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Add some conditionally-compilable diagnostics to the RNG. I got

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briefly worried that it might not be doing what I thought it was
doing, but examining these diagnostics shows that it is after all, and
now I've written them it would be a shame not to keep them for future
use.

[originally from svn r9938]
This commit is contained in:
Simon Tatham
2013-07-19 17:44:58 +00:00
parent 407fd7b9ab
commit 8966f7c1ea
2 changed files with 103 additions and 0 deletions
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75
sshrand.c
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@ -49,6 +49,10 @@ static struct RandPool pool;
int random_active = 0;
long next_noise_collection;
#ifdef RANDOM_DIAGNOSTICS
int random_diagnostics = 0;
#endif
static void random_stir(void)
{
word32 block[HASHINPUT / sizeof(word32)];
@ -65,6 +69,30 @@ static void random_stir(void)
noise_get_light(random_add_noise);
#ifdef RANDOM_DIAGNOSTICS
{
int p, q;
printf("random stir starting\npool:\n");
for (p = 0; p < POOLSIZE; p += HASHSIZE) {
printf(" ");
for (q = 0; q < HASHSIZE; q += 4) {
printf(" %08x", *(word32 *)(pool.pool + p + q));
}
printf("\n");
}
printf("incoming:\n ");
for (q = 0; q < HASHSIZE; q += 4) {
printf(" %08x", *(word32 *)(pool.incoming + q));
}
printf("\nincomingb:\n ");
for (q = 0; q < HASHINPUT; q += 4) {
printf(" %08x", *(word32 *)(pool.incomingb + q));
}
printf("\n");
random_diagnostics++;
}
#endif
SHATransform((word32 *) pool.incoming, (word32 *) pool.incomingb);
pool.incomingpos = 0;
@ -116,6 +144,29 @@ static void random_stir(void)
for (k = 0; k < sizeof(digest) / sizeof(*digest); k++)
((word32 *) (pool.pool + j))[k] = digest[k];
}
#ifdef RANDOM_DIAGNOSTICS
if (i == 0) {
int p, q;
printf("random stir midpoint\npool:\n");
for (p = 0; p < POOLSIZE; p += HASHSIZE) {
printf(" ");
for (q = 0; q < HASHSIZE; q += 4) {
printf(" %08x", *(word32 *)(pool.pool + p + q));
}
printf("\n");
}
printf("incoming:\n ");
for (q = 0; q < HASHSIZE; q += 4) {
printf(" %08x", *(word32 *)(pool.incoming + q));
}
printf("\nincomingb:\n ");
for (q = 0; q < HASHINPUT; q += 4) {
printf(" %08x", *(word32 *)(pool.incomingb + q));
}
printf("\n");
}
#endif
}
/*
@ -128,6 +179,30 @@ static void random_stir(void)
pool.poolpos = sizeof(pool.incoming);
pool.stir_pending = FALSE;
#ifdef RANDOM_DIAGNOSTICS
{
int p, q;
printf("random stir done\npool:\n");
for (p = 0; p < POOLSIZE; p += HASHSIZE) {
printf(" ");
for (q = 0; q < HASHSIZE; q += 4) {
printf(" %08x", *(word32 *)(pool.pool + p + q));
}
printf("\n");
}
printf("incoming:\n ");
for (q = 0; q < HASHSIZE; q += 4) {
printf(" %08x", *(word32 *)(pool.incoming + q));
}
printf("\nincomingb:\n ");
for (q = 0; q < HASHINPUT; q += 4) {
printf(" %08x", *(word32 *)(pool.incomingb + q));
}
printf("\n");
random_diagnostics--;
}
#endif
}
void random_add_noise(void *noise, int length)