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| author | Jeffrey Wilcke <jeffrey@ethereum.org> | 2016-02-29 22:05:37 +0800 |
|---|---|---|
| committer | Jeffrey Wilcke <jeffrey@ethereum.org> | 2016-02-29 22:05:37 +0800 |
| commit | 4044a8cea44cd4cee3a8ddaf51a76b71c9d22042 (patch) | |
| tree | 1aa3776381e8e117b66e4a8ed1bf83e29d966ff1 /crypto/secp256k1 | |
| parent | c541b38fb36587d23c60f5e2f2b9b3c8700ec489 (diff) | |
| parent | 61be63bb9b8527bb3e2357ad35a0f4ef29304da1 (diff) | |
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Merge pull request #2258 from obscuren/release/1.3.4v1.3.4
Homestead Release Candidate
Diffstat (limited to 'crypto/secp256k1')
| -rw-r--r-- | crypto/secp256k1/README.md | 25 | ||||
| -rw-r--r-- | crypto/secp256k1/secp256.go | 21 |
2 files changed, 12 insertions, 34 deletions
diff --git a/crypto/secp256k1/README.md b/crypto/secp256k1/README.md deleted file mode 100644 index 5a86147d4..000000000 --- a/crypto/secp256k1/README.md +++ /dev/null @@ -1,25 +0,0 @@ -secp256k1-go -======= - -golang secp256k1 library - -Implements cryptographic operations for the secp256k1 ECDSA curve used by Bitcoin. - -Installing -=== - -GMP library headers are required to build. On Debian-based systems, the package is called `libgmp-dev`. - -``` -sudo apt-get install libgmp-dev -``` - -Now compiles with cgo! - -Test -=== - -To run tests do -``` -go tests -```
\ No newline at end of file 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) |