/*
- * $Id: rfc1738.c,v 1.22 2001/01/12 00:37:13 wessels Exp $
- *
- * DEBUG:
- * AUTHOR: Harvest Derived
- *
- * SQUID Web Proxy Cache http://www.squid-cache.org/
- * ----------------------------------------------------------
- *
- * Squid is the result of efforts by numerous individuals from
- * the Internet community; see the CONTRIBUTORS file for full
- * details. Many organizations have provided support for Squid's
- * development; see the SPONSORS file for full details. Squid is
- * Copyrighted (C) 2001 by the Regents of the University of
- * California; see the COPYRIGHT file for full details. Squid
- * incorporates software developed and/or copyrighted by other
- * sources; see the CREDITS file for full details.
- *
- * 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, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
+ * Copyright (C) 1996-2015 The Squid Software Foundation and contributors
*
+ * Squid software is distributed under GPLv2+ license and includes
+ * contributions from numerous individuals and organizations.
+ * Please see the COPYING and CONTRIBUTORS files for details.
*/
-#include "config.h"
+#include "squid.h"
+#include "rfc1738.h"
-#if HAVE_STDIO_H
-#include <stdio.h>
-#endif
#if HAVE_STRING_H
#include <string.h>
#endif
-#include "util.h"
-#include "snprintf.h"
-
-/*
+/*
* RFC 1738 defines that these characters should be escaped, as well
* any non-US-ASCII character or anything between 0x00 - 0x1F.
*/
-static char rfc1738_unsafe_chars[] =
-{
- (char) 0x3C, /* < */
- (char) 0x3E, /* > */
- (char) 0x22, /* " */
- (char) 0x23, /* # */
-#if 0 /* done in code */
- (char) 0x25, /* % */
+static char rfc1738_unsafe_chars[] = {
+ (char) 0x3C, /* < */
+ (char) 0x3E, /* > */
+ (char) 0x22, /* " */
+ (char) 0x23, /* # */
+#if 0 /* done in code */
+ (char) 0x20, /* space */
+ (char) 0x25, /* % */
#endif
- (char) 0x7B, /* { */
- (char) 0x7D, /* } */
- (char) 0x7C, /* | */
- (char) 0x5C, /* \ */
- (char) 0x5E, /* ^ */
- (char) 0x7E, /* ~ */
- (char) 0x5B, /* [ */
- (char) 0x5D, /* ] */
- (char) 0x60, /* ` */
- (char) 0x27, /* ' */
- (char) 0x20 /* space */
+ (char) 0x7B, /* { */
+ (char) 0x7D, /* } */
+ (char) 0x7C, /* | */
+ (char) 0x5C, /* \ */
+ (char) 0x5E, /* ^ */
+ (char) 0x7E, /* ~ */
+ (char) 0x5B, /* [ */
+ (char) 0x5D, /* ] */
+ (char) 0x60, /* ` */
+ (char) 0x27 /* ' */
};
-static char rfc1738_reserved_chars[] =
-{
- (char) 0x3b, /* ; */
- (char) 0x2f, /* / */
- (char) 0x3f, /* ? */
- (char) 0x3a, /* : */
- (char) 0x40, /* @ */
- (char) 0x3d, /* = */
- (char) 0x26 /* & */
+static char rfc1738_reserved_chars[] = {
+ (char) 0x3b, /* ; */
+ (char) 0x2f, /* / */
+ (char) 0x3f, /* ? */
+ (char) 0x3a, /* : */
+ (char) 0x40, /* @ */
+ (char) 0x3d, /* = */
+ (char) 0x26 /* & */
};
/*
- * rfc1738_escape - Returns a static buffer contains the RFC 1738
+ * rfc1738_escape - Returns a static buffer contains the RFC 1738
* compliant, escaped version of the given url.
*/
-static char *
-rfc1738_do_escape(const char *url, int encode_reserved)
+char *
+rfc1738_do_escape(const char *url, int flags)
{
static char *buf;
static size_t bufsize = 0;
- const char *p;
- char *q;
- int i, do_escape;
+ const char *src;
+ char *dst;
+ unsigned int i, do_escape;
if (buf == NULL || strlen(url) * 3 > bufsize) {
- xfree(buf);
- bufsize = strlen(url) * 3 + 1;
- buf = xcalloc(bufsize, 1);
+ xfree(buf);
+ bufsize = strlen(url) * 3 + 1;
+ buf = (char*)xcalloc(bufsize, 1);
}
- for (p = url, q = buf; *p != '\0'; p++, q++) {
- do_escape = 0;
+ for (src = url, dst = buf; *src != '\0' && dst < (buf + bufsize - 1); src++, dst++) {
- /* RFC 1738 defines these chars as unsafe */
- for (i = 0; i < sizeof(rfc1738_unsafe_chars); i++) {
- if (*p == rfc1738_unsafe_chars[i]) {
- do_escape = 1;
- break;
- }
- }
- /* Handle % separately */
- if (encode_reserved >= 0 && *p == '%')
- do_escape = 1;
- /* RFC 1738 defines these chars as reserved */
- for (i = 0; i < sizeof(rfc1738_reserved_chars) && encode_reserved > 0; i++) {
- if (*p == rfc1738_reserved_chars[i]) {
- do_escape = 1;
- break;
- }
- }
- /* RFC 1738 says any control chars (0x00-0x1F) are encoded */
- if ((unsigned char) *p <= (unsigned char) 0x1F) {
