This patch adds support for IPsec ESN (Extended Sequence Numbers) in
encrypt and authenticate mode (eg. AES-CBC and SHA256) and combined mode
(eg. AES-GCM).
For encrypt and authenticate mode the ESN is stored in separate crp_esn
buffer because the high-order 32 bits of the sequence number are
appended after the Next Header (RFC 4303).
For combined modes the high-order 32 bits of the sequence number [e.g.
RFC 4106, Chapter 5 AAD Construction] are part of crp_aad (prepared by
netipsec layer in case of ESN support enabled), therefore non visible
diff around combined modes.
Submitted by: Grzegorz Jaszczyk <jaz@semihalf.com>
Patryk Duda <pdk@semihalf.com>
Reviewed by: jhb
Differential revision: https://reviews.freebsd.org/D22364
Obtained from: Semihalf
Sponsored by: Stormshield
- Just use sw->octx != NULL to handle the HMAC case when finalizing
the MAC.
- Explicitly zero the on-stack auth context.
Reviewed by: markj
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D26688
crypto(9) functions can now be used on buffers composed of an array of
vm_page_t structures, such as those stored in an unmapped struct bio. It
requires the running to kernel to support the direct memory map, so not all
architectures can use it.
Reviewed by: markj, kib, jhb, mjg, mat, bcr (manpages)
MFC after: 1 week
Sponsored by: Axcient
Differential Revision: https://reviews.freebsd.org/D25671
In addition to reducing lines of code, this also ensures that the full
allocation is always zeroed avoiding possible bugs with incorrect
lengths passed to explicit_bzero().
Suggested by: cem
Reviewed by: cem, delphij
Approved by: csprng (cem)
Sponsored by: Chelsio Communications
Differential Revision: https://reviews.freebsd.org/D25435
This permits requests to provide the AAD in a separate side buffer
instead of as a region in the crypto request input buffer. This is
useful when the main data buffer might not contain the full AAD
(e.g. for TLS or IPsec with ESN).
Unlike separate IVs which are constrained in size and stored in an
array in struct cryptop, separate AAD is provided by the caller
setting a new crp_aad pointer to the buffer. The caller must ensure
the pointer remains valid and the buffer contents static until the
request is completed (e.g. when the callback routine is invoked).
As with separate output buffers, not all drivers support this feature.
Consumers must request use of this feature via a new session flag.
To aid in driver testing, kern.crypto.cryptodev_separate_aad can be
set to force /dev/crypto requests to use a separate AAD buffer.
Discussed with: cem
Sponsored by: Chelsio Communications
Differential Revision: https://reviews.freebsd.org/D25288
- Make use of cursors to avoid data copies for AES-CCM and AES-GCM.
Pass pointers into the request's input and/or output buffers
directly to the Update, encrypt, and decrypt hooks rather than
always copying all data into a temporary block buffer on the stack.
- Move handling for partial final blocks out of the main loop.
This removes branches from the main loop and permits using
encrypt/decrypt_last which avoids a memset to clear the rest of the
block on the stack.
- Shrink the on-stack buffers to assume AES block sizes and CCM/GCM
tag lengths.
- For AAD data, pass larger chunks to axf->Update. CCM can take each
AAD segment in a single call. GMAC can take multiple blocks at a
time.
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D25058
- crypto_apply() is only used for reading a buffer to compute a
digest, so change the data pointer to a const pointer.
- To better match m_apply(), change the data pointer type to void *
and the length from uint16_t to u_int. The length field in
particular matters as none of the apply logic was splitting requests
larger than UINT16_MAX.
- Adjust the auth_xform Update callback to match the function
prototype passed to crypto_apply() and crypto_apply_buf(). This
removes the needs for casts when using the Update callback.
- Change the Reinit and Setkey callbacks to also use a u_int length
instead of uint16_t.
- Update auth transforms for the changes. While here, use C99
initializers for auth_hash structures and avoid casts on callbacks.
