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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>
This commit is contained in:
Shane Wang
Herbert Xu
parent
2bf2901669
commit
f1939f7c56
7 changed files with 781 additions and 0 deletions
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@ -269,6 +269,18 @@ config CRYPTO_XCBC
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http://csrc.nist.gov/encryption/modes/proposedmodes/
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xcbc-mac/xcbc-mac-spec.pdf
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config CRYPTO_VMAC
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tristate "VMAC support"
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depends on EXPERIMENTAL
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select CRYPTO_HASH
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select CRYPTO_MANAGER
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help
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VMAC is a message authentication algorithm designed for
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very high speed on 64-bit architectures.
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See also:
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<http://fastcrypto.org/vmac>
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comment "Digest"
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config CRYPTO_CRC32C
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@ -32,6 +32,7 @@ cryptomgr-objs := algboss.o testmgr.o
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obj-$(CONFIG_CRYPTO_MANAGER2) += cryptomgr.o
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obj-$(CONFIG_CRYPTO_HMAC) += hmac.o
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obj-$(CONFIG_CRYPTO_VMAC) += vmac.o
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obj-$(CONFIG_CRYPTO_XCBC) += xcbc.o
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obj-$(CONFIG_CRYPTO_NULL) += crypto_null.o
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obj-$(CONFIG_CRYPTO_MD4) += md4.o
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@ -719,6 +719,10 @@ static int do_test(int m)
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ret += tcrypt_test("hmac(rmd160)");
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break;
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case 109:
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ret += tcrypt_test("vmac(aes)");
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break;
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case 150:
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ret += tcrypt_test("ansi_cprng");
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break;
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@ -2247,6 +2247,15 @@ static const struct alg_test_desc alg_test_descs[] = {
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.count = TGR192_TEST_VECTORS
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}
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}
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}, {
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.alg = "vmac(aes)",
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.test = alg_test_hash,
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.suite = {
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.hash = {
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.vecs = aes_vmac128_tv_template,
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.count = VMAC_AES_TEST_VECTORS
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}
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}
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}, {
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.alg = "wp256",
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.test = alg_test_hash,
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@ -1654,6 +1654,22 @@ static struct hash_testvec aes_xcbc128_tv_template[] = {
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}
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};
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#define VMAC_AES_TEST_VECTORS 1
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static char vmac_string[128] = {'\x01', '\x01', '\x01', '\x01',
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'\x02', '\x03', '\x02', '\x02',
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'\x02', '\x04', '\x01', '\x07',
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'\x04', '\x01', '\x04', '\x03',};
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static struct hash_testvec aes_vmac128_tv_template[] = {
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{
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.key = "\x00\x01\x02\x03\x04\x05\x06\x07"
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"\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f",
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.plaintext = vmac_string,
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.digest = "\xcb\xd7\x8a\xfd\xb7\x33\x79\xe7",
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.psize = 128,
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.ksize = 16,
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},
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};
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/*
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* SHA384 HMAC test vectors from RFC4231
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*/
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678
crypto/vmac.c
Normal file
678
crypto/vmac.c
Normal file
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@ -0,0 +1,678 @@
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/*
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* Modified to interface to the Linux kernel
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* Copyright (c) 2009, Intel Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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* Place - Suite 330, Boston, MA 02111-1307 USA.
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*/
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/* --------------------------------------------------------------------------
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* VMAC and VHASH Implementation by Ted Krovetz (tdk@acm.org) and Wei Dai.
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* This implementation is herby placed in the public domain.
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* The authors offers no warranty. Use at your own risk.
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* Please send bug reports to the authors.
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* Last modified: 17 APR 08, 1700 PDT
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* ----------------------------------------------------------------------- */
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#include <linux/init.h>
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#include <linux/types.h>
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#include <linux/crypto.h>
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#include <linux/scatterlist.h>
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#include <asm/byteorder.h>
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#include <crypto/scatterwalk.h>
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#include <crypto/vmac.h>
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#include <crypto/internal/hash.h>
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/*
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* Constants and masks
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*/
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#define UINT64_C(x) x##ULL
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const u64 p64 = UINT64_C(0xfffffffffffffeff); /* 2^64 - 257 prime */
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const u64 m62 = UINT64_C(0x3fffffffffffffff); /* 62-bit mask */
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const u64 m63 = UINT64_C(0x7fffffffffffffff); /* 63-bit mask */
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const u64 m64 = UINT64_C(0xffffffffffffffff); /* 64-bit mask */
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const u64 mpoly = UINT64_C(0x1fffffff1fffffff); /* Poly key mask */
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#ifdef __LITTLE_ENDIAN
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#define INDEX_HIGH 1
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#define INDEX_LOW 0
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#else
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#define INDEX_HIGH 0
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#define INDEX_LOW 1
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#endif
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/*
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* The following routines are used in this implementation. They are
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* written via macros to simulate zero-overhead call-by-reference.
