mirror of
https://github.com/Ne0nd0g/merlin-agent
synced 2026-06-08 11:59:41 +00:00
Russel Van Tuyl
76 lines
2.3 KiB
Go
76 lines
2.3 KiB
Go
/*
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Merlin is a post-exploitation command and control framework.
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This file is part of Merlin.
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Copyright (C) 2024 Russel Van Tuyl
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Merlin is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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any later version.
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Merlin is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Merlin. If not, see <http://www.gnu.org/licenses/>.
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*/
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// Package core contains pieces of information or functions needed across the entire application
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package core
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import (
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// Standard
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"math/rand"
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"sync"
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"time"
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)
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// Global Variables
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// Verbose indicates if the agent should write messages to STDOUT
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var Verbose = false
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// Debug is used to troubleshoot problems and results in very detailed information being displayed on STDOUT
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var Debug = false
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// Version is the Merlin Agent's version number
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var Version = "2.4.3"
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// Build is the build number of the Merlin Agent program set at compile time
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var Build = "nonRelease"
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// Mutex is used to ensure exclusive access to STDOUT & STDERR
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var Mutex = &sync.Mutex{}
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var src = rand.NewSource(time.Now().UnixNano())
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// Constants
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const (
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letterIdxBits = 6 // 6 bits to represent a letter index
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letterIdxMask = 1<<letterIdxBits - 1 // All 1-bits, as many as letterIdxBits
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letterIdxMax = 63 / letterIdxBits // # of letter indices fitting in 63 bits
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letterBytes = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
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)
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// RandStringBytesMaskImprSrc generates and returns a random string of n characters long
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func RandStringBytesMaskImprSrc(n int) string {
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// http://stackoverflow.com/questions/22892120/how-to-generate-a-random-string-of-a-fixed-length-in-golang
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b := make([]byte, n)
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// A src.Int63() generates 63 random bits, enough for letterIdxMax characters!
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for i, cache, remain := n-1, src.Int63(), letterIdxMax; i >= 0; {
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if remain == 0 {
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cache, remain = src.Int63(), letterIdxMax
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}
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if idx := int(cache & letterIdxMask); idx < len(letterBytes) {
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b[i] = letterBytes[idx]
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i--
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}
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cache >>= letterIdxBits
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remain--
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}
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return string(b)
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}
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