/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
* Authors: Nathan Thompson-Amato <ndt@jps.net>
* Dan Winship <danw@helixcode.com>
* Jeffrey Stedfast <fejj@helixcode.com>
*
* Copyright (C) Helix Code, Inc. (www.helixcode.com)
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <gnome.h> /* for _() macro */
#include "openpgp-utils.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <dirent.h>
#include <signal.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <termios.h>
#include <unistd.h>
#include <signal.h>
#define d(x)
static const gchar *pgp_path = NULL;
static PgpType pgp_type = PGP_TYPE_NONE;
static PgpPasswdFunc pgp_passwd_func = NULL;
static gpointer pgp_data = NULL;
static gchar *
pgp_get_passphrase (const gchar *userid)
{
gchar *passphrase, *prompt, *type;
switch (pgp_type) {
case PGP_TYPE_GPG:
type = "GnuPG";
break;
case PGP_TYPE_PGP5:
type = "PGP5";
break;
case PGP_TYPE_PGP2:
type = "PGP2.x";
break;
default:
type = "";
}
if (userid)
prompt = g_strdup_printf (_("Please enter your %s passphrase for %s"),
type, userid);
else
prompt = g_strdup_printf (_("Please enter your %s passphrase"),
type);
passphrase = pgp_passwd_func (prompt, pgp_data);
g_free (prompt);
return passphrase;
}
/**
* openpgp_init:
* @path: path to pgp
* @type: pgp program type
* @callback: function to query for a passphrase
* @data: user data
*
* Initializes pgp variables
**/
void
openpgp_init (const gchar *path, PgpType type, PgpPasswdFunc callback, gpointer data)
{
pgp_path = path;
pgp_type = type;
pgp_passwd_func = callback;
pgp_data = data;
}
/**
* openpgp_detect:
* @text: input text
*
* Returns TRUE if it is found that the text contains a PGP encrypted
* block otherwise returns FALSE.
**/
gboolean
openpgp_detect (const gchar *text)
{
if (strstr (text, "-----BEGIN PGP MESSAGE-----"))
return TRUE;
return FALSE;
}
/**
* openpgp_sign_detect:
* @text: input text
*
* Returns TRUE if it is found that the text contains a PGP signed
* block otherwise returns FALSE.
**/
gboolean
openpgp_sign_detect (const gchar *text)
{
if (strstr (text, "-----BEGIN PGP SIGNED MESSAGE-----"))
return TRUE;
return FALSE;
}
static int
cleanup_child (pid_t child)
{
int status;
pid_t wait_result;
sigset_t mask, omask;
/* PGP5 closes fds before exiting, meaning this might be called
* too early. So wait a bit for the result.
*/
sigemptyset (&mask);
sigaddset (&mask, SIGALRM);
sigprocmask (SIG_BLOCK, &mask, &omask);
alarm (1);
wait_result = waitpid (child, &status, 0);
alarm (0);
sigprocmask (SIG_SETMASK, &omask, NULL);
if (wait_result == -1 && errno == EINTR) {
/* The child is hanging: send a friendly reminder. */
kill (child, SIGTERM);
sleep (1);
wait_result = waitpid (child, &status, WNOHANG);
if (wait_result == 0) {
/* Still hanging; use brute force. */
kill (child, SIGKILL);
sleep (1);
wait_result = waitpid (child, &status, WNOHANG);
}
}
if (wait_result != -1 && WIFEXITED (status))
return WEXITSTATUS (status);
else
return -1;
}
static void
cleanup_before_exec (int fd)
{
int maxfd, i;
maxfd = sysconf (_SC_OPEN_MAX);
if (maxfd < 0)
return;
/* Loop over all fds. */
for (i = 0; i < maxfd; i++) {
if ((STDIN_FILENO != i) &&
(STDOUT_FILENO != i) &&
(STDERR_FILENO != i) &&
(fd != i))
close (i);
}
}
static int
crypto_exec_with_passwd (const char *path, char *argv[], const char *input, int inlen,
int passwd_fds[], const char *passphrase,
char **output, int *outlen, char **diagnostics)
{
fd_set fdset, write_fdset;
int ip_fds[2], op_fds[2], diag_fds[2];