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*
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* MUL64: 64x64->128-bit multiplication
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* PMUL64: assumes top bits cleared on inputs
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* ADD128: 128x128->128-bit addition
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*/
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#define ADD128(rh, rl, ih, il) \
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do { \
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u64 _il = (il); \
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(rl) += (_il); \
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if ((rl) < (_il)) \
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(rh)++; \
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(rh) += (ih); \
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} while (0)
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#define MUL32(i1, i2) ((u64)(u32)(i1)*(u32)(i2))
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#define PMUL64(rh, rl, i1, i2) /* Assumes m doesn't overflow */ \
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do { \
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u64 _i1 = (i1), _i2 = (i2); \
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u64 m = MUL32(_i1, _i2>>32) + MUL32(_i1>>32, _i2); \
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rh = MUL32(_i1>>32, _i2>>32); \
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rl = MUL32(_i1, _i2); \
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ADD128(rh, rl, (m >> 32), (m << 32)); \
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} while (0)
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#define MUL64(rh, rl, i1, i2) \
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do { \
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u64 _i1 = (i1), _i2 = (i2); \
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u64 m1 = MUL32(_i1, _i2>>32); \
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u64 m2 = MUL32(_i1>>32, _i2); \
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rh = MUL32(_i1>>32, _i2>>32); \
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rl = MUL32(_i1, _i2); \
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ADD128(rh, rl, (m1 >> 32), (m1 << 32)); \
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ADD128(rh, rl, (m2 >> 32), (m2 << 32)); \
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} while (0)
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/*
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* For highest performance the L1 NH and L2 polynomial hashes should be
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* carefully implemented to take advantage of one's target architechture.
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* Here these two hash functions are defined multiple time; once for
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* 64-bit architectures, once for 32-bit SSE2 architectures, and once
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* for the rest (32-bit) architectures.
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* For each, nh_16 *must* be defined (works on multiples of 16 bytes).
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* Optionally, nh_vmac_nhbytes can be defined (for multiples of
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* VMAC_NHBYTES), and nh_16_2 and nh_vmac_nhbytes_2 (versions that do two
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* NH computations at once).
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*/
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#ifdef CONFIG_64BIT
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#define nh_16(mp, kp, nw, rh, rl) \
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do { \
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int i; u64 th, tl; \
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rh = rl = 0; \
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for (i = 0; i < nw; i += 2) { \
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MUL64(th, tl, le64_to_cpup((mp)+i)+(kp)[i], \
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le64_to_cpup((mp)+i+1)+(kp)[i+1]); \
