mirror of
https://github.com/HACKERALERT/Picocrypt.git
synced 2024-06-02 18:34:43 +12:00
v1.8 New Reed-Solomon feature
This commit is contained in:
Evan Su
GitHub
parent
3184895f77
commit
7559754f2d
202
src/Picocrypt.py
202
src/Picocrypt.py
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@ -1,6 +1,6 @@
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#!/usr/bin/env python3
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# Dependencies: argon2-cffi, pycryptodome
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# Dependencies: argon2-cffi, pycryptodome, reedsolo
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# Copyright (c) Evan Su (https://evansu.cc)
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# Released under a GNU GPL v3 license
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# https://github.com/HACKERALERT/Picocrypt
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@ -9,12 +9,22 @@
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try:
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from argon2.low_level import hash_secret_raw
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from Crypto.Cipher import ChaCha20_Poly1305
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try:
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from creedsolo import ReedSolomonError
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except:
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from reedsolo import ReedSolomonError
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except:
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# Libraries missing, install them
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from os import system
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system("sudo apt-get install python3-tk")
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system("python3 -m pip install argon2-cffi")
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system("python3 -m pip install pycryptodome")
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try:
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# Debian/Ubuntu based
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system("sudo apt-get install python3-tk")
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except:
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# Fedora
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system("sudo dnf install python3-tkinter")
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system("python3 -m pip install argon2-cffi --no-cache-dir")
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system("python3 -m pip install pycryptodome --no-cache-dir")
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system("python3 -m pip install reedsolo --no-cache-dir")
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# Imports
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from tkinter import filedialog,messagebox
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@ -31,6 +41,10 @@ import tkinter
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import tkinter.ttk
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import tkinter.scrolledtext
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import webbrowser
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try:
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from creedsolo import RSCodec,ReedSolomonError
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except:
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from reedsolo import RSCodec,ReedSolomonError
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# Tk/Tcl is a little barbaric, disable
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# high DPI so it doesn't look really ugly
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@ -57,11 +71,13 @@ derivingNotice = "Deriving key (takes a few seconds)..."
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keepNotice = "Keep decrypted output even if it's corrupted or modified"
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eraseNotice = "Securely erase and delete original file"
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overwriteNotice = "Output file already exists. Would you like to overwrite it?"
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rsNotice = "Prevent corruption using Reed-Solomon"
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rscNotice = "Creating Reed-Solomon tables..."
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unknownErrorNotice = "Unknown error occured. Please try again."
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# Create root Tk
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tk = tkinter.Tk()
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tk.geometry("480x420")
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tk.geometry("480x440")
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tk.title("Picocrypt")
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tk.configure(background="#f5f6f7")
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tk.resizable(0,0)
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@ -95,13 +111,14 @@ def inputSelected():
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inputFile = tmp
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# Decide if encrypting or decrypting
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if ".pcf" in inputFile.split("/")[-1]:
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suffix = " (will be decrypted)"
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suffix = " (will decrypt)"
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fin = open(inputFile,"rb+")
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# Read file metadata
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adlen = b""
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while True:
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letter = fin.read(1)
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adlen += letter
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if letter!=b"+":
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adlen += letter
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if letter==b"|":
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adlen = adlen[:-1]
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break
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@ -115,13 +132,15 @@ def inputSelected():
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adLabelString.set("File metadata (read only):")
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keepBtn["state"] = "normal"
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eraseBtn["state"] = "disabled"
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rsBtn["state"] = "disabled"
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else:
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# Update the UI
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eraseBtn["state"] = "normal"
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keepBtn["state"] = "disabled"
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rsBtn["state"] = "normal"
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adArea["state"] = "normal"
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adArea.delete("1.0",tkinter.END)
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suffix = " (will be encrypted)"
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suffix = " (will encrypt)"
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adLabelString.set(adString)
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# Enable password box, etc.
