secp256k1/secp256.go +++ b/crypto/secp256k1/secp256.go @@ -20,14 +20,8 @@ package secp256k1 /* #cgo CFLAGS: -I./libsecp256k1 -#cgo darwin CFLAGS: -I/usr/local/include -#cgo freebsd CFLAGS: -I/usr/local/include -#cgo linux,arm CFLAGS: -I/usr/local/arm/include -#cgo LDFLAGS: -lgmp -#cgo darwin LDFLAGS: -L/usr/local/lib -#cgo freebsd LDFLAGS: -L/usr/local/lib -#cgo linux,arm LDFLAGS: -L/usr/local/arm/lib -#define USE_NUM_GMP +#cgo CFLAGS: -I./libsecp256k1/src/ +#define USE_NUM_NONE #define USE_FIELD_10X26 #define USE_FIELD_INV_BUILTIN #define USE_SCALAR_8X32 @@ -44,6 +38,7 @@ import "C" import ( "errors" + "math/big" "unsafe" "github.com/ethereum/go-ethereum/crypto/randentropy" @@ -60,9 +55,17 @@ import ( */ // holds ptr to secp256k1_context_struct (see secp256k1/include/secp256k1.h) -var context *C.secp256k1_context +var ( + context *C.secp256k1_context + N *big.Int + HalfN *big.Int +) func init() { + N, _ = new(big.Int).SetString("fffffffffffffffffffffffffffffffebaaedce6af48a03bbfd25e8cd0364141", 16) + // N / 2 == 57896044618658097711785492504343953926418782139537452191302581570759080747168 + HalfN, _ = new(big.Int).SetString("7fffffffffffffffffffffffffffffff5d576e7357a4501ddfe92f46681b20a0", 16) + // around 20 ms on a modern CPU. context = C.secp256k1_context_create(3) // SECP256K1_START_SIGN | SECP256K1_START_VERIFY C.secp256k1_context_set_illegal_callback(context, C.callbackFunc(C.secp256k1GoPanicIllegal), nil) |