+++ /dev/null
-/*
- * Copyright notice from original mutt:
- * Copyright (C) 1996,1997 Michael R. Elkins <me@mutt.org>
- * Copyright (C) 1999-2000 Thomas Roessler <roessler@does-not-exist.org>
- * Copyright (C) 2001 Thomas Roessler <roessler@does-not-exist.org>
- * Oliver Ehli <elmy@acm.org>
- * Copyright (C) 2003 Werner Koch <wk@gnupg.org>
- * Copyright (C) 2004 g10code GmbH
- *
- * This file is part of mutt-ng, see http://www.muttng.org/.
- * It's licensed under the GNU General Public License,
- * please see the file GPL in the top level source directory.
- */
-
-#if HAVE_CONFIG_H
-# include "config.h"
-#endif
-
-#include <lib-lib/str.h>
-#include <lib-lib/file.h>
-#include <lib-lib/ascii.h>
-#include <lib-lib/mem.h>
-#include <lib-lib/macros.h>
-
-#include <lib-mime/mime.h>
-
-#include "mutt.h"
-#include "handler.h"
-#include "mutt_curses.h"
-#include "copy.h"
-#include "mutt_crypt.h"
-#include "pgp.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
-
-
-/* print the current time to avoid spoofing of the signature output */
-void crypt_current_time (STATE * s, const char *app_name)
-{
- time_t t;
- char p[STRING], tmp[STRING];
-
- if (option (OPTCRYPTTIMESTAMP)) {
- t = time (NULL);
- setlocale (LC_TIME, "");
- strftime (p, sizeof (p), _(" (current time: %c)"), localtime (&t));
- setlocale (LC_TIME, "C");
- }
- else
- *p = '\0';
-
- snprintf (tmp, sizeof (tmp), _("[-- %s output follows%s --]\n"),
- NONULL (app_name), p);
- state_attach_puts (tmp, s);
-}
-
-
-
-void crypt_forget_passphrase (void)
-{
- crypt_pgp_void_passphrase ();
- crypt_smime_void_passphrase ();
- mutt_message _("Passphrase(s) forgotten.");
-}
-
-
-#if defined(HAVE_SETRLIMIT) && (!defined(DEBUG))
-
-static void disable_coredumps (void)
-{
- struct rlimit rl = { 0, 0 };
- static short done = 0;
-
- if (!done) {
- setrlimit (RLIMIT_CORE, &rl);
- done = 1;
- }
-}
-
-#endif /* HAVE_SETRLIMIT */
-
-
-int crypt_valid_passphrase (int flags)
-{
- int ret = 0;
-
-# if defined(HAVE_SETRLIMIT) &&(!defined(DEBUG))
- disable_coredumps ();
-# endif
-
- if (flags & APPLICATION_PGP)
- ret = crypt_pgp_valid_passphrase ();
-
- if (flags & APPLICATION_SMIME)
- ret = crypt_smime_valid_passphrase ();
-
- return ret;
-}
-
-
-
-int mutt_protect (HEADER * msg, char *keylist)
-{
- BODY *pbody = NULL, *tmp_pbody = NULL;
- BODY *tmp_smime_pbody = NULL;
- BODY *tmp_pgp_pbody = NULL;
- int flags = msg->security;
- int i;
-
- if ((msg->security & SIGN) && !crypt_valid_passphrase (msg->security))
- return (-1);
-
- if ((msg->security & PGPINLINE) == PGPINLINE) {
- /* they really want to send it inline... go for it */
- if (!isendwin ())
- mutt_endwin _("Invoking PGP...");
-
- pbody = crypt_pgp_traditional_encryptsign (msg->content, flags, keylist);
- if (pbody) {
- msg->content = pbody;
- return 0;
- }
-
- /* otherwise inline won't work...ask for revert */
- if ((i =
- query_quadoption (OPT_PGPMIMEAUTO,
- _
- ("Message can't be sent inline. Revert to using PGP/MIME?")))
