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The acomp, akcipher, and kpp algorithm types already have .report
methods defined, so there's no need to duplicate this functionality in
crypto_user itself; the duplicate functions are actually never executed.
Remove the unused code.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Passing string 'name' as the format specifier is potentially hazardous
because name could (although very unlikely to) have a format specifier
embedded in it causing issues when parsing the non-existent arguments
to these. Follow best practice by using the "%s" format string for
the string 'name'.
Cleans up clang warning:
crypto/pcrypt.c:397:40: warning: format string is not a string literal
(potentially insecure) [-Wformat-security]
Fixes: a3fb1e330dd2 ("pcrypt: Added sysfs interface to pcrypt")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Add AES128/192/256-CFB testvectors from NIST SP800-38A.
Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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crypto_cfb_decrypt_segment() incorrectly XOR'ed generated keystream with
IV, rather than with data stream, resulting in incorrect decryption.
Test vectors will be added in the next patch.
Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Make the ARM scalar AES implementation closer to constant-time by
disabling interrupts and prefetching the tables into L1 cache. This is
feasible because due to ARM's "free" rotations, the main tables are only
1024 bytes instead of the usual 4096 used by most AES implementations.
On ARM Cortex-A7, the speed loss is only about 5%. The resulting code
is still over twice as fast as aes_ti.c. Responsiveness is potentially
a concern, but interrupts are only disabled for a single AES block.
Note that even after these changes, the implementation still isn't
necessarily guaranteed to be constant-time; see
https://cr.yp.to/antiforgery/cachetiming-20050414.pdf for a discussion
of the many difficulties involved in writing truly constant-time AES
software. But it's valuable to make such attacks more difficult.
Much of this patch is based on patches suggested by Ard Biesheuvel.
Suggested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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In the "aes-fixed-time" AES implementation, disable interrupts while
accessing the S-box, in order to make cache-timing attacks more
difficult. Previously it was possible for the CPU to be interrupted
while the S-box was loaded into L1 cache, potentially evicting the
cachelines and causing later table lookups to be time-variant.
In tests I did on x86 and ARM, this doesn't affect performance
significantly. Responsiveness is potentially a concern, but interrupts
are only disabled for a single AES block.
Note that even after this change, the implementation still isn't
necessarily guaranteed to be constant-time; see
https://cr.yp.to/antiforgery/cachetiming-20050414.pdf for a discussion
of the many difficulties involved in writing truly constant-time AES
software. But it's valuable to make such attacks more difficult.
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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For preventing uninitialized data to be given to user-space (and so leak
potential useful data), the crypto_stat structure must be correctly
initialized.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Fixes: cac5818c25d0 ("crypto: user - Implement a generic crypto statistics")
Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
[EB: also fix it in crypto_reportstat_one()]
[EB: use sizeof(var) rather than sizeof(type)]
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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All bytes of the NETLINK_CRYPTO report structures must be initialized,
since they are copied to userspace. The change from strncpy() to
strlcpy() broke this. As a minimal fix, change it back.
Fixes: 4473710df1f8 ("crypto: user - Prepare for CRYPTO_MAX_ALG_NAME expansion")
Cc: <stable@vger.kernel.org> # v4.12+
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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The simd wrapper's skcipher request context structure consists
of a single subrequest whose size is taken from the subordinate
skcipher. However, in simd_skcipher_init(), the reqsize that is
retrieved is not from the subordinate skcipher but from the
cryptd request structure, whose size is completely unrelated to
the actual wrapped skcipher.
Reported-by: Qian Cai <cai@gmx.us>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Tested-by: Qian Cai <cai@gmx.us>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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The sign operation can operate in a non-hashed mode by running the RSA
sign operation directly on the input. This assumes that the input is
less than key_size_in_bytes - 11. Since the TPM performs its own PKCS1
padding, it isn't possible to support 'raw' mode, only 'pkcs1'.
Alternatively, a hashed version is also possible. In this variant the
input is hashed (by userspace) via the selected hash function first.
Then this implementation takes care of converting the hash to ASN.1
format and the sign operation is performed on the result. This is
similar to the implementation inside crypto/rsa-pkcs1pad.c.
ASN1 templates were copied from crypto/rsa-pkcs1pad.c. There seems to
be no easy way to expose that functionality, but likely the templates
should be shared somehow.