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ADD128(rh, rl, th, tl); \
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} \
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} while (0)
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#define nh_16_2(mp, kp, nw, rh, rl, rh1, rl1) \
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do { \
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int i; u64 th, tl; \
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rh1 = rl1 = rh = rl = 0; \
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for (i = 0; i < nw; i += 2) { \
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MUL64(th, tl, le64_to_cpup((mp)+i)+(kp)[i], \
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le64_to_cpup((mp)+i+1)+(kp)[i+1]); \
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ADD128(rh, rl, th, tl); \
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MUL64(th, tl, le64_to_cpup((mp)+i)+(kp)[i+2], \
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le64_to_cpup((mp)+i+1)+(kp)[i+3]); \
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ADD128(rh1, rl1, th, tl); \
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} \
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} while (0)
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#if (VMAC_NHBYTES >= 64) /* These versions do 64-bytes of message at a time */
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#define nh_vmac_nhbytes(mp, kp, nw, rh, rl) \
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do { \
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int i; u64 th, tl; \
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rh = rl = 0; \
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for (i = 0; i < nw; i += 8) { \
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MUL64(th, tl, le64_to_cpup((mp)+i)+(kp)[i], \
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le64_to_cpup((mp)+i+1)+(kp)[i+1]); \
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ADD128(rh, rl, th, tl); \
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MUL64(th, tl, le64_to_cpup((mp)+i+2)+(kp)[i+2], \
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le64_to_cpup((mp)+i+3)+(kp)[i+3]); \
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ADD128(rh, rl, th, tl); \
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MUL64(th, tl, le64_to_cpup((mp)+i+4)+(kp)[i+4], \
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le64_to_cpup((mp)+i+5)+(kp)[i+5]); \
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ADD128(rh, rl, th, tl); \
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MUL64(th, tl, le64_to_cpup((mp)+i+6)+(kp)[i+6], \
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le64_to_cpup((mp)+i+7)+(kp)[i+7]); \
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ADD128(rh, rl, th, tl); \
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} \
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} while (0)
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#define nh_vmac_nhbytes_2(mp, kp, nw, rh, rl, rh1, rl1) \
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do { \
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int i; u64 th, tl; \
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rh1 = rl1 = rh = rl = 0; \
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for (i = 0; i < nw; i += 8) { \
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MUL64(th, tl, le64_to_cpup((mp)+i)+(kp)[i], \
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le64_to_cpup((mp)+i+1)+(kp)[i+1]); \
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ADD128(rh, rl, th, tl); \
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MUL64(th, tl, le64_to_cpup((mp)+i)+(kp)[i+2], \
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le64_to_cpup((mp)+i+1)+(kp)[i+3]); \
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ADD128(rh1, rl1, th, tl); \
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MUL64(th, tl, le64_to_cpup((mp)+i+2)+(kp)[i+2], \
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le64_to_cpup((mp)+i+3)+(kp)[i+3]); \
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ADD128(rh, rl, th, tl); \
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MUL64(th, tl, le64_to_cpup((mp)+i+2)+(kp)[i+4], \
