Commit Graph

506 Commits

Author SHA1 Message Date
Herbert Xu ff753308d2 crypto: api - crypto_alg_mod_lookup either tested or untested
As it stands crypto_alg_mod_lookup will search either tested or
untested algorithms, but never both at the same time.  However,
we need exactly that when constructing givcipher and aead so
this patch adds support for that by setting the tested bit in
type but clearing it in mask.  This combination is currently
unused.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-02-18 16:49:43 +08:00
Neil Horman c5b1e545a5 crypto: ansi_cprng - Panic on CPRNG test failure when in FIPS mode
FIPS 140-2 specifies that all access to various cryptographic modules be
prevented in the event that any of the provided self tests fail on the various
implemented algorithms.  We already panic when any of the test in testmgr.c
fail when we are operating in fips mode.  The continuous test in the cprng here
was missed when that was implmented.  This code simply checks for the
fips_enabled flag if the test fails, and warns us via syslog or panics the box
accordingly.

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-02-18 16:48:07 +08:00
Neil Horman d7992f42c6 crypto: ansi_cprng - Force reset on allocation
Pseudo RNGs provide predictable outputs based on input parateters {key, V, DT},
the idea behind them is that only the user should know what the inputs are.
While its nice to have default known values for testing purposes, it seems
dangerous to allow the use of those default values without some sort of safety
measure in place, lest an attacker easily guess the output of the cprng.  This
patch forces the NEED_RESET flag on when allocating a cprng context, so that any
user is forced to reseed it before use.  The defaults can still be used for
testing, but this will prevent their inadvertent use, and be more secure.
   
Signed-off-by: Neil Horman <nhorman@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-02-18 16:48:06 +08:00
Huang Ying 54b6a1bd53 crypto: aes-ni - Add support to Intel AES-NI instructions for x86_64 platform
Intel AES-NI is a new set of Single Instruction Multiple Data (SIMD)
instructions that are going to be introduced in the next generation of
Intel processor, as of 2009. These instructions enable fast and secure
data encryption and decryption, using the Advanced Encryption Standard
(AES), defined by FIPS Publication number 197.  The architecture
introduces six instructions that offer full hardware support for
AES. Four of them support high performance data encryption and
decryption, and the other two instructions support the AES key
expansion procedure.

The white paper can be downloaded from:

http://softwarecommunity.intel.com/isn/downloads/intelavx/AES-Instructions-Set_WP.pdf

AES may be used in soft_irq context, but MMX/SSE context can not be
touched safely in soft_irq context. So in_interrupt() is checked, if
in IRQ or soft_irq context, the general x86_64 implementation are used
instead.

Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-02-18 16:48:06 +08:00
Huang Ying 1cac2cbc76 crypto: cryptd - Add support to access underlying blkcipher
cryptd_alloc_ablkcipher() will allocate a cryptd-ed ablkcipher for
specified algorithm name. The new allocated one is guaranteed to be
cryptd-ed ablkcipher, so the blkcipher underlying can be gotten via
cryptd_ablkcipher_child().

Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-02-18 16:48:05 +08:00
Herbert Xu 1693531e9e crypto: shash - Remove superfluous check in init_tfm
We're currently checking the frontend type in init_tfm.  This is
completely pointless because the fact that we're called at all
means that the frontend is ours so the type must match as well.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-02-18 16:48:05 +08:00
Herbert Xu 8eb2dfac41 crypto: lrw - Fix big endian support
It turns out that LRW has never worked properly on big endian.
This was never discussed because nobody actually used it that
way.  In fact, it was only discovered when Geert Uytterhoeven
loaded it through tcrypt which failed the test on it.

The fix is straightforward, on big endian the to find the nth
bit we should be grouping them by words instead of bytes.  So
setbit128_bbe should xor with 128 - BITS_PER_LONG instead of
128 - BITS_PER_BYTE == 0x78.

Tested-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-02-17 20:00:11 +08:00
Herbert Xu 4f3e797ad0 crypto: scatterwalk - Avoid flush_dcache_page on slab pages
It's illegal to call flush_dcache_page on slab pages on a number
of architectures.  So this patch avoids doing so if PageSlab is
true.

In future we can move the flush_dcache_page call to those page
cache users that actually need it.

Reported-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-02-09 14:30:25 +11:00
Herbert Xu 7b2cd92adc crypto: api - Fix zeroing on free
Geert Uytterhoeven pointed out that we're not zeroing all the
memory when freeing a transform.  This patch fixes it by calling
ksize to ensure that we zero everything in sight.

Reported-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-02-05 16:48:53 +11:00
Adrian-Ken Rueegsegger 4abfd73e34 crypto: shash - Fix module refcount
Module reference counting for shash is incorrect: when
a new shash transformation is created the refcount is not
increased as it should.

Signed-off-by: Adrian-Ken Rueegsegger <rueegsegger@swiss-it.ch>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-02-05 16:19:31 +11:00
Herbert Xu b8e15992b4 crypto: api - Fix algorithm test race that broke aead initialisation
When we complete a test we'll notify everyone waiting on it, drop
the mutex, and then remove the test larval (after reacquiring the
mutex).  If one of the notified parties tries to register another
algorithm with the same driver name prior to the removal of the
test larval, they will fail with EEXIST as only one algorithm of
a given name can be tested at any time.

This broke the initialisation of aead and givcipher algorithms as
they will register two algorithms with the same driver name, in
sequence.

This patch fixes the problem by marking the larval as dead before
we drop the mutex, and also ignoring all dead or dying algorithms
on the registration path.

Tested-by: Andreas Steffen <andreas.steffen@strongswan.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-01-28 14:09:59 +11:00
Jarod Wilson 516280e735 crypto: ccm - Fix handling of null assoc data
Its a valid use case to have null associated data in a ccm vector, but
this case isn't being handled properly right now.

