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Many cookie fixes:

Browse Source 
o Save domains in jars like Mozilla does. It means all domains set in
    Set-Cookie: headers are dot-prefixed.
  o Save and use the 'tailmatch' field in the Mozilla/Netscape cookie jars (the
    second column).
  o Reject cookies using illegal domains in the Set-Cookie: line. Concerns
    both domains with too few dots or domains that are outside the currently
    operating server host's domain.
  o Set the path part by default to the one used in the request, if none was
    set in the Set-Cookie line.
This commit is contained in:
Daniel Stenberg 2003-04-30 17:03:43 +00:00
parent 836aaa1647
commit efd836d971
2 changed files with 138 additions and 59 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

188
lib/cookie.c
View File

@ -111,6 +111,17 @@ free_cookiemess(struct Cookie *co)
free(co);
}
static bool tailmatch(const char *little, const char *bigone)
{
unsigned int littlelen = strlen(little);
unsigned int biglen = strlen(bigone);
if(littlelen > biglen)
return FALSE;
return strequal(little, bigone+biglen-littlelen);
}
/****************************************************************************
*
* Curl_cookie_add()
@ -123,7 +134,10 @@ struct Cookie *
Curl_cookie_add(struct CookieInfo *c,
bool httpheader, /* TRUE if HTTP header-style line */
char *lineptr, /* first character of the line */
char *domain) /* default domain */
char *domain, /* default domain */
char *path) /* full path used when this cookie is set,
used to get default path for the cookie
unless set */
{
struct Cookie *clist;
char what[MAX_COOKIE_LINE];
@ -134,6 +148,7 @@ Curl_cookie_add(struct CookieInfo *c,
struct Cookie *lastc=NULL;
time_t now = time(NULL);
bool replace_old = FALSE;
bool badcookie = FALSE; /* cookies are good by default. mmmmm yummy */
/* First, alloc and init a new struct for it */
co = (struct Cookie *)malloc(sizeof(struct Cookie));
@ -186,8 +201,58 @@ Curl_cookie_add(struct CookieInfo *c,
co->path=strdup(whatptr);
}
else if(strequal("domain", name)) {
co->domain=strdup(whatptr);
co->field1= (whatptr[0]=='.')?2:1;
/* note that this name may or may not have a preceeding dot, but
we don't care about that, we treat the names the same anyway */
char *ptr=whatptr;
int dotcount=1;
unsigned int i;
static const char *seventhree[]= {
"com", "edu", "net", "org", "gov", "mil", "int"
};
/* Count the dots, we need to make sure that there are THREE dots
in the normal domains, or TWO in the seventhree-domains. */
if('.' == whatptr[0])
/* don't count the initial dot, assume it */
ptr++;
do {
ptr = strchr(ptr, '.');
if(ptr) {
ptr++;
dotcount++;
}
} while(ptr);
for(i=0;
i<sizeof(seventhree)/sizeof(seventhree[0]); i++) {
if(tailmatch(seventhree[i], whatptr)) {
dotcount++; /* we allow one dot less for these */
break;
}
}
if(dotcount < 3)
/* Received and skipped a cookie with a domain using too few
dots. */
badcookie=TRUE; /* mark this as a bad cookie */
else {
/* Now, we make sure that our host is within the given domain,
or the given domain is not valid and thus cannot be set. */
if(!domain || tailmatch(whatptr, domain)) {
co->domain=strdup(whatptr);
co->tailmatch=TRUE; /* we always do that if the domain name was
given */
}
else
/* we did not get a tailmatch and then the attempted set domain
is not a domain to which the current host belongs. Mark as
bad. */
badcookie=TRUE;
}
}
else if(strequal("version", name)) {
co->version=strdup(whatptr);
@ -249,8 +314,11 @@ Curl_cookie_add(struct CookieInfo *c,
semiptr=strchr(ptr, '\0');
} while(semiptr);
if(NULL == co->name) {
/* we didn't get a cookie name, this is an illegal line, bail out */
if(badcookie || (NULL == co->name)) {
/* we didn't get a cookie name or a bad one,
this is an illegal line, bail out */
if(co->expirestr)
free(co->expirestr);
if(co->domain)
free(co->domain);
if(co->path)
@ -264,8 +332,20 @@ Curl_cookie_add(struct CookieInfo *c,
}
if(NULL == co->domain)
/* no domain given in the header line, set the default now */
/* no domain was given in the header line, set the default now */
co->domain=domain?strdup(domain):NULL;
if((NULL == co->path) && path) {
/* no path was given in the header line, set the default now */
char *endslash = strrchr(path, '/');
if(endslash) {
int pathlen = endslash-path+1; /* include the ending slash */
co->path=malloc(pathlen+1); /* one extra for the zero byte */
if(co->path) {
memcpy(co->path, path, pathlen);
co->path[pathlen]=0; /* zero terminate */
}
}
}
}
else {
/* This line is NOT a HTTP header style line, we do offer support for
@ -297,7 +377,8 @@ Curl_cookie_add(struct CookieInfo *c,
/* Now loop through the fields and init the struct we already have
allocated */
for(ptr=firstptr, fields=0; ptr; ptr=strtok_r(NULL, "\t", &tok_buf), fields++) {
for(ptr=firstptr, fields=0; ptr;
ptr=strtok_r(NULL, "\t", &tok_buf), fields++) {
switch(fields) {
case 0:
co->domain = strdup(ptr);
