Set both key generation and ECDSA nonce to use mixed entropy

* Move random entropy functions to new package randentropy
* Add function to get n bytes entropy where up to first 32
  bytes are mixed with OS entropy sources

1 files changed, 3 insertions, 2 deletions

diff --git a/crypto/secp256k1/secp256.go b/crypto/secp256k1/secp256.go
index c01598b84..c1e37629e 100644
--- a/crypto/secp256k1/secp256.go
+++ b/crypto/secp256k1/secp256.go
@@ -15,6 +15,7 @@ import "C"
 import (
 	"bytes"
 	"errors"
+	"github.com/ethereum/go-ethereum/crypto/randentropy"
 	"unsafe"
 )
 
@@ -68,7 +69,7 @@ func GenerateKeyPair() ([]byte, []byte) {
 	const seckey_len = 32
 
 	var pubkey []byte = make([]byte, pubkey_len)
-	var seckey []byte = RandByte(seckey_len)
+	var seckey []byte = randentropy.GetEntropyMixed(seckey_len)
 
 	var pubkey_ptr *C.uchar = (*C.uchar)(unsafe.Pointer(&pubkey[0]))
 	var seckey_ptr *C.uchar = (*C.uchar)(unsafe.Pointer(&seckey[0]))
@@ -124,7 +125,7 @@ int secp256k1_ecdsa_sign_compact(const unsigned char *msg, int msglen,
 */
 
 func Sign(msg []byte, seckey []byte) ([]byte, error) {
-	nonce := RandByte(32)
+	nonce := randentropy.GetEntropyMixed(32)
 
 	var sig []byte = make([]byte, 65)
 	var recid C.int