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fdb03b91f2
isync/src/drv_imap.c
Oswald Buddenhagen fdb03b91f2 be more helpful when no SASL mechanisms are available
2016-12-03 21:13:44 +01:00

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/*
* mbsync - mailbox synchronizer
* Copyright (C) 2000-2002 Michael R. Elkins <me@mutt.org>
* Copyright (C) 2002-2006,2008,2010-2013 Oswald Buddenhagen <ossi@users.sf.net>
* Copyright (C) 2004 Theodore Y. Ts'o <tytso@mit.edu>
*
* 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, see <http://www.gnu.org/licenses/>.
*
* As a special exception, mbsync may be linked with the OpenSSL library,
* despite that library's more restrictive license.
*/
#include "driver.h"
#include "socket.h"
#include <assert.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <stddef.h>
#include <limits.h>
#include <string.h>
#include <ctype.h>
#include <time.h>
#include <sys/wait.h>
#ifdef HAVE_LIBSASL
# include <sasl/sasl.h>
# include <sasl/saslutil.h>
#endif
#ifdef HAVE_LIBSSL
enum { SSL_None, SSL_STARTTLS, SSL_IMAPS };
#endif
typedef struct imap_server_conf {
struct imap_server_conf *next;
char *name;
server_conf_t sconf;
char *user;
char *pass;
char *pass_cmd;
int max_in_progress;
string_list_t *auth_mechs;
#ifdef HAVE_LIBSSL
char ssl_type;
#endif
char failed;
} imap_server_conf_t;
typedef struct imap_store_conf {
store_conf_t gen;
imap_server_conf_t *server;
char *delimiter;
char use_namespace;
} imap_store_conf_t;
typedef struct imap_message {
message_t gen;
/* int seq; will be needed when expunges are tracked */
} imap_message_t;
#define NIL (void*)0x1
#define LIST (void*)0x2
typedef struct _list {
struct _list *next, *child;
char *val;
int len;
} list_t;
#define MAX_LIST_DEPTH 5
struct imap_store;
typedef struct parse_list_state {
list_t *head, **stack[MAX_LIST_DEPTH];
int (*callback)( struct imap_store *ctx, list_t *list, char *cmd );
int level, need_bytes;
} parse_list_state_t;
struct imap_cmd;
typedef struct imap_store {
store_t gen;
const char *label; /* foreign */
const char *prefix;
const char *name;
int ref_count;
/* trash folder's existence is not confirmed yet */
enum { TrashUnknown, TrashChecking, TrashKnown } trashnc;
uint got_namespace:1;
char *delimiter; /* hierarchy delimiter */
list_t *ns_personal, *ns_other, *ns_shared; /* NAMESPACE info */
message_t **msgapp; /* FETCH results */
uint caps; /* CAPABILITY results */
string_list_t *auth_mechs;
parse_list_state_t parse_list_sts;
/* command queue */
int nexttag, num_in_progress;
struct imap_cmd *pending, **pending_append;
struct imap_cmd *in_progress, **in_progress_append;
int buffer_mem; /* memory currently occupied by buffers in the queue */
/* Used during sequential operations like connect */
enum { GreetingPending = 0, GreetingBad, GreetingOk, GreetingPreauth } greeting;
int expectBYE; /* LOGOUT is in progress */
int expectEOF; /* received LOGOUT's OK or unsolicited BYE */
int canceling; /* imap_cancel() is in progress */
union {
void (*imap_open)( store_t *srv, void *aux );
void (*imap_cancel)( void *aux );
} callbacks;
void *callback_aux;
#ifdef HAVE_LIBSASL
sasl_conn_t *sasl;
int sasl_cont;
#endif
conn_t conn; /* this is BIG, so put it last */
} imap_store_t;
struct imap_cmd {
struct imap_cmd *next;
char *cmd;
int tag;
struct {
/* Will be called on each continuation request until it resets this pointer.
* Needs to invoke bad_callback and return -1 on error, otherwise return 0. */
int (*cont)( imap_store_t *ctx, struct imap_cmd *cmd, const char *prompt );
void (*done)( imap_store_t *ctx, struct imap_cmd *cmd, int response );
char *data;
int data_len;
int uid; /* to identify fetch responses */
char high_prio; /* if command is queued, put it at the front of the queue. */
char to_trash; /* we are storing to trash, not current. */
char create; /* create the mailbox if we get an error which suggests so. */
char failok; /* Don't complain about NO response. */
} param;
};
struct imap_cmd_simple {
struct imap_cmd gen;
void (*callback)( int sts, void *aux );
void *callback_aux;
};
struct imap_cmd_fetch_msg {
struct imap_cmd_simple gen;
msg_data_t *msg_data;
};
struct imap_cmd_out_uid {
struct imap_cmd gen;
void (*callback)( int sts, int uid, void *aux );
void *callback_aux;
int out_uid;
};
struct imap_cmd_find_new {
struct imap_cmd_simple gen;
int uid;
};
struct imap_cmd_refcounted_state {
void (*callback)( int sts, void *aux );
void *callback_aux;
int ref_count;
int ret_val;
};
struct imap_cmd_refcounted {
struct imap_cmd gen;
struct imap_cmd_refcounted_state *state;
};
#define CAP(cap) (ctx->caps & (1 << (cap)))
enum CAPABILITY {
NOLOGIN = 0,
#ifdef HAVE_LIBSASL
SASLIR,
#endif
#ifdef HAVE_LIBSSL
STARTTLS,
#endif
UIDPLUS,
LITERALPLUS,
MOVE,
NAMESPACE,
COMPRESS_DEFLATE
};
static const char *cap_list[] = {
"LOGINDISABLED",
#ifdef HAVE_LIBSASL
"SASL-IR",
#endif
#ifdef HAVE_LIBSSL
"STARTTLS",
#endif
"UIDPLUS",
"LITERAL+",
"MOVE",
"NAMESPACE",
"COMPRESS=DEFLATE"
};
#define RESP_OK 0
#define RESP_NO 1
#define RESP_CANCEL 2
static INLINE void imap_ref( imap_store_t *ctx ) { ++ctx->ref_count; }
static int imap_deref( imap_store_t *ctx );
static void imap_invoke_bad_callback( imap_store_t *ctx );
static const char *Flags[] = {
"Draft",
"Flagged",
"Answered",
"Seen",
"Deleted",
};
static struct imap_cmd *
new_imap_cmd( int size )
{
struct imap_cmd *cmd = nfmalloc( size );
memset( &cmd->param, 0, sizeof(cmd->param) );
return cmd;
}
#define INIT_IMAP_CMD(type, cmdp, cb, aux) \
cmdp = (struct type *)new_imap_cmd( sizeof(*cmdp) ); \
cmdp->callback = cb; \
cmdp->callback_aux = aux;
#define INIT_IMAP_CMD_X(type, cmdp, cb, aux) \
cmdp = (struct type *)new_imap_cmd( sizeof(*cmdp) ); \
cmdp->gen.callback = cb; \
cmdp->gen.callback_aux = aux;
static void
done_imap_cmd( imap_store_t *ctx, struct imap_cmd *cmd, int response )
{
cmd->param.done( ctx, cmd, response );
if (cmd->param.data) {
free( cmd->param.data );
ctx->buffer_mem -= cmd->param.data_len;
}
free( cmd->cmd );
free( cmd );
}
static void
send_imap_cmd( imap_store_t *ctx, struct imap_cmd *cmd )
{
int bufl, litplus, iovcnt = 1;
const char *buffmt;
conn_iovec_t iov[3];
char buf[1024];
cmd->tag = ++ctx->nexttag;
if (!cmd->param.data) {
buffmt = "%d %s\r\n";
litplus = 0;
} else if ((cmd->param.to_trash && ctx->trashnc == TrashUnknown) || !CAP(LITERALPLUS) || cmd->param.data_len >= 100*1024) {
buffmt = "%d %s{%d}\r\n";
litplus = 0;
} else {
buffmt = "%d %s{%d+}\r\n";
litplus = 1;
}
bufl = nfsnprintf( buf, sizeof(buf), buffmt,
cmd->tag, cmd->cmd, cmd->param.data_len );
if (DFlags & DEBUG_NET) {
if (ctx->num_in_progress)
printf( "(%d in progress) ", ctx->num_in_progress );
if (starts_with( cmd->cmd, -1, "LOGIN", 5 ))
printf( "%s>>> %d LOGIN <user> <pass>\n", ctx->label, cmd->tag );
else if (starts_with( cmd->cmd, -1, "AUTHENTICATE PLAIN", 18 ))
printf( "%s>>> %d AUTHENTICATE PLAIN <authdata>\n", ctx->label, cmd->tag );
else
printf( "%s>>> %s", ctx->label, buf );
fflush( stdout );
}
iov[0].buf = buf;
iov[0].len = bufl;
iov[0].takeOwn = KeepOwn;
if (litplus) {
iov[1].buf = cmd->param.data;
iov[1].len = cmd->param.data_len;
iov[1].takeOwn = GiveOwn;
cmd->param.data = 0;
ctx->buffer_mem -= cmd->param.data_len;
iov[2].buf = "\r\n";
iov[2].len = 2;
iov[2].takeOwn = KeepOwn;
iovcnt = 3;
}
socket_write( &ctx->conn, iov, iovcnt );
if (cmd->param.to_trash && ctx->trashnc == TrashUnknown)
ctx->trashnc = TrashChecking;
cmd->next = 0;
*ctx->in_progress_append = cmd;
ctx->in_progress_append = &cmd->next;
ctx->num_in_progress++;
}
static int
cmd_sendable( imap_store_t *ctx, struct imap_cmd *cmd )
{
struct imap_cmd *cmdp;
return !ctx->conn.write_buf &&
!(ctx->in_progress &&
(cmdp = (struct imap_cmd *)((char *)ctx->in_progress_append -
offsetof(struct imap_cmd, next)), 1) &&
(cmdp->param.cont || cmdp->param.data)) &&
!(cmd->param.to_trash && ctx->trashnc == TrashChecking) &&
ctx->num_in_progress < ((imap_store_conf_t *)ctx->gen.conf)->server->max_in_progress;
}
static void
flush_imap_cmds( imap_store_t *ctx )
{
struct imap_cmd *cmd;
if ((cmd = ctx->pending) && cmd_sendable( ctx, cmd )) {
if (!(ctx->pending = cmd->next))
ctx->pending_append = &ctx->pending;
send_imap_cmd( ctx, cmd );
}
}
static void
cancel_pending_imap_cmds( imap_store_t *ctx )
{
struct imap_cmd *cmd;
while ((cmd = ctx->pending)) {
if (!(ctx->pending = cmd->next))
ctx->pending_append = &ctx->pending;
done_imap_cmd( ctx, cmd, RESP_CANCEL );
}
}
static void
cancel_sent_imap_cmds( imap_store_t *ctx )
{
struct imap_cmd *cmd;
while ((cmd = ctx->in_progress)) {
ctx->in_progress = cmd->next;
/* don't update num_in_progress and in_progress_append - store is dead */
done_imap_cmd( ctx, cmd, RESP_CANCEL );
}
}
static void
submit_imap_cmd( imap_store_t *ctx, struct imap_cmd *cmd )
{
assert( ctx );
assert( ctx->gen.bad_callback );
assert( cmd );
assert( cmd->param.done );
if ((ctx->pending && !cmd->param.high_prio) || !cmd_sendable( ctx, cmd )) {
if (ctx->pending && cmd->param.high_prio) {
cmd->next = ctx->pending;
ctx->pending = cmd;
} else {
cmd->next = 0;
