toad.city
That fuck shit the fascists are using
1package org.tm.archive.logging;
2
3import android.content.Context;
4import android.os.Build;
5
6import androidx.annotation.NonNull;
7
8import org.tm.archive.crypto.KeyStoreHelper;
9import org.signal.core.util.Base64;
10import org.tm.archive.util.TextSecurePreferences;
11
12import java.io.IOException;
13import java.security.SecureRandom;
14
15public class LogSecretProvider {
16
17 public static byte[] getOrCreateAttachmentSecret(@NonNull Context context) {
18 String unencryptedSecret = TextSecurePreferences.getLogUnencryptedSecret(context);
19 String encryptedSecret = TextSecurePreferences.getLogEncryptedSecret(context);
20
21 if (unencryptedSecret != null) return parseUnencryptedSecret(unencryptedSecret);
22 else if (encryptedSecret != null) return parseEncryptedSecret(encryptedSecret);
23 else return createAndStoreSecret(context);
24 }
25
26 private static byte[] parseUnencryptedSecret(String secret) {
27 try {
28 return Base64.decode(secret);
29 } catch (IOException e) {
30 throw new AssertionError("Failed to decode the unecrypted secret.");
31 }
32 }
33
34 private static byte[] parseEncryptedSecret(String secret) {
35 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
36 KeyStoreHelper.SealedData encryptedSecret = KeyStoreHelper.SealedData.fromString(secret);
37 return KeyStoreHelper.unseal(encryptedSecret);
38 } else {
39 throw new AssertionError("OS downgrade not supported. KeyStore sealed data exists on platform < M!");
40 }
41 }
42
43 private static byte[] createAndStoreSecret(@NonNull Context context) {
44 SecureRandom random = new SecureRandom();
45 byte[] secret = new byte[32];
46 random.nextBytes(secret);
47
48 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
49 KeyStoreHelper.SealedData encryptedSecret = KeyStoreHelper.seal(secret);
50 TextSecurePreferences.setLogEncryptedSecret(context, encryptedSecret.serialize());
51 } else {
52 TextSecurePreferences.setLogUnencryptedSecret(context, Base64.encodeWithPadding(secret));
53 }
54
55 return secret;
56 }
57}