diff options
| author | Shane Wang <shane.wang@intel.com> | 2009-09-02 20:05:22 +1000 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2009-09-02 20:05:22 +1000 |
| commit | f1939f7c56456d22a559d2c75156e91912a2e97e (patch) | |
| tree | 49b16096a65ccb318777b50e15e3ed2c66db0500 /include | |
| parent | 2bf2901669a564b402cd0e40eb3f941c391e64c4 (diff) | |
crypto: vmac - New hash algorithm for intel_txt support
This patch adds VMAC (a fast MAC) support into crypto framework.
Signed-off-by: Shane Wang <shane.wang@intel.com>
Signed-off-by: Joseph Cihula <joseph.cihula@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'include')
| -rw-r--r-- | include/crypto/vmac.h | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/include/crypto/vmac.h b/include/crypto/vmac.h new file mode 100644 index 00000000000..c4467c55df1 --- /dev/null +++ b/include/crypto/vmac.h @@ -0,0 +1,61 @@ +/* + * Modified to interface to the Linux kernel + * Copyright (c) 2009, Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program; if not, write to the Free Software Foundation, Inc., 59 Temple + * Place - Suite 330, Boston, MA 02111-1307 USA. + */ + +#ifndef __CRYPTO_VMAC_H +#define __CRYPTO_VMAC_H + +/* -------------------------------------------------------------------------- + * VMAC and VHASH Implementation by Ted Krovetz (tdk@acm.org) and Wei Dai. + * This implementation is herby placed in the public domain. + * The authors offers no warranty. Use at your own risk. + * Please send bug reports to the authors. + * Last modified: 17 APR 08, 1700 PDT + * ----------------------------------------------------------------------- */ + +/* + * User definable settings. + */ +#define VMAC_TAG_LEN 64 +#define VMAC_KEY_SIZE 128/* Must be 128, 192 or 256 */ +#define VMAC_KEY_LEN (VMAC_KEY_SIZE/8) +#define VMAC_NHBYTES 128/* Must 2^i for any 3 < i < 13 Standard = 128*/ + +/* + * This implementation uses u32 and u64 as names for unsigned 32- + * and 64-bit integer types. These are defined in C99 stdint.h. The + * following may need adaptation if you are not running a C99 or + * Microsoft C environment. + */ +struct vmac_ctx { + u64 nhkey[(VMAC_NHBYTES/8)+2*(VMAC_TAG_LEN/64-1)]; + u64 polykey[2*VMAC_TAG_LEN/64]; + u64 l3key[2*VMAC_TAG_LEN/64]; + u64 polytmp[2*VMAC_TAG_LEN/64]; + u64 cached_nonce[2]; + u64 cached_aes[2]; + int first_block_processed; +}; + +typedef u64 vmac_t; + +struct vmac_ctx_t { + struct crypto_cipher *child; + struct vmac_ctx __vmac_ctx; +}; + +#endif /* __CRYPTO_VMAC_H */ |