Reviewed by: cem
Sponsored by: Chelsio Communications
Differential Revision: https://reviews.freebsd.org/D25171
Some crypto consumers such as GELI and KTLS for file-backed sendfile
need to store their output in a separate buffer from the input.
Currently these consumers copy the contents of the input buffer into
the output buffer and queue an in-place crypto operation on the output
buffer. Using a separate output buffer avoids this copy.
- Create a new 'struct crypto_buffer' describing a crypto buffer
containing a type and type-specific fields. crp_ilen is gone,
instead buffers that use a flat kernel buffer have a cb_buf_len
field for their length. The length of other buffer types is
inferred from the backing store (e.g. uio_resid for a uio).
Requests now have two such structures: crp_buf for the input buffer,
and crp_obuf for the output buffer.
- Consumers now use helper functions (crypto_use_*,
e.g. crypto_use_mbuf()) to configure the input buffer. If an output
buffer is not configured, the request still modifies the input
buffer in-place. A consumer uses a second set of helper functions
(crypto_use_output_*) to configure an output buffer.
- Consumers must request support for separate output buffers when
creating a crypto session via the CSP_F_SEPARATE_OUTPUT flag and are
only permitted to queue a request with a separate output buffer on
sessions with this flag set. Existing drivers already reject
sessions with unknown flags, so this permits drivers to be modified
to support this extension without requiring all drivers to change.
- Several data-related functions now have matching versions that
operate on an explicit buffer (e.g. crypto_apply_buf,
crypto_contiguous_subsegment_buf, bus_dma_load_crp_buf).
- Most of the existing data-related functions operate on the input
buffer. However crypto_copyback always writes to the output buffer
if a request uses a separate output buffer.
- For the regions in input/output buffers, the following conventions
are followed:
- AAD and IV are always present in input only and their
fields are offsets into the input buffer.
- payload is always present in both buffers. If a request uses a
separate output buffer, it must set a new crp_payload_start_output
field to the offset of the payload in the output buffer.
- digest is in the input buffer for verify operations, and in the
output buffer for compute operations. crp_digest_start is relative
to the appropriate buffer.
- Add a crypto buffer cursor abstraction. This is a more general form
of some bits in the cryptosoft driver that tried to always use uio's.
However, compared to the original code, this avoids rewalking the uio
iovec array for requests with multiple vectors. It also avoids
allocate an iovec array for mbufs and populating it by instead walking
the mbuf chain directly.
- Update the cryptosoft(4) driver to support separate output buffers
making use of the cursor abstraction.
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D24545
Add a 'native_blocksize' member to 'struct enc_xform' that ciphers can
use if they support a partial final block. This is particular useful
for stream ciphers, but can also apply to other ciphers. cryptosoft
will only pass in native blocks to the encrypt and decrypt hooks. For
the final partial block, 'struct enc_xform' now has new
encrypt_last/decrypt_last hooks which accept the length of the final
block. The multi_block methods are also retired.
Mark AES-ICM (AES-CTR) as a stream cipher. This has some interesting
effects on IPsec in that FreeBSD can now properly receive all packets
sent by Linux when using AES-CTR, but FreeBSD can no longer
interoperate with OpenBSD and older verisons of FreeBSD which assume
AES-CTR packets have a payload padded to a 16-byte boundary. Kornel
has offered to work on a patch to add a compatiblity sysctl to enforce
additional padding for AES-CTR in esp_output to permit compatibility
with OpenBSD and older versions of FreeBSD.
AES-XTS continues to use a block size of a single AES block length.
It is possible to adjust it to support partial final blocks by
implementing cipher text stealing via encrypt_last/decrypt_last hooks,
but I have not done so.
Reviewed by: cem (earlier version)
Tested by: Kornel Dulęba <mindal@semihalf.com> (AES-CTR with IPsec)
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D24906
- Consistently use 'void *' for key schedules / key contexts instead
of a mix of 'caddr_t', 'uint8_t *', and 'void *'.