int select_result, read_len, write_len;
size_t tmp_len;
pid_t child;
char *buf, *diag_buf;
const char *passwd_next, *input_next;
size_t size, alloc_size, diag_size, diag_alloc_size;
gboolean eof_seen, diag_eof_seen, passwd_eof_seen, input_eof_seen;
size_t passwd_remaining, passwd_incr, input_remaining, input_incr;
struct timeval timeout;
if ((pipe (ip_fds) < 0 ) ||
(pipe (op_fds) < 0 ) ||
(pipe (diag_fds) < 0 )) {
*diagnostics = g_strdup_printf ("Couldn't create pipe to %s: "
"%s", pgp_path,
g_strerror (errno));
return 0;
}
if (!(child = fork ())) {
/* In child */
if ((dup2 (ip_fds[0], STDIN_FILENO) < 0 ) ||
(dup2 (op_fds[1], STDOUT_FILENO) < 0 ) ||
(dup2 (diag_fds[1], STDERR_FILENO) < 0 )) {
_exit (255);
}
/* Dissociate from evolution-mail's controlling
* terminal so that pgp/gpg won't be able to read from
* it: PGP 2 will fall back to asking for the password
* on /dev/tty if the passed-in password is incorrect.
* This will make that fail rather than hanging.
*/
setsid ();
/* Close excess fds */
cleanup_before_exec (passwd_fds[0]);
execvp (path, argv);
fprintf (stderr, "Could not execute %s: %s\n", argv[0],
g_strerror (errno));
_exit (255);
} else if (child < 0) {
*diagnostics = g_strdup_printf ("Cannot fork %s: %s",
argv[0], g_strerror (errno));
return 0;
}
/* Parent */
close (ip_fds[0]);
close (op_fds[1]);
close (diag_fds[1]);
close (passwd_fds[0]);
timeout.tv_sec = 10; /* timeout in seconds */
timeout.tv_usec = 0;
size = diag_size = 0;
alloc_size = 4096;
diag_alloc_size = 1024;
eof_seen = diag_eof_seen = FALSE;
buf = g_malloc (alloc_size);
diag_buf = g_malloc (diag_alloc_size);
passwd_next = passphrase;
passwd_remaining = passphrase ? strlen (passphrase) : 0;
passwd_incr = fpathconf (passwd_fds[1], _PC_PIPE_BUF);
/* Use a reasonable default value on error. */
if (passwd_incr <= 0)
passwd_incr = 1024;
passwd_eof_seen = FALSE;
input_next = input;
input_remaining = inlen;
input_incr = fpathconf (ip_fds[1], _PC_PIPE_BUF);
if (input_incr <= 0)
input_incr = 1024;
input_eof_seen = FALSE;
while (!(eof_seen && diag_eof_seen)) {
FD_ZERO (&fdset);
if (!eof_seen)
FD_SET (op_fds[0], &fdset);
if (!diag_eof_seen)
FD_SET (diag_fds[0], &fdset);
FD_ZERO (&write_fdset);
if (!passwd_eof_seen)
FD_SET (passwd_fds[1], &write_fdset);
if (!input_eof_seen)
FD_SET (ip_fds[1], &write_fdset);
select_result = select (FD_SETSIZE, &fdset, &write_fdset,
NULL, &timeout);
if (select_result < 0) {
if (errno == EINTR)
continue;
break;
}
if (select_result == 0) {
/* timeout */
break;
}
if (FD_ISSET (op_fds[0], &fdset)) {
/* More output is available. */
if (size + 4096 > alloc_size) {
alloc_size += 4096;
buf = g_realloc (buf , alloc_size);
}
read_len = read (op_fds[0], &buf[size],
alloc_size - size - 1);
if (read_len < 0) {
if (errno == EINTR)
continue;
break;
}
if (read_len == 0)
eof_seen = TRUE;
size += read_len;
}
if (FD_ISSET(diag_fds[0], &fdset) ) {
/* More stderr is available. */
if (diag_size + 1024 > diag_alloc_size) {
diag_alloc_size += 1024;
diag_buf = g_realloc (diag_buf,
diag_alloc_size);
}
read_len = read (diag_fds[0], &diag_buf[diag_size],
diag_alloc_size - diag_size - 1);
if (read_len < 0) {
if (errno == EINTR)
continue;
break;
}
if (read_len == 0)
diag_eof_seen = TRUE;
diag_size += read_len;
}
if (FD_ISSET(passwd_fds[1], &write_fdset)) {
/* Ready for more password input. */
tmp_len = passwd_incr;
if (tmp_len > passwd_remaining)
tmp_len = passwd_remaining;
write_len = write (passwd_fds[1], passwd_next,