*ctx->pending_append = cmd;
ctx->pending_append = &cmd->next;
}
} else {
send_imap_cmd( ctx, cmd );
}
}
/* Minimal printf() replacement that supports an %\s format sequence to print backslash-escaped
* string literals. Note that this does not automatically add quotes around the printed string,
* so it is possible to concatenate multiple segments. */
static char *
imap_vprintf( const char *fmt, va_list ap )
{
const char *s, *es;
char *d, *ed;
int maxlen;
char c;
char buf[1024]; /* Minimal supported command buffer size per IMAP spec. */
d = buf;
ed = d + sizeof(buf);
s = fmt;
for (;;) {
c = *fmt;
if (!c || c == '%') {
int l = fmt - s;
if (d + l > ed)
oob();
memcpy( d, s, l );
d += l;
if (!c) {
l = d - buf;
ed = nfmalloc( l + 1 );
memcpy( ed, buf, l );
ed[l] = 0;
return ed;
}
maxlen = INT_MAX;
c = *++fmt;
if (c == '\\') {
c = *++fmt;
if (c != 's') {
fputs( "Fatal: unsupported escaped format specifier. Please report a bug.\n", stderr );
abort();
}
s = va_arg( ap, const char * );
while ((c = *s++)) {
if (d + 2 > ed)
oob();
if (c == '\\' || c == '"')
*d++ = '\\';
*d++ = c;
}
} else { /* \\ cannot be combined with anything else. */
if (c == '.') {
c = *++fmt;
if (c != '*') {
fputs( "Fatal: unsupported string length specification. Please report a bug.\n", stderr );
abort();
}
maxlen = va_arg( ap , int );
c = *++fmt;
}
if (c == 'c') {
if (d + 1 > ed)
oob();
*d++ = (char)va_arg( ap , int );
} else if (c == 's') {
s = va_arg( ap, const char * );
es = memchr( s, 0, maxlen );
l = es ? es - s : maxlen;
if (d + l > ed)
oob();
memcpy( d, s, l );
d += l;
} else if (c == 'd') {
d += nfsnprintf( d, ed - d, "%d", va_arg( ap , int ) );
} else {
fputs( "Fatal: unsupported format specifier. Please report a bug.\n", stderr );
abort();
}
}
s = ++fmt;
} else {
fmt++;
}
}
}
static void
imap_exec( imap_store_t *ctx, struct imap_cmd *cmdp,
void (*done)( imap_store_t *ctx, struct imap_cmd *cmd, int response ),
const char *fmt, ... )
{
va_list ap;
if (!cmdp)
cmdp = new_imap_cmd( sizeof(*cmdp) );
cmdp->param.done = done;
va_start( ap, fmt );
cmdp->cmd = imap_vprintf( fmt, ap );
va_end( ap );
submit_imap_cmd( ctx, cmdp );
}
static void
transform_box_response( int *response )
{
switch (*response) {
case RESP_CANCEL: *response = DRV_CANCELED; break;
case RESP_NO: *response = DRV_BOX_BAD; break;
default: *response = DRV_OK; break;
}
}
static void
imap_done_simple_box( imap_store_t *ctx ATTR_UNUSED,
struct imap_cmd *cmd, int response )
{
struct imap_cmd_simple *cmdp = (struct imap_cmd_simple *)cmd;
transform_box_response( &response );
cmdp->callback( response, cmdp->callback_aux );
}
static void
transform_msg_response( int *response )
{
switch (*response) {
case RESP_CANCEL: *response = DRV_CANCELED; break;
case RESP_NO: *response = DRV_MSG_BAD; break;
default: *response = DRV_OK; break;
}
}
static void
imap_done_simple_msg( imap_store_t *ctx ATTR_UNUSED,
struct imap_cmd *cmd, int response )
{
struct imap_cmd_simple *cmdp = (struct imap_cmd_simple *)cmd;
transform_msg_response( &response );
cmdp->callback( response, cmdp->callback_aux );
}
static struct imap_cmd_refcounted_state *
imap_refcounted_new_state( void (*cb)( int, void * ), void *aux )
{
struct imap_cmd_refcounted_state *sts = nfmalloc( sizeof(*sts) );
sts->callback = cb;
sts->callback_aux = aux;
sts->ref_count = 1; /* so forced sync does not cause an early exit */
sts->ret_val = DRV_OK;
return sts;
}
static struct imap_cmd *
imap_refcounted_new_cmd( struct imap_cmd_refcounted_state *sts )
{
struct imap_cmd_refcounted *cmd = (struct imap_cmd_refcounted *)new_imap_cmd( sizeof(*cmd) );
cmd->state = sts;
sts->ref_count++;
return &cmd->gen;
}
static void
imap_refcounted_done( struct imap_cmd_refcounted_state *sts )
{
if (!--sts->ref_count) {
sts->callback( sts->ret_val, sts->callback_aux );
free( sts );
}
}
static void
imap_refcounted_done_box( imap_store_t *ctx ATTR_UNUSED, struct imap_cmd *cmd, int response )
{
struct imap_cmd_refcounted_state *sts = ((struct imap_cmd_refcounted *)cmd)->state;
switch (response) {
case RESP_CANCEL:
sts->ret_val = DRV_CANCELED;
break;
case RESP_NO:
if (sts->ret_val == DRV_OK) /* Don't override cancelation. */
sts->ret_val = DRV_BOX_BAD;
break;
}
imap_refcounted_done( sts );
}
static const char *
imap_strchr( const char *s, char tc )
{
for (;; s++) {
char c = *s;
if (c == '\\')
c = *++s;
if (!c)
return 0;
if (c == tc)
return s;
}
}
static char *
next_arg( char **ps )
{
char *ret, *s, *d;
char c;
assert( ps );
s = *ps;
if (!s)
return 0;
while (isspace( (uchar)*s ))
s++;
if (!*s) {
*ps = 0;
return 0;
}
if (*s == '"') {
s++;
ret = d = s;
while ((c = *s++) != '"') {
if (c == '\\')
c = *s++;
if (!c) {
*ps = 0;
return 0;
}
*d++ = c;
}
*d = 0;
} else {
ret = s;
while ((c = *s)) {
if (isspace( (uchar)c )) {
*s++ = 0;
break;
}
s++;
}
}
if (!*s)
s = 0;
*ps = s;
return ret;
}
static int
is_atom( list_t *list )
{
return list && list->val && list->val != NIL && list->val != LIST;
}
static int
is_list( list_t *list )
{
return list && list->val == LIST;
}
static void
free_list( list_t *list )
{
list_t *tmp;
for (; list; list = tmp) {
tmp = list->next;
if (is_list( list ))
free_list( list->child );
else if (is_atom( list ))
free( list->val );
free( list );
}
}
enum {
LIST_OK,
LIST_PARTIAL,
LIST_BAD
};
static int
parse_imap_list( imap_store_t *ctx, char **sp, parse_list_state_t *sts )
{
list_t *cur, **curp;
char *s = *sp, *d, *p;
int n, bytes;
char c;
assert( sts );
assert( sts->level > 0 );
curp = sts->stack[--sts->level];
bytes = sts->need_bytes;
if (bytes >= 0) {
sts->need_bytes = -1;
if (!bytes)
goto getline;
cur = (list_t *)((char *)curp - offsetof(list_t, next));
s = cur->val + cur->len - bytes;
goto getbytes;
}
if (!s)
return LIST_BAD;
for (;;) {
while (isspace( (uchar)*s ))
s++;
if (sts->level && *s == ')') {
s++;
curp = sts->stack[--sts->level];
goto next;
}
*curp = cur = nfmalloc( sizeof(*cur) );
cur->val = 0; /* for clean bail */
curp = &cur->next;
*curp = 0; /* ditto */
if (*s == '(') {
/* sublist */
if (sts->level == MAX_LIST_DEPTH)
goto bail;
s++;
cur->val = LIST;
sts->stack[sts->level++] = curp;
curp = &cur->child;
*curp = 0; /* for clean bail */
goto next2;
} else if (ctx && *s == '{') {
/* literal */
bytes = cur->len = strtol( s + 1, &s, 10 );
if (*s != '}' || *++s)
goto bail;
s = cur->val = nfmalloc( cur->len + 1 );
s[cur->len] = 0;
getbytes:
n = socket_read( &ctx->conn, s, bytes );
if (n < 0) {
badeof:
error( "IMAP error: unexpected EOF from %s\n", ctx->conn.name );
goto bail;
}
bytes -= n;
if (bytes > 0)
goto postpone;
if (DFlags & DEBUG_NET_ALL) {
printf( "%s=========\n", ctx->label );
fwrite( cur->val, cur->len, 1, stdout );
printf( "%s=========\n", ctx->label );
fflush( stdout );
}
getline:
if (!(s = socket_read_line( &ctx->conn )))
goto postpone;
if (s == (void *)~0)
goto badeof;
if (DFlags & DEBUG_NET) {
printf( "%s%s\n", ctx->label, s );
fflush( stdout );
}
} else if (*s == '"') {
/* quoted string */
s++;
p = d = s;
while ((c = *s++) != '"') {
if (c == '\\')
c = *s++;
if (!c)
goto bail;
*d++ = c;
}
cur->len = d - p;
cur->val = nfmalloc( cur->len + 1 );
memcpy( cur->val, p, cur->len );
cur->val[cur->len] = 0;
} else {
/* atom */
p = s;
for (; *s && !isspace( (uchar)*s ); s++)
if (sts->level && *s == ')')
break;
cur->len = s - p;
if (equals( p, cur->len, "NIL", 3 ))
cur->val = NIL;
else {
cur->val = nfmalloc( cur->len + 1 );
memcpy( cur->val, p, cur->len );
cur->val[cur->len] = 0;
}
}
next:
if (!sts->level)
break;
next2:
if (!*s)
goto bail;
}
*sp = s;
return LIST_OK;
postpone:
if (sts->level < MAX_LIST_DEPTH) {
sts->stack[sts->level++] = curp;
sts->need_bytes = bytes;
return LIST_PARTIAL;
}
bail:
free_list( sts->head );
return LIST_BAD;
}
static void
parse_list_init( parse_list_state_t *sts )
{
sts->need_bytes = -1;
sts->level = 1;
sts->head = 0;
sts->stack[0] = &sts->head;
}
static int
parse_list_continue( imap_store_t *ctx, char *s )
{
list_t *list;
int resp;
if ((resp = parse_imap_list( ctx, &s, &ctx->parse_list_sts )) != LIST_PARTIAL) {
list = (resp == LIST_BAD) ? 0 : ctx->parse_list_sts.head;
ctx->parse_list_sts.head = 0;
resp = ctx->parse_list_sts.callback( ctx, list, s );
}
return resp;
}
static int
parse_list( imap_store_t *ctx, char *s, int (*cb)( imap_store_t *ctx, list_t *list, char *s ) )
{
parse_list_init( &ctx->parse_list_sts );
ctx->parse_list_sts.callback = cb;
return parse_list_continue( ctx, s );
}
static int parse_namespace_rsp_p2( imap_store_t *, list_t *, char * );
static int parse_namespace_rsp_p3( imap_store_t *, list_t *, char * );
static int
parse_namespace_rsp_fail( void )
{
error( "IMAP error: malformed NAMESPACE response\n" );
return LIST_BAD;
}
static int
parse_namespace_rsp( imap_store_t *ctx, list_t *list, char *s )
{
if (!(ctx->ns_personal = list))
return parse_namespace_rsp_fail();
return parse_list( ctx, s, parse_namespace_rsp_p2 );
}
static int
parse_namespace_rsp_p2( imap_store_t *ctx, list_t *list, char *s )
{
if (!(ctx->ns_other = list))
return parse_namespace_rsp_fail();
return parse_list( ctx, s, parse_namespace_rsp_p3 );
}
static int
