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Add Base64 decoder. Not yet used but complements out encoder.

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This commit is contained in:
Werner Koch 2008-06-09 14:49:28 +00:00
parent b11af4cf50
commit 5a788b9e00
5 changed files with 330 additions and 3 deletions
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97
common/t-b64.c
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@ -65,13 +65,92 @@ test_b64enc_pgp (const char *string)
}
static void
test_b64enc_file (const char *fname)
{
gpg_error_t err;
struct b64state state;
FILE *fp;
char buffer[50];
size_t nread;
fp = fname ? fopen (fname, "r") : stdin;
if (!fp)
{
fprintf (stderr, "%s:%d: can't open `%s': %s\n",
__FILE__, __LINE__, fname? fname:"[stdin]", strerror (errno));
fail (0);
}
err = b64enc_start (&state, stdout, "DATA");
if (err)
fail (1);
while ( (nread = fread (buffer, 1, sizeof buffer, fp)) )
{
err = b64enc_write (&state, buffer, nread);
if (err)
fail (2);
}
err = b64enc_finish (&state);
if (err)
fail (3);
fclose (fp);
pass ();
}
static void
test_b64dec_file (const char *fname)
{
gpg_error_t err;
struct b64state state;
FILE *fp;
char buffer[50];
size_t nread, nbytes;
fp = fname ? fopen (fname, "r") : stdin;
if (!fp)
{
fprintf (stderr, "%s:%d: can't open `%s': %s\n",
__FILE__, __LINE__, fname? fname:"[stdin]", strerror (errno));
fail (0);
}
err = b64dec_start (&state, "");
if (err)
fail (1);
while ( (nread = fread (buffer, 1, sizeof buffer, fp)) )
{
err = b64dec_proc (&state, buffer, nread, &nbytes);
if (err)
{
if (gpg_err_code (err) == GPG_ERR_EOF)
break;
fail (2);
}
else if (nbytes)
fwrite (buffer, 1, nbytes, stdout);
}
err = b64dec_finish (&state);
if (err)
fail (3);
fclose (fp);
pass ();
}
int
main (int argc, char **argv)
{
int do_encode = 0;
int do_decode = 0;
if (argc)
{ argc--; argv++; }
if (argc && !strcmp (argv[0], "--verbose"))
@ -80,7 +159,23 @@ main (int argc, char **argv)
argc--; argv++;
}
test_b64enc_pgp (argc? *argv: NULL);
if (argc && !strcmp (argv[0], "--encode"))
{
do_encode = 1;
argc--; argv++;
}
else if (argc && !strcmp (argv[0], "--decode"))
{
do_decode = 1;
argc--; argv++;
}
if (do_encode)
test_b64enc_file (argc? *argv: NULL);
else if (do_decode)
test_b64dec_file (argc? *argv: NULL);
else
test_b64enc_pgp (argc? *argv: NULL);
return !!errcount;
}