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le64_to_cpup((mp)+i+3)+(kp)[i+5]); \
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ADD128(rh1, rl1, th, tl); \
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MUL64(th, tl, le64_to_cpup((mp)+i+4)+(kp)[i+4], \
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le64_to_cpup((mp)+i+5)+(kp)[i+5]); \
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ADD128(rh, rl, th, tl); \
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MUL64(th, tl, le64_to_cpup((mp)+i+4)+(kp)[i+6], \
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le64_to_cpup((mp)+i+5)+(kp)[i+7]); \
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ADD128(rh1, rl1, th, tl); \
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MUL64(th, tl, le64_to_cpup((mp)+i+6)+(kp)[i+6], \
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le64_to_cpup((mp)+i+7)+(kp)[i+7]); \
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ADD128(rh, rl, th, tl); \
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MUL64(th, tl, le64_to_cpup((mp)+i+6)+(kp)[i+8], \
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le64_to_cpup((mp)+i+7)+(kp)[i+9]); \
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ADD128(rh1, rl1, th, tl); \
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} \
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} while (0)
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#endif
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#define poly_step(ah, al, kh, kl, mh, ml) \
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do { \
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u64 t1h, t1l, t2h, t2l, t3h, t3l, z = 0; \
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/* compute ab*cd, put bd into result registers */ \
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PMUL64(t3h, t3l, al, kh); \
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PMUL64(t2h, t2l, ah, kl); \
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PMUL64(t1h, t1l, ah, 2*kh); \
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PMUL64(ah, al, al, kl); \
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/* add 2 * ac to result */ \
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ADD128(ah, al, t1h, t1l); \
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/* add together ad + bc */ \
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ADD128(t2h, t2l, t3h, t3l); \
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/* now (ah,al), (t2l,2*t2h) need summing */ \
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/* first add the high registers, carrying into t2h */ \
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ADD128(t2h, ah, z, t2l); \
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/* double t2h and add top bit of ah */ \
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t2h = 2 * t2h + (ah >> 63); \
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ah &= m63; \
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/* now add the low registers */ \
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ADD128(ah, al, mh, ml); \
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ADD128(ah, al, z, t2h); \
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} while (0)
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#else /* ! CONFIG_64BIT */
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#ifndef nh_16
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#define nh_16(mp, kp, nw, rh, rl) \
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do { \
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u64 t1, t2, m1, m2, t; \
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int i; \
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rh = rl = t = 0; \
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for (i = 0; i < nw; i += 2) { \
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t1 = le64_to_cpup(mp+i) + kp[i]; \
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t2 = le64_to_cpup(mp+i+1) + kp[i+1]; \
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m2 = MUL32(t1 >> 32, t2); \
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m1 = MUL32(t1, t2 >> 32); \