parse_namespace_rsp_p3( imap_store_t *ctx, list_t *list, char *s ATTR_UNUSED )
{
if (!(ctx->ns_shared = list))
return parse_namespace_rsp_fail();
return LIST_OK;
}
static time_t
parse_date( const char *str )
{
char *end;
time_t date;
int hours, mins;
struct tm datetime;
memset( &datetime, 0, sizeof(datetime) );
if (!(end = strptime( str, "%d-%b-%Y %H:%M:%S ", &datetime )))
return -1;
if ((date = timegm( &datetime )) == -1)
return -1;
if (sscanf( end, "%3d%2d", &hours, &mins ) != 2)
return -1;
return date - (hours * 60 + mins) * 60;
}
static int
parse_fetch_rsp( imap_store_t *ctx, list_t *list, char *s ATTR_UNUSED )
{
list_t *tmp, *flags;
char *body = 0, *tuid = 0;
imap_message_t *cur;
msg_data_t *msgdata;
struct imap_cmd *cmdp;
int uid = 0, mask = 0, status = 0, size = 0;
uint i;
time_t date = 0;
if (!is_list( list )) {
error( "IMAP error: bogus FETCH response\n" );
free_list( list );
return LIST_BAD;
}
for (tmp = list->child; tmp; tmp = tmp->next) {
if (is_atom( tmp )) {
if (!strcmp( "UID", tmp->val )) {
tmp = tmp->next;
if (is_atom( tmp ))
uid = atoi( tmp->val );
else
error( "IMAP error: unable to parse UID\n" );
} else if (!strcmp( "FLAGS", tmp->val )) {
tmp = tmp->next;
if (is_list( tmp )) {
for (flags = tmp->child; flags; flags = flags->next) {
if (is_atom( flags )) {
if (flags->val[0] == '\\') { /* ignore user-defined flags for now */
if (!strcmp( "Recent", flags->val + 1)) {
status |= M_RECENT;
goto flagok;
}
for (i = 0; i < as(Flags); i++)
if (!strcmp( Flags[i], flags->val + 1 )) {
mask |= 1 << i;
goto flagok;
}
if (flags->val[1] == 'X' && flags->val[2] == '-')
goto flagok; /* ignore system flag extensions */
error( "IMAP warning: unknown system flag %s\n", flags->val );
}
flagok: ;
} else
error( "IMAP error: unable to parse FLAGS list\n" );
}
status |= M_FLAGS;
} else
error( "IMAP error: unable to parse FLAGS\n" );
} else if (!strcmp( "INTERNALDATE", tmp->val )) {
tmp = tmp->next;
if (is_atom( tmp )) {
if ((date = parse_date( tmp->val )) == -1)
error( "IMAP error: unable to parse INTERNALDATE format\n" );
} else
error( "IMAP error: unable to parse INTERNALDATE\n" );
} else if (!strcmp( "RFC822.SIZE", tmp->val )) {
tmp = tmp->next;
if (is_atom( tmp ))
size = atoi( tmp->val );
else
error( "IMAP error: unable to parse RFC822.SIZE\n" );
} else if (!strcmp( "BODY[]", tmp->val )) {
tmp = tmp->next;
if (is_atom( tmp )) {
body = tmp->val;
tmp->val = 0; /* don't free together with list */
size = tmp->len;
} else
error( "IMAP error: unable to parse BODY[]\n" );
} else if (!strcmp( "BODY[HEADER.FIELDS", tmp->val )) {
tmp = tmp->next;
if (is_list( tmp )) {
tmp = tmp->next;
if (!is_atom( tmp ) || strcmp( tmp->val, "]" ))
goto bfail;
tmp = tmp->next;
if (!is_atom( tmp ))
goto bfail;
if (starts_with_upper( tmp->val, tmp->len, "X-TUID: ", 8 ))
tuid = tmp->val + 8;
} else {
bfail:
error( "IMAP error: unable to parse BODY[HEADER.FIELDS ...]\n" );
}
}
}
}
if (body) {
for (cmdp = ctx->in_progress; cmdp; cmdp = cmdp->next)
if (cmdp->param.uid == uid)
goto gotuid;
error( "IMAP error: unexpected FETCH response (UID %d)\n", uid );
free_list( list );
return LIST_BAD;
gotuid:
msgdata = ((struct imap_cmd_fetch_msg *)cmdp)->msg_data;
msgdata->data = body;
msgdata->len = size;
msgdata->date = date;
if (status & M_FLAGS)
msgdata->flags = mask;
} else if (uid) { /* ignore async flag updates for now */
/* XXX this will need sorting for out-of-order (multiple queries) */
cur = nfcalloc( sizeof(*cur) );
*ctx->msgapp = &cur->gen;
ctx->msgapp = &cur->gen.next;
cur->gen.next = 0;
cur->gen.uid = uid;
cur->gen.flags = mask;
cur->gen.status = status;
cur->gen.size = size;
cur->gen.srec = 0;
if (tuid)
strncpy( cur->gen.tuid, tuid, TUIDL );
else
cur->gen.tuid[0] = 0;
if (ctx->gen.uidnext <= uid) /* in case the server sends no UIDNEXT */
ctx->gen.uidnext = uid + 1;
}
free_list( list );
return LIST_OK;
}
static void
parse_capability( imap_store_t *ctx, char *cmd )
{
char *arg;
uint i;
free_string_list( ctx->auth_mechs );
ctx->auth_mechs = 0;
ctx->caps = 0x80000000;
while ((arg = next_arg( &cmd ))) {
if (starts_with( arg, -1, "AUTH=", 5 )) {
add_string_list( &ctx->auth_mechs, arg + 5 );
} else {
for (i = 0; i < as(cap_list); i++)
if (!strcmp( cap_list[i], arg ))
ctx->caps |= 1 << i;
}
}
if (!CAP(NOLOGIN))
add_string_list( &ctx->auth_mechs, "LOGIN" );
}
static int
parse_response_code( imap_store_t *ctx, struct imap_cmd *cmd, char *s )
{
char *arg, *earg, *p;
if (!s || *s != '[')
return RESP_OK; /* no response code */
s++;
if (!(p = strchr( s, ']' ))) {
bad_resp:
error( "IMAP error: malformed response code\n" );
return RESP_CANCEL;
}
*p++ = 0;
if (!(arg = next_arg( &s )))
goto bad_resp;
if (!strcmp( "UIDVALIDITY", arg )) {
if (!(arg = next_arg( &s )) ||
(ctx->gen.uidvalidity = strtoll( arg, &earg, 10 ), *earg))
{
error( "IMAP error: malformed UIDVALIDITY status\n" );
return RESP_CANCEL;
}
} else if (!strcmp( "UIDNEXT", arg )) {
if (!(arg = next_arg( &s )) || !(ctx->gen.uidnext = atoi( arg ))) {
error( "IMAP error: malformed NEXTUID status\n" );
return RESP_CANCEL;
}
} else if (!strcmp( "CAPABILITY", arg )) {
parse_capability( ctx, s );
} else if (!strcmp( "ALERT", arg )) {
/* RFC2060 says that these messages MUST be displayed
* to the user
*/
for (; isspace( (uchar)*p ); p++);
error( "*** IMAP ALERT *** %s\n", p );
} else if (cmd && !strcmp( "APPENDUID", arg )) {
if (!(arg = next_arg( &s )) ||
(ctx->gen.uidvalidity = strtoll( arg, &earg, 10 ), *earg) ||
!(arg = next_arg( &s )) ||
!(((struct imap_cmd_out_uid *)cmd)->out_uid = atoi( arg )))
{
error( "IMAP error: malformed APPENDUID status\n" );
return RESP_CANCEL;
}
}
return RESP_OK;
}
static int parse_list_rsp_p2( imap_store_t *, list_t *, char * );
static int
parse_list_rsp( imap_store_t *ctx, list_t *list, char *cmd )
{
char *arg;
list_t *lp;
if (!is_list( list )) {
free_list( list );
bad_list:
error( "IMAP error: malformed LIST response\n" );
return LIST_BAD;
}
for (lp = list->child; lp; lp = lp->next)
if (is_atom( lp ) && !strcasecmp( lp->val, "\\NoSelect" )) {
free_list( list );
return LIST_OK;
}
free_list( list );
if (!(arg = next_arg( &cmd )))
goto bad_list;
if (!ctx->delimiter)
ctx->delimiter = nfstrdup( arg );
return parse_list( ctx, cmd, parse_list_rsp_p2 );
}
static int
is_inbox( imap_store_t *ctx, const char *arg, int argl )
{
int i;
char c;
if (!starts_with( arg, argl, "INBOX", 5 ))
return 0;
if (arg[5])
for (i = 0; (c = ctx->delimiter[i]); i++)
if (arg[i + 5] != c)
return 0;
return 1;
}
static int
parse_list_rsp_p2( imap_store_t *ctx, list_t *list, char *cmd ATTR_UNUSED )
{
string_list_t *narg;
char *arg;
int argl, l;
if (!is_atom( list )) {
error( "IMAP error: malformed LIST response\n" );
free_list( list );
return LIST_BAD;
}
arg = list->val;
argl = list->len;
if ((l = strlen( ctx->prefix ))) {
if (starts_with( arg, argl, ctx->prefix, l )) {
arg += l;
argl -= l;
if (is_inbox( ctx, arg, argl )) {
if (!arg[5])
warn( "IMAP warning: ignoring INBOX in %s\n", ctx->prefix );
goto skip;
}
} else if (!is_inbox( ctx, arg, argl )) {
goto skip;
}
}
if (argl >= 5 && !memcmp( arg + argl - 5, ".lock", 5 )) /* workaround broken servers */
goto skip;
if (map_name( arg, (char **)&narg, offsetof(string_list_t, string), ctx->delimiter, "/") < 0) {
warn( "IMAP warning: ignoring mailbox %s (reserved character '/' in name)\n", arg );
goto skip;
}
narg->next = ctx->gen.boxes;
ctx->gen.boxes = narg;
skip:
free_list( list );
return LIST_OK;
}
static int
prepare_name( char **buf, const imap_store_t *ctx, const char *prefix, const char *name )
{
int pl = strlen( prefix );
switch (map_name( name, buf, pl, "/", ctx->delimiter )) {
case -1:
error( "IMAP error: mailbox name %s contains server's hierarchy delimiter\n", name );
return -1;
case -2:
error( "IMAP error: server's hierarchy delimiter not known\n" );
return -1;
default:
memcpy( *buf, prefix, pl );
return 0;
}
}
static int
prepare_box( char **buf, const imap_store_t *ctx )
{
const char *name = ctx->name;
return prepare_name( buf, ctx,
(starts_with( name, -1, "INBOX", 5 ) && (!name[5] || name[5] == '/')) ? "" : ctx->prefix, name );
}
static int
prepare_trash( char **buf, const imap_store_t *ctx )
{
return prepare_name( buf, ctx, ctx->prefix, ctx->gen.conf->trash );
}
struct imap_cmd_trycreate {
struct imap_cmd gen;
struct imap_cmd *orig_cmd;
};
static void imap_open_store_greeted( imap_store_t * );
static void get_cmd_result_p2( imap_store_t *, struct imap_cmd *, int );
static void
imap_socket_read( void *aux )
{
imap_store_t *ctx = (imap_store_t *)aux;
struct imap_cmd *cmdp, **pcmdp;
char *cmd, *arg, *arg1, *p;
int resp, resp2, tag;
conn_iovec_t iov[2];
for (;;) {
if (ctx->parse_list_sts.level) {
resp = parse_list_continue( ctx, 0 );
listret:
if (resp == LIST_PARTIAL)
return;
if (resp == LIST_BAD)
break;
continue;
}
if (!(cmd = socket_read_line( &ctx->conn )))
return;
if (cmd == (void *)~0) {
if (!ctx->expectEOF)
error( "IMAP error: unexpected EOF from %s\n", ctx->conn.name );
/* A clean shutdown sequence ends with bad_callback as well (see imap_cleanup()). */
break;
}
