fuzz/asn1.c

   1 /*
   2  * Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL licenses, (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  * https://www.openssl.org/source/license.html
   8  * or in the file LICENSE in the source distribution.
   9  */
  10
  11 /*
  12  * Fuzz ASN.1 parsing for various data structures. Specify which on the
  13  * command line:
  14  *
  15  * asn1 <data structure>
  16  */
  17
  18 #include <stdio.h>
  19 #include <string.h>
  20 #include <openssl/asn1.h>
  21 #include <openssl/asn1t.h>
  22 #include <openssl/dh.h>
  23 #include <openssl/ec.h>
  24 #include <openssl/ocsp.h>
  25 #include <openssl/pkcs12.h>
  26 #include <openssl/rsa.h>
  27 #include <openssl/ts.h>
  28 #include <openssl/x509v3.h>
  29 #include <openssl/cms.h>
  30 #include <openssl/err.h>
  31 #include <openssl/rand.h>
  32 #include "fuzzer.h"
  33
  34 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
  35 extern int rand_predictable;
  36 #endif
  37 #define ENTROPY_NEEDED 32
  38
  39 static ASN1_ITEM_EXP *item_type[] = {
  40     ASN1_ITEM_ref(ACCESS_DESCRIPTION),
  41 #ifndef OPENSSL_NO_RFC3779
  42     ASN1_ITEM_ref(ASIdentifierChoice),
  43     ASN1_ITEM_ref(ASIdentifiers),
  44     ASN1_ITEM_ref(ASIdOrRange),
  45 #endif
  46     ASN1_ITEM_ref(ASN1_ANY),
  47     ASN1_ITEM_ref(ASN1_BIT_STRING),
  48     ASN1_ITEM_ref(ASN1_BMPSTRING),
  49     ASN1_ITEM_ref(ASN1_BOOLEAN),
  50     ASN1_ITEM_ref(ASN1_ENUMERATED),
  51     ASN1_ITEM_ref(ASN1_FBOOLEAN),
  52     ASN1_ITEM_ref(ASN1_GENERALIZEDTIME),
  53     ASN1_ITEM_ref(ASN1_GENERALSTRING),
  54     ASN1_ITEM_ref(ASN1_IA5STRING),
  55     ASN1_ITEM_ref(ASN1_INTEGER),
  56     ASN1_ITEM_ref(ASN1_NULL),
  57     ASN1_ITEM_ref(ASN1_OBJECT),
  58     ASN1_ITEM_ref(ASN1_OCTET_STRING),
  59     ASN1_ITEM_ref(ASN1_OCTET_STRING_NDEF),
  60     ASN1_ITEM_ref(ASN1_PRINTABLE),
  61     ASN1_ITEM_ref(ASN1_PRINTABLESTRING),
  62     ASN1_ITEM_ref(ASN1_SEQUENCE),
  63     ASN1_ITEM_ref(ASN1_SEQUENCE_ANY),
  64     ASN1_ITEM_ref(ASN1_SET_ANY),
  65     ASN1_ITEM_ref(ASN1_T61STRING),
  66     ASN1_ITEM_ref(ASN1_TBOOLEAN),
  67     ASN1_ITEM_ref(ASN1_TIME),
  68     ASN1_ITEM_ref(ASN1_UNIVERSALSTRING),
  69     ASN1_ITEM_ref(ASN1_UTCTIME),
  70     ASN1_ITEM_ref(ASN1_UTF8STRING),
  71     ASN1_ITEM_ref(ASN1_VISIBLESTRING),
  72 #ifndef OPENSSL_NO_RFC3779
  73     ASN1_ITEM_ref(ASRange),
  74 #endif
  75     ASN1_ITEM_ref(AUTHORITY_INFO_ACCESS),
  76     ASN1_ITEM_ref(AUTHORITY_KEYID),
  77     ASN1_ITEM_ref(BASIC_CONSTRAINTS),
  78     ASN1_ITEM_ref(BIGNUM),
  79     ASN1_ITEM_ref(CBIGNUM),
  80     ASN1_ITEM_ref(CERTIFICATEPOLICIES),
  81 #ifndef OPENSSL_NO_CMS
  82     ASN1_ITEM_ref(CMS_ContentInfo),
  83     ASN1_ITEM_ref(CMS_ReceiptRequest),
  84     ASN1_ITEM_ref(CRL_DIST_POINTS),
  85 #endif
  86 #ifndef OPENSSL_NO_DH
  87     ASN1_ITEM_ref(DHparams),
  88 #endif
  89     ASN1_ITEM_ref(DIRECTORYSTRING),
