crypto: gf128mul - switch gf128mul_x_ble to le128
Currently, gf128mul_x_ble works with pointers to be128, even though it
actually interprets the words as little-endian. Consequently, it uses
cpu_to_le64/le64_to_cpu on fields of type __be64, which is incorrect.
This patch fixes that by changing the function to accept pointers to
le128 and updating all users accordingly.
Signed-off-by: Ondrej Mosnacek <omosnacek@gmail.com>
Reviewd-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/include/crypto/gf128mul.h b/include/crypto/gf128mul.h
index 35ced9d..0977fb1 100644
--- a/include/crypto/gf128mul.h
+++ b/include/crypto/gf128mul.h
@@ -205,16 +205,16 @@ static inline void gf128mul_x_bbe(be128 *r, const be128 *x)
}
/* needed by XTS */
-static inline void gf128mul_x_ble(be128 *r, const be128 *x)
+static inline void gf128mul_x_ble(le128 *r, const le128 *x)
{
u64 a = le64_to_cpu(x->a);
u64 b = le64_to_cpu(x->b);
/* equivalent to gf128mul_table_be[b >> 63] (see crypto/gf128mul.c): */
- u64 _tt = gf128mul_mask_from_bit(b, 63) & 0x87;
+ u64 _tt = gf128mul_mask_from_bit(a, 63) & 0x87;
- r->a = cpu_to_le64((a << 1) ^ _tt);
- r->b = cpu_to_le64((b << 1) | (a >> 63));
+ r->a = cpu_to_le64((a << 1) | (b >> 63));
+ r->b = cpu_to_le64((b << 1) ^ _tt);
}
/* 4k table optimization */