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inputString.set(inputFile.split("/")[-1]+suffix)
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@ -190,13 +209,23 @@ passwordInput["state"] = "disabled"
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# Start the encryption/decryption process
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def start():
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global inputFile,outputFile,password,ad,kept,working
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dummy.focus()
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reedsolo = False
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chunkSize = 2**20
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# Decide if encrypting or decrypting
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if ".pcf" not in inputFile:
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mode = "encrypt"
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outputFile = inputFile+".pcf"
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reedsolo = rs.get()==1
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else:
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mode = "decrypt"
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test = open(inputFile,"rb+")
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decider = test.read(1).decode("utf-8")
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test.close()
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if decider=="+":
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reedsolo = True
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print("reed solo")
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outputFile = inputFile[:-4]
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# Check if file already exists
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@ -209,6 +238,17 @@ def start():
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except:
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pass
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# Set progress bar indeterminate
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progress.config(mode="indeterminate")
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progress.start(15)
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# Create Reed-Solomon object
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if reedsolo:
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statusString.set(rscNotice)
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rsc = RSCodec(8)
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reedsoloFixedCount = 0
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reedsoloErrorCount = 0
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# Set and get some variables
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working = True
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dummy.focus()
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@ -220,10 +260,17 @@ def start():
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passwordInput["state"] = "disabled"
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adArea["state"] = "disabled"
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startBtn["state"] = "disabled"
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eraseBtn["state"] = "disabled"
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keepBtn["state"] = "disabled"
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rsBtn["state"] = "disabled"
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fin = open(inputFile,"rb+")
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if reedsolo and mode=="decrypt":
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fin.read(1)
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fout = open(outputFile,"wb+")
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if reedsolo and mode=="encrypt":
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print("Write +")
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fout.write(b"+")
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# Generate values for encryption if encrypting
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if mode=="encrypt":
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@ -254,17 +301,15 @@ def start():
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salt = fin.read(16)
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nonce = fin.read(24)
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# Show notice, set progress bar indeterminate
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# Show notice about key derivation
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statusString.set(derivingNotice)
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progress.config(mode="indeterminate")
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progress.start(15)
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# Derive argon2id key
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key = hash_secret_raw(
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password,
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salt,
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time_cost=8, # 8 iterations
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memory_cost=2**20, # 2^20 Kilobytes (1GB)
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memory_cost=2**20, # 2^20 Kibibytes (1GiB)
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parallelism=8, # 8 parallel threads
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hash_len=32,
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type=Type.ID
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@ -291,6 +336,7 @@ def start():
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adArea["state"] = "normal"
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startBtn["state"] = "normal"
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keepBtn["state"] = "normal"
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rsBtn["state"] = "normal"
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working = False
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del key
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return
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@ -302,7 +348,6 @@ def start():
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done = 0
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total = getsize(inputFile)
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chunkSize = 2**20
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startTime = datetime.now()
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# If secure wipe enabled, create a wiper object
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@ -312,7 +357,11 @@ def start():
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# Continously read file in chunks of 1MB
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while True:
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piece = fin.read(chunkSize)
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if mode=="decrypt" and reedsolo:
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# Read the piece and Reed-Solomon recovery bytes
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piece = fin.read(1082544)
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else:
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piece = fin.read(chunkSize)
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if wipe:
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# If securely wipe, write random trash
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# to original file after reading it
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@ -326,7 +375,8 @@ def start():
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fout.flush()
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fout.close()
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fout = open(outputFile,"r+b")
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fout.seek(len(str(len(ad)))+1+len(ad))
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rsOffset = 1 if reedsolo else 0
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fout.seek(len(str(len(ad)))+1+len(ad)+rsOffset)
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fout.write(check)
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fout.write(crc.digest())
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fout.write(digest)
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@ -339,7 +389,7 @@ def start():
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progress["value"] = 100
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fin.close()
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fout.close()
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# If keep file checked...
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# If keep file not checked...
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if keep.get()!=1:
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remove(outputFile)
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selectFileInput["state"] = "normal"
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@ -347,6 +397,7 @@ def start():
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adArea["state"] = "normal"
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startBtn["state"] = "normal"
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keepBtn["state"] = "normal"
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rsBtn["state"] = "normal"
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working = False
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del fin,fout,cipher,key
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return
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@ -356,33 +407,69 @@ def start():
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# Throws ValueError if incorrect
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cipher.verify(digest)
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except:
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# File is modified
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statusString.set(modifiedNotice)
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progress["value"] = 100
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fin.close()
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fout.close()
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# If keep file checked...
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if keep.get()!=1:
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remove(outputFile)
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selectFileInput["state"] = "normal"
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passwordInput["state"] = "normal"
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adArea["state"] = "normal"
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startBtn["state"] = "normal"
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keepBtn["state"] = "normal"
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working = False
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del fin,fout,cipher,key
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return
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else:
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kept = "modified"
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if not reedsoloErrorCount:
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# File is modified
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statusString.set(modifiedNotice)
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progress["value"] = 100
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fin.close()
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fout.close()
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# If keep file not checked...
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if keep.get()!=1:
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remove(outputFile)
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selectFileInput["state"] = "normal"
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passwordInput["state"] = "normal"
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adArea["state"] = "normal"
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startBtn["state"] = "normal"
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keepBtn["state"] = "normal"
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rsBtn["state"] = "normal"
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working = False
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del fin,fout,cipher,key
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return
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else:
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kept = "modified"
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break
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# Encrypt/decrypt chunk and update CRC
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if mode=="encrypt":
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data = cipher.encrypt(piece)
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crc.update(data)
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if reedsolo:
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data = bytes(rsc.encode(data))
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else:
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crc.update(piece)
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data = cipher.decrypt(piece)
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if reedsolo:
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try:
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data,_,fixed = rsc.decode(piece)
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except ReedSolomonError:
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# File is really corrupted
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if not reedsoloErrorCount:
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statusString.set(corruptedNotice)
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progress["value"] = 100
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# If keep file not checked...
