Commit 98efe78d authored by Niels Möller's avatar Niels Möller

New program eccparams.

parent be5b2eda
2018-03-10 Niels Möller <nisse@lysator.liu.se>
* eccparams.c (main): New program, to list parameter alternatives
for Pippenger's algorithm.
2018-02-20 Niels Möller <nisse@lysator.liu.se>
* testsuite/cmac-test.c (test_cmac_hash): Deallocate ctx properly.
......
......@@ -305,6 +305,10 @@ eccdata$(EXEEXT_FOR_BUILD): eccdata.c mini-gmp.c mini-gmp.h
$(CC_FOR_BUILD) `test -f eccdata.c || echo '$(srcdir)/'`eccdata.c \
-o eccdata$(EXEEXT_FOR_BUILD)
eccparams$(EXEEXT_FOR_BUILD): eccparams.c
$(CC_FOR_BUILD) `test -f eccparams.c || echo '$(srcdir)/'`eccparams.c \
-o eccparams$(EXEEXT_FOR_BUILD)
# desCore rules
# It seems using $(srcdir)/ doesn't work with GNU make 3.79.1
# des_headers = $(srcdir)/rotors.h $(srcdir)/keymap.h
......
#include <stdio.h>
#include <stdlib.h>
int
main (int argc, char **argv)
{
unsigned bits;
unsigned max;
unsigned c;
if (argc < 3)
{
usage:
fprintf(stderr, "Usage: %s: exp-bits max-entries\n", argv[0]);
return EXIT_FAILURE;
}
bits = atoi(argv[1]);
if (bits < 2)
goto usage;
max = atoi(argv[2]);
if ( max < 2)
goto usage;
for (c = 3; (1<<c) <= max; c++)
{
unsigned b;
for (b = 1;; b++)
{
unsigned s = (1<<c) * b;
unsigned k;
if (s > max)
break;
k = (bits + (c*b) - 1) / (c * b);
printf("k = %2u, c = %2u, S = %3u, T = %3u (%3u A + %2u D)\n",
k, c, s, (b+1)*k, b*k, k);
}
}
return 0;
}
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