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/* Test of message digests.
Copyright (C) 2018-2023 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
static void
test_digest_on_files (int (*streamfunc) (FILE *, void *),
const char *streamfunc_name,
size_t digest_size,
const void *expected_for_empty_file,
const void *expected_for_small_file,
const void *expected_for_large_file)
{
int pass;
unlink (TESTFILE);
for (pass = 0; pass < 5; pass++)
{
{
FILE *fp = fopen (TESTFILE, "wb");
if (fp == NULL)
{
fprintf (stderr, "Could not create file %s.\n", TESTFILE);
exit (1);
}
switch (pass)
{
case 0:
/* Nothing to do for the empty file. */
break;
case 2:
/* Fill the small file, with some header that will be skipped. */
fputs ("ABCD", fp);
FALLTHROUGH;
case 1:
/* Fill the small file. */
fputs ("The quick brown fox jumps over the lazy dog.\n", fp);
break;
case 4:
/* Fill the large file, with some header that will be skipped. */
fputs ("ABCD", fp);
FALLTHROUGH;
case 3:
/* Fill the large file (8 MiB). */
{
unsigned int i;
for (i = 0; i < 0x400000; i++)
{
unsigned char c[2];
unsigned int j = i * (i-1) * (i-5);
c[0] = (unsigned char)(j >> 6);
c[1] = (i % 499) + (i % 101);
fwrite (c, 1, 2, fp);
}
}
break;
}
if (ferror (fp))
{
fprintf (stderr, "Could not write data to file %s.\n", TESTFILE);
exit (1);
}
fclose (fp);
}
{
/* Test an unaligned digest. */
char *digest = (char *) malloc (digest_size + 1) + 1;
const void *expected;
FILE *fp;
int ret;
switch (pass)
{
case 0: expected = expected_for_empty_file; break;
case 1: case 2: expected = expected_for_small_file; break;
case 3: case 4: expected = expected_for_large_file; break;
default: abort ();
}
fp = fopen (TESTFILE, "rb");
if (fp == NULL)
{
fprintf (stderr, "Could not open file %s.\n", TESTFILE);
exit (1);
}
switch (pass)
{
case 2:
case 4:
{
char header[4];
if (fread (header, 1, sizeof (header), fp) != sizeof (header))
{
fprintf (stderr, "Could not read the header of %s.\n",
TESTFILE);
exit (1);
}
}
break;
}
ret = streamfunc (fp, digest);
if (ret)
{
fprintf (stderr, "%s failed with error %d\n", streamfunc_name, -ret);
exit (1);
}
if (memcmp (digest, expected, digest_size) != 0)
{
size_t i;
fprintf (stderr, "%s produced wrong result.\n", streamfunc_name);
fprintf (stderr, "Expected: ");
for (i = 0; i < digest_size; i++)
fprintf (stderr, "\\x%02x", ((const unsigned char *) expected)[i]);
fprintf (stderr, "\n");
fprintf (stderr, "Got: ");
for (i = 0; i < digest_size; i++)
fprintf (stderr, "\\x%02x", ((const unsigned char *) digest)[i]);
fprintf (stderr, "\n");
exit (1);
}
/* Verify that fp is now positioned at end of file. */
if (getc (fp) != EOF)
{
fprintf (stderr, "%s left the stream not at EOF\n", streamfunc_name);
exit (1);
}
fclose (fp);
free (digest - 1);
}
}
unlink (TESTFILE);
}
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