- != M_YES) {
- mutt_error _("Mail not sent.");
-
- return -1;
- }
-
- /* go ahead with PGP/MIME */
- }
-
- if (!isendwin ())
- mutt_endwin (NULL);
-
- tmp_smime_pbody = msg->content;
- tmp_pgp_pbody = msg->content;
-
- if (msg->security & SIGN) {
- if (msg->security & APPLICATION_SMIME) {
- if (!(tmp_pbody = crypt_smime_sign_message (msg->content)))
- return -1;
- pbody = tmp_smime_pbody = tmp_pbody;
- }
-
- if ((msg->security & APPLICATION_PGP)
- && (!(flags & ENCRYPT) || option (OPTPGPRETAINABLESIG))) {
- if (!(tmp_pbody = crypt_pgp_sign_message (msg->content)))
- return -1;
-
- flags &= ~SIGN;
- pbody = tmp_pgp_pbody = tmp_pbody;
- }
-
- if ((msg->security & APPLICATION_SMIME)
- && (msg->security & APPLICATION_PGP)) {
- /* here comes the draft ;-) */
- }
- }
-
-
- if (msg->security & ENCRYPT) {
- if ((msg->security & APPLICATION_SMIME)) {
- if (!(tmp_pbody = crypt_smime_build_smime_entity (tmp_smime_pbody,
- keylist))) {
- /* signed ? free it! */
- return (-1);
- }
- /* free tmp_body if messages was signed AND encrypted ... */
- if (tmp_smime_pbody != msg->content && tmp_smime_pbody != tmp_pbody) {
- /* detatch and dont't delete msg->content,
- which tmp_smime_pbody->parts after signing. */
- tmp_smime_pbody->parts = tmp_smime_pbody->parts->next;
- msg->content->next = NULL;
- mutt_free_body (&tmp_smime_pbody);
- }
- pbody = tmp_pbody;
- }
-
- if ((msg->security & APPLICATION_PGP)) {
- if (!(pbody = crypt_pgp_encrypt_message (tmp_pgp_pbody, keylist,
- flags & SIGN))) {
-
- /* did we perform a retainable signature? */
- if (flags != msg->security) {
- /* remove the outer multipart layer */
- tmp_pgp_pbody = mutt_remove_multipart (tmp_pgp_pbody);
- /* get rid of the signature */
- mutt_free_body (&tmp_pgp_pbody->next);
- }
-
- return (-1);
- }
-
- /* destroy temporary signature envelope when doing retainable
- * signatures.
-
- */
- if (flags != msg->security) {
- tmp_pgp_pbody = mutt_remove_multipart (tmp_pgp_pbody);
- mutt_free_body (&tmp_pgp_pbody->next);
- }
- }
- }
-
- if (pbody)
- msg->content = pbody;
-
- return 0;
-}
-
-
-
-
-int mutt_is_multipart_signed (BODY * b)
-{
- char *p;
-
- if (!b || !(b->type == TYPEMULTIPART) ||
- !b->subtype || ascii_strcasecmp (b->subtype, "signed"))
- return 0;
-
- if (!(p = mutt_get_parameter ("protocol", b->parameter)))
- return 0;
-
- if (!(ascii_strcasecmp (p, "multipart/mixed")))
- return SIGN;
-
- if (!(ascii_strcasecmp (p, "application/pgp-signature")))
- return PGPSIGN;
-
- if (!(ascii_strcasecmp (p, "application/x-pkcs7-signature")))
- return SMIMESIGN;
- if (!(ascii_strcasecmp (p, "application/pkcs7-signature")))
- return SMIMESIGN;
-
- return 0;
-}
-
-
-int mutt_is_multipart_encrypted (BODY * b)
-{
- char *p;
-
- if (!b || b->type != TYPEMULTIPART ||
- !b->subtype || ascii_strcasecmp (b->subtype, "encrypted") ||
- !(p = mutt_get_parameter ("protocol", b->parameter)) ||
- ascii_strcasecmp (p, "application/pgp-encrypted"))
- return 0;
-
