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Be more strict about invalid UTF-8.

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This commit is contained in:
nicm 2015-11-14 10:56:31 +00:00
parent c56b81a2ce
commit 64333e3ef8
6 changed files with 76 additions and 54 deletions
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13
input.c
View File

@ -446,11 +446,11 @@ const struct input_transition input_state_ground_table[] = {
{ 0x1c, 0x1f, input_c0_dispatch, NULL },
{ 0x20, 0x7e, input_print, NULL },
{ 0x7f, 0x7f, NULL, NULL },
{ 0x80, 0xc1, input_print, NULL },
{ 0x80, 0xc1, NULL, NULL },
{ 0xc2, 0xdf, input_utf8_open, &input_state_utf8_one },
{ 0xe0, 0xef, input_utf8_open, &input_state_utf8_two },
{ 0xf0, 0xf4, input_utf8_open, &input_state_utf8_three },
{ 0xf5, 0xff, input_print, NULL },
{ 0xf5, 0xff, NULL, NULL },
{ -1, -1, NULL, NULL }
};
@ -1923,7 +1923,8 @@ input_utf8_open(struct input_ctx *ictx)
{
struct utf8_data *ud = &ictx->utf8data;
utf8_open(ud, ictx->ch);
if (!utf8_open(ud, ictx->ch))
log_fatalx("UTF-8 open invalid %#hhx", ictx->ch);
log_debug("%s %hhu", __func__, ud->size);
@ -1936,7 +1937,8 @@ input_utf8_add(struct input_ctx *ictx)
{
struct utf8_data *ud = &ictx->utf8data;
utf8_append(ud, ictx->ch);
if (utf8_append(ud, ictx->ch) != 1)
log_fatalx("UTF-8 add invalid %#hhx", ictx->ch);
log_debug("%s", __func__);
@ -1949,7 +1951,8 @@ input_utf8_close(struct input_ctx *ictx)
{
struct utf8_data *ud = &ictx->utf8data;
utf8_append(ud, ictx->ch);
if (utf8_append(ud, ictx->ch) != 0)
log_fatalx("UTF-8 close invalid %#hhx", ictx->ch);
log_debug("%s %hhu '%*s' (width %hhu)", __func__, ud->size,
(int)ud->size, ud->data, ud->width);

6
key-string.c
View File

@ -144,7 +144,7 @@ key_string_lookup_string(const char *string)
static const char *other = "!#()+,-.0123456789:;<=>?'\r\t";
key_code key;
u_short u;
int size;
int size, more;
key_code modifiers;
struct utf8_data ud;
u_int i;
@ -177,7 +177,9 @@ key_string_lookup_string(const char *string)
if (strlen(string) != ud.size)
return (KEYC_NONE);
for (i = 1; i < ud.size; i++)
utf8_append(&ud, (u_char)string[i]);
more = utf8_append(&ud, (u_char)string[i]);
if (more != 0)
return (KEYC_NONE);
key = utf8_combine(&ud);
return (key | modifiers);
}

14
screen-write.c
View File

@ -115,6 +115,7 @@ screen_write_strlen(const char *fmt, ...)
struct utf8_data ud;
u_char *ptr;
size_t left, size = 0;
int more;
va_start(ap, fmt);
xvasprintf(&msg, fmt, ap);
@ -128,10 +129,11 @@ screen_write_strlen(const char *fmt, ...)
left = strlen(ptr);
if (left < (size_t)ud.size - 1)
break;
while (utf8_append(&ud, *ptr))
while ((more = utf8_append(&ud, *ptr)) == 1)
ptr++;
ptr++;
if (more == 0)
size += ud.width;
} else {
if (*ptr > 0x1f && *ptr < 0x7f)
@ -176,6 +178,7 @@ screen_write_vnputs(struct screen_write_ctx *ctx, ssize_t maxlen,
struct utf8_data ud;
u_char *ptr;
size_t left, size = 0;
int more;
xvasprintf(&msg, fmt, ap);
@ -187,10 +190,11 @@ screen_write_vnputs(struct screen_write_ctx *ctx, ssize_t maxlen,
left = strlen(ptr);
if (left < (size_t)ud.size - 1)
break;
while (utf8_append(&ud, *ptr))
while ((more = utf8_append(&ud, *ptr)) == 1)
ptr++;
ptr++;
if (more == 0) {
if (maxlen > 0 &&
size + ud.width > (size_t) maxlen) {
while (size < (size_t) maxlen) {
@ -203,6 +207,7 @@ screen_write_vnputs(struct screen_write_ctx *ctx, ssize_t maxlen,
utf8_copy(&gc->data, &ud);
screen_write_cell(ctx, gc);
}
} else {
if (maxlen > 0 && size + 1 > (size_t) maxlen)
break;
@ -231,6 +236,7 @@ screen_write_cnputs(struct screen_write_ctx *ctx, ssize_t maxlen,
char *msg;
u_char *ptr, *last;
size_t left, size = 0;
int more;
va_start(ap, fmt);
xvasprintf(&msg, fmt, ap);
@ -260,10 +266,11 @@ screen_write_cnputs(struct screen_write_ctx *ctx, ssize_t maxlen,
left = strlen(ptr);
if (left < (size_t)ud.size - 1)
break;
while (utf8_append(&ud, *ptr))
while ((more = utf8_append(&ud, *ptr)) == 1)
ptr++;
ptr++;
if (more == 0) {
if (maxlen > 0 &&
size + ud.width > (size_t) maxlen) {
while (size < (size_t) maxlen) {
@ -276,6 +283,7 @@ screen_write_cnputs(struct screen_write_ctx *ctx, ssize_t maxlen,
utf8_copy(&lgc.data, &ud);
screen_write_cell(ctx, &lgc);
}
} else {
if (maxlen > 0 && size + 1 > (size_t) maxlen)
break;

