fuzz/asn1.c

   1 /*
   2  * Copyright 2016-2019 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (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 /* We need to use some deprecated APIs */
  19 #define OPENSSL_SUPPRESS_DEPRECATED
  20
  21 #include <stdio.h>
  22 #include <string.h>
  23 #include <openssl/asn1.h>
  24 #include <openssl/asn1t.h>
  25 #include <openssl/dh.h>
  26 #include <openssl/ec.h>
  27 #include <openssl/ocsp.h>
  28 #include <openssl/pkcs12.h>
  29 #include <openssl/rsa.h>
  30 #include <openssl/ts.h>
  31 #include <openssl/x509v3.h>
  32 #include <openssl/cms.h>
  33 #include <openssl/ess.h>
  34 #include <openssl/err.h>
  35 #include <openssl/rand.h>
  36 #include <openssl/bio.h>
  37 #include <openssl/evp.h>
  38 #include <openssl/ssl.h>
  39 #include <internal/nelem.h>
  40 #include "fuzzer.h"
  41
  42 #include "rand.inc"
  43
  44 static ASN1_ITEM_EXP *item_type[] = {
  45     ASN1_ITEM_ref(ACCESS_DESCRIPTION),
  46 #ifndef OPENSSL_NO_RFC3779
  47     ASN1_ITEM_ref(ASIdentifierChoice),
  48     ASN1_ITEM_ref(ASIdentifiers),
  49     ASN1_ITEM_ref(ASIdOrRange),
  50 #endif
  51     ASN1_ITEM_ref(ASN1_ANY),
  52     ASN1_ITEM_ref(ASN1_BIT_STRING),
  53     ASN1_ITEM_ref(ASN1_BMPSTRING),
  54     ASN1_ITEM_ref(ASN1_BOOLEAN),
  55     ASN1_ITEM_ref(ASN1_ENUMERATED),
  56     ASN1_ITEM_ref(ASN1_FBOOLEAN),
  57     ASN1_ITEM_ref(ASN1_GENERALIZEDTIME),
  58     ASN1_ITEM_ref(ASN1_GENERALSTRING),
  59     ASN1_ITEM_ref(ASN1_IA5STRING),
  60     ASN1_ITEM_ref(ASN1_INTEGER),
  61     ASN1_ITEM_ref(ASN1_NULL),
  62     ASN1_ITEM_ref(ASN1_OBJECT),
  63     ASN1_ITEM_ref(ASN1_OCTET_STRING),
  64     ASN1_ITEM_ref(ASN1_OCTET_STRING_NDEF),
  65     ASN1_ITEM_ref(ASN1_PRINTABLE),
  66     ASN1_ITEM_ref(ASN1_PRINTABLESTRING),
  67     ASN1_ITEM_ref(ASN1_SEQUENCE),
  68     ASN1_ITEM_ref(ASN1_SEQUENCE_ANY),
  69     ASN1_ITEM_ref(ASN1_SET_ANY),
  70     ASN1_ITEM_ref(ASN1_T61STRING),
  71     ASN1_ITEM_ref(ASN1_TBOOLEAN),
  72     ASN1_ITEM_ref(ASN1_TIME),
  73     ASN1_ITEM_ref(ASN1_UNIVERSALSTRING),
  74     ASN1_ITEM_ref(ASN1_UTCTIME),
  75     ASN1_ITEM_ref(ASN1_UTF8STRING),
  76     ASN1_ITEM_ref(ASN1_VISIBLESTRING),
  77 #ifndef OPENSSL_NO_RFC3779
  78     ASN1_ITEM_ref(ASRange),
  79 #endif
  80     ASN1_ITEM_ref(AUTHORITY_INFO_ACCESS),
  81     ASN1_ITEM_ref(AUTHORITY_KEYID),
  82     ASN1_ITEM_ref(BASIC_CONSTRAINTS),
  83     ASN1_ITEM_ref(BIGNUM),
  84     ASN1_ITEM_ref(CBIGNUM),
  85     ASN1_ITEM_ref(CERTIFICATEPOLICIES),
  86 #ifndef OPENSSL_NO_CMS
