basic common app packages

crypto/hash.go

@@ -0,0 +1,27 @@
+package crypto
+
+import (
+	"crypto/md5"
+	"crypto/sha256"
+	"encoding/hex"
+)
+
+// MD5 is generally faster to compute than SHA-256
+func MD5(b []byte) string {
+	hash := md5.Sum(b)
+	return hex.EncodeToString(hash[:])
+}
+
+/*
+func MD5Int(b []byte) uint64 {
+	n := new(big.Int)
+	n.SetString(MD5(b), 16)
+	return n.Uint64()
+}
+*/
+
+// SHA256 Sum256 is generally preferred over md5.hash due to its superior security and resistance to collision attacks
+func SHA256(b []byte) string {
+	hash := sha256.Sum256(b)
+	return hex.EncodeToString(hash[:])
+}