/* this is basically a stripped-down version of the cram-md5 method. */
imap_auth_res_t imap_auth_anon (IMAP_DATA* idata, const char* method)
{
int rc;
if (!mutt_bit_isset (idata->capabilities, AUTH_ANON))
return IMAP_AUTH_UNAVAIL;
if (mutt_account_getuser (&idata->conn->account))
return IMAP_AUTH_FAILURE;
if (idata->conn->account.user[0] != '\0')
return IMAP_AUTH_UNAVAIL;
mutt_message _("Authenticating (anonymous)...");
imap_cmd_start (idata, "AUTHENTICATE ANONYMOUS");
do
rc = imap_cmd_step (idata);
while (rc == IMAP_CMD_CONTINUE);
if (rc != IMAP_CMD_RESPOND)
{
dprint (1, (debugfile, "Invalid response from server.\n"));
goto bail;
}
mutt_socket_write (idata->conn, "ZHVtbXkK\r\n"); /* base64 ("dummy") */
do
rc = imap_cmd_step (idata);
while (rc == IMAP_CMD_CONTINUE);
if (rc != IMAP_CMD_OK)
{
dprint (1, (debugfile, "Error receiving server response.\n"));
goto bail;
}
if (imap_code (idata->buf))
return IMAP_AUTH_SUCCESS;
bail:
mutt_error _("Anonymous authentication failed.");
mutt_sleep (2);
return IMAP_AUTH_FAILURE;
}
/* imap_auth_sasl: Default authenticator if available. */
imap_auth_res_t imap_auth_sasl (IMAP_DATA* idata, const char* method)
{
sasl_conn_t* saslconn;
sasl_interact_t* interaction = NULL;
int rc, irc;
char buf[HUGE_STRING];
const char* mech;
const char *pc = NULL;
unsigned int len, olen;
unsigned char client_start;
if (mutt_sasl_client_new (idata->conn, &saslconn) < 0)
{
dprint (1, (debugfile,
"imap_auth_sasl: Error allocating SASL connection.\n"));
return IMAP_AUTH_FAILURE;
}
rc = SASL_FAIL;
/* If the user hasn't specified a method, use any available */
if (!method)
{
method = idata->capstr;
/* hack for SASL ANONYMOUS support:
* 1. Fetch username. If it's "" or "anonymous" then
* 2. attempt sasl_client_start with only "AUTH=ANONYMOUS" capability
* 3. if sasl_client_start fails, fall through... */
if (mutt_account_getuser (&idata->conn->account))
return IMAP_AUTH_FAILURE;
if (mutt_bit_isset (idata->capabilities, AUTH_ANON) &&
(!idata->conn->account.user[0] ||
!ascii_strncmp (idata->conn->account.user, "anonymous", 9)))
rc = sasl_client_start (saslconn, "AUTH=ANONYMOUS", NULL, &pc, &olen,
&mech);
} else if (!ascii_strcasecmp ("login", method) &&
!strstr (NONULL (idata->capstr), "AUTH=LOGIN"))
/* do not use SASL login for regular IMAP login (#3556) */
return IMAP_AUTH_UNAVAIL;
if (rc != SASL_OK && rc != SASL_CONTINUE)
do
{
rc = sasl_client_start (saslconn, method, &interaction,
&pc, &olen, &mech);
if (rc == SASL_INTERACT)
mutt_sasl_interact (interaction);
}
while (rc == SASL_INTERACT);
client_start = (olen > 0);
if (rc != SASL_OK && rc != SASL_CONTINUE)
{
if (method)
dprint (2, (debugfile, "imap_auth_sasl: %s unavailable\n", method));
else
dprint (1, (debugfile, "imap_auth_sasl: Failure starting authentication exchange. No shared mechanisms?\n"));
/* SASL doesn't support LOGIN, so fall back */
return IMAP_AUTH_UNAVAIL;
}
mutt_message (_("Authenticating (%s)..."), mech);
snprintf (buf, sizeof (buf), "AUTHENTICATE %s", mech);
if (mutt_bit_isset (idata->capabilities, SASL_IR) && client_start)
{
len = mutt_strlen (buf);
buf[len++] = ' ';
if (sasl_encode64 (pc, olen, buf + len, sizeof (buf) - len, &olen) != SASL_OK)
{
dprint (1, (debugfile, "imap_auth_sasl: error base64-encoding client response.\n"));
goto bail;
}
client_start = olen = 0;
}
imap_cmd_start (idata, buf);
irc = IMAP_CMD_CONTINUE;
/* looping protocol */
while (rc == SASL_CONTINUE || olen > 0)
{
do
irc = imap_cmd_step (idata);
while (irc == IMAP_CMD_CONTINUE);
if (irc == IMAP_CMD_BAD || irc == IMAP_CMD_NO)
goto bail;
if (irc == IMAP_CMD_RESPOND)
{
/* Exchange incorrectly returns +\r\n instead of + \r\n */
if (idata->buf[1] == '\0')
{
buf[0] = '\0';
len = 0;
}
else if (sasl_decode64 (idata->buf+2, strlen (idata->buf+2), buf,
LONG_STRING-1, &len) != SASL_OK)
{
dprint (1, (debugfile, "imap_auth_sasl: error base64-decoding server response.\n"));
goto bail;
}
}
/* client-start is only available with the SASL-IR extension, but
* SASL 2.1 seems to want to use it regardless, at least for DIGEST
* fast reauth. Override if the server sent an initial continuation */
if (!client_start || buf[0])
{
do
{
rc = sasl_client_step (saslconn, buf, len, &interaction, &pc, &olen);
if (rc == SASL_INTERACT)
mutt_sasl_interact (interaction);
}
while (rc == SASL_INTERACT);
}
else
client_start = 0;
/* send out response, or line break if none needed */
if (olen)
{
if (sasl_encode64 (pc, olen, buf, sizeof (buf), &olen) != SASL_OK)
{
dprint (1, (debugfile, "imap_auth_sasl: error base64-encoding client response.\n"));
goto bail;
}
}
if (irc == IMAP_CMD_RESPOND)
{
strfcpy (buf + olen, "\r\n", sizeof (buf) - olen);
mutt_socket_write (idata->conn, buf);
}
/* If SASL has errored out, send an abort string to the server */
if (rc < 0)
{
mutt_socket_write (idata->conn, "*\r\n");
dprint (1, (debugfile, "imap_auth_sasl: sasl_client_step error %d\n",rc));
}
olen = 0;
}
while (irc != IMAP_CMD_OK)
if ((irc = imap_cmd_step (idata)) != IMAP_CMD_CONTINUE)
break;
if (rc != SASL_OK)
goto bail;
if (imap_code (idata->buf))
{
mutt_sasl_setup_conn (idata->conn, saslconn);
return IMAP_AUTH_SUCCESS;
}
bail:
sasl_dispose (&saslconn);
if (method)
{
dprint (2, (debugfile, "imap_auth_sasl: %s failed\n", method));
return IMAP_AUTH_UNAVAIL;
}
mutt_error _("SASL authentication failed.");
mutt_sleep(2);
return IMAP_AUTH_FAILURE;
}
int imap_append_message (CONTEXT *ctx, MESSAGE *msg)
{
IMAP_DATA* idata;
FILE *fp;
char buf[LONG_STRING];
char mbox[LONG_STRING];
char mailbox[LONG_STRING];
char internaldate[IMAP_DATELEN];
char imap_flags[SHORT_STRING];
size_t len;
progress_t progressbar;
size_t sent;
int c, last;
IMAP_MBOX mx;
int rc;
idata = (IMAP_DATA*) ctx->data;
if (imap_parse_path (ctx->path, &mx))
return -1;
imap_fix_path (idata, mx.mbox, mailbox, sizeof (mailbox));
if (!*mailbox)
strfcpy (mailbox, "INBOX", sizeof (mailbox));
if ((fp = fopen (msg->path, "r")) == NULL)
{
mutt_perror (msg->path);
goto fail;
}
/* currently we set the \Seen flag on all messages, but probably we
* should scan the message Status header for flag info. Since we're
* already rereading the whole file for length it isn't any more
* expensive (it'd be nice if we had the file size passed in already
* by the code that writes the file, but that's a lot of changes.
