fuzz/asn1.c

   1 /*
   2  * Copyright 2016-2021 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/dsa.h>
  27 #include <openssl/ec.h>
  28 #include <openssl/ocsp.h>
  29 #include <openssl/pkcs12.h>
  30 #include <openssl/rsa.h>
  31 #include <openssl/ts.h>
  32 #include <openssl/x509v3.h>
  33 #include <openssl/cms.h>
  34 #include <openssl/ess.h>
  35 #include <openssl/err.h>
  36 #include <openssl/rand.h>
  37 #include <openssl/bio.h>
  38 #include <openssl/evp.h>
  39 #include <openssl/ssl.h>
  40 #include <internal/nelem.h>
  41 #include "fuzzer.h"
  42
  43 #include "rand.inc"
  44
  45 static ASN1_ITEM_EXP *item_type[] = {
  46     ASN1_ITEM_ref(ACCESS_DESCRIPTION),
  47 #ifndef OPENSSL_NO_RFC3779
  48     ASN1_ITEM_ref(ASIdentifierChoice),
  49     ASN1_ITEM_ref(ASIdentifiers),
  50     ASN1_ITEM_ref(ASIdOrRange),
  51 #endif
  52     ASN1_ITEM_ref(ASN1_ANY),
  53     ASN1_ITEM_ref(ASN1_BIT_STRING),
  54     ASN1_ITEM_ref(ASN1_BMPSTRING),
  55     ASN1_ITEM_ref(ASN1_BOOLEAN),
  56     ASN1_ITEM_ref(ASN1_ENUMERATED),
  57     ASN1_ITEM_ref(ASN1_FBOOLEAN),
  58     ASN1_ITEM_ref(ASN1_GENERALIZEDTIME),
  59     ASN1_ITEM_ref(ASN1_GENERALSTRING),
  60     ASN1_ITEM_ref(ASN1_IA5STRING),
  61     ASN1_ITEM_ref(ASN1_INTEGER),
  62     ASN1_ITEM_ref(ASN1_NULL),
  63     ASN1_ITEM_ref(ASN1_OBJECT),
  64     ASN1_ITEM_ref(ASN1_OCTET_STRING),
  65     ASN1_ITEM_ref(ASN1_OCTET_STRING_NDEF),
  66     ASN1_ITEM_ref(ASN1_PRINTABLE),
  67     ASN1_ITEM_ref(ASN1_PRINTABLESTRING),
  68     ASN1_ITEM_ref(ASN1_SEQUENCE),
  69     ASN1_ITEM_ref(ASN1_SEQUENCE_ANY),
  70     ASN1_ITEM_ref(ASN1_SET_ANY),
  71     ASN1_ITEM_ref(ASN1_T61STRING),
  72     ASN1_ITEM_ref(ASN1_TBOOLEAN),
  73     ASN1_ITEM_ref(ASN1_TIME),
  74     ASN1_ITEM_ref(ASN1_UNIVERSALSTRING),
  75     ASN1_ITEM_ref(ASN1_UTCTIME),
  76     ASN1_ITEM_ref(ASN1_UTF8STRING),
  77     ASN1_ITEM_ref(ASN1_VISIBLESTRING),
  78 #ifndef OPENSSL_NO_RFC3779
  79     ASN1_ITEM_ref(ASRange),
  80 #endif
  81     ASN1_ITEM_ref(AUTHORITY_INFO_ACCESS),
  82     ASN1_ITEM_ref(AUTHORITY_KEYID),
  83     ASN1_ITEM_ref(BASIC_CONSTRAINTS),
  84     ASN1_ITEM_ref(BIGNUM),
  85     ASN1_ITEM_ref(CBIGNUM),
  86     ASN1_ITEM_ref(CERTIFICATEPOLICIES),
  87 #ifndef OPENSSL_NO_CMS
  88     ASN1_ITEM_ref(CMS_ContentInfo),
  89     ASN1_ITEM_ref(CMS_ReceiptRequest),
  90     ASN1_ITEM_ref(CRL_DIST_POINTS),
  91 #endif
  92 #ifndef OPENSSL_NO_DH
  93     ASN1_ITEM_ref(DHparams),
  94 #endif
  95     ASN1_ITEM_ref(DIRECTORYSTRING),
