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openssl/fuzz/asn1.c
Rich Salz 9f08a1c63e Install custom RAND_METHOD for fuzzing 
Instead of setting a "magic" global variable to force RAND to keep
consistent state and always generate the same bytestream, have
the fuzzing code install its own RAND_METHOD that does this.  For
BN_RAND_DEBUG, we just don't do it; that debugging was about mucking
with BN's internal representation, not requiring predictable rand
bytes.

Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/4025)
2017-07-26 19:27:54 -04:00

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/*
* Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL licenses, (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* https://www.openssl.org/source/license.html
* or in the file LICENSE in the source distribution.
*/
/*
* Fuzz ASN.1 parsing for various data structures. Specify which on the
* command line:
*
* asn1 <data structure>
*/
#include <stdio.h>
#include <string.h>
#include <openssl/asn1.h>
#include <openssl/asn1t.h>
#include <openssl/dh.h>
#include <openssl/ec.h>
#include <openssl/ocsp.h>
#include <openssl/pkcs12.h>
#include <openssl/rsa.h>
#include <openssl/ts.h>
#include <openssl/x509v3.h>
#include <openssl/cms.h>
#include <openssl/err.h>
#include <openssl/rand.h>
#include "fuzzer.h"
static ASN1_ITEM_EXP *item_type[] = {
ASN1_ITEM_ref(ACCESS_DESCRIPTION),
#ifndef OPENSSL_NO_RFC3779
ASN1_ITEM_ref(ASIdentifierChoice),
ASN1_ITEM_ref(ASIdentifiers),
ASN1_ITEM_ref(ASIdOrRange),
#endif
ASN1_ITEM_ref(ASN1_ANY),
ASN1_ITEM_ref(ASN1_BIT_STRING),
ASN1_ITEM_ref(ASN1_BMPSTRING),
ASN1_ITEM_ref(ASN1_BOOLEAN),
ASN1_ITEM_ref(ASN1_ENUMERATED),
ASN1_ITEM_ref(ASN1_FBOOLEAN),
ASN1_ITEM_ref(ASN1_GENERALIZEDTIME),
ASN1_ITEM_ref(ASN1_GENERALSTRING),
ASN1_ITEM_ref(ASN1_IA5STRING),
ASN1_ITEM_ref(ASN1_INTEGER),
ASN1_ITEM_ref(ASN1_NULL),
ASN1_ITEM_ref(ASN1_OBJECT),
ASN1_ITEM_ref(ASN1_OCTET_STRING),
ASN1_ITEM_ref(ASN1_OCTET_STRING_NDEF),
ASN1_ITEM_ref(ASN1_PRINTABLE),
ASN1_ITEM_ref(ASN1_PRINTABLESTRING),
ASN1_ITEM_ref(ASN1_SEQUENCE),
ASN1_ITEM_ref(ASN1_SEQUENCE_ANY),
ASN1_ITEM_ref(ASN1_SET_ANY),
ASN1_ITEM_ref(ASN1_T61STRING),
ASN1_ITEM_ref(ASN1_TBOOLEAN),
ASN1_ITEM_ref(ASN1_TIME),
ASN1_ITEM_ref(ASN1_UNIVERSALSTRING),
ASN1_ITEM_ref(ASN1_UTCTIME),
ASN1_ITEM_ref(ASN1_UTF8STRING),
ASN1_ITEM_ref(ASN1_VISIBLESTRING),
#ifndef OPENSSL_NO_RFC3779
ASN1_ITEM_ref(ASRange),