@ -312,10 +393,8 @@ Curl_cookie_add(struct CookieInfo *c,
As far as I can see, it is set to true when the cookie says
.domain.com and to false when the domain is complete www.domain.com
We don't currently take advantage of this knowledge.
*/
co->field1=strequal(ptr, "TRUE")+1; /* store information */
co->tailmatch=strequal(ptr, "TRUE"); /* store information */
break;
case 2:
/* It turns out, that sometimes the file format allows the path
@ -375,10 +454,11 @@ Curl_cookie_add(struct CookieInfo *c,
if(clist->domain && co->domain) {
if(strequal(clist->domain, co->domain) ||
(clist->domain[0]=='.' &&
strequal(&(clist->domain[1]), co->domain)) ||
(co->domain[0]=='.' &&
strequal(clist->domain, &(co->domain[1]))) )
(co->tailmatch && /* only do the dot magic if tailmatching is OK */
((clist->domain[0]=='.' &&
strequal(&(clist->domain[1]), co->domain)) ||
(co->domain[0]=='.' &&
strequal(clist->domain, &(co->domain[1]))))) )
/* The domains are identical, or at least identical if you skip the
preceeding dot */
replace_old=TRUE;
@ -532,7 +612,7 @@ struct CookieInfo *Curl_cookie_init(char *file,
while(*lineptr && isspace((int)*lineptr))
lineptr++;
Curl_cookie_add(c, headerline, lineptr, NULL);
Curl_cookie_add(c, headerline, lineptr, NULL, NULL);
}
if(fromfile)
fclose(fp);
@ -561,9 +641,6 @@ struct Cookie *Curl_cookie_getlist(struct CookieInfo *c,
struct Cookie *newco;
struct Cookie *co;
time_t now = time(NULL);
int hostlen=strlen(host);
int domlen;
struct Cookie *mainco=NULL;
if(!c || !c->cookies)
@ -572,43 +649,42 @@ struct Cookie *Curl_cookie_getlist(struct CookieInfo *c,
co = c->cookies;
while(co) {
/* only process this cookie if it is not expired or had no expire
date AND that if the cookie requires we're secure we must only
continue if we are! */
/* only process this cookie if it is not expired or had no expire
date AND that if the cookie requires we're secure we must only
continue if we are! */
if( (co->expires<=0 || (co->expires> now)) &&
(co->secure?secure:TRUE) ) {
/* now check if the domain is correct */
if(!co->domain ||
(co->tailmatch && tailmatch(co->domain, host)) ||
(!co->tailmatch && strequal(host, co->domain)) ) {
/* the right part of the host matches the domain stuff in the
cookie data */
/* now check the left part of the path with the cookies path
requirement */
if(!co->path ||
checkprefix(co->path, path) ) {
/* now check if the domain is correct */
domlen=co->domain?strlen(co->domain):0;
if(!co->domain ||
((domlen<=hostlen) &&
strequal(host+(hostlen-domlen), co->domain)) ) {
/* the right part of the host matches the domain stuff in the
cookie data */
/* and now, we know this is a match and we should create an
entry for the return-linked-list */
newco = (struct Cookie *)malloc(sizeof(struct Cookie));
if(newco) {
/* first, copy the whole source cookie: */
memcpy(newco, co, sizeof(struct Cookie));
/* now check the left part of the path with the cookies path
requirement */
if(!co->path ||
checkprefix(co->path, path) ) {
/* and now, we know this is a match and we should create an
entry for the return-linked-list */
newco = (struct Cookie *)malloc(sizeof(struct Cookie));
if(newco) {
/* first, copy the whole source cookie: */
memcpy(newco, co, sizeof(struct Cookie));
/* then modify our next */
newco->next = mainco;
/* point the main to us */
mainco = newco;
}
}
}
}
co = co->next;
/* then modify our next */
newco->next = mainco;
/* point the main to us */
mainco = newco;
}
}
}
}
co = co->next;
}
return mainco; /* return the new list */
@ -716,15 +792,19 @@ int Curl_cookie_output(struct CookieInfo *c, char *dumphere)
while(co) {
fprintf(out,
"%s\t" /* domain */
"%s\t" /* field1 */
"%s%s\t" /* domain */
"%s\t" /* tailmatch */
"%s\t" /* path */
"%s\t" /* secure */
"%u\t" /* expires */
"%s\t" /* name */
"%s\n", /* value */
/* Make sure all domains are prefixed with a dot if they allow
tailmatching. This is Mozilla-style. */
(co->tailmatch && co->domain && co->domain[0] != '.')? ".":"",
co->domain?co->domain:"unknown",
co->field1==2?"TRUE":"FALSE",
co->tailmatch?"TRUE":"FALSE",
co->path?co->path:"/",
co->secure?"TRUE":"FALSE",
(unsigned int)co->expires,

9
lib/cookie.h
View File

@ -40,8 +40,7 @@ struct Cookie {
char *domain; /* domain = <this> */
long expires; /* expires = <this> */
char *expirestr; /* the plain text version */
char field1; /* read from a cookie file, 1 => FALSE, 2=> TRUE */
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> */
@ -70,11 +69,11 @@ struct CookieInfo {
#define MAX_NAME_TXT "255"
/*
* Add a cookie to the internal list of cookies. The domain argument is only
* used if the header boolean is TRUE.
* 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 CookieInfo *, bool header, char *line,
char *domain);
char *domain, char *path);
struct CookieInfo *Curl_cookie_init(char *, struct CookieInfo *, bool);
struct Cookie *Curl_cookie_getlist(struct CookieInfo *, char *, char *, bool);