  96     ASN1_ITEM_ref(DISPLAYTEXT),
  97     ASN1_ITEM_ref(DIST_POINT),
  98     ASN1_ITEM_ref(DIST_POINT_NAME),
  99 #if !defined(OPENSSL_NO_EC) && !defined(OPENSSL_NO_DEPRECATED_3_0)
 100     ASN1_ITEM_ref(ECPARAMETERS),
 101     ASN1_ITEM_ref(ECPKPARAMETERS),
 102 #endif
 103     ASN1_ITEM_ref(EDIPARTYNAME),
 104     ASN1_ITEM_ref(EXTENDED_KEY_USAGE),
 105     ASN1_ITEM_ref(GENERAL_NAME),
 106     ASN1_ITEM_ref(GENERAL_NAMES),
 107     ASN1_ITEM_ref(GENERAL_SUBTREE),
 108 #ifndef OPENSSL_NO_RFC3779
 109     ASN1_ITEM_ref(IPAddressChoice),
 110     ASN1_ITEM_ref(IPAddressFamily),
 111     ASN1_ITEM_ref(IPAddressOrRange),
 112     ASN1_ITEM_ref(IPAddressRange),
 113 #endif
 114     ASN1_ITEM_ref(ISSUING_DIST_POINT),
 115 #ifndef OPENSSL_NO_DEPRECATED_3_0
 116     ASN1_ITEM_ref(LONG),
 117 #endif
 118     ASN1_ITEM_ref(NAME_CONSTRAINTS),
 119     ASN1_ITEM_ref(NETSCAPE_CERT_SEQUENCE),
 120     ASN1_ITEM_ref(NETSCAPE_SPKAC),
 121     ASN1_ITEM_ref(NETSCAPE_SPKI),
 122     ASN1_ITEM_ref(NOTICEREF),
 123 #ifndef OPENSSL_NO_OCSP
 124     ASN1_ITEM_ref(OCSP_BASICRESP),
 125     ASN1_ITEM_ref(OCSP_CERTID),
 126     ASN1_ITEM_ref(OCSP_CERTSTATUS),
 127     ASN1_ITEM_ref(OCSP_CRLID),
 128     ASN1_ITEM_ref(OCSP_ONEREQ),
 129     ASN1_ITEM_ref(OCSP_REQINFO),
 130     ASN1_ITEM_ref(OCSP_REQUEST),
 131     ASN1_ITEM_ref(OCSP_RESPBYTES),
 132     ASN1_ITEM_ref(OCSP_RESPDATA),
 133     ASN1_ITEM_ref(OCSP_RESPID),
 134     ASN1_ITEM_ref(OCSP_RESPONSE),
 135     ASN1_ITEM_ref(OCSP_REVOKEDINFO),
 136     ASN1_ITEM_ref(OCSP_SERVICELOC),
 137     ASN1_ITEM_ref(OCSP_SIGNATURE),
 138     ASN1_ITEM_ref(OCSP_SINGLERESP),
 139 #endif
 140     ASN1_ITEM_ref(OTHERNAME),
 141     ASN1_ITEM_ref(PBE2PARAM),
 142     ASN1_ITEM_ref(PBEPARAM),
 143     ASN1_ITEM_ref(PBKDF2PARAM),
 144     ASN1_ITEM_ref(PKCS12),
 145     ASN1_ITEM_ref(PKCS12_AUTHSAFES),
 146     ASN1_ITEM_ref(PKCS12_BAGS),
 147     ASN1_ITEM_ref(PKCS12_MAC_DATA),
 148     ASN1_ITEM_ref(PKCS12_SAFEBAG),
 149     ASN1_ITEM_ref(PKCS12_SAFEBAGS),
 150     ASN1_ITEM_ref(PKCS7),
 151     ASN1_ITEM_ref(PKCS7_ATTR_SIGN),
 152     ASN1_ITEM_ref(PKCS7_ATTR_VERIFY),
 153     ASN1_ITEM_ref(PKCS7_DIGEST),
 154     ASN1_ITEM_ref(PKCS7_ENC_CONTENT),
 155     ASN1_ITEM_ref(PKCS7_ENCRYPT),
 156     ASN1_ITEM_ref(PKCS7_ENVELOPE),
 157     ASN1_ITEM_ref(PKCS7_ISSUER_AND_SERIAL),
 158     ASN1_ITEM_ref(PKCS7_RECIP_INFO),
 159     ASN1_ITEM_ref(PKCS7_SIGNED),
 160     ASN1_ITEM_ref(PKCS7_SIGN_ENVELOPE),
 161     ASN1_ITEM_ref(PKCS7_SIGNER_INFO),