  90     ASN1_ITEM_ref(DISPLAYTEXT),
  91     ASN1_ITEM_ref(DIST_POINT),
  92     ASN1_ITEM_ref(DIST_POINT_NAME),
  93 #ifndef OPENSSL_NO_EC
  94     ASN1_ITEM_ref(ECPARAMETERS),
  95     ASN1_ITEM_ref(ECPKPARAMETERS),
  96 #endif
  97     ASN1_ITEM_ref(EDIPARTYNAME),
  98     ASN1_ITEM_ref(EXTENDED_KEY_USAGE),
  99     ASN1_ITEM_ref(GENERAL_NAME),
 100     ASN1_ITEM_ref(GENERAL_NAMES),
 101     ASN1_ITEM_ref(GENERAL_SUBTREE),
 102 #ifndef OPENSSL_NO_RFC3779
 103     ASN1_ITEM_ref(IPAddressChoice),
 104     ASN1_ITEM_ref(IPAddressFamily),
 105     ASN1_ITEM_ref(IPAddressOrRange),
 106     ASN1_ITEM_ref(IPAddressRange),
 107 #endif
 108     ASN1_ITEM_ref(ISSUING_DIST_POINT),
 109 #if OPENSSL_API_COMPAT < 0x10200000L
 110     ASN1_ITEM_ref(LONG),
 111 #endif
 112     ASN1_ITEM_ref(NAME_CONSTRAINTS),
 113     ASN1_ITEM_ref(NETSCAPE_CERT_SEQUENCE),
 114     ASN1_ITEM_ref(NETSCAPE_SPKAC),
 115     ASN1_ITEM_ref(NETSCAPE_SPKI),
 116     ASN1_ITEM_ref(NOTICEREF),
 117 #ifndef OPENSSL_NO_OCSP
 118     ASN1_ITEM_ref(OCSP_BASICRESP),
 119     ASN1_ITEM_ref(OCSP_CERTID),
 120     ASN1_ITEM_ref(OCSP_CERTSTATUS),
 121     ASN1_ITEM_ref(OCSP_CRLID),
 122     ASN1_ITEM_ref(OCSP_ONEREQ),
 123     ASN1_ITEM_ref(OCSP_REQINFO),
 124     ASN1_ITEM_ref(OCSP_REQUEST),
 125     ASN1_ITEM_ref(OCSP_RESPBYTES),
 126     ASN1_ITEM_ref(OCSP_RESPDATA),
 127     ASN1_ITEM_ref(OCSP_RESPID),
 128     ASN1_ITEM_ref(OCSP_RESPONSE),
 129     ASN1_ITEM_ref(OCSP_REVOKEDINFO),
 130     ASN1_ITEM_ref(OCSP_SERVICELOC),
 131     ASN1_ITEM_ref(OCSP_SIGNATURE),
 132     ASN1_ITEM_ref(OCSP_SINGLERESP),
 133 #endif
 134     ASN1_ITEM_ref(OTHERNAME),
 135     ASN1_ITEM_ref(PBE2PARAM),
 136     ASN1_ITEM_ref(PBEPARAM),
 137     ASN1_ITEM_ref(PBKDF2PARAM),
 138     ASN1_ITEM_ref(PKCS12),
 139     ASN1_ITEM_ref(PKCS12_AUTHSAFES),
 140     ASN1_ITEM_ref(PKCS12_BAGS),
 141     ASN1_ITEM_ref(PKCS12_MAC_DATA),
 142     ASN1_ITEM_ref(PKCS12_SAFEBAG),
 143     ASN1_ITEM_ref(PKCS12_SAFEBAGS),
 144     ASN1_ITEM_ref(PKCS7),
 145     ASN1_ITEM_ref(PKCS7_ATTR_SIGN),
 146     ASN1_ITEM_ref(PKCS7_ATTR_VERIFY),
 147     ASN1_ITEM_ref(PKCS7_DIGEST),
 148     ASN1_ITEM_ref(PKCS7_ENC_CONTENT),
 149     ASN1_ITEM_ref(PKCS7_ENCRYPT),
 150     ASN1_ITEM_ref(PKCS7_ENVELOPE),
 151     ASN1_ITEM_ref(PKCS7_ISSUER_AND_SERIAL),
 152     ASN1_ITEM_ref(PKCS7_RECIP_INFO),
 153     ASN1_ITEM_ref(PKCS7_SIGNED),
 154     ASN1_ITEM_ref(PKCS7_SIGN_ENVELOPE),
 155     ASN1_ITEM_ref(PKCS7_SIGNER_INFO),
 156     ASN1_ITEM_ref(PKCS8_PRIV_KEY_INFO),
 157     ASN1_ITEM_ref(PKEY_USAGE_PERIOD),
 158     ASN1_ITEM_ref(POLICY_CONSTRAINTS),
 159     ASN1_ITEM_ref(POLICYINFO),
 160     ASN1_ITEM_ref(POLICY_MAPPING),
 161     ASN1_ITEM_ref(POLICY_MAPPINGS),
 162     ASN1_ITEM_ref(POLICYQUALINFO),
 163     ASN1_ITEM_ref(PROXY_CERT_INFO_EXTENSION),
 164     ASN1_ITEM_ref(PROXY_POLICY),
 165     ASN1_ITEM_ref(RSA_OAEP_PARAMS),
 166     ASN1_ITEM_ref(RSAPrivateKey),
 167     ASN1_ITEM_ref(RSA_PSS_PARAMS),