* Ideally we'd have a HEADER structure with flag info here... */
for (last = EOF, len = 0; (c = fgetc(fp)) != EOF; last = c)
{
if(c == '\n' && last != '\r')
len++;
len++;
}
rewind (fp);
mutt_progress_init (&progressbar, _("Uploading message..."),
MUTT_PROGRESS_SIZE, NetInc, len);
imap_munge_mbox_name (idata, mbox, sizeof (mbox), mailbox);
imap_make_date (internaldate, msg->received);
imap_flags[0] = imap_flags[1] = 0;
if (msg->flags.read)
safe_strcat (imap_flags, sizeof (imap_flags), " \\Seen");
if (msg->flags.replied)
safe_strcat (imap_flags, sizeof (imap_flags), " \\Answered");
if (msg->flags.flagged)
safe_strcat (imap_flags, sizeof (imap_flags), " \\Flagged");
if (msg->flags.draft)
safe_strcat (imap_flags, sizeof (imap_flags), " \\Draft");
snprintf (buf, sizeof (buf), "APPEND %s (%s) \"%s\" {%lu}", mbox,
imap_flags + 1,
internaldate,
(unsigned long) len);
imap_cmd_start (idata, buf);
do
rc = imap_cmd_step (idata);
while (rc == IMAP_CMD_CONTINUE);
if (rc != IMAP_CMD_RESPOND)
{
char *pc;
dprint (1, (debugfile, "imap_append_message(): command failed: %s\n",
idata->buf));
pc = idata->buf + SEQLEN;
SKIPWS (pc);
pc = imap_next_word (pc);
mutt_error ("%s", pc);
mutt_sleep (1);
safe_fclose (&fp);
goto fail;
}
for (last = EOF, sent = len = 0; (c = fgetc(fp)) != EOF; last = c)
{
if (c == '\n' && last != '\r')
buf[len++] = '\r';
buf[len++] = c;
if (len > sizeof(buf) - 3)
{
sent += len;
flush_buffer(buf, &len, idata->conn);
mutt_progress_update (&progressbar, sent, -1);
}
}
if (len)
flush_buffer(buf, &len, idata->conn);
mutt_socket_write (idata->conn, "\r\n");
safe_fclose (&fp);
do
rc = imap_cmd_step (idata);
while (rc == IMAP_CMD_CONTINUE);
if (!imap_code (idata->buf))
{
char *pc;
dprint (1, (debugfile, "imap_append_message(): command failed: %s\n",
idata->buf));
pc = idata->buf + SEQLEN;
SKIPWS (pc);
pc = imap_next_word (pc);
mutt_error ("%s", pc);
mutt_sleep (1);
goto fail;
}
FREE (&mx.mbox);
return 0;
fail:
FREE (&mx.mbox);
return -1;
}
/* imap_read_headers:
* Changed to read many headers instead of just one. It will return the
* msgno of the last message read. It will return a value other than
* msgend if mail comes in while downloading headers (in theory).
*/
int imap_read_headers (IMAP_DATA* idata, int msgbegin, int msgend)
{
CONTEXT* ctx;
char *hdrreq = NULL;
FILE *fp;
char tempfile[_POSIX_PATH_MAX];
int msgno, idx = msgbegin - 1;
IMAP_HEADER h;
IMAP_STATUS* status;
int rc, mfhrc, oldmsgcount;
int fetchlast = 0;
int maxuid = 0;
static const char * const want_headers = "DATE FROM SUBJECT TO CC MESSAGE-ID REFERENCES CONTENT-TYPE CONTENT-DESCRIPTION IN-REPLY-TO REPLY-TO LINES LIST-POST X-LABEL";
progress_t progress;
int retval = -1;
#if USE_HCACHE
char buf[LONG_STRING];
unsigned int *uid_validity = NULL;
unsigned int *puidnext = NULL;
unsigned int uidnext = 0;
int evalhc = 0;
#endif /* USE_HCACHE */
ctx = idata->ctx;
if (mutt_bit_isset (idata->capabilities,IMAP4REV1))
{
safe_asprintf (&hdrreq, "BODY.PEEK[HEADER.FIELDS (%s%s%s)]",
want_headers, ImapHeaders ? " " : "", NONULL (ImapHeaders));
}
else if (mutt_bit_isset (idata->capabilities,IMAP4))
{
safe_asprintf (&hdrreq, "RFC822.HEADER.LINES (%s%s%s)",
want_headers, ImapHeaders ? " " : "", NONULL (ImapHeaders));
}
else
{ /* Unable to fetch headers for lower versions */
mutt_error _("Unable to fetch headers from this IMAP server version.");
mutt_sleep (2); /* pause a moment to let the user see the error */
goto error_out_0;
}
/* instead of downloading all headers and then parsing them, we parse them
* as they come in. */
mutt_mktemp (tempfile, sizeof (tempfile));
if (!(fp = safe_fopen (tempfile, "w+")))
{
mutt_error (_("Could not create temporary file %s"), tempfile);
mutt_sleep (2);
goto error_out_0;
}
unlink (tempfile);
/* make sure context has room to hold the mailbox */
while ((msgend) >= idata->ctx->hdrmax)
mx_alloc_memory (idata->ctx);
oldmsgcount = ctx->msgcount;
idata->reopen &= ~(IMAP_REOPEN_ALLOW|IMAP_NEWMAIL_PENDING);
idata->newMailCount = 0;
#if USE_HCACHE
idata->hcache = imap_hcache_open (idata, NULL);
if (idata->hcache && !msgbegin)
{
uid_validity = mutt_hcache_fetch_raw (idata->hcache, "/UIDVALIDITY", imap_hcache_keylen);
puidnext = mutt_hcache_fetch_raw (idata->hcache, "/UIDNEXT", imap_hcache_keylen);
if (puidnext)
{
uidnext = *puidnext;
FREE (&puidnext);
}
if (uid_validity && uidnext && *uid_validity == idata->uid_validity)
evalhc = 1;
FREE (&uid_validity);
}
if (evalhc)
{
/* L10N:
Comparing the cached data with the IMAP server's data */
mutt_progress_init (&progress, _("Evaluating cache..."),
MUTT_PROGRESS_MSG, ReadInc, msgend + 1);
snprintf (buf, sizeof (buf),
