diff options
| -rw-r--r-- | crypto/gf128mul.c | 13 | ||||
| -rw-r--r-- | include/crypto/gf128mul.h | 2 |
2 files changed, 14 insertions, 1 deletions
diff --git a/crypto/gf128mul.c b/crypto/gf128mul.c index dc012129c063..24e601954c7a 100644 --- a/crypto/gf128mul.c +++ b/crypto/gf128mul.c @@ -156,6 +156,19 @@ static void gf128mul_x8_bbe(be128 *x) x->b = cpu_to_be64((b << 8) ^ _tt); } +void gf128mul_x8_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_table_be[a >> 56]; + + r->a = cpu_to_le64((a << 8) | (b >> 56)); + r->b = cpu_to_le64((b << 8) ^ _tt); +} +EXPORT_SYMBOL(gf128mul_x8_ble); + void gf128mul_lle(be128 *r, const be128 *b) { be128 p[8]; diff --git a/include/crypto/gf128mul.h b/include/crypto/gf128mul.h index 0977fb18ff68..fa0a63d298dc 100644 --- a/include/crypto/gf128mul.h +++ b/include/crypto/gf128mul.h @@ -227,7 +227,7 @@ struct gf128mul_4k *gf128mul_init_4k_lle(const be128 *g); struct gf128mul_4k *gf128mul_init_4k_bbe(const be128 *g); void gf128mul_4k_lle(be128 *a, const struct gf128mul_4k *t); void gf128mul_4k_bbe(be128 *a, const struct gf128mul_4k *t); - +void gf128mul_x8_ble(le128 *r, const le128 *x); static inline void gf128mul_free_4k(struct gf128mul_4k *t) { kzfree(t); |