  87     ASN1_ITEM_ref(CMS_ContentInfo),
  88     ASN1_ITEM_ref(CMS_ReceiptRequest),
  89     ASN1_ITEM_ref(CRL_DIST_POINTS),
  90 #endif
  91 #ifndef OPENSSL_NO_DH
  92     ASN1_ITEM_ref(DHparams),
  93 #endif
  94     ASN1_ITEM_ref(DIRECTORYSTRING),
  95     ASN1_ITEM_ref(DISPLAYTEXT),
  96     ASN1_ITEM_ref(DIST_POINT),
  97     ASN1_ITEM_ref(DIST_POINT_NAME),
  98 #ifndef OPENSSL_NO_EC
  99     ASN1_ITEM_ref(ECPARAMETERS),
 100     ASN1_ITEM_ref(ECPKPARAMETERS),
 101 #endif
 102     ASN1_ITEM_ref(EDIPARTYNAME),
 103     ASN1_ITEM_ref(EXTENDED_KEY_USAGE),
 104     ASN1_ITEM_ref(GENERAL_NAME),
 105     ASN1_ITEM_ref(GENERAL_NAMES),
 106     ASN1_ITEM_ref(GENERAL_SUBTREE),
 107 #ifndef OPENSSL_NO_RFC3779
 108     ASN1_ITEM_ref(IPAddressChoice),
 109     ASN1_ITEM_ref(IPAddressFamily),
 110     ASN1_ITEM_ref(IPAddressOrRange),
 111     ASN1_ITEM_ref(IPAddressRange),
 112 #endif
 113     ASN1_ITEM_ref(ISSUING_DIST_POINT),
 114 #ifndef OPENSSL_NO_DEPRECATED_3_0
 115     ASN1_ITEM_ref(LONG),
 116 #endif
 117     ASN1_ITEM_ref(NAME_CONSTRAINTS),
 118     ASN1_ITEM_ref(NETSCAPE_CERT_SEQUENCE),
 119     ASN1_ITEM_ref(NETSCAPE_SPKAC),
 120     ASN1_ITEM_ref(NETSCAPE_SPKI),
 121     ASN1_ITEM_ref(NOTICEREF),
 122 #ifndef OPENSSL_NO_OCSP
 123     ASN1_ITEM_ref(OCSP_BASICRESP),
 124     ASN1_ITEM_ref(OCSP_CERTID),
 125     ASN1_ITEM_ref(OCSP_CERTSTATUS),
 126     ASN1_ITEM_ref(OCSP_CRLID),
 127     ASN1_ITEM_ref(OCSP_ONEREQ),
 128     ASN1_ITEM_ref(OCSP_REQINFO),
 129     ASN1_ITEM_ref(OCSP_REQUEST),
 130     ASN1_ITEM_ref(OCSP_RESPBYTES),
 131     ASN1_ITEM_ref(OCSP_RESPDATA),
 132     ASN1_ITEM_ref(OCSP_RESPID),
 133     ASN1_ITEM_ref(OCSP_RESPONSE),
 134     ASN1_ITEM_ref(OCSP_REVOKEDINFO),
 135     ASN1_ITEM_ref(OCSP_SERVICELOC),
 136     ASN1_ITEM_ref(OCSP_SIGNATURE),
 137     ASN1_ITEM_ref(OCSP_SINGLERESP),
 138 #endif
 139     ASN1_ITEM_ref(OTHERNAME),
 140     ASN1_ITEM_ref(PBE2PARAM),
 141     ASN1_ITEM_ref(PBEPARAM),
 142     ASN1_ITEM_ref(PBKDF2PARAM),
 143     ASN1_ITEM_ref(PKCS12),
 144     ASN1_ITEM_ref(PKCS12_AUTHSAFES),
 145     ASN1_ITEM_ref(PKCS12_BAGS),
 146     ASN1_ITEM_ref(PKCS12_MAC_DATA),
 147     ASN1_ITEM_ref(PKCS12_SAFEBAG),
 148     ASN1_ITEM_ref(PKCS12_SAFEBAGS),
 149     ASN1_ITEM_ref(PKCS7),
 150     ASN1_ITEM_ref(PKCS7_ATTR_SIGN),
 151     ASN1_ITEM_ref(PKCS7_ATTR_VERIFY),
 152     ASN1_ITEM_ref(PKCS7_DIGEST),
 153     ASN1_ITEM_ref(PKCS7_ENC_CONTENT),
 154     ASN1_ITEM_ref(PKCS7_ENCRYPT),
 155     ASN1_ITEM_ref(PKCS7_ENVELOPE),