The sign operation is implemented via TPM_Sign operation on the TPM.
It is assumed that the TPM wrapped key provided uses
TPM_SS_RSASSAPKCS1v15_DER signature scheme. This allows the TPM_Sign
operation to work on data up to key_len_in_bytes - 11 bytes long.
In theory, we could also use TPM_Unbind instead of TPM_Sign, but we would
have to manually pkcs1 pad the digest first.
Signed-off-by: Denis Kenzior <denkenz@gmail.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Tested-by: Marcel Holtmann <marcel@holtmann.org>
Reviewed-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: James Morris <james.morris@microsoft.com>
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Signed-off-by: Denis Kenzior <denkenz@gmail.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Tested-by: Marcel Holtmann <marcel@holtmann.org>
Reviewed-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: James Morris <james.morris@microsoft.com>
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This patch implements the verify_signature operation. The public key
portion extracted from the TPM key blob is used. The operation is
performed entirely in software using the crypto API.
Signed-off-by: Denis Kenzior <denkenz@gmail.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Tested-by: Marcel Holtmann <marcel@holtmann.org>
Reviewed-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: James Morris <james.morris@microsoft.com>
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This patch implements the pkey_decrypt operation using the private key
blob. The blob is first loaded into the TPM via tpm_loadkey2. Once the
handle is obtained, tpm_unbind operation is used to decrypt the data on
the TPM and the result is returned. The key loaded by tpm_loadkey2 is
then evicted via tpm_flushspecific operation.
This patch assumes that the SRK authorization is a well known 20-byte of
zeros and the same holds for the key authorization of the provided key.
Signed-off-by: Denis Kenzior <denkenz@gmail.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Tested-by: Marcel Holtmann <marcel@holtmann.org>
Reviewed-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: James Morris <james.morris@microsoft.com>
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Signed-off-by: Denis Kenzior <denkenz@gmail.com>
Reviewed-by: James Morris <james.morris@microsoft.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Tested-by: Marcel Holtmann <marcel@holtmann.org>
Reviewed-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: James Morris <james.morris@microsoft.com>
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This commit adds TPM_LoadKey2 and TPM_FlushSpecific operations.
Signed-off-by: Denis Kenzior <denkenz@gmail.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: James Morris <james.morris@microsoft.com>
Tested-by: Marcel Holtmann <marcel@holtmann.org>
Reviewed-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: James Morris <james.morris@microsoft.com>
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This patch exposes some common functionality needed to send TPM commands.
Several functions from keys/trusted.c are exposed for use by the new tpm
key subtype and a module dependency is introduced.
In the future, common functionality between the trusted key type and the
asym_tpm subtype should be factored out into a common utility library.
Signed-off-by: Denis Kenzior <denkenz@gmail.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Tested-by: Marcel Holtmann <marcel@holtmann.org>
Reviewed-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: James Morris <james.morris@microsoft.com>
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This patch impelements the pkey_encrypt operation. The public key
portion extracted from the TPM key blob is used. The operation is
performed entirely in software using the crypto API.
Signed-off-by: Denis Kenzior <denkenz@gmail.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Tested-by: Marcel Holtmann <marcel@holtmann.org>
Reviewed-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: James Morris <james.morris@microsoft.com>
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This commit implements the pkey_query operation. This is accomplished
by utilizing the public key portion to obtain max encryption size
information for the operations that utilize the public key (encrypt,
verify). The private key size extracted from the TPM_Key data structure
is used to fill the information where the private key is used (decrypt,
sign).
The kernel uses a DER/BER format for public keys and does not support
setting the key via the raw binary form. To get around this a simple
DER/BER formatter is implemented which stores the DER/BER formatted key
and exponent in a temporary buffer for use by the crypto API.
The only exponent supported currently is 65537. This holds true for
other Linux TPM tools such as 'create_tpm_key' and
trousers-openssl_tpm_engine.
Signed-off-by: Denis Kenzior <denkenz@gmail.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Tested-by: Marcel Holtmann <marcel@holtmann.org>
Reviewed-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: James Morris <james.morris@microsoft.com>
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For TPM based keys, the only standard seems to be described here:
http://david.woodhou.se/draft-woodhouse-cert-best-practice.html#rfc.section.4.4
Quote from the relevant section:
"Rather, a common form of storage for "wrapped" keys is to encode the
binary TCPA_KEY structure in a single ASN.1 OCTET-STRING, and store the
result in PEM format with the tag "-----BEGIN TSS KEY BLOB-----". "
This patch implements the above behavior. It is assumed that the PEM
encoding is stripped out by userspace and only the raw DER/BER format is
provided. This is similar to how PKCS7, PKCS8 and X.509 keys are
handled.
