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-rw-r--r--lib/chacha20.c74
1 files changed, 0 insertions, 74 deletions
diff --git a/lib/chacha20.c b/lib/chacha20.c
deleted file mode 100644
index c1cc50fb68c9..000000000000
--- a/lib/chacha20.c
+++ /dev/null
@@ -1,74 +0,0 @@
-/*
- * ChaCha20 256-bit cipher algorithm, RFC7539
- *
- * Copyright (C) 2015 Martin Willi
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#include <linux/kernel.h>
-#include <linux/export.h>
-#include <linux/bitops.h>
-#include <linux/cryptohash.h>
-#include <asm/unaligned.h>
-#include <crypto/chacha20.h>
-
-void chacha20_block(u32 *state, u32 *stream)
-{
- u32 x[16], *out = stream;
- int i;
-
- for (i = 0; i < ARRAY_SIZE(x); i++)
- x[i] = state[i];
-
- for (i = 0; i < 20; i += 2) {
- x[0] += x[4]; x[12] = rol32(x[12] ^ x[0], 16);
- x[1] += x[5]; x[13] = rol32(x[13] ^ x[1], 16);
- x[2] += x[6]; x[14] = rol32(x[14] ^ x[2], 16);
- x[3] += x[7]; x[15] = rol32(x[15] ^ x[3], 16);
-
- x[8] += x[12]; x[4] = rol32(x[4] ^ x[8], 12);
- x[9] += x[13]; x[5] = rol32(x[5] ^ x[9], 12);
- x[10] += x[14]; x[6] = rol32(x[6] ^ x[10], 12);
- x[11] += x[15]; x[7] = rol32(x[7] ^ x[11], 12);
-
- x[0] += x[4]; x[12] = rol32(x[12] ^ x[0], 8);
- x[1] += x[5]; x[13] = rol32(x[13] ^ x[1], 8);
- x[2] += x[6]; x[14] = rol32(x[14] ^ x[2], 8);
- x[3] += x[7]; x[15] = rol32(x[15] ^ x[3], 8);
-
- x[8] += x[12]; x[4] = rol32(x[4] ^ x[8], 7);
- x[9] += x[13]; x[5] = rol32(x[5] ^ x[9], 7);
- x[10] += x[14]; x[6] = rol32(x[6] ^ x[10], 7);
- x[11] += x[15]; x[7] = rol32(x[7] ^ x[11], 7);
-
- x[0] += x[5]; x[15] = rol32(x[15] ^ x[0], 16);
- x[1] += x[6]; x[12] = rol32(x[12] ^ x[1], 16);
- x[2] += x[7]; x[13] = rol32(x[13] ^ x[2], 16);
- x[3] += x[4]; x[14] = rol32(x[14] ^ x[3], 16);
-
- x[10] += x[15]; x[5] = rol32(x[5] ^ x[10], 12);
- x[11] += x[12]; x[6] = rol32(x[6] ^ x[11], 12);
- x[8] += x[13]; x[7] = rol32(x[7] ^ x[8], 12);
- x[9] += x[14]; x[4] = rol32(x[4] ^ x[9], 12);
-
- x[0] += x[5]; x[15] = rol32(x[15] ^ x[0], 8);
- x[1] += x[6]; x[12] = rol32(x[12] ^ x[1], 8);
- x[2] += x[7]; x[13] = rol32(x[13] ^ x[2], 8);
- x[3] += x[4]; x[14] = rol32(x[14] ^ x[3], 8);
-
- x[10] += x[15]; x[5] = rol32(x[5] ^ x[10], 7);
- x[11] += x[12]; x[6] = rol32(x[6] ^ x[11], 7);
- x[8] += x[13]; x[7] = rol32(x[7] ^ x[8], 7);
- x[9] += x[14]; x[4] = rol32(x[4] ^ x[9], 7);
- }
-
- for (i = 0; i < ARRAY_SIZE(x); i++)
- out[i] = cpu_to_le32(x[i] + state[i]);
-
- state[12]++;
-}
-EXPORT_SYMBOL(chacha20_block);