if (DFlags & DEBUG_NET) {
printf( "%s%s\n", ctx->label, cmd );
fflush( stdout );
}
arg = next_arg( &cmd );
if (!arg) {
error( "IMAP error: empty response\n" );
break;
}
if (*arg == '*') {
arg = next_arg( &cmd );
if (!arg) {
error( "IMAP error: malformed untagged response\n" );
break;
}
if (ctx->greeting == GreetingPending && !strcmp( "PREAUTH", arg )) {
parse_response_code( ctx, 0, cmd );
ctx->greeting = GreetingPreauth;
dogreet:
imap_ref( ctx );
imap_open_store_greeted( ctx );
if (imap_deref( ctx ))
return;
} else if (!strcmp( "OK", arg )) {
parse_response_code( ctx, 0, cmd );
if (ctx->greeting == GreetingPending) {
ctx->greeting = GreetingOk;
goto dogreet;
}
} else if (!strcmp( "BYE", arg )) {
if (!ctx->expectBYE) {
ctx->greeting = GreetingBad;
error( "IMAP error: unexpected BYE response: %s\n", cmd );
/* We just wait for the server to close the connection now. */
ctx->expectEOF = 1;
} else {
/* We still need to wait for the LOGOUT's tagged OK. */
}
} else if (ctx->greeting == GreetingPending) {
error( "IMAP error: bogus greeting response %s\n", arg );
break;
} else if (!strcmp( "NO", arg )) {
warn( "Warning from IMAP server: %s\n", cmd );
} else if (!strcmp( "BAD", arg )) {
error( "Error from IMAP server: %s\n", cmd );
} else if (!strcmp( "CAPABILITY", arg )) {
parse_capability( ctx, cmd );
} else if (!strcmp( "LIST", arg )) {
resp = parse_list( ctx, cmd, parse_list_rsp );
goto listret;
} else if (!strcmp( "NAMESPACE", arg )) {
resp = parse_list( ctx, cmd, parse_namespace_rsp );
goto listret;
} else if ((arg1 = next_arg( &cmd ))) {
if (!strcmp( "EXISTS", arg1 ))
ctx->gen.count = atoi( arg );
else if (!strcmp( "RECENT", arg1 ))
ctx->gen.recent = atoi( arg );
else if(!strcmp ( "FETCH", arg1 )) {
resp = parse_list( ctx, cmd, parse_fetch_rsp );
goto listret;
}
} else {
error( "IMAP error: unrecognized untagged response '%s'\n", arg );
break; /* this may mean anything, so prefer not to spam the log */
}
continue;
} else if (!ctx->in_progress) {
error( "IMAP error: unexpected reply: %s %s\n", arg, cmd ? cmd : "" );
break; /* this may mean anything, so prefer not to spam the log */
} else if (*arg == '+') {
/* There can be any number of commands in flight, but only the last
* one can require a continuation, as it enforces a round-trip. */
cmdp = (struct imap_cmd *)((char *)ctx->in_progress_append -
offsetof(struct imap_cmd, next));
if (cmdp->param.data) {
if (cmdp->param.to_trash)
ctx->trashnc = TrashKnown; /* Can't get NO [TRYCREATE] any more. */
iov[0].buf = cmdp->param.data;
iov[0].len = cmdp->param.data_len;
iov[0].takeOwn = GiveOwn;
cmdp->param.data = 0;
ctx->buffer_mem -= cmdp->param.data_len;
iov[1].buf = "\r\n";
iov[1].len = 2;
iov[1].takeOwn = KeepOwn;
socket_write( &ctx->conn, iov, 2 );
} else if (cmdp->param.cont) {
if (cmdp->param.cont( ctx, cmdp, cmd ))
return;
} else {
error( "IMAP error: unexpected command continuation request\n" );
break;
}
} else {
tag = atoi( arg );
for (pcmdp = &ctx->in_progress; (cmdp = *pcmdp); pcmdp = &cmdp->next)
if (cmdp->tag == tag)
goto gottag;
error( "IMAP error: unexpected tag %s\n", arg );
break;
gottag:
if (!(*pcmdp = cmdp->next))
ctx->in_progress_append = pcmdp;
ctx->num_in_progress--;
arg = next_arg( &cmd );
if (!arg) {
error( "IMAP error: malformed tagged response\n" );
break;
}
if (!strcmp( "OK", arg )) {
if (cmdp->param.to_trash)
ctx->trashnc = TrashKnown; /* Can't get NO [TRYCREATE] any more. */
resp = RESP_OK;
} else {
if (!strcmp( "NO", arg )) {
if (cmdp->param.create && cmd && starts_with( cmd, -1, "[TRYCREATE]", 11 )) { /* APPEND or UID COPY */
struct imap_cmd_trycreate *cmd2 =
(struct imap_cmd_trycreate *)new_imap_cmd( sizeof(*cmd2) );
cmd2->orig_cmd = cmdp;
cmd2->gen.param.high_prio = 1;
p = strchr( cmdp->cmd, '"' );
imap_exec( ctx, &cmd2->gen, get_cmd_result_p2,
"CREATE %.*s", imap_strchr( p + 1, '"' ) - p + 1, p );
continue;
}
resp = RESP_NO;
if (cmdp->param.failok)
goto doresp;
} else /*if (!strcmp( "BAD", arg ))*/
resp = RESP_CANCEL;
error( "IMAP command '%s' returned an error: %s %s\n",
starts_with( cmdp->cmd, -1, "LOGIN", 5 ) ?
"LOGIN <user> <pass>" :
starts_with( cmdp->cmd, -1, "AUTHENTICATE PLAIN", 18 ) ?
"AUTHENTICATE PLAIN <authdata>" :
cmdp->cmd,
arg, cmd ? cmd : "" );
}
doresp:
if ((resp2 = parse_response_code( ctx, cmdp, cmd )) > resp)
resp = resp2;
imap_ref( ctx );
if (resp == RESP_CANCEL)
imap_invoke_bad_callback( ctx );
done_imap_cmd( ctx, cmdp, resp );
if (imap_deref( ctx ))
return;
if (ctx->canceling && !ctx->in_progress) {
ctx->canceling = 0;
ctx->callbacks.imap_cancel( ctx->callback_aux );
return;
}
}
flush_imap_cmds( ctx );
}
imap_invoke_bad_callback( ctx );
}
static void
get_cmd_result_p2( imap_store_t *ctx, struct imap_cmd *cmd, int response )
{
struct imap_cmd_trycreate *cmdp = (struct imap_cmd_trycreate *)cmd;
struct imap_cmd *ocmd = cmdp->orig_cmd;
if (response != RESP_OK) {
done_imap_cmd( ctx, ocmd, response );
} else {
ctx->gen.uidnext = 1;
if (ocmd->param.to_trash)
ctx->trashnc = TrashKnown;
ocmd->param.create = 0;
ocmd->param.high_prio = 1;
submit_imap_cmd( ctx, ocmd );
}
}
/******************* imap_cancel_store *******************/
static void
imap_cancel_store( store_t *gctx )
{
imap_store_t *ctx = (imap_store_t *)gctx;
#ifdef HAVE_LIBSASL
sasl_dispose( &ctx->sasl );
#endif
socket_close( &ctx->conn );
cancel_sent_imap_cmds( ctx );
cancel_pending_imap_cmds( ctx );
free_generic_messages( ctx->gen.msgs );
free_string_list( ctx->gen.boxes );
free_list( ctx->ns_personal );
free_list( ctx->ns_other );
free_list( ctx->ns_shared );
free_string_list( ctx->auth_mechs );
free( ctx->delimiter );
imap_deref( ctx );
}
static int
imap_deref( imap_store_t *ctx )
{
if (!--ctx->ref_count) {
free( ctx );
return -1;
}
return 0;
}
static void
imap_invoke_bad_callback( imap_store_t *ctx )
{
ctx->gen.bad_callback( ctx->gen.bad_callback_aux );
}
/******************* imap_disown_store *******************/
static store_t *unowned;
static void
imap_cancel_unowned( void *gctx )
{
store_t *store, **storep;
for (storep = &unowned; (store = *storep); storep = &store->next)
if (store == gctx) {
*storep = store->next;
break;
}
imap_cancel_store( gctx );
}
static void
imap_disown_store( store_t *gctx )
{
free_generic_messages( gctx->msgs );
gctx->msgs = 0;
set_bad_callback( gctx, imap_cancel_unowned, gctx );
gctx->next = unowned;
unowned = gctx;
}
/******************* imap_cleanup *******************/
static void imap_cleanup_p2( imap_store_t *, struct imap_cmd *, int );
static void
imap_cleanup( void )
{
store_t *ctx, *nctx;
for (ctx = unowned; ctx; ctx = nctx) {
nctx = ctx->next;
set_bad_callback( ctx, (void (*)(void *))imap_cancel_store, ctx );
((imap_store_t *)ctx)->expectBYE = 1;
imap_exec( (imap_store_t *)ctx, 0, imap_cleanup_p2, "LOGOUT" );
}
}
static void
imap_cleanup_p2( imap_store_t *ctx,
struct imap_cmd *cmd ATTR_UNUSED, int response )
{
if (response == RESP_NO)
imap_cancel_store( &ctx->gen );
else if (response == RESP_OK)
ctx->expectEOF = 1;
}
/******************* imap_open_store *******************/
static void imap_open_store_connected( int, void * );
#ifdef HAVE_LIBSSL
static void imap_open_store_tlsstarted1( int, void * );
#endif
static void imap_open_store_p2( imap_store_t *, struct imap_cmd *, int );
static void imap_open_store_authenticate( imap_store_t * );
#ifdef HAVE_LIBSSL
static void imap_open_store_authenticate_p2( imap_store_t *, struct imap_cmd *, int );
static void imap_open_store_tlsstarted2( int, void * );
static void imap_open_store_authenticate_p3( imap_store_t *, struct imap_cmd *, int );
#endif
static void imap_open_store_authenticate2( imap_store_t * );
static void imap_open_store_authenticate2_p2( imap_store_t *, struct imap_cmd *, int );
static void imap_open_store_compress( imap_store_t * );
#ifdef HAVE_LIBZ
static void imap_open_store_compress_p2( imap_store_t *, struct imap_cmd *, int );
#endif
static void imap_open_store_namespace( imap_store_t * );
static void imap_open_store_namespace_p2( imap_store_t *, struct imap_cmd *, int );
static void imap_open_store_namespace2( imap_store_t * );
static void imap_open_store_finalize( imap_store_t * );
#ifdef HAVE_LIBSSL
static void imap_open_store_ssl_bail( imap_store_t * );
#endif
static void imap_open_store_bail( imap_store_t *, int );
static void
imap_open_store_bad( void *aux )
{
imap_open_store_bail( (imap_store_t *)aux, FAIL_TEMP );
}
static void
imap_open_store( store_conf_t *conf, const char *label,
void (*cb)( store_t *srv, void *aux ), void *aux )
{
imap_store_conf_t *cfg = (imap_store_conf_t *)conf;
imap_server_conf_t *srvc = cfg->server;
imap_store_t *ctx;
store_t **ctxp;
for (ctxp = &unowned; (ctx = (imap_store_t *)*ctxp); ctxp = &ctx->gen.next)
if (ctx->gen.conf == conf) {
*ctxp = ctx->gen.next;
ctx->label = label;
cb( &ctx->gen, aux );
return;
}
for (ctxp = &unowned; (ctx = (imap_store_t *)*ctxp); ctxp = &ctx->gen.next)
if (((imap_store_conf_t *)ctx->gen.conf)->server == srvc) {
*ctxp = ctx->gen.next;
ctx->label = label;
/* One could ping the server here, but given that the idle timeout