Signed-off-by: Denis Kenzior <denkenz@gmail.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Tested-by: Marcel Holtmann <marcel@holtmann.org>
Reviewed-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: James Morris <james.morris@microsoft.com>
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The parsed BER/DER blob obtained from user space contains a TPM_Key
structure. This structure has some information about the key as well as
the public key portion.
This patch extracts this information for future use.
Signed-off-by: Denis Kenzior <denkenz@gmail.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Tested-by: Marcel Holtmann <marcel@holtmann.org>
Reviewed-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: James Morris <james.morris@microsoft.com>
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This patch adds the basic skeleton for the asym_tpm asymmetric key
subtype.
Signed-off-by: Denis Kenzior <denkenz@gmail.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Tested-by: Marcel Holtmann <marcel@holtmann.org>
Reviewed-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: James Morris <james.morris@microsoft.com>
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The original pkcs1pad implementation allowed to pad/unpad raw RSA
output. However, this has been taken out in commit:
commit c0d20d22e0ad ("crypto: rsa-pkcs1pad - Require hash to be present")
This patch restored this ability as it is needed by the asymmetric key
implementation.
Signed-off-by: Denis Kenzior <denkenz@gmail.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Tested-by: Marcel Holtmann <marcel@holtmann.org>
Reviewed-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: James Morris <james.morris@microsoft.com>
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Implement PKCS#8 RSA Private Key format [RFC 5208] parser for the
asymmetric key type. For the moment, this will only support unencrypted
DER blobs. PEM and decryption can be added later.
PKCS#8 keys can be loaded like this:
openssl pkcs8 -in private_key.pem -topk8 -nocrypt -outform DER | \
keyctl padd asymmetric foo @s
Signed-off-by: David Howells <dhowells@redhat.com>
Tested-by: Marcel Holtmann <marcel@holtmann.org>
Reviewed-by: Marcel Holtmann <marcel@holtmann.org>
Reviewed-by: Denis Kenzior <denkenz@gmail.com>
Tested-by: Denis Kenzior <denkenz@gmail.com>
Signed-off-by: James Morris <james.morris@microsoft.com>
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Implement the encrypt, decrypt and sign operations for the software
asymmetric key subtype. This mostly involves offloading the call to the
crypto layer.
Note that the decrypt and sign operations require a private key to be
supplied. Encrypt (and also verify) will work with either a public or a
private key. A public key can be supplied with an X.509 certificate and a
private key can be supplied using a PKCS#8 blob:
# j=`openssl pkcs8 -in ~/pkcs7/firmwarekey2.priv -topk8 -nocrypt -outform DER | keyctl padd asymmetric foo @s`
# keyctl pkey_query $j - enc=pkcs1
key_size=4096
max_data_size=512
max_sig_size=512
max_enc_size=512
max_dec_size=512
encrypt=y
decrypt=y
sign=y
verify=y
# keyctl pkey_encrypt $j 0 data enc=pkcs1 >/tmp/enc
# keyctl pkey_decrypt $j 0 /tmp/enc enc=pkcs1 >/tmp/dec
# cmp data /tmp/dec
# keyctl pkey_sign $j 0 data enc=pkcs1 hash=sha1 >/tmp/sig
# keyctl pkey_verify $j 0 data /tmp/sig enc=pkcs1 hash=sha1
#
Signed-off-by: David Howells <dhowells@redhat.com>
Tested-by: Marcel Holtmann <marcel@holtmann.org>
Reviewed-by: Marcel Holtmann <marcel@holtmann.org>
Reviewed-by: Denis Kenzior <denkenz@gmail.com>
Tested-by: Denis Kenzior <denkenz@gmail.com>
Signed-off-by: James Morris <james.morris@microsoft.com>
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Put a flag in the public_key struct to indicate if the structure is holding
a private key. The private key must be held ASN.1 encoded in the format
specified in RFC 3447 A.1.2. This is the form required by crypto/rsa.c.