"UID FETCH 1:%u (UID FLAGS)", uidnext - 1);
imap_cmd_start (idata, buf);
rc = IMAP_CMD_CONTINUE;
for (msgno = msgbegin; rc == IMAP_CMD_CONTINUE; msgno++)
{
mutt_progress_update (&progress, msgno + 1, -1);
memset (&h, 0, sizeof (h));
h.data = safe_calloc (1, sizeof (IMAP_HEADER_DATA));
do
{
mfhrc = 0;
rc = imap_cmd_step (idata);
if (rc != IMAP_CMD_CONTINUE)
{
imap_free_header_data (&h.data);
break;
}
/* hole in the header cache */
if (!evalhc)
continue;
if ((mfhrc = msg_fetch_header (ctx, &h, idata->buf, NULL)) == -1)
continue;
else if (mfhrc < 0)
{
imap_free_header_data (&h.data);
break;
}
if (!h.data->uid)
{
dprint (2, (debugfile, "imap_read_headers: skipping hcache FETCH "
"response for unknown message number %d\n", h.sid));
mfhrc = -1;
continue;
}
idx++;
ctx->hdrs[idx] = imap_hcache_get (idata, h.data->uid);
if (ctx->hdrs[idx])
{
ctx->hdrs[idx]->index = idx;
/* messages which have not been expunged are ACTIVE (borrowed from mh
* folders) */
ctx->hdrs[idx]->active = 1;
ctx->hdrs[idx]->read = h.data->read;
ctx->hdrs[idx]->old = h.data->old;
ctx->hdrs[idx]->deleted = h.data->deleted;
ctx->hdrs[idx]->flagged = h.data->flagged;
ctx->hdrs[idx]->replied = h.data->replied;
ctx->hdrs[idx]->changed = h.data->changed;
/* ctx->hdrs[msgno]->received is restored from mutt_hcache_restore */
ctx->hdrs[idx]->data = (void *) (h.data);
ctx->msgcount++;
ctx->size += ctx->hdrs[idx]->content->length;
}
else
{
/* bad header in the cache, we'll have to refetch. */
dprint (3, (debugfile, "bad cache entry at %d, giving up\n", h.sid - 1));
imap_free_header_data(&h.data);
evalhc = 0;
idx--;
}
}
while (rc != IMAP_CMD_OK && mfhrc == -1);
if (rc == IMAP_CMD_OK)
break;
if ((mfhrc < -1) || ((rc != IMAP_CMD_CONTINUE) && (rc != IMAP_CMD_OK)))
{
imap_free_header_data (&h.data);
imap_hcache_close (idata);
goto error_out_1;
}
}
/* could also look for first null header in case hcache is holey */
msgbegin = ctx->msgcount;
}
#endif /* USE_HCACHE */
mutt_progress_init (&progress, _("Fetching message headers..."),
MUTT_PROGRESS_MSG, ReadInc, msgend + 1);
for (msgno = msgbegin; msgno <= msgend ; msgno++)
{
mutt_progress_update (&progress, msgno + 1, -1);
/* we may get notification of new mail while fetching headers */
if (msgno + 1 > fetchlast)
{
char *cmd;
fetchlast = msgend + 1;
safe_asprintf (&cmd, "FETCH %d:%d (UID FLAGS INTERNALDATE RFC822.SIZE %s)",
msgno + 1, fetchlast, hdrreq);
imap_cmd_start (idata, cmd);
FREE (&cmd);
}
rewind (fp);
memset (&h, 0, sizeof (h));
h.data = safe_calloc (1, sizeof (IMAP_HEADER_DATA));
/* this DO loop does two things:
* 1. handles untagged messages, so we can try again on the same msg
* 2. fetches the tagged response at the end of the last message.
*/
do
{
mfhrc = 0;
rc = imap_cmd_step (idata);
if (rc != IMAP_CMD_CONTINUE)
break;
if ((mfhrc = msg_fetch_header (ctx, &h, idata->buf, fp)) == -1)
continue;
else if (mfhrc < 0)
break;
if (!ftello (fp))
{
dprint (2, (debugfile, "msg_fetch_header: ignoring fetch response with no body\n"));
mfhrc = -1;
msgend--;
continue;
}
/* make sure we don't get remnants from older larger message headers */
fputs ("\n\n", fp);
idx++;
if (idx > msgend)
{
dprint (1, (debugfile, "imap_read_headers: skipping FETCH response for "
"unknown message number %d\n", h.sid));
mfhrc = -1;
idx--;
continue;
}
/* May receive FLAGS updates in a separate untagged response (#2935) */
if (idx < ctx->msgcount)
{
dprint (2, (debugfile, "imap_read_headers: message %d is not new\n",
h.sid));
idx--;
continue;
}
ctx->hdrs[idx] = mutt_new_header ();
ctx->hdrs[idx]->index = h.sid - 1;
/* messages which have not been expunged are ACTIVE (borrowed from mh
* folders) */
ctx->hdrs[idx]->active = 1;
ctx->hdrs[idx]->read = h.data->read;
ctx->hdrs[idx]->old = h.data->old;
ctx->hdrs[idx]->deleted = h.data->deleted;
ctx->hdrs[idx]->flagged = h.data->flagged;
ctx->hdrs[idx]->replied = h.data->replied;
ctx->hdrs[idx]->changed = h.data->changed;
ctx->hdrs[idx]->received = h.received;
ctx->hdrs[idx]->data = (void *) (h.data);
if (maxuid < h.data->uid)
maxuid = h.data->uid;
rewind (fp);
/* NOTE: if Date: header is missing, mutt_read_rfc822_header depends
* on h.received being set */
ctx->hdrs[idx]->env = mutt_read_rfc822_header (fp, ctx->hdrs[idx],
0, 0);
/* content built as a side-effect of mutt_read_rfc822_header */
ctx->hdrs[idx]->content->length = h.content_length;
ctx->size += h.content_length;
#if USE_HCACHE
imap_hcache_put (idata, ctx->hdrs[idx]);
#endif /* USE_HCACHE */
ctx->msgcount++;
}
while ((rc != IMAP_CMD_OK) && ((mfhrc == -1) ||
((msgno + 1) >= fetchlast)));
if ((mfhrc < -1) || ((rc != IMAP_CMD_CONTINUE) && (rc != IMAP_CMD_OK)))
{
