gaspersic/go-ethereum
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

[release/1.3.4] parmas, crypto, core, core/vm: homestead consensus protocol changes

Browse Source 
* change gas cost for contract creating txs
* invalidate signature with s value greater than secp256k1 N / 2
* OOG contract creation if not enough gas to store code
* new difficulty adjustment algorithm
* new DELEGATECALL op code

Conflicts:
	core/vm/environment.go
	crypto/crypto.go
	crypto/secp256k1/secp256.go
	eth/api.go
This commit is contained in:
Gustav Simonsson
2015-11-27 15:40:29 +01:00
committed by Jeffrey Wilcke
parent 300f1e2abf
commit 61404979ed
54 changed files with 25877 additions and 11223 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
crypto/secp256k1/secp256.go
View File

@ -44,6 +44,7 @@ import "C"
import (
"errors"
"math/big"
"unsafe"
"github.com/ethereum/go-ethereum/crypto/randentropy"
@ -60,9 +61,17 @@ 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)