The following ccm decryption/verification test vector, using the
rfc4309 implementation regularly triggers a panic, as will any
other vector with null assoc data:

* key: ab2f8a74b71cd2b1ff802e487d82f8b9
* iv: c6fb7d800d13abd8a6b2d8
* Associated Data: [NULL]
* Tag Length: 8
* input: d5e8939fc7892e2b

The resulting panic looks like so:

Unable to handle kernel paging request at ffff810064ddaec0 RIP: 
 [<ffffffff8864c4d7>] :ccm:get_data_to_compute+0x1a6/0x1d6
PGD 8063 PUD 0 
Oops: 0002 [1] SMP 
last sysfs file: /module/libata/version
CPU 0
Modules linked in: crypto_tester_kmod(U) seqiv krng ansi_cprng chainiv rng ctr aes_generic aes_x86_64 ccm cryptomgr testmgr_cipher testmgr aead crypto_blkcipher crypto_a
lgapi des ipv6 xfrm_nalgo crypto_api autofs4 hidp l2cap bluetooth nfs lockd fscache nfs_acl sunrpc ip_conntrack_netbios_ns ipt_REJECT xt_state ip_conntrack nfnetlink xt_
tcpudp iptable_filter ip_tables x_tables dm_mirror dm_log dm_multipath scsi_dh dm_mod video hwmon backlight sbs i2c_ec button battery asus_acpi acpi_memhotplug ac lp sg 
snd_intel8x0 snd_ac97_codec ac97_bus snd_seq_dummy snd_seq_oss joydev snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss ide_cd snd_pcm floppy parport_p
c shpchp e752x_edac snd_timer e1000 i2c_i801 edac_mc snd soundcore snd_page_alloc i2c_core cdrom parport serio_raw pcspkr ata_piix libata sd_mod scsi_mod ext3 jbd uhci_h
cd ohci_hcd ehci_hcd
Pid: 12844, comm: crypto-tester Tainted: G      2.6.18-128.el5.fips1 #1
RIP: 0010:[<ffffffff8864c4d7>]  [<ffffffff8864c4d7>] :ccm:get_data_to_compute+0x1a6/0x1d6
RSP: 0018:ffff8100134434e8  EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff8100104898b0 RCX: ffffffffab6aea10
RDX: 0000000000000010 RSI: ffff8100104898c0 RDI: ffff810064ddaec0
RBP: 0000000000000000 R08: ffff8100104898b0 R09: 0000000000000000
R10: ffff8100103bac84 R11: ffff8100104898b0 R12: ffff810010489858
R13: ffff8100104898b0 R14: ffff8100103bac00 R15: 0000000000000000
FS:  00002ab881adfd30(0000) GS:ffffffff803ac000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: ffff810064ddaec0 CR3: 0000000012a88000 CR4: 00000000000006e0
Process crypto-tester (pid: 12844, threadinfo ffff810013442000, task ffff81003d165860)
Stack:  ffff8100103bac00 ffff8100104898e8 ffff8100134436f8 ffffffff00000000
 0000000000000000 ffff8100104898b0 0000000000000000 ffff810010489858
 0000000000000000 ffff8100103bac00 ffff8100134436f8 ffffffff8864c634
Call Trace:
 [<ffffffff8864c634>] :ccm:crypto_ccm_auth+0x12d/0x140
 [<ffffffff8864cf73>] :ccm:crypto_ccm_decrypt+0x161/0x23a
 [<ffffffff88633643>] :crypto_tester_kmod:cavs_test_rfc4309_ccm+0x4a5/0x559
[...]

The above is from a RHEL5-based kernel, but upstream is susceptible too.

The fix is trivial: in crypto/ccm.c:crypto_ccm_auth(), pctx->ilen contains
whatever was in memory when pctx was allocated if assoclen is 0. The tested
fix is to simply add an else clause setting pctx->ilen to 0 for the
assoclen == 0 case, so that get_data_to_compute() doesn't try doing
things its not supposed to.

Signed-off-by: Jarod Wilson <jarod@redhat.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-01-27 17:11:15 +11:00
Herbert Xu bac1b5c469 crypto: blkcipher - Fix WARN_ON handling in walk_done
When we get left-over bits from a slow walk, it means that the
underlying cipher has gone troppo.  However, as we're handling
that case we should ensure that the caller terminates the walk.

This patch does this by setting walk->nbytes to zero.

Reported-by: Roel Kluin <roel.kluin@gmail.com>
Reported-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-01-27 17:11:13 +11:00
Herbert Xu 29b37f4212 crypto: authenc - Fix zero-length IV crash
As it is if an algorithm with a zero-length IV is used (e.g.,
NULL encryption) with authenc, authenc may generate an SG entry
of length zero, which will trigger a BUG check in the hash layer.

This patch fixes it by skipping the IV SG generation if the IV
size is zero.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-01-15 15:33:49 +11:00
Dan Williams 209b84a88f dmaengine: replace dma_async_client_register with dmaengine_get
Now that clients no longer need to be notified of channel arrival
dma_async_client_register can simply increment the dmaengine_ref_count.

Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2009-01-06 11:38:17 -07:00
Dan Williams 2ba05622b8 dmaengine: provide a common 'issue_pending_all' implementation
async_tx and net_dma each have open-coded versions of issue_pending_all,
so provide a common routine in dmaengine.

The implementation needs to walk the global device list, so implement
rcu to allow dma_issue_pending_all to run lockless.  Clients protect
themselves from channel removal events by holding a dmaengine reference.

Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2009-01-06 11:38:14 -07:00
Dan Williams bec085134e dmaengine: centralize channel allocation, introduce dma_find_channel
Allowing multiple clients to each define their own channel allocation
scheme quickly leads to a pathological situation.  For memory-to-memory
offload all clients can share a central allocator.

This simply moves the existing async_tx allocator to dmaengine with
minimal fixups:
* async_tx.c:get_chan_ref_by_cap --> dmaengine.c:nth_chan
* async_tx.c:async_tx_rebalance --> dmaengine.c:dma_channel_rebalance
* split out common code from async_tx.c:__async_tx_find_channel -->
  dma_find_channel

Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2009-01-06 11:38:14 -07:00
Dan Williams 6f49a57aa5 dmaengine: up-level reference counting to the module level
Simply, if a client wants any dmaengine channel then prevent all dmaengine
modules from being removed.  Once the clients are done re-enable module
removal.

