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added work on faster and safer database for blocks and general KV

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Kevin Froman 2020-12-30 06:48:59 +00:00
parent 0fb5e5df10
commit db7bf4f994
18 changed files with 1791 additions and 1 deletions
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src/filepaths/__init__.py
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@ -36,3 +36,5 @@ log_file = home + 'onionr.log'
ephemeral_services_file = home + 'ephemeral-services.list'
restarting_indicator = home + "is-restarting"
secure_erase_key_file = home + "erase-key"

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{
// Use IntelliSense to find out which attributes exist for C# debugging
// Use hover for the description of the existing attributes
// For further information visit https://github.com/OmniSharp/omnisharp-vscode/blob/master/debugger-launchjson.md
"version": "0.2.0",
"configurations": [
{
"name": ".NET Core Launch (console)",
"type": "coreclr",
"request": "launch",
"preLaunchTask": "build",
// If you have changed target frameworks, make sure to update the program path.
"program": "${workspaceFolder}/tests/bin/Debug/netcoreapp3.1/tests.dll",
"args": [],
"cwd": "${workspaceFolder}/tests",
// For more information about the 'console' field, see https://aka.ms/VSCode-CS-LaunchJson-Console
"console": "internalConsole",
"stopAtEntry": false
},
{
"name": ".NET Core Attach",
"type": "coreclr",
"request": "attach",
"processId": "${command:pickProcess}"
}
]
}

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src/rinseoff/.vscode/tasks.json vendored Normal file
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{
"version": "2.0.0",
"tasks": [
{
"label": "build",
"command": "dotnet",
"type": "process",
"args": [
"build",
"${workspaceFolder}/tests/tests.csproj",
"/property:GenerateFullPaths=true",
"/consoleloggerparameters:NoSummary"
],
"problemMatcher": "$msCompile"
},
{
"label": "publish",
"command": "dotnet",
"type": "process",
"args": [
"publish",
"${workspaceFolder}/tests/tests.csproj",
"/property:GenerateFullPaths=true",
"/consoleloggerparameters:NoSummary"
],
"problemMatcher": "$msCompile"
},
{
"label": "watch",
"command": "dotnet",
"type": "process",
"args": [
"watch",
"run",
"${workspaceFolder}/tests/tests.csproj",
"/property:GenerateFullPaths=true",
"/consoleloggerparameters:NoSummary"
],
"problemMatcher": "$msCompile"
}
]
}

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src/rinseoff/LICENSE.txt Normal file
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@ -0,0 +1,661 @@
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<https://www.gnu.org/licenses/>.

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<h1 align="center">RinseOff</h1>
RinseOff is a simple CLI utility written in C# to store data to a file and encrypt it using a keyfile.
The name doesn't make a lot of sense, but it means you can "rinse" your data off by just overwriting a 32 byte key file instead of the normal "scrub" process of 1 or more passes over many files.
It is mainly intended for scripts/apps to use. In the future I may make a FUSE wrapper so users can drop files into it.
Internally it uses libsodium's secretbox and stores a unique nonce alongside the 32 byte key.
# Build
Build a standalone binary (change [runtime based on system](https://docs.microsoft.com/en-us/dotnet/core/rid-catalog)):
`$ dotnet publish -p:PublishSingleFile=true --self-contained --runtime linux-x64`
The binary will be somewhere like bin/Debug/[dotnet version]/[runtime version]/publish/rinseoffcli
You can make a smaller binary by not bundling the runtime.
Or you can just "run" the project file: `$ dotnet run --project rinseoffcli`
# Usage
## Generate your key file
`$ rinseoffcli keygen /path/to/key`
Store your key somewhere it can be securely erased (not flash storage if you can help it) [security.stackexchange.com/a/62591](https://security.stackexchange.com/a/62591)
Be sure to make it accessible only to your user.
## Encrypt your data
`$ rinseoffcli store /path/to/output /path/to/key`
Then input the data to store through stdin.
## Load your data
`$ rinseoffcli load /path/to/stored/data /path/to/key`
If the key is valid, the plaintext will be outputted through stdout.
## Securely erase data
`$ shred /path/to/key`
`$ rm /path/to/datafile`
# Warnings:
The point of this utility is to help with defense in depth and to be better than nothing.
**This does not hold up to serious data recovery experts who could quite possibly recover your key file**
If the OS pages or swaps your plaintext or duplicates your key, you are probably doomed.