tmp_len);
if (write_len < 0) {
if (errno == EINTR)
continue;
break;
}
passwd_next += write_len;
passwd_remaining -= write_len;
if (passwd_remaining == 0) {
close (passwd_fds[1]);
passwd_eof_seen = TRUE;
}
}
if (FD_ISSET(ip_fds[1], &write_fdset)) {
/* Ready for more ciphertext input. */
tmp_len = input_incr;
if (tmp_len > input_remaining)
tmp_len = input_remaining;
write_len = write (ip_fds[1], input_next, tmp_len);
if (write_len < 0) {
if (errno == EINTR)
continue;
break;
}
input_next += write_len;
input_remaining -= write_len;
if (input_remaining == 0 ) {
close (ip_fds[1]);
input_eof_seen = TRUE;
}
}
}
buf[size] = 0;
diag_buf[diag_size] = 0;
close (op_fds[0]);
close (diag_fds[0]);
*output = buf;
if (outlen)
*outlen = size;
*diagnostics = diag_buf;
return cleanup_child (child);
}
/*----------------------------------------------------------------------*
* Public crypto functions
*----------------------------------------------------------------------*/
/**
* openpgp_decrypt:
* @ciphertext: ciphertext to decrypt
* @cipherlen: ciphertext length
* @outlen: output length of the decrypted data (to be set by #openpgp_decrypt)
* @ex: exception
*
* Returns an allocated buffer containing the decrypted ciphertext. If
* the cleartext is plain text then you may treat it like a normal
* string as it will be NUL terminated, however #outlen is also set in
* the case that the cleartext is a binary stream.
**/
gchar *
openpgp_decrypt (const gchar *ciphertext, gint cipherlen, gint *outlen, CamelException *ex)
{
char *argv[15];
char *plaintext = NULL;
char *diagnostics = NULL;
char *passphrase;
int passwd_fds[2];
char passwd_fd[32];
int retval, i;
if (pgp_type == PGP_TYPE_NONE) {
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
_("No GPG/PGP program available."));
return NULL;
}
passphrase = pgp_get_passphrase (NULL);
if (!passphrase) {
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
_("No password provided."));
return NULL;
}
if (pipe (passwd_fds) < 0) {
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
_("Couldn't create pipe to GPG/PGP: %s"),
g_strerror (errno));
return NULL;
}
i = 0;
switch (pgp_type) {
case PGP_TYPE_GPG:
argv[i++] = "gpg";
argv[i++] = "--verbose";
argv[i++] = "--yes";
argv[i++] = "--batch";
argv[i++] = "--output";
argv[i++] = "-"; /* output to stdout */
argv[i++] = "--decrypt";
argv[i++] = "--passphrase-fd";
sprintf (passwd_fd, "%d", passwd_fds[0]);
argv[i++] = passwd_fd;
break;
case PGP_TYPE_PGP5:
argv[i++] = "pgpv";
argv[i++] = "-f";
argv[i++] = "+batchmode=1";
sprintf (passwd_fd, "PGPPASSFD=%d", passwd_fds[0]);
putenv (passwd_fd);
break;
case PGP_TYPE_PGP2:
argv[i++] = "pgp";
argv[i++] = "-f";
sprintf (passwd_fd, "PGPPASSFD=%d", passwd_fds[0]);
putenv (passwd_fd);
break;
default:
break;
}
argv[i++] = NULL;
retval = crypto_exec_with_passwd (pgp_path, argv,
ciphertext, cipherlen,
passwd_fds, passphrase,
&plaintext, outlen,
&diagnostics);
g_free (passphrase);
if (retval != 0 || !*plaintext) {
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
"%s", diagnostics);
g_free (plaintext);
g_free (diagnostics);
return NULL;
}
g_free (diagnostics);
return plaintext;
}
/**
* openpgp_encrypt:
* @in: data to encrypt
* @inlen: input length of input data
* @recipients: An array of recipient ids
* @sign: TRUE if you want to sign as well as encrypt
* @userid: userid to use when signing (assuming #sign is TRUE)
* @ex: exception
*
* Returns an allocated string containing the ciphertext.
**/
gchar *
openpgp_encrypt (const gchar *in, gint inlen, const GPtrArray *recipients,
gboolean sign, const gchar *userid, CamelException *ex)
{
GPtrArray *recipient_list = NULL;
GPtrArray *argv = NULL;
int retval, r;
char *ciphertext = NULL;
char *diagnostics = NULL;
int passwd_fds[2];
char passwd_fd[32];
char *passphrase = NULL;
if (pgp_type == PGP_TYPE_NONE) {
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
_("No GPG/PGP program available."));
return NULL;
}
if (sign) {
/* we only need a passphrase if we intend on signing */
passphrase = pgp_get_passphrase (NULL);
if (!passphrase) {
camel_exception_set (ex, CAMEL_EXCEPTION_SYSTEM,
_("No password provided."));
return NULL;
}
}
if (pipe (passwd_fds) < 0) {
g_free (passphrase);
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
_("Couldn't create pipe to GPG/PGP: %s"),
g_strerror (errno));
return NULL;
}
argv = g_ptr_array_new ();
switch (pgp_type) {
case PGP_TYPE_GPG:
if (recipients->len == 0) {
g_free (passphrase);
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
_("No recipients specified"));
return NULL;
}
recipient_list = g_ptr_array_new ();
for (r = 0; r < recipients->len; r++) {
char *buf, *recipient;
recipient = recipients->pdata[r];
buf = g_strdup_printf ("-r %s", recipient);
g_ptr_array_add (recipient_list, buf);
g_free (recipient);
}
g_ptr_array_add (argv, "gpg");
g_ptr_array_add (argv, "--verbose");
g_ptr_array_add (argv, "--yes");
g_ptr_array_add (argv, "--batch");
g_ptr_array_add (argv, "--armor");
for (r = 0; r < recipient_list->len; r++)
g_ptr_array_add (argv, recipient_list->pdata[r]);
g_ptr_array_add (argv, "--output");
g_ptr_array_add (argv, "-"); /* output to stdout */
g_ptr_array_add (argv, "--encrypt");
if (sign) {
g_ptr_array_add (argv, "--sign");
g_ptr_array_add (argv, "-u");
g_ptr_array_add (argv, (gchar *) userid);
g_ptr_array_add (argv, "--passphrase-fd");
sprintf (passwd_fd, "%d", passwd_fds[0]);
g_ptr_array_add (argv, passwd_fd);
}
break;
case PGP_TYPE_PGP5:
if (recipients->len == 0) {
g_free (passphrase);
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
_("No recipients specified"));
return NULL;
}
recipient_list = g_ptr_array_new ();
for (r = 0; r < recipients->len; r++) {
char *buf, *recipient;
recipient = recipients->pdata[r];
buf = g_strdup_printf ("-r %s", recipient);
g_ptr_array_add (recipient_list, buf);
g_free (recipient);
}
g_ptr_array_add (argv, "pgpe");
for (r = 0; r < recipient_list->len; r++)
g_ptr_array_add (argv, recipient_list->pdata[r]);
g_ptr_array_add (argv, "-f");
g_ptr_array_add (argv, "-z");
g_ptr_array_add (argv, "-a");
g_ptr_array_add (argv, "-o");
g_ptr_array_add (argv, "-"); /* output to stdout */
if (sign) {
g_ptr_array_add (argv, "-s");
g_ptr_array_add (argv, "-u");
g_ptr_array_add (argv, (gchar *) userid);
sprintf (passwd_fd, "PGPPASSFD=%d", passwd_fds[0]);
putenv (passwd_fd);
}
break;
case PGP_TYPE_PGP2:
if (recipients->len == 0) {
g_free (passphrase);
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
_("No recipients specified"));
return NULL;
}
recipient_list = g_ptr_array_new ();
for (r = 0; r < recipients->len; r++) {
char *buf, *recipient;
recipient = recipients->pdata[r];
buf = g_strdup (recipient);
g_ptr_array_add (recipient_list, buf);
g_free (recipient);
}
g_ptr_array_add (argv, "pgp");
g_ptr_array_add (argv, "-f");
g_ptr_array_add (argv, "-e");
g_ptr_array_add (argv, "-a");
g_ptr_array_add (argv, "-o");
g_ptr_array_add (argv, "-");
for (r = 0; r < recipient_list->len; r++)
g_ptr_array_add (argv, recipient_list->pdata[r]);
if (sign) {
g_ptr_array_add (argv, "-s");
g_ptr_array_add (argv, "-u");
g_ptr_array_add (argv, (gchar *) userid);
sprintf (passwd_fd, "PGPPASSFD=%d", passwd_fds[0]);
putenv (passwd_fd);
}
break;
default:
break;
}
g_ptr_array_add (argv, NULL);
retval = crypto_exec_with_passwd (pgp_path, (char **) argv->pdata,
in, inlen, passwd_fds,
passphrase, &ciphertext, NULL,
&diagnostics);
g_free (passphrase);
g_ptr_array_free (argv, TRUE);
if (retval != 0 || !*ciphertext) {
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
"%s", diagnostics);
g_free (ciphertext);
ciphertext = NULL;
}
if (recipient_list) {
for (r = 0; r < recipient_list->len; r++)
g_free (recipient_list->pdata[r]);
g_ptr_array_free (recipient_list, TRUE);
}
g_free (diagnostics);
return ciphertext;
}
/**
* openpgp_clearsign:
* @plaintext: plain readable text to clearsign
* @userid: userid to sign with
* @hash: Preferred hash function (md5 or sha1)
* @ex: exception
*
* Returns an allocated string containing the clearsigned plaintext
* using the preferred hash.
**/
gchar *
openpgp_clearsign (const gchar *plaintext, const gchar *userid,
PgpHashType hash, CamelException *ex)
{
char *argv[15];
char *ciphertext = NULL;
char *diagnostics = NULL;
char *passphrase = NULL;
char *hash_str = NULL;
int passwd_fds[2];
char passwd_fd[32];
int retval, i;
if (pgp_type == PGP_TYPE_NONE) {
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
_("No GPG/PGP program available."));
return NULL;
}
passphrase = pgp_get_passphrase (userid);
if (!passphrase) {
camel_exception_set (ex, CAMEL_EXCEPTION_SYSTEM,
_("No password provided."));
return NULL;
}
if (pipe (passwd_fds) < 0) {
g_free (passphrase);
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
_("Couldn't create pipe to GPG/PGP: %s"),
g_strerror (errno));
return NULL;
}
switch (hash) {
case PGP_HASH_TYPE_MD5:
hash_str = "MD5";
break;
case PGP_HASH_TYPE_SHA1:
hash_str = "SHA1";
break;
default:
break;
}
i = 0;
switch (pgp_type) {
case PGP_TYPE_GPG:
argv[i++] = "gpg";
argv[i++] = "--clearsign";
if (hash_str) {
argv[i++] = "--digest-algo";
argv[i++] = hash_str;
}
if (userid) {
argv[i++] = "-u";
argv[i++] = (char *) userid;
}
argv[i++] = "--verbose";
argv[i++] = "--yes";
argv[i++] = "--batch";
argv[i++] = "--armor";
argv[i++] = "--output";
argv[i++] = "-"; /* output to stdout */
argv[i++] = "--passphrase-fd";
sprintf (passwd_fd, "%d", passwd_fds[0]);
argv[i++] = passwd_fd;
break;
case PGP_TYPE_PGP5:
/* FIXME: modify to respect hash */
argv[i++] = "pgps";
if (userid) {
argv[i++] = "-u";
argv[i++] = (char *) userid;
}
argv[i++] = "-f";
argv[i++] = "-z";
argv[i++] = "-a";
argv[i++] = "-o";
argv[i++] = "-"; /* output to stdout */
sprintf (passwd_fd, "PGPPASSFD=%d", passwd_fds[0]);
putenv (passwd_fd);
break;
case PGP_TYPE_PGP2:
/* FIXME: modify to respect hash */
argv[i++] = "pgp";
if (userid) {
argv[i++] = "-u";
argv[i++] = (char *) userid;
}
argv[i++] = "-f";
argv[i++] = "-a";
argv[i++] = "-o";
argv[i++] = "-";
argv[i++] = "-st";
sprintf (passwd_fd, "PGPPASSFD=%d", passwd_fds[0]);
putenv (passwd_fd);
break;
default:
break;
}
argv[i++] = NULL;
retval = crypto_exec_with_passwd (pgp_path, argv,
plaintext, strlen (plaintext),
passwd_fds, passphrase,
&ciphertext, NULL,
&diagnostics);
g_free (passphrase);
if (retval != 0 || !*ciphertext) {
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
"%s", diagnostics);
g_free (ciphertext);
ciphertext = NULL;
}
g_free (diagnostics);
return ciphertext;
}
/**
* openpgp_sign:
* @in: input data to sign
* @inlen: length of input data
* @userid: userid to sign with
* @hash: preferred hash type (md5 or sha1)
* @ex: exception
*
* Returns an allocated string containing the detached signature using
* the preferred hash.
**/
gchar *
openpgp_sign (const gchar *in, gint inlen, const gchar *userid,
PgpHashType hash, CamelException *ex)
{
char *argv[20];
char *ciphertext = NULL;
char *diagnostics = NULL;
char *passphrase = NULL;
char *hash_str = NULL;
int passwd_fds[2];
char passwd_fd[32];
int retval, i;
if (pgp_type == PGP_TYPE_NONE) {
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
_("No GPG/PGP program available."));
return NULL;
}
passphrase = pgp_get_passphrase (userid);
if (!passphrase) {
camel_exception_set (ex, CAMEL_EXCEPTION_SYSTEM,
_("No password provided."));
return NULL;
}
if (pipe (passwd_fds) < 0) {
g_free (passphrase);
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
_("Couldn't create pipe to GPG/PGP: %s"),
g_strerror (errno));
return NULL;
}
switch (hash) {
case PGP_HASH_TYPE_MD5:
hash_str = "MD5";
break;
case PGP_HASH_TYPE_SHA1:
hash_str = "SHA1";
break;
default:
break;
}
i = 0;
switch (pgp_type) {
case PGP_TYPE_GPG:
argv[i++] = "gpg";
argv[i++] = "--sign";
argv[i++] = "-b";
if (hash_str) {
argv[i++] = "--digest-algo";
argv[i++] = hash_str;
}
if (userid) {
argv[i++] = "-u";
argv[i++] = (char *) userid;
}
argv[i++] = "--verbose";
argv[i++] = "--yes";
argv[i++] = "--batch";
argv[i++] = "--armor";
argv[i++] = "--output";
argv[i++] = "-"; /* output to stdout */
argv[i++] = "--passphrase-fd";
sprintf (passwd_fd, "%d", passwd_fds[0]);
argv[i++] = passwd_fd;
break;
case PGP_TYPE_PGP5:
/* FIXME: respect hash */
argv[i++] = "pgps";
if (userid) {
argv[i++] = "-u";
argv[i++] = (char *) userid;
}
argv[i++] = "-b";
argv[i++] = "-f";
argv[i++] = "-z";