Why?, beyond reducing complication:
1/ Tracking reference counts per-transaction in an efficient manner, as
   is currently done, requires a complicated scheme to avoid cache-line
   bouncing effects.
2/ Per-transaction ref-counting gives the false impression that a
   dma-driver can be gracefully removed ahead of its user (net, md, or
   dma-slave)
3/ None of the in-tree dma-drivers talk to hot pluggable hardware, but
   if such an engine were built one day we still would not need to notify
   clients of remove events.  The driver can simply return NULL to a
   ->prep() request, something that is much easier for a client to handle.

Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2009-01-06 11:38:14 -07:00
Dan Williams 07f2211e4f dmaengine: remove dependency on async_tx
async_tx.ko is a consumer of dma channels.  A circular dependency arises
if modules in drivers/dma rely on common code in async_tx.ko.  It
prevents either module from being unloaded.

Move dma_wait_for_async_tx and async_tx_run_dependencies to dmaeninge.o
where they should have been from the beginning.

Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2009-01-05 18:10:19 -07:00
Herbert Xu 0ee4a96902 crypto: aes - Precompute tables
The tables used by the various AES algorithms are currently
computed at run-time.  This has created an init ordering problem
because some AES algorithms may be registered before the tables
have been initialised.

This patch gets around this whole thing by precomputing the tables.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25 11:05:13 +11:00
Geert Uytterhoeven bcf84a38f0 crypto: testmgr - Correct comment about deflate parameters
The comment for the deflate test vectors says the winbits parameter is 11,
while the deflate module actually uses -11 (a negative window bits parameter
enables the raw deflate format instead of the zlib format).
Correct this, to avoid confusion about the format used.

Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25 11:02:32 +11:00
Harvey Harrison f0d1ec3a22 crypto: salsa20 - Remove private wrappers around various operations
ROTATE -> rol32
XOR was always used with the same destination, use ^=
PLUS/PLUSONE use ++ or +=

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25 11:02:30 +11:00
Jarod Wilson ad79cdd77f crypto: des3_ede - permit weak keys unless REQ_WEAK_KEY set
While its a slightly insane to bypass the key1 == key2 ||
key2 == key3 check in triple-des, since it reduces it to the
same strength as des, some folks do need to do this from time
to time for backwards compatibility with des.

My own case is FIPS CAVS test vectors. Many triple-des test
vectors use a single key, replicated 3x. In order to get the
expected results, des3_ede_setkey() needs to only reject weak
keys if the CRYPTO_TFM_REQ_WEAK_KEY flag is set.

Also sets a more appropriate RES flag when a weak key is found.

Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25 11:02:28 +11:00
Adrian-Ken Rueegsegger bd9d20dba1 crypto: sha512 - Switch to shash
This patch changes sha512 and sha384 to the new shash interface.

Signed-off-by: Adrian-Ken Rueegsegger <ken@codelabs.ch>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25 11:02:27 +11:00
Adrian-Ken Rueegsegger f9e2bca6c2 crypto: sha512 - Move message schedule W[80] to static percpu area
The message schedule W (u64[80]) is too big for the stack. In order
for this algorithm to be used with shash it is moved to a static
percpu area.

Signed-off-by: Adrian-Ken Rueegsegger <ken@codelabs.ch>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25 11:02:25 +11:00
Adrian-Ken Rueegsegger 19e2bf1467 crypto: michael_mic - Switch to shash
This patch changes michael_mic to the new shash interface.

Signed-off-by: Adrian-Ken Rueegsegger <ken@codelabs.ch>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25 11:02:24 +11:00
Adrian-Ken Rueegsegger 4946510baa crypto: wp512 - Switch to shash
This patch changes wp512, wp384 and wp256 to the new shash interface.

Signed-off-by: Adrian-Ken Rueegsegger <ken@codelabs.ch>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25 11:02:22 +11:00
Adrian-Ken Rueegsegger f63fbd3d50 crypto: tgr192 - Switch to shash
This patch changes tgr192, tgr160 and tgr128 to the new shash interface.

Signed-off-by: Adrian-Ken Rueegsegger <ken@codelabs.ch>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25 11:02:21 +11:00
Adrian-Ken Rueegsegger 50e109b5b9 crypto: sha256 - Switch to shash
This patch changes sha256 and sha224 to the new shash interface.

Signed-off-by: Adrian-Ken Rueegsegger <ken@codelabs.ch>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25 11:02:19 +11:00
Adrian-Ken Rueegsegger 14b75ba70d crypto: md5 - Switch to shash
This patch changes md5 to the new shash interface.

Signed-off-by: Adrian-Ken Rueegsegger <ken@codelabs.ch>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25 11:02:18 +11:00
Adrian-Ken Rueegsegger 808a1763ce crypto: md4 - Switch to shash
This patch changes md4 to the new shash interface.

Signed-off-by: Adrian-Ken Rueegsegger <ken@codelabs.ch>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25 11:02:16 +11:00
Adrian-Ken Rueegsegger 54ccb36776 crypto: sha1 - Switch to shash
This patch changes sha1 to the new shash interface.

Signed-off-by: Adrian-Ken Rueegsegger <ken@codelabs.ch>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25 11:02:15 +11:00
Herbert Xu 3b8efb4c41 crypto: rmd320 - Switch to shash
This patch changes rmd320 to the new shash interface.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25 11:02:13 +11:00
Herbert Xu d8a5e2e9f4 crypto: rmd256 - Switch to shash
This patch changes rmd256 to the new shash interface.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25 11:02:12 +11:00
Herbert Xu e5835fba02 crypto: rmd160 - Switch to shash
This patch changes rmd160 to the new shash interface.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25 11:02:10 +11:00
Herbert Xu 7c4468bc01 crypto: rmd128 - Switch to shash
This patch changes rmd128 to the new shash interface.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25 11:02:09 +11:00
Herbert Xu d35d2454ce crypto: null - Switch to shash
This patch changes digest_null to the new shash interface.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25 11:02:07 +11:00
Herbert Xu 3751f402e0 crypto: hash - Make setkey optional
Since most cryptographic hash algorithms have no keys, this patch
makes the setkey function optional for ahash and shash.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25 11:02:06 +11:00
Geert Uytterhoeven b812eb0076 crypto: testmgr - Validate output length in (de)compression tests
When self-testing (de)compression algorithms, make sure the actual size of
the (de)compressed output data matches the expected output size.
Otherwise, in case the actual output size would be smaller than the expected
output size, the subsequent buffer compare test would still succeed, and no
error would be reported.

Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25 11:02:04 +11:00
Harvey Harrison dad3df2044 crypto: remove uses of __constant_{endian} helpers
Base versions handle constant folding just fine.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25 11:02:03 +11:00
Ingo Molnar 664134d291 crypto: testmgr - Fix error flow of test_comp
This warning:

  crypto/testmgr.c: In function ‘test_comp’:
  crypto/testmgr.c:829: warning: ‘ret’ may be used uninitialized in this function

triggers because GCC correctly notices that in the ctcount == 0 &&
dtcount != 0 input condition case this function can return an undefined
value, if the second loop fails.

Remove the shadowed 'ret' variable from the second loop that was probably
unintended.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25 11:02:01 +11:00
Jarod Wilson 09fbf7c0f2 crypto: ansi_cprng - fix inverted DT increment routine
The ANSI X9.31 PRNG docs aren't particularly clear on how to increment DT,
but empirical testing shows we're incrementing from the wrong end. A 10,000
iteration Monte Carlo RNG test currently winds up not getting the expected
result.

From http://csrc.nist.gov/groups/STM/cavp/documents/rng/RNGVS.pdf :

# CAVS 4.3
# ANSI931 MCT
[X9.31]
[AES 128-Key]

COUNT = 0
Key = 9f5b51200bf334b5d82be8c37255c848
DT = 6376bbe52902ba3b67c925fa701f11ac
V = 572c8e76872647977e74fbddc49501d1
R = 48e9bd0d06ee18fbe45790d5c3fc9b73

Currently, we get 0dd08496c4f7178bfa70a2161a79459a after 10000 loops.

Inverting the DT increment routine results in us obtaining the expected result
of 48e9bd0d06ee18fbe45790d5c3fc9b73. Verified on both x86_64 and ppc64.

Signed-off-by: Jarod Wilson <jarod@redhat.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25 11:01:49 +11:00
Jarod Wilson aa1a85dbd1 crypto: ansi_cprng - Avoid incorrect extra call to _get_more_prng_bytes
While working with some FIPS RNGVS test vectors yesterday, I discovered a
little bug in the way the ansi_cprng code works right now.

For example, the following test vector (complete with expected result)
from http://csrc.nist.gov/groups/STM/cavp/documents/rng/RNGVS.pdf ...

Key = f3b1666d13607242ed061cabb8d46202
DT = e6b3be782a23fa62d71d4afbb0e922fc
V = f0000000000000000000000000000000
R = 88dda456302423e5f69da57e7b95c73a

...when run through ansi_cprng, yields an incorrect R value
of e2afe0d794120103d6e86a2b503bdfaa.

If I load up ansi_cprng w/dbg=1 though, it was fairly obvious what was
going wrong:

----8<----
getting 16 random bytes for context ffff810033fb2b10
Calling _get_more_prng_bytes for context ffff810033fb2b10
Input DT: 00000000: e6 b3 be 78 2a 23 fa 62 d7 1d 4a fb b0 e9 22 fc 
Input I: 00000000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
Input V: 00000000: f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
tmp stage 0: 00000000: e6 b3 be 78 2a 23 fa 62 d7 1d 4a fb b0 e9 22 fc 
tmp stage 1: 00000000: f4 8e cb 25 94 3e 8c 31 d6 14 cd 8a 23 f1 3f 84 
tmp stage 2: 00000000: 8c 53 6f 73 a4 1a af d4 20 89 68 f4 58 64 f8 be 
Returning new block for context ffff810033fb2b10
Output DT: 00000000: e7 b3 be 78 2a 23 fa 62 d7 1d 4a fb b0 e9 22 fc 
Output I: 00000000: 04 8e cb 25 94 3e 8c 31 d6 14 cd 8a 23 f1 3f 84 
Output V: 00000000: 48 89 3b 71 bc e4 00 b6 5e 21 ba 37 8a 0a d5 70 
New Random Data: 00000000: 88 dd a4 56 30 24 23 e5 f6 9d a5 7e 7b 95 c7 3a 
Calling _get_more_prng_bytes for context ffff810033fb2b10
Input DT: 00000000: e7 b3 be 78 2a 23 fa 62 d7 1d 4a fb b0 e9 22 fc 
Input I: 00000000: 04 8e cb 25 94 3e 8c 31 d6 14 cd 8a 23 f1 3f 84 
Input V: 00000000: 48 89 3b 71 bc e4 00 b6 5e 21 ba 37 8a 0a d5 70 
tmp stage 0: 00000000: e7 b3 be 78 2a 23 fa 62 d7 1d 4a fb b0 e9 22 fc 
tmp stage 1: 00000000: 80 6b 3a 8c 23 ae 8f 53 be 71 4c 16 fc 13 b2 ea 
tmp stage 2: 00000000: 2a 4d e1 2a 0b 58 8e e6 36 b8 9c 0a 26 22 b8 30 
Returning new block for context ffff810033fb2b10
Output DT: 00000000: e8 b3 be 78 2a 23 fa 62 d7 1d 4a fb b0 e9 22 fc 
Output I: 00000000: c8 e2 01 fd 9f 4a 8f e5 e0 50 f6 21 76 19 67 9a 
Output V: 00000000: ba 98 e3 75 c0 1b 81 8d 03 d6 f8 e2 0c c6 54 4b 
New Random Data: 00000000: e2 af e0 d7 94 12 01 03 d6 e8 6a 2b 50 3b df aa 
returning 16 from get_prng_bytes in context ffff810033fb2b10
----8<----

The expected result is there, in the first "New Random Data", but we're
incorrectly making a second call to _get_more_prng_bytes, due to some checks
that are slightly off, which resulted in our original bytes never being
returned anywhere.

