− | | Decrypted header's CTR. Also used to calculate the size of the entire package2 with the raw header: size = word2 ^ word3 ^ word0. | + | | Header's CTR. Official code copies the pre-decryption CTR over the decrypted result. Used to calculate the size of the entire package2 with the raw header: size = word2 ^ word3 ^ word0, additionally validated by checking (word1 ^ (word1 >> 16)) & 0xFF == word1 >> 24. |