#endif
ASN1_ITEM_ref(AUTHORITY_INFO_ACCESS),
ASN1_ITEM_ref(AUTHORITY_KEYID),
ASN1_ITEM_ref(BASIC_CONSTRAINTS),
ASN1_ITEM_ref(BIGNUM),
ASN1_ITEM_ref(CBIGNUM),
ASN1_ITEM_ref(CERTIFICATEPOLICIES),
#ifndef OPENSSL_NO_CMS
ASN1_ITEM_ref(CMS_ContentInfo),
ASN1_ITEM_ref(CMS_ReceiptRequest),
ASN1_ITEM_ref(CRL_DIST_POINTS),
#endif
#ifndef OPENSSL_NO_DH
ASN1_ITEM_ref(DHparams),
#endif
ASN1_ITEM_ref(DIRECTORYSTRING),
ASN1_ITEM_ref(DISPLAYTEXT),
ASN1_ITEM_ref(DIST_POINT),
ASN1_ITEM_ref(DIST_POINT_NAME),
#ifndef OPENSSL_NO_EC
ASN1_ITEM_ref(ECPARAMETERS),
ASN1_ITEM_ref(ECPKPARAMETERS),
#endif
ASN1_ITEM_ref(EDIPARTYNAME),
ASN1_ITEM_ref(EXTENDED_KEY_USAGE),
ASN1_ITEM_ref(GENERAL_NAME),
ASN1_ITEM_ref(GENERAL_NAMES),
ASN1_ITEM_ref(GENERAL_SUBTREE),
#ifndef OPENSSL_NO_RFC3779
ASN1_ITEM_ref(IPAddressChoice),
ASN1_ITEM_ref(IPAddressFamily),
ASN1_ITEM_ref(IPAddressOrRange),
ASN1_ITEM_ref(IPAddressRange),
#endif
ASN1_ITEM_ref(ISSUING_DIST_POINT),
#if OPENSSL_API_COMPAT < 0x10200000L
ASN1_ITEM_ref(LONG),
#endif
ASN1_ITEM_ref(NAME_CONSTRAINTS),
ASN1_ITEM_ref(NETSCAPE_CERT_SEQUENCE),
ASN1_ITEM_ref(NETSCAPE_SPKAC),
ASN1_ITEM_ref(NETSCAPE_SPKI),
ASN1_ITEM_ref(NOTICEREF),
#ifndef OPENSSL_NO_OCSP
ASN1_ITEM_ref(OCSP_BASICRESP),
ASN1_ITEM_ref(OCSP_CERTID),
ASN1_ITEM_ref(OCSP_CERTSTATUS),
ASN1_ITEM_ref(OCSP_CRLID),
ASN1_ITEM_ref(OCSP_ONEREQ),
ASN1_ITEM_ref(OCSP_REQINFO),
ASN1_ITEM_ref(OCSP_REQUEST),
ASN1_ITEM_ref(OCSP_RESPBYTES),
ASN1_ITEM_ref(OCSP_RESPDATA),
ASN1_ITEM_ref(OCSP_RESPID),
ASN1_ITEM_ref(OCSP_RESPONSE),
ASN1_ITEM_ref(OCSP_REVOKEDINFO),
ASN1_ITEM_ref(OCSP_SERVICELOC),
ASN1_ITEM_ref(OCSP_SIGNATURE),
ASN1_ITEM_ref(OCSP_SINGLERESP),
#endif
ASN1_ITEM_ref(OTHERNAME),
ASN1_ITEM_ref(PBE2PARAM),
ASN1_ITEM_ref(PBEPARAM),
ASN1_ITEM_ref(PBKDF2PARAM),
ASN1_ITEM_ref(PKCS12),
ASN1_ITEM_ref(PKCS12_AUTHSAFES),
ASN1_ITEM_ref(PKCS12_BAGS),
ASN1_ITEM_ref(PKCS12_MAC_DATA),
ASN1_ITEM_ref(PKCS12_SAFEBAG),
ASN1_ITEM_ref(PKCS12_SAFEBAGS),
ASN1_ITEM_ref(PKCS7),
ASN1_ITEM_ref(PKCS7_ATTR_SIGN),
ASN1_ITEM_ref(PKCS7_ATTR_VERIFY),
ASN1_ITEM_ref(PKCS7_DIGEST),
ASN1_ITEM_ref(PKCS7_ENC_CONTENT),
ASN1_ITEM_ref(PKCS7_ENCRYPT),
ASN1_ITEM_ref(PKCS7_ENVELOPE),
ASN1_ITEM_ref(PKCS7_ISSUER_AND_SERIAL),
ASN1_ITEM_ref(PKCS7_RECIP_INFO),
ASN1_ITEM_ref(PKCS7_SIGNED),
ASN1_ITEM_ref(PKCS7_SIGN_ENVELOPE),
ASN1_ITEM_ref(PKCS7_SIGNER_INFO),
ASN1_ITEM_ref(PKCS8_PRIV_KEY_INFO),
ASN1_ITEM_ref(PKEY_USAGE_PERIOD),