One approach to fixing this would be to alter some byte_count checks in
get_prng_bytes, but it would mean the last DEFAULT_BLK_SZ bytes would be
copied a byte at a time, rather than in a single memcpy, so a slightly more
involved, equally functional, and ultimately more efficient way of fixing this
was suggested to me by Neil, which I'm submitting here. All of the RNGVS ANSI
X9.31 AES128 VST test vectors I've passed through ansi_cprng are now returning
the expected results with this change.

Signed-off-by: Jarod Wilson <jarod@redhat.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25 11:01:47 +11:00
Julia Lawall 31a61bfc6e crypto: md4 - Use ARRAY_SIZE
ARRAY_SIZE is more concise to use when the size of an array is divided by
the size of its type or the size of its first element.

The semantic patch that makes this change is as follows:
(http://www.emn.fr/x-info/coccinelle/)

// <smpl>
@i@
@@

#include <linux/kernel.h>

@depends on i using "paren.iso"@
type T;
T[] E;
@@

- (sizeof(E)/sizeof(T))
+ ARRAY_SIZE(E)
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25 11:01:45 +11:00
Herbert Xu 69c35efcf1 libcrc32c: Move implementation to crypto crc32c
This patch swaps the role of libcrc32c and crc32c.  Previously
the implementation was in libcrc32c and crc32c was a wrapper.
Now the code is in crc32c and libcrc32c just calls the crypto
layer.

The reason for the change is to tap into the algorithm selection
capability of the crypto API so that optimised implementations
such as the one utilising Intel's CRC32C instruction can be
used where available.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25 11:01:40 +11:00
Herbert Xu 8e3ee85e68 crypto: crc32c - Test descriptor context format
This patch adds a test for the requirement that all crc32c algorithms
shall store the partial result in the first four bytes of the descriptor
context.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25 11:01:38 +11:00
Herbert Xu faccc4bba1 crypto: crc32c - Switch to shash
This patch changes crc32c to the new shash interface.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25 11:01:35 +11:00
Herbert Xu 5f7082ed4f crypto: hash - Export shash through hash
This patch allows shash algorithms to be used through the old hash
interface.  This is a transitional measure so we can convert the
underlying algorithms to shash before converting the users across.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25 11:01:33 +11:00
Herbert Xu 67cd080c50 crypto: api - Call type show function before legacy for proc
This patch makes /proc/crypto call the type-specific show function
if one is present before calling the legacy show functions for
cipher/digest/compress.  This allows us to reuse the type values
for those legacy types.  In particular, hash and digest will share
one type value while shash is phased in as the default hash type.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25 11:01:32 +11:00
Herbert Xu dec8b78606 crypto: hash - Add import/export interface
It is often useful to save the partial state of a hash function
so that it can be used as a base for two or more computations.

The most prominent example is HMAC where all hashes start from
a base determined by the key.  Having an import/export interface
means that we only have to compute that base once rather than
for each message.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25 11:01:30 +11:00
Herbert Xu 3b2f6df082 crypto: hash - Export shash through ahash
This patch allows shash algorithms to be used through the ahash
interface.  This is required before we can convert digest algorithms
over to shash.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25 11:01:28 +11:00
Herbert Xu 7b5a080b3c crypto: hash - Add shash interface
The shash interface replaces the current synchronous hash interface.
It improves over hash in two ways.  Firstly shash is reentrant,
meaning that the same tfm may be used by two threads simultaneously
as all hashing state is stored in a local descriptor.

The other enhancement is that shash no longer takes scatter list
entries.  This is because shash is specifically designed for
synchronous algorithms and as such scatter lists are unnecessary.

All existing hash users will be converted to shash once the
algorithms have been completely converted.

There is also a new finup function that combines update with final.
This will be extended to ahash once the algorithm conversion is
done.

This is also the first time that an algorithm type has their own
registration function.  Existing algorithm types will be converted
to this way in due course.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25 11:01:26 +11:00
Herbert Xu 7b0bac64cd crypto: api - Rebirth of crypto_alloc_tfm
This patch reintroduces a completely revamped crypto_alloc_tfm.
The biggest change is that we now take two crypto_type objects
when allocating a tfm, a frontend and a backend.  In fact this
simply formalises what we've been doing behind the API's back.

For example, as it stands crypto_alloc_ahash may use an
actual ahash algorithm or a crypto_hash algorithm.  Putting
this in the API allows us to do this much more cleanly.

The existing types will be converted across gradually.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25 11:01:24 +11:00
Herbert Xu 4a7794860b crypto: api - Move type exit function into crypto_tfm
The type exit function needs to undo any allocations done by the type
init function.  However, the type init function may differ depending
on the upper-level type of the transform (e.g., a crypto_blkcipher
instantiated as a crypto_ablkcipher).

So we need to move the exit function out of the lower-level
structure and into crypto_tfm itself.

As it stands this is a no-op since nobody uses exit functions at
all.  However, all cases where a lower-level type is instantiated
as a different upper-level type (such as blkcipher as ablkcipher)
will be converted such that they allocate the underlying transform
and use that instead of casting (e.g., crypto_ablkcipher casted
into crypto_blkcipher).  That will need to use a different exit
function depending on the upper-level type.

This patch also allows the type init/exit functions to call (or not)
cra_init/cra_exit instead of always calling them from the top level.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25 11:01:23 +11:00
Neil Horman 2566578a6f crypto: ansi_cprng - Allow resetting of DT value
This is a patch that was sent to me by Jarod Wilson, marking off my
outstanding todo to allow the ansi cprng to set/reset the DT counter value in a
cprng instance.  Currently crytpo_rng_reset accepts a seed byte array which is
interpreted by the ansi_cprng as a {V key} tuple.  This patch extends that tuple
to now be {V key DT}, with DT an optional value during reset.  This patch also
fixes  a bug we noticed in which the offset of the key area of the seed is
started at DEFAULT_PRNG_KSZ rather than DEFAULT_BLK_SZ as it should be.