 162     ASN1_ITEM_ref(PKCS8_PRIV_KEY_INFO),
 163     ASN1_ITEM_ref(PKEY_USAGE_PERIOD),
 164     ASN1_ITEM_ref(POLICY_CONSTRAINTS),
 165     ASN1_ITEM_ref(POLICYINFO),
 166     ASN1_ITEM_ref(POLICY_MAPPING),
 167     ASN1_ITEM_ref(POLICY_MAPPINGS),
 168     ASN1_ITEM_ref(POLICYQUALINFO),
 169     ASN1_ITEM_ref(PROXY_CERT_INFO_EXTENSION),
 170     ASN1_ITEM_ref(PROXY_POLICY),
 171     ASN1_ITEM_ref(RSA_OAEP_PARAMS),
 172     ASN1_ITEM_ref(RSA_PSS_PARAMS),
 173 #ifndef OPENSSL_NO_DEPRECATED_3_0
 174     ASN1_ITEM_ref(RSAPrivateKey),
 175     ASN1_ITEM_ref(RSAPublicKey),
 176 #endif
 177     ASN1_ITEM_ref(SXNET),
 178     ASN1_ITEM_ref(SXNETID),
 179     ASN1_ITEM_ref(USERNOTICE),
 180     ASN1_ITEM_ref(X509),
 181     ASN1_ITEM_ref(X509_ALGOR),
 182     ASN1_ITEM_ref(X509_ALGORS),
 183     ASN1_ITEM_ref(X509_ATTRIBUTE),
 184     ASN1_ITEM_ref(X509_CERT_AUX),
 185     ASN1_ITEM_ref(X509_CINF),
 186     ASN1_ITEM_ref(X509_CRL),
 187     ASN1_ITEM_ref(X509_CRL_INFO),
 188     ASN1_ITEM_ref(X509_EXTENSION),
 189     ASN1_ITEM_ref(X509_EXTENSIONS),
 190     ASN1_ITEM_ref(X509_NAME),
 191     ASN1_ITEM_ref(X509_NAME_ENTRY),
 192     ASN1_ITEM_ref(X509_PUBKEY),
 193     ASN1_ITEM_ref(X509_REQ),
 194     ASN1_ITEM_ref(X509_REQ_INFO),
 195     ASN1_ITEM_ref(X509_REVOKED),
 196     ASN1_ITEM_ref(X509_SIG),
 197     ASN1_ITEM_ref(X509_VAL),
 198 #ifndef OPENSSL_NO_DEPRECATED_3_0
 199     ASN1_ITEM_ref(ZLONG),
 200 #endif
 201     ASN1_ITEM_ref(INT32),
 202     ASN1_ITEM_ref(ZINT32),
 203     ASN1_ITEM_ref(UINT32),
 204     ASN1_ITEM_ref(ZUINT32),
 205     ASN1_ITEM_ref(INT64),
 206     ASN1_ITEM_ref(ZINT64),
 207     ASN1_ITEM_ref(UINT64),
 208     ASN1_ITEM_ref(ZUINT64),
 209     NULL
 210 };
 211
 212 static ASN1_PCTX *pctx;
 213
 214 #define DO_TEST(TYPE, D2I, I2D, PRINT) { \
 215     const unsigned char *p = buf; \
 216     unsigned char *der = NULL; \
 217     TYPE *type = D2I(NULL, &p, len); \
 218     \
 219     if (type != NULL) { \
 220         int len2; \
 221         BIO *bio = BIO_new(BIO_s_null()); \
 222         \
 223         PRINT(bio, type); \
 224         BIO_free(bio); \
 225         len2 = I2D(type, &der); \
 226         if (len2 != 0) {} \
 227         OPENSSL_free(der); \
 228         TYPE ## _free(type); \
 229     } \
 230 }
 231
 232 #define DO_TEST_PRINT_OFFSET(TYPE, D2I, I2D, PRINT) { \
 233     const unsigned char *p = buf; \
 234     unsigned char *der = NULL; \
 235     TYPE *type = D2I(NULL, &p, len); \
 236     \
 237     if (type != NULL) { \
