Add the GPL v2 header to files where it was missing and is not from an
external source, update to the most recent version with the address.
Signed-off-by: David Sterba <dsterba@suse.com>
Internally it's blake2b but for the user facing output or other command
line interfaces let's call it just BLAKE2.
Signed-off-by: David Sterba <dsterba@suse.com>
With explicit width the default alignment is to the right, using space
is a gnu extension. Fix the following warnings:
crypto/hash-speedtest.c: In function ‘main’:
crypto/hash-speedtest.c:152:15: warning: ' ' flag used with ‘%s’ gnu_printf format [-Wformat=]
152 | printf("% 12s: ", c->name);
| ^
crypto/hash-speedtest.c:172:21: warning: ' ' flag used with ‘%u’ gnu_printf format [-Wformat=]
172 | printf("%s: % 12llu, %s/i % 8llu",
| ^
crypto/hash-speedtest.c:172:34: warning: ' ' flag used with ‘%u’ gnu_printf format [-Wformat=]
172 | printf("%s: % 12llu, %s/i % 8llu",
| ^
Signed-off-by: David Sterba <dsterba@suse.com>
For environments that require certified implementations of cryptographic
primitives allow to select a library providing them. The requirements
are SHA256 and BLAKE2 (with the 2b variant and 256 bit digest).
For now there are two: libgrcrypt and libsodium (openssl does not
provide the BLAKE2b-256). Accellerated versions are typically provided
and automatically selected.
Signed-off-by: David Sterba <dsterba@suse.com>
A simple tool to microbenchmark performance of the hashes. Uses rdtsc
for timing, so works only on x86_64.
$ make hash-speedtest
$ ./hash-speedtest [iterations]
Block size: 4096
Iterations: 100000
NULL-NOP: cycles: 56061823, c/i 560
NULL-MEMCPY: cycles: 61296469, c/i 612
CRC32C: cycles: 179961796, c/i 1799
XXHASH: cycles: 138434590, c/i 1384
Signed-off-by: David Sterba <dsterba@suse.com>
David Sterba
Adam Borowski