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25 11:01:21 +11:00
Harvey Harrison 32bd78e0a5 crypto: camellia - use kernel-provided bitops, unaligned access
Remove the private implementation of 32-bit rotation and unaligned
access with byteswapping.

As a bonus, fixes sparse warnings:
crypto/camellia.c:602:2: warning: cast to restricted __be32
crypto/camellia.c:603:2: warning: cast to restricted __be32
crypto/camellia.c:604:2: warning: cast to restricted __be32
crypto/camellia.c:605:2: warning: cast to restricted __be32
crypto/camellia.c:710:2: warning: cast to restricted __be32
crypto/camellia.c:711:2: warning: cast to restricted __be32
crypto/camellia.c:712:2: warning: cast to restricted __be32
crypto/camellia.c:713:2: warning: cast to restricted __be32
crypto/camellia.c:714:2: warning: cast to restricted __be32
crypto/camellia.c:715:2: warning: cast to restricted __be32
crypto/camellia.c:716:2: warning: cast to restricted __be32
crypto/camellia.c:717:2: warning: cast to restricted __be32

[Thanks to Tomoyuki Okazaki for spotting the typo]
Tested-by: Carlo E. Prelz <fluido@fluido.as>
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25 11:01:15 +11:00
Neil Horman d12d6b6d37 crypto: testmgr - Trigger a panic when self test fails in FIPS mode
The FIPS specification requires that should self test for any supported
crypto algorithm fail during operation in fips mode, we need to prevent
the use of any crypto functionality until such time as the system can
be re-initialized.  Seems like the best way to handle that would be
to panic the system if we were in fips mode and failed a self test.
This patch implements that functionality.  I've built and run it
successfully.

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25 11:01:14 +11:00
Linus Torvalds 59da1f87b2 Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx
* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx:
  async_xor: dma_map destination DMA_BIDIRECTIONAL
  dmaengine: protect 'id' from concurrent registrations
  ioat: wait for self-test completion
2008-12-18 12:05:53 -08:00
Herbert Xu 6a0fcbb4da crypto: api - Disallow cryptomgr as a module if algorithms are built-in
If we have at least one algorithm built-in then it no longer makes
sense to have the testing framework, and hence cryptomgr to be a
module.  It should be either on or off, i.e., built-in or disabled.

This just happens to stop a potential runaway modprobe loop that
seems to trigger on at least one distro.

With fixes from Evgeniy Polyakov.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-10 23:29:44 +11:00
Dan Williams a06d568f7c async_xor: dma_map destination DMA_BIDIRECTIONAL
Mapping the destination multiple times is a misuse of the dma-api.
Since the destination may be reused as a source, ensure that it is only
mapped once and that it is mapped bidirectionally.  This appears to add
ugliness on the unmap side in that it always reads back the destination
address from the descriptor, but gcc can determine that dma_unmap is a
nop and not emit the code that calculates its arguments.

Cc: <stable@kernel.org>
Cc: Saeed Bishara <saeed@marvell.com>
Acked-by: Yuri Tikhonov <yur@emcraft.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2008-12-08 13:46:00 -07:00
Linus Torvalds b91385236c Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx:
  fsldma: allow Freescale Elo DMA driver to be compiled as a module
  fsldma: remove internal self-test from Freescale Elo DMA driver
  drivers/dma/dmatest.c: switch a GFP_ATOMIC to GFP_KERNEL
  dmatest: properly handle duplicate DMA channels
  drivers/dma/ioat_dma.c: drop code after return
  async_tx: make async_tx_run_dependencies() easier to read
2008-10-20 12:54:30 -07:00
Linus Torvalds f6bccf6954 Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  crypto: skcipher - Use RNG interface instead of get_random_bytes
  crypto: rng - RNG interface and implementation
  crypto: api - Add fips_enable flag
  crypto: skcipher - Move IV generators into their own modules
  crypto: cryptomgr - Test ciphers using ECB
  crypto: api - Use test infrastructure
  crypto: cryptomgr - Add test infrastructure
  crypto: tcrypt - Add alg_test interface
  crypto: tcrypt - Abort and only log if there is an error
  crypto: crc32c - Use Intel CRC32 instruction
  crypto: tcrypt - Avoid using contiguous pages
  crypto: api - Display larval objects properly
  crypto: api - Export crypto_alg_lookup instead of __crypto_alg_lookup
  crypto: Kconfig - Replace leading spaces with tabs
2008-10-10 11:20:42 -07:00
Dan Williams fdb0ac8061 async_tx: make async_tx_run_dependencies() easier to read
* Rename 'next' to 'dep'
* Move the channel switch check inside the loop to simplify
  termination

Acked-by: Ilya Yanok <yanok@emcraft.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2008-09-13 19:57:04 -07:00
Herbert Xu f4c4cd6d14 Revert "crypto: camellia - Use kernel-provided bitops, unaligned access helpers"
This reverts commit bd699f2df6,
which causes camellia to fail the included self-test vectors.
It has also been confirmed that it breaks existing encrypted
disks using camellia.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-09-08 14:29:54 +10:00
Yuri Tikhonov de24125dd0 async_tx: fix the bug in async_tx_run_dependencies
Should clear the next pointer of the TX if we are sure that the
next TX (say NXT) will be submitted to the channel too. Overwise,
we break the chain of descriptors, because we lose the information
about the next descriptor to run. So next time, when invoke
async_tx_run_dependencies() with TX, it's TX->next will be NULL, and
NXT will be never submitted.

Cc: <stable@kernel.org>		[2.6.26]
Signed-off-by: Yuri Tikhonov <yur@emcraft.com>
Signed-off-by: Ilya Yanok <yanok@emcraft.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2008-09-05 08:15:47 -07:00
Herbert Xu a0f000ec9b crypto: skcipher - Use RNG interface instead of get_random_bytes
This patch makes the IV generators use the new RNG interface so
that the user can pick an RNG other than the default get_random_bytes.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-08-29 15:50:06 +10:00
Neil Horman 17f0f4a47d crypto: rng - RNG interface and implementation
This patch adds a random number generator interface as well as a
cryptographic pseudo-random number generator based on AES.  It is
meant to be used in cases where a deterministic CPRNG is required.