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using System;
using Sodium;
using System.IO;
using System.Collections.Generic;
/*
RinseOff - Encrypt or load data with a key file to help with secure erasure
Copyright (C) <2020> Kevin Froman
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
namespace rinseoff
{
public class RinseOff
{
public static void generateKeyFile(string path){
var key = Sodium.SodiumCore.GetRandomBytes(32);
File.WriteAllBytes(path, key);
}
public static byte[] encrypt_secret_bytes(byte[] secret, byte[] key){
byte[] nonce = Sodium.SecretBox.GenerateNonce();
var ciphertext = SecretBox.Create(secret, nonce, key);
var combined = new List<byte>();
combined.AddRange(nonce);
combined.AddRange(ciphertext);
return combined.ToArray();
}
public static byte[] decrypt_secret_bytes(byte[] ciphertext, byte[] key){
var ciphertextList = new List<byte>();
ciphertextList.AddRange(ciphertext);
return Sodium.SecretBox.Open(
ciphertextList.GetRange(24, ciphertextList.Count - 24).ToArray(),
ciphertextList.GetRange(0, 24).ToArray(),
key);
}
}
}

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<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<TargetFramework>net5.0</TargetFramework>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="Sodium.Core" Version="1.2.3" />
</ItemGroup>
</Project>

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src/rinseoff/rinseoffcli/RinseOffCLI.cs Normal file
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using System;
using System.IO;
using System.Collections.Generic;
using rinseoff;
/*
RinseOff - Encrypt or load data with a key file to help with secure erasure
Copyright (C) <2020> Kevin Froman
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
namespace rinseoffcli
{
class Program
{
public static string version = "1.0.0";
enum ErrorCode : byte
{
// Exit error codes indexed from 1
InvaildArgs = 1,
NoDataFileFound,
NoPermissionToReadDataFile,
FailedToReadDataFile,
FailedToWriteDataFile,
InvalidKeyFileSize,
InvalidKeyFile,
KeyFileNotFound,
NoPermissionToWriteKeyFile,
FailedToReadKeyFile,
FailedToWriteKeyFile
}
static void showHelp(ErrorCode exitCode = ErrorCode.InvaildArgs){
Console.WriteLine("RinseOff " + version + " High level secure-erasure utility");
Console.WriteLine("For stdout output, specify 'stdout' as the data file for the store command");
Console.WriteLine("Must specify keygen <key path> or store/load, then a file name followed by a key file.\nFormat: <verb> <data file> <key file>");
Environment.Exit((int) exitCode);
}
static void validateArgCount(string[] args, int count){
if (args.Length != count){
stderrWrite("Invalid number of arguments");
showHelp(ErrorCode.InvaildArgs);
}
}
static void stderrWrite(string msg){
var stderrStream = Console.Error;
stderrStream.WriteLine(msg);
stderrStream.Flush();
}
static void loadData(string filepath, string keypath){
// Load in an encrypted file and use a key file to decrypt it, then log bytes back to stdout
byte[] plaintext = {};
byte[] readBytes(string file){
// Read bytes in from a file, exit with error message if not possible
byte[] bytesToRead = {};
try{
bytesToRead = File.ReadAllBytes(file);
}
catch(FileNotFoundException){
stderrWrite(file + " is not found");
Environment.Exit((int)ErrorCode.NoDataFileFound);
}
catch(UnauthorizedAccessException){
stderrWrite("No permssion to read " + file);
Environment.Exit((int)ErrorCode.NoPermissionToReadDataFile);
}
catch(IOException){
stderrWrite("Failed to read " + file);
Environment.Exit((int)ErrorCode.FailedToReadDataFile);
}
return bytesToRead;
}
var stdout = Console.OpenStandardOutput();
try{
// Decrypt a file using a key file
plaintext = RinseOff.decrypt_secret_bytes(
readBytes(filepath),
readBytes(keypath)
);
}
catch(Sodium.Exceptions.KeyOutOfRangeException){
stderrWrite("Keyfile is not appropriate size for key");
Environment.Exit((int)ErrorCode.InvalidKeyFileSize);
}
catch(System.Security.Cryptography.CryptographicException){
stderrWrite("Could not decrypt " + filepath + " with " + keypath);
Environment.Exit((int)ErrorCode.InvalidKeyFile);
}
// print the plaintext and exit
foreach(byte b in plaintext){
stdout.WriteByte(b);
}
stdout.Flush();
}
static void storeData(string filepath, string keypath){
byte[] encryptedInput = new byte[0];
void writeStdoutBytes(byte[] data){
var stdout = Console.OpenStandardOutput();
foreach (byte b in data){
stdout.WriteByte(b);
}
stdout.Flush();
}
byte[] readUntilClose(){
// Read binary from STDIN until close
var readData = new List<byte>();
Stream inputStream = Console.OpenStandardInput();
int inp;
while(true){
inp = inputStream.ReadByte();
if (inp != -1){
readData.Add((byte) inp);
}
else{
return readData.ToArray();
}
}
}
// Encrypt stdin with keyfile data then write out to output file
try{
encryptedInput = RinseOff.encrypt_secret_bytes(readUntilClose(), File.ReadAllBytes(keypath));
}
catch(FileNotFoundException){
stderrWrite("Key file " + keypath + " does not exist");
Environment.Exit((int)ErrorCode.KeyFileNotFound);
}
catch(Sodium.Exceptions.KeyOutOfRangeException){
stderrWrite("Keyfile is not appropriate size for key");
Environment.Exit((int)ErrorCode.InvalidKeyFileSize);
}
catch(IOException){
stderrWrite("Failed to read key file " + keypath);
Environment.Exit((int)ErrorCode.FailedToReadKeyFile);
}
if (filepath == "stdout"){
writeStdoutBytes(encryptedInput);
return;
}
try{
File.WriteAllBytes(filepath, encryptedInput);
}
catch(ArgumentNullException)
{
Environment.Exit(0);
}
catch(DirectoryNotFoundException){
stderrWrite("Output path " + filepath + " not found");
Environment.Exit((int)ErrorCode.NoDataFileFound);
}
catch(IOException){
stderrWrite("Could not write to " + filepath);
Environment.Exit((int)ErrorCode.FailedToWriteDataFile);
}
}
static void Main(string[] args)
{
if (args.Length == 0){
showHelp();
}
var cmd = args[0].ToLower();
switch(cmd){
case "keygen":
validateArgCount(args, 2);
try{
RinseOff.generateKeyFile(args[1]);
}
catch(UnauthorizedAccessException){
stderrWrite("Cannot write to key file due to lack of perms " + args[1]);
Environment.Exit((int)ErrorCode.NoPermissionToWriteKeyFile);
}
catch(DirectoryNotFoundException){
stderrWrite("Path not found " + args[1]);
Environment.Exit((int)ErrorCode.KeyFileNotFound);
}
catch(IOException){
stderrWrite("Error writing keyfile " + args[1]);
Environment.Exit((int)ErrorCode.FailedToWriteKeyFile);
}
break;
case "store":
validateArgCount(args, 3);
storeData(args[1], args[2]);
break;
case "load":
validateArgCount(args, 3);
loadData(args[1], args[2]);
break;
default:
stderrWrite("Invalid command");
showHelp();
break;
case "help":
case "--help":
case "-h":
showHelp();
break;
}
}
}
}

