diff options
| -rw-r--r-- | crypto/src/crypto/modes/GCMBlockCipher.cs | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/crypto/src/crypto/modes/GCMBlockCipher.cs b/crypto/src/crypto/modes/GCMBlockCipher.cs index 8e6120eef..ecebc3de9 100644 --- a/crypto/src/crypto/modes/GCMBlockCipher.cs +++ b/crypto/src/crypto/modes/GCMBlockCipher.cs @@ -513,10 +513,11 @@ namespace Org.BouncyCastle.Crypto.Modes private byte[] GetNextCounterBlock() { - for (int i = 15; i >= 12; --i) - { - if (++counter[i] != 0) break; - } + uint c = 1; + c += counter[15]; counter[15] = (byte)c; c >>= 8; + c += counter[14]; counter[14] = (byte)c; c >>= 8; + c += counter[13]; counter[13] = (byte)c; c >>= 8; + c += counter[12]; counter[12] = (byte)c; byte[] tmp = new byte[BlockSize]; // TODO Sure would be nice if ciphers could operate on int[] |