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if keep.get()!=1:
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fin.close()
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fout.close()
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remove(outputFile)
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selectFileInput["state"] = "normal"
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passwordInput["state"] = "normal"
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adArea["state"] = "normal"
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startBtn["state"] = "normal"
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keepBtn["state"] = "normal"
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rsBtn["state"] = "normal"
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working = False
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del fin,fout,cipher,key
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return
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else:
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kept = "corrupted"
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data = piece[:2**20]
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fixed = bytearray()
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reedsoloErrorCount += 1
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data = bytes(data)
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reedsoloFixedCount += len(fixed)
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crc.update(data)
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data = cipher.decrypt(data)
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else:
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crc.update(piece)
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data = cipher.decrypt(piece)
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# Calculate speed, ETA, etc.
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first = False
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@ -396,12 +483,18 @@ def start():
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if speed==0:
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first = True
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speed = 0.1**6
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rSpeed = round(speed)
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rSpeed = round(speed,2)
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eta = round((total-done)/(speed*10**6))
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if eta>=60:
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eta = f"{eta//60}m {eta%60}"
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if first:
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statusString.set("...% at ... MB/s (ETA: ...s)")
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else:
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info = f"{rPercent}% at {rSpeed} MB/s (ETA: {eta}s)"
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if reedsolo and mode=="decrypt" and reedsoloFixedCount:
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info += f", fixed {reedsoloFixedCount} corrupted bytes"
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if reedsolo and mode=="decrypt" and reedsoloErrorCount:
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info += f", {reedsoloErrorCount} MB unrecoverable"
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statusString.set(info)
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done += chunkSize
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@ -414,6 +507,9 @@ def start():
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else:
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output = inputFile.split("/")[-1].replace(".pcf","")
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statusString.set(f"Completed. (Output: {output})")
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if mode=="decrypt" and reedsolo and reedsoloFixedCount:
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statusString.set(f"Completed with {reedsoloFixedCount} bytes fixed."+
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f" (Output: {output})")
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else:
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if kept=="modified":
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statusString.set(kModifiedNotice)
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@ -437,6 +533,8 @@ def start():
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eraseBtn["state"] = "normal"
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erase.set(0)
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eraseBtn["state"] = "disabled"
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rs.set(0)
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rsBtn["state"] = "disabled"
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if not kept:
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fout.flush()
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fsync(fout.fileno())
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@ -463,12 +561,15 @@ def wrapper():
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# Try start() and handle errors
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try:
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start()
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except:
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except Exception as e:
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print(e)
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progress["value"] = 100
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selectFileInput["state"] = "normal"
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passwordInput["state"] = "normal"
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adArea["state"] = "normal"
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startBtn["state"] = "normal"
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keepBtn["state"] = "normal"
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rsBtn["state"] = "normal"
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statusString.set(unknownErrorNotice)
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dummy.focus()
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working = False
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@ -537,13 +638,26 @@ eraseBtn = tkinter.ttk.Checkbutton(
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eraseBtn.place(x=18,y=260)
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eraseBtn["state"] = "disabled"
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# Check box for Reed Solomon
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rs = tkinter.IntVar()
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rsBtn = tkinter.ttk.Checkbutton(
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tk,
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text=rsNotice,
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variable=rs,
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onvalue=1,
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offvalue=0,
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command=lambda:dummy.focus()
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)
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rsBtn.place(x=18,y=280)
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rsBtn["state"] = "disabled"
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# Frame so start button can fill width
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startFrame = tkinter.Frame(
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tk,
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width=442,
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height=25
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)
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startFrame.place(x=19,y=290)
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startFrame.place(x=19,y=310)
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startFrame.columnconfigure(0,weight=10)
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startFrame.grid_propagate(False)
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# Start button
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@ -562,7 +676,7 @@ progress = tkinter.ttk.Progressbar(
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length=440,
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mode="determinate"
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)
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progress.place(x=20,y=328)
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progress.place(x=20,y=348)
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# Status label
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statusString = tkinter.StringVar(tk)
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@ -571,7 +685,7 @@ status = tkinter.ttk.Label(
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tk,
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textvariable=statusString
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)
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status.place(x=17,y=356)
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status.place(x=17,y=376)
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status.config(background="#f5f6f7")
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# Credits :)
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@ -585,20 +699,20 @@ credits = tkinter.ttk.Label(
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)
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credits["state"] = "disabled"
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credits.config(background="#f5f6f7")
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credits.place(x=17,y=386)
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credits.place(x=17,y=406)
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source = "https://github.com/HACKERALERT/Picocrypt"
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credits.bind("<Button-1>",lambda e:webbrowser.open(source))
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# Version
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versionString = tkinter.StringVar(tk)
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versionString.set("v1.7")
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versionString.set("v1.8")
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version = tkinter.ttk.Label(
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tk,
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textvariable=versionString
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)
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version["state"] = "disabled"
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version.config(background="#f5f6f7")
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version.place(x=436,y=386)
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version.place(x=436,y=406)
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# Dummy button to remove focus from other buttons
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# and prevent ugly border highlighting
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