The software encryption subtype's verification and query functions then
need to select the appropriate crypto function to set the key.
Signed-off-by: David Howells <dhowells@redhat.com>
Tested-by: Marcel Holtmann <marcel@holtmann.org>
Reviewed-by: Marcel Holtmann <marcel@holtmann.org>
Reviewed-by: Denis Kenzior <denkenz@gmail.com>
Tested-by: Denis Kenzior <denkenz@gmail.com>
Signed-off-by: James Morris <james.morris@microsoft.com>
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Provide a query function for the software public key implementation. This
permits information about such a key to be obtained using
query_asymmetric_key() or KEYCTL_PKEY_QUERY.
Signed-off-by: David Howells <dhowells@redhat.com>
Tested-by: Marcel Holtmann <marcel@holtmann.org>
Reviewed-by: Marcel Holtmann <marcel@holtmann.org>
Reviewed-by: Denis Kenzior <denkenz@gmail.com>
Tested-by: Denis Kenzior <denkenz@gmail.com>
Signed-off-by: James Morris <james.morris@microsoft.com>
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Make the X.509 and PKCS7 parsers fill in the signature encoding type field
recently added to the public_key_signature struct.
Signed-off-by: David Howells <dhowells@redhat.com>
Tested-by: Marcel Holtmann <marcel@holtmann.org>
Reviewed-by: Marcel Holtmann <marcel@holtmann.org>
Reviewed-by: Denis Kenzior <denkenz@gmail.com>
Tested-by: Denis Kenzior <denkenz@gmail.com>
Signed-off-by: James Morris <james.morris@microsoft.com>
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Provide the missing asymmetric key subops for new key type ops. This
include query, encrypt, decrypt and create signature. Verify signature
already exists. Also provided are accessor functions for this:
int query_asymmetric_key(const struct key *key,
struct kernel_pkey_query *info);
int encrypt_blob(struct kernel_pkey_params *params,
const void *data, void *enc);
int decrypt_blob(struct kernel_pkey_params *params,
const void *enc, void *data);
int create_signature(struct kernel_pkey_params *params,
const void *data, void *enc);
The public_key_signature struct gains an encoding field to carry the
encoding for verify_signature().
Signed-off-by: David Howells <dhowells@redhat.com>
Tested-by: Marcel Holtmann <marcel@holtmann.org>
Reviewed-by: Marcel Holtmann <marcel@holtmann.org>
Reviewed-by: Denis Kenzior <denkenz@gmail.com>
Tested-by: Denis Kenzior <denkenz@gmail.com>
Signed-off-by: James Morris <james.morris@microsoft.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto updates from Herbert Xu:
"API:
- Remove VLA usage
- Add cryptostat user-space interface
- Add notifier for new crypto algorithms
Algorithms:
- Add OFB mode
- Remove speck
Drivers:
- Remove x86/sha*-mb as they are buggy
- Remove pcbc(aes) from x86/aesni
- Improve performance of arm/ghash-ce by up to 85%
- Implement CTS-CBC in arm64/aes-blk, faster by up to 50%
- Remove PMULL based arm64/crc32 driver
- Use PMULL in arm64/crct10dif
- Add aes-ctr support in s5p-sss
- Add caam/qi2 driver
Others:
- Pick better transform if one becomes available in crc-t10dif"
* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (124 commits)
crypto: chelsio - Update ntx queue received from cxgb4
crypto: ccree - avoid implicit enum conversion
crypto: caam - add SPDX license identifier to all files
crypto: caam/qi - simplify CGR allocation, freeing
crypto: mxs-dcp - make symbols 'sha1_null_hash' and 'sha256_null_hash' static
crypto: arm64/aes-blk - ensure XTS mask is always loaded
crypto: testmgr - fix sizeof() on COMP_BUF_SIZE
crypto: chtls - remove set but not used variable 'csk'
crypto: axis - fix platform_no_drv_owner.cocci warnings
crypto: x86/aes-ni - fix build error following fpu template removal
crypto: arm64/aes - fix handling sub-block CTS-CBC inputs
crypto: caam/qi2 - avoid double export
crypto: mxs-dcp - Fix AES issues
crypto: mxs-dcp - Fix SHA null hashes and output length
crypto: mxs-dcp - Implement sha import/export
crypto: aegis/generic - fix for big endian systems
crypto: morus/generic - fix for big endian systems
crypto: lrw - fix rebase error after out of bounds fix
crypto: cavium/nitrox - use pci_alloc_irq_vectors() while enabling MSI-X.
crypto: cavium/nitrox - NITROX command queue changes.
