From 8eb2dfac41c71701bb741f496f0cb7b7e4a3c3f6 Mon Sep 17 00:00:00 2001 From: Herbert Xu Date: Tue, 17 Feb 2009 20:00:11 +0800 Subject: crypto: lrw - Fix big endian support It turns out that LRW has never worked properly on big endian. This was never discussed because nobody actually used it that way. In fact, it was only discovered when Geert Uytterhoeven loaded it through tcrypt which failed the test on it. The fix is straightforward, on big endian the to find the nth bit we should be grouping them by words instead of bytes. So setbit128_bbe should xor with 128 - BITS_PER_LONG instead of 128 - BITS_PER_BYTE == 0x78. Tested-by: Geert Uytterhoeven Signed-off-by: Herbert Xu --- crypto/lrw.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/crypto/lrw.c b/crypto/lrw.c index 8ef664e3bcd9..358f80be2bf9 100644 --- a/crypto/lrw.c +++ b/crypto/lrw.c @@ -45,7 +45,13 @@ struct priv { static inline void setbit128_bbe(void *b, int bit) { - __set_bit(bit ^ 0x78, b); + __set_bit(bit ^ (0x80 - +#ifdef __BIG_ENDIAN + BITS_PER_LONG +#else + BITS_PER_BYTE +#endif + ), b); } static int setkey(struct crypto_tfm *parent, const u8 *key, -- cgit v1.2.2