- return PGPENCRYPT;
-}
-
-
-int mutt_is_application_pgp (BODY * m)
-{
- int t = 0;
- char *p;
-
- if (m->type == TYPEAPPLICATION) {
- if (!ascii_strcasecmp (m->subtype, "pgp")
- || !ascii_strcasecmp (m->subtype, "x-pgp-message")) {
- if ((p = mutt_get_parameter ("x-action", m->parameter))
- && (!ascii_strcasecmp (p, "sign")
- || !ascii_strcasecmp (p, "signclear")))
- t |= PGPSIGN;
-
- if ((p = mutt_get_parameter ("format", m->parameter)) &&
- !ascii_strcasecmp (p, "keys-only"))
- t |= PGPKEY;
-
- if (!t)
- t |= PGPENCRYPT; /* not necessarily correct, but... */
- }
-
- if (!ascii_strcasecmp (m->subtype, "pgp-signed"))
- t |= PGPSIGN;
-
- if (!ascii_strcasecmp (m->subtype, "pgp-keys"))
- t |= PGPKEY;
- }
- else if (m->type == TYPETEXT && ascii_strcasecmp ("plain", m->subtype) == 0) {
- if (((p = mutt_get_parameter ("x-mutt-action", m->parameter))
- || (p = mutt_get_parameter ("x-action", m->parameter))
- || (p = mutt_get_parameter ("action", m->parameter)))
- && !ascii_strncasecmp ("pgp-sign", p, 8))
- t |= PGPSIGN;
- else if (p && !ascii_strncasecmp ("pgp-encrypt", p, 11))
- t |= PGPENCRYPT;
- else if (p && !ascii_strncasecmp ("pgp-keys", p, 7))
- t |= PGPKEY;
- }
- if (t)
- t |= PGPINLINE;
-
- return t;
-}
-
-int mutt_is_application_smime (BODY * m)
-{
- char *t = NULL;
- int len, complain = 0;
-
- if (!m)
- return 0;
-
- if ((m->type & TYPEAPPLICATION) && m->subtype) {
- /* S/MIME MIME types don't need x- anymore, see RFC2311 */
- if (!ascii_strcasecmp (m->subtype, "x-pkcs7-mime") ||
- !ascii_strcasecmp (m->subtype, "pkcs7-mime")) {
- if ((t = mutt_get_parameter ("smime-type", m->parameter))) {
- if (!ascii_strcasecmp (t, "enveloped-data"))
- return SMIMEENCRYPT;
- else if (!ascii_strcasecmp (t, "signed-data"))
- return (SMIMESIGN | SMIMEOPAQUE);
- else
- return 0;
- }
- /* Netscape 4.7 uses
- * Content-Description: S/MIME Encrypted Message
- * instead of Content-Type parameter
- */
- if (!ascii_strcasecmp (m->description, "S/MIME Encrypted Message"))
- return SMIMEENCRYPT;
- complain = 1;
- }
- else if (ascii_strcasecmp (m->subtype, "octet-stream"))
- return 0;
-
- t = mutt_get_parameter ("name", m->parameter);
-
- if (!t)
- t = m->d_filename;
- if (!t)
- t = m->filename;
- if (!t) {
- if (complain)
- mutt_message (_
- ("S/MIME messages with no hints on content are unsupported."));
- return 0;
- }
-
- /* no .p7c, .p10 support yet. */
-
- len = m_strlen(t) - 4;
- if (len > 0 && *(t + len) == '.') {
- len++;
- if (!ascii_strcasecmp ((t + len), "p7m"))
-#if 0
- return SMIMEENCRYPT;
-#else
- /* Not sure if this is the correct thing to do, but
- it's required for compatibility with Outlook */
- return (SMIMESIGN | SMIMEOPAQUE);
-#endif
- else if (!ascii_strcasecmp ((t + len), "p7s"))
- return (SMIMESIGN | SMIMEOPAQUE);
- }
- }
-
- return 0;
-}
-
-
-
-
-
-
-int crypt_query (BODY * m)
-{
- int t = 0;
-
- if (!m)
- return 0;
-
- if (m->type == TYPEAPPLICATION) {
- t |= mutt_is_application_pgp (m);
-
