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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/ec.h>
#include <openssl/ocsp.h>
#include <openssl/pkcs12.h>
#include <openssl/ts.h>
#include <openssl/x509v3.h>
#include "fuzzer.h"
static ASN1_ITEM_EXP *item_type[] = {
ASN1_ITEM_ref(ASN1_SEQUENCE),
ASN1_ITEM_ref(AUTHORITY_INFO_ACCESS),
ASN1_ITEM_ref(BIGNUM),
#ifndef OPENSSL_NO_EC
ASN1_ITEM_ref(ECPARAMETERS),
ASN1_ITEM_ref(ECPKPARAMETERS),
#endif
ASN1_ITEM_ref(GENERAL_NAME),
ASN1_ITEM_ref(GENERAL_SUBTREE),
ASN1_ITEM_ref(NAME_CONSTRAINTS),
ASN1_ITEM_ref(OCSP_BASICRESP),
ASN1_ITEM_ref(OCSP_RESPONSE),
ASN1_ITEM_ref(PKCS12),
ASN1_ITEM_ref(PKCS12_AUTHSAFES),
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_RECIP_INFO),
ASN1_ITEM_ref(PKCS7_SIGN_ENVELOPE),
ASN1_ITEM_ref(PKCS7_SIGNED),
ASN1_ITEM_ref(PKCS7_SIGNER_INFO),
ASN1_ITEM_ref(POLICY_CONSTRAINTS),
ASN1_ITEM_ref(POLICY_MAPPINGS),
ASN1_ITEM_ref(SXNET),
/*ASN1_ITEM_ref(TS_RESP), want to do this, but type is hidden, however d2i exists... */
ASN1_ITEM_ref(X509),
ASN1_ITEM_ref(X509_CRL),
NULL
};
int FuzzerInitialize(int *argc, char ***argv) {
return 1;
}
int FuzzerTestOneInput(const uint8_t *buf, size_t len) {
int n;
ASN1_PCTX *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);
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);
}
}
ASN1_PCTX_free(pctx);
return 0;
}
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