imap_free_header_data (&h.data);
#if USE_HCACHE
imap_hcache_close (idata);
#endif
goto error_out_1;
}
/* in case we get new mail while fetching the headers */
if (idata->reopen & IMAP_NEWMAIL_PENDING)
{
msgend = idata->newMailCount - 1;
while ((msgend) >= ctx->hdrmax)
mx_alloc_memory (ctx);
idata->reopen &= ~IMAP_NEWMAIL_PENDING;
idata->newMailCount = 0;
}
}
if (maxuid && (status = imap_mboxcache_get (idata, idata->mailbox, 0)) &&
(status->uidnext < maxuid + 1))
status->uidnext = maxuid + 1;
#if USE_HCACHE
mutt_hcache_store_raw (idata->hcache, "/UIDVALIDITY", &idata->uid_validity,
sizeof (idata->uid_validity), imap_hcache_keylen);
if (maxuid && idata->uidnext < maxuid + 1)
{
dprint (2, (debugfile, "Overriding UIDNEXT: %u -> %u\n", idata->uidnext, maxuid + 1));
idata->uidnext = maxuid + 1;
}
if (idata->uidnext > 1)
mutt_hcache_store_raw (idata->hcache, "/UIDNEXT", &idata->uidnext,
sizeof (idata->uidnext), imap_hcache_keylen);
imap_hcache_close (idata);
#endif /* USE_HCACHE */
if (ctx->msgcount > oldmsgcount)
{
mx_alloc_memory(ctx);
mx_update_context (ctx, ctx->msgcount - oldmsgcount);
}
idata->reopen |= IMAP_REOPEN_ALLOW;
retval = msgend;
error_out_1:
safe_fclose (&fp);
error_out_0:
FREE (&hdrreq);
return retval;
}
int imap_fetch_message (CONTEXT *ctx, MESSAGE *msg, int msgno)
{
IMAP_DATA* idata;
HEADER* h;
ENVELOPE* newenv;
char buf[LONG_STRING];
char path[_POSIX_PATH_MAX];
char *pc;
long bytes;
progress_t progressbar;
int uid;
int cacheno;
IMAP_CACHE *cache;
int read;
int rc;
/* Sam's weird courier server returns an OK response even when FETCH
* fails. Thanks Sam. */
short fetched = 0;
idata = (IMAP_DATA*) ctx->data;
h = ctx->hdrs[msgno];
if ((msg->fp = msg_cache_get (idata, h)))
{
if (HEADER_DATA(h)->parsed)
return 0;
else
goto parsemsg;
}
/* we still do some caching even if imap_cachedir is unset */
/* see if we already have the message in our cache */
cacheno = HEADER_DATA(h)->uid % IMAP_CACHE_LEN;
cache = &idata->cache[cacheno];
if (cache->path)
{
/* don't treat cache errors as fatal, just fall back. */
if (cache->uid == HEADER_DATA(h)->uid &&
(msg->fp = fopen (cache->path, "r")))
return 0;
else
{
unlink (cache->path);
FREE (&cache->path);
}
}
if (!isendwin())
mutt_message _("Fetching message...");
if (!(msg->fp = msg_cache_put (idata, h)))
{
cache->uid = HEADER_DATA(h)->uid;
mutt_mktemp (path, sizeof (path));
cache->path = safe_strdup (path);
if (!(msg->fp = safe_fopen (path, "w+")))
{
FREE (&cache->path);
return -1;
}
}
/* mark this header as currently inactive so the command handler won't
* also try to update it. HACK until all this code can be moved into the
* command handler */
h->active = 0;
snprintf (buf, sizeof (buf), "UID FETCH %u %s", HEADER_DATA(h)->uid,
(mutt_bit_isset (idata->capabilities, IMAP4REV1) ?
(option (OPTIMAPPEEK) ? "BODY.PEEK[]" : "BODY[]") :
"RFC822"));
imap_cmd_start (idata, buf);
do
{
if ((rc = imap_cmd_step (idata)) != IMAP_CMD_CONTINUE)
break;
pc = idata->buf;
pc = imap_next_word (pc);
pc = imap_next_word (pc);
if (!ascii_strncasecmp ("FETCH", pc, 5))
{
while (*pc)
{
pc = imap_next_word (pc);
if (pc[0] == '(')
pc++;
if (ascii_strncasecmp ("UID", pc, 3) == 0)
{
pc = imap_next_word (pc);
uid = atoi (pc);
if (uid != HEADER_DATA(h)->uid)
mutt_error (_("The message index is incorrect. Try reopening the mailbox."));
}
else if ((ascii_strncasecmp ("RFC822", pc, 6) == 0) ||
(ascii_strncasecmp ("BODY[]", pc, 6) == 0))
{
pc = imap_next_word (pc);
if (imap_get_literal_count(pc, &bytes) < 0)
{
imap_error ("imap_fetch_message()", buf);
goto bail;
}
mutt_progress_init (&progressbar, _("Fetching message..."),
MUTT_PROGRESS_SIZE, NetInc, bytes);
if (imap_read_literal (msg->fp, idata, bytes, &progressbar) < 0)
goto bail;
/* pick up trailing line */
if ((rc = imap_cmd_step (idata)) != IMAP_CMD_CONTINUE)
goto bail;
pc = idata->buf;
fetched = 1;
}
/* UW-IMAP will provide a FLAGS update here if the FETCH causes a
* change (eg from \Unseen to \Seen).
* Uncommitted changes in mutt take precedence. If we decide to
* incrementally update flags later, this won't stop us syncing */
else if ((ascii_strncasecmp ("FLAGS", pc, 5) == 0) && !h->changed)
{
if ((pc = imap_set_flags (idata, h, pc)) == NULL)
goto bail;
}
}
}
}
while (rc == IMAP_CMD_CONTINUE);
/* see comment before command start. */
h->active = 1;
fflush (msg->fp);
if (ferror (msg->fp))
{
mutt_perror (cache->path);
goto bail;
}
if (rc != IMAP_CMD_OK)
goto bail;
if (!fetched || !imap_code (idata->buf))
goto bail;
msg_cache_commit (idata, h);
parsemsg:
/* Update the header information. Previously, we only downloaded a
* portion of the headers, those required for the main display.