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ADD128(rh, rl, MUL32(t1 >> 32, t2 >> 32), \
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MUL32(t1, t2)); \
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rh += (u64)(u32)(m1 >> 32) \
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+ (u32)(m2 >> 32); \
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t += (u64)(u32)m1 + (u32)m2; \
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} \
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ADD128(rh, rl, (t >> 32), (t << 32)); \
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} while (0)
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#endif
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static void poly_step_func(u64 *ahi, u64 *alo,
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const u64 *kh, const u64 *kl,
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const u64 *mh, const u64 *ml)
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{
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#define a0 (*(((u32 *)alo)+INDEX_LOW))
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#define a1 (*(((u32 *)alo)+INDEX_HIGH))
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#define a2 (*(((u32 *)ahi)+INDEX_LOW))
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#define a3 (*(((u32 *)ahi)+INDEX_HIGH))
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#define k0 (*(((u32 *)kl)+INDEX_LOW))
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#define k1 (*(((u32 *)kl)+INDEX_HIGH))
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#define k2 (*(((u32 *)kh)+INDEX_LOW))
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#define k3 (*(((u32 *)kh)+INDEX_HIGH))
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u64 p, q, t;
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u32 t2;
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p = MUL32(a3, k3);
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p += p;
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p += *(u64 *)mh;
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p += MUL32(a0, k2);
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p += MUL32(a1, k1);
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p += MUL32(a2, k0);
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t = (u32)(p);
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p >>= 32;
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p += MUL32(a0, k3);
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p += MUL32(a1, k2);
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p += MUL32(a2, k1);
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p += MUL32(a3, k0);
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t |= ((u64)((u32)p & 0x7fffffff)) << 32;
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p >>= 31;
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p += (u64)(((u32 *)ml)[INDEX_LOW]);
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p += MUL32(a0, k0);
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q = MUL32(a1, k3);
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q += MUL32(a2, k2);
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q += MUL32(a3, k1);
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q += q;
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p += q;
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t2 = (u32)(p);
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p >>= 32;
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p += (u64)(((u32 *)ml)[INDEX_HIGH]);
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p += MUL32(a0, k1);
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p += MUL32(a1, k0);
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q = MUL32(a2, k3);
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q += MUL32(a3, k2);
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q += q;
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p += q;
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*(u64 *)(alo) = (p << 32) | t2;
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p >>= 32;
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*(u64 *)(ahi) = p + t;
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#undef a0
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#undef a1
