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authorJeffrey Stedfast <fejj@ximian.com>2001-03-05 08:37:44 +0800
committerJeffrey Stedfast <fejj@src.gnome.org>2001-03-05 08:37:44 +0800
commit559f8e82452dabe820792d915042c1f70358dbf8 (patch)
tree1435269fd2da66663444dbe519fa42009d38a338 /camel/camel-mime-utils.c
parentd842e1a20e3ab2fd38582d2ccc863e4bbcb87d0d (diff)
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encoded string segments need to be at least 8 chars (7 doesn't leave room
2001-03-04 Jeffrey Stedfast <fejj@ximian.com> * camel-mime-utils.c (rfc2047_decode_word): encoded string segments need to be at least 8 chars (7 doesn't leave room for an ecoding value. To be more realistic, even 8 chars isn't enough as this assumes there is no charset nor any encoded text. If the encoding value is not 'Q' or 'B', then return NULL. This fixes bug #1689. svn path=/trunk/; revision=8550
Diffstat (limited to 'camel/camel-mime-utils.c')
-rw-r--r--camel/camel-mime-utils.c38
1 files changed, 20 insertions, 18 deletions
diff --git a/camel/camel-mime-utils.c b/camel/camel-mime-utils.c
index ad2a200708..5e4fcdce3b 100644
--- a/camel/camel-mime-utils.c
+++ b/camel/camel-mime-utils.c
@@ -915,17 +915,15 @@ rfc2047_decode_word(const char *in, int len)
d(printf("rfc2047: decoding '%.*s'\n", len, in));
- /* just make sure we're not passed shit */
- if (len<7
- || !(in[0]=='=' && in[1]=='?' && in[len-1]=='=' && in[len-2]=='?')) {
+ /* quick check to see if this could possibly be a real encoded word */
+ if (len < 8 || !(in[0] == '=' && in[1] == '?' && in[len-1] == '=' && in[len-2] == '?')) {
d(printf("invalid\n"));
return NULL;
}
-
- inptr = memchr(inptr, '?', inend-inptr);
- if (inptr!=NULL
- && inptr<inend+2
- && inptr[2]=='?') {
+
+ /* skip past the charset to the encoding type */
+ inptr = memchr (inptr, '?', inend-inptr);
+ if (inptr != NULL && inptr < inend + 2 && inptr[2] == '?') {
d(printf("found ?, encoding is '%c'\n", inptr[0]));
inptr++;
tmplen = inend-inptr-2;
@@ -941,6 +939,9 @@ rfc2047_decode_word(const char *in, int len)
/* if state != 0 then error? */
break;
}
+ default:
+ /* uhhh, unknown encoding type - probably an invalid encoded word string */
+ return NULL;
}
d(printf("The encoded length = %d\n", inlen));
if (inlen>0) {
@@ -967,7 +968,8 @@ rfc2047_decode_word(const char *in, int len)
}
iconv_close(ic);
} else {
- w(g_warning("Cannot decode charset, header display may be corrupt: %s: %s", encname, strerror(errno)));
+ w(g_warning("Cannot decode charset, header display may be corrupt: %s: %s",
+ encname, strerror(errno)));
/* TODO: Should this do this, or just leave the encoded strings? */
decword[inlen] = 0;
decoded = g_strdup(decword);
@@ -1019,11 +1021,11 @@ static char *
header_decode_text (const char *in, int inlen)
{
GString *out;
- char *inptr, *inend, *start;
+ const char *inptr, *inend, *start;
char *decoded;
unsigned char lastc = 0;
int wasdword = FALSE;
-
+
out = g_string_new ("");
start = inptr = (char *) in;
inend = inptr + inlen;
@@ -1031,7 +1033,7 @@ header_decode_text (const char *in, int inlen)
while (inptr && inptr < inend) {
unsigned char c = *inptr++;
- if (is_lwsp(c)) {
+ if (is_lwsp (c)) {
char *word, *dword;
guint len;
@@ -1039,10 +1041,10 @@ header_decode_text (const char *in, int inlen)
word = start;
dword = rfc2047_decode_word (word, len);
-
+
if (dword) {
if (!wasdword && lastc)
- g_string_append_c(out, lastc);
+ g_string_append_c (out, lastc);
g_string_append (out, dword);
g_free (dword);
@@ -1050,12 +1052,12 @@ header_decode_text (const char *in, int inlen)
wasdword = TRUE;
} else {
if (lastc)
- g_string_append_c(out, lastc);
+ g_string_append_c (out, lastc);
out = append_latin1 (out, word, len);
lastc = c;
wasdword = FALSE;
}
-
+
start = inptr;
}
}
@@ -1071,12 +1073,12 @@ header_decode_text (const char *in, int inlen)
if (dword) {
if (!wasdword && lastc)
- g_string_append_c(out, lastc);
+ g_string_append_c (out, lastc);
g_string_append (out, dword);
g_free (dword);
} else {
if (lastc)
- g_string_append_c(out, lastc);
+ g_string_append_c (out, lastc);
out = g_string_append_len (out, word, len);
}
}