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<Project Sdk="Microsoft.NET.Sdk">
<ItemGroup>
<ProjectReference Include="..\rinseoff\rinseoff.csproj" />
</ItemGroup>
<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>net5.0</TargetFramework>
</PropertyGroup>
</Project>

49
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using NUnit.Framework;
using System.Text;
using System.Collections.Generic;
using Sodium;
using rinseoff;
/*
RinseOff - Encrypt or load data with a key file to help with secure erasure
Copyright (C) <2020> Kevin Froman
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
namespace testDecrypted
{
public class Tests
{
[SetUp]
public void Setup()
{
}
[Test]
public void testDecrypted()
{
var key = Sodium.SecretBox.GenerateKey();
var nonce = Sodium.SecretBox.GenerateNonce();
var msg = Encoding.Default.GetBytes("hey");
var encrypted = Sodium.SecretBox.Create(msg, nonce, key);
var combined = new List<byte>();
combined.AddRange(nonce);
combined.AddRange(encrypted);
Assert.AreEqual(
RinseOff.decrypt_secret_bytes(combined.ToArray(), key),
msg
);
}
}
}

49
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using NUnit.Framework;
using System.Text;
using System.Collections.Generic;
using rinseoff;
/*
RinseOff - Encrypt or load data with a key file to help with secure erasure
Copyright (C) <2020> Kevin Froman
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
namespace testEncrypted
{
public class Tests
{
[SetUp]
public void Setup()
{
}
[Test]
public void TestEncrypt()
{
var key = Sodium.SecretBox.GenerateKey();
var secret = Encoding.UTF8.GetBytes("Hello world");
var encrypted = RinseOff.encrypt_secret_bytes(secret, key);
var encryptedList = new List<byte>();
encryptedList.AddRange(encrypted);
Assert.AreNotEqual(secret, encrypted);
var nonce = encryptedList.GetRange(0, 24).ToArray();
var cipher = encryptedList.GetRange(24, encryptedList.Count - 24).ToArray();
var decrypted = Sodium.SecretBox.Open(cipher, nonce, key);
Assert.AreEqual(decrypted, secret);
}
}
}