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#undef a2
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#undef a3
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#undef k0
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#undef k1
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#undef k2
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#undef k3
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}
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#define poly_step(ah, al, kh, kl, mh, ml) \
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poly_step_func(&(ah), &(al), &(kh), &(kl), &(mh), &(ml))
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#endif /* end of specialized NH and poly definitions */
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/* At least nh_16 is defined. Defined others as needed here */
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#ifndef nh_16_2
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#define nh_16_2(mp, kp, nw, rh, rl, rh2, rl2) \
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do { \
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nh_16(mp, kp, nw, rh, rl); \
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nh_16(mp, ((kp)+2), nw, rh2, rl2); \
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} while (0)
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#endif
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#ifndef nh_vmac_nhbytes
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#define nh_vmac_nhbytes(mp, kp, nw, rh, rl) \
|
||||
nh_16(mp, kp, nw, rh, rl)
|
||||
#endif
|
||||
#ifndef nh_vmac_nhbytes_2
|
||||
#define nh_vmac_nhbytes_2(mp, kp, nw, rh, rl, rh2, rl2) \
|
||||
do { \
|
||||
nh_vmac_nhbytes(mp, kp, nw, rh, rl); \
|
||||
nh_vmac_nhbytes(mp, ((kp)+2), nw, rh2, rl2); \
|
||||
} while (0)
|
||||
#endif
|
||||
|
||||
static void vhash_abort(struct vmac_ctx *ctx)
|
||||
{
|
||||
ctx->polytmp[0] = ctx->polykey[0] ;
|
||||
ctx->polytmp[1] = ctx->polykey[1] ;
|
||||
ctx->first_block_processed = 0;
|
||||
}
|
||||
|
||||
static u64 l3hash(u64 p1, u64 p2,
|
||||
u64 k1, u64 k2, u64 len)
|
||||
{
|
||||
u64 rh, rl, t, z = 0;
|
||||
|
||||
/* fully reduce (p1,p2)+(len,0) mod p127 */
|
||||
t = p1 >> 63;
|
||||
p1 &= m63;
|
||||
ADD128(p1, p2, len, t);
|
||||
/* At this point, (p1,p2) is at most 2^127+(len<<64) */
|
||||
t = (p1 > m63) + ((p1 == m63) && (p2 == m64));
|
||||
ADD128(p1, p2, z, t);
|
||||
p1 &= m63;
|
||||
|
||||
/* compute (p1,p2)/(2^64-2^32) and (p1,p2)%(2^64-2^32) */
|
||||
t = p1 + (p2 >> 32);
|
||||
t += (t >> 32);
|
||||
t += (u32)t > 0xfffffffeu;
|
||||
p1 += (t >> 32);
|
||||
p2 += (p1 << 32);
|
||||
|
||||
/* compute (p1+k1)%p64 and (p2+k2)%p64 */
|
||||
p1 += k1;
|
||||
p1 += (0 - (p1 < k1)) & 257;
|
||||
p2 += k2;
|
||||
p2 += (0 - (p2 < k2)) & 257;
|
||||
|
||||
/* compute (p1+k1)*(p2+k2)%p64 */
|
||||
MUL64(rh, rl, p1, p2);
|
||||
t = rh >> 56;
|
||||
ADD128(t, rl, z, rh);
|
||||
rh <<= 8;
|
||||
ADD128(t, rl, z, rh);
|
||||
t += t << 8;
|
||||
rl += t;
|
||||
rl += (0 - (rl < t)) & 257;
|
||||
rl += (0 - (rl > p64-1)) & 257;
|
||||
return rl;
|
||||
}
|
||||
|
||||
static void vhash_update(const unsigned char *m,
|
||||
unsigned int mbytes, /* Pos multiple of VMAC_NHBYTES */
|
||||
struct vmac_ctx *ctx)
|
||||
{
|
||||
u64 rh, rl, *mptr;
|
||||
const u64 *kptr = (u64 *)ctx->nhkey;
|
||||
int i;
|
||||
u64 ch, cl;
|
||||
u64 pkh = ctx->polykey[0];
|
||||
u64 pkl = ctx->polykey[1];
|
||||
|
||||
mptr = (u64 *)m;
|
||||
i = mbytes / VMAC_NHBYTES; /* Must be non-zero */
|
||||
|
||||
ch = ctx->polytmp[0];
|
||||
cl = ctx->polytmp[1];
|
||||
|
||||
if (!ctx->first_block_processed) {
|
||||
ctx->first_block_processed = 1;
|
||||
nh_vmac_nhbytes(mptr, kptr, VMAC_NHBYTES/8, rh, rl);
|
||||
rh &= m62;
|
||||
ADD128(ch, cl, rh, rl);
|
||||
mptr += (VMAC_NHBYTES/sizeof(u64));
|
||||
i--;
|
||||
}
|
||||
|
||||
while (i--) {
|
||||
nh_vmac_nhbytes(mptr, kptr, VMAC_NHBYTES/8, rh, rl);
|
||||
rh &= m62;
|
||||
poly_step(ch, cl, pkh, pkl, rh, rl);
|
||||
mptr += (VMAC_NHBYTES/sizeof(u64));
|
||||
}
|
||||
|
||||
ctx->polytmp[0] = ch;
|
||||
ctx->polytmp[1] = cl;
|
||||
}
|
||||
|
||||
static u64 vhash(unsigned char m[], unsigned int mbytes,
|
||||
u64 *tagl, struct vmac_ctx *ctx)
|
||||
{
|