* is at least 30 minutes, this sounds pretty pointless. */
free_string_list( ctx->gen.boxes );
ctx->gen.boxes = 0;
ctx->gen.listed = 0;
ctx->gen.conf = conf;
free( ctx->delimiter );
ctx->delimiter = 0;
ctx->callbacks.imap_open = cb;
ctx->callback_aux = aux;
set_bad_callback( &ctx->gen, imap_open_store_bad, ctx );
imap_open_store_namespace( ctx );
return;
}
ctx = nfcalloc( sizeof(*ctx) );
ctx->gen.conf = conf;
ctx->label = label;
ctx->ref_count = 1;
ctx->callbacks.imap_open = cb;
ctx->callback_aux = aux;
set_bad_callback( &ctx->gen, imap_open_store_bad, ctx );
ctx->in_progress_append = &ctx->in_progress;
ctx->pending_append = &ctx->pending;
socket_init( &ctx->conn, &srvc->sconf,
(void (*)( void * ))imap_invoke_bad_callback,
imap_socket_read, (void (*)(void *))flush_imap_cmds, ctx );
socket_connect( &ctx->conn, imap_open_store_connected );
}
static void
imap_open_store_connected( int ok, void *aux )
{
imap_store_t *ctx = (imap_store_t *)aux;
#ifdef HAVE_LIBSSL
imap_store_conf_t *cfg = (imap_store_conf_t *)ctx->gen.conf;
imap_server_conf_t *srvc = cfg->server;
#endif
if (!ok)
imap_open_store_bail( ctx, FAIL_WAIT );
#ifdef HAVE_LIBSSL
else if (srvc->ssl_type == SSL_IMAPS)
socket_start_tls( &ctx->conn, imap_open_store_tlsstarted1 );
#endif
}
#ifdef HAVE_LIBSSL
static void
imap_open_store_tlsstarted1( int ok, void *aux )
{
imap_store_t *ctx = (imap_store_t *)aux;
if (!ok)
imap_open_store_ssl_bail( ctx );
}
#endif
static void
imap_open_store_greeted( imap_store_t *ctx )
{
if (!ctx->caps)
imap_exec( ctx, 0, imap_open_store_p2, "CAPABILITY" );
else
imap_open_store_authenticate( ctx );
}
static void
imap_open_store_p2( imap_store_t *ctx, struct imap_cmd *cmd ATTR_UNUSED, int response )
{
if (response == RESP_NO)
imap_open_store_bail( ctx, FAIL_FINAL );
else if (response == RESP_OK)
imap_open_store_authenticate( ctx );
}
static void
imap_open_store_authenticate( imap_store_t *ctx )
{
#ifdef HAVE_LIBSSL
imap_store_conf_t *cfg = (imap_store_conf_t *)ctx->gen.conf;
imap_server_conf_t *srvc = cfg->server;
#endif
if (ctx->greeting != GreetingPreauth) {
#ifdef HAVE_LIBSSL
if (srvc->ssl_type == SSL_STARTTLS) {
if (CAP(STARTTLS)) {
imap_exec( ctx, 0, imap_open_store_authenticate_p2, "STARTTLS" );
return;
} else {
error( "IMAP error: SSL support not available\n" );
imap_open_store_bail( ctx, FAIL_FINAL );
return;
}
}
#endif
imap_open_store_authenticate2( ctx );
} else {
#ifdef HAVE_LIBSSL
if (srvc->ssl_type == SSL_STARTTLS) {
error( "IMAP error: SSL support not available\n" );
imap_open_store_bail( ctx, FAIL_FINAL );
return;
}
#endif
imap_open_store_compress( ctx );
}
}
#ifdef HAVE_LIBSSL
static void
imap_open_store_authenticate_p2( imap_store_t *ctx, struct imap_cmd *cmd ATTR_UNUSED, int response )
{
if (response == RESP_NO)
imap_open_store_bail( ctx, FAIL_FINAL );
else if (response == RESP_OK)
socket_start_tls( &ctx->conn, imap_open_store_tlsstarted2 );
}
static void
imap_open_store_tlsstarted2( int ok, void *aux )
{
imap_store_t *ctx = (imap_store_t *)aux;
if (!ok)
imap_open_store_ssl_bail( ctx );
else
imap_exec( ctx, 0, imap_open_store_authenticate_p3, "CAPABILITY" );
}
static void
imap_open_store_authenticate_p3( imap_store_t *ctx, struct imap_cmd *cmd ATTR_UNUSED, int response )
{
if (response == RESP_NO)
imap_open_store_bail( ctx, FAIL_FINAL );
else if (response == RESP_OK)
imap_open_store_authenticate2( ctx );
}
#endif
static const char *
ensure_user( imap_server_conf_t *srvc )
{
if (!srvc->user) {
error( "Skipping account %s, no user\n", srvc->name );
return 0;
}
return srvc->user;
}
static const char *
ensure_password( imap_server_conf_t *srvc )
{
char *cmd = srvc->pass_cmd;
if (cmd) {
FILE *fp;
int ret;
char buffer[80];
if (*cmd == '+') {
flushn();
cmd++;
}
if (!(fp = popen( cmd, "r" ))) {
pipeerr:
sys_error( "Skipping account %s, password command failed", srvc->name );
return 0;
}
if (!fgets( buffer, sizeof(buffer), fp ))
buffer[0] = 0;
if ((ret = pclose( fp )) < 0)
goto pipeerr;
if (ret) {
if (WIFSIGNALED( ret ))
error( "Skipping account %s, password command crashed\n", srvc->name );
else
error( "Skipping account %s, password command exited with status %d\n", srvc->name, WEXITSTATUS( ret ) );
return 0;
}
if (!buffer[0]) {
error( "Skipping account %s, password command produced no output\n", srvc->name );
return 0;
}
buffer[strcspn( buffer, "\n" )] = 0; /* Strip trailing newline */
free( srvc->pass ); /* From previous runs */
srvc->pass = nfstrdup( buffer );
} else if (!srvc->pass) {
char *pass, prompt[80];
flushn();
sprintf( prompt, "Password (%s): ", srvc->name );
pass = getpass( prompt );
if (!pass) {
perror( "getpass" );
exit( 1 );
}
if (!*pass) {
error( "Skipping account %s, no password\n", srvc->name );
return 0;
}
/* getpass() returns a pointer to a static buffer. Make a copy for long term storage. */
srvc->pass = nfstrdup( pass );
}
return srvc->pass;
}
#ifdef HAVE_LIBSASL
static sasl_callback_t sasl_callbacks[] = {
{ SASL_CB_USER, NULL, NULL },
{ SASL_CB_AUTHNAME, NULL, NULL },
{ SASL_CB_PASS, NULL, NULL },
{ SASL_CB_LIST_END, NULL, NULL }
};
static int
process_sasl_interact( sasl_interact_t *interact, imap_server_conf_t *srvc )
{
const char *val;
for (;; ++interact) {
switch (interact->id) {
case SASL_CB_LIST_END:
return 0;
case SASL_CB_USER:
case SASL_CB_AUTHNAME:
val = ensure_user( srvc );
break;
case SASL_CB_PASS:
val = ensure_password( srvc );
break;
default:
error( "Error: Unknown SASL interaction ID\n" );
return -1;
}
if (!val)
return -1;
interact->result = val;
interact->len = strlen( val );
}
}
static int
process_sasl_step( imap_store_t *ctx, int rc, const char *in, uint in_len,
sasl_interact_t *interact, const char **out, uint *out_len )
{
imap_server_conf_t *srvc = ((imap_store_conf_t *)ctx->gen.conf)->server;
while (rc == SASL_INTERACT) {
if (process_sasl_interact( interact, srvc ) < 0)
return -1;
rc = sasl_client_step( ctx->sasl, in, in_len, &interact, out, out_len );
}
if (rc == SASL_CONTINUE) {
ctx->sasl_cont = 1;
} else if (rc == SASL_OK) {
ctx->sasl_cont = 0;
} else {
error( "Error: %s\n", sasl_errdetail( ctx->sasl ) );
return -1;
}
return 0;
}
static int
decode_sasl_data( const char *prompt, char **in, uint *in_len )
{
if (prompt) {
int rc;
uint prompt_len = strlen( prompt );
/* We're decoding, the output will be shorter than prompt_len. */
*in = nfmalloc( prompt_len );
rc = sasl_decode64( prompt, prompt_len, *in, prompt_len, in_len );
if (rc != SASL_OK) {
free( *in );
error( "Error: SASL(%d): %s\n", rc, sasl_errstring( rc, NULL, NULL ) );
return -1;
}
} else {
*in = NULL;
*in_len = 0;
}
return 0;
}
static int
encode_sasl_data( const char *out, uint out_len, char **enc, uint *enc_len )
{
int rc;
uint enc_len_max = ((out_len + 2) / 3) * 4 + 1;
*enc = nfmalloc( enc_len_max );
rc = sasl_encode64( out, out_len, *enc, enc_len_max, enc_len );
if (rc != SASL_OK) {
free( *enc );
error( "Error: SASL(%d): %s\n", rc, sasl_errstring( rc, NULL, NULL ) );
return -1;
}
return 0;
}
static int
do_sasl_auth( imap_store_t *ctx, struct imap_cmd *cmdp ATTR_UNUSED, const char *prompt )
{
int rc, ret, iovcnt = 0;
uint in_len, out_len, enc_len;
const char *out;
char *in, *enc;
sasl_interact_t *interact = NULL;
conn_iovec_t iov[2];
if (!ctx->sasl_cont) {
error( "Error: IMAP wants more steps despite successful SASL authentication.\n" );
goto bail;
}
if (decode_sasl_data( prompt, &in, &in_len ) < 0)
goto bail;
rc = sasl_client_step( ctx->sasl, in, in_len, &interact, &out, &out_len );
ret = process_sasl_step( ctx, rc, in, in_len, interact, &out, &out_len );
free( in );
if (ret < 0)
goto bail;
if (out) {
if (encode_sasl_data( out, out_len, &enc, &enc_len ) < 0)
goto bail;
iov[0].buf = enc;
iov[0].len = enc_len;
iov[0].takeOwn = GiveOwn;
iovcnt = 1;
if (DFlags & DEBUG_NET) {
printf( "%s>+> %s\n", ctx->label, enc );
fflush( stdout );
}
} else {
if (DFlags & DEBUG_NET) {
printf( "%s>+>\n", ctx->label );
fflush( stdout );
}
}
iov[iovcnt].buf = "\r\n";
iov[iovcnt].len = 2;
iov[iovcnt].takeOwn = KeepOwn;
iovcnt++;
socket_write( &ctx->conn, iov, iovcnt );
return 0;
bail:
imap_open_store_bail( ctx, FAIL_FINAL );
return -1;
}
static void
done_sasl_auth( imap_store_t *ctx, struct imap_cmd *cmd ATTR_UNUSED, int response )
{
if (response == RESP_OK && ctx->sasl_cont) {
sasl_interact_t *interact = NULL;
const char *out;
uint out_len;
int rc = sasl_client_step( ctx->sasl, NULL, 0, &interact, &out, &out_len );
if (process_sasl_step( ctx, rc, NULL, 0, interact, &out, &out_len ) < 0)
warn( "Warning: SASL reported failure despite successful IMAP authentication. Ignoring...\n" );
else if (out)
warn( "Warning: SASL wants more steps despite successful IMAP authentication. Ignoring...\n" );
}
imap_open_store_authenticate2_p2( ctx, NULL, response );
}
#endif
static void
imap_open_store_authenticate2( imap_store_t *ctx )
{
imap_store_conf_t *cfg = (imap_store_conf_t *)ctx->gen.conf;
imap_server_conf_t *srvc = cfg->server;
string_list_t *mech, *cmech;
int auth_login = 0;
#ifdef HAVE_LIBSASL
const char *saslavail;
char saslmechs[1024], *saslend = saslmechs;
#endif
