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/* $OpenBSD: cookie.c,v 1.10 2021/02/16 16:27:34 naddy Exp $ */
/*
* Copyright (c) 2007 Pierre-Yves Ritschard <pyr@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef NOSSL
#include <sys/types.h>
#include <sys/queue.h>
#include <err.h>
#include <errno.h>
#include <fnmatch.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <time.h>
#include "ftp_var.h"
struct cookie {
TAILQ_ENTRY(cookie) entry;
TAILQ_ENTRY(cookie) tempentry;
u_int8_t flags;
#define F_SECURE 0x01
#define F_TAILMATCH 0x02
#define F_NOEXPIRY 0x04
#define F_MATCHPATH 0x08
time_t expires;
char *domain;
char *path;
char *key;
char *val;
};
TAILQ_HEAD(cookiejar, cookie);
typedef enum {
DOMAIN = 0, TAILMATCH = 1, PATH = 2, SECURE = 3,
EXPIRES = 4, NAME = 5, VALUE = 6, DONE = 7
} field_t;
static struct cookiejar jar;
void
cookie_load(void)
{
field_t field;
time_t date;
char *line;
char *lbuf = NULL;
size_t lbufsize = 0;
char *param;
const char *estr;
FILE *fp;
struct cookie *ck;
if (cookiefile == NULL)
return;
TAILQ_INIT(&jar);
fp = fopen(cookiefile, "r");
if (fp == NULL)
err(1, "cannot open cookie file %s", cookiefile);
date = time(NULL);
while (getline(&lbuf, &lbufsize, fp) != -1) {
line = lbuf;
line[strcspn(line, "\r\n")] = '\0';
line += strspn(line, " \t");
if ((*line == '#') || (*line == '\0')) {
continue;
}
field = DOMAIN;
ck = calloc(1, sizeof(*ck));
if (ck == NULL)
err(1, NULL);
while ((param = strsep(&line, "\t")) != NULL) {
switch (field) {
case DOMAIN:
if (*param == '.') {
if (asprintf(&ck->domain,
"*%s", param) == -1)
err(1, NULL);
} else {
ck->domain = strdup(param);
if (ck->domain == NULL)
err(1, NULL);
}
break;
case TAILMATCH:
if (strcasecmp(param, "TRUE") == 0) {
ck->flags |= F_TAILMATCH;
} else if (strcasecmp(param, "FALSE") != 0) {
errx(1, "invalid cookie file");
}
break;
case PATH:
if (strcmp(param, "/") != 0) {
ck->flags |= F_MATCHPATH;
if (asprintf(&ck->path,
"%s*", param) == -1)
err(1, NULL);
}
break;
case SECURE:
if (strcasecmp(param, "TRUE") == 0) {
ck->flags |= F_SECURE;
} else if (strcasecmp(param, "FALSE") != 0) {
errx(1, "invalid cookie file");
}
break;
case EXPIRES:
/*
* rely on sizeof(time_t) being 4
*/
ck->expires = strtonum(param, 0,
INT_MAX, &estr);
if (estr) {
if (errno == ERANGE)
ck->flags |= F_NOEXPIRY;
else
errx(1, "invalid cookie file");
}
break;
case NAME:
ck->key = strdup(param);
if (ck->key == NULL)
err(1, NULL);
break;
case VALUE:
ck->val = strdup(param);
if (ck->val == NULL)
err(1, NULL);
break;
case DONE:
errx(1, "invalid cookie file");
break;
}
field++;
}
if (field != DONE)
errx(1, "invalid cookie file");
if (ck->expires < date && !(ck->flags & F_NOEXPIRY)) {
free(ck->val);
free(ck->key);
free(ck->path);
free(ck->domain);
free(ck);
} else
TAILQ_INSERT_TAIL(&jar, ck, entry);
}
free(lbuf);
fclose(fp);
}
void
cookie_get(const char *domain, const char *path, int secure, char **pstr)
{
size_t len;
size_t headlen;
char *head;
char *str;
struct cookie *ck;
struct cookiejar tempjar;
*pstr = NULL;
if (cookiefile == NULL)
return;
TAILQ_INIT(&tempjar);
len = strlen("Cookie\r\n");
TAILQ_FOREACH(ck, &jar, entry) {
if (fnmatch(ck->domain, domain, 0) == 0 &&
(secure || !(ck->flags & F_SECURE))) {
if (ck->flags & F_MATCHPATH &&
fnmatch(ck->path, path, 0) != 0)
continue;
len += strlen(ck->key) + strlen(ck->val) +
strlen("; =");
TAILQ_INSERT_TAIL(&tempjar, ck, tempentry);
}
}
if (TAILQ_EMPTY(&tempjar))
return;
len += 1;
str = malloc(len);
if (str == NULL)
err(1, NULL);
(void)strlcpy(str, "Cookie:", len);
TAILQ_FOREACH(ck, &tempjar, tempentry) {
head = str + strlen(str);
headlen = len - strlen(str);
snprintf(head, headlen, "%s %s=%s",
(ck == TAILQ_FIRST(&tempjar))? "" : ";", ck->key, ck->val);
}
if (strlcat(str, "\r\n", len) >= len)
errx(1, "cookie header truncated");
*pstr = str;
}
#endif /* !SMALL */
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