 156     ASN1_ITEM_ref(PKCS7_ISSUER_AND_SERIAL),
 157     ASN1_ITEM_ref(PKCS7_RECIP_INFO),
 158     ASN1_ITEM_ref(PKCS7_SIGNED),
 159     ASN1_ITEM_ref(PKCS7_SIGN_ENVELOPE),
 160     ASN1_ITEM_ref(PKCS7_SIGNER_INFO),
 161     ASN1_ITEM_ref(PKCS8_PRIV_KEY_INFO),
 162     ASN1_ITEM_ref(PKEY_USAGE_PERIOD),
 163     ASN1_ITEM_ref(POLICY_CONSTRAINTS),
 164     ASN1_ITEM_ref(POLICYINFO),
 165     ASN1_ITEM_ref(POLICY_MAPPING),
 166     ASN1_ITEM_ref(POLICY_MAPPINGS),
 167     ASN1_ITEM_ref(POLICYQUALINFO),
 168     ASN1_ITEM_ref(PROXY_CERT_INFO_EXTENSION),
 169     ASN1_ITEM_ref(PROXY_POLICY),
 170     ASN1_ITEM_ref(RSA_OAEP_PARAMS),
 171     ASN1_ITEM_ref(RSAPrivateKey),
 172     ASN1_ITEM_ref(RSA_PSS_PARAMS),
 173     ASN1_ITEM_ref(RSAPublicKey),
 174     ASN1_ITEM_ref(SXNET),
 175     ASN1_ITEM_ref(SXNETID),
 176     ASN1_ITEM_ref(USERNOTICE),
 177     ASN1_ITEM_ref(X509),
 178     ASN1_ITEM_ref(X509_ALGOR),
 179     ASN1_ITEM_ref(X509_ALGORS),
 180     ASN1_ITEM_ref(X509_ATTRIBUTE),
 181     ASN1_ITEM_ref(X509_CERT_AUX),
 182     ASN1_ITEM_ref(X509_CINF),
 183     ASN1_ITEM_ref(X509_CRL),
 184     ASN1_ITEM_ref(X509_CRL_INFO),
 185     ASN1_ITEM_ref(X509_EXTENSION),
 186     ASN1_ITEM_ref(X509_EXTENSIONS),
 187     ASN1_ITEM_ref(X509_NAME),
 188     ASN1_ITEM_ref(X509_NAME_ENTRY),
 189     ASN1_ITEM_ref(X509_PUBKEY),
 190     ASN1_ITEM_ref(X509_REQ),
 191     ASN1_ITEM_ref(X509_REQ_INFO),
 192     ASN1_ITEM_ref(X509_REVOKED),
 193     ASN1_ITEM_ref(X509_SIG),
 194     ASN1_ITEM_ref(X509_VAL),
 195 #ifndef OPENSSL_NO_DEPRECATED_3_0
 196     ASN1_ITEM_ref(ZLONG),
 197 #endif
 198     ASN1_ITEM_ref(INT32),
 199     ASN1_ITEM_ref(ZINT32),
 200     ASN1_ITEM_ref(UINT32),
 201     ASN1_ITEM_ref(ZUINT32),
 202     ASN1_ITEM_ref(INT64),
 203     ASN1_ITEM_ref(ZINT64),
 204     ASN1_ITEM_ref(UINT64),
 205     ASN1_ITEM_ref(ZUINT64),
 206     NULL
 207 };
 208
 209 static ASN1_PCTX *pctx;
 210
 211 #define DO_TEST(TYPE, D2I, I2D, PRINT) { \
 212     const unsigned char *p = buf; \
 213     unsigned char *der = NULL; \
 214     TYPE *type = D2I(NULL, &p, len); \
 215     \
 216     if (type != NULL) { \
 217         int len2; \
 218         BIO *bio = BIO_new(BIO_s_null()); \
 219         \
 220         PRINT(bio, type); \
 221         BIO_free(bio); \
 222         len2 = I2D(type, &der); \
 223         if (len2 != 0) {} \
 224         OPENSSL_free(der); \
 225         TYPE ## _free(type); \
 226     } \
 227 }
 228
 229 #define DO_TEST_PRINT_OFFSET(TYPE, D2I, I2D, PRINT) { \