info( "Logging in...\n" );
for (mech = srvc->auth_mechs; mech; mech = mech->next) {
int any = !strcmp( mech->string, "*" );
for (cmech = ctx->auth_mechs; cmech; cmech = cmech->next) {
if (any || !strcasecmp( mech->string, cmech->string )) {
if (!strcasecmp( cmech->string, "LOGIN" )) {
#ifdef HAVE_LIBSSL
if (ctx->conn.ssl || !any)
#endif
auth_login = 1;
#ifdef HAVE_LIBSASL
} else {
int len = strlen( cmech->string );
if (saslend + len + 2 > saslmechs + sizeof(saslmechs))
oob();
*saslend++ = ' ';
memcpy( saslend, cmech->string, len + 1 );
saslend += len;
#endif
}
}
}
}
#ifdef HAVE_LIBSASL
if (saslend != saslmechs) {
int rc;
uint out_len = 0;
char *enc = NULL;
const char *gotmech = NULL, *out = NULL;
sasl_interact_t *interact = NULL;
struct imap_cmd *cmd;
static int sasl_inited;
if (!sasl_inited) {
rc = sasl_client_init( sasl_callbacks );
if (rc != SASL_OK) {
saslbail:
error( "Error: SASL(%d): %s\n", rc, sasl_errstring( rc, NULL, NULL ) );
goto bail;
}
sasl_inited = 1;
}
rc = sasl_client_new( "imap", srvc->sconf.host, NULL, NULL, NULL, 0, &ctx->sasl );
if (rc != SASL_OK) {
if (rc == SASL_NOMECH)
goto notsasl;
if (!ctx->sasl)
goto saslbail;
error( "Error: %s\n", sasl_errdetail( ctx->sasl ) );
goto bail;
}
rc = sasl_client_start( ctx->sasl, saslmechs + 1, &interact, CAP(SASLIR) ? &out : NULL, &out_len, &gotmech );
if (rc == SASL_NOMECH)
goto notsasl;
if (gotmech)
info( "Authenticating with SASL mechanism %s...\n", gotmech );
/* Technically, we are supposed to loop over sasl_client_start(),
* but it just calls sasl_client_step() anyway. */
if (process_sasl_step( ctx, rc, NULL, 0, interact, CAP(SASLIR) ? &out : NULL, &out_len ) < 0)
goto bail;
if (out) {
if (!out_len)
enc = nfstrdup( "=" ); /* A zero-length initial response is encoded as padding. */
else if (encode_sasl_data( out, out_len, &enc, NULL ) < 0)
goto bail;
}
cmd = new_imap_cmd( sizeof(*cmd) );
cmd->param.cont = do_sasl_auth;
imap_exec( ctx, cmd, done_sasl_auth, enc ? "AUTHENTICATE %s %s" : "AUTHENTICATE %s", gotmech, enc );
free( enc );
return;
notsasl:
if (!ctx->sasl || sasl_listmech( ctx->sasl, NULL, "", "", "", &saslavail, NULL, NULL ) != SASL_OK)
saslavail = "(none)"; /* EXTERNAL is always there anyway. */
if (!auth_login) {
error( "IMAP error: selected SASL mechanism(s) not available;\n"
" selected:%s\n available: %s\n", saslmechs, saslavail );
goto bail;
}
info( "NOT using available SASL mechanism(s): %s\n", saslavail );
sasl_dispose( &ctx->sasl );
}
#endif
if (auth_login) {
if (!ensure_user( srvc ) || !ensure_password( srvc ))
goto bail;
#ifdef HAVE_LIBSSL
if (!ctx->conn.ssl)
#endif
warn( "*** IMAP Warning *** Password is being sent in the clear\n" );
imap_exec( ctx, 0, imap_open_store_authenticate2_p2,
"LOGIN \"%\\s\" \"%\\s\"", srvc->user, srvc->pass );
return;
}
error( "IMAP error: server supports no acceptable authentication mechanism\n" );
bail:
imap_open_store_bail( ctx, FAIL_FINAL );
}
static void
imap_open_store_authenticate2_p2( imap_store_t *ctx, struct imap_cmd *cmd ATTR_UNUSED, int response )
{
if (response == RESP_NO)
imap_open_store_bail( ctx, FAIL_FINAL );
else if (response == RESP_OK)
imap_open_store_compress( ctx );
}
static void
imap_open_store_compress( imap_store_t *ctx )
{
#ifdef HAVE_LIBZ
if (CAP(COMPRESS_DEFLATE)) {
imap_exec( ctx, 0, imap_open_store_compress_p2, "COMPRESS DEFLATE" );
return;
}
#endif
imap_open_store_namespace( ctx );
}
#ifdef HAVE_LIBZ
static void
imap_open_store_compress_p2( imap_store_t *ctx, struct imap_cmd *cmd ATTR_UNUSED, int response )
{
if (response == RESP_NO) {
/* We already reported an error, but it's not fatal to us. */
imap_open_store_namespace( ctx );
} else if (response == RESP_OK) {
socket_start_deflate( &ctx->conn );
imap_open_store_namespace( ctx );
}
}
#endif
static void
imap_open_store_namespace( imap_store_t *ctx )
{
imap_store_conf_t *cfg = (imap_store_conf_t *)ctx->gen.conf;
ctx->prefix = cfg->gen.path;
ctx->delimiter = cfg->delimiter ? nfstrdup( cfg->delimiter ) : 0;
if (((!ctx->prefix && cfg->use_namespace) || !cfg->delimiter) && CAP(NAMESPACE)) {
/* get NAMESPACE info */
if (!ctx->got_namespace)
imap_exec( ctx, 0, imap_open_store_namespace_p2, "NAMESPACE" );
else
imap_open_store_namespace2( ctx );
return;
}
imap_open_store_finalize( ctx );
}
static void
imap_open_store_namespace_p2( imap_store_t *ctx, struct imap_cmd *cmd ATTR_UNUSED, int response )
{
if (response == RESP_NO) {
imap_open_store_bail( ctx, FAIL_FINAL );
} else if (response == RESP_OK) {
ctx->got_namespace = 1;
imap_open_store_namespace2( ctx );
}
}
static void
imap_open_store_namespace2( imap_store_t *ctx )
{
imap_store_conf_t *cfg = (imap_store_conf_t *)ctx->gen.conf;
list_t *nsp, *nsp_1st, *nsp_1st_ns, *nsp_1st_dl;
/* XXX for now assume 1st personal namespace */
if (is_list( (nsp = ctx->ns_personal) ) &&
is_list( (nsp_1st = nsp->child) ) &&
is_atom( (nsp_1st_ns = nsp_1st->child) ) &&
is_atom( (nsp_1st_dl = nsp_1st_ns->next) ))
{
if (!ctx->prefix && cfg->use_namespace)
ctx->prefix = nsp_1st_ns->val;
if (!ctx->delimiter)
ctx->delimiter = nfstrdup( nsp_1st_dl->val );
imap_open_store_finalize( ctx );
} else {
imap_open_store_bail( ctx, FAIL_FINAL );
}
}
static void
imap_open_store_finalize( imap_store_t *ctx )
{
set_bad_callback( &ctx->gen, 0, 0 );
if (!ctx->prefix)
ctx->prefix = "";
ctx->trashnc = TrashUnknown;
ctx->callbacks.imap_open( &ctx->gen, ctx->callback_aux );
}
#ifdef HAVE_LIBSSL
static void
imap_open_store_ssl_bail( imap_store_t *ctx )
{
/* This avoids that we try to send LOGOUT to an unusable socket. */
socket_close( &ctx->conn );
imap_open_store_bail( ctx, FAIL_FINAL );
}
#endif
static void
imap_open_store_bail( imap_store_t *ctx, int failed )
{
void (*cb)( store_t *srv, void *aux ) = ctx->callbacks.imap_open;
void *aux = ctx->callback_aux;
((imap_store_conf_t *)ctx->gen.conf)->server->failed = failed;
imap_cancel_store( &ctx->gen );
cb( 0, aux );
}
/******************* imap_open_box *******************/
static int
imap_select_box( store_t *gctx, const char *name )
{
imap_store_t *ctx = (imap_store_t *)gctx;
free_generic_messages( gctx->msgs );
gctx->msgs = 0;
ctx->msgapp = &gctx->msgs;
ctx->name = name;
return DRV_OK;
}
static void
imap_open_box( store_t *gctx,
void (*cb)( int sts, void *aux ), void *aux )
{
imap_store_t *ctx = (imap_store_t *)gctx;
struct imap_cmd_simple *cmd;
char *buf;
if (prepare_box( &buf, ctx ) < 0) {
cb( DRV_BOX_BAD, aux );
return;
}
ctx->gen.uidnext = 0;
INIT_IMAP_CMD(imap_cmd_simple, cmd, cb, aux)
cmd->gen.param.failok = 1;
imap_exec( ctx, &cmd->gen, imap_done_simple_box,
"SELECT \"%\\s\"", buf );
free( buf );
}
/******************* imap_create_box *******************/
static void
imap_create_box( store_t *gctx,
void (*cb)( int sts, void *aux ), void *aux )
{
imap_store_t *ctx = (imap_store_t *)gctx;
struct imap_cmd_simple *cmd;
char *buf;
if (prepare_box( &buf, ctx ) < 0) {
cb( DRV_BOX_BAD, aux );
return;
}
INIT_IMAP_CMD(imap_cmd_simple, cmd, cb, aux)
imap_exec( ctx, &cmd->gen, imap_done_simple_box,
"CREATE \"%\\s\"", buf );
free( buf );
}
/******************* imap_delete_box *******************/
static int
imap_confirm_box_empty( store_t *gctx )
{
return gctx->count ? DRV_BOX_BAD : DRV_OK;
}
static void imap_delete_box_p2( imap_store_t *, struct imap_cmd *, int );
static void
imap_delete_box( store_t *gctx,
void (*cb)( int sts, void *aux ), void *aux )
{
imap_store_t *ctx = (imap_store_t *)gctx;
struct imap_cmd_simple *cmd;
INIT_IMAP_CMD(imap_cmd_simple, cmd, cb, aux)
imap_exec( ctx, &cmd->gen, imap_delete_box_p2, "CLOSE" );
}
static void
imap_delete_box_p2( imap_store_t *ctx, struct imap_cmd *gcmd, int response )
{
struct imap_cmd_simple *cmdp = (struct imap_cmd_simple *)gcmd;
struct imap_cmd_simple *cmd;
char *buf;
if (response != RESP_OK) {
imap_done_simple_box( ctx, &cmdp->gen, response );
return;
}
if (prepare_box( &buf, ctx ) < 0) {
imap_done_simple_box( ctx, &cmdp->gen, RESP_NO );
return;
}
INIT_IMAP_CMD(imap_cmd_simple, cmd, cmdp->callback, cmdp->callback_aux)
imap_exec( ctx, &cmd->gen, imap_done_simple_box,
"DELETE \"%\\s\"", buf );
free( buf );
}
static int
imap_finish_delete_box( store_t *gctx ATTR_UNUSED )
{
return DRV_OK;
}
/******************* imap_load_box *******************/
static void
imap_prepare_load_box( store_t *gctx, int opts )
{
gctx->opts = opts;
}
static void imap_submit_load( imap_store_t *, const char *, int, struct imap_cmd_refcounted_state * );
static void
imap_load_box( store_t *gctx, int minuid, int maxuid, int newuid, int *excs, int nexcs,
void (*cb)( int sts, void *aux ), void *aux )
{
imap_store_t *ctx = (imap_store_t *)gctx;
int i, j, bl;
char buf[1000];
if (!ctx->gen.count) {
free( excs );
cb( DRV_OK, aux );
} else {
struct imap_cmd_refcounted_state *sts = imap_refcounted_new_state( cb, aux );
sort_ints( excs, nexcs );
for (i = 0; i < nexcs; ) {
for (bl = 0; i < nexcs && bl < 960; i++) {
if (bl)
buf[bl++] = ',';
bl += sprintf( buf + bl, "%d", excs[i] );
j = i;
for (; i + 1 < nexcs && excs[i + 1] == excs[i] + 1; i++) {}
if (i != j)
bl += sprintf( buf + bl, ":%d", excs[i] );
