ethcrypto => crypto

1 files changed, 47 insertions, 0 deletions

diff --git a/crypto/crypto.go b/crypto/crypto.go
new file mode 100644
index 000000000..e10a9e81f
--- /dev/null
+++ b/crypto/crypto.go
@@ -0,0 +1,47 @@
+package crypto
+
+import (
+	"crypto/sha256"
+
+	"code.google.com/p/go.crypto/ripemd160"
+	"github.com/ethereum/go-ethereum/ethutil"
+	"github.com/obscuren/secp256k1-go"
+	"github.com/obscuren/sha3"
+)
+
+// TODO refactor, remove (bin)
+func Sha3(data []byte) []byte {
+	d := sha3.NewKeccak256()
+	d.Write(data)
+
+	return d.Sum(nil)
+}
+
+// Creates an ethereum address given the bytes and the nonce
+func CreateAddress(b []byte, nonce uint64) []byte {
+	return Sha3(ethutil.NewValue([]interface{}{b, nonce}).Encode())[12:]
+}
+
+func Sha256(data []byte) []byte {
+	hash := sha256.Sum256(data)
+
+	return hash[:]
+}
+
+func Ripemd160(data []byte) []byte {
+	ripemd := ripemd160.New()
+	ripemd.Write(data)
+
+	return ripemd.Sum(nil)
+}
+
+func Ecrecover(data []byte) []byte {
+	var in = struct {
+		hash []byte
+		sig  []byte
+	}{data[:32], data[32:]}
+
+	r, _ := secp256k1.RecoverPubkey(in.hash, in.sig)
+
+	return r
+}