- Add a ctxsize member to enc_xform similar to what auth transforms use
and require callers to malloc/zfree the context. The setkey callback
now supplies the caller-allocated context pointer and the zerokey
callback is removed. Callers now always use zfree() to ensure
key contexts are zeroed.
- Consistently use C99 initializers for all statically-initialized
instances of 'struct enc_xform'.
- Change the encrypt and decrypt functions to accept separate in and
out buffer pointers. Almost all of the backend crypto functions
already supported separate input and output buffers and this makes
it simpler to support separate buffers in OCF.
- Remove xform_userland.h shim to permit transforms to be compiled in
userland. Transforms no longer call malloc/free directly.
Reviewed by: cem (earlier version)
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D24855
There are no in-kernel consumers.
Reviewed by: cem
Relnotes: yes
Sponsored by: Chelsio Communications
Differential Revision: https://reviews.freebsd.org/D24775
It no longer has any in-kernel consumers.
Reviewed by: cem
Relnotes: yes
Sponsored by: Chelsio Communications
Differential Revision: https://reviews.freebsd.org/D24772
They no longer have any in-tree consumers. Note that these are a
different from MD5-HMAC and SHA1-HMAC and were only used with IPsec.
Reviewed by: cem
Relnotes: yes
Sponsored by: Chelsio Communications
Differential Revision: https://reviews.freebsd.org/D24770
This was removed from IPsec in r286100 and no longer has any in-tree
consumers.
Reviewed by: cem
Relnotes: yes
Sponsored by: Chelsio Communications
Differential Revision: https://reviews.freebsd.org/D24769
It no longer has any in-tree consumers.
Reviewed by: cem
Relnotes: yes
Sponsored by: Chelsio Communications
Differential Revision: https://reviews.freebsd.org/D24768
Although a few drivers supported this algorithm, there were never any
in-kernel consumers. cryptosoft and cryptodev never supported it,
and there was not a software xform auth_hash for it.
Reviewed by: cem
Relnotes: yes
Sponsored by: Chelsio Communications
Differential Revision: https://reviews.freebsd.org/D24767
The sole in-tree user of this flag has been retired, so remove this
complexity from all drivers. While here, add a helper routine drivers
can use to read the current request's IV into a local buffer. Use
this routine to replace duplicated code in nearly all drivers.
Reviewed by: cem
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D24450
- The linked list of cryptoini structures used in session
initialization is replaced with a new flat structure: struct
crypto_session_params. This session includes a new mode to define
how the other fields should be interpreted. Available modes
include:
- COMPRESS (for compression/decompression)
- CIPHER (for simply encryption/decryption)
- DIGEST (computing and verifying digests)
- AEAD (combined auth and encryption such as AES-GCM and AES-CCM)
- ETA (combined auth and encryption using encrypt-then-authenticate)
Additional modes could be added in the future (e.g. if we wanted to
support TLS MtE for AES-CBC in the kernel we could add a new mode
for that. TLS modes might also affect how AAD is interpreted, etc.)
The flat structure also includes the key lengths and algorithms as
before. However, code doesn't have to walk the linked list and
switch on the algorithm to determine which key is the auth key vs
encryption key. The 'csp_auth_*' fields are always used for auth
keys and settings and 'csp_cipher_*' for cipher. (Compression
algorithms are stored in csp_cipher_alg.)
- Drivers no longer register a list of supported algorithms. This
doesn't quite work when you factor in modes (e.g. a driver might
support both AES-CBC and SHA2-256-HMAC separately but not combined
for ETA). Instead, a new 'crypto_probesession' method has been
added to the kobj interface for symmteric crypto drivers. This
method returns a negative value on success (similar to how
device_probe works) and the crypto framework uses this value to pick
the "best" driver. There are three constants for hardware
(e.g. ccr), accelerated software (e.g. aesni), and plain software
(cryptosoft) that give preference in that order. One effect of this
is that if you request only hardware when creating a new session,
you will no longer get a session using accelerated software.
Another effect is that the default setting to disallow software
crypto via /dev/crypto now disables accelerated software.