}
imap_submit_load( ctx, buf, 0, sts );
}
if (maxuid == INT_MAX)
maxuid = ctx->gen.uidnext ? ctx->gen.uidnext - 1 : 0x7fffffff;
if (maxuid >= minuid) {
if ((ctx->gen.opts & OPEN_FIND) && minuid < newuid) {
sprintf( buf, "%d:%d", minuid, newuid - 1 );
imap_submit_load( ctx, buf, 0, sts );
if (newuid > maxuid)
goto done;
sprintf( buf, "%d:%d", newuid, maxuid );
} else {
sprintf( buf, "%d:%d", minuid, maxuid );
}
imap_submit_load( ctx, buf, (ctx->gen.opts & OPEN_FIND), sts );
}
done:
free( excs );
imap_refcounted_done( sts );
}
}
static void
imap_submit_load( imap_store_t *ctx, const char *buf, int tuids, struct imap_cmd_refcounted_state *sts )
{
imap_exec( ctx, imap_refcounted_new_cmd( sts ), imap_refcounted_done_box,
"UID FETCH %s (UID%s%s%s)", buf,
(ctx->gen.opts & OPEN_FLAGS) ? " FLAGS" : "",
(ctx->gen.opts & OPEN_SIZE) ? " RFC822.SIZE" : "",
tuids ? " BODY.PEEK[HEADER.FIELDS (X-TUID)]" : "");
}
/******************* imap_fetch_msg *******************/
static void imap_fetch_msg_p2( imap_store_t *ctx, struct imap_cmd *gcmd, int response );
static void
imap_fetch_msg( store_t *ctx, message_t *msg, msg_data_t *data,
void (*cb)( int sts, void *aux ), void *aux )
{
struct imap_cmd_fetch_msg *cmd;
INIT_IMAP_CMD_X(imap_cmd_fetch_msg, cmd, cb, aux)
cmd->gen.gen.param.uid = msg->uid;
cmd->msg_data = data;
data->data = 0;
imap_exec( (imap_store_t *)ctx, &cmd->gen.gen, imap_fetch_msg_p2,
"UID FETCH %d (%s%sBODY.PEEK[])", msg->uid,
!(msg->status & M_FLAGS) ? "FLAGS " : "",
(data->date== -1) ? "INTERNALDATE " : "" );
}
static void
imap_fetch_msg_p2( imap_store_t *ctx, struct imap_cmd *gcmd, int response )
{
struct imap_cmd_fetch_msg *cmd = (struct imap_cmd_fetch_msg *)gcmd;
if (response == RESP_OK && !cmd->msg_data->data) {
/* The FETCH succeeded, but there is no message with this UID. */
response = RESP_NO;
}
imap_done_simple_msg( ctx, gcmd, response );
}
/******************* imap_set_msg_flags *******************/
static void imap_set_flags_p2( imap_store_t *, struct imap_cmd *, int );
static int
imap_make_flags( int flags, char *buf )
{
const char *s;
uint i, d;
for (i = d = 0; i < as(Flags); i++)
if (flags & (1 << i)) {
buf[d++] = ' ';
buf[d++] = '\\';
for (s = Flags[i]; *s; s++)
buf[d++] = *s;
}
buf[0] = '(';
buf[d++] = ')';
return d;
}
static void
imap_flags_helper( imap_store_t *ctx, int uid, char what, int flags,
struct imap_cmd_refcounted_state *sts )
{
char buf[256];
buf[imap_make_flags( flags, buf )] = 0;
imap_exec( ctx, imap_refcounted_new_cmd( sts ), imap_set_flags_p2,
"UID STORE %d %cFLAGS.SILENT %s", uid, what, buf );
}
static void
imap_set_msg_flags( store_t *gctx, message_t *msg, int uid, int add, int del,
void (*cb)( int sts, void *aux ), void *aux )
{
imap_store_t *ctx = (imap_store_t *)gctx;
if (msg) {
uid = msg->uid;
add &= ~msg->flags;
del &= msg->flags;
msg->flags |= add;
msg->flags &= ~del;
}
if (add || del) {
struct imap_cmd_refcounted_state *sts = imap_refcounted_new_state( cb, aux );
if (add)
imap_flags_helper( ctx, uid, '+', add, sts );
if (del)
imap_flags_helper( ctx, uid, '-', del, sts );
imap_refcounted_done( sts );
} else {
cb( DRV_OK, aux );
}
}
static void
imap_set_flags_p2( imap_store_t *ctx ATTR_UNUSED, struct imap_cmd *cmd, int response )
{
struct imap_cmd_refcounted_state *sts = ((struct imap_cmd_refcounted *)cmd)->state;
switch (response) {
case RESP_CANCEL:
sts->ret_val = DRV_CANCELED;
break;
case RESP_NO:
if (sts->ret_val == DRV_OK) /* Don't override cancelation. */
sts->ret_val = DRV_MSG_BAD;
break;
}
imap_refcounted_done( sts );
}
/******************* imap_close_box *******************/
static void
imap_close_box( store_t *gctx,
void (*cb)( int sts, void *aux ), void *aux )
{
imap_store_t *ctx = (imap_store_t *)gctx;
if (ctx->gen.conf->trash && CAP(UIDPLUS)) {
struct imap_cmd_refcounted_state *sts = imap_refcounted_new_state( cb, aux );
message_t *msg, *fmsg, *nmsg;
int bl;
char buf[1000];
for (msg = ctx->gen.msgs; ; ) {
for (bl = 0; msg && bl < 960; msg = msg->next) {
if (!(msg->flags & F_DELETED))
continue;
if (bl)
buf[bl++] = ',';
bl += sprintf( buf + bl, "%d", msg->uid );
fmsg = msg;
for (; (nmsg = msg->next) && (nmsg->flags & F_DELETED); msg = nmsg) {}
if (msg != fmsg)
bl += sprintf( buf + bl, ":%d", msg->uid );
}
if (!bl)
break;
imap_exec( ctx, imap_refcounted_new_cmd( sts ), imap_refcounted_done_box,
"UID EXPUNGE %s", buf );
}
imap_refcounted_done( sts );
} else {
/* This is inherently racy: it may cause messages which other clients
* marked as deleted to be expunged without being trashed. */
struct imap_cmd_simple *cmd;
INIT_IMAP_CMD(imap_cmd_simple, cmd, cb, aux)
imap_exec( ctx, &cmd->gen, imap_done_simple_box, "CLOSE" );
}
}
/******************* imap_trash_msg *******************/
static void
imap_trash_msg( store_t *gctx, message_t *msg,
void (*cb)( int sts, void *aux ), void *aux )
{
imap_store_t *ctx = (imap_store_t *)gctx;
struct imap_cmd_simple *cmd;
char *buf;
INIT_IMAP_CMD(imap_cmd_simple, cmd, cb, aux)
cmd->gen.param.create = 1;
cmd->gen.param.to_trash = 1;
if (prepare_trash( &buf, ctx ) < 0) {
cb( DRV_BOX_BAD, aux );
return;
}
imap_exec( ctx, &cmd->gen, imap_done_simple_msg,
CAP(MOVE) ? "UID MOVE %d \"%\\s\"" : "UID COPY %d \"%\\s\"", msg->uid, buf );
free( buf );
}
/******************* imap_store_msg *******************/
static void imap_store_msg_p2( imap_store_t *, struct imap_cmd *, int );
static size_t
my_strftime( char *s, size_t max, const char *fmt, const struct tm *tm )
{
return strftime( s, max, fmt, tm );
}
static void
imap_store_msg( store_t *gctx, msg_data_t *data, int to_trash,
void (*cb)( int sts, int uid, void *aux ), void *aux )
{
imap_store_t *ctx = (imap_store_t *)gctx;
struct imap_cmd_out_uid *cmd;
char *buf;
int d;
char flagstr[128], datestr[64];
d = 0;
if (data->flags) {
d = imap_make_flags( data->flags, flagstr );
flagstr[d++] = ' ';
}
flagstr[d] = 0;
INIT_IMAP_CMD(imap_cmd_out_uid, cmd, cb, aux)
ctx->buffer_mem += data->len;
cmd->gen.param.data_len = data->len;
cmd->gen.param.data = data->data;
cmd->out_uid = -2;
if (to_trash) {
cmd->gen.param.create = 1;
cmd->gen.param.to_trash = 1;
if (prepare_trash( &buf, ctx ) < 0) {
cb( DRV_BOX_BAD, -1, aux );
return;
}
} else {
if (prepare_box( &buf, ctx ) < 0) {
cb( DRV_BOX_BAD, -1, aux );
return;
}
}
if (data->date) {
/* configure ensures that %z actually works. */
my_strftime( datestr, sizeof(datestr), "%d-%b-%Y %H:%M:%S %z", localtime( &data->date ) );
imap_exec( ctx, &cmd->gen, imap_store_msg_p2,
"APPEND \"%\\s\" %s\"%\\s\" ", buf, flagstr, datestr );
} else {
imap_exec( ctx, &cmd->gen, imap_store_msg_p2,
"APPEND \"%\\s\" %s", buf, flagstr );
}
free( buf );
}
static void
imap_store_msg_p2( imap_store_t *ctx ATTR_UNUSED, struct imap_cmd *cmd, int response )
{
struct imap_cmd_out_uid *cmdp = (struct imap_cmd_out_uid *)cmd;
transform_msg_response( &response );
cmdp->callback( response, cmdp->out_uid, cmdp->callback_aux );
}
/******************* imap_find_new_msgs *******************/
static void imap_find_new_msgs_p2( imap_store_t *, struct imap_cmd *, int );
static void
imap_find_new_msgs( store_t *gctx, int newuid,
void (*cb)( int sts, void *aux ), void *aux )
{
imap_store_t *ctx = (imap_store_t *)gctx;
struct imap_cmd_find_new *cmd;
INIT_IMAP_CMD_X(imap_cmd_find_new, cmd, cb, aux)
cmd->uid = newuid;
imap_exec( (imap_store_t *)ctx, &cmd->gen.gen, imap_find_new_msgs_p2, "CHECK" );
}
static void
imap_find_new_msgs_p2( imap_store_t *ctx, struct imap_cmd *gcmd, int response )
{
struct imap_cmd_find_new *cmdp = (struct imap_cmd_find_new *)gcmd;
struct imap_cmd_simple *cmd;
if (response != RESP_OK) {
imap_done_simple_box( ctx, gcmd, response );
return;
}
INIT_IMAP_CMD(imap_cmd_simple, cmd, cmdp->gen.callback, cmdp->gen.callback_aux)
imap_exec( (imap_store_t *)ctx, &cmd->gen, imap_done_simple_box,
"UID FETCH %d:1000000000 (UID BODY.PEEK[HEADER.FIELDS (X-TUID)])", cmdp->uid );
}
/******************* imap_list_store *******************/
static void
imap_list_store( store_t *gctx, int flags,
void (*cb)( int sts, void *aux ), void *aux )
{
imap_store_t *ctx = (imap_store_t *)gctx;
struct imap_cmd_refcounted_state *sts = imap_refcounted_new_state( cb, aux );
if ((flags & LIST_PATH) && (!(flags & LIST_INBOX) || !is_inbox( ctx, ctx->prefix, -1 )))
imap_exec( ctx, imap_refcounted_new_cmd( sts ), imap_refcounted_done_box,
"LIST \"\" \"%\\s*\"", ctx->prefix );
if ((flags & LIST_INBOX) && (!(flags & LIST_PATH) || *ctx->prefix))
imap_exec( ctx, imap_refcounted_new_cmd( sts ), imap_refcounted_done_box,
"LIST \"\" INBOX*" );
imap_refcounted_done( sts );
}
/******************* imap_cancel_cmds *******************/
static void
imap_cancel_cmds( store_t *gctx,
void (*cb)( void *aux ), void *aux )
{
imap_store_t *ctx = (imap_store_t *)gctx;
cancel_pending_imap_cmds( ctx );
if (ctx->in_progress) {
ctx->canceling = 1;
ctx->callbacks.imap_cancel = cb;
ctx->callback_aux = aux;
} else {
cb( aux );
}
}
/******************* imap_commit_cmds *******************/
static void
imap_commit_cmds( store_t *gctx )
{
(void)gctx;
}
