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/* Fake pinentry program for the OpenPGP test suite.
*
* Copyright (C) 2016 g10 code GmbH
*
* This file is part of GnuPG.
*
* GnuPG 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.
*
* GnuPG 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 <http://www.gnu.org/licenses/>.
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
FILE *log_stream;
int
reply (const char *fmt, ...)
{
int result;
va_list ap;
if (log_stream)
{
fprintf (log_stream, "> ");
va_start (ap, fmt);
vfprintf (log_stream, fmt, ap);
va_end (ap);
}
va_start (ap, fmt);
result = vprintf (fmt, ap);
va_end (ap);
return result;
}
#define spacep(p) (*(p) == ' ' || *(p) == '\t')
/* Skip over options in LINE.
Blanks after the options are also removed. Options are indicated
by two leading dashes followed by a string consisting of non-space
characters. The special option "--" indicates an explicit end of
options; all what follows will not be considered an option. The
first no-option string also indicates the end of option parsing. */
char *
skip_options (const char *line)
{
while (spacep (line))
line++;
while (*line == '-' && line[1] == '-')
{
while (*line && !spacep (line))
line++;
while (spacep (line))
line++;
}
return (char*) line;
}
/* Return a pointer to the argument of the option with NAME. If such
an option is not given, NULL is returned. */
char *
option_value (const char *line, const char *name)
{
char *s;
int n = strlen (name);
s = strstr (line, name);
if (s && s >= skip_options (line))
return NULL;
if (s && (s == line || spacep (s-1))
&& s[n] && (spacep (s+n) || s[n] == '='))
{
s += n + 1;
s += strspn (s, " ");
if (*s && !spacep(s))
return s;
}
return NULL;
}
int
main (int argc, char **argv)
{
char *args;
char *logfile;
static char *passphrase;
/* We get our options via PINENTRY_USER_DATA. */
(void) argc, (void) argv;
setvbuf (stdin, NULL, _IOLBF, BUFSIZ);
setvbuf (stdout, NULL, _IOLBF, BUFSIZ);
args = getenv ("PINENTRY_USER_DATA");
if (! args)
args = "";
logfile = option_value (args, "--logfile");
if (logfile)
{
char *p = logfile, more;
while (*p && ! spacep (p))
p++;
more = !! *p;
*p = 0;
args = more ? p+1 : p;
log_stream = fopen (logfile, "a");
if (! log_stream)
{
perror (logfile);
return 1;
}
}
passphrase = skip_options (args);
reply ("# fake-pinentry started. Passphrase='%s'.\n", passphrase);
reply ("OK - what's up?\n");
while (! feof (stdin))
{
char buffer[1024];
if (fgets (buffer, sizeof buffer, stdin) == NULL)
break;
if (log_stream)
fprintf (log_stream, "< %s", buffer);
if (strncmp (buffer, "GETPIN", 6) == 0)
reply ("D %s\n", passphrase);
else if (strncmp (buffer, "BYE", 3) == 0)
{
reply ("OK\n");
break;
}
reply ("OK\n");
}
reply ("# Connection terminated.\n");
if (log_stream)
fclose (log_stream);
return 0;
}
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