*/
rewind (msg->fp);
/* It may be that the Status header indicates a message is read, but the
* IMAP server doesn't know the message has been \Seen. So we capture
* the server's notion of 'read' and if it differs from the message info
* picked up in mutt_read_rfc822_header, we mark the message (and context
* changed). Another possibility: ignore Status on IMAP?*/
read = h->read;
newenv = mutt_read_rfc822_header (msg->fp, h, 0, 0);
mutt_merge_envelopes(h->env, &newenv);
/* see above. We want the new status in h->read, so we unset it manually
* and let mutt_set_flag set it correctly, updating context. */
if (read != h->read)
{
h->read = read;
mutt_set_flag (ctx, h, MUTT_NEW, read);
}
h->lines = 0;
fgets (buf, sizeof (buf), msg->fp);
while (!feof (msg->fp))
{
h->lines++;
fgets (buf, sizeof (buf), msg->fp);
}
h->content->length = ftell (msg->fp) - h->content->offset;
/* This needs to be done in case this is a multipart message */
#if defined(HAVE_PGP) || defined(HAVE_SMIME)
h->security = crypt_query (h->content);
#endif
mutt_clear_error();
rewind (msg->fp);
HEADER_DATA(h)->parsed = 1;
return 0;
bail:
safe_fclose (&msg->fp);
imap_cache_del (idata, h);
if (cache->path)
{
unlink (cache->path);
FREE (&cache->path);
}
return -1;
}
/* imap_auth_cram_md5: AUTH=CRAM-MD5 support. */
ImapResult
imap_auth_cram(ImapMboxHandle* handle)
{
char ibuf[LONG_STRING*2], obuf[LONG_STRING];
unsigned char hmac_response[MD5_DIGEST_LEN];
unsigned cmdno;
int len, rc, ok;
char *user = NULL, *pass = NULL;
if (!imap_mbox_handle_can_do(handle, IMCAP_ACRAM_MD5))
return IMAP_AUTH_UNAVAIL;
ok = 0;
if(!ok && handle->user_cb)
handle->user_cb(IME_GET_USER_PASS, handle->user_arg,
"CRAM-MD5", &user, &pass, &ok);
if(!ok || user == NULL || pass == NULL) {
imap_mbox_handle_set_msg(handle, "Authentication cancelled");
return IMAP_AUTH_CANCELLED;
}
/* start the interaction */
if(imap_cmd_start(handle, "AUTHENTICATE CRAM-MD5", &cmdno) <0)
return IMAP_AUTH_FAILURE;
/* From RFC 2195:
* The data encoded in the first ready response contains a presumptively
* arbitrary string of random digits, a timestamp, and the fully-qualified
* primary host name of the server. The syntax of the unencoded form must
* correspond to that of an RFC 822 'msg-id' [RFC822] as described in [POP3].
*/
imap_handle_flush(handle);
do
rc = imap_cmd_step(handle, cmdno);
while(rc == IMR_UNTAGGED);
if (rc != IMR_RESPOND) {
g_warning("cram-md5: unexpected response:\n");
return IMAP_AUTH_FAILURE;
}
imap_mbox_gets(handle, ibuf, sizeof(ibuf)); /* check error */
if ((len = lit_conv_from_base64(obuf, ibuf)) <0) {
g_warning("Error decoding base64 response(%s), digit=%d:%d[%c]).\n",
ibuf, len, ibuf[-len-1],ibuf[-len-1]);
return IMAP_AUTH_FAILURE;
}
obuf[len] = '\0';
/* The client makes note of the data and then responds with a string
* consisting of the user name, a space, and a 'digest'. The latter is
* computed by applying the keyed MD5 algorithm from [KEYED-MD5] where the
* key is a shared secret and the digested text is the timestamp (including
* angle-brackets).
*
* Note: The user name shouldn't be quoted. Since the digest can't contain
* spaces, there is no ambiguity. Some servers get this wrong, we'll work
* around them when the bug report comes in. Until then, we'll remain
* blissfully RFC-compliant.
*/
hmac_md5 (pass, obuf, hmac_response);
g_snprintf (obuf, sizeof (obuf),
"%s %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
user,
hmac_response[0], hmac_response[1], hmac_response[2], hmac_response[3],
hmac_response[4], hmac_response[5], hmac_response[6], hmac_response[7],
hmac_response[8], hmac_response[9], hmac_response[10], hmac_response[11],
hmac_response[12], hmac_response[13], hmac_response[14], hmac_response[15]);
/* XXX - ibuf must be long enough to store the base64 encoding of obuf,
* plus the additional debris
*/
lit_conv_to_base64(ibuf, obuf, strlen (obuf), sizeof(ibuf)-2);
strncat (ibuf, "\r\n", sizeof (ibuf) - strlen(ibuf) - 1);
imap_handle_write(handle, ibuf, strlen(ibuf));
imap_handle_flush(handle);
g_free(user); g_free(pass); /* FIXME: clean passwd first */
do
rc = imap_cmd_step (handle, cmdno);
while (rc == IMR_UNTAGGED);
return rc == IMR_OK ? IMAP_SUCCESS : IMAP_AUTH_FAILURE;
}
/**
* imap_auth_gss - GSS Authentication support
* @param adata Imap Account data
* @param method Name of this authentication method
* @retval enum Result, e.g. #IMAP_AUTH_SUCCESS
*/
enum ImapAuthRes imap_auth_gss(struct ImapAccountData *adata, const char *method)
{
gss_buffer_desc request_buf, send_token;
gss_buffer_t sec_token;
gss_name_t target_name;
gss_ctx_id_t context;
gss_OID mech_name;
char server_conf_flags;
gss_qop_t quality;
int cflags;
OM_uint32 maj_stat, min_stat;
unsigned long buf_size;
int rc, retval = IMAP_AUTH_FAILURE;
if (!(adata->capabilities & IMAP_CAP_AUTH_GSSAPI))
return IMAP_AUTH_UNAVAIL;
if (mutt_account_getuser(&adata->conn->account) < 0)
return IMAP_AUTH_FAILURE;
struct Buffer *buf1 = mutt_buffer_pool_get();
struct Buffer *buf2 = mutt_buffer_pool_get();
/* get an IMAP service ticket for the server */
mutt_buffer_printf(buf1, "imap@%s", adata->conn->account.host);
request_buf.value = buf1->data;
request_buf.length = mutt_buffer_len(buf1);