- t |= mutt_is_application_smime (m);
- if (t && m->goodsig)
- t |= GOODSIGN;
- if (t && m->badsig)
- t |= BADSIGN;
- }
- else if (m->type == TYPETEXT) {
- t |= mutt_is_application_pgp (m);
- if (t && m->goodsig)
- t |= GOODSIGN;
- }
-
- if (m->type == TYPEMULTIPART) {
- t |= mutt_is_multipart_encrypted (m);
- t |= mutt_is_multipart_signed (m);
-
- if (t && m->goodsig)
- t |= GOODSIGN;
- }
-
- if (m->type == TYPEMULTIPART || m->type == TYPEMESSAGE) {
- BODY *p;
- int u, v, w;
-
- u = m->parts ? 0xffffffff : 0; /* Bits set in all parts */
- w = 0; /* Bits set in any part */
-
- for (p = m->parts; p; p = p->next) {
- v = crypt_query (p);
- u &= v;
- w |= v;
- }
- t |= u | (w & ~GOODSIGN);
-
- if ((w & GOODSIGN) && !(u & GOODSIGN))
- t |= PARTSIGN;
- }
-
- return t;
-}
-
-
-
-
-int crypt_write_signed (BODY * a, STATE * s, const char *tempfile)
-{
- FILE *fp;
- int c;
- short hadcr;
- size_t bytes;
-
- if (!(fp = safe_fopen (tempfile, "w"))) {
- mutt_perror (tempfile);
- return -1;
- }
-
- fseeko (s->fpin, a->hdr_offset, 0);
- bytes = a->length + a->offset - a->hdr_offset;
- hadcr = 0;
- while (bytes > 0) {
- if ((c = fgetc (s->fpin)) == EOF)
- break;
-
- bytes--;
-
- if (c == '\r')
- hadcr = 1;
- else {
- if (c == '\n' && !hadcr)
- fputc ('\r', fp);
-
- hadcr = 0;
- }
-
- fputc (c, fp);
-
- }
- fclose (fp);
-
- return 0;
-}
-
-
-
-void convert_to_7bit (BODY * a)
-{
- while (a) {
- if (a->type == TYPEMULTIPART) {
- if (a->encoding != ENC7BIT) {
- a->encoding = ENC7BIT;
- convert_to_7bit (a->parts);
- }
- else if (option (OPTPGPSTRICTENC))
- convert_to_7bit (a->parts);
- }
- else if (a->type == TYPEMESSAGE &&
- m_strcasecmp(a->subtype, "delivery-status")) {
- if (a->encoding != ENC7BIT)
- mutt_message_to_7bit (a, NULL);
- }
- else if (a->encoding == ENC8BIT)
- a->encoding = ENCQUOTEDPRINTABLE;
- else if (a->encoding == ENCBINARY)
- a->encoding = ENCBASE64;
- else if (a->content && a->encoding != ENCBASE64 &&
- (a->content->from || (a->content->space &&
- option (OPTPGPSTRICTENC))))
- a->encoding = ENCQUOTEDPRINTABLE;
- a = a->next;
- }
-}
-
-
-
-
-void crypt_extract_keys_from_messages (HEADER * h)
-{
- int i;
- char tempfname[_POSIX_PATH_MAX], *mbox;
- address_t *tmp = NULL;
- FILE *fpout;
-
- mutt_mktemp (tempfname);
- if (!(fpout = safe_fopen (tempfname, "w"))) {
- mutt_perror (tempfname);
- return;
- }
-
- set_option (OPTDONTHANDLEPGPKEYS);
-
- if (!h) {
- for (i = 0; i < Context->vcount; i++) {
- if (Context->hdrs[Context->v2r[i]]->tagged) {
- mutt_parse_mime_message (Context, Context->hdrs[Context->v2r[i]]);
- if (Context->hdrs[Context->v2r[i]]->security & ENCRYPT &&
- !crypt_valid_passphrase (Context->hdrs[Context->v2r[i]]->
- security)) {
- fclose (fpout);
- break;
- }
-
- if (Context->hdrs[Context->v2r[i]]->security & APPLICATION_PGP) {
- mutt_copy_message (fpout, Context, Context->hdrs[Context->v2r[i]],
- M_CM_DECODE | M_CM_CHARCONV, 0);
- fflush (fpout);
-
- mutt_endwin (_("Trying to extract PGP keys...\n"));
