On Mon, Apr 23, 2018 at 1:17 PM, Matteo Croce <mcr...@redhat.com> wrote: > 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 >
I understand that this won't compile on systems other than Linux, I will make a v2 which uses proper macros to avoid build failures on non Linux systems, if this patchset is found to be useful. Created PR #4 on the GitHub mirror for review and comments via GH interface. -- Matteo Croce per aspera ad upstream