...
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This reverts commit dd979b4df817e9976f18fb6f9d134d6bc4a3c317.
This broke tcp_poll for SMC fallback: An AF_SMC socket establishes an
internal TCP socket for the initial handshake with the remote peer.
Whenever the SMC connection can not be established this TCP socket is
used as a fallback. All socket operations on the SMC socket are then
forwarded to the TCP socket. In case of poll, the file->private_data
pointer references the SMC socket because the TCP socket has no file
assigned. This causes tcp_poll to wait on the wrong socket.
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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After allocation, output and decomp_output both point to memory chunks of
size COMP_BUF_SIZE. Then, only the first bytes are zeroed out using
sizeof(COMP_BUF_SIZE) as parameter to memset(), because
sizeof(COMP_BUF_SIZE) provides the size of the constant and not the size of
allocated memory.
Instead, the whole allocated memory is meant to be zeroed out. Use
COMP_BUF_SIZE as parameter to memset() directly in order to accomplish
this.
Fixes: 336073840a872 ("crypto: testmgr - Allow different compression results")
Signed-off-by: Michael Schupikov <michael@schupikov.de>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Use the correct __le32 annotation and accessors to perform the
single round of AES encryption performed inside the AEGIS transform.
Otherwise, tcrypt reports:
alg: aead: Test 1 failed on encryption for aegis128-generic
00000000: 6c 25 25 4a 3c 10 1d 27 2b c1 d4 84 9a ef 7f 6e
alg: aead: Test 1 failed on encryption for aegis128l-generic
00000000: cd c6 e3 b8 a0 70 9d 8e c2 4f 6f fe 71 42 df 28
alg: aead: Test 1 failed on encryption for aegis256-generic
00000000: aa ed 07 b1 96 1d e9 e6 f2 ed b5 8e 1c 5f dc 1c
Fixes: f606a88e5823 ("crypto: aegis - Add generic AEGIS AEAD implementations")
Cc: <stable@vger.kernel.org> # v4.18+
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Ondrej Mosnacek <omosnace@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Omit the endian swabbing when folding the lengths of the assoc and
crypt input buffers into the state to finalize the tag. This is not
necessary given that the memory representation of the state is in
machine native endianness already.
This fixes an error reported by tcrypt running on a big endian system:
alg: aead: Test 2 failed on encryption for morus640-generic
00000000: a8 30 ef fb e6 26 eb 23 b0 87 dd 98 57 f3 e1 4b
00000010: 21
alg: aead: Test 2 failed on encryption for morus1280-generic
00000000: 88 19 1b fb 1c 29 49 0e ee 82 2f cb 97 a6 a5 ee
00000010: 5f
Fixes: 396be41f16fd ("crypto: morus - Add generic MORUS AEAD implementations")
Cc: <stable@vger.kernel.org> # v4.18+
Reviewed-by: Ondrej Mosnacek <omosnace@redhat.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Due to an unfortunate interaction between commit fbe1a850b3b1
("crypto: lrw - Fix out-of bounds access on counter overflow") and
commit c778f96bf347 ("crypto: lrw - Optimize tweak computation"),
we ended up with a version of next_index() that always returns 127.
Fixes: c778f96bf347 ("crypto: lrw - Optimize tweak computation")
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Ondrej Mosnacek <omosnace@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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For historical reasons, the AES-NI based implementation of the PCBC
chaining mode uses a special FPU chaining mode wrapper template to
amortize the FPU start/stop overhead over multiple blocks.
When this FPU wrapper was introduced, it supported widely used
chaining modes such as XTS and CTR (as well as LRW), but currently,
PCBC is the only remaining user.
Since there are no known users of pcbc(aes) in the kernel, let's remove
this special driver, and rely on the generic pcbc driver to encapsulate
the AES-NI core cipher.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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We already have OFB test vectors and tcrypt OFB speed tests.
Add OFB functional tests to tcrypt as well.
Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Add a generic version of output feedback mode. We already have support of
several hardware based transformations of this mode and the needed test
vectors but we somehow missed adding a generic software one. Fix this now.
Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Add additional test vectors from "The SM4 Blockcipher Algorithm And Its
Modes Of Operations" draft-ribose-cfrg-sm4-10 and register cipher speed
tests for sm4.
Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Commit 110492183c4b ("crypto: compress - remove unused pcomp interface")
removed pcomp interface but missed cleaning up tcrypt.
Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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This patch implement a generic way to get statistics about all crypto
usages.
Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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In the quest to remove all stack VLA usage from the kernel[1], this
replaces struct crypto_skcipher and SKCIPHER_REQUEST_ON_STACK() usage
with struct crypto_sync_skcipher and SYNC_SKCIPHER_REQUEST_ON_STACK(),
which uses a fixed stack size.
[1] https://lkml.kernel.org/r/CA+55aFzCG-zNmZwX4A2FQpadafLfEzK6CC=qPXydAacU1RqZWA@mail.gmail.com
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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In the quest to remove all stack VLA usage from the kernel[1], this
replaces struct crypto_skcipher and SKCIPHER_REQUEST_ON_STACK() usage
with struct crypto_sync_skcipher and SYNC_SKCIPHER_REQUEST_ON_STACK(),
which uses a fixed stack size.
[1] https://lkml.kernel.org/r/CA+55aFzCG-zNmZwX4A2FQpadafLfEzK6CC=qPXydAacU1RqZWA@mail.gmail.com
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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In preparation for removal of VLAs due to skcipher requests on the stack
via SKCIPHER_REQUEST_ON_STACK() usage, this introduces the infrastructure
for the "sync skcipher" tfm, which is for handling the on-stack cases of
skcipher, which are always non-ASYNC and have a known limited request
size.
The crypto API additions:
struct crypto_sync_skcipher (wrapper for struct crypto_skcipher)
crypto_alloc_sync_skcipher()
crypto_free_sync_skcipher()
crypto_sync_skcipher_setkey()
crypto_sync_skcipher_get_flags()
crypto_sync_skcipher_set_flags()
crypto_sync_skcipher_clear_flags()
crypto_sync_skcipher_blocksize()
crypto_sync_skcipher_ivsize()
crypto_sync_skcipher_reqtfm()
skcipher_request_set_sync_tfm()
SYNC_SKCIPHER_REQUEST_ON_STACK() (with tfm type check)
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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The encryption mode of pkcs1pad never uses out_sg and out_buf, so
there's no need to allocate the buffer, which presently is not even
being freed.
CC: Herbert Xu <herbert@gondor.apana.org.au>
CC: linux-crypto@vger.kernel.org
CC: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Dan Aloni <dan@kernelim.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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This patch simplifies the LRW template to recompute the LRW tweaks from
scratch in the second pass and thus also removes the need to allocate a
dynamic buffer using kmalloc().
As discussed at [1], the use of kmalloc causes deadlocks with dm-crypt.
PERFORMANCE MEASUREMENTS (x86_64)
Performed using: https://gitlab.com/omos/linux-crypto-bench
Crypto driver used: lrw(ecb-aes-aesni)
The results show that the new code has about the same performance as the
old code. For 512-byte message it seems to be even slightly faster, but
that might be just noise.
Before:
ALGORITHM KEY (b) DATA (B) TIME ENC (ns) TIME DEC (ns)
lrw(aes) 256 64 200 203
lrw(aes) 320 64 202 204
lrw(aes) 384 64 204 205
lrw(aes) 256 512 415 415
lrw(aes) 320 512 432 440
lrw(aes) 384 512 449 451
lrw(aes) 256 4096 1838 1995
lrw(aes) 320 4096 2123 1980
lrw(aes) 384 4096 2100 2119
lrw(aes) 256 16384 7183 6954
lrw(aes) 320 16384 7844 7631
lrw(aes) 384 16384 8256 8126
lrw(aes) 256 32768 14772 14484
lrw(aes) 320 32768 15281 15431
lrw(aes) 384 32768 16469 16293
After:
ALGORITHM KEY (b) DATA (B) TIME ENC (ns) TIME DEC (ns)
lrw(aes) 256 64 197 196
lrw(aes) 320 64 200 197
lrw(aes) 384 64 203 199
lrw(aes) 256 512 385 380
lrw(aes) 320 512 401 395
lrw(aes) 384 512 415 415
lrw(aes) 256 4096 1869 1846
lrw(aes) 320 4096 2080 1981
lrw(aes) 384 4096 2160 2109
lrw(aes) 256 16384 7077 7127
lrw(aes) 320 16384 7807 7766
lrw(aes) 384 16384 8108 8357
lrw(aes) 256 32768 14111 14454
lrw(aes) 320 32768 15268 15082
lrw(aes) 384 32768 16581 16250
[1] https://lkml.org/lkml/2018/8/23/1315
Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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This patch rewrites the tweak computation to a slightly simpler method
that performs less bswaps. Based on performance measurements the new
code seems to provide slightly better performance than the old one.