One of the first applications will be as an input in the IPsec IV
generation process.

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-08-29 15:50:04 +10:00
Neil Horman ccb778e184 crypto: api - Add fips_enable flag
Add the ability to turn FIPS-compliant mode on or off at boot

In order to be FIPS compliant, several check may need to be preformed that may
be construed as unusefull in a non-compliant mode.  This patch allows us to set
a kernel flag incating that we are running in a fips-compliant mode from boot
up.  It also exports that mode information to user space via a sysctl
(/proc/sys/crypto/fips_enabled).

Tested successfully by me.

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-08-29 15:50:02 +10:00
Herbert Xu 5be5e667a9 crypto: skcipher - Move IV generators into their own modules
This patch moves the default IV generators into their own modules
in order to break a dependency loop between cryptomgr, rng, and
blkcipher.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-08-29 15:50:00 +10:00
Herbert Xu 1aa4ecd95d crypto: cryptomgr - Test ciphers using ECB
As it is we only test ciphers when combined with a mode.  That means
users that do not invoke a mode of operations may get an untested
cipher.

This patch tests all ciphers using the ECB mode so that simple cipher
users such as ansi-cprng are also protected.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-08-29 15:49:58 +10:00
Herbert Xu 73d3864a48 crypto: api - Use test infrastructure
This patch makes use of the new testing infrastructure by requiring
algorithms to pass a run-time test before they're made available to
users.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-08-29 15:49:57 +10:00
Herbert Xu da7f033ddc crypto: cryptomgr - Add test infrastructure
This patch moves the newly created alg_test infrastructure into
cryptomgr.  This shall allow us to use it for testing at algorithm
registrations.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-08-29 15:49:55 +10:00
Herbert Xu 01b323245e crypto: tcrypt - Add alg_test interface
This patch creates a new interface algorithm testing.  A test can
be requested for a particular implementation of an algorithm.  This
is achieved by taking both the name of the algorithm and that of
the implementation.

The all-inclusive test has also been rewritten to no longer require
a duplicate listing of all algorithms with tests.  In that process
a number of missing tests have also been discovered and rectified.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-08-29 15:49:53 +10:00
Herbert Xu bdecd22821 crypto: tcrypt - Abort and only log if there is an error
The info printed is a complete waste of space when there is no error
since it doesn't tell us anything that we don't already know.  If there
is an error, we can also be more verbose.

In case that there is an error, this patch also aborts the test and
returns the error to the caller.  In future this will be used to
algorithms at registration time.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-08-29 15:49:52 +10:00
Austin Zhang 8cb51ba8e0 crypto: crc32c - Use Intel CRC32 instruction
From NHM processor onward, Intel processors can support hardware accelerated
CRC32c algorithm with the new CRC32 instruction in SSE 4.2 instruction set.
The patch detects the availability of the feature, and chooses the most proper
way to calculate CRC32c checksum.
Byte code instructions are used for compiler compatibility.
No MMX / XMM registers is involved in the implementation.

Signed-off-by: Austin Zhang <austin.zhang@intel.com>
Signed-off-by: Kent Liu <kent.liu@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-08-29 15:49:50 +10:00
Herbert Xu f139cfa7cd crypto: tcrypt - Avoid using contiguous pages
If tcrypt is to be used as a run-time integrity test, it needs to be
more resilient in a hostile environment.  For a start allocating 32K
of physically contiguous memory is definitely out.

This patch teaches it to use separate pages instead.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-08-29 15:48:57 +10:00
Herbert Xu a7581a01fb crypto: api - Display larval objects properly
Rather than displaying larval objects as real objects, this patch
makes them show up under /proc/crypto as of type larval.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-08-29 15:48:56 +10:00
Herbert Xu c51b6c8102 crypto: api - Export crypto_alg_lookup instead of __crypto_alg_lookup
Since the only user of __crypto_alg_lookup is doing exactly what
crypto_alg_lookup does, we can now the latter in lieu of the former.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-08-29 15:48:55 +10:00
Adrian Bunk b6d4434186 crypto: Kconfig - Replace leading spaces with tabs
Instead of tabs there were two spaces.

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-08-29 15:48:53 +10:00
Herbert Xu a697690bec crypto: authenc - Avoid using clobbered request pointer
Authenc works in two stages for encryption, it first encrypts and
then computes an ICV.  The context memory of the request is used
by both operations.  The problem is that when an asynchronous
encryption completes, we will compute the ICV and then reread the
context memory of the encryption to get the original request.

It just happens that we have a buffer of 16 bytes in front of the
request pointer, so ICVs of 16 bytes (such as SHA1) do not trigger
the bug.  However, any attempt to uses a larger ICV instantly kills
the machine when the first asynchronous encryption is completed.

This patch fixes this by saving the request pointer before we start
the ICV computation.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-08-23 01:04:06 +10:00
Herbert Xu dbaaba1d0a crypto: hash - Fix digest size check for digest type
The changeset ca786dc738

	crypto: hash - Fixed digest size check

missed one spot for the digest type.  This patch corrects that
error.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-08-13 20:08:38 +10:00
Herbert Xu f176e632ef crypto: tcrypt - Fix AEAD chunk testing
My changeset 4b22f0ddb6

	crypto: tcrpyt - Remove unnecessary kmap/kunmap calls

introduced a typo that broke AEAD chunk testing.  In particular,
axbuf should really be xbuf.