Once a driver is chosen, 'crypto_newsession' is invoked as before.
- Crypto operations are now solely described by the flat 'cryptop'
structure. The linked list of descriptors has been removed.
A separate enum has been added to describe the type of data buffer
in use instead of using CRYPTO_F_* flags to make it easier to add
more types in the future if needed (e.g. wired userspace buffers for
zero-copy). It will also make it easier to re-introduce separate
input and output buffers (in-kernel TLS would benefit from this).
Try to make the flags related to IV handling less insane:
- CRYPTO_F_IV_SEPARATE means that the IV is stored in the 'crp_iv'
member of the operation structure. If this flag is not set, the
IV is stored in the data buffer at the 'crp_iv_start' offset.
- CRYPTO_F_IV_GENERATE means that a random IV should be generated
and stored into the data buffer. This cannot be used with
CRYPTO_F_IV_SEPARATE.
If a consumer wants to deal with explicit vs implicit IVs, etc. it
can always generate the IV however it needs and store partial IVs in
the buffer and the full IV/nonce in crp_iv and set
CRYPTO_F_IV_SEPARATE.
The layout of the buffer is now described via fields in cryptop.
crp_aad_start and crp_aad_length define the boundaries of any AAD.
Previously with GCM and CCM you defined an auth crd with this range,
but for ETA your auth crd had to span both the AAD and plaintext
(and they had to be adjacent).
crp_payload_start and crp_payload_length define the boundaries of
the plaintext/ciphertext. Modes that only do a single operation
(COMPRESS, CIPHER, DIGEST) should only use this region and leave the
AAD region empty.
If a digest is present (or should be generated), it's starting
location is marked by crp_digest_start.
Instead of using the CRD_F_ENCRYPT flag to determine the direction
of the operation, cryptop now includes an 'op' field defining the
operation to perform. For digests I've added a new VERIFY digest
mode which assumes a digest is present in the input and fails the
request with EBADMSG if it doesn't match the internally-computed
digest. GCM and CCM already assumed this, and the new AEAD mode
requires this for decryption. The new ETA mode now also requires
this for decryption, so IPsec and GELI no longer do their own
authentication verification. Simple DIGEST operations can also do
this, though there are no in-tree consumers.
To eventually support some refcounting to close races, the session
cookie is now passed to crypto_getop() and clients should no longer
set crp_sesssion directly.
- Assymteric crypto operation structures should be allocated via
crypto_getkreq() and freed via crypto_freekreq(). This permits the
crypto layer to track open asym requests and close races with a
driver trying to unregister while asym requests are in flight.
- crypto_copyback, crypto_copydata, crypto_apply, and
crypto_contiguous_subsegment now accept the 'crp' object as the
first parameter instead of individual members. This makes it easier
to deal with different buffer types in the future as well as
separate input and output buffers. It's also simpler for driver
writers to use.
- bus_dmamap_load_crp() loads a DMA mapping for a crypto buffer.
This understands the various types of buffers so that drivers that
use DMA do not have to be aware of different buffer types.
- Helper routines now exist to build an auth context for HMAC IPAD
and OPAD. This reduces some duplicated work among drivers.
- Key buffers are now treated as const throughout the framework and in
device drivers. However, session key buffers provided when a session
is created are expected to remain alive for the duration of the
session.
- GCM and CCM sessions now only specify a cipher algorithm and a cipher
key. The redundant auth information is not needed or used.
- For cryptosoft, split up the code a bit such that the 'process'
callback now invokes a function pointer in the session. This
function pointer is set based on the mode (in effect) though it
simplifies a few edge cases that would otherwise be in the switch in
'process'.
It does split up GCM vs CCM which I think is more readable even if there
is some duplication.
- I changed /dev/crypto to support GMAC requests using CRYPTO_AES_NIST_GMAC
as an auth algorithm and updated cryptocheck to work with it.