maj_stat = gss_import_name(&min_stat, &request_buf, gss_nt_service_name, &target_name);
if (maj_stat != GSS_S_COMPLETE)
{
mutt_debug(LL_DEBUG2, "Couldn't get service name for [%s]\n", buf1);
retval = IMAP_AUTH_UNAVAIL;
goto cleanup;
}
else if (C_DebugLevel >= 2)
{
gss_display_name(&min_stat, target_name, &request_buf, &mech_name);
mutt_debug(LL_DEBUG2, "Using service name [%s]\n", (char *) request_buf.value);
gss_release_buffer(&min_stat, &request_buf);
}
/* Acquire initial credentials - without a TGT GSSAPI is UNAVAIL */
sec_token = GSS_C_NO_BUFFER;
context = GSS_C_NO_CONTEXT;
/* build token */
maj_stat = gss_init_sec_context(&min_stat, GSS_C_NO_CREDENTIAL, &context, target_name,
GSS_C_NO_OID, GSS_C_MUTUAL_FLAG | GSS_C_SEQUENCE_FLAG,
0, GSS_C_NO_CHANNEL_BINDINGS, sec_token, NULL,
&send_token, (unsigned int *) &cflags, NULL);
if ((maj_stat != GSS_S_COMPLETE) && (maj_stat != GSS_S_CONTINUE_NEEDED))
{
print_gss_error(maj_stat, min_stat);
mutt_debug(LL_DEBUG1, "Error acquiring credentials - no TGT?\n");
gss_release_name(&min_stat, &target_name);
retval = IMAP_AUTH_UNAVAIL;
goto cleanup;
}
/* now begin login */
mutt_message(_("Authenticating (GSSAPI)..."));
imap_cmd_start(adata, "AUTHENTICATE GSSAPI");
/* expect a null continuation response ("+") */
do
rc = imap_cmd_step(adata);
while (rc == IMAP_CMD_CONTINUE);
if (rc != IMAP_CMD_RESPOND)
{
mutt_debug(LL_DEBUG2, "Invalid response from server: %s\n", buf1);
gss_release_name(&min_stat, &target_name);
goto bail;
}
/* now start the security context initialisation loop... */
mutt_debug(LL_DEBUG2, "Sending credentials\n");
mutt_b64_buffer_encode(buf1, send_token.value, send_token.length);
gss_release_buffer(&min_stat, &send_token);
mutt_buffer_addstr(buf1, "\r\n");
mutt_socket_send(adata->conn, mutt_b2s(buf1));
while (maj_stat == GSS_S_CONTINUE_NEEDED)
{
/* Read server data */
do
rc = imap_cmd_step(adata);
while (rc == IMAP_CMD_CONTINUE);
if (rc != IMAP_CMD_RESPOND)
{
mutt_debug(LL_DEBUG1, "#1 Error receiving server response\n");
gss_release_name(&min_stat, &target_name);
goto bail;
}
if (mutt_b64_buffer_decode(buf2, adata->buf + 2) < 0)
{
mutt_debug(LL_DEBUG1, "Invalid base64 server response\n");
gss_release_name(&min_stat, &target_name);
goto err_abort_cmd;
}
request_buf.value = buf2->data;
request_buf.length = mutt_buffer_len(buf2);
sec_token = &request_buf;
/* Write client data */
maj_stat = gss_init_sec_context(
&min_stat, GSS_C_NO_CREDENTIAL, &context, target_name, GSS_C_NO_OID,
GSS_C_MUTUAL_FLAG | GSS_C_SEQUENCE_FLAG, 0, GSS_C_NO_CHANNEL_BINDINGS,
sec_token, NULL, &send_token, (unsigned int *) &cflags, NULL);
if ((maj_stat != GSS_S_COMPLETE) && (maj_stat != GSS_S_CONTINUE_NEEDED))
{
print_gss_error(maj_stat, min_stat);
mutt_debug(LL_DEBUG1, "Error exchanging credentials\n");
gss_release_name(&min_stat, &target_name);
goto err_abort_cmd;
}
mutt_b64_buffer_encode(buf1, send_token.value, send_token.length);
gss_release_buffer(&min_stat, &send_token);
mutt_buffer_addstr(buf1, "\r\n");
mutt_socket_send(adata->conn, mutt_b2s(buf1));
}
gss_release_name(&min_stat, &target_name);
/* get security flags and buffer size */
do
rc = imap_cmd_step(adata);
while (rc == IMAP_CMD_CONTINUE);
if (rc != IMAP_CMD_RESPOND)
{
mutt_debug(LL_DEBUG1, "#2 Error receiving server response\n");
goto bail;
}
if (mutt_b64_buffer_decode(buf2, adata->buf + 2) < 0)
{
mutt_debug(LL_DEBUG1, "Invalid base64 server response\n");
goto err_abort_cmd;
}
request_buf.value = buf2->data;
request_buf.length = mutt_buffer_len(buf2);
maj_stat = gss_unwrap(&min_stat, context, &request_buf, &send_token, &cflags, &quality);
if (maj_stat != GSS_S_COMPLETE)
{
print_gss_error(maj_stat, min_stat);
mutt_debug(LL_DEBUG2, "Couldn't unwrap security level data\n");
gss_release_buffer(&min_stat, &send_token);
goto err_abort_cmd;
}
mutt_debug(LL_DEBUG2, "Credential exchange complete\n");
/* first octet is security levels supported. We want NONE */
server_conf_flags = ((char *) send_token.value)[0];
if (!(((char *) send_token.value)[0] & GSS_AUTH_P_NONE))
{
mutt_debug(LL_DEBUG2, "Server requires integrity or privacy\n");
gss_release_buffer(&min_stat, &send_token);
goto err_abort_cmd;
}
/* we don't care about buffer size if we don't wrap content. But here it is */
((char *) send_token.value)[0] = '\0';
buf_size = ntohl(*((long *) send_token.value));
gss_release_buffer(&min_stat, &send_token);
mutt_debug(LL_DEBUG2, "Unwrapped security level flags: %c%c%c\n",
(server_conf_flags & GSS_AUTH_P_NONE) ? 'N' : '-',
(server_conf_flags & GSS_AUTH_P_INTEGRITY) ? 'I' : '-',
(server_conf_flags & GSS_AUTH_P_PRIVACY) ? 'P' : '-');
mutt_debug(LL_DEBUG2, "Maximum GSS token size is %ld\n", buf_size);
/* agree to terms (hack!) */
buf_size = htonl(buf_size); /* not relevant without integrity/privacy */
mutt_buffer_reset(buf1);
mutt_buffer_addch(buf1, GSS_AUTH_P_NONE);
mutt_buffer_addstr_n(buf1, ((char *) &buf_size) + 1, 3);
/* server decides if principal can log in as user */
mutt_buffer_addstr(buf1, adata->conn->account.user);
request_buf.value = buf1->data;
request_buf.length = mutt_buffer_len(buf1);
maj_stat = gss_wrap(&min_stat, context, 0, GSS_C_QOP_DEFAULT, &request_buf,
&cflags, &send_token);
if (maj_stat != GSS_S_COMPLETE)
{
mutt_debug(LL_DEBUG2, "Error creating login request\n");