PERFORMANCE MEASUREMENTS (x86_64)
Performed using: https://gitlab.com/omos/linux-crypto-bench
Crypto driver used: lrw(ecb-aes-aesni)
Before:
ALGORITHM KEY (b) DATA (B) TIME ENC (ns) TIME DEC (ns)
lrw(aes) 256 64 204 286
lrw(aes) 320 64 227 203
lrw(aes) 384 64 208 204
lrw(aes) 256 512 441 439
lrw(aes) 320 512 456 455
lrw(aes) 384 512 469 483
lrw(aes) 256 4096 2136 2190
lrw(aes) 320 4096 2161 2213
lrw(aes) 384 4096 2295 2369
lrw(aes) 256 16384 7692 7868
lrw(aes) 320 16384 8230 8691
lrw(aes) 384 16384 8971 8813
lrw(aes) 256 32768 15336 15560
lrw(aes) 320 32768 16410 16346
lrw(aes) 384 32768 18023 17465
After:
ALGORITHM KEY (b) DATA (B) TIME ENC (ns) TIME DEC (ns)
lrw(aes) 256 64 200 203
lrw(aes) 320 64 202 204
lrw(aes) 384 64 204 205
lrw(aes) 256 512 415 415
lrw(aes) 320 512 432 440
lrw(aes) 384 512 449 451
lrw(aes) 256 4096 1838 1995
lrw(aes) 320 4096 2123 1980
lrw(aes) 384 4096 2100 2119
lrw(aes) 256 16384 7183 6954
lrw(aes) 320 16384 7844 7631
lrw(aes) 384 16384 8256 8126
lrw(aes) 256 32768 14772 14484
lrw(aes) 320 32768 15281 15431
lrw(aes) 384 32768 16469 16293
Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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This patch adds a test vector for lrw(aes) that triggers wrap-around of
the counter, which is a tricky corner case.
Suggested-by: Eric Biggers <ebiggers@kernel.org>
Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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When the LRW block counter overflows, the current implementation returns
128 as the index to the precomputed multiplication table, which has 128
entries. This patch fixes it to return the correct value (127).
Fixes: 64470f1b8510 ("[CRYPTO] lrw: Liskov Rivest Wagner, a tweakable narrow block cipher mode")
Cc: <stable@vger.kernel.org> # 2.6.20+
Reported-by: Eric Biggers <ebiggers@kernel.org>
Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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ghash is a keyed hash algorithm, thus setkey needs to be called.
Otherwise the following error occurs:
$ modprobe tcrypt mode=318 sec=1
testing speed of async ghash-generic (ghash-generic)
tcrypt: test 0 ( 16 byte blocks, 16 bytes per update, 1 updates):
tcrypt: hashing failed ret=-126
Cc: <stable@vger.kernel.org> # 4.6+
Fixes: 0660511c0bee ("crypto: tcrypt - Use ahash")
Tested-by: Franck Lenormand <franck.lenormand@nxp.com>
Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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In commit 9f480faec58c ("crypto: chacha20 - Fix keystream alignment for
chacha20_block()"), I had missed that chacha20_block() can be called
directly on the buffer passed to get_random_bytes(), which can have any
alignment. So, while my commit didn't break anything, it didn't fully
solve the alignment problems.
Revert my solution and just update chacha20_block() to use
put_unaligned_le32(), so the output buffer need not be aligned.
This is simpler, and on many CPUs it's the same speed.
But, I kept the 'tmp' buffers in extract_crng_user() and
_get_random_bytes() 4-byte aligned, since that alignment is actually
needed for _crng_backtrack_protect() too.
Reported-by: Stephan Müller <smueller@chronox.de>
Cc: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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