diff options
Diffstat (limited to 'crypto/secp256k1/secp256.go')
| -rw-r--r-- | crypto/secp256k1/secp256.go | 24 |
1 files changed, 21 insertions, 3 deletions
diff --git a/crypto/secp256k1/secp256.go b/crypto/secp256k1/secp256.go index 41a5608a5..8dc248145 100644 --- a/crypto/secp256k1/secp256.go +++ b/crypto/secp256k1/secp256.go @@ -20,6 +20,7 @@ package secp256k1 /* #cgo CFLAGS: -I./libsecp256k1 +#cgo CFLAGS: -I./libsecp256k1/src/ #cgo darwin CFLAGS: -I/usr/local/include #cgo freebsd CFLAGS: -I/usr/local/include #cgo linux,arm CFLAGS: -I/usr/local/arm/include @@ -35,6 +36,7 @@ package secp256k1 #define NDEBUG #include "./libsecp256k1/src/secp256k1.c" #include "./libsecp256k1/src/modules/recovery/main_impl.h" +#include "pubkey_scalar_mul.h" typedef void (*callbackFunc) (const char* msg, void* data); extern void secp256k1GoPanicIllegal(const char* msg, void* data); @@ -44,6 +46,7 @@ import "C" import ( "errors" + "math/big" "unsafe" "github.com/ethereum/go-ethereum/crypto/randentropy" @@ -56,13 +59,16 @@ import ( > store private keys in buffer and shuffle (deters persistance on swap disc) > byte permutation (changing) > xor with chaning random block (to deter scanning memory for 0x63) (stream cipher?) - > on disk: store keys in wallets */ // holds ptr to secp256k1_context_struct (see secp256k1/include/secp256k1.h) -var context *C.secp256k1_context +var ( + context *C.secp256k1_context + N *big.Int +) func init() { + N, _ = new(big.Int).SetString("fffffffffffffffffffffffffffffffebaaedce6af48a03bbfd25e8cd0364141", 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) @@ -78,7 +84,6 @@ var ( func GenerateKeyPair() ([]byte, []byte) { var seckey []byte = randentropy.GetEntropyCSPRNG(32) var seckey_ptr *C.uchar = (*C.uchar)(unsafe.Pointer(&seckey[0])) - var pubkey64 []byte = make([]byte, 64) // secp256k1_pubkey var pubkey65 []byte = make([]byte, 65) // 65 byte uncompressed pubkey pubkey64_ptr := (*C.secp256k1_pubkey)(unsafe.Pointer(&pubkey64[0])) @@ -254,3 +259,16 @@ func checkSignature(sig []byte) error { } return nil } + +// reads num into buf as big-endian bytes. +func readBits(buf []byte, num *big.Int) { + const wordLen = int(unsafe.Sizeof(big.Word(0))) + i := len(buf) + for _, d := range num.Bits() { + for j := 0; j < wordLen && i > 0; j++ { + i-- + buf[i] = byte(d) + d >>= 8 + } + } +} |