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Ensure cloud sync IV is 12 bytes

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M66B
2025-05-16 08:09:05 +02:00
parent 9ffa60c05b
commit e63ebe1594
1 changed files with 3 additions and 2 deletions
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5
app/src/main/java/eu/faircode/email/CloudSync.java
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@@ -777,7 +777,8 @@ public class CloudSync {
private static byte[] getIv(long revision) {
byte[] iv = ByteBuffer.allocate(12)
.putLong(revision)
.putLong(revision) // 8 bytes
.putInt(0) // 4 bytes
.array();
return iv;
}
@@ -785,7 +786,7 @@ public class CloudSync {
private static byte[] getAd(String key, long revision) throws NoSuchAlgorithmException {
byte[] k = MessageDigest.getInstance("SHA256").digest(key.getBytes());
byte[] ad = ByteBuffer.allocate(8 + 8)
.putLong(revision)
.putLong(revision) // 8 bytes
.put(Arrays.copyOfRange(k, 0, 8))
.array();
return ad;