ASN1_ITEM_ref(POLICY_CONSTRAINTS),
ASN1_ITEM_ref(POLICYINFO),
ASN1_ITEM_ref(POLICY_MAPPING),
ASN1_ITEM_ref(POLICY_MAPPINGS),
ASN1_ITEM_ref(POLICYQUALINFO),
ASN1_ITEM_ref(PROXY_CERT_INFO_EXTENSION),
ASN1_ITEM_ref(PROXY_POLICY),
ASN1_ITEM_ref(RSA_OAEP_PARAMS),
ASN1_ITEM_ref(RSAPrivateKey),
ASN1_ITEM_ref(RSA_PSS_PARAMS),
ASN1_ITEM_ref(RSAPublicKey),
ASN1_ITEM_ref(SXNET),
ASN1_ITEM_ref(SXNETID),
/*ASN1_ITEM_ref(TS_RESP), want to do this, but type is hidden, however d2i exists... */
ASN1_ITEM_ref(USERNOTICE),
ASN1_ITEM_ref(X509),
ASN1_ITEM_ref(X509_ALGOR),
ASN1_ITEM_ref(X509_ALGORS),
ASN1_ITEM_ref(X509_ATTRIBUTE),
ASN1_ITEM_ref(X509_CERT_AUX),
ASN1_ITEM_ref(X509_CINF),
ASN1_ITEM_ref(X509_CRL),
ASN1_ITEM_ref(X509_CRL_INFO),
ASN1_ITEM_ref(X509_EXTENSION),
ASN1_ITEM_ref(X509_EXTENSIONS),
ASN1_ITEM_ref(X509_NAME),
ASN1_ITEM_ref(X509_NAME_ENTRY),
ASN1_ITEM_ref(X509_PUBKEY),
ASN1_ITEM_ref(X509_REQ),
ASN1_ITEM_ref(X509_REQ_INFO),
ASN1_ITEM_ref(X509_REVOKED),
ASN1_ITEM_ref(X509_SIG),
ASN1_ITEM_ref(X509_VAL),
#if OPENSSL_API_COMPAT < 0x10200000L
ASN1_ITEM_ref(ZLONG),
#endif
ASN1_ITEM_ref(INT32),
ASN1_ITEM_ref(ZINT32),
ASN1_ITEM_ref(UINT32),
ASN1_ITEM_ref(ZUINT32),
ASN1_ITEM_ref(INT64),
ASN1_ITEM_ref(ZINT64),
ASN1_ITEM_ref(UINT64),
ASN1_ITEM_ref(ZUINT64),
NULL
};
static ASN1_PCTX *pctx;
int FuzzerInitialize(int *argc, char ***argv)
{
pctx = ASN1_PCTX_new();
ASN1_PCTX_set_flags(pctx, ASN1_PCTX_FLAGS_SHOW_ABSENT |
ASN1_PCTX_FLAGS_SHOW_SEQUENCE | ASN1_PCTX_FLAGS_SHOW_SSOF |
ASN1_PCTX_FLAGS_SHOW_TYPE | ASN1_PCTX_FLAGS_SHOW_FIELD_STRUCT_NAME);
ASN1_PCTX_set_str_flags(pctx, ASN1_STRFLGS_UTF8_CONVERT |
ASN1_STRFLGS_SHOW_TYPE | ASN1_STRFLGS_DUMP_ALL);
OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CRYPTO_STRINGS, NULL);
ERR_get_state();
CRYPTO_free_ex_index(0, -1);
FuzzerSetRand();
return 1;
}
int FuzzerTestOneInput(const uint8_t *buf, size_t len)
{
int n;
for (n = 0; item_type[n] != NULL; ++n) {
const uint8_t *b = buf;
unsigned char *der = NULL;
const ASN1_ITEM *i = ASN1_ITEM_ptr(item_type[n]);
ASN1_VALUE *o = ASN1_item_d2i(NULL, &b, len, i);
if (o != NULL) {
BIO *bio = BIO_new(BIO_s_null());
ASN1_item_print(bio, o, 4, i, pctx);
BIO_free(bio);
ASN1_item_i2d(o, &der, i);
OPENSSL_free(der);
ASN1_item_free(o, i);
}
}
ERR_clear_error();
return 0;
}
void FuzzerCleanup(void)
{
ASN1_PCTX_free(pctx);
}
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