- crypt_pgp_invoke_import (tempfname);
- }
-
- if (Context->hdrs[Context->v2r[i]]->security & APPLICATION_SMIME) {
- if (Context->hdrs[Context->v2r[i]]->security & ENCRYPT)
- mutt_copy_message (fpout, Context, Context->hdrs[Context->v2r[i]],
- M_CM_NOHEADER | M_CM_DECODE_CRYPT
- | M_CM_DECODE_SMIME, 0);
- else
- mutt_copy_message (fpout, Context,
- Context->hdrs[Context->v2r[i]], 0, 0);
- fflush (fpout);
-
- if (Context->hdrs[Context->v2r[i]]->env->from)
- tmp = mutt_expand_aliases (h->env->from);
- else if (Context->hdrs[Context->v2r[i]]->env->sender)
- tmp = mutt_expand_aliases (Context->hdrs[Context->v2r[i]]
- ->env->sender);
- mbox = tmp ? tmp->mailbox : NULL;
- if (mbox) {
- mutt_endwin (_("Trying to extract S/MIME certificates...\n"));
- crypt_smime_invoke_import (tempfname, mbox);
- tmp = NULL;
- }
- }
-
- rewind (fpout);
- }
- }
- }
- else {
- mutt_parse_mime_message (Context, h);
- if (!(h->security & ENCRYPT && !crypt_valid_passphrase (h->security))) {
- if (h->security & APPLICATION_PGP) {
- mutt_copy_message (fpout, Context, h, M_CM_DECODE | M_CM_CHARCONV, 0);
- fflush (fpout);
- mutt_endwin (_("Trying to extract PGP keys...\n"));
- crypt_pgp_invoke_import (tempfname);
- }
-
- if (h->security & APPLICATION_SMIME) {
- if (h->security & ENCRYPT)
- mutt_copy_message (fpout, Context, h, M_CM_NOHEADER
- | M_CM_DECODE_CRYPT | M_CM_DECODE_SMIME, 0);
- else
- mutt_copy_message (fpout, Context, h, 0, 0);
-
- fflush (fpout);
- if (h->env->from)
- tmp = mutt_expand_aliases (h->env->from);
- else if (h->env->sender)
- tmp = mutt_expand_aliases (h->env->sender);
- mbox = tmp ? tmp->mailbox : NULL;
- if (mbox) { /* else ? */
- mutt_message (_("Trying to extract S/MIME certificates...\n"));
- crypt_smime_invoke_import (tempfname, mbox);
- }
- }
- }
- }
-
- fclose (fpout);
- if (isendwin ())
- mutt_any_key_to_continue (NULL);
-
- mutt_unlink (tempfname);
-
- unset_option (OPTDONTHANDLEPGPKEYS);
-}
-
-
-
-int crypt_get_keys (HEADER * msg, char **keylist)
-{
- /* Do a quick check to make sure that we can find all of the encryption
- * keys if the user has requested this service.
- */
-
- set_option (OPTPGPCHECKTRUST);
-
- *keylist = NULL;
-
- if (msg->security & ENCRYPT) {
- if (msg->security & APPLICATION_PGP) {
- if ((*keylist = crypt_pgp_findkeys (msg->env->to, msg->env->cc,
- msg->env->bcc)) == NULL)
- return (-1);
- unset_option (OPTPGPCHECKTRUST);
- }
- if (msg->security & APPLICATION_SMIME) {
- if ((*keylist = crypt_smime_findkeys (msg->env->to, msg->env->cc,
- msg->env->bcc)) == NULL)
- return (-1);
- }
- }
-
- return (0);
-}
-
-
-
-static void crypt_fetch_signatures (BODY ***signatures, BODY * a, int *n)
-{
- for (; a; a = a->next) {
- if (a->type == TYPEMULTIPART)
- crypt_fetch_signatures (signatures, a->parts, n);
- else {
- if ((*n % 5) == 0)
- p_realloc(signatures, *n + 6);
-
- (*signatures)[(*n)++] = a;
- }
- }
-}
-
-
-/*
- * This routine verifies a "multipart/signed" body.
