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curl/lib/cookie.h
Daniel Stenberg 2bc230de63
cookies: reject oversized cookies
... instead of truncating them.

There's no fixed limit for acceptable cookie names in RFC 6265, but the
entire cookie is said to be less than 4096 bytes (section 6.1). This is
also what browsers seem to implement.

We now allow max 5000 bytes cookie header. Max 4095 bytes length per
cookie name and value. Name + value together may not exceed 4096 bytes.

Added test 1151 to verify

Bug: https://curl.haxx.se/mail/lib-2017-09/0062.html
Reported-by: Kevin Smith

Closes #1894
2017-09-18 22:55:50 +02:00

108 lines
4.1 KiB
C

#ifndef HEADER_CURL_COOKIE_H
#define HEADER_CURL_COOKIE_H
/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
***************************************************************************/
#include "curl_setup.h"
#include <curl/curl.h>
struct Cookie {
struct Cookie *next; /* next in the chain */
char *name; /* <this> = value */
char *value; /* name = <this> */
char *path; /* path = <this> which is in Set-Cookie: */
char *spath; /* sanitized cookie path */
char *domain; /* domain = <this> */
curl_off_t expires; /* expires = <this> */
char *expirestr; /* the plain text version */
bool tailmatch; /* weather we do tail-matchning of the domain name */
/* RFC 2109 keywords. Version=1 means 2109-compliant cookie sending */
char *version; /* Version = <value> */
char *maxage; /* Max-Age = <value> */
bool secure; /* whether the 'secure' keyword was used */
bool livecookie; /* updated from a server, not a stored file */
bool httponly; /* true if the httponly directive is present */
};
struct CookieInfo {
/* linked list of cookies we know of */
struct Cookie *cookies;
char *filename; /* file we read from/write to */
bool running; /* state info, for cookie adding information */
long numcookies; /* number of cookies in the "jar" */
bool newsession; /* new session, discard session cookies on load */
};
/* This is the maximum line length we accept for a cookie line. RFC 2109
section 6.3 says:
"at least 4096 bytes per cookie (as measured by the size of the characters
that comprise the cookie non-terminal in the syntax description of the
Set-Cookie header)"
We allow max 5000 bytes cookie header. Max 4095 bytes length per cookie
name and value. Name + value may not exceed 4096 bytes.
*/
#define MAX_COOKIE_LINE 5000
#define MAX_COOKIE_LINE_TXT "4999"
/* This is the maximum length of a cookie name or content we deal with: */
#define MAX_NAME 4096
#define MAX_NAME_TXT "4095"
struct Curl_easy;
/*
* Add a cookie to the internal list of cookies. The domain and path arguments
* are only used if the header boolean is TRUE.
*/
struct Cookie *Curl_cookie_add(struct Curl_easy *data,
struct CookieInfo *, bool header, char *lineptr,
const char *domain, const char *path);
struct Cookie *Curl_cookie_getlist(struct CookieInfo *, const char *,
const char *, bool);
void Curl_cookie_freelist(struct Cookie *cookies);
void Curl_cookie_clearall(struct CookieInfo *cookies);
void Curl_cookie_clearsess(struct CookieInfo *cookies);
#if defined(CURL_DISABLE_HTTP) || defined(CURL_DISABLE_COOKIES)
#define Curl_cookie_list(x) NULL
#define Curl_cookie_loadfiles(x) Curl_nop_stmt
#define Curl_cookie_init(x,y,z,w) NULL
#define Curl_cookie_cleanup(x) Curl_nop_stmt
#define Curl_flush_cookies(x,y) Curl_nop_stmt
#else
void Curl_flush_cookies(struct Curl_easy *data, int cleanup);
void Curl_cookie_cleanup(struct CookieInfo *);
struct CookieInfo *Curl_cookie_init(struct Curl_easy *data,
const char *, struct CookieInfo *, bool);
struct curl_slist *Curl_cookie_list(struct Curl_easy *data);
void Curl_cookie_loadfiles(struct Curl_easy *data);
#endif
#endif /* HEADER_CURL_COOKIE_H */