- Combined cipher and auth sessions via /dev/crypto now always use ETA
mode. The COP_F_CIPHER_FIRST flag is now a no-op that is ignored.
This was actually documented as being true in crypto(4) before, but
the code had not implemented this before I added the CIPHER_FIRST
flag.
- I have not yet updated /dev/crypto to be aware of explicit modes for
sessions. I will probably do that at some point in the future as well
as teach it about IV/nonce and tag lengths for AEAD so we can support
all of the NIST KAT tests for GCM and CCM.
- I've split up the exising crypto.9 manpage into several pages
of which many are written from scratch.
- I have converted all drivers and consumers in the tree and verified
that they compile, but I have not tested all of them. I have tested
the following drivers:
- cryptosoft
- aesni (AES only)
- blake2
- ccr
and the following consumers:
- cryptodev
- IPsec
- ktls_ocf
- GELI (lightly)
I have not tested the following:
- ccp
- aesni with sha
- hifn
- kgssapi_krb5
- ubsec
- padlock
- safe
- armv8_crypto (aarch64)
- glxsb (i386)
- sec (ppc)
- cesa (armv7)
- cryptocteon (mips64)
- nlmsec (mips64)
Discussed with: cem
Relnotes: yes
Sponsored by: Chelsio Communications
Differential Revision: https://reviews.freebsd.org/D23677
This commit essentially has three parts:
* Add the AES-CCM encryption hooks. This is in and of itself fairly small,
as there is only a small difference between CCM and the other ICM-based
algorithms.
* Hook the code into the OpenCrypto framework. This is the bulk of the
changes, as the algorithm type has to be checked for, and the differences
between it and GCM dealt with.
* Update the cryptocheck tool to be aware of it. This is invaluable for
confirming that the code works.
This is a software-only implementation, meaning that the performance is very
low.
Sponsored by: iXsystems Inc.
Differential Revision: https://reviews.freebsd.org/D19090
As part of ZFS Crypto, I started getting a series of panics when I did not
have AESNI loaded. Adding locking fixed it, and I concluded that the
Reinit function altered the AES key schedule. This locking is not as
fine-grained as it could be (AESNI uses per-cpu locking), but
it's minimally invasive.
Sponsored by: iXsystems Inc
Reviewed by: cem, mav
Approved by: re (gjb), mav (mentor)
Differential Revision: https://reviews.freebsd.org/D17307
Fix a regression introduced in r336439.
Rather than allowing any linked list of algorithms, allow at most two
(typically, some combination of encrypt and/or MAC). Removes a WAITOK
malloc in an unsleepable context (classic LOR) by placing both software
algorithm contexts within the OCF-managed session object.
Tested with 'cryptocheck -a all -d cryptosoft0', which includes some
encrypt-and-MAC modes.
PR: 230304
Reported by: sef@
Track session objects in the framework, and pass handles between the
framework (OCF), consumers, and drivers. Avoid redundancy and complexity in
individual drivers by allocating session memory in the framework and
providing it to drivers in ::newsession().
Session handles are no longer integers with information encoded in various
high bits. Use of the CRYPTO_SESID2FOO() macros should be replaced with the
appropriate crypto_ses2foo() function on the opaque session handle.
Convert OCF drivers (in particular, cryptosoft, as well as myriad others) to
the opaque handle interface. Discard existing session tracking as much as
possible (quick pass). There may be additional code ripe for deletion.
Convert OCF consumers (ipsec, geom_eli, krb5, cryptodev) to handle-style
interface. The conversion is largely mechnical.
The change is documented in crypto.9.
Inspired by
https://lists.freebsd.org/pipermail/freebsd-arch/2018-January/018835.html .
No objection from: ae (ipsec portion)
Reported by: jhb
In part, to support OpenSSL's use of cryptodev, which puts the HMAC pieces
in software and only offloads the raw hash primitive.
