From: Herbert Xu Date: Tue, 17 Feb 2009 12:00:11 +0000 (+0800) Subject: crypto: lrw - Fix big endian support X-Git-Tag: accepted/tizen/common/20141203.182822~17087^2~29 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=8eb2dfac41c71701bb741f496f0cb7b7e4a3c3f6;p=platform%2Fkernel%2Flinux-arm64.git 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 --- diff --git a/crypto/lrw.c b/crypto/lrw.c index 8ef664e..358f80b 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,