- do_escape = 1;
- }
- /* RFC 1738 says 0x7f is encoded */
- if (*p == (char) 0x7F) {
- do_escape = 1;
- }
- /* RFC 1738 says any non-US-ASCII are encoded */
- if (((unsigned char) *p >= (unsigned char) 0x80) &&
- ((unsigned char) *p <= (unsigned char) 0xFF)) {
- do_escape = 1;
- }
- /* Do the triplet encoding, or just copy the char */
- /* note: we do not need snprintf here as q is appropriately
- * allocated - KA */
+ /* a-z, A-Z and 0-9 are SAFE. */
+ if ((*src >= 'a' && *src <= 'z') || (*src >= 'A' && *src <= 'Z') || (*src >= '0' && *src <= '9')) {
+ *dst = *src;
+ continue;
+ }
- if (do_escape == 1) {
- (void) sprintf(q, "%%%02x", (unsigned char) *p);
- q += sizeof(char) * 2;
- } else {
- *q = *p;
- }
+ do_escape = 0;
+
+ /* RFC 1738 defines these chars as unsafe */
+ if ((flags & RFC1738_ESCAPE_UNSAFE)) {
+ for (i = 0; i < sizeof(rfc1738_unsafe_chars); i++) {
+ if (*src == rfc1738_unsafe_chars[i]) {
+ do_escape = 1;
+ break;
+ }
+ }
+ /* Handle % separately */
+ if (!(flags & RFC1738_ESCAPE_NOPERCENT) && *src == '%')
+ do_escape = 1;
+ /* Handle space separately */
+ else if (!(flags & RFC1738_ESCAPE_NOSPACE) && *src <= ' ')
+ do_escape = 1;
+ }
+ /* RFC 1738 defines these chars as reserved */
+ if ((flags & RFC1738_ESCAPE_RESERVED) && do_escape == 0) {
+ for (i = 0; i < sizeof(rfc1738_reserved_chars); i++) {
+ if (*src == rfc1738_reserved_chars[i]) {
+ do_escape = 1;
+ break;
+ }
+ }
+ }
+ if ((flags & RFC1738_ESCAPE_CTRLS) && do_escape == 0) {
+ /* RFC 1738 says any control chars (0x00-0x1F) are encoded */
+ if ((unsigned char) *src <= (unsigned char) 0x1F)
+ do_escape = 1;
+ /* RFC 1738 says 0x7f is encoded */
+ else if (*src == (char) 0x7F)
+ do_escape = 1;
+ /* RFC 1738 says any non-US-ASCII are encoded */
+ else if (((unsigned char) *src >= (unsigned char) 0x80))
+ do_escape = 1;
+ }
+ /* Do the triplet encoding, or just copy the char */
+ if (do_escape == 1) {
+ (void) snprintf(dst, (bufsize-(dst-buf)), "%%%02X", (unsigned char) *src);
+ dst += sizeof(char) * 2;
+ } else {
+ *dst = *src;
+ }
}
- *q = '\0';
+ *dst = '\0';
return (buf);
}
/*
- * rfc1738_escape - Returns a static buffer that contains the RFC
- * 1738 compliant, escaped version of the given url.
+ * Converts a ascii hex code into a binary character.
*/
-char *
-rfc1738_escape(const char *url)
+static int
+fromhex(char ch)
{
- return rfc1738_do_escape(url, 0);
+ if (ch >= '0' && ch <= '9')
+ return ch - '0';
+ if (ch >= 'a' && ch <= 'f')
+ return ch - 'a' + 10;
+ if (ch >= 'A' && ch <= 'F')
+ return ch - 'A' + 10;
+ return -1;
}
/*
- * rfc1738_escape_unescaped - Returns a static buffer that contains
- * the RFC 1738 compliant, escaped version of the given url.
- */
-char *
-rfc1738_escape_unescaped(const char *url)
-{
- return rfc1738_do_escape(url, -1);
-}
-
-/*
- * rfc1738_escape_part - Returns a static buffer that contains the
- * RFC 1738 compliant, escaped version of the given url segment.
- */
-char *
-rfc1738_escape_part(const char *url)
-{
- return rfc1738_do_escape(url, 1);
-}
-
-/*
- * rfc1738_unescape() - Converts escaped characters (%xy numbers) in
+ * rfc1738_unescape() - Converts escaped characters (%xy numbers) in
* given the string. %% is a %. %ab is the 8-bit hexadecimal number "ab"
*/
void
rfc1738_unescape(char *s)
{
- char hexnum[3];
- int i, j; /* i is write, j is read */
- unsigned int x;
+ int i, j; /* i is write, j is read */
for (i = j = 0; s[j]; i++, j++) {
- s[i] = s[j];
- if (s[i] != '%')
- continue;
- if (s[j + 1] == '%') { /* %% case */
- j++;
- continue;
- }
- if (s[j + 1] && s[j + 2]) {
- hexnum[0] = s[j + 1];
- hexnum[1] = s[j + 2];
- hexnum[2] = '\0';
- if (1 == sscanf(hexnum, "%x", &x)) {
- s[i] = (char) (0x0ff & x);
- j += 2;
- }
- }
+ s[i] = s[j];
+ if (s[j] != '%') {
+ /* normal case, nothing more to do */
+ } else if (s[j + 1] == '%') { /* %% case */
+ j++; /* Skip % */
+ } else {
+ /* decode */
+ int v1, v2, x;
+ v1 = fromhex(s[j + 1]);
+ if (v1 < 0)
+ continue; /* non-hex or \0 */
+ v2 = fromhex(s[j + 2]);
+ if (v2 < 0)
+ continue; /* non-hex or \0 */
+ x = v1 << 4 | v2;
+ if (x > 0 && x <= 255) {
+ s[i] = x;
+ j += 2;
+ }
+ }
}
s[i] = '\0';
}
+
projects / thirdparty / squid.git / blobdiff