diff options
Diffstat (limited to 'cipher/cipher-internal.h')
| -rw-r--r-- | cipher/cipher-internal.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/cipher/cipher-internal.h b/cipher/cipher-internal.h index bb86d376..29c6f338 100644 --- a/cipher/cipher-internal.h +++ b/cipher/cipher-internal.h @@ -448,4 +448,24 @@ const unsigned char *_gcry_cipher_ocb_get_l /* */ (gcry_cipher_hd_t c, unsigned char *l_tmp, u64 n); +/* Inline version of _gcry_cipher_ocb_get_l, with hard-coded fast paths for + most common cases. */ +static inline const unsigned char * +ocb_get_l (gcry_cipher_hd_t c, unsigned char *l_tmp, u64 n) +{ + if (n & 1) + return c->u_mode.ocb.L[0]; + else if (n & 2) + return c->u_mode.ocb.L[1]; + else + { + unsigned int ntz = _gcry_ctz64 (n); + + if (ntz < OCB_L_TABLE_SIZE) + return c->u_mode.ocb.L[ntz]; + else + return _gcry_cipher_ocb_get_l (c, l_tmp, n); + } +} + #endif /*G10_CIPHER_INTERNAL_H*/ |