 168     ASN1_ITEM_ref(RSAPublicKey),
 169     ASN1_ITEM_ref(SXNET),
 170     ASN1_ITEM_ref(SXNETID),
 171     /*ASN1_ITEM_ref(TS_RESP),  want to do this, but type is hidden, however d2i exists... */
 172     ASN1_ITEM_ref(USERNOTICE),
 173     ASN1_ITEM_ref(X509),
 174     ASN1_ITEM_ref(X509_ALGOR),
 175     ASN1_ITEM_ref(X509_ALGORS),
 176     ASN1_ITEM_ref(X509_ATTRIBUTE),
 177     ASN1_ITEM_ref(X509_CERT_AUX),
 178     ASN1_ITEM_ref(X509_CINF),
 179     ASN1_ITEM_ref(X509_CRL),
 180     ASN1_ITEM_ref(X509_CRL_INFO),
 181     ASN1_ITEM_ref(X509_EXTENSION),
 182     ASN1_ITEM_ref(X509_EXTENSIONS),
 183     ASN1_ITEM_ref(X509_NAME),
 184     ASN1_ITEM_ref(X509_NAME_ENTRY),
 185     ASN1_ITEM_ref(X509_PUBKEY),
 186     ASN1_ITEM_ref(X509_REQ),
 187     ASN1_ITEM_ref(X509_REQ_INFO),
 188     ASN1_ITEM_ref(X509_REVOKED),
 189     ASN1_ITEM_ref(X509_SIG),
 190     ASN1_ITEM_ref(X509_VAL),
 191 #if OPENSSL_API_COMPAT < 0x10200000L
 192     ASN1_ITEM_ref(ZLONG),
 193 #endif
 194     ASN1_ITEM_ref(INT32),
 195     ASN1_ITEM_ref(ZINT32),
 196     ASN1_ITEM_ref(UINT32),
 197     ASN1_ITEM_ref(ZUINT32),
 198     ASN1_ITEM_ref(INT64),
 199     ASN1_ITEM_ref(ZINT64),
 200     ASN1_ITEM_ref(UINT64),
 201     ASN1_ITEM_ref(ZUINT64),
 202     NULL
 203 };
 204
 205 static ASN1_PCTX *pctx;
 206
 207 int FuzzerInitialize(int *argc, char ***argv)
 208 {
 209     pctx = ASN1_PCTX_new();
 210     ASN1_PCTX_set_flags(pctx, ASN1_PCTX_FLAGS_SHOW_ABSENT |
 211         ASN1_PCTX_FLAGS_SHOW_SEQUENCE | ASN1_PCTX_FLAGS_SHOW_SSOF |
 212         ASN1_PCTX_FLAGS_SHOW_TYPE | ASN1_PCTX_FLAGS_SHOW_FIELD_STRUCT_NAME);
 213     ASN1_PCTX_set_str_flags(pctx, ASN1_STRFLGS_UTF8_CONVERT |
 214         ASN1_STRFLGS_SHOW_TYPE | ASN1_STRFLGS_DUMP_ALL);
 215
 216     OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CRYPTO_STRINGS, NULL);
 217     ERR_get_state();
 218     CRYPTO_free_ex_index(0, -1);
 219     RAND_add("", 1, ENTROPY_NEEDED);
 220     RAND_status();
 221
 222 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
 223     rand_predictable = 1;
 224 #endif
 225
 226     return 1;
 227 }
 228
 229 int FuzzerTestOneInput(const uint8_t *buf, size_t len)
 230 {
 231     int n;
 232
 233
 234     for (n = 0; item_type[n] != NULL; ++n) {
 235         const uint8_t *b = buf;
 236         unsigned char *der = NULL;
 237         const ASN1_ITEM *i = ASN1_ITEM_ptr(item_type[n]);
 238         ASN1_VALUE *o = ASN1_item_d2i(NULL, &b, len, i);
 239
 240         if (o != NULL) {
 241             BIO *bio = BIO_new(BIO_s_null());
 242             ASN1_item_print(bio, o, 4, i, pctx);
 243             BIO_free(bio);
 244
 245             ASN1_item_i2d(o, &der, i);
 246             OPENSSL_free(der);
 247
 248             ASN1_item_free(o, i);
 249         }
 250     }
 251
 252     ERR_clear_error();
 253
 254     return 0;
 255 }
 256
 257 void FuzzerCleanup(void)
 258 {
 259     ASN1_PCTX_free(pctx);
 260 }