Last active
April 3, 2018 18:33
-
-
Save fredlahde/6bdf90cff314b5ff18c282cf0cc4540f to your computer and use it in GitHub Desktop.
Keystream parser
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Hinweis IV:050607 bedeutet IV[0]=05,IV[1]=06,IV[2]=07 | |
IV: 02 01 C4 Schlüsselstrom: 02 | |
IV: 03 01 C4 Schlüsselstrom: F8 | |
IV: 03 FF 15 Schlüsselstrom: E0 | |
IV: 03 FF 78 Schlüsselstrom: 54 | |
IV: 02 01 A3 Schlüsselstrom: FC | |
IV: 02 01 F3 Schlüsselstrom: 73 | |
IV: 03 FF 99 Schlüsselstrom: AA | |
IV: 02 01 0C Schlüsselstrom: CD | |
IV: 02 01 43 Schlüsselstrom: A1 | |
IV: 02 FF 27 Schlüsselstrom: 2A | |
IV: 03 01 FA Schlüsselstrom: 2E | |
IV: 03 FF 08 Schlüsselstrom: 0A | |
IV: 03 FF 84 Schlüsselstrom: 4F | |
IV: 02 FF 9F Schlüsselstrom: C9 | |
IV: 03 01 CC Schlüsselstrom: 27 | |
IV: 03 01 63 Schlüsselstrom: 95 | |
IV: 02 FF 5F Schlüsselstrom: 38 | |
IV: 03 01 8D Schlüsselstrom: DA | |
IV: 03 FF FC Schlüsselstrom: 6F | |
IV: 03 FF 8E Schlüsselstrom: EC | |
IV: 03 01 AA Schlüsselstrom: D8 | |
IV: 02 FF CF Schlüsselstrom: E0 | |
IV: 02 FF E2 Schlüsselstrom: 91 | |
IV: 02 01 34 Schlüsselstrom: 4E |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
import java.io.BufferedReader; | |
import java.io.File; | |
import java.io.FileReader; | |
import java.io.IOException; | |
import java.util.ArrayList; | |
import java.util.Arrays; | |
import java.util.List; | |
import java.util.Objects; | |
import java.util.regex.Matcher; | |
import java.util.regex.Pattern; | |
@SuppressWarnings("WeakerAccess") | |
class IVKeystreamEntry { | |
int first, second, third; | |
int key; | |
IVKeystreamEntry() { | |
} | |
@Override | |
public boolean equals(Object o) { | |
if (this == o) return true; | |
if (o == null || getClass() != o.getClass()) return false; | |
IVKeystreamEntry that = (IVKeystreamEntry) o; | |
return first == that.first && | |
second == that.second && | |
third == that.third && | |
key == that.key; | |
} | |
@Override | |
public int hashCode() { | |
return Objects.hash(first, second, third, key); | |
} | |
@Override | |
public String toString() { | |
return "IVKeystreamEntry{" + | |
"first=" + first + | |
", second=" + second + | |
", third=" + third + | |
", key=" + key + | |
'}'; | |
} | |
} | |
public class Main { | |
private static final Pattern linePattern = Pattern.compile("IV: (?<first>[0-9A-Z]+)\\s(?<second>[0-9A-Z]+)\\s(?<third>[0-9A-Z]+)\\s+Schlüsselstrom:\\s(?<key>[0-9A-Z]+)"); | |
public static void main(String[] args) throws IOException { | |
@SuppressWarnings("SpellCheckingInspection") File file = new File("IVkeystream.txt"); | |
BufferedReader reader = new BufferedReader(new FileReader(file)); | |
reader.readLine(); | |
String line; | |
List<IVKeystreamEntry> entryList = new ArrayList<>(); | |
try (reader) { | |
line = reader.readLine(); | |
while (line != null) { | |
line = reader.readLine(); | |
entryList.add(mapToEntry(line)); | |
} | |
} catch (IOException e) { | |
e.printStackTrace(); | |
} | |
entryList.stream() | |
.filter(Objects::nonNull) | |
.filter(entry -> entry.first == 3 && entry.second == 255) | |
.map(IVKeystreamEntry::toString) | |
.reduce((sum, item) -> sum + '\n' + item) | |
.ifPresent(System.out::println); | |
} | |
private static IVKeystreamEntry mapToEntry(String line) { | |
if (line == null) { | |
return null; | |
} | |
Matcher matcher = linePattern.matcher(line); | |
if (!matcher.find()) { | |
return null; | |
} | |
final IVKeystreamEntry entry = new IVKeystreamEntry(); | |
Arrays.asList(entry.getClass().getDeclaredFields()) | |
.forEach(field -> { | |
try { | |
field.setInt(entry, Integer.valueOf(matcher.group(field.getName()), 16)); | |
} catch (IllegalAccessException e) { | |
e.printStackTrace(); | |
} | |
}); | |
return entry; | |
} | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment