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/*
* Copyright (C) 2001,2002 Oliver Ehli <elmy@acm.org>
* Copyright (C) 2002 Mike Schiraldi <raldi@research.netsol.com>
* Copyright (C) 2004 g10 Code GmbH
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#if HAVE_CONFIG_H
# include "config.h"
#endif
#include "mutt.h"
#include "mutt_curses.h"
#include "mutt_menu.h"
#include "smime.h"
#include "mime.h"
#include "copy.h"
#include <sys/wait.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/stat.h>
#include <errno.h>
#include <ctype.h>
#ifdef HAVE_LOCALE_H
#include <locale.h>
#endif
#ifdef HAVE_SYS_TIME_H
# include <sys/time.h>
#endif
#ifdef HAVE_SYS_RESOURCE_H
# include <sys/resource.h>
#endif
#ifdef CRYPT_BACKEND_CLASSIC_SMIME
#include "mutt_crypt.h"
struct smime_command_context {
const char *key; /* %k */
const char *cryptalg; /* %a */
const char *fname; /* %f */
const char *sig_fname; /* %s */
const char *certificates; /* %c */
const char *intermediates; /* %i */
};
typedef struct {
unsigned int hash;
char suffix;
char email[256];
char nick[256];
char trust; /* i=Invalid r=revoked e=expired u=unverified v=verified t=trusted */
short public; /* 1=public 0=private */
} smime_id;
char SmimePass[STRING];
time_t SmimeExptime = 0; /* when does the cached passphrase expire? */
static char SmimeKeyToUse[_POSIX_PATH_MAX] = { 0 };
static char SmimeCertToUse[_POSIX_PATH_MAX];
static char SmimeIntermediateToUse[_POSIX_PATH_MAX];
/*
* Queries and passphrase handling.
*/
/* these are copies from pgp.c */
void smime_void_passphrase (void)
{
memset (SmimePass, 0, sizeof (SmimePass));
SmimeExptime = 0;
}
int smime_valid_passphrase (void)
{
time_t now = time (NULL);
if (now < SmimeExptime)
/* Use cached copy. */
return 1;
smime_void_passphrase();
if (mutt_get_password (_("Enter S/MIME passphrase:"), SmimePass, sizeof (SmimePass)) == 0)
{
SmimeExptime = time (NULL) + SmimeTimeout;
return (1);
}
else
SmimeExptime = 0;
return 0;
}
/*
* The OpenSSL interface
*/
/* This is almost identical to ppgp's invoking interface. */
static const char *_mutt_fmt_smime_command (char *dest,
size_t destlen,
size_t col,
char op,
const char *src,
const char *prefix,
const char *ifstring,
const char *elsestring,
unsigned long data,
format_flag flags)
{
char fmt[16];
struct smime_command_context *cctx = (struct smime_command_context *) data;
int optional = (flags & M_FORMAT_OPTIONAL);
switch (op)
{
case 'C':
{
if (!optional)
{
char path[_POSIX_PATH_MAX];
char buf1[LONG_STRING], buf2[LONG_STRING];
struct stat sb;
strfcpy (path, NONULL (SmimeCALocation), sizeof (path));
mutt_expand_path (path, sizeof (path));
mutt_quote_filename (buf1, sizeof (buf1), path);
if (stat (path, &sb) != 0 || !S_ISDIR (sb.st_mode))
snprintf (buf2, sizeof (buf2), "-CAfile %s", buf1);
else
snprintf (buf2, sizeof (buf2), "-CApath %s", buf1);
snprintf (fmt, sizeof (fmt), "%%%ss", prefix);
snprintf (dest, destlen, fmt, buf2);
}
else if (!SmimeCALocation)
optional = 0;
break;
}
case 'c':
{ /* certificate (list) */
if (!optional) {
snprintf (fmt, sizeof (fmt), "%%%ss", prefix);
snprintf (dest, destlen, fmt, NONULL(cctx->certificates));
}
else if (!cctx->certificates)
optional = 0;
break;
}
case 'i':
{ /* intermediate certificates */
if (!optional) {
snprintf (fmt, sizeof (fmt), "%%%ss", prefix);
snprintf (dest, destlen, fmt, NONULL(cctx->intermediates));
}
else if (!cctx->intermediates)
optional = 0;
break;
}
case 's':
{ /* detached signature */
if (!optional)
{
snprintf (fmt, sizeof (fmt), "%%%ss", prefix);
snprintf (dest, destlen, fmt, NONULL (cctx->sig_fname));
}
else if (!cctx->sig_fname)
optional = 0;
break;
}
case 'k':
{ /* private key */
if (!optional)
{
snprintf (fmt, sizeof (fmt), "%%%ss", prefix);
snprintf (dest, destlen, fmt, NONULL (cctx->key));
}
else if (!cctx->key)
optional = 0;
break;
}
case 'a':
{ /* algorithm for encryption */
if (!optional) {
snprintf (fmt, sizeof (fmt), "%%%ss", prefix);
snprintf (dest, destlen, fmt, NONULL (cctx->cryptalg));
}
else if (!cctx->key)
optional = 0;
break;
}
case 'f':
{ /* file to process */
if (!optional)
{
snprintf (fmt, sizeof (fmt), "%%%ss", prefix);
snprintf (dest, destlen, fmt, NONULL (cctx->fname));
}
else if (!cctx->fname)
optional = 0;
break;
}
default:
*dest = '\0';
break;
}
if (optional)
mutt_FormatString (dest, destlen, col, ifstring, _mutt_fmt_smime_command,
data, 0);
else if (flags & M_FORMAT_OPTIONAL)
mutt_FormatString (dest, destlen, col, elsestring, _mutt_fmt_smime_command,
data, 0);
return (src);
}
static void mutt_smime_command (char *d, size_t dlen,
struct smime_command_context *cctx, const char *fmt)
{
mutt_FormatString (d, dlen, 0, NONULL(fmt), _mutt_fmt_smime_command,
(unsigned long) cctx, 0);
dprint (2,(debugfile, "mutt_smime_command: %s\n", d));
}
static pid_t smime_invoke (FILE **smimein, FILE **smimeout, FILE **smimeerr,
int smimeinfd, int smimeoutfd, int smimeerrfd,
const char *fname,
const char *sig_fname,
const char *cryptalg,
const char *key,
const char *certificates,
const char *intermediates,
const char *format)
{
struct smime_command_context cctx;
char cmd[HUGE_STRING];
memset (&cctx, 0, sizeof (cctx));
if (!format || !*format)
return (pid_t) -1;
cctx.fname = fname;
cctx.sig_fname = sig_fname;
cctx.key = key;
cctx.cryptalg = cryptalg;
cctx.certificates = certificates;
cctx.intermediates = intermediates;
mutt_smime_command (cmd, sizeof (cmd), &cctx, format);
return mutt_create_filter_fd (cmd, smimein, smimeout, smimeerr,
smimeinfd, smimeoutfd, smimeerrfd);
}
/*
* Key and certificate handling.
*/
/*
Search the certificate index for given mailbox.
return certificate file name.
*/
static void smime_entry (char *s, size_t l, MUTTMENU * menu, int num)
{
smime_id *Table = (smime_id*) menu->data;
smime_id this = Table[num];
char* truststate;
switch(this.trust) {
case 't':
truststate = N_("Trusted ");
break;
case 'v':
truststate = N_("Verified ");
break;
case 'u':
truststate = N_("Unverified");
break;
case 'e':
truststate = N_("Expired ");
break;
case 'r':
truststate = N_("Revoked ");
break;
case 'i':
truststate = N_("Invalid ");
break;
default:
truststate = N_("Unknown ");
}
if (this.public)
snprintf(s, l, " 0x%.8X.%i %s %-35.35s %s", this.hash, this.suffix, truststate, this.email, this.nick);
else
snprintf(s, l, " 0x%.8X.%i %-35.35s %s", this.hash, this.suffix, this.email, this.nick);
}
char* smime_ask_for_key (char *prompt, char *mailbox, short public)
{
char *fname;
smime_id *table = 0;
int table_count;
char index_file[_POSIX_PATH_MAX];
FILE *index;
char buf[LONG_STRING];
char fields[5][STRING];
int numFields, hash_suffix, done, cur; /* The current entry */
MUTTMENU* menu;
unsigned int hash;
char helpstr[HUGE_STRING*3];
char qry[256];
char title[256];
if (!prompt) prompt = _("Enter keyID: ");
snprintf(index_file, sizeof (index_file), "%s/.index",
public ? NONULL(SmimeCertificates) : NONULL(SmimeKeys));
FOREVER
{
*qry = 0;
if (mutt_get_field(prompt,
qry, sizeof(qry), 0))
return NULL;
snprintf(title, sizeof(title), _("S/MIME certificates matching \"%s\"."),
qry);
index = fopen(index_file, "r");
if (index == NULL)
{
mutt_perror (index_file);
return NULL;
}
/* Read Entries */
cur = 0;
table_count = 0;
while (!feof(index)) {
numFields = fscanf (index, MUTT_FORMAT(STRING) " %x.%i " MUTT_FORMAT(STRING), fields[0], &hash,
&hash_suffix, fields[2]);
if (public)
fscanf (index, MUTT_FORMAT(STRING) " " MUTT_FORMAT(STRING) "\n", fields[3], fields[4]);
/* 0=email 1=name 2=nick 3=intermediate 4=trust */
if (numFields < 2) continue;
/* Check if query matches this certificate */
if (!mutt_stristr(fields[0], qry) &&
!mutt_stristr(fields[2], qry))
continue;
++table_count;
safe_realloc(&table, sizeof(smime_id) * table_count);
table[cur].hash = hash;
table[cur].suffix = hash_suffix;
strncpy(table[cur].email, fields[0], sizeof(table[cur].email));
strncpy(table[cur].nick, fields[2], sizeof(table[cur].nick));
table[cur].trust = *fields[4];
table[cur].public = public;
cur++;
}
safe_fclose (&index);
/* Make Helpstring */
helpstr[0] = 0;
mutt_make_help (buf, sizeof (buf), _("Exit "), MENU_SMIME, OP_EXIT);
strcat (helpstr, buf); /* __STRCAT_CHECKED__ */
mutt_make_help (buf, sizeof (buf), _("Select "), MENU_SMIME,
OP_GENERIC_SELECT_ENTRY);
strcat (helpstr, buf); /* __STRCAT_CHECKED__ */
mutt_make_help (buf, sizeof(buf), _("Help"), MENU_SMIME, OP_HELP);
strcat (helpstr, buf); /* __STRCAT_CHECKED__ */
/* Create the menu */
menu = mutt_new_menu(MENU_SMIME);
menu->max = cur;
menu->make_entry = smime_entry;
menu->help = helpstr;
menu->data = table;
menu->title = title;
/* sorting keys might be done later - TODO */
mutt_clear_error();
done = 0;
hash = 0;
while (!done) {
switch (mutt_menuLoop (menu)) {
case OP_GENERIC_SELECT_ENTRY:
cur = menu->current;
hash = 1;
done = 1;
break;
case OP_EXIT:
hash = 0;
done = 1;
break;
}
}
if (table_count && hash)
safe_asprintf(&fname, "%.8x.%i", table[cur].hash, table[cur].suffix);
else fname = NULL;
mutt_menuDestroy (&menu);
FREE (&table);
set_option (OPTNEEDREDRAW);
if (fname) return fname;
}
}
char *smime_get_field_from_db (char *mailbox, char *query, short public, short may_ask)
{
int addr_len, query_len, found = 0, ask = 0, choice = 0;
char cert_path[_POSIX_PATH_MAX];
char buf[LONG_STRING], prompt[STRING];
char fields[5][STRING];
char key[STRING];
int numFields;
struct stat info;
char key_trust_level = 0;
FILE *fp;
if(!mailbox && !query) return(NULL);
addr_len = mailbox ? mutt_strlen (mailbox) : 0;
query_len = query ? mutt_strlen (query) : 0;
*key = '\0';
/* index-file format:
mailbox certfile label issuer_certfile trust_flags\n
certfile is a hash value generated by openssl.
Note that this was done according to the OpenSSL
specs on their CA-directory.
*/
snprintf (cert_path, sizeof (cert_path), "%s/.index",
(public ? NONULL(SmimeCertificates) : NONULL(SmimeKeys)));
if (!stat (cert_path, &info))
{
if ((fp = safe_fopen (cert_path, "r")) == NULL)
{
mutt_perror (cert_path);
return (NULL);
}
while (fgets (buf, sizeof (buf) - 1, fp) != NULL)
if (mailbox && !(mutt_strncasecmp (mailbox, buf, addr_len)))
{
numFields = sscanf (buf,
MUTT_FORMAT(STRING) " " MUTT_FORMAT(STRING) " "
MUTT_FORMAT(STRING) " " MUTT_FORMAT(STRING) " "
MUTT_FORMAT(STRING) "\n",
fields[0], fields[1],
fields[2], fields[3],
fields[4]);
if (numFields < 2)
continue;
if (mailbox && public &&
(*fields[4] == 'i' || *fields[4] == 'e' || *fields[4] == 'r'))
continue;
if (found)
{
if (public && *fields[4] == 'u' )
snprintf (prompt, sizeof (prompt),
_("ID %s is unverified. Do you want to use it for %s ?"),
fields[1], mailbox);
else if (public && *fields[4] == 'v' )
snprintf (prompt, sizeof (prompt),
_("Use (untrusted!) ID %s for %s ?"),
fields[1], mailbox);
else
snprintf (prompt, sizeof (prompt), _("Use ID %s for %s ?"),
fields[1], mailbox);
if (may_ask == 0)
choice = M_YES;
if (may_ask && (choice = mutt_yesorno (prompt, M_NO)) == -1)
{
found = 0;
ask = 0;
*key = '\0';
break;
}
else if (choice == M_NO)
{
ask = 1;
continue;
}
else if (choice == M_YES)
{
strfcpy (key, fields[1], sizeof (key));
ask = 0;
break;
}
}
else
{
if (public)
key_trust_level = *fields[4];
strfcpy (key, fields[1], sizeof (key));
}
found = 1;
}
else if(query)
{
numFields = sscanf (buf,
MUTT_FORMAT(STRING) " " MUTT_FORMAT(STRING) " "
MUTT_FORMAT(STRING) " " MUTT_FORMAT(STRING) " "
MUTT_FORMAT(STRING) "\n",
fields[0], fields[1],
fields[2], fields[3],
fields[4]);
/* query = label: return certificate. */
if (numFields >= 3 &&
!(mutt_strncasecmp (query, fields[2], query_len)))
{
ask = 0;
strfcpy (key, fields[1], sizeof (key));
}
/* query = certificate: return intermediate certificate. */
else if (numFields >= 4 &&
!(mutt_strncasecmp (query, fields[1], query_len)))
{
ask = 0;
strfcpy (key, fields[3], sizeof (key));
}
}
safe_fclose (&fp);
if (ask)
{
if (public && *fields[4] == 'u' )
snprintf (prompt, sizeof (prompt),
_("ID %s is unverified. Do you want to use it for %s ?"),
fields[1], mailbox);
else if (public && *fields[4] == 'v' )
snprintf (prompt, sizeof (prompt),
_("Use (untrusted!) ID %s for %s ?"),
fields[1], mailbox);
else
snprintf (prompt, sizeof(prompt), _("Use ID %s for %s ?"), key,
mailbox);
choice = mutt_yesorno (prompt, M_NO);
if (choice == -1 || choice == M_NO)
*key = '\0';
}
else if (key_trust_level && may_ask)
{
if (key_trust_level == 'u' )
{
snprintf (prompt, sizeof (prompt),
_("ID %s is unverified. Do you want to use it for %s ?"),
key, mailbox);
choice = mutt_yesorno (prompt, M_NO);
if (choice != M_YES)
*key = '\0';
}
else if (key_trust_level == 'v' )
{
mutt_error (_("Warning: You have not yet decided to trust ID %s. (any key to continue)"), key);
mutt_sleep (5);
}
}
}
/* Note: safe_strdup ("") returns NULL. */
return safe_strdup (key);
}
/*
This sets the '*ToUse' variables for an upcoming decryption, where
the reuquired key is different from SmimeDefaultKey.
*/
void _smime_getkeys (char *mailbox)
{
char *k = NULL;
char buf[STRING];
k = smime_get_field_from_db (mailbox, NULL, 0, 1);
if (!k)
{
snprintf(buf, sizeof(buf), _("Enter keyID for %s: "),
mailbox);
k = smime_ask_for_key(buf, mailbox, 0);
}
if (k)
{
/* the key used last time. */
if (*SmimeKeyToUse &&
!mutt_strcasecmp (k, SmimeKeyToUse + mutt_strlen (SmimeKeys)+1))
{
FREE (&k);
return;
}
else smime_void_passphrase ();
snprintf (SmimeKeyToUse, sizeof (SmimeKeyToUse), "%s/%s",
NONULL(SmimeKeys), k);
snprintf (SmimeCertToUse, sizeof (SmimeCertToUse), "%s/%s",
NONULL(SmimeCertificates), k);
if (mutt_strcasecmp (k, SmimeDefaultKey))
smime_void_passphrase ();
FREE (&k);
return;
}
if (*SmimeKeyToUse)
{
if (!mutt_strcasecmp (SmimeDefaultKey,
SmimeKeyToUse + mutt_strlen (SmimeKeys)+1))
return;
smime_void_passphrase ();
}
snprintf (SmimeKeyToUse, sizeof (SmimeKeyToUse), "%s/%s",
NONULL (SmimeKeys), NONULL (SmimeDefaultKey));
snprintf (SmimeCertToUse, sizeof (SmimeCertToUse), "%s/%s",
NONULL (SmimeCertificates), NONULL (SmimeDefaultKey));
}
void smime_getkeys (ENVELOPE *env)
{
ADDRESS *t;
int found = 0;
if (option (OPTSDEFAULTDECRYPTKEY) && SmimeDefaultKey && *SmimeDefaultKey)
{
snprintf (SmimeKeyToUse, sizeof (SmimeKeyToUse), "%s/%s",
NONULL (SmimeKeys), SmimeDefaultKey);
snprintf (SmimeCertToUse, sizeof (SmimeCertToUse), "%s/%s",
NONULL(SmimeCertificates), SmimeDefaultKey);
return;
}
for (t = env->to; !found && t; t = t->next)
if (mutt_addr_is_user (t))
{
found = 1;
_smime_getkeys (t->mailbox);
}
for (t = env->cc; !found && t; t = t->next)
if (mutt_addr_is_user (t))
{
found = 1;
_smime_getkeys (t->mailbox);
}
if (!found && (t = mutt_default_from()))
{
_smime_getkeys (t->mailbox);
rfc822_free_address (&t);
}
}
/* This routine attempts to find the keyids of the recipients of a message.
* It returns NULL if any of the keys can not be found.
*/
char *smime_findKeys (ADDRESS *to, ADDRESS *cc, ADDRESS *bcc)
{
char *keyID, *keylist = NULL;
size_t keylist_size = 0;
size_t keylist_used = 0;
ADDRESS *tmp = NULL, *addr = NULL;
ADDRESS **last = &tmp;
ADDRESS *p, *q;
int i;
const char *fqdn = mutt_fqdn (1);
for (i = 0; i < 3; i++)
{
switch (i)
{
case 0: p = to; break;
case 1: p = cc; break;
case 2: p = bcc; break;
default: abort ();
}
*last = rfc822_cpy_adr (p, 0);
while (*last)
last = &((*last)->next);
}
if (fqdn)
rfc822_qualify (tmp, fqdn);
tmp = mutt_remove_duplicates (tmp);
for (p = tmp; p ; p = p->next)
{
char buf[LONG_STRING];
q = p;
if ((keyID = smime_get_field_from_db (q->mailbox, NULL, 1, 1)) == NULL)
{
snprintf(buf, sizeof(buf),
_("Enter keyID for %s: "),
q->mailbox);
keyID = smime_ask_for_key(buf, q->mailbox, 1);
}
if(!keyID)
{
mutt_message (_("No (valid) certificate found for %s."), q->mailbox);
FREE (&keylist);
rfc822_free_address (&tmp);
rfc822_free_address (&addr);
return NULL;
}
keylist_size += mutt_strlen (keyID) + 2;
safe_realloc (&keylist, keylist_size);
sprintf (keylist + keylist_used, "%s\n", keyID); /* __SPRINTF_CHECKED__ */
keylist_used = mutt_strlen (keylist);
rfc822_free_address (&addr);
}
rfc822_free_address (&tmp);
return (keylist);
}
static int smime_handle_cert_email (char *certificate, char *mailbox,
int copy, char ***buffer, int *num)
{
FILE *fpout = NULL, *fperr = NULL;
char tmpfname[_POSIX_PATH_MAX];
char email[STRING];
int ret = -1, count = 0;
pid_t thepid;
mutt_mktemp (tmpfname, sizeof (tmpfname));
if ((fperr = safe_fopen (tmpfname, "w+")) == NULL)
{
mutt_perror (tmpfname);
return 1;
}
mutt_unlink (tmpfname);
mutt_mktemp (tmpfname, sizeof (tmpfname));
if ((fpout = safe_fopen (tmpfname, "w+")) == NULL)
{
safe_fclose (&fperr);
mutt_perror (tmpfname);
return 1;
}
mutt_unlink (tmpfname);
if ((thepid = smime_invoke (NULL, NULL, NULL,
-1, fileno (fpout), fileno (fperr),
certificate, NULL, NULL, NULL, NULL, NULL,
SmimeGetCertEmailCommand))== -1)
{
mutt_message (_("Error: unable to create OpenSSL subprocess!"));
safe_fclose (&fperr);
safe_fclose (&fpout);
return 1;
}
mutt_wait_filter (thepid);
fflush (fpout);
rewind (fpout);
fflush (fperr);
rewind (fperr);
while ((fgets (email, sizeof (email), fpout)))
{
*(email + mutt_strlen (email)-1) = '\0';
if(mutt_strncasecmp (email, mailbox, mutt_strlen (mailbox)) == 0)
ret=1;
ret = ret < 0 ? 0 : ret;
count++;
}
if (ret == -1)
{
mutt_endwin(NULL);
mutt_copy_stream (fperr, stdout);
mutt_any_key_to_continue (_("Error: unable to create OpenSSL subprocess!"));
ret = 1;
}
else if (!ret)
ret = 1;
else ret = 0;
if(copy && buffer && num)
{
(*num) = count;
*buffer = safe_calloc(sizeof(char*), count);
count = 0;
rewind (fpout);
while ((fgets (email, sizeof (email), fpout)))
{
*(email + mutt_strlen (email) - 1) = '\0';
(*buffer)[count] = safe_calloc(1, mutt_strlen (email) + 1);
strncpy((*buffer)[count], email, mutt_strlen (email));
count++;
}
}
else if(copy) ret = 2;
safe_fclose (&fpout);
safe_fclose (&fperr);
return ret;
}
static char *smime_extract_certificate (char *infile)
{
FILE *fpout = NULL, *fperr = NULL;
char pk7out[_POSIX_PATH_MAX], certfile[_POSIX_PATH_MAX];
char tmpfname[_POSIX_PATH_MAX];
pid_t thepid;
int empty;
mutt_mktemp (tmpfname, sizeof (tmpfname));
if ((fperr = safe_fopen (tmpfname, "w+")) == NULL)
{
mutt_perror (tmpfname);
return NULL;
}
mutt_unlink (tmpfname);
mutt_mktemp (pk7out, sizeof (pk7out));
if ((fpout = safe_fopen (pk7out, "w+")) == NULL)
{
safe_fclose (&fperr);
mutt_perror (pk7out);
return NULL;
}
/* Step 1: Convert the signature to a PKCS#7 structure, as we can't
extract the full set of certificates directly.
*/
if ((thepid = smime_invoke (NULL, NULL, NULL,
-1, fileno (fpout), fileno (fperr),
infile, NULL, NULL, NULL, NULL, NULL,
SmimePk7outCommand))== -1)
{
mutt_any_key_to_continue (_("Error: unable to create OpenSSL subprocess!"));
safe_fclose (&fperr);
safe_fclose (&fpout);
mutt_unlink (pk7out);
return NULL;
}
mutt_wait_filter (thepid);
fflush (fpout);
rewind (fpout);
fflush (fperr);
rewind (fperr);
empty = (fgetc (fpout) == EOF);
if (empty)
{
mutt_perror (pk7out);
mutt_copy_stream (fperr, stdout);
safe_fclose (&fpout);
safe_fclose (&fperr);
mutt_unlink (pk7out);
return NULL;
}
safe_fclose (&fpout);
mutt_mktemp (certfile, sizeof (certfile));
if ((fpout = safe_fopen (certfile, "w+")) == NULL)
{
safe_fclose (&fperr);
mutt_unlink (pk7out);
mutt_perror (certfile);
return NULL;
}
/* Step 2: Extract the certificates from a PKCS#7 structure.
*/
if ((thepid = smime_invoke (NULL, NULL, NULL,
-1, fileno (fpout), fileno (fperr),
pk7out, NULL, NULL, NULL, NULL, NULL,
SmimeGetCertCommand))== -1)
{
mutt_any_key_to_continue (_("Error: unable to create OpenSSL subprocess!"));
safe_fclose (&fperr);
safe_fclose (&fpout);
mutt_unlink (pk7out);
mutt_unlink (certfile);
return NULL;
}
mutt_wait_filter (thepid);
mutt_unlink (pk7out);
fflush (fpout);
rewind (fpout);
fflush (fperr);
rewind (fperr);
empty = (fgetc (fpout) == EOF);
if (empty)
{
mutt_copy_stream (fperr, stdout);
safe_fclose (&fpout);
safe_fclose (&fperr);
mutt_unlink (certfile);
return NULL;
}
safe_fclose (&fpout);
safe_fclose (&fperr);
return safe_strdup (certfile);
}
static char *smime_extract_signer_certificate (char *infile)
{
FILE *fpout = NULL, *fperr = NULL;
char pk7out[_POSIX_PATH_MAX], certfile[_POSIX_PATH_MAX];
char tmpfname[_POSIX_PATH_MAX];
pid_t thepid;
int empty;
mutt_mktemp (tmpfname, sizeof (tmpfname));
if ((fperr = safe_fopen (tmpfname, "w+")) == NULL)
{
mutt_perror (tmpfname);
return NULL;
}
mutt_unlink (tmpfname);
mutt_mktemp (certfile, sizeof (certfile));
if ((fpout = safe_fopen (certfile, "w+")) == NULL)
{
safe_fclose (&fperr);
mutt_perror (certfile);
return NULL;
}
/* Extract signer's certificate
*/
if ((thepid = smime_invoke (NULL, NULL, NULL,
-1, -1, fileno (fperr),
infile, NULL, NULL, NULL, certfile, NULL,
SmimeGetSignerCertCommand))== -1)
{
mutt_any_key_to_continue (_("Error: unable to create OpenSSL subprocess!"));
safe_fclose (&fperr);
safe_fclose (&fpout);
mutt_unlink (pk7out);
mutt_unlink (certfile);
return NULL;
}
mutt_wait_filter (thepid);
fflush (fpout);
rewind (fpout);
fflush (fperr);
rewind (fperr);
empty = (fgetc (fpout) == EOF);
if (empty)
{
mutt_endwin (NULL);
mutt_copy_stream (fperr, stdout);
mutt_any_key_to_continue (NULL);
safe_fclose (&fpout);
safe_fclose (&fperr);
mutt_unlink (certfile);
return NULL;
}
safe_fclose (&fpout);
safe_fclose (&fperr);
return safe_strdup (certfile);
}
/* Add a certificate and update index file (externally). */
void smime_invoke_import (char *infile, char *mailbox)
{
char tmpfname[_POSIX_PATH_MAX], *certfile = NULL, buf[STRING];
FILE *smimein=NULL, *fpout = NULL, *fperr = NULL;
pid_t thepid=-1;
mutt_mktemp (tmpfname, sizeof (tmpfname));
if ((fperr = safe_fopen (tmpfname, "w+")) == NULL)
{
mutt_perror (tmpfname);
return;
}
mutt_unlink (tmpfname);
mutt_mktemp (tmpfname, sizeof (tmpfname));
if ((fpout = safe_fopen (tmpfname, "w+")) == NULL)
{
safe_fclose (&fperr);
mutt_perror (tmpfname);
return;
}
mutt_unlink (tmpfname);
buf[0] = '\0';
if (option (OPTASKCERTLABEL))
mutt_get_field ("Label for certificate:", buf, sizeof (buf), 0);
mutt_endwin (NULL);
if ((certfile = smime_extract_certificate(infile)))
{
mutt_endwin (NULL);
if ((thepid = smime_invoke (&smimein, NULL, NULL,
-1, fileno(fpout), fileno(fperr),
certfile, NULL, NULL, NULL, NULL, NULL,
SmimeImportCertCommand))== -1)
{
mutt_message (_("Error: unable to create OpenSSL subprocess!"));
return;
}
fputs (buf, smimein);
fputc ('\n', smimein);
safe_fclose (&smimein);
mutt_wait_filter (thepid);
mutt_unlink (certfile);
FREE (&certfile);
}
fflush (fpout);
rewind (fpout);
fflush (fperr);
rewind (fperr);
mutt_copy_stream (fpout, stdout);
mutt_copy_stream (fperr, stdout);
safe_fclose (&fpout);
safe_fclose (&fperr);
}
int smime_verify_sender(HEADER *h)
{
char *mbox = NULL, *certfile, tempfname[_POSIX_PATH_MAX];
FILE *fpout;
int retval=1;
mutt_mktemp (tempfname, sizeof (tempfname));
if (!(fpout = safe_fopen (tempfname, "w")))
{
mutt_perror (tempfname);
return 1;
}
if(h->security & ENCRYPT)
mutt_copy_message (fpout, Context, h,
M_CM_DECODE_CRYPT & M_CM_DECODE_SMIME,
CH_MIME|CH_WEED|CH_NONEWLINE);
else
mutt_copy_message (fpout, Context, h, 0, 0);
fflush(fpout);
safe_fclose (&fpout);
if (h->env->from)
{
h->env->from = mutt_expand_aliases (h->env->from);
mbox = h->env->from->mailbox;
}
else if (h->env->sender)
{
h->env->sender = mutt_expand_aliases (h->env->sender);
mbox = h->env->sender->mailbox;
}
if (mbox)
{
if ((certfile = smime_extract_signer_certificate(tempfname)))
{
mutt_unlink(tempfname);
if (smime_handle_cert_email (certfile, mbox, 0, NULL, NULL))
{
if(isendwin())
mutt_any_key_to_continue(NULL);
}
else
retval = 0;
mutt_unlink(certfile);
FREE (&certfile);
}
else
mutt_any_key_to_continue(_("no certfile"));
}
else
mutt_any_key_to_continue(_("no mbox"));
mutt_unlink(tempfname);
return retval;
}
/*
* Creating S/MIME - bodies.
*/
static
pid_t smime_invoke_encrypt (FILE **smimein, FILE **smimeout, FILE **smimeerr,
int smimeinfd, int smimeoutfd, int smimeerrfd,
const char *fname, const char *uids)
{
return smime_invoke (smimein, smimeout, smimeerr,
smimeinfd, smimeoutfd, smimeerrfd,
fname, NULL, SmimeCryptAlg, NULL, uids, NULL,
SmimeEncryptCommand);
}
static
pid_t smime_invoke_sign (FILE **smimein, FILE **smimeout, FILE **smimeerr,
int smimeinfd, int smimeoutfd, int smimeerrfd,
const char *fname)
{
return smime_invoke (smimein, smimeout, smimeerr, smimeinfd, smimeoutfd,
smimeerrfd, fname, NULL, NULL, SmimeKeyToUse,
SmimeCertToUse, SmimeIntermediateToUse,
SmimeSignCommand);
}
BODY *smime_build_smime_entity (BODY *a, char *certlist)
{
char buf[LONG_STRING], certfile[LONG_STRING];
char tempfile[_POSIX_PATH_MAX], smimeerrfile[_POSIX_PATH_MAX];
char smimeinfile[_POSIX_PATH_MAX];
char *cert_start = certlist, *cert_end = certlist;
FILE *smimein = NULL, *smimeerr = NULL, *fpout = NULL, *fptmp = NULL;
BODY *t;
int err = 0, empty;
pid_t thepid;
mutt_mktemp (tempfile, sizeof (tempfile));
if ((fpout = safe_fopen (tempfile, "w+")) == NULL)
{
mutt_perror (tempfile);
return (NULL);
}
mutt_mktemp (smimeerrfile, sizeof (smimeerrfile));
if ((smimeerr = safe_fopen (smimeerrfile, "w+")) == NULL)
{
mutt_perror (smimeerrfile);
safe_fclose (&fpout);
mutt_unlink (tempfile);
return NULL;
}
mutt_unlink (smimeerrfile);
mutt_mktemp (smimeinfile, sizeof (smimeinfile));
if ((fptmp = safe_fopen (smimeinfile, "w+")) == NULL)
{
mutt_perror (smimeinfile);
mutt_unlink (tempfile);
safe_fclose (&fpout);
safe_fclose (&smimeerr);
return NULL;
}
*certfile = '\0';
while (1)
{
int off = mutt_strlen (certfile);
while (*++cert_end && *cert_end != '\n');
if (!*cert_end) break;
*cert_end = '\0';
snprintf (certfile+off, sizeof (certfile)-off, " %s/%s",
NONULL(SmimeCertificates), cert_start);
*cert_end = '\n';
cert_start = cert_end;
cert_start++;
}
/* write a MIME entity */
mutt_write_mime_header (a, fptmp);
fputc ('\n', fptmp);
mutt_write_mime_body (a, fptmp);
safe_fclose (&fptmp);
if ((thepid =
smime_invoke_encrypt (&smimein, NULL, NULL, -1,
fileno (fpout), fileno (smimeerr),
smimeinfile, certfile)) == -1)
{
safe_fclose (&smimeerr);
mutt_unlink (smimeinfile);
mutt_unlink (certfile);
return (NULL);
}
safe_fclose (&smimein);
mutt_wait_filter (thepid);
mutt_unlink (smimeinfile);
mutt_unlink (certfile);
fflush (fpout);
rewind (fpout);
empty = (fgetc (fpout) == EOF);
safe_fclose (&fpout);
fflush (smimeerr);
rewind (smimeerr);
while (fgets (buf, sizeof (buf) - 1, smimeerr) != NULL)
{
err = 1;
fputs (buf, stdout);
}
safe_fclose (&smimeerr);
/* pause if there is any error output from SMIME */
if (err)
mutt_any_key_to_continue (NULL);
if (empty)
{
/* fatal error while trying to encrypt message */
if (!err) mutt_any_key_to_continue _("No output from OpenSSL..");
mutt_unlink (tempfile);
return (NULL);
}
t = mutt_new_body ();
t->type = TYPEAPPLICATION;
t->subtype = safe_strdup ("x-pkcs7-mime");
mutt_set_parameter ("name", "smime.p7m", &t->parameter);
mutt_set_parameter ("smime-type", "enveloped-data", &t->parameter);
t->encoding = ENCBASE64; /* The output of OpenSSL SHOULD be binary */
t->use_disp = 1;
t->disposition = DISPATTACH;
t->d_filename = safe_strdup ("smime.p7m");
t->filename = safe_strdup (tempfile);
t->unlink = 1; /*delete after sending the message */
t->parts=0;
t->next=0;
return (t);
}
BODY *smime_sign_message (BODY *a )
{
BODY *t;
char buffer[LONG_STRING];
char signedfile[_POSIX_PATH_MAX], filetosign[_POSIX_PATH_MAX];
FILE *smimein = NULL, *smimeout = NULL, *smimeerr = NULL, *sfp = NULL;
int err = 0;
int empty = 0;
pid_t thepid;
char *intermediates = smime_get_field_from_db(NULL, SmimeDefaultKey, 1, 1);
if (!SmimeDefaultKey)
{
mutt_error _("Can't sign: No key specified. Use Sign As.");
FREE (&intermediates);
return NULL;
}
if (!intermediates)
{
mutt_message(_("Warning: Intermediate certificate not found."));
intermediates = SmimeDefaultKey; /* so openssl won't complain in any case */
}
convert_to_7bit (a); /* Signed data _must_ be in 7-bit format. */
mutt_mktemp (filetosign, sizeof (filetosign));
if ((sfp = safe_fopen (filetosign, "w+")) == NULL)
{
mutt_perror (filetosign);
if (intermediates != SmimeDefaultKey)
FREE (&intermediates);
return NULL;
}
mutt_mktemp (signedfile, sizeof (signedfile));
if ((smimeout = safe_fopen (signedfile, "w+")) == NULL)
{
mutt_perror (signedfile);
safe_fclose (&sfp);
mutt_unlink (filetosign);
if (intermediates != SmimeDefaultKey)
FREE (&intermediates);
return NULL;
}
mutt_write_mime_header (a, sfp);
fputc ('\n', sfp);
mutt_write_mime_body (a, sfp);
safe_fclose (&sfp);
snprintf (SmimeKeyToUse, sizeof (SmimeKeyToUse), "%s/%s",
NONULL(SmimeKeys), SmimeDefaultKey);
snprintf (SmimeCertToUse, sizeof (SmimeCertToUse), "%s/%s",
NONULL(SmimeCertificates), SmimeDefaultKey);
snprintf (SmimeIntermediateToUse, sizeof (SmimeIntermediateToUse), "%s/%s",
NONULL(SmimeCertificates), intermediates);
if ((thepid = smime_invoke_sign (&smimein, NULL, &smimeerr,
-1, fileno (smimeout), -1, filetosign)) == -1)
{
mutt_perror _("Can't open OpenSSL subprocess!");
safe_fclose (&smimeout);
mutt_unlink (signedfile);
mutt_unlink (filetosign);
if (intermediates != SmimeDefaultKey)
FREE (&intermediates);
return NULL;
}
fputs (SmimePass, smimein);
fputc ('\n', smimein);
safe_fclose (&smimein);
mutt_wait_filter (thepid);
/* check for errors from OpenSSL */
err = 0;
fflush (smimeerr);
rewind (smimeerr);
while (fgets (buffer, sizeof (buffer) - 1, smimeerr) != NULL)
{
err = 1;
fputs (buffer, stdout);
}
safe_fclose (&smimeerr);
fflush (smimeout);
rewind (smimeout);
empty = (fgetc (smimeout) == EOF);
safe_fclose (&smimeout);
mutt_unlink (filetosign);
if (err)
mutt_any_key_to_continue (NULL);
if (empty)
{
mutt_any_key_to_continue _("No output from OpenSSL...");
mutt_unlink (signedfile);
return (NULL); /* fatal error while signing */
}
t = mutt_new_body ();
t->type = TYPEMULTIPART;
t->subtype = safe_strdup ("signed");
t->encoding = ENC7BIT;
t->use_disp = 0;
t->disposition = DISPINLINE;
mutt_generate_boundary (&t->parameter);
/* check if this can be extracted from private key somehow.... */
mutt_set_parameter ("micalg", "sha1", &t->parameter);
mutt_set_parameter ("protocol", "application/x-pkcs7-signature",
&t->parameter);
t->parts = a;
a = t;
t->parts->next = mutt_new_body ();
t = t->parts->next;
t->type = TYPEAPPLICATION;
t->subtype = safe_strdup ("x-pkcs7-signature");
t->filename = safe_strdup (signedfile);
t->d_filename = safe_strdup ("smime.p7s");
t->use_disp = 1;
t->disposition = DISPATTACH;
t->encoding = ENCBASE64;
t->unlink = 1; /* ok to remove this file after sending. */
return (a);
}
/*
* Handling S/MIME - bodies.
*/
static
pid_t smime_invoke_verify (FILE **smimein, FILE **smimeout, FILE **smimeerr,
int smimeinfd, int smimeoutfd, int smimeerrfd,
const char *fname, const char *sig_fname, int opaque)
{
return smime_invoke (smimein, smimeout, smimeerr, smimeinfd, smimeoutfd,
smimeerrfd, fname, sig_fname, NULL, NULL, NULL, NULL,
(opaque ? SmimeVerifyOpaqueCommand : SmimeVerifyCommand));
}
static
pid_t smime_invoke_decrypt (FILE **smimein, FILE **smimeout, FILE **smimeerr,
int smimeinfd, int smimeoutfd, int smimeerrfd,
const char *fname)
{
return smime_invoke (smimein, smimeout, smimeerr, smimeinfd, smimeoutfd,
smimeerrfd, fname, NULL, NULL, SmimeKeyToUse,
SmimeCertToUse, NULL, SmimeDecryptCommand);
}
int smime_verify_one (BODY *sigbdy, STATE *s, const char *tempfile)
{
char signedfile[_POSIX_PATH_MAX], smimeerrfile[_POSIX_PATH_MAX];
FILE *fp=NULL, *smimeout=NULL, *smimeerr=NULL;
pid_t thepid;
int badsig = -1;
long tmpoffset = 0;
size_t tmplength = 0;
int origType = sigbdy->type;
char *savePrefix = NULL;
snprintf (signedfile, sizeof (signedfile), "%s.sig", tempfile);
/* decode to a tempfile, saving the original destination */
fp = s->fpout;
if ((s->fpout = safe_fopen (signedfile, "w")) == NULL)
{
mutt_perror (signedfile);
return -1;
}
/* decoding the attachment changes the size and offset, so save a copy
* of the "real" values now, and restore them after processing
*/
tmplength = sigbdy->length;
tmpoffset = sigbdy->offset;
/* if we are decoding binary bodies, we don't want to prefix each
* line with the prefix or else the data will get corrupted.
*/
savePrefix = s->prefix;
s->prefix = NULL;
mutt_decode_attachment (sigbdy, s);
sigbdy->length = ftello (s->fpout);
sigbdy->offset = 0;
safe_fclose (&s->fpout);
/* restore final destination and substitute the tempfile for input */
s->fpout = fp;
fp = s->fpin;
s->fpin = fopen (signedfile, "r");
/* restore the prefix */
s->prefix = savePrefix;
sigbdy->type = origType;
mutt_mktemp (smimeerrfile, sizeof (smimeerrfile));
if (!(smimeerr = safe_fopen (smimeerrfile, "w+")))
{
mutt_perror (smimeerrfile);
mutt_unlink (signedfile);
return -1;
}
crypt_current_time (s, "OpenSSL");
if ((thepid = smime_invoke_verify (NULL, &smimeout, NULL,
-1, -1, fileno (smimeerr),
tempfile, signedfile, 0)) != -1)
{
fflush (smimeout);
safe_fclose (&smimeout);
if (mutt_wait_filter (thepid))
badsig = -1;
else
{
char *line = NULL;
int lineno = 0;
size_t linelen;
fflush (smimeerr);
rewind (smimeerr);
line = mutt_read_line (line, &linelen, smimeerr, &lineno, 0);
if (linelen && !ascii_strcasecmp (line, "verification successful"))
badsig = 0;
FREE (&line);
}
}
fflush (smimeerr);
rewind (smimeerr);
mutt_copy_stream (smimeerr, s->fpout);
safe_fclose (&smimeerr);
state_attach_puts (_("[-- End of OpenSSL output --]\n\n"), s);
mutt_unlink (signedfile);
mutt_unlink (smimeerrfile);
sigbdy->length = tmplength;
sigbdy->offset = tmpoffset;
/* restore the original source stream */
safe_fclose (&s->fpin);
s->fpin = fp;
return badsig;
}
/*
This handles application/pkcs7-mime which can either be a signed
or an encrypted message.
*/
static BODY *smime_handle_entity (BODY *m, STATE *s, FILE *outFile)
{
int len=0;
int c;
char buf[HUGE_STRING];
char outfile[_POSIX_PATH_MAX], errfile[_POSIX_PATH_MAX];
char tmpfname[_POSIX_PATH_MAX];
char tmptmpfname[_POSIX_PATH_MAX];
FILE *smimeout = NULL, *smimein=NULL, *smimeerr=NULL;
FILE *tmpfp=NULL, *tmpfp_buffer=NULL, *fpout=NULL;
struct stat info;
BODY *p=NULL;
pid_t thepid=-1;
unsigned int type = mutt_is_application_smime (m);
if (!(type & APPLICATION_SMIME)) return NULL;
mutt_mktemp (outfile, sizeof (outfile));
if ((smimeout = safe_fopen (outfile, "w+")) == NULL)
{
mutt_perror (outfile);
return NULL;
}
mutt_mktemp (errfile, sizeof (errfile));
if ((smimeerr = safe_fopen (errfile, "w+")) == NULL)
{
mutt_perror (errfile);
safe_fclose (&smimeout); smimeout = NULL;
return NULL;
}
mutt_unlink (errfile);
mutt_mktemp (tmpfname, sizeof (tmpfname));
if ((tmpfp = safe_fopen (tmpfname, "w+")) == NULL)
{
mutt_perror (tmpfname);
safe_fclose (&smimeout); smimeout = NULL;
safe_fclose (&smimeerr); smimeerr = NULL;
return NULL;
}
fseeko (s->fpin, m->offset, 0);
mutt_copy_bytes (s->fpin, tmpfp, m->length);
fflush (tmpfp);
safe_fclose (&tmpfp);
if ((type & ENCRYPT) &&
(thepid = smime_invoke_decrypt (&smimein, NULL, NULL, -1,
fileno (smimeout), fileno (smimeerr), tmpfname)) == -1)
{
safe_fclose (&smimeout); smimeout = NULL;
mutt_unlink (tmpfname);
if (s->flags & M_DISPLAY)
state_attach_puts (_("[-- Error: unable to create OpenSSL subprocess! --]\n"), s);
return NULL;
}
else if ((type & SIGNOPAQUE) &&
(thepid = smime_invoke_verify (&smimein, NULL, NULL, -1,
fileno (smimeout), fileno (smimeerr), NULL,
tmpfname, SIGNOPAQUE)) == -1)
{
safe_fclose (&smimeout); smimeout = NULL;
mutt_unlink (tmpfname);
if (s->flags & M_DISPLAY)
state_attach_puts (_("[-- Error: unable to create OpenSSL subprocess! --]\n"), s);
return NULL;
}
if (type & ENCRYPT)
{
if (!smime_valid_passphrase ())
smime_void_passphrase ();
fputs (SmimePass, smimein);
fputc ('\n', smimein);
}
safe_fclose (&smimein);
mutt_wait_filter (thepid);
mutt_unlink (tmpfname);
if (s->flags & M_DISPLAY)
{
fflush (smimeerr);
rewind (smimeerr);
if ((c = fgetc (smimeerr)) != EOF)
{
ungetc (c, smimeerr);
crypt_current_time (s, "OpenSSL");
mutt_copy_stream (smimeerr, s->fpout);