 230     const unsigned char *p = buf; \
 231     unsigned char *der = NULL; \
 232     TYPE *type = D2I(NULL, &p, len); \
 233     \
 234     if (type != NULL) { \
 235         BIO *bio = BIO_new(BIO_s_null()); \
 236         \
 237         PRINT(bio, type, 0); \
 238         BIO_free(bio); \
 239         I2D(type, &der); \
 240         OPENSSL_free(der); \
 241         TYPE ## _free(type); \
 242     } \
 243 }
 244
 245 #define DO_TEST_PRINT_PCTX(TYPE, D2I, I2D, PRINT) { \
 246     const unsigned char *p = buf; \
 247     unsigned char *der = NULL; \
 248     TYPE *type = D2I(NULL, &p, len); \
 249     \
 250     if (type != NULL) { \
 251         BIO *bio = BIO_new(BIO_s_null()); \
 252         \
 253         PRINT(bio, type, 0, pctx); \
 254         BIO_free(bio); \
 255         I2D(type, &der); \
 256         OPENSSL_free(der); \
 257         TYPE ## _free(type); \
 258     } \
 259 }
 260
 261
 262 #define DO_TEST_NO_PRINT(TYPE, D2I, I2D) { \
 263     const unsigned char *p = buf; \
 264     unsigned char *der = NULL; \
 265     TYPE *type = D2I(NULL, &p, len); \
 266     \
 267     if (type != NULL) { \
 268         BIO *bio = BIO_new(BIO_s_null()); \
 269         \
 270         BIO_free(bio); \
 271         I2D(type, &der); \
 272         OPENSSL_free(der); \
 273         TYPE ## _free(type); \
 274     } \
 275 }
 276
 277
 278 int FuzzerInitialize(int *argc, char ***argv)
 279 {
 280     pctx = ASN1_PCTX_new();
 281     ASN1_PCTX_set_flags(pctx, ASN1_PCTX_FLAGS_SHOW_ABSENT |
 282         ASN1_PCTX_FLAGS_SHOW_SEQUENCE | ASN1_PCTX_FLAGS_SHOW_SSOF |
 283         ASN1_PCTX_FLAGS_SHOW_TYPE | ASN1_PCTX_FLAGS_SHOW_FIELD_STRUCT_NAME);
 284     ASN1_PCTX_set_str_flags(pctx, ASN1_STRFLGS_UTF8_CONVERT |
 285         ASN1_STRFLGS_SHOW_TYPE | ASN1_STRFLGS_DUMP_ALL);
 286
 287     OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CRYPTO_STRINGS, NULL);
 288     OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS, NULL);
 289     ERR_clear_error();
 290     CRYPTO_free_ex_index(0, -1);
 291     FuzzerSetRand();
 292
 293     return 1;
 294 }
 295
 296 int FuzzerTestOneInput(const uint8_t *buf, size_t len)
 297 {
 298     int n;
 299
 300
 301     for (n = 0; item_type[n] != NULL; ++n) {
 302         const uint8_t *b = buf;
 303         unsigned char *der = NULL;
 304         const ASN1_ITEM *i = ASN1_ITEM_ptr(item_type[n]);
 305         ASN1_VALUE *o = ASN1_item_d2i(NULL, &b, len, i);
 306
 307         if (o != NULL) {
 308             BIO *bio = BIO_new(BIO_s_null());
 309
