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[PATCH 0/4] Use AF_ALG in checksum utilities
From: |
Matteo Croce |
Subject: |
[PATCH 0/4] Use AF_ALG in checksum utilities |
Date: |
Mon, 23 Apr 2018 13:17:15 +0200 |
Let md5sum and all sha*sum utilities use Linux kernel cryptographic API via the
AF_ALG address family.
Speed gain depends on the CPU type:
Xeon E3-1265L V2:
$ truncate -s 2GB 2g.bin
$ time sha1sum 2g.bin
752ef2367f479e79e4f0cded9c270c2890506ab0 2g.bin
real 0m4.829s
user 0m4.437s
sys 0m0.391s
$ time ./sha1sum-afalg 2g.bin
752ef2367f479e79e4f0cded9c270c2890506ab0 2g.bin
real 0m3.164s
user 0m0.000s
sys 0m3.162s
Xeon E3-1240 v6:
$ time sha1sum disk.qcow2
47be301f86c71c20eae4ccc5bab4c02e09e729a4 disk.qcow2
real 0m28.390s
user 0m13.352s
sys 0m1.376s
$ time ./sha1sum-afalg disk.qcow2
47be301f86c71c20eae4ccc5bab4c02e09e729a4 disk.qcow2
real 0m8.373s
user 0m0.052s
sys 0m8.308s
Marvell Armada 8040 - MACCHIATOBin Dual shot:
$ dd if=/dev/zero bs=1G count=10 |time -p sha1sum
a0b6e2ca4e28360a929943e8eb966f703a69dc44 2g.bin
real 0m49.390s
user 0m46.852s
sys 0m2.076s
$ dd if=/dev/zero bs=1G count=10 |time -p ./sha1sum-afalg
a0b6e2ca4e28360a929943e8eb966f703a69dc44 2g.bin
real 0m15.104s
user 0m0.052s
sys 0m15.008s
Correctness of the implementation was tested with the following script:
for alg in md5sum sha1sum sha224sum sha256sum sha384sum sha512sum; do
for len in 0 1 1234 4000222; do
hash1=$(dd status=none if=/dev/zero bs=1 count=$len |$alg)
hash2=$(dd status=none if=/dev/zero bs=1 count=$len |src/$alg)
[ "$hash1" = "$hash2" ] || exec echo "$alg: hash differs with data
length $len!"
done
done
Matteo Croce (4):
sha1sum: use AF_ALG when available
sha256sum: use kernel crypto API
sha512sum: use kernel crypto API
md5sum: use kernel crypto API
lib/af_alg.c | 102 ++++++++++++++++++++++++++++++++++++++++++++++++++
lib/af_alg.h | 46 +++++++++++++++++++++++
lib/md5.c | 14 ++++++-
lib/sha1.c | 13 ++++++-
lib/sha256.c | 26 ++++++++++++-
lib/sha512.c | 26 ++++++++++++-
modules/crypto/md5 | 5 ++-
modules/crypto/sha1 | 5 ++-
modules/crypto/sha256 | 5 ++-
modules/crypto/sha512 | 5 ++-
10 files changed, 237 insertions(+), 10 deletions(-)
create mode 100644 lib/af_alg.c
create mode 100644 lib/af_alg.h
--
2.14.3