argv[i++] = "-a";
argv[i++] = "-o";
argv[i++] = "-"; /* output to stdout */
sprintf (passwd_fd, "PGPPASSFD=%d", passwd_fds[0]);
putenv (passwd_fd);
break;
case PGP_TYPE_PGP2:
/* FIXME: respect hash */
argv[i++] = "pgp";
if (userid) {
argv[i++] = "-u";
argv[i++] = (char *) userid;
}
argv[i++] = "-f";
argv[i++] = "-a";
argv[i++] = "-o";
argv[i++] = "-";
argv[i++] = "-sb"; /* create a detached signature */
sprintf (passwd_fd, "PGPPASSFD=%d", passwd_fds[0]);
putenv (passwd_fd);
break;
default:
break;
}
argv[i++] = NULL;
retval = crypto_exec_with_passwd (pgp_path, argv,
in, inlen,
passwd_fds, passphrase,
&ciphertext, NULL,
&diagnostics);
g_free (passphrase);
if (retval != 0 || !*ciphertext) {
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
"%s", diagnostics);
g_free (ciphertext);
ciphertext = NULL;
}
g_free (diagnostics);
return ciphertext;
}
static char *
swrite (const char *data, int len)
{
char *template;
int fd;
template = g_strdup ("/tmp/gmime-crypto-XXXXXX");
fd = mkstemp (template);
if (fd == -1) {
g_free (template);
return NULL;
}
write (fd, data, len);
close (fd);
return template;
}
gboolean
openpgp_verify (const gchar *in, gint inlen, const gchar *sigin, gint siglen, CamelException *ex)
{
char *argv[20];
char *cleartext = NULL;
char *diagnostics = NULL;
int passwd_fds[2];
char passwd_fd[32];
char *sigfile = NULL;
int retval, i, clearlen;
gboolean valid = TRUE;
if (pgp_type == PGP_TYPE_NONE) {
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
_("No GPG/PGP program available."));
return FALSE;
}
if (pipe (passwd_fds) < 0) {
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
_("Couldn't create pipe to GPG/PGP: %s"),
g_strerror (errno));
return FALSE;
}
if (sigin != NULL && siglen) {
/* We are going to verify a detached signature so save
the signature to a temp file. */
sigfile = swrite (sigin, siglen);
if (!sigfile) {
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
_("Couldn't create temp file: %s"),
g_strerror (errno));
return FALSE;
}
}
i = 0;
switch (pgp_type) {
case PGP_TYPE_GPG:
argv[i++] = "gpg";
argv[i++] = "--verify";
if (sigin != NULL && siglen)
argv[i++] = sigfile;
argv[i++] = "-";
/*argv[i++] = "--verbose";*/
/*argv[i++] = "--yes";*/
/*argv[i++] = "--batch";*/
break;
case PGP_TYPE_PGP5:
argv[i++] = "pgpv";
argv[i++] = "-z";
if (sigin != NULL && siglen)
argv[i++] = sigfile;
argv[i++] = "-f";
break;
case PGP_TYPE_PGP2:
argv[i++] = "pgp";
if (sigin != NULL && siglen)
argv[i++] = sigfile;
argv[i++] = "-f";
break;
default:
break;
}
argv[i++] = NULL;
clearlen = 0;
retval = crypto_exec_with_passwd (pgp_path, argv,
in, inlen,
passwd_fds, NULL,
&cleartext, &clearlen,
&diagnostics);
/* cleanup */
if (sigfile) {
unlink (sigfile);
g_free (sigfile);
}
/* FIXME: maybe we should always set an exception? */
if (retval != 0) {
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
"%s", diagnostics);
valid = FALSE;
}
g_free (diagnostics);
g_free (cleartext);
return valid;
}