 310             ASN1_item_print(bio, o, 4, i, pctx);
 311             BIO_free(bio);
 312             ASN1_item_i2d(o, &der, i);
 313             OPENSSL_free(der);
 314             ASN1_item_free(o, i);
 315         }
 316     }
 317
 318 #ifndef OPENSSL_NO_TS
 319     DO_TEST(TS_REQ, d2i_TS_REQ, i2d_TS_REQ, TS_REQ_print_bio);
 320     DO_TEST(TS_MSG_IMPRINT, d2i_TS_MSG_IMPRINT, i2d_TS_MSG_IMPRINT, TS_MSG_IMPRINT_print_bio);
 321     DO_TEST(TS_RESP, d2i_TS_RESP, i2d_TS_RESP, TS_RESP_print_bio);
 322     DO_TEST(TS_STATUS_INFO, d2i_TS_STATUS_INFO, i2d_TS_STATUS_INFO, TS_STATUS_INFO_print_bio);
 323     DO_TEST(TS_TST_INFO, d2i_TS_TST_INFO, i2d_TS_TST_INFO, TS_TST_INFO_print_bio);
 324     DO_TEST_NO_PRINT(TS_ACCURACY, d2i_TS_ACCURACY, i2d_TS_ACCURACY);
 325 #endif
 326     DO_TEST_NO_PRINT(ESS_ISSUER_SERIAL, d2i_ESS_ISSUER_SERIAL, i2d_ESS_ISSUER_SERIAL);
 327     DO_TEST_NO_PRINT(ESS_CERT_ID, d2i_ESS_CERT_ID, i2d_ESS_CERT_ID);
 328     DO_TEST_NO_PRINT(ESS_SIGNING_CERT, d2i_ESS_SIGNING_CERT, i2d_ESS_SIGNING_CERT);
 329     DO_TEST_NO_PRINT(ESS_CERT_ID_V2, d2i_ESS_CERT_ID_V2, i2d_ESS_CERT_ID_V2);
 330     DO_TEST_NO_PRINT(ESS_SIGNING_CERT_V2, d2i_ESS_SIGNING_CERT_V2, i2d_ESS_SIGNING_CERT_V2);
 331 #ifndef OPENSSL_NO_DH
 332     DO_TEST(DH, d2i_DHparams, i2d_DHparams, DHparams_print);
 333     DO_TEST(DH, d2i_DHxparams, i2d_DHxparams, DHparams_print);
 334 #endif
 335 #ifndef OPENSSL_NO_DSA
 336     DO_TEST_NO_PRINT(DSA_SIG, d2i_DSA_SIG, i2d_DSA_SIG);
 337     DO_TEST_NO_PRINT(DSA, d2i_DSAPrivateKey, i2d_DSAPrivateKey);
 338     DO_TEST_NO_PRINT(DSA, d2i_DSAPublicKey, i2d_DSAPublicKey);
 339     DO_TEST_NO_PRINT(DSA, d2i_DSAparams, i2d_DSAparams);
 340 #endif
 341     DO_TEST_NO_PRINT(RSA, d2i_RSAPublicKey, i2d_RSAPublicKey);
 342 #ifndef OPENSSL_NO_EC
 343     DO_TEST_PRINT_OFFSET(EC_GROUP, d2i_ECPKParameters, i2d_ECPKParameters, ECPKParameters_print);
 344     DO_TEST_PRINT_OFFSET(EC_KEY, d2i_ECPrivateKey, i2d_ECPrivateKey, EC_KEY_print);
 345     DO_TEST(EC_KEY, d2i_ECParameters, i2d_ECParameters, ECParameters_print);
 346 # ifndef OPENSSL_NO_DEPRECATED_3_0
 347     DO_TEST_NO_PRINT(ECDSA_SIG, d2i_ECDSA_SIG, i2d_ECDSA_SIG);
 348 # endif
 349 #endif
 350     DO_TEST_PRINT_PCTX(EVP_PKEY, d2i_AutoPrivateKey, i2d_PrivateKey, EVP_PKEY_print_private);
 351     DO_TEST(SSL_SESSION, d2i_SSL_SESSION, i2d_SSL_SESSION, SSL_SESSION_print);
 352
 353     ERR_clear_error();
 354
 355     return 0;
 356 }
 357
 358 void FuzzerCleanup(void)
 359 {
 360     ASN1_PCTX_free(pctx);
 361 }