mirror of
https://github.com/curl/curl.git
synced 2024-12-27 06:59:43 +08:00
a13ef31d0f
Allow UNITTEST_STOP to return the error code, use the fail & abort macros to indicate test failure and return success instead of fail if the unit test can't test anything because of missing features at compile-time. A couple of tests could never fail because they were overriding the failure return code.
191 lines
6.8 KiB
C
191 lines
6.8 KiB
C
/***************************************************************************
|
|
* _ _ ____ _
|
|
* Project ___| | | | _ \| |
|
|
* / __| | | | |_) | |
|
|
* | (__| |_| | _ <| |___
|
|
* \___|\___/|_| \_\_____|
|
|
*
|
|
* Copyright (C) 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.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.
|
|
*
|
|
* SPDX-License-Identifier: curl
|
|
*
|
|
***************************************************************************/
|
|
#include "curlcheck.h"
|
|
|
|
#include "doh.h" /* from the lib dir */
|
|
|
|
static CURLcode unit_setup(void)
|
|
{
|
|
/* whatever you want done first */
|
|
return CURLE_OK;
|
|
}
|
|
|
|
static void unit_stop(void)
|
|
{
|
|
/* done before shutting down and exiting */
|
|
}
|
|
|
|
#ifndef CURL_DISABLE_DOH
|
|
|
|
UNITTEST_START
|
|
|
|
/*
|
|
* Prove detection of write overflow using a short buffer and a name
|
|
* of maximal valid length.
|
|
*
|
|
* Prove detection of other invalid input.
|
|
*/
|
|
do {
|
|
static const char max[] =
|
|
/* ..|....1.........2.........3.........4.........5.........6... */
|
|
/* 3456789012345678901234567890123456789012345678901234567890123 */
|
|
"this.is.a.maximum-length.hostname." /* 34: 34 */
|
|
"with-no-label-of-greater-length-than-the-sixty-three-characters."
|
|
/* 64: 98 */
|
|
"specified.in.the.RFCs." /* 22: 120 */
|
|
"and.with.a.QNAME.encoding.whose.length.is.exactly." /* 50: 170 */
|
|
"the.maximum.length.allowed." /* 27: 197 */
|
|
"that.is.two-hundred.and.fifty-six." /* 34: 231 */
|
|
"including.the.last.null." /* 24: 255 */
|
|
"";
|
|
static const char toolong[] =
|
|
/* ..|....1.........2.........3.........4.........5.........6... */
|
|
/* 3456789012345678901234567890123456789012345678901234567890123 */
|
|
"here.is.a.hostname.which.is.just.barely.too.long." /* 49: 49 */
|
|
"to.be.encoded.as.a.QNAME.of.the.maximum.allowed.length."
|
|
/* 55: 104 */
|
|
"which.is.256.including.a.final.zero-length.label." /* 49: 153 */
|
|
"representing.the.root.node.so.that.a.name.with." /* 47: 200 */
|
|
"a.trailing.dot.may.have.up.to." /* 30: 230 */
|
|
"255.characters.never.more." /* 26: 256 */
|
|
"";
|
|
static const char emptylabel[] =
|
|
"this.is.an.otherwise-valid.hostname."
|
|
".with.an.empty.label.";
|
|
static const char outsizelabel[] =
|
|
"this.is.an.otherwise-valid.hostname."