- */
-
-int mutt_signed_handler (BODY * a, STATE * s)
-{
- char tempfile[_POSIX_PATH_MAX];
- char *protocol;
- int protocol_major = TYPEOTHER;
- char *protocol_minor = NULL;
-
- BODY *b = a;
- BODY **signatures = NULL;
- int sigcnt = 0;
- int i;
- short goodsig = 1;
- int rc = 0;
-
- protocol = mutt_get_parameter ("protocol", a->parameter);
- a = a->parts;
-
- /* extract the protocol information */
-
- if (protocol) {
- char major[STRING];
- char *t;
-
- if ((protocol_minor = strchr (protocol, '/')))
- protocol_minor++;
-
- m_strcpy(major, sizeof(major), protocol);
- if ((t = strchr (major, '/')))
- *t = '\0';
-
- protocol_major = mutt_check_mime_type (major);
- }
-
- /* consistency check */
-
- if (!(a && a->next && a->next->type == protocol_major &&
- !m_strcasecmp(a->next->subtype, protocol_minor))) {
- state_attach_puts (_("[-- Error: "
- "Inconsistent multipart/signed structure! --]\n\n"),
- s);
- return mutt_body_handler (a, s);
- }
-
-
- if (protocol_major == TYPEAPPLICATION
- && !m_strcasecmp(protocol_minor, "pgp-signature"));
- else if (protocol_major == TYPEAPPLICATION
- && !(m_strcasecmp(protocol_minor, "x-pkcs7-signature")
- && m_strcasecmp(protocol_minor, "pkcs7-signature")));
- else if (protocol_major == TYPEMULTIPART
- && !m_strcasecmp(protocol_minor, "mixed"));
- else {
- state_printf (s, _("[-- Error: "
- "Unknown multipart/signed protocol %s! --]\n\n"),
- protocol);
- return mutt_body_handler (a, s);
- }
-
- if (s->flags & M_DISPLAY) {
-
- crypt_fetch_signatures (&signatures, a->next, &sigcnt);
-
- if (sigcnt) {
- mutt_mktemp (tempfile);
- if (crypt_write_signed (a, s, tempfile) == 0) {
- for (i = 0; i < sigcnt; i++) {
- if (signatures[i]->type == TYPEAPPLICATION
- && !m_strcasecmp(signatures[i]->subtype, "pgp-signature")) {
- if (crypt_pgp_verify_one (signatures[i], s, tempfile) != 0)
- goodsig = 0;
-
- continue;
- }
-
- if (signatures[i]->type == TYPEAPPLICATION
- && (!m_strcasecmp(signatures[i]->subtype, "x-pkcs7-signature")
- || !m_strcasecmp(signatures[i]->subtype, "pkcs7-signature")))
- {
- if (crypt_smime_verify_one (signatures[i], s, tempfile) != 0)
- goodsig = 0;
-
- continue;
- }
-
- state_printf (s, _("[-- Warning: "
- "We can't verify %s/%s signatures. --]\n\n"),
- TYPE (signatures[i]), signatures[i]->subtype);
- }
- }
-
- mutt_unlink (tempfile);
-
- b->goodsig = goodsig;
- b->badsig = !goodsig;
-
- /* Now display the signed body */
- state_attach_puts (_("[-- The following data is signed --]\n\n"), s);
-
-
- p_delete(&signatures);
- }
- else
- state_attach_puts (_("[-- Warning: Can't find any signatures. --]\n\n"),
- s);
- }
-
- rc = mutt_body_handler (a, s);
-
- if (s->flags & M_DISPLAY && sigcnt)
- state_attach_puts (_("\n[-- End of signed data --]\n"), s);
-
- return (rc);
-}
projects / apps / madmutt.git / blobdiff