state_attach_puts (_("[-- End of OpenSSL output --]\n\n"), s);
}
if (type & ENCRYPT)
state_attach_puts (_("[-- The following data is S/MIME"
" encrypted --]\n"), s);
else
state_attach_puts (_("[-- The following data is S/MIME signed --]\n"), s);
}
if (smimeout)
{
fflush (smimeout);
rewind (smimeout);
if (outFile) fpout = outFile;
else
{
mutt_mktemp (tmptmpfname, sizeof (tmptmpfname));
if ((fpout = safe_fopen (tmptmpfname, "w+")) == NULL)
{
mutt_perror(tmptmpfname);
safe_fclose (&smimeout); smimeout = NULL;
return NULL;
}
}
while (fgets (buf, sizeof (buf) - 1, smimeout) != NULL)
{
len = mutt_strlen (buf);
if (len > 1 && buf[len - 2] == '\r')
{
buf[len-2] = '\n';
buf[len-1] = '\0';
}
fputs (buf, fpout);
}
fflush (fpout);
rewind (fpout);
if ((p = mutt_read_mime_header (fpout, 0)) != NULL)
{
fstat (fileno (fpout), &info);
p->length = info.st_size - p->offset;
mutt_parse_part (fpout, p);
if (s->fpout)
{
rewind (fpout);
tmpfp_buffer = s->fpin;
s->fpin = fpout;
mutt_body_handler (p, s);
s->fpin = tmpfp_buffer;
}
}
safe_fclose (&smimeout);
smimeout = NULL;
mutt_unlink (outfile);
if (!outFile)
{
safe_fclose (&fpout);
mutt_unlink (tmptmpfname);
}
fpout = NULL;
}
if (s->flags & M_DISPLAY)
{
if (type & ENCRYPT)
state_attach_puts (_("\n[-- End of S/MIME encrypted data. --]\n"), s);
else
state_attach_puts (_("\n[-- End of S/MIME signed data. --]\n"), s);
}
if (type & SIGNOPAQUE)
{
char *line = NULL;
int lineno = 0;
size_t linelen;
rewind (smimeerr);
line = mutt_read_line (line, &linelen, smimeerr, &lineno, 0);
if (linelen && !ascii_strcasecmp (line, "verification successful"))
m->goodsig = 1;
FREE (&line);
}
else
{
m->goodsig = p->goodsig;
m->badsig = p->badsig;
}
safe_fclose (&smimeerr);
return (p);
}
int smime_decrypt_mime (FILE *fpin, FILE **fpout, BODY *b, BODY **cur)
{
char tempfile[_POSIX_PATH_MAX];
STATE s;
long tmpoffset = b->offset;
size_t tmplength = b->length;
int origType = b->type;
FILE *tmpfp=NULL;
int rv = 0;
if (!mutt_is_application_smime (b))
return -1;
if (b->parts)
return -1;
memset (&s, 0, sizeof (s));
s.fpin = fpin;
fseeko (s.fpin, b->offset, 0);
mutt_mktemp (tempfile, sizeof (tempfile));
if ((tmpfp = safe_fopen (tempfile, "w+")) == NULL)
{
mutt_perror (tempfile);
return (-1);
}
mutt_unlink (tempfile);
s.fpout = tmpfp;
mutt_decode_attachment (b, &s);
fflush (tmpfp);
b->length = ftello (s.fpout);
b->offset = 0;
rewind (tmpfp);
s.fpin = tmpfp;
s.fpout = 0;
mutt_mktemp (tempfile, sizeof (tempfile));
if ((*fpout = safe_fopen (tempfile, "w+")) == NULL)
{
mutt_perror (tempfile);
rv = -1;
goto bail;
}
mutt_unlink (tempfile);
if (!(*cur = smime_handle_entity (b, &s, *fpout)))
{
rv = -1;
goto bail;
}
(*cur)->goodsig = b->goodsig;
(*cur)->badsig = b->badsig;
bail:
b->type = origType;
b->length = tmplength;
b->offset = tmpoffset;
safe_fclose (&tmpfp);
if (*fpout)
rewind (*fpout);
return rv;
}
int smime_application_smime_handler (BODY *m, STATE *s)
{
return smime_handle_entity (m, s, NULL) ? 0 : -1;
}
int smime_send_menu (HEADER *msg, int *redraw)
{
char *p;
if (!(WithCrypto & APPLICATION_SMIME))
return msg->security;
switch (mutt_multi_choice (_("S/MIME (e)ncrypt, (s)ign, encrypt (w)ith, sign (a)s, (b)oth, or (c)lear? "),
_("eswabfc")))
{
case 1: /* (e)ncrypt */
msg->security |= ENCRYPT;
msg->security &= ~SIGN;
break;
case 3: /* encrypt (w)ith */
{
int choice = 0;
msg->security |= ENCRYPT;
do
{
/* I use "dra" because "123" is recognized anyway */
switch (mutt_multi_choice (_("Choose algorithm family:"
" 1: DES, 2: RC2, 3: AES,"
" or (c)lear? "),
_("drac")))
{
case 1:
switch (choice = mutt_multi_choice (_("1: DES, 2: Triple-DES "),
_("dt")))
{
case 1:
mutt_str_replace (&SmimeCryptAlg, "des");
break;
case 2:
mutt_str_replace (&SmimeCryptAlg, "des3");
break;
}
break;
case 2:
switch (choice = mutt_multi_choice (_("1: RC2-40, 2: RC2-64, 3: RC2-128 "),
_("468")))
{
case 1:
mutt_str_replace (&SmimeCryptAlg, "rc2-40");
break;
case 2:
mutt_str_replace (&SmimeCryptAlg, "rc2-64");
break;
case 3:
mutt_str_replace (&SmimeCryptAlg, "rc2-128");
break;
}
break;
case 3:
switch (choice = mutt_multi_choice (_("1: AES128, 2: AES192, 3: AES256 "),
_("895")))
{
case 1:
mutt_str_replace (&SmimeCryptAlg, "aes128");
break;
case 2:
mutt_str_replace (&SmimeCryptAlg, "aes192");
break;
case 3:
mutt_str_replace (&SmimeCryptAlg, "aes256");
break;
}
break;
case 4: /* (c)lear */
FREE (&SmimeCryptAlg);
/* fallback */
case -1: /* Ctrl-G or Enter */
choice = 0;
break;
}
} while (choice == -1);
}
break;
case 2: /* (s)ign */
if(!SmimeDefaultKey)
{
*redraw = REDRAW_FULL;
if ((p = smime_ask_for_key (_("Sign as: "), NULL, 0)))
mutt_str_replace (&SmimeDefaultKey, p);
else
break;
}
msg->security |= SIGN;
msg->security &= ~ENCRYPT;
break;
case 4: /* sign (a)s */
if ((p = smime_ask_for_key (_("Sign as: "), NULL, 0)))
{
mutt_str_replace (&SmimeDefaultKey, p);
msg->security |= SIGN;
/* probably need a different passphrase */
crypt_smime_void_passphrase ();
}
#if 0
else
msg->security &= ~SIGN;
#endif
*redraw = REDRAW_FULL;
break;
case 5: /* (b)oth */
msg->security |= (ENCRYPT | SIGN);
break;
case 6: /* (f)orget it */
case 7: /* (c)lear */
msg->security = 0;
break;
}
if (msg->security && msg->security != APPLICATION_SMIME)
msg->security |= APPLICATION_SMIME;
else
msg->security = 0;
return (msg->security);
}
#endif /* CRYPT_BACKEND_CLASSIC_SMIME */
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