commit 45b11c63a503dd53674ead6f8617af61e7563b78
Author: Oswald Buddenhagen <[email protected]>
Date: Tue Oct 16 09:27:58 2012 +0200
more error checking of IMAP responses
REFMAIL: CA+Tk8fyu-6bwXq=ee2BgcKK_13m9S0RS+-0DhM=_jfqskch...@mail.gmail.com
src/drv_imap.c | 48 +++++++++++++++++++++++++++++++++---------------
1 files changed, 33 insertions(+), 15 deletions(-)
diff --git a/src/drv_imap.c b/src/drv_imap.c
index 50a3eb2..3e10897 100644
--- a/src/drv_imap.c
+++ b/src/drv_imap.c
@@ -535,6 +535,8 @@ parse_imap_list( imap_store_t *ctx, char **sp,
parse_list_state_t *sts )
goto getbytes;
}
+ if (!s)
+ return LIST_BAD;
for (;;) {
while (isspace( (unsigned char)*s ))
s++;
@@ -785,7 +787,7 @@ parse_response_code( imap_store_t *ctx, struct imap_cmd
*cmd, char *s )
{
char *arg, *earg, *p;
- if (*s != '[')
+ if (!s || *s != '[')
return RESP_OK; /* no response code */
s++;
if (!(p = strchr( s, ']' ))) {
@@ -827,19 +829,20 @@ parse_response_code( imap_store_t *ctx, struct imap_cmd
*cmd, char *s )
return RESP_OK;
}
-static void
+static int
parse_list_rsp( imap_store_t *ctx, char *cmd )
{
char *arg;
list_t *list, *lp;
int l;
- list = parse_list( &cmd );
+ if (!(list = parse_list( &cmd )))
+ return -1;
if (list->val == LIST)
for (lp = list->child; lp; lp = lp->next)
if (is_atom( lp ) && !strcasecmp( lp->val, "\\NoSelect"
)) {
free_list( list );
- return;
+ return 0;
}
free_list( list );
arg = next_arg( &cmd );
@@ -849,21 +852,22 @@ parse_list_rsp( imap_store_t *ctx, char *cmd )
if (memcmp( arg, "INBOX", 5 ) || (arg[5] && arg[5] != ctx->delimiter)) {
l = strlen( ctx->gen.conf->path );
if (memcmp( arg, ctx->gen.conf->path, l ))
- return;
+ return 0;
arg += l;
if (!memcmp( arg, "INBOX", 5 ) && (!arg[5] || arg[5] ==
ctx->delimiter)) {
if (!arg[5])
warn( "IMAP warning: ignoring INBOX in %s\n",
ctx->gen.conf->path );
- return;
+ return 0;
}
}
if (!memcmp( arg + strlen( arg ) - 5, ".lock", 5 )) /* workaround
broken servers */
- return;
+ return 0;
if (map_name( arg, ctx->delimiter, '/') < 0) {
warn( "IMAP warning: ignoring mailbox %s (reserved character
'/' in name)\n", arg );
- return;
+ return 0;
}
add_string_list( &ctx->gen.boxes, arg );
+ return 0;
}
static int
@@ -925,6 +929,10 @@ imap_socket_read( void *aux )
return;
arg = next_arg( &cmd );
+ if (!arg) {
+ error( "IMAP error: empty response\n" );
+ break;
+ }
if (*arg == '*') {
arg = next_arg( &cmd );
if (!arg) {
@@ -933,9 +941,12 @@ imap_socket_read( void *aux )
}
if (!strcmp( "NAMESPACE", arg )) {
- ctx->ns_personal = parse_list( &cmd );
- ctx->ns_other = parse_list( &cmd );
- ctx->ns_shared = parse_list( &cmd );
+ if (!(ctx->ns_personal = parse_list( &cmd )) ||
+ !(ctx->ns_other = parse_list( &cmd )) ||
+ !(ctx->ns_shared = parse_list( &cmd ))) {
+ error( "IMAP error: malformed NAMESPACE
response\n" );
+ break;
+ }
} else if (ctx->greeting == GreetingPending && !strcmp(
"PREAUTH", arg )) {
ctx->greeting = GreetingPreauth;
parse_response_code( ctx, 0, cmd );
@@ -945,11 +956,14 @@ imap_socket_read( void *aux )
} else if (!strcmp( "BAD", arg ) || !strcmp( "NO", arg
) || !strcmp( "BYE", arg )) {
ctx->greeting = GreetingBad;
parse_response_code( ctx, 0, cmd );
- } else if (!strcmp( "CAPABILITY", arg ))
+ } else if (!strcmp( "CAPABILITY", arg )) {
parse_capability( ctx, cmd );
- else if (!strcmp( "LIST", arg ))
- parse_list_rsp( ctx, cmd );
- else if ((arg1 = next_arg( &cmd ))) {
+ } else if (!strcmp( "LIST", arg )) {
+ if (parse_list_rsp( ctx, cmd ) < 0) {
+ error( "IMAP error: malformed LIST
response\n" );
+ break;
+ }
+ } else if ((arg1 = next_arg( &cmd ))) {
if (!strcmp( "EXISTS", arg1 ))
ctx->gen.count = atoi( arg );
else if (!strcmp( "RECENT", arg1 ))
@@ -1010,6 +1024,10 @@ imap_socket_read( void *aux )
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. */
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