Add OCB bulk crypt/auth functions for AES/AES-NI

* cipher/cipher-internal.h (gcry_cipher_handle): Add bulk.ocb_crypt
and bulk.ocb_auth.
(_gcry_cipher_ocb_get_l): New prototype.
* cipher/cipher-ocb.c (get_l): Rename to ...
(_gcry_cipher_ocb_get_l): ... this.
(_gcry_cipher_ocb_authenticate, ocb_crypt): Use bulk function when
available.
* cipher/cipher.c (_gcry_cipher_open_internal): Setup OCB bulk
functions for AES.
* cipher/rijndael-aesni.c (get_l, aesni_ocb_enc, aes_ocb_dec)
(_gcry_aes_aesni_ocb_crypt, _gcry_aes_aesni_ocb_auth): New.
* cipher/rijndael.c [USE_AESNI] (_gcry_aes_aesni_ocb_crypt)
(_gcry_aes_aesni_ocb_auth): New prototypes.
(_gcry_aes_ocb_crypt, _gcry_aes_ocb_auth): New.
* src/cipher.h (_gcry_aes_ocb_crypt, _gcry_aes_ocb_auth): New
prototypes.
* tests/basic.c (check_ocb_cipher_largebuf): New.
(check_ocb_cipher): Add large buffer encryption/decryption test.
--

Patch adds bulk encryption/decryption/authentication code for AES-NI
accelerated AES.

Benchmark on Intel i5-4570 (3200 Mhz, turbo off):

Before:
 AES            |  nanosecs/byte   mebibytes/sec   cycles/byte
        OCB enc |      2.12 ns/B     449.7 MiB/s      6.79 c/B
        OCB dec |      2.12 ns/B     449.6 MiB/s      6.79 c/B
       OCB auth |      2.07 ns/B     459.9 MiB/s      6.64 c/B

After:
 AES            |  nanosecs/byte   mebibytes/sec   cycles/byte
        OCB enc |     0.292 ns/B    3262.5 MiB/s     0.935 c/B
        OCB dec |     0.297 ns/B    3212.2 MiB/s     0.950 c/B
       OCB auth |     0.260 ns/B    3666.1 MiB/s     0.832 c/B

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>

1 files changed, 5 insertions, 0 deletions

diff --git a/cipher/cipher-internal.h b/cipher/cipher-internal.h
index 50b03243..e20ea562 100644
--- a/cipher/cipher-internal.h
+++ b/cipher/cipher-internal.h
@@ -128,6 +128,9 @@ struct gcry_cipher_handle
     void (*ctr_enc)(void *context, unsigned char *iv,
                     void *outbuf_arg, const void *inbuf_arg,
                     size_t nblocks);
+    void (*ocb_crypt)(gcry_cipher_hd_t c, void *outbuf_arg,
+                      const void *inbuf_arg, size_t nblocks, int encrypt);
+    void (*ocb_auth)(gcry_cipher_hd_t c, const void *abuf_arg, size_t nblocks);
   } bulk;
 
 
@@ -440,6 +443,8 @@ gcry_err_code_t _gcry_cipher_ocb_get_tag
 gcry_err_code_t _gcry_cipher_ocb_check_tag
 /*           */ (gcry_cipher_hd_t c,
                  const unsigned char *intag, size_t taglen);
+const unsigned char *_gcry_cipher_ocb_get_l
+/*           */ (gcry_cipher_hd_t c, unsigned char *l_tmp, u64 n);
 
 
 #endif /*G10_CIPHER_INTERNAL_H*/