||||
u64 rh, rl, *mptr;
|
||||
const u64 *kptr = (u64 *)ctx->nhkey;
|
||||
int i, remaining;
|
||||
u64 ch, cl;
|
||||
u64 pkh = ctx->polykey[0];
|
||||
u64 pkl = ctx->polykey[1];
|
||||
|
||||
mptr = (u64 *)m;
|
||||
i = mbytes / VMAC_NHBYTES;
|
||||
remaining = mbytes % VMAC_NHBYTES;
|
||||
|
||||
if (ctx->first_block_processed) {
|
||||
ch = ctx->polytmp[0];
|
||||
cl = ctx->polytmp[1];
|
||||
} else if (i) {
|
||||
nh_vmac_nhbytes(mptr, kptr, VMAC_NHBYTES/8, ch, cl);
|
||||
ch &= m62;
|
||||
ADD128(ch, cl, pkh, pkl);
|
||||
mptr += (VMAC_NHBYTES/sizeof(u64));
|
||||
i--;
|
||||
} else if (remaining) {
|
||||
nh_16(mptr, kptr, 2*((remaining+15)/16), ch, cl);
|
||||
ch &= m62;
|
||||
ADD128(ch, cl, pkh, pkl);
|
||||
mptr += (VMAC_NHBYTES/sizeof(u64));
|
||||
goto do_l3;
|
||||
} else {/* Empty String */
|
||||
ch = pkh; cl = pkl;
|
||||
goto do_l3;
|
||||
}
|
||||
|
||||
while (i--) {
|
||||
nh_vmac_nhbytes(mptr, kptr, VMAC_NHBYTES/8, rh, rl);
|
||||
rh &= m62;
|
||||
poly_step(ch, cl, pkh, pkl, rh, rl);
|
||||
mptr += (VMAC_NHBYTES/sizeof(u64));
|
||||
}
|
||||
if (remaining) {
|
||||
nh_16(mptr, kptr, 2*((remaining+15)/16), rh, rl);
|
||||
rh &= m62;
|
||||
poly_step(ch, cl, pkh, pkl, rh, rl);
|
||||
}
|
||||
|
||||
do_l3:
|
||||
vhash_abort(ctx);
|
||||
remaining *= 8;
|
||||
return l3hash(ch, cl, ctx->l3key[0], ctx->l3key[1], remaining);
|
||||
}
|
||||
|
||||
static u64 vmac(unsigned char m[], unsigned int mbytes,
|
||||
unsigned char n[16], u64 *tagl,
|
||||
struct vmac_ctx_t *ctx)
|
||||
{
|
||||
u64 *in_n, *out_p;
|
||||
u64 p, h;
|
||||
int i;
|
||||
|
||||
in_n = ctx->__vmac_ctx.cached_nonce;
|
||||
out_p = ctx->__vmac_ctx.cached_aes;
|
||||
|
||||
i = n[15] & 1;
|
||||
if ((*(u64 *)(n+8) != in_n[1]) || (*(u64 *)(n) != in_n[0])) {
|
||||
in_n[0] = *(u64 *)(n);
|
||||
in_n[1] = *(u64 *)(n+8);
|
||||
((unsigned char *)in_n)[15] &= 0xFE;
|
||||
crypto_cipher_encrypt_one(ctx->child,
|
||||
(unsigned char *)out_p, (unsigned char *)in_n);
|
||||
|
||||
((unsigned char *)in_n)[15] |= (unsigned char)(1-i);
|
||||
}
|
||||
p = be64_to_cpup(out_p + i);
|
||||
h = vhash(m, mbytes, (u64 *)0, &ctx->__vmac_ctx);
|
||||
return p + h;
|
||||
}
|
||||
|
||||
static int vmac_set_key(unsigned char user_key[], struct vmac_ctx_t *ctx)
|
||||
{
|
||||
u64 in[2] = {0}, out[2];
|
||||
unsigned i;
|
||||
int err = 0;
|
||||
|
||||
err = crypto_cipher_setkey(ctx->child, user_key, VMAC_KEY_LEN);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
/* Fill nh key */
|
||||
((unsigned char *)in)[0] = 0x80;
|
||||
for (i = 0; i < sizeof(ctx->__vmac_ctx.nhkey)/8; i += 2) {
|
||||
crypto_cipher_encrypt_one(ctx->child,
|
||||
(unsigned char *)out, (unsigned char *)in);
|
||||
ctx->__vmac_ctx.nhkey[i] = be64_to_cpup(out);
|
||||
ctx->__vmac_ctx.nhkey[i+1] = be64_to_cpup(out+1);
|
||||
((unsigned char *)in)[15] += 1;
|
||||
}
|
||||
|
||||
/* Fill poly key */
|
||||
((unsigned char *)in)[0] = 0xC0;
|
||||
in[1] = 0;
|
||||
for (i = 0; i < sizeof(ctx->__vmac_ctx.polykey)/8; i += 2) {
|
||||
crypto_cipher_encrypt_one(ctx->child,
|
||||
(unsigned char *)out, (unsigned char *)in);
|
||||
ctx->__vmac_ctx.polytmp[i] =
|
||||
ctx->__vmac_ctx.polykey[i] =
|
||||
be64_to_cpup(out) & mpoly;
|
||||
ctx->__vmac_ctx.polytmp[i+1] =
|
||||
ctx->__vmac_ctx.polykey[i+1] =
|
||||
be64_to_cpup(out+1) & mpoly;
|
||||
((unsigned char *)in)[15] += 1;
|
||||
}
|
||||
|
||||
/* Fill ip key */
|
||||
((unsigned char *)in)[0] = 0xE0;
|
||||
in[1] = 0;
|
||||
for (i = 0; i < sizeof(ctx->__vmac_ctx.l3key)/8; i += 2) {
|
||||
do {
|
||||
crypto_cipher_encrypt_one(ctx->child,
|
||||
(unsigned char *)out, (unsigned char *)in);
|
||||
ctx->__vmac_ctx.l3key[i] = be64_to_cpup(out);
|
||||
ctx->__vmac_ctx.l3key[i+1] = be64_to_cpup(out+1);
|
||||
((unsigned char *)in)[15] += 1;
|
||||
} while (ctx->__vmac_ctx.l3key[i] >= p64
|
||||
|| ctx->__vmac_ctx.l3key[i+1] >= p64);
|
||||
}
|
||||
|
||||
/* Invalidate nonce/aes cache and reset other elements */
|
||||
ctx->__vmac_ctx.cached_nonce[0] = (u64)-1; /* Ensure illegal nonce */
|
||||
ctx->__vmac_ctx.cached_nonce[1] = (u64)0; /* Ensure illegal nonce */
|
||||
ctx->__vmac_ctx.first_block_processed = 0;
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static int vmac_setkey(struct crypto_shash *parent,
|
||||
const u8 *key, unsigned int keylen)
