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d95312a3cc
linux/include/crypto
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Ard Biesheuvel d95312a3cc crypto: lib/chacha20poly1305 - reimplement crypt_from_sg() routine 
Reimplement the library routines to perform chacha20poly1305 en/decryption
on scatterlists, without [ab]using the [deprecated] blkcipher interface,
which is rather heavyweight and does things we don't really need.

Instead, we use the sg_miter API in a novel and clever way, to iterate
over the scatterlist in-place (i.e., source == destination, which is the
only way this library is expected to be used). That way, we don't have to
iterate over two scatterlists in parallel.

Another optimization is that, instead of relying on the blkcipher walker
to present the input in suitable chunks, we recognize that ChaCha is a
streamcipher, and so we can simply deal with partial blocks by keeping a
block of cipherstream on the stack and use crypto_xor() to mix it with
the in/output.

Finally, we omit the scatterwalk_and_copy() call if the last element of
the scatterlist covers the MAC as well (which is the common case),
avoiding the need to walk the scatterlist and kmap() the page twice.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2019-11-17 09:02:44 +08:00
..
internal crypto: blake2s - implement generic shash driver 2019-11-17 09:02:42 +08:00
acompress.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
aead.h Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2019-07-08 20:57:08 -07:00
aes.h crypto: aes - helper function to validate key length for AES algorithms 2019-08-09 15:11:43 +10:00
akcipher.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
algapi.h crypto: skcipher - remove the "blkcipher" algorithm type 2019-11-01 13:38:32 +08:00
arc4.h crypto: arc4 - refactor arc4 core code into separate library 2019-06-20 14:18:33 +08:00
asym_tpm_subtype.h KEYS: asym_tpm: extract key size & public key [ver #2] 2018-10-26 09:30:46 +01:00
authenc.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
b128ops.h [CRYPTO] lib: some common 128-bit block operations, nicely centralized 2006-12-06 18:38:55 -08:00
blake2s.h crypto: blake2s - generic C library implementation and selftest 2019-11-17 09:02:42 +08:00
blowfish.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
cast5.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
cast6.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
cast_common.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
cbc.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
chacha20poly1305.h crypto: lib/chacha20poly1305 - reimplement crypt_from_sg() routine 2019-11-17 09:02:44 +08:00
chacha.h crypto: x86/chacha - expose SIMD ChaCha routine as library function 2019-11-17 09:02:39 +08:00
cryptd.h crypto: cryptd - remove ability to instantiate ablkciphers 2019-04-18 22:15:04 +08:00
ctr.h crypto: ctr - add helper for performing a CTR encryption walk 2019-07-26 14:56:07 +10:00
curve25519.h crypto: curve25519 - generic C library implementations 2019-11-17 09:02:43 +08:00
des.h crypto: des - remove now unused __des3_ede_setkey() 2019-08-22 14:57:33 +10:00
dh.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
drbg.h crypto: drbg - add FIPS 140-2 CTRNG for noise source 2019-05-23 14:01:06 +08:00
ecdh.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
engine.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
gcm.h crypto: gcm - helper functions for assoclen/authsize check 2019-08-09 15:11:41 +10:00
gf128mul.h crypto: gf128mul - The x8_ble multiplication functions 2017-11-03 21:50:43 +08:00
ghash.h crypto: ghash - add comment and improve help text 2019-07-27 21:08:38 +10:00
hash_info.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
hash.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
hmac.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
if_alg.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
kpp.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
md5.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
nhpoly1305.h crypto: nhpoly1305 - add NHPoly1305 support 2018-11-20 14:26:56 +08:00
null.h crypto: null - Remove VLA usage of skcipher 2018-09-28 12:46:08 +08:00
padlock.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
pcrypt.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 335 2019-06-05 17:37:06 +02:00
pkcs7.h PKCS#7: Introduce pkcs7_get_digest() 2019-08-05 18:40:19 -04:00
poly1305.h crypto: poly1305 - expose init/update/final library interface 2019-11-17 09:02:41 +08:00
public_key.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36 2019-05-24 17:27:11 +02:00
rng.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
scatterwalk.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
serpent.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sha1_base.h crypto: add header include guards 2019-08-02 14:44:02 +10:00
sha3.h crypto: sha3-generic - export init/update/final routines 2018-01-26 01:10:34 +11:00
sha256_base.h crypto: sha256 - Remove sha256/224_init code duplication 2019-09-05 14:54:54 +10:00
sha512_base.h crypto: add header include guards 2019-08-02 14:44:02 +10:00
sha.h crypto: sha256 - Remove sha256/224_init code duplication 2019-09-05 14:54:54 +10:00
skcipher.h crypto: skcipher - remove the "blkcipher" algorithm type 2019-11-01 13:38:32 +08:00
sm3_base.h crypto: add header include guards 2019-08-02 14:44:02 +10:00
sm3.h crypto: sm3 - add OSCCA SM3 secure hash 2017-09-22 17:43:07 +08:00
sm4.h crypto: sm4 - export encrypt/decrypt routines to other drivers 2018-05-05 14:52:51 +08:00
streebog.h crypto: streebog - fix unaligned memory accesses 2019-04-08 14:42:55 +08:00
twofish.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
xts.h crypto: clarify name of WEAK_KEY request flag 2019-01-25 18:41:52 +08:00