diff options
Diffstat (limited to 'core/src/main/java/org/bouncycastle/crypto/modes/gcm/Tables8kGCMMultiplier.java')
| -rw-r--r-- | core/src/main/java/org/bouncycastle/crypto/modes/gcm/Tables8kGCMMultiplier.java | 90 |
1 files changed, 0 insertions, 90 deletions
diff --git a/core/src/main/java/org/bouncycastle/crypto/modes/gcm/Tables8kGCMMultiplier.java b/core/src/main/java/org/bouncycastle/crypto/modes/gcm/Tables8kGCMMultiplier.java deleted file mode 100644 index 69c1dce8..00000000 --- a/core/src/main/java/org/bouncycastle/crypto/modes/gcm/Tables8kGCMMultiplier.java +++ /dev/null @@ -1,90 +0,0 @@ -package org.bouncycastle.crypto.modes.gcm; - -import org.bouncycastle.util.Arrays; -import org.bouncycastle.util.Pack; - -public class Tables8kGCMMultiplier implements GCMMultiplier -{ - private byte[] H; - private int[][][] M; - - public void init(byte[] H) - { - if (M == null) - { - M = new int[32][16][4]; - } - else if (Arrays.areEqual(this.H, H)) - { - return; - } - - this.H = Arrays.clone(H); - - // M[0][0] is ZEROES; - // M[1][0] is ZEROES; - GCMUtil.asInts(H, M[1][8]); - - for (int j = 4; j >= 1; j >>= 1) - { - GCMUtil.multiplyP(M[1][j + j], M[1][j]); - } - - GCMUtil.multiplyP(M[1][1], M[0][8]); - - for (int j = 4; j >= 1; j >>= 1) - { - GCMUtil.multiplyP(M[0][j + j], M[0][j]); - } - - int i = 0; - for (;;) - { - for (int j = 2; j < 16; j += j) - { - for (int k = 1; k < j; ++k) - { - GCMUtil.xor(M[i][j], M[i][k], M[i][j + k]); - } - } - - if (++i == 32) - { - return; - } - - if (i > 1) - { - // M[i][0] is ZEROES; - for(int j = 8; j > 0; j >>= 1) - { - GCMUtil.multiplyP8(M[i - 2][j], M[i][j]); - } - } - } - } - - public void multiplyH(byte[] x) - { -// assert x.Length == 16; - - int[] z = new int[4]; - for (int i = 15; i >= 0; --i) - { -// GCMUtil.xor(z, M[i + i][x[i] & 0x0f]); - int[] m = M[i + i][x[i] & 0x0f]; - z[0] ^= m[0]; - z[1] ^= m[1]; - z[2] ^= m[2]; - z[3] ^= m[3]; -// GCMUtil.xor(z, M[i + i + 1][(x[i] & 0xf0) >>> 4]); - m = M[i + i + 1][(x[i] & 0xf0) >>> 4]; - z[0] ^= m[0]; - z[1] ^= m[1]; - z[2] ^= m[2]; - z[3] ^= m[3]; - } - - Pack.intToBigEndian(z, x, 0); - } -}
\ No newline at end of file |