The following cryptodev identifiers are added:
* CRYPTO_RIPEMD160 (not hooked up)
* CRYPTO_SHA2_224
* CRYPTO_SHA2_256
* CRYPTO_SHA2_384
* CRYPTO_SHA2_512
The plain SHA1 and 2 hashes are plumbed through cryptodev (feels like there
is a lot of redundancy here...) and cryptosoft.
This adds new auth_hash implementations for the plain hashes, as well as
SHA1 (which had a cryptodev.h identifier, but no implementation).
Add plain SHA 1 and 2 hash tests to the cryptocheck tool.
Motivation stems from John Baldwin's earlier OCF email,
https://lists.freebsd.org/pipermail/freebsd-arch/2018-January/018835.html .
When a caller passes in a uio or mbuf chain that is longer than crd_len, in
tandem with a transform that supports the multi-block interface,
swcr_encdec() would process the entire mbuf or uio instead of just the
portion indicated by crd_len (+ crd_skip).
De/encryption are performed in-place, so this would trash subsequent uio or
mbuf contents.
This was introduced in r331639 (mea culpa). It only affects the
{de,en}crypt_multi() family of interfaces. That interface only has one
consumer transform in-tree (for now): Chacha20.
PR: 227605
Submitted by: Valentin Vergez <valentin.vergez AT stormshield.eu>
Introduced in r331639 by removing an instance of undefined behavior.
While we're here, the variable scope can be entirely moved inside the loop.
Reported by: Coverity
CID: 1387985
Sponsored by: Dell EMC Isilon
Mostly this is a thin shim around existing code to integrate with enc_xform
and cryptosoft (+ cryptodev).
Expand the cryptodev buffer used to match that of Chacha20's native block
size as a performance enhancement for chacha20_xform_crypt_multi.
xforms that support processing of multiple blocks at a time (to support more
efficient modes, for example) can define the encrypt_ and decrypt_multi
interfaces. If these interfaces are not present, the generic cryptosoft
code falls back on the block-at-a-time encrypt/decrypt interfaces.
Stream ciphers may support arbitrarily sized inputs (equivalent to an input
block size of 1 byte) but may be more efficient if a larger block is passed.
Sponsored by: Dell EMC Isilon
The upstream repository is on github BLAKE2/libb2. Files landed in
sys/contrib/libb2 are the unmodified upstream files, except for one
difference: secure_zero_memory's contents have been replaced with
explicit_bzero() only because the previous implementation broke powerpc
link. Preferential use of explicit_bzero() is in progress upstream, so
it is anticipated we will be able to drop this diff in the future.
sys/crypto/blake2 contains the source files needed to port libb2 to our
build system, a wrapped (limited) variant of the algorithm to match the API
of our auth_transform softcrypto abstraction, incorporation into the Open
Crypto Framework (OCF) cryptosoft(4) driver, as well as an x86 SSE/AVX
accelerated OCF driver, blake2(4).
Optimized variants of blake2 are compiled for a number of x86 machines
(anything from SSE2 to AVX + XOP). On those machines, FPU context will need
to be explicitly saved before using blake2(4)-provided algorithms directly.
Use via cryptodev / OCF saves FPU state automatically, and use via the
auth_transform softcrypto abstraction does not use FPU.
The intent of the OCF driver is mostly to enable testing in userspace via
/dev/crypto. ATF tests are added with published KAT test vectors to
validate correctness.
Reviewed by: jhb, markj
Obtained from: github BLAKE2/libb2
Differential Revision: https://reviews.freebsd.org/D14662
An OCF-naive user program could use these primitives to implement HMAC, for
example. This would make the freed context sensitive data.
Probably other bzeros in this file should be explicit_bzeros as well.
Future work.
Reviewed by: jhb, markj
Differential Revision: https://reviews.freebsd.org/D14662 (minor part of a larger work)
This reduces noise when kernel is compiled by newer GCC versions,
such as one used by external toolchain ports.
Reviewed by: kib, andrew(sys/arm and sys/arm64), emaste(partial), erj(partial)
Reviewed by: jhb (sys/dev/pci/* sys/kern/vfs_aio.c and sys/kern/kern_synch.c)
Differential Revision: https://reviews.freebsd.org/D10385
defines the keys differently than NIST does, so we have to muck with
key lengths and nonce/IVs to be standard compliant...