 238         BIO *bio = BIO_new(BIO_s_null()); \
 239         \
 240         PRINT(bio, type, 0); \
 241         BIO_free(bio); \
 242         I2D(type, &der); \
 243         OPENSSL_free(der); \
 244         TYPE ## _free(type); \
 245     } \
 246 }
 247
 248 #define DO_TEST_PRINT_PCTX(TYPE, D2I, I2D, PRINT) { \
 249     const unsigned char *p = buf; \
 250     unsigned char *der = NULL; \
 251     TYPE *type = D2I(NULL, &p, len); \
 252     \
 253     if (type != NULL) { \
 254         BIO *bio = BIO_new(BIO_s_null()); \
 255         \
 256         PRINT(bio, type, 0, pctx); \
 257         BIO_free(bio); \
 258         I2D(type, &der); \
 259         OPENSSL_free(der); \
 260         TYPE ## _free(type); \
 261     } \
 262 }
 263
 264
 265 #define DO_TEST_NO_PRINT(TYPE, D2I, I2D) { \
 266     const unsigned char *p = buf; \
 267     unsigned char *der = NULL; \
 268     TYPE *type = D2I(NULL, &p, len); \
 269     \
 270     if (type != NULL) { \
 271         BIO *bio = BIO_new(BIO_s_null()); \
 272         \
 273         BIO_free(bio); \
 274         I2D(type, &der); \
 275         OPENSSL_free(der); \
 276         TYPE ## _free(type); \
 277     } \
 278 }
 279
 280
 281 int FuzzerInitialize(int *argc, char ***argv)
 282 {
 283     pctx = ASN1_PCTX_new();
 284     ASN1_PCTX_set_flags(pctx, ASN1_PCTX_FLAGS_SHOW_ABSENT |
 285         ASN1_PCTX_FLAGS_SHOW_SEQUENCE | ASN1_PCTX_FLAGS_SHOW_SSOF |
 286         ASN1_PCTX_FLAGS_SHOW_TYPE | ASN1_PCTX_FLAGS_SHOW_FIELD_STRUCT_NAME);
 287     ASN1_PCTX_set_str_flags(pctx, ASN1_STRFLGS_UTF8_CONVERT |
 288         ASN1_STRFLGS_SHOW_TYPE | ASN1_STRFLGS_DUMP_ALL);
 289
 290     OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CRYPTO_STRINGS, NULL);
 291     OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS, NULL);
 292     ERR_clear_error();
 293     CRYPTO_free_ex_index(0, -1);
 294     FuzzerSetRand();
 295
 296     return 1;
 297 }
 298
 299 int FuzzerTestOneInput(const uint8_t *buf, size_t len)
 300 {
 301     int n;
 302
 303
 304     for (n = 0; item_type[n] != NULL; ++n) {
 305         const uint8_t *b = buf;
 306         unsigned char *der = NULL;
 307         const ASN1_ITEM *i = ASN1_ITEM_ptr(item_type[n]);
 308         ASN1_VALUE *o = ASN1_item_d2i(NULL, &b, len, i);
 309
 310         if (o != NULL) {
 311             BIO *bio = BIO_new(BIO_s_null());
 312
 313             ASN1_item_print(bio, o, 4, i, pctx);
 314             BIO_free(bio);
 315             ASN1_item_i2d(o, &der, i);