There is also an issue with testing the last segment when encrypting.
The additional part produced by AEAD wasn't tested.  Similarly, on
decryption the additional part of the AEAD input is mistaken for
corruption.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-08-13 20:08:36 +10:00
Dan Williams e34a8ae790 async_tx: fix missing braces in async_xor_zero_sum
Found-by: Yuri Tikhonov <yur@emcraft.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2008-08-05 10:25:20 -07:00
Linus Torvalds 5554b35933 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx: (24 commits)
  I/OAT: I/OAT version 3.0 support
  I/OAT: tcp_dma_copybreak default value dependent on I/OAT version
  I/OAT: Add watchdog/reset functionality to ioatdma
  iop_adma: cleanup iop_chan_xor_slot_count
  iop_adma: document how to calculate the minimum descriptor pool size
  iop_adma: directly reclaim descriptors on allocation failure
  async_tx: make async_tx_test_ack a boolean routine
  async_tx: remove depend_tx from async_tx_sync_epilog
  async_tx: export async_tx_quiesce
  async_tx: fix handling of the "out of descriptor" condition in async_xor
  async_tx: ensure the xor destination buffer remains dma-mapped
  async_tx: list_for_each_entry_rcu() cleanup
  dmaengine: Driver for the Synopsys DesignWare DMA controller
  dmaengine: Add slave DMA interface
  dmaengine: add DMA_COMPL_SKIP_{SRC,DEST}_UNMAP flags to control dma unmap
  dmaengine: Add dma_client parameter to device_alloc_chan_resources
  dmatest: Simple DMA memcpy test client
  dmaengine: DMA engine driver for Marvell XOR engine
  iop-adma: fix platform driver hotplug/coldplug
  dmaengine: track the number of clients using a channel
  ...

Fixed up conflict in drivers/dca/dca-sysfs.c manually
2008-07-23 12:03:18 -07:00
Dan Williams 3dce017137 async_tx: remove depend_tx from async_tx_sync_epilog
All callers of async_tx_sync_epilog have called async_tx_quiesce on the
depend_tx, so async_tx_sync_epilog need only call the callback to
complete the operation.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2008-07-17 17:59:55 -07:00
Dan Williams d2c52b7983 async_tx: export async_tx_quiesce
Replace open coded "wait and acknowledge" instances with async_tx_quiesce.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2008-07-17 17:59:55 -07:00
Dan Williams 669ab0b210 async_tx: fix handling of the "out of descriptor" condition in async_xor
Ensure forward progress is made when a dmaengine driver is unable to
allocate an xor descriptor by breaking the dependency chain with
async_tx_quisce() and issue any pending descriptors.

Tested with iop-adma by setting device->max_xor = 2 to force multiple
calls to device_prep_dma_xor for each call to async_xor and limiting the
descriptor slot pool to 5.  Discovered that the minimum descriptor pool
size for iop-adma is 2 * iop_chan_xor_slot_cnt(device->max_xor) + 1.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2008-07-17 17:59:55 -07:00
Dan Williams 1e55db2d6b async_tx: ensure the xor destination buffer remains dma-mapped
When the number of source buffers for an xor operation exceeds the hardware
channel maximum async_xor creates a chain of dependent operations.  The result
of one operation is reused as an input to the next to continue the xor
calculation.  The destination buffer should remain mapped for the duration of
the entire chain.  To provide this guarantee the code must no longer be allowed
to fallback to the synchronous path as this will preclude the buffer from being
unmapped, i.e. the dma-driver will potentially miss the descriptor with
!DMA_COMPL_SKIP_DEST_UNMAP.

Cc: Neil Brown <neilb@suse.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2008-07-17 17:59:55 -07:00
Li Zefan 20fc190b0e async_tx: list_for_each_entry_rcu() cleanup
In the rcu update side, don't use list_for_each_entry_rcu().

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2008-07-17 17:59:47 -07:00
Linus Torvalds 260eddf439 Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  Revert crypto: prng - Deterministic CPRNG
2008-07-15 18:57:38 -07:00
Ingo Molnar 6c9fcaf2ee Merge branch 'core/rcu' into core/rcu-for-linus 2008-07-15 21:10:12 +02:00
Herbert Xu 7890ea1f95 Revert crypto: prng - Deterministic CPRNG
This patch is clearly not ready yet for prime time.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-07-15 23:46:24 +08:00
Ingo Molnar 0c81b2a144 Merge branch 'linus' into core/rcu
Conflicts:

	include/linux/rculist.h
	kernel/rcupreempt.c

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-11 10:46:50 +02:00
Herbert Xu 18e33e6d5c crypto: hash - Move ahash functions into crypto/hash.h
All new crypto interfaces should go into individual files as much
as possible in order to ensure that crypto.h does not collapse under
its own weight.

This patch moves the ahash code into crypto/hash.h and crypto/internal/hash.h
respectively.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-07-10 20:35:18 +08:00
Herbert Xu 5773a3e6e3 crypto: crc32c - Add ahash implementation
This patch reimplements crc32c using the ahash interface.  This
allows one tfm to be used by an unlimited number of users provided
that they all use the same key (which all current crc32c users do).

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-07-10 20:35:18 +08:00
Herbert Xu 20036252fc crypto: hash - Added scatter list walking helper
This patch adds the walking helpers for hash algorithms akin to
those of block ciphers.  This is a necessary step before we can
reimplement existing hash algorithms using the new ahash interface.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-07-10 20:35:18 +08:00
Neil Horman b8454eebe3 crypto: prng - Deterministic CPRNG
This patch adds a cryptographic pseudo-random number generator
based on CTR(AES-128).  It is meant to be used in cases where a
deterministic CPRNG is required.

One of the first applications will be as an input in the IPsec IV
generation process.

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-07-10 20:35:18 +08:00
Herbert Xu 166247f46a crypto: hash - Removed vestigial ahash fields
The base field in ahash_tfm appears to have been cut-n-pasted from
ablkcipher.  It isn't needed here at all.  Similarly, the info field
in ahash_request also appears to have originated from its cipher
counter-part and is vestigial.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-07-10 20:35:18 +08:00
Herbert Xu ca786dc738 crypto: hash - Fixed digest size check
The digest size check on hash algorithms is incorrect.  It's
perfectly valid for hash algorithms to have a digest length
longer than their block size.  For example crc32c has a block
size of 1 and a digest size of 4.  Rather than having it lie
about its block size, this patch fixes the checks to do what
they really should which is to bound the digest size so that
code placing the digest on the stack continue to work.

HMAC however still needs to check this as it's only defined
for such algorithms.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-07-10 20:35:17 +08:00
Harvey Harrison caee16883a crypto: rmd - sparse annotations
Similar to the rmd128.c annotations, significantly cuts down on the
noise.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-07-10 20:35:17 +08:00