Remove the iv from secasvar as it was unused...
Add a counter protected by a mutex to ensure that the counter for GCM
and ICM will never be repeated.. This is a requirement for security..
I would use atomics, but we don't have a 64bit one on all platforms..
Fix a bug where IPsec was depending upon the OCF to ensure that the
blocksize was always at least 4 bytes to maintain alignment... Move
this logic into IPsec so changes to OCF won't break IPsec...
In one place, espx was always non-NULL, so don't test that it's
non-NULL before doing work..
minor style cleanups...
drop setting key and klen as they were not used...
Enforce that OCF won't pass invalid key lengths to AES that would
panic the machine...
This was has been tested by others too... I tested this against
NetBSD 6.1.5 using mini-test suite in
https://github.com/jmgurney/ipseccfgs and the only things that don't
pass are keyed md5 and sha1, and 3des-deriv (setkey syntax error),
all other modes listed in setkey's man page... The nice thing is
that NetBSD uses setkey, so same config files were used on both...
Reviewed by: gnn
for counter mode), and AES-GCM. Both of these modes have been added to
the aesni module.
Included is a set of tests to validate that the software and aesni
module calculate the correct values. These use the NIST KAT test
vectors. To run the test, you will need to install a soon to be
committed port, nist-kat that will install the vectors. Using a port
is necessary as the test vectors are around 25MB.
All the man pages were updated. I have added a new man page, crypto.7,
which includes a description of how to use each mode. All the new modes
and some other AES modes are present. It would be good for someone
else to go through and document the other modes.
A new ioctl was added to support AEAD modes which AES-GCM is one of them.
Without this ioctl, it is not possible to test AEAD modes from userland.
Add a timing safe bcmp for use to compare MACs. Previously we were using
bcmp which could leak timing info and result in the ability to forge
messages.
Add a minor optimization to the aesni module so that single segment
mbufs don't get copied and instead are updated in place. The aesni
module needs to be updated to support blocked IO so segmented mbufs
don't have to be copied.
We require that the IV be specified for all calls for both GCM and ICM.
This is to ensure proper use of these functions.
Obtained from: p4: //depot/projects/opencrypto
Relnotes: yes
Sponsored by: FreeBSD Foundation
Sponsored by: NetGate
swcr_newsession can change the pointer for swcr_sessions which races with
swcr_process which is looking up entries in this array.
Add a rwlock that protects changes to the array pointer so that
swcr_newsession and swcr_process no longer race.
Original patch by: Steve O'Hara-Smith <Steve.OHaraSmith@isilon.com>
Reviewed by: jmg
Sponsored by: EMC / Isilon Storage Division
probe method return BUS_PROBE_NOWILDCARD so it doesn't get attached to real
devices hanging off of nexus(4) with no specific devclass set. Actually, the
more desirable fix for this would be to get rid of the newbus interface of
cryptosoft(4) altogether but apparently crypto(9) was written with support
for cryptographic hardware in mind so that approach would require some KPI
breaking changes which don't seem worth it.
MFC after: 1 week
how hashed MD5/SHA are implemented, abusing Final() for padding and
sw_octx to transport the key from the beginning to the end.
Enlightened about what was going on here by: cperciva
Reviewed by: cperciva
MFC After: 3 days
X-MFC with: r187826
PR: kern/126468
the compression was useless as well. Make sure to not update the data
and return, else we would waste resources when decompressing.
This also avoids the copyback() changing data other consumers like
xform_ipcomp.c would have ignored because of no win and sent out without
noting that compression was used, resulting in invalid packets at the
receiver.
MFC after: 5 days
can cope with a result buffer of NULL in the "Final" function, we cannot.
Thus pass in a temporary buffer long enough for either md5 or sha1 results
so that we do not panic.
PR: bin/126468
MFC after: 1 week
