Initial commit - secure RandomStringGenerator implementation

SnowcloakUtils.go

@@ -0,0 +1,26 @@
+package SnowcloakUtils
+
+import (
+	"crypto/rand" // Probably better than math/rand for this
+	"log"
+)
+
+func GenerateRandomString(length int) string {
+	// C# had optional parameters that allowed lowercase for chardata and gpose lobbies, Go doesn't.
+	// We can probably get away with just uppercase.
+	allowedArray := []rune("ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")
+	random := make([]byte, length)
+	_, err := rand.Read(random)
+	if err != nil {
+		log.Fatalf("Couldn't generate secure slice: %s", err)
+	}
+	allowedLength := len(allowedArray)
+	i := 0
+	charArray := make([]rune, length)
+	for i < length {
+		charArray[i] = allowedArray[int(random[i])%allowedLength] // Casting random[i] due to type mismatch
+		i++
+	}
+
+	return string(charArray)
+}