gboolean simpleprng_verify_buffer(
simpleprng_state_t *state,
gpointer buf,
size_t len)
{
guint8 *p = buf;
while (len--) {
guint64 count = state->count;
guint8 expected = simpleprng_rand_byte(state);
guint8 got = *p;
if (expected != got) {
int remaining = MIN(len, 16);
guint8 expbytes[16] = { expected };
char *gotstr = hexstr(p, remaining);
char *expstr;
int i;
for (i = 1; i < remaining; i++)
expbytes[i] = simpleprng_rand_byte(state);
expstr = hexstr(expbytes, remaining);
g_fprintf(stderr,
"random value mismatch at offset %ju: got %s, expected %s\n",
(uintmax_t)count, gotstr, expstr);
g_free(gotstr);
g_free(expstr);
return FALSE;
}
p++;
}
return TRUE;
}
static int
test_roundtrip_rand(void)
{
int i, ret;
simpleprng_state_t state;
char *in, *tmp_enc = NULL, *tmp_dec = NULL;
size_t size;
GError *err = NULL;
simpleprng_seed(&state, 0xface);
ret = TRUE;
for (i = 0; i < 100; i++) {
size = simpleprng_rand_byte(&state);
in = g_malloc0(size+1);
simpleprng_fill_buffer(&state, in, size);
tmp_enc = hexencode_string(in);
tmp_dec = tmp_enc? hexdecode_string(tmp_enc, &err) : NULL;
if (!tmp_enc || !tmp_dec || strcmp(in, tmp_dec) || err) {
ret = FALSE;
tu_dbg("roundtrip failure:\n")
tu_dbg("input: \"%s\"\n", in);
tu_dbg("enc output: \"%s\"\n", tmp_enc? tmp_enc : "(null)");
tu_dbg("dec output: \"%s\"\n", tmp_dec? tmp_dec : "(null)");
tu_dbg("error msg: %s\n", err? err->message : "(none)");
}
g_clear_error(&err);
amfree(tmp_enc);
amfree(tmp_dec);
g_free(in);
}
return ret;
}
void simpleprng_fill_buffer(
simpleprng_state_t *state,
gpointer buf,
size_t len)
{
guint8 *p = buf;
while (len--) {
*(p++) = simpleprng_rand_byte(state);
}
}
gboolean simpleprng_verify_buffer(
simpleprng_state_t *state,
gpointer buf,
size_t len)
{
guint8 *p = buf;
while (len--) {
guint8 expected = simpleprng_rand_byte(state);
guint8 got = *p;
if (expected != got) {
g_fprintf(stderr,
"random value mismatch in buffer %p, offset %zd: got 0x%02x, expected 0x%02x\n",
buf, (size_t)(p-(guint8*)buf), (int)got, (int)expected);
return FALSE;
}
p++;
}
return TRUE;
}