41
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using NUnit.Framework;
using System.IO;
using rinseoff;
/*
RinseOff - Encrypt or load data with a key file to help with secure erasure
Copyright (C) <2020> Kevin Froman
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
namespace tests
{
public class Tests
{
[SetUp]
public void Setup()
{
}
[Test]
public void TestKeyGenBasic()
{
var f = Path.GetTempFileName();
RinseOff.generateKeyFile(f);
var k = File.ReadAllBytes(f);
Assert.IsTrue(k.Length == 32);
Assert.IsFalse(k[0] == k[1]);
File.Delete(f);
}
}
}

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<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<TargetFramework>net5.0</TargetFramework>
<IsPackable>false</IsPackable>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="nunit" Version="3.12.0" />
<PackageReference Include="NUnit3TestAdapter" Version="3.15.1" />
<PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.4.0" />
</ItemGroup>
<ItemGroup>
<ProjectReference Include="..\rinseoff\rinseoff.csproj" />
</ItemGroup>
</Project>

22
src/safedb/__init__.py Normal file
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@ -0,0 +1,22 @@
from typing import Union
from enum import Enum, auto
import dbm
class SafeDB:
def safe_get(key: Union[str, bytes]) -> bytes:
return
def __enter__(self):
self.db = dbm.open(self.db_path, "c")
return self.db
def __exit__(self):
self.db.close()
def __init__(self, db_path: str, use_):
self.db_path = db_path

62
src/safedb/securestring/__init__.py Normal file
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@ -0,0 +1,62 @@
import os
from typing import Union
import subprocess
from filepaths import secure_erase_key_file, app_root
import logger
_rinseoff = f"{app_root}/src/rinseoff/rinseoffcli"
def generate_secure_string_key_file():
if os.path.exists(secure_erase_key_file):
raise FileExistsError
process = subprocess.Popen(
["dotnet", "run",
"--project", _rinseoff,
"keygen", f"{secure_erase_key_file}"],
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
res = process.communicate()
if res[0]:
for line in res[0].decode('utf-8').split('\n'):
logger.info(line, terminal=True)
if res[1]:
logger.warn("Error when generating database encryption keyfile")
for line in res[1].decode('utf-8').split('\n'):
logger.error(line, terminal=True)
raise subprocess.CalledProcessError
def secure_string_create(plaintext: Union[bytes, bytearray, str]) -> bytes:
"""Create a "secure" string. Dont really rely on this, and dont use for comms
This is just to make forensics a little harder"""
try:
plaintext = plaintext.encode('utf-8')
except AttributeError:
pass
process = subprocess.Popen(
["dotnet", "run",
"--project", _rinseoff,
"store", "stdout", f"{secure_erase_key_file}"],
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
stdin=subprocess.PIPE)
res = process.communicate(plaintext)
if res[0] and not res[1]:
return res[0]
else:
logger.warn("Error when encrypting plaintext", terminal=True)
for line in res[1].decode('utf-8').split('\n'):
logger.error(line, terminal=True)
raise subprocess.CalledProcessError

1
tests/test_blocklist_class.py
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@ -13,7 +13,6 @@ from onionrsetup import setup_config, setup_default_plugins
createdirs.create_dirs()
setup_config()
setup_config()
setup_default_plugins()
import config

33
tests/test_secure_string.py Normal file
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#!/usr/bin/env python3
import sys, os
sys.path.append(".")
sys.path.append("src/")
import uuid
TEST_DIR = 'testdata/%s-%s' % (uuid.uuid4(), os.path.basename(__file__)) + '/'
print("Test directory:", TEST_DIR)
os.environ["ONIONR_HOME"] = TEST_DIR
import unittest, json
from utils import identifyhome, createdirs
from onionrsetup import setup_config
from safedb import securestring
import filepaths
createdirs.create_dirs()
setup_config()
class TestSecureString(unittest.TestCase):
def test_keyfile_gen(self):
assert not os.path.exists(filepaths.secure_erase_key_file)
securestring.generate_secure_string_key_file()
assert os.path.exists(filepaths.secure_erase_key_file)
def test_secure_string_encrypt(self):
with open(filepaths.secure_erase_key_file, 'wb') as ef:
ef.write(os.urandom(32))
pt = "hello world"
enc = securestring.secure_string_create(pt)
self.assertTrue(len(enc) > len(pt))
unittest.main()