 316             OPENSSL_free(der);
 317             ASN1_item_free(o, i);
 318         }
 319     }
 320
 321 #ifndef OPENSSL_NO_TS
 322     DO_TEST(TS_REQ, d2i_TS_REQ, i2d_TS_REQ, TS_REQ_print_bio);
 323     DO_TEST(TS_MSG_IMPRINT, d2i_TS_MSG_IMPRINT, i2d_TS_MSG_IMPRINT, TS_MSG_IMPRINT_print_bio);
 324     DO_TEST(TS_RESP, d2i_TS_RESP, i2d_TS_RESP, TS_RESP_print_bio);
 325     DO_TEST(TS_STATUS_INFO, d2i_TS_STATUS_INFO, i2d_TS_STATUS_INFO, TS_STATUS_INFO_print_bio);
 326     DO_TEST(TS_TST_INFO, d2i_TS_TST_INFO, i2d_TS_TST_INFO, TS_TST_INFO_print_bio);
 327     DO_TEST_NO_PRINT(TS_ACCURACY, d2i_TS_ACCURACY, i2d_TS_ACCURACY);
 328 #endif
 329     DO_TEST_NO_PRINT(ESS_ISSUER_SERIAL, d2i_ESS_ISSUER_SERIAL, i2d_ESS_ISSUER_SERIAL);
 330     DO_TEST_NO_PRINT(ESS_CERT_ID, d2i_ESS_CERT_ID, i2d_ESS_CERT_ID);
 331     DO_TEST_NO_PRINT(ESS_SIGNING_CERT, d2i_ESS_SIGNING_CERT, i2d_ESS_SIGNING_CERT);
 332     DO_TEST_NO_PRINT(ESS_CERT_ID_V2, d2i_ESS_CERT_ID_V2, i2d_ESS_CERT_ID_V2);
 333     DO_TEST_NO_PRINT(ESS_SIGNING_CERT_V2, d2i_ESS_SIGNING_CERT_V2, i2d_ESS_SIGNING_CERT_V2);
 334 #if !defined(OPENSSL_NO_DH) && !defined(OPENSSL_NO_DEPRECATED_3_0)
 335     DO_TEST_NO_PRINT(DH, d2i_DHparams, i2d_DHparams);
 336     DO_TEST_NO_PRINT(DH, d2i_DHxparams, i2d_DHxparams);
 337 #endif
 338 #ifndef OPENSSL_NO_DSA
 339     DO_TEST_NO_PRINT(DSA_SIG, d2i_DSA_SIG, i2d_DSA_SIG);
 340 # ifndef OPENSSL_NO_DEPRECATED_3_0
 341     DO_TEST_NO_PRINT(DSA, d2i_DSAPrivateKey, i2d_DSAPrivateKey);
 342     DO_TEST_NO_PRINT(DSA, d2i_DSAPublicKey, i2d_DSAPublicKey);
 343     DO_TEST_NO_PRINT(DSA, d2i_DSAparams, i2d_DSAparams);
 344 # endif
 345 #endif
 346 #ifndef OPENSSL_NO_DEPRECATED_3_0
 347     DO_TEST_NO_PRINT(RSA, d2i_RSAPublicKey, i2d_RSAPublicKey);
 348 #endif
 349 #ifndef OPENSSL_NO_EC
 350 # ifndef OPENSSL_NO_DEPRECATED_3_0
 351     DO_TEST_PRINT_OFFSET(EC_GROUP, d2i_ECPKParameters, i2d_ECPKParameters, ECPKParameters_print);
 352     DO_TEST_PRINT_OFFSET(EC_KEY, d2i_ECPrivateKey, i2d_ECPrivateKey, EC_KEY_print);
 353     DO_TEST(EC_KEY, d2i_ECParameters, i2d_ECParameters, ECParameters_print);
 354     DO_TEST_NO_PRINT(ECDSA_SIG, d2i_ECDSA_SIG, i2d_ECDSA_SIG);
 355 # endif
 356 #endif
 357     DO_TEST_PRINT_PCTX(EVP_PKEY, d2i_AutoPrivateKey, i2d_PrivateKey, EVP_PKEY_print_private);
 358     DO_TEST(SSL_SESSION, d2i_SSL_SESSION, i2d_SSL_SESSION, SSL_SESSION_print);
 359
 360     ERR_clear_error();
 361
 362     return 0;
 363 }
 364
 365 void FuzzerCleanup(void)
 366 {
 367     ASN1_PCTX_free(pctx);
 368 }