2
tmux.h
View File

@ -624,7 +624,7 @@ struct utf8_data {
u_char have;
u_char size;
u_char width;
u_char width; /* 0xff if invalid */
} __packed;
/* Grid attributes. */

11
tty-keys.c
View File

@ -472,7 +472,7 @@ tty_keys_next(struct tty *tty)
const char *buf;
size_t len, size;
cc_t bspace;
int delay, expired = 0;
int delay, expired = 0, more;
key_code key;
struct utf8_data ud;
u_int i;
@ -547,7 +547,9 @@ first_key:
goto partial_key;
}
for (i = 1; i < size; i++)
utf8_append(&ud, (u_char)buf[i]);
more = utf8_append(&ud, (u_char)buf[i]);
if (more != 0)
goto discard_key;
key = utf8_combine(&ud);
log_debug("UTF-8 key %.*s %#llx", (int)size, buf, key);
goto complete_key;
@ -653,6 +655,7 @@ tty_keys_mouse(struct tty *tty, const char *buf, size_t len, size_t *size)
struct utf8_data ud;
u_int i, value, x, y, b, sgr_b;
u_char sgr_type, c;
int more;
/*
* Standard mouse sequences are \033[M followed by three characters
@ -699,7 +702,9 @@ tty_keys_mouse(struct tty *tty, const char *buf, size_t len, size_t *size)
(*size)++;
if (len <= *size)
return (1);
utf8_append(&ud, buf[*size]);
more = utf8_append(&ud, buf[*size]);
if (more != 0)
return (-1);
value = utf8_combine(&ud);
} else
value = (u_char)buf[*size];

38
utf8.c
View File

@ -403,22 +403,26 @@ utf8_open(struct utf8_data *ud, u_char ch)
/*
* Append character to UTF-8, closing if finished.
*
* Returns 1 if more UTF-8 data to come, 0 if finished.
* Returns 1 if more UTF-8 data to come, 0 if finished and valid, -1 if
* finished and invalid.
*/
int
utf8_append(struct utf8_data *ud, u_char ch)
{
/* XXX this should do validity checks too! */
if (ud->have >= ud->size)
fatalx("UTF-8 character overflow");
if (ud->size > sizeof ud->data)
fatalx("UTF-8 character size too large");
if (ud->have != 0 && (ch & 0xc0) != 0x80)
ud->width = 0xff;
ud->data[ud->have++] = ch;
if (ud->have != ud->size)
return (1);
if (ud->width == 0xff)
return (-1);
ud->width = utf8_width(utf8_combine(ud));
return (0);
}
@ -556,15 +560,15 @@ utf8_strvis(char *dst, const char *src, size_t len, int flag)
while (src < end) {
if (utf8_open(&ud, *src)) {
more = 1;
while (++src < end && more)
while (++src < end && more == 1)
more = utf8_append(&ud, *src);
if (!more) {
if (more == 0) {
/* UTF-8 character finished. */
for (i = 0; i < ud.size; i++)
*dst++ = ud.data[i];
continue;
} else if (ud.have > 0) {
/* Not a complete UTF-8 character. */
/* Not a complete, valid UTF-8 character. */
src -= ud.have;
}
}
@ -600,9 +604,9 @@ utf8_sanitize(const char *src)
dst = xreallocarray(dst, n + 1, sizeof *dst);
if (utf8_open(&ud, *src)) {
more = 1;
while (*++src != '\0' && more)
while (*++src != '\0' && more == 1)
more = utf8_append(&ud, *src);
if (!more) {
if (more != 1) {
dst = xreallocarray(dst, n + ud.width,
sizeof *dst);
for (i = 0; i < ud.width; i++)
@ -612,10 +616,8 @@ utf8_sanitize(const char *src)
src -= ud.have;
}
if (*src > 0x1f && *src < 0x7f)
dst[n] = *src;
dst[n++] = *src;
src++;
n++;
}
dst = xreallocarray(dst, n + 1, sizeof *dst);
@ -641,19 +643,20 @@ utf8_fromcstr(const char *src)
dst = xreallocarray(dst, n + 1, sizeof *dst);
if (utf8_open(&dst[n], *src)) {
more = 1;
while (*++src != '\0' && more)
while (*++src != '\0' && more == 1)
more = utf8_append(&dst[n], *src);
if (!more) {
if (more != 1) {
n++;
continue;
}
src -= dst[n].have;
}
if (*src > 0x1f && *src < 0x7f) {
utf8_set(&dst[n], *src);
src++;
n++;
}
src++;
}
dst = xreallocarray(dst, n + 1, sizeof *dst);
dst[n].size = 0;
@ -693,14 +696,15 @@ utf8_cstrwidth(const char *s)
while (*s != '\0') {
if (utf8_open(&tmp, *s)) {
more = 1;
while (*++s != '\0' && more)
while (*++s != '\0' && more == 1)
more = utf8_append(&tmp, *s);
if (!more) {
if (more != 1) {
width += tmp.width;
continue;
}
s -= tmp.have;
}
if (*s > 0x1f && *s < 0x7f)
width++;
s++;
}