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fuzz: add punycode decoder fuzz test

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Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Dmitry Belyavskiy <beldmit@gmail.com>
(Merged from https://github.com/openssl/openssl/pull/19591)
This commit is contained in:
Pauli 2022-11-04 08:43:38 +11:00
parent 905ba92439
commit 8aa82b3370
6 changed files with 57 additions and 0 deletions
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10
fuzz/build.info
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@ -10,6 +10,7 @@
IF[{- !$disabled{"fuzz-afl"} || !$disabled{"fuzz-libfuzzer"} -}]
PROGRAMS{noinst}=asn1 asn1parse bignum bndiv client conf crl server x509
PROGRAMS{noinst}=punycode
IF[{- !$disabled{"cmp"} -}]
PROGRAMS{noinst}=cmp
@ -63,6 +64,10 @@ IF[{- !$disabled{"fuzz-afl"} || !$disabled{"fuzz-libfuzzer"} -}]
INCLUDE[ct]=../include {- $ex_inc -}
DEPEND[ct]=../libcrypto {- $ex_lib -}
SOURCE[punycode]=punycode.c driver.c
INCLUDE[punycode]=../include {- $ex_inc -}
DEPEND[punycode]=../libcrypto.a {- $ex_lib -}
SOURCE[server]=server.c driver.c fuzz_rand.c
INCLUDE[server]=../include {- $ex_inc -}
DEPEND[server]=../libcrypto ../libssl {- $ex_lib -}
@ -74,6 +79,7 @@ ENDIF
IF[{- !$disabled{tests} -}]
PROGRAMS{noinst}=asn1-test asn1parse-test bignum-test bndiv-test client-test conf-test crl-test server-test x509-test
PROGRAMS{noinst}=punycode-test
IF[{- !$disabled{"cmp"} -}]
PROGRAMS{noinst}=cmp-test
@ -128,6 +134,10 @@ IF[{- !$disabled{tests} -}]
INCLUDE[ct-test]=../include
DEPEND[ct-test]=../libcrypto
SOURCE[punycode-test]=punycode.c test-corpus.c
INCLUDE[punycode-test]=../include
DEPEND[punycode-test]=../libcrypto.a
SOURCE[server-test]=server.c test-corpus.c fuzz_rand.c
INCLUDE[server-test]=../include
DEPEND[server-test]=../libcrypto ../libssl

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fuzz/corpora/punycode/0000000000000000000000000000000000000000 Normal file
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3
fuzz/fuzzer.h
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@ -8,6 +8,9 @@
* or in the file LICENSE in the source distribution.
*/
#include <stdint.h> /* for uint8_t */
#include <stddef.h> /* for size_t */
int FuzzerTestOneInput(const uint8_t *buf, size_t len);
int FuzzerInitialize(int *argc, char ***argv);
void FuzzerCleanup(void);

42
fuzz/punycode.c Normal file
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@ -0,0 +1,42 @@
/*
* Copyright 2022 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include "crypto/punycode.h"
#include "internal/nelem.h"
#include <openssl/crypto.h>
#include "fuzzer.h"
#include <stdio.h>
#include <string.h>
int FuzzerInitialize(int *argc, char ***argv)
{
return 1;
}
int FuzzerTestOneInput(const uint8_t *buf, size_t len)
{
char *b;
unsigned int out[16], outlen = OSSL_NELEM(out);
char outc[16];
b = OPENSSL_malloc(len + 1);
if (b != NULL) {
ossl_punycode_decode((const char *)buf, len, out, &outlen);
memcpy(b, buf, len);
b[len] = '\0';
ossl_a2ulabel(b, outc, sizeof(outc));
OPENSSL_free(b);
}
return 0;
}
void FuzzerCleanup(void)
{
}

2
include/crypto/punycode.h
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@ -11,6 +11,8 @@
# define OSSL_CRYPTO_PUNYCODE_H
# pragma once
# include <stddef.h> /* for size_t */
int ossl_punycode_decode (
const char *pEncoded,
const size_t enc_len,