goto err_abort_cmd;
}
mutt_b64_buffer_encode(buf1, send_token.value, send_token.length);
mutt_debug(LL_DEBUG2, "Requesting authorisation as %s\n", adata->conn->account.user);
mutt_buffer_addstr(buf1, "\r\n");
mutt_socket_send(adata->conn, mutt_b2s(buf1));
/* Joy of victory or agony of defeat? */
do
rc = imap_cmd_step(adata);
while (rc == IMAP_CMD_CONTINUE);
if (rc == IMAP_CMD_RESPOND)
{
mutt_debug(LL_DEBUG1, "Unexpected server continuation request\n");
goto err_abort_cmd;
}
if (imap_code(adata->buf))
{
/* flush the security context */
mutt_debug(LL_DEBUG2, "Releasing GSS credentials\n");
maj_stat = gss_delete_sec_context(&min_stat, &context, &send_token);
if (maj_stat != GSS_S_COMPLETE)
mutt_debug(LL_DEBUG1, "Error releasing credentials\n");
/* send_token may contain a notification to the server to flush
* credentials. RFC1731 doesn't specify what to do, and since this
* support is only for authentication, we'll assume the server knows
* enough to flush its own credentials */
gss_release_buffer(&min_stat, &send_token);
retval = IMAP_AUTH_SUCCESS;
goto cleanup;
}
else
goto bail;
err_abort_cmd:
mutt_socket_send(adata->conn, "*\r\n");
do
rc = imap_cmd_step(adata);
while (rc == IMAP_CMD_CONTINUE);
bail:
mutt_error(_("GSSAPI authentication failed"));
retval = IMAP_AUTH_FAILURE;
cleanup:
mutt_buffer_pool_release(&buf1);
mutt_buffer_pool_release(&buf2);
return retval;
}
static int browse_get_namespace (IMAP_DATA* idata, char* nsbuf, int nsblen,
IMAP_NAMESPACE_INFO* nsi, int nsilen, int* nns)
{
char *s;
int n;
char ns[LONG_STRING];
char delim = '/';
int type;
int nsbused = 0;
int rc;
*nns = 0;
nsbuf[nsblen-1] = '\0';
imap_cmd_start (idata, "NAMESPACE");
do
{
if ((rc = imap_cmd_step (idata)) != IMAP_CMD_CONTINUE)
break;
s = imap_next_word (idata->cmd.buf);
if (ascii_strncasecmp ("NAMESPACE", s, 9) == 0)
{
/* There are three sections to the response, User, Other, Shared,
* and maybe more by extension */
for (type = IMAP_NS_PERSONAL; *s; type++)
{
s = imap_next_word (s);
if (*s && ascii_strncmp (s, "NIL", 3))
{
s++;
while (*s && *s != ')')
{
s++; /* skip ( */
/* copy namespace */
n = 0;
delim = '\0';
if (*s == '\"')
{
s++;
while (*s && *s != '\"')
{
if (*s == '\\')
s++;
ns[n++] = *s;
s++;
}
/* skip trailing ", if we found one, otherwise
* imap_next_word will get confused */
if (*s)
s++;
}
else
while (*s && !ISSPACE (*s))
{
ns[n++] = *s;
s++;
}
ns[n] = '\0';
/* delim? */
s = imap_next_word (s);
/* delimiter is meaningless if namespace is "". Why does
* Cyrus provide one?! */
if (n && *s && *s == '\"')
{
if (s[1] && s[2] == '\"')
delim = s[1];
else if (s[1] && s[1] == '\\' && s[2] && s[3] == '\"')
delim = s[2];
}
/* skip "" namespaces, they are already listed at the root */
if ((ns[0] != '\0') && (nsbused < nsblen) && (*nns < nsilen))
{
dprint (3, (debugfile, "browse_get_namespace: adding %s\n", ns));
nsi->type = type;
/* Cyrus doesn't append the delimiter to the namespace,
* but UW-IMAP does. We'll strip it here and add it back
* as if it were a normal directory, from the browser */
if (n && (ns[n-1] == delim))
ns[--n] = '\0';
strncpy (nsbuf+nsbused,ns,nsblen-nsbused-1);
nsi->prefix = nsbuf+nsbused;
nsbused += n+1;
nsi->delim = delim;
nsi++;
(*nns)++;
}
while (*s && *s != ')')
s++;
if (*s)
s++;
}
}
}
}
}
while (rc == IMAP_CMD_CONTINUE);
if (rc != IMAP_CMD_OK)
return -1;
return 0;
}
/* imap_auth_gss: AUTH=GSSAPI support. */
imap_auth_res_t imap_auth_gss (IMAP_DATA* idata, const char* method)
{
gss_buffer_desc request_buf, send_token;
gss_buffer_t sec_token;
gss_name_t target_name;
gss_ctx_id_t context;
#ifdef DEBUG
gss_OID mech_name;
#endif
gss_qop_t quality;
int cflags;
OM_uint32 maj_stat, min_stat;
char buf1[GSS_BUFSIZE], buf2[GSS_BUFSIZE], server_conf_flags;
unsigned long buf_size;
int rc;
if (!mutt_bit_isset (idata->capabilities, AGSSAPI))
return IMAP_AUTH_UNAVAIL;
if (mutt_account_getuser (&idata->conn->account))
return IMAP_AUTH_FAILURE;
/* get an IMAP service ticket for the server */
snprintf (buf1, sizeof (buf1), "imap@%s", idata->conn->account.host);
request_buf.value = buf1;
request_buf.length = strlen (buf1) + 1;
maj_stat = gss_import_name (&min_stat, &request_buf, gss_nt_service_name,
&target_name);
if (maj_stat != GSS_S_COMPLETE)
{
dprint (2, (debugfile, "Couldn't get service name for [%s]\n", buf1));
return IMAP_AUTH_UNAVAIL;
}
#ifdef DEBUG
else if (debuglevel >= 2)
{
maj_stat = gss_display_name (&min_stat, target_name, &request_buf,
&mech_name);
dprint (2, (debugfile, "Using service name [%s]\n",
(char*) request_buf.value));
maj_stat = gss_release_buffer (&min_stat, &request_buf);
}
#endif
/* Acquire initial credentials - without a TGT GSSAPI is UNAVAIL */
sec_token = GSS_C_NO_BUFFER;
context = GSS_C_NO_CONTEXT;
/* build token */
maj_stat = gss_init_sec_context (&min_stat, GSS_C_NO_CREDENTIAL, &context,
target_name, GSS_C_NO_OID, GSS_C_MUTUAL_FLAG | GSS_C_SEQUENCE_FLAG, 0,
GSS_C_NO_CHANNEL_BINDINGS, sec_token, NULL, &send_token,
(unsigned int*) &cflags, NULL);
if (maj_stat != GSS_S_COMPLETE && maj_stat != GSS_S_CONTINUE_NEEDED)
{
print_gss_error(maj_stat, min_stat);
dprint (1, (debugfile, "Error acquiring credentials - no TGT?\n"));
gss_release_name (&min_stat, &target_name);
return IMAP_AUTH_UNAVAIL;
}
/* now begin login */