/******************* imap_memory_usage *******************/
static int
imap_memory_usage( store_t *gctx )
{
imap_store_t *ctx = (imap_store_t *)gctx;
return ctx->buffer_mem + ctx->conn.buffer_mem;
}
/******************* imap_fail_state *******************/
static int
imap_fail_state( store_conf_t *gconf )
{
return ((imap_store_conf_t *)gconf)->server->failed;
}
/******************* imap_parse_store *******************/
imap_server_conf_t *servers, **serverapp = &servers;
static int
imap_parse_store( conffile_t *cfg, store_conf_t **storep )
{
imap_store_conf_t *store;
imap_server_conf_t *server, *srv, sserver;
const char *type, *name, *arg;
int acc_opt = 0;
#ifdef HAVE_LIBSSL
/* Legacy SSL options */
int require_ssl = -1, use_imaps = -1;
int use_sslv2 = -1, use_sslv3 = -1, use_tlsv1 = -1, use_tlsv11 = -1, use_tlsv12 = -1;
#endif
/* Legacy SASL option */
int require_cram = -1;
if (!strcasecmp( "IMAPAccount", cfg->cmd )) {
server = nfcalloc( sizeof(*server) );
server->name = nfstrdup( cfg->val );
*serverapp = server;
serverapp = &server->next;
store = 0;
*storep = 0;
} else if (!strcasecmp( "IMAPStore", cfg->cmd )) {
store = nfcalloc( sizeof(*store) );
store->gen.driver = &imap_driver;
store->gen.name = nfstrdup( cfg->val );
store->use_namespace = 1;
*storep = &store->gen;
memset( &sserver, 0, sizeof(sserver) );
server = &sserver;
} else
return 0;
#ifdef HAVE_LIBSSL
server->ssl_type = -1;
server->sconf.ssl_versions = -1;
server->sconf.system_certs = 1;
#endif
server->max_in_progress = INT_MAX;
while (getcline( cfg ) && cfg->cmd) {
if (!strcasecmp( "Host", cfg->cmd )) {
/* The imap[s]: syntax is just a backwards compat hack. */
arg = cfg->val;
#ifdef HAVE_LIBSSL
if (starts_with( arg, -1, "imaps:", 6 )) {
arg += 6;
server->ssl_type = SSL_IMAPS;
if (server->sconf.ssl_versions == -1)
server->sconf.ssl_versions = SSLv2 | SSLv3 | TLSv1;
} else
#endif
if (starts_with( arg, -1, "imap:", 5 ))
arg += 5;
if (starts_with( arg, -1, "//", 2 ))
arg += 2;
if (arg != cfg->val)
warn( "%s:%d: Notice: URL notation is deprecated; use a plain host name and possibly 'SSLType IMAPS' instead\n", cfg->file, cfg->line );
server->sconf.host = nfstrdup( arg );
}
else if (!strcasecmp( "User", cfg->cmd ))
server->user = nfstrdup( cfg->val );
else if (!strcasecmp( "Pass", cfg->cmd ))
server->pass = nfstrdup( cfg->val );
else if (!strcasecmp( "PassCmd", cfg->cmd ))
server->pass_cmd = nfstrdup( cfg->val );
else if (!strcasecmp( "Port", cfg->cmd ))
server->sconf.port = parse_int( cfg );
else if (!strcasecmp( "PipelineDepth", cfg->cmd )) {
if ((server->max_in_progress = parse_int( cfg )) < 1) {
error( "%s:%d: PipelineDepth must be at least 1\n", cfg->file, cfg->line );
cfg->err = 1;
}
}
#ifdef HAVE_LIBSSL
else if (!strcasecmp( "CertificateFile", cfg->cmd )) {
server->sconf.cert_file = expand_strdup( cfg->val );
if (access( server->sconf.cert_file, R_OK )) {
sys_error( "%s:%d: CertificateFile '%s'",
cfg->file, cfg->line, server->sconf.cert_file );
cfg->err = 1;
}
} else if (!strcasecmp( "SystemCertificates", cfg->cmd )) {
server->sconf.system_certs = parse_bool( cfg );
} else if (!strcasecmp( "SSLType", cfg->cmd )) {
if (!strcasecmp( "None", cfg->val )) {
server->ssl_type = SSL_None;
} else if (!strcasecmp( "STARTTLS", cfg->val )) {
server->ssl_type = SSL_STARTTLS;
} else if (!strcasecmp( "IMAPS", cfg->val )) {
server->ssl_type = SSL_IMAPS;
} else {
error( "%s:%d: Invalid SSL type\n", cfg->file, cfg->line );
cfg->err = 1;
}
} else if (!strcasecmp( "SSLVersion", cfg->cmd ) ||
!strcasecmp( "SSLVersions", cfg->cmd )) {
server->sconf.ssl_versions = 0;
arg = cfg->val;
do {
if (!strcasecmp( "SSLv2", arg )) {
server->sconf.ssl_versions |= SSLv2;
} else if (!strcasecmp( "SSLv3", arg )) {
server->sconf.ssl_versions |= SSLv3;
} else if (!strcasecmp( "TLSv1", arg )) {
server->sconf.ssl_versions |= TLSv1;
} else if (!strcasecmp( "TLSv1.1", arg )) {
server->sconf.ssl_versions |= TLSv1_1;
} else if (!strcasecmp( "TLSv1.2", arg )) {
server->sconf.ssl_versions |= TLSv1_2;
} else {
error( "%s:%d: Unrecognized SSL version\n", cfg->file, cfg->line );
cfg->err = 1;
}
} while ((arg = get_arg( cfg, ARG_OPTIONAL, 0 )));
} else if (!strcasecmp( "RequireSSL", cfg->cmd ))
require_ssl = parse_bool( cfg );
else if (!strcasecmp( "UseIMAPS", cfg->cmd ))
use_imaps = parse_bool( cfg );
else if (!strcasecmp( "UseSSLv2", cfg->cmd ))
use_sslv2 = parse_bool( cfg );
else if (!strcasecmp( "UseSSLv3", cfg->cmd ))
use_sslv3 = parse_bool( cfg );
else if (!strcasecmp( "UseTLSv1", cfg->cmd ))
use_tlsv1 = parse_bool( cfg );
else if (!strcasecmp( "UseTLSv1.1", cfg->cmd ))
use_tlsv11 = parse_bool( cfg );
else if (!strcasecmp( "UseTLSv1.2", cfg->cmd ))
use_tlsv12 = parse_bool( cfg );
#endif
else if (!strcasecmp( "AuthMech", cfg->cmd ) ||
!strcasecmp( "AuthMechs", cfg->cmd )) {
arg = cfg->val;
do
add_string_list( &server->auth_mechs, arg );
while ((arg = get_arg( cfg, ARG_OPTIONAL, 0 )));
} else if (!strcasecmp( "RequireCRAM", cfg->cmd ))
require_cram = parse_bool( cfg );
else if (!strcasecmp( "Tunnel", cfg->cmd ))
server->sconf.tunnel = nfstrdup( cfg->val );
else if (store) {
if (!strcasecmp( "Account", cfg->cmd )) {
for (srv = servers; srv; srv = srv->next)
if (srv->name && !strcmp( srv->name, cfg->val ))
goto gotsrv;
error( "%s:%d: unknown IMAP account '%s'\n", cfg->file, cfg->line, cfg->val );
cfg->err = 1;
continue;
gotsrv:
store->server = srv;
} else if (!strcasecmp( "UseNamespace", cfg->cmd ))
store->use_namespace = parse_bool( cfg );
else if (!strcasecmp( "Path", cfg->cmd ))
store->gen.path = nfstrdup( cfg->val );
else if (!strcasecmp( "PathDelimiter", cfg->cmd ))
store->delimiter = nfstrdup( cfg->val );
else
parse_generic_store( &store->gen, cfg );
continue;
} else {
error( "%s:%d: unknown/misplaced keyword '%s'\n", cfg->file, cfg->line, cfg->cmd );
cfg->err = 1;
continue;
}
acc_opt = 1;
}
if (store)
type = "IMAP store", name = store->gen.name;
else
type = "IMAP account", name = server->name;
if (!store || !store->server) {
if (!server->sconf.tunnel && !server->sconf.host) {
error( "%s '%s' has neither Tunnel nor Host\n", type, name );
cfg->err = 1;
return 1;
}
if (server->pass && server->pass_cmd) {
error( "%s '%s' has both Pass and PassCmd\n", type, name );
cfg->err = 1;
return 1;
}
#ifdef HAVE_LIBSSL
if ((use_sslv2 & use_sslv3 & use_tlsv1 & use_tlsv11 & use_tlsv12) != -1 || use_imaps >= 0 || require_ssl >= 0) {
if (server->ssl_type >= 0 || server->sconf.ssl_versions >= 0) {
error( "%s '%s': The deprecated UseSSL*, UseTLS*, UseIMAPS, and RequireSSL options are mutually exlusive with SSLType and SSLVersions.\n", type, name );
cfg->err = 1;
return 1;
}
warn( "Notice: %s '%s': UseSSL*, UseTLS*, UseIMAPS, and RequireSSL are deprecated. Use SSLType and SSLVersions instead.\n", type, name );
server->sconf.ssl_versions =
(use_sslv2 != 1 ? 0 : SSLv2) |
(use_sslv3 != 1 ? 0 : SSLv3) |
(use_tlsv1 == 0 ? 0 : TLSv1) |
(use_tlsv11 != 1 ? 0 : TLSv1_1) |
(use_tlsv12 != 1 ? 0 : TLSv1_2);
if (use_imaps == 1) {
server->ssl_type = SSL_IMAPS;
} else if (require_ssl) {
server->ssl_type = SSL_STARTTLS;
} else if (!server->sconf.ssl_versions) {
server->ssl_type = SSL_None;
} else {
warn( "Notice: %s '%s': 'RequireSSL no' is being ignored\n", type, name );
server->ssl_type = SSL_STARTTLS;
}
if (server->ssl_type != SSL_None && !server->sconf.ssl_versions) {
error( "%s '%s' requires SSL but no SSL versions enabled\n", type, name );
cfg->err = 1;
return 1;
}
} else {
if (server->sconf.ssl_versions < 0)
server->sconf.ssl_versions = TLSv1; /* Most compatible and still reasonably secure. */
if (server->ssl_type < 0)
server->ssl_type = server->sconf.tunnel ? SSL_None : SSL_STARTTLS;
}
#endif
if (require_cram >= 0) {
if (server->auth_mechs) {
error( "%s '%s': The deprecated RequireCRAM option is mutually exlusive with AuthMech.\n", type, name );
cfg->err = 1;
return 1;
}
warn( "Notice: %s '%s': RequireCRAM is deprecated. Use AuthMech instead.\n", type, name );
if (require_cram)
add_string_list(&server->auth_mechs, "CRAM-MD5");
}
if (!server->auth_mechs)
add_string_list( &server->auth_mechs, "*" );
if (!server->sconf.port)
server->sconf.port =
#ifdef HAVE_LIBSSL
server->ssl_type == SSL_IMAPS ? 993 :
#endif
143;
}
if (store) {
if (!store->server) {
store->server = nfmalloc( sizeof(sserver) );
memcpy( store->server, &sserver, sizeof(sserver) );
store->server->name = store->gen.name;
} else if (acc_opt) {
error( "%s '%s' has both Account and account-specific options\n", type, name );
cfg->err = 1;
}
}
return 1;
}
struct driver imap_driver = {
DRV_CRLF | DRV_VERBOSE,
imap_parse_store,
imap_cleanup,
imap_open_store,
imap_disown_store,
imap_cancel_store,
imap_list_store,
imap_select_box,
imap_create_box,
imap_open_box,
imap_confirm_box_empty,
imap_delete_box,
imap_finish_delete_box,
imap_prepare_load_box,
imap_load_box,
imap_fetch_msg,
imap_store_msg,
imap_find_new_msgs,
imap_set_msg_flags,
imap_trash_msg,
imap_close_box,
imap_cancel_cmds,
imap_commit_cmds,
imap_memory_usage,
imap_fail_state,
};
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