Sha256: 4edd81d4461e6006281fe836a5e4c06006abc23e9dd35502706878e631b42850
Contents?: true
Size: 1.99 KB
Versions: 18
Compression:
Stored size: 1.99 KB
Contents
#include <assert.h>
#include <stdio.h>
#include <string.h>
#include "houdini.h"
#define ESCAPE_GROW_FACTOR(x) (((x) * 12) / 10) /* this is very scientific, yes */
/**
* According to the OWASP rules:
*
* & --> &
* < --> <
* > --> >
* " --> "
* ' --> ' ' is not recommended
* / --> / forward slash is included as it helps end an HTML entity
*
*/
static const char HTML_ESCAPE_TABLE[] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 1, 0, 0, 0, 2, 3, 0, 0, 0, 0, 0, 0, 0, 4,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, 0, 6, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
};
static const char *HTML_ESCAPES[] = {
"",
""",
"&",
"'",
"/",
"<",
">"
};
void
houdini_escape_html0(struct buf *ob, const uint8_t *src, size_t size, int secure)
{
size_t i = 0, org, esc = 0;
bufgrow(ob, ESCAPE_GROW_FACTOR(size));
while (i < size) {
org = i;
while (i < size && (esc = HTML_ESCAPE_TABLE[src[i]]) == 0)
i++;
if (i > org)
bufput(ob, src + org, i - org);
/* escaping */
if (i >= size)
break;
/* The forward slash is only escaped in secure mode */
if (src[i] == '/' && !secure)
bufputc(ob, '/');
else
bufputs(ob, HTML_ESCAPES[esc]);
i++;
}
}
void
houdini_escape_html(struct buf *ob, const uint8_t *src, size_t size)
{
houdini_escape_html0(ob, src, size, 1);
}
Version data entries
18 entries across 18 versions & 2 rubygems