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using System;
using System.IO;
using System.Linq;
using System.Text.RegularExpressions;
namespace ipn_tool
{
internal static class CheckSsvTest
{
/* GOOD sequence
Taggant Test Application
Taggant Library version 1
<fist filename not chacked>
- correct PE file
- taggant is found
- taggant object created
- taggant is correct
- taggant does not contain timestamp
- file protected by packer with 1 id, version .+
- hashmap covers following regions:
\d.+ any lines
- hashmap is valid
- full file hash is valid
- full file hash covers first \d+ bytes
- SPV Certificate
30 82 05 5b 30 82 03 43 a0 03 02 01 02 02 10 25 many lines
- User Certificate
30 82 04 04 30 82 02 ec a0 03 02 01 02 02 10 05 many lines
<second filename not chacked> etc
*/
internal static int Result(string logFile, string pemFile)
{
var expectedLines = new[]
{
/*00*/ new Regex("^Taggant Test Application$"),
/*01*/ null,
/*02*/ new Regex("^Taggant Library version 1$"),
/*03*/ null,
/*04*/ new Regex(@"^.+"),
/*05*/ new Regex(@"^ - correct PE file$"),
/*06*/ new Regex(@"^ - taggant is found$"),
/*07*/ new Regex(@"^ - taggant object created$"),
/*08*/ new Regex(@"^ - taggant is correct$"),
/*09*/ new Regex(@"^ - taggant does not contain timestamp$"),
/*10*/ new Regex(@"^ - file protected by packer with 1 id, version .+$"),
/*11*/ new Regex(@"^ - hashmap covers following regions:$"),
/*12*/ new Regex(@"^\d.+$"), //any lines
/*13*/ new Regex(@"^ - hashmap is valid$"),
/*14*/ new Regex(@"^ - full file hash is valid$"),
/*15*/ new Regex(@"^ - full file hash covers first \d+ bytes$"),
/*16*/ new Regex(@"^ - SPV Certificate$"),
/*17*/ null,
/*18*/ new Regex(@"^ - User Certificate"),
/*19*/ null
};
try
{
var stateIndex = 0;
var lineNo = 0;
var spv = new MemoryStream();
var usr = new MemoryStream();
var curFile = "unknown";
foreach (var line in File.ReadAllLines(logFile))
{
if (stateIndex == 4)
curFile = line;
var re = expectedLines[stateIndex];
var needCheck = true;
switch (stateIndex)
{
case 13:
needCheck = false;
if (re.IsMatch(line))
++stateIndex;
else if (!expectedLines[stateIndex - 1].IsMatch(line))
throw new InvalidDataException(string.Format("Regex '{0}' or '{1}' match was expected at line #{2} but got '{3}'", re, expectedLines[stateIndex - 1], lineNo, line));
break;
case 17:
if (!AppendToMemoryStream(line, spv))
{
stateIndex = 18;
re = expectedLines[stateIndex];
}
else
{
needCheck = false;
}
break;
case 19:
if (!AppendToMemoryStream(line, usr))
{
if (!CompareCertificates(pemFile, curFile, spv, usr))
return 1;
spv = new MemoryStream();
usr = new MemoryStream();
stateIndex = 4;
re = expectedLines[stateIndex];
}
else
{
needCheck = false;
}
break;
}
if(needCheck)
{
if (re == null && line != string.Empty)
throw new InvalidDataException(string.Format("Empty line #{0} was expected but got '{1}'", lineNo, line));
if (re != null && !re.IsMatch(line))
throw new InvalidDataException(string.Format("Regex '{0}' match was expected at line #{1} but got '{2}'", re, lineNo, line));
++stateIndex;
}
++lineNo;
}
return CompareCertificates(pemFile, curFile, spv, usr) ? 0 : 1;
}
catch (Exception ex)
{
Console.Error.WriteLine(ex);
return 1;
}
}
private static bool CompareCertificates(string pemFile, string binaryName, MemoryStream spv, MemoryStream usr)
{
var pemContents = File.ReadAllText(pemFile);
var m = Regex.Match(pemContents,
@"^-----BEGIN CERTIFICATE-----[\s]*(?<spv>([^-]+))[\s]*-----END CERTIFICATE-----[\s]*-----BEGIN CERTIFICATE-----[\s]*(?<usr>([^-]+))[\s]*-----END CERTIFICATE-----[\s]*-----BEGIN RSA PRIVATE KEY-----[\s]*(?<pkey>([^-]+))[\s]*-----END RSA PRIVATE KEY-----[\s]*$",
RegexOptions.Multiline);
if (!m.Success)
throw new InvalidDataException("Cannot parse " + pemFile);
var expectedSpv = Convert.FromBase64String(m.Groups["spv"].Value);
var expectedUsr = Convert.FromBase64String(m.Groups["usr"].Value);
//TODO: check private key if need
return CompareBa("SPV", binaryName, expectedSpv, spv.ToArray()) && CompareBa("USER", binaryName, expectedUsr, usr.ToArray());
}
private static bool CompareBa(string partName, string binaryName, byte[] p1, byte[] p2)
{
if (p1.Length == p2.Length && p1.Length > 0)
{
for(var i = 0; i < p1.Length; i++)
if (p1[i] != p2[i])
throw new InvalidDataException(string.Format("taggant.pem {0} did not match to file {1} signature at position {2}.", partName, binaryName, i));
return true;
}
throw new InvalidDataException(string.Format("taggant.pem {0} did not match to file {1} signature", partName, binaryName));
}
// 30 82 05 5b 30 82 03 43 a0 03 02 01 02 02 10 25 - typical line
private static bool AppendToMemoryStream(string line, Stream spv)
{
if (!Regex.IsMatch(line, @"^[\s0-9A-F]+$", RegexOptions.IgnoreCase))
return false;
var chunk = StringToByteArray(line.Replace(" ", ""));
spv.Write(chunk, 0, chunk.Length);
return true;
}
private static byte[] StringToByteArray(string hex)
{
return Enumerable.Range(0, hex.Length)
.Where(x => x % 2 == 0)
.Select(x => Convert.ToByte(hex.Substring(x, 2), 16))
.ToArray();
}
}
}
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