|
|
"with-a-label-of-greater-length-than-the-sixty-three-characters-"
|
|
"specified.in.the.RFCs.";
|
|
int i;
|
|
|
|
struct test {
|
|
const char *name;
|
|
const DOHcode expected_result;
|
|
};
|
|
|
|
/* plays the role of struct dnsprobe in urldata.h */
|
|
struct demo {
|
|
unsigned char dohbuffer[255 + 16]; /* deliberately short buffer */
|
|
unsigned char canary1;
|
|
unsigned char canary2;
|
|
unsigned char canary3;
|
|
};
|
|
|
|
const struct test playlist[4] = {
|
|
{ toolong, DOH_DNS_NAME_TOO_LONG }, /* expect early failure */
|
|
{ emptylabel, DOH_DNS_BAD_LABEL }, /* also */
|
|
{ outsizelabel, DOH_DNS_BAD_LABEL }, /* also */
|
|
{ max, DOH_OK } /* expect buffer overwrite */
|
|
};
|
|
|
|
for(i = 0; i < (int)(sizeof(playlist)/sizeof(*playlist)); i++) {
|
|
const char *name = playlist[i].name;
|
|
size_t olen = 100000;
|
|
struct demo victim;
|
|
DOHcode d;
|
|
|
|
victim.canary1 = 87; /* magic numbers, arbitrarily picked */
|
|
victim.canary2 = 35;
|
|
victim.canary3 = 41;
|
|
d = doh_encode(name, DNS_TYPE_A, victim.dohbuffer,
|
|
sizeof(struct demo), /* allow room for overflow */
|
|
&olen);
|
|
|
|
fail_unless(d == playlist[i].expected_result,
|
|
"result returned was not as expected");
|
|
if(d == playlist[i].expected_result) {
|
|
if(name == max) {
|
|
fail_if(victim.canary1 == 87,
|
|
"demo one-byte buffer overwrite did not happen");
|
|
}
|
|
else {
|
|
fail_unless(victim.canary1 == 87,
|
|
"one-byte buffer overwrite has happened");
|
|
}
|
|
fail_unless(victim.canary2 == 35,
|
|
"two-byte buffer overwrite has happened");
|
|
fail_unless(victim.canary3 == 41,
|
|
"three-byte buffer overwrite has happened");
|
|
}
|
|
else {
|
|
if(d == DOH_OK) {
|
|
fail_unless(olen <= sizeof(victim.dohbuffer), "wrote outside bounds");
|
|
fail_unless(olen > strlen(name), "unrealistic low size");
|
|
}
|
|
}
|
|
}
|
|
} while(0);
|
|
|
|
/* run normal cases and try to trigger buffer length related errors */
|
|
do {
|
|
DNStype dnstype = DNS_TYPE_A;
|
|
unsigned char buffer[128];
|
|
const size_t buflen = sizeof(buffer);
|
|
const size_t magic1 = 9765;
|
|
size_t olen1 = magic1;
|
|
const char *sunshine1 = "a.com";
|
|
const char *dotshine1 = "a.com.";
|
|
const char *sunshine2 = "aa.com";
|
|
size_t olen2;
|
|
DOHcode ret2;
|
|
size_t olen;
|
|
|
|
DOHcode ret = doh_encode(sunshine1, dnstype, buffer, buflen, &olen1);
|
|
fail_unless(ret == DOH_OK, "sunshine case 1 should pass fine");
|
|
fail_if(olen1 == magic1, "olen has not been assigned properly");
|
|
fail_unless(olen1 > strlen(sunshine1), "bad out length");
|
|
|
|
/* with a trailing dot, the response should have the same length */
|
|
olen2 = magic1;
|
|
ret2 = doh_encode(dotshine1, dnstype, buffer, buflen, &olen2);
|
|
fail_unless(ret2 == DOH_OK, "dotshine case should pass fine");
|
|
fail_if(olen2 == magic1, "olen has not been assigned properly");
|
|
fail_unless(olen1 == olen2, "olen should not grow for a trailing dot");
|
|
|
|
/* add one letter, the response should be one longer */
|
|
olen2 = magic1;
|
|
ret2 = doh_encode(sunshine2, dnstype, buffer, buflen, &olen2);
|
|
fail_unless(ret2 == DOH_OK, "sunshine case 2 should pass fine");
|
|
fail_if(olen2 == magic1, "olen has not been assigned properly");
|
|
fail_unless(olen1 + 1 == olen2, "olen should grow with the hostname");
|
|
|
|
/* pass a short buffer, should fail */
|
|
ret = doh_encode(sunshine1, dnstype, buffer, olen1 - 1, &olen);
|
|
fail_if(ret == DOH_OK, "short buffer should have been noticed");
|
|
|
|
/* pass a minimum buffer, should succeed */
|
|
ret = doh_encode(sunshine1, dnstype, buffer, olen1, &olen);
|
|
fail_unless(ret == DOH_OK, "minimal length buffer should be long enough");
|
|
fail_unless(olen == olen1, "bad buffer length");
|
|
} while(0);
|
|
UNITTEST_STOP
|
|
|
|
#else /* CURL_DISABLE_DOH */
|
|
|
|
UNITTEST_START
|
|
/* nothing to do, just succeed */
|
|
UNITTEST_STOP
|
|
|
|
#endif
|