mutt_message _("Authenticating (GSSAPI)...");
imap_cmd_start (idata, "AUTHENTICATE GSSAPI");
/* expect a null continuation response ("+") */
do
rc = imap_cmd_step (idata);
while (rc == IMAP_CMD_CONTINUE);
if (rc != IMAP_CMD_RESPOND)
{
dprint (2, (debugfile, "Invalid response from server: %s\n", buf1));
gss_release_name (&min_stat, &target_name);
goto bail;
}
/* now start the security context initialisation loop... */
dprint (2, (debugfile, "Sending credentials\n"));
mutt_to_base64 ((unsigned char*) buf1, send_token.value, send_token.length,
sizeof (buf1) - 2);
gss_release_buffer (&min_stat, &send_token);
safe_strcat (buf1, sizeof (buf1), "\r\n");
mutt_socket_write (idata->conn, buf1);
while (maj_stat == GSS_S_CONTINUE_NEEDED)
{
/* Read server data */
do
rc = imap_cmd_step (idata);
while (rc == IMAP_CMD_CONTINUE);
if (rc != IMAP_CMD_RESPOND)
{
dprint (1, (debugfile, "Error receiving server response.\n"));
gss_release_name (&min_stat, &target_name);
goto bail;
}
request_buf.length = mutt_from_base64 (buf2, idata->buf + 2);
request_buf.value = buf2;
sec_token = &request_buf;
/* Write client data */
maj_stat = gss_init_sec_context (&min_stat, GSS_C_NO_CREDENTIAL, &context,
target_name, GSS_C_NO_OID, GSS_C_MUTUAL_FLAG | GSS_C_SEQUENCE_FLAG, 0,
GSS_C_NO_CHANNEL_BINDINGS, sec_token, NULL, &send_token,
(unsigned int*) &cflags, NULL);
if (maj_stat != GSS_S_COMPLETE && maj_stat != GSS_S_CONTINUE_NEEDED)
{
print_gss_error(maj_stat, min_stat);
dprint (1, (debugfile, "Error exchanging credentials\n"));
gss_release_name (&min_stat, &target_name);
goto err_abort_cmd;
}
mutt_to_base64 ((unsigned char*) buf1, send_token.value,
send_token.length, sizeof (buf1) - 2);
gss_release_buffer (&min_stat, &send_token);
safe_strcat (buf1, sizeof (buf1), "\r\n");
mutt_socket_write (idata->conn, buf1);
}
gss_release_name (&min_stat, &target_name);
/* get security flags and buffer size */
do
rc = imap_cmd_step (idata);
while (rc == IMAP_CMD_CONTINUE);
if (rc != IMAP_CMD_RESPOND)
{
dprint (1, (debugfile, "Error receiving server response.\n"));
goto bail;
}
request_buf.length = mutt_from_base64 (buf2, idata->buf + 2);
request_buf.value = buf2;
maj_stat = gss_unwrap (&min_stat, context, &request_buf, &send_token,
&cflags, &quality);
if (maj_stat != GSS_S_COMPLETE)
{
print_gss_error(maj_stat, min_stat);
dprint (2, (debugfile, "Couldn't unwrap security level data\n"));
gss_release_buffer (&min_stat, &send_token);
goto err_abort_cmd;
}
dprint (2, (debugfile, "Credential exchange complete\n"));
/* first octet is security levels supported. We want NONE */
server_conf_flags = ((char*) send_token.value)[0];
if ( !(((char*) send_token.value)[0] & GSS_AUTH_P_NONE) )
{
dprint (2, (debugfile, "Server requires integrity or privacy\n"));
gss_release_buffer (&min_stat, &send_token);
goto err_abort_cmd;
}
/* we don't care about buffer size if we don't wrap content. But here it is */
((char*) send_token.value)[0] = 0;
buf_size = ntohl (*((long *) send_token.value));
gss_release_buffer (&min_stat, &send_token);
dprint (2, (debugfile, "Unwrapped security level flags: %c%c%c\n",
server_conf_flags & GSS_AUTH_P_NONE ? 'N' : '-',
server_conf_flags & GSS_AUTH_P_INTEGRITY ? 'I' : '-',
server_conf_flags & GSS_AUTH_P_PRIVACY ? 'P' : '-'));
dprint (2, (debugfile, "Maximum GSS token size is %ld\n", buf_size));
/* agree to terms (hack!) */
buf_size = htonl (buf_size); /* not relevant without integrity/privacy */
memcpy (buf1, &buf_size, 4);
buf1[0] = GSS_AUTH_P_NONE;
/* server decides if principal can log in as user */
strncpy (buf1 + 4, idata->conn->account.user, sizeof (buf1) - 4);
request_buf.value = buf1;
request_buf.length = 4 + strlen (idata->conn->account.user) + 1;
maj_stat = gss_wrap (&min_stat, context, 0, GSS_C_QOP_DEFAULT, &request_buf,
&cflags, &send_token);
if (maj_stat != GSS_S_COMPLETE)
{
dprint (2, (debugfile, "Error creating login request\n"));
goto err_abort_cmd;
}
mutt_to_base64 ((unsigned char*) buf1, send_token.value, send_token.length,
sizeof (buf1) - 2);
dprint (2, (debugfile, "Requesting authorisation as %s\n",
idata->conn->account.user));
safe_strcat (buf1, sizeof (buf1), "\r\n");
mutt_socket_write (idata->conn, buf1);
/* Joy of victory or agony of defeat? */
do
rc = imap_cmd_step (idata);
while (rc == IMAP_CMD_CONTINUE);
if (rc == IMAP_CMD_RESPOND)
{
dprint (1, (debugfile, "Unexpected server continuation request.\n"));
goto err_abort_cmd;
}
if (imap_code (idata->buf))
{
/* flush the security context */
dprint (2, (debugfile, "Releasing GSS credentials\n"));
maj_stat = gss_delete_sec_context (&min_stat, &context, &send_token);
if (maj_stat != GSS_S_COMPLETE)
dprint (1, (debugfile, "Error releasing credentials\n"));
/* send_token may contain a notification to the server to flush
* credentials. RFC 1731 doesn't specify what to do, and since this
* support is only for authentication, we'll assume the server knows
* enough to flush its own credentials */
gss_release_buffer (&min_stat, &send_token);
return IMAP_AUTH_SUCCESS;
}
else
goto bail;
err_abort_cmd:
mutt_socket_write (idata->conn, "*\r\n");
do
rc = imap_cmd_step (idata);
while (rc == IMAP_CMD_CONTINUE);
bail:
mutt_error _("GSSAPI authentication failed.");
mutt_sleep (2);
return IMAP_AUTH_FAILURE;
}