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authorHerbert Xu <herbert@gondor.apana.org.au>2009-02-17 15:00:11 +0300
committerHerbert Xu <herbert@gondor.apana.org.au>2009-02-17 15:00:11 +0300
commit8eb2dfac41c71701bb741f496f0cb7b7e4a3c3f6 (patch)
tree20b846256745f676a91d9bc97a03ed265b8c2b56
parentd2f8d7ee1a9b4650b4e43325b321801264f7c37a (diff)
downloadlinux-8eb2dfac41c71701bb741f496f0cb7b7e4a3c3f6.tar.xz
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 <Geert.Uytterhoeven@sonycom.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
-rw-r--r--crypto/lrw.c8
1 files changed, 7 insertions, 1 deletions
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,