|
||||
{
|
||||
struct vmac_ctx_t *ctx = crypto_shash_ctx(parent);
|
||||
|
||||
if (keylen != VMAC_KEY_LEN) {
|
||||
crypto_shash_set_flags(parent, CRYPTO_TFM_RES_BAD_KEY_LEN);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
return vmac_set_key((u8 *)key, ctx);
|
||||
}
|
||||
|
||||
static int vmac_init(struct shash_desc *pdesc)
|
||||
{
|
||||
struct crypto_shash *parent = pdesc->tfm;
|
||||
struct vmac_ctx_t *ctx = crypto_shash_ctx(parent);
|
||||
|
||||
memset(&ctx->__vmac_ctx, 0, sizeof(struct vmac_ctx));
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int vmac_update(struct shash_desc *pdesc, const u8 *p,
|
||||
unsigned int len)
|
||||
{
|
||||
struct crypto_shash *parent = pdesc->tfm;
|
||||
struct vmac_ctx_t *ctx = crypto_shash_ctx(parent);
|
||||
|
||||
vhash_update(p, len, &ctx->__vmac_ctx);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int vmac_final(struct shash_desc *pdesc, u8 *out)
|
||||
{
|
||||
struct crypto_shash *parent = pdesc->tfm;
|
||||
struct vmac_ctx_t *ctx = crypto_shash_ctx(parent);
|
||||
vmac_t mac;
|
||||
u8 nonce[16] = {};
|
||||
|
||||
mac = vmac(NULL, 0, nonce, NULL, ctx);
|
||||
memcpy(out, &mac, sizeof(vmac_t));
|
||||
memset(&mac, 0, sizeof(vmac_t));
|
||||
memset(&ctx->__vmac_ctx, 0, sizeof(struct vmac_ctx));
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int vmac_init_tfm(struct crypto_tfm *tfm)
|
||||
{
|
||||
struct crypto_cipher *cipher;
|
||||
struct crypto_instance *inst = (void *)tfm->__crt_alg;
|
||||
struct crypto_spawn *spawn = crypto_instance_ctx(inst);
|
||||
struct vmac_ctx_t *ctx = crypto_tfm_ctx(tfm);
|
||||
|
||||
cipher = crypto_spawn_cipher(spawn);
|
||||
if (IS_ERR(cipher))
|
||||
return PTR_ERR(cipher);
|
||||
|
||||
ctx->child = cipher;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void vmac_exit_tfm(struct crypto_tfm *tfm)
|
||||
{
|
||||
struct vmac_ctx_t *ctx = crypto_tfm_ctx(tfm);
|
||||
crypto_free_cipher(ctx->child);
|
||||
}
|
||||
|
||||
static int vmac_create(struct crypto_template *tmpl, struct rtattr **tb)
|
||||
{
|
||||
struct shash_instance *inst;
|
||||
struct crypto_alg *alg;
|
||||
int err;
|
||||
|
||||
err = crypto_check_attr_type(tb, CRYPTO_ALG_TYPE_SHASH);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
alg = crypto_get_attr_alg(tb, CRYPTO_ALG_TYPE_CIPHER,
|
||||
CRYPTO_ALG_TYPE_MASK);
|
||||
if (IS_ERR(alg))
|
||||
return PTR_ERR(alg);
|
||||
|
||||
inst = shash_alloc_instance("vmac", alg);
|
||||
err = PTR_ERR(inst);
|
||||
if (IS_ERR(inst))
|
||||
goto out_put_alg;
|
||||
|
||||
err = crypto_init_spawn(shash_instance_ctx(inst), alg,
|
||||
shash_crypto_instance(inst),
|
||||
CRYPTO_ALG_TYPE_MASK);
|
||||
if (err)
|
||||
goto out_free_inst;
|
||||
|
||||
inst->alg.base.cra_priority = alg->cra_priority;
|
||||
inst->alg.base.cra_blocksize = alg->cra_blocksize;
|
||||
inst->alg.base.cra_alignmask = alg->cra_alignmask;
|
||||
|
||||
inst->alg.digestsize = sizeof(vmac_t);
|
||||
inst->alg.base.cra_ctxsize = sizeof(struct vmac_ctx_t);
|
||||
inst->alg.base.cra_init = vmac_init_tfm;
|
||||
inst->alg.base.cra_exit = vmac_exit_tfm;
|
||||
|
||||
inst->alg.init = vmac_init;
|
||||
inst->alg.update = vmac_update;
|
||||
inst->alg.final = vmac_final;
|
||||
inst->alg.setkey = vmac_setkey;
|
||||
|
||||
err = shash_register_instance(tmpl, inst);
|
||||
if (err) {
|
||||
out_free_inst:
|
||||
shash_free_instance(shash_crypto_instance(inst));
|
||||
}
|
||||
|
||||
out_put_alg:
|
||||
crypto_mod_put(alg);
|
||||
return err;
|
||||
}
|
||||
|
||||
static struct crypto_template vmac_tmpl = {
|
||||
.name = "vmac",
|
||||
.create = vmac_create,
|
||||
.free = shash_free_instance,
|
||||
.module = THIS_MODULE,
|
||||
};
|
||||
|
||||
static int __init vmac_module_init(void)
|
||||
{
|
||||
return crypto_register_template(&vmac_tmpl);
|
||||
}
|
||||
|
||||
static void __exit vmac_module_exit(void)
|
||||
{
|
||||
crypto_unregister_template(&vmac_tmpl);
|
||||
}
|
||||
|
||||
module_init(vmac_module_init);
|
||||
module_exit(vmac_module_exit);
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_DESCRIPTION("VMAC hash algorithm");
|
||||
|
||||
61
include/crypto/vmac.h
Normal file
61
include/crypto/vmac.h
Normal file
|
|
@ -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 */
|
||||
Loading…
Reference in a new issue