fuzz/asn1.c

   1 /*
   2  * Copyright 2016-2024 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 static ASN1_ITEM_EXP *item_type[] = {
  44     ASN1_ITEM_ref(ACCESS_DESCRIPTION),
  45 #ifndef OPENSSL_NO_RFC3779
  46     ASN1_ITEM_ref(ASIdentifierChoice),
  47     ASN1_ITEM_ref(ASIdentifiers),
  48     ASN1_ITEM_ref(ASIdOrRange),
  49 #endif
  50     ASN1_ITEM_ref(ASN1_ANY),
  51     ASN1_ITEM_ref(ASN1_BIT_STRING),
  52     ASN1_ITEM_ref(ASN1_BMPSTRING),
  53     ASN1_ITEM_ref(ASN1_BOOLEAN),
  54     ASN1_ITEM_ref(ASN1_ENUMERATED),
  55     ASN1_ITEM_ref(ASN1_FBOOLEAN),
  56     ASN1_ITEM_ref(ASN1_GENERALIZEDTIME),
  57     ASN1_ITEM_ref(ASN1_GENERALSTRING),
  58     ASN1_ITEM_ref(ASN1_IA5STRING),
  59     ASN1_ITEM_ref(ASN1_INTEGER),
  60     ASN1_ITEM_ref(ASN1_NULL),
  61     ASN1_ITEM_ref(ASN1_OBJECT),
  62     ASN1_ITEM_ref(ASN1_OCTET_STRING),
  63     ASN1_ITEM_ref(ASN1_OCTET_STRING_NDEF),
  64     ASN1_ITEM_ref(ASN1_PRINTABLE),
  65     ASN1_ITEM_ref(ASN1_PRINTABLESTRING),
  66     ASN1_ITEM_ref(ASN1_SEQUENCE),
  67     ASN1_ITEM_ref(ASN1_SEQUENCE_ANY),
  68     ASN1_ITEM_ref(ASN1_SET_ANY),
  69     ASN1_ITEM_ref(ASN1_T61STRING),
  70     ASN1_ITEM_ref(ASN1_TBOOLEAN),
  71     ASN1_ITEM_ref(ASN1_TIME),
  72     ASN1_ITEM_ref(ASN1_UNIVERSALSTRING),
  73     ASN1_ITEM_ref(ASN1_UTCTIME),
  74     ASN1_ITEM_ref(ASN1_UTF8STRING),
  75     ASN1_ITEM_ref(ASN1_VISIBLESTRING),
  76 #ifndef OPENSSL_NO_RFC3779
  77     ASN1_ITEM_ref(ASRange),
  78 #endif
  79     ASN1_ITEM_ref(AUTHORITY_INFO_ACCESS),
  80     ASN1_ITEM_ref(AUTHORITY_KEYID),
  81     ASN1_ITEM_ref(BASIC_CONSTRAINTS),
  82     ASN1_ITEM_ref(BIGNUM),
  83     ASN1_ITEM_ref(CBIGNUM),
  84     ASN1_ITEM_ref(CERTIFICATEPOLICIES),
  85 #ifndef OPENSSL_NO_CMS
  86     ASN1_ITEM_ref(CMS_ContentInfo),
  87     ASN1_ITEM_ref(CMS_ReceiptRequest),
  88     ASN1_ITEM_ref(CRL_DIST_POINTS),
  89 #endif
  90 #ifndef OPENSSL_NO_DH
  91     ASN1_ITEM_ref(DHparams),
  92 #endif
  93     ASN1_ITEM_ref(DIRECTORYSTRING),
  94     ASN1_ITEM_ref(DISPLAYTEXT),
  95     ASN1_ITEM_ref(DIST_POINT),
  96     ASN1_ITEM_ref(DIST_POINT_NAME),
  97 #if !defined(OPENSSL_NO_EC) && !defined(OPENSSL_NO_DEPRECATED_3_0)
  98     ASN1_ITEM_ref(ECPARAMETERS),
  99     ASN1_ITEM_ref(ECPKPARAMETERS),
 100 #endif
 101     ASN1_ITEM_ref(EDIPARTYNAME),
 102     ASN1_ITEM_ref(EXTENDED_KEY_USAGE),
 103     ASN1_ITEM_ref(GENERAL_NAME),
 104     ASN1_ITEM_ref(GENERAL_NAMES),
 105     ASN1_ITEM_ref(GENERAL_SUBTREE),
 106 #ifndef OPENSSL_NO_RFC3779
 107     ASN1_ITEM_ref(IPAddressChoice),
 108     ASN1_ITEM_ref(IPAddressFamily),
 109     ASN1_ITEM_ref(IPAddressOrRange),
 110     ASN1_ITEM_ref(IPAddressRange),
 111 #endif
 112     ASN1_ITEM_ref(ISSUING_DIST_POINT),
 113 #ifndef OPENSSL_NO_DEPRECATED_3_0
 114     ASN1_ITEM_ref(LONG),
 115 #endif
 116     ASN1_ITEM_ref(NAME_CONSTRAINTS),
 117     ASN1_ITEM_ref(NETSCAPE_CERT_SEQUENCE),
 118     ASN1_ITEM_ref(NETSCAPE_SPKAC),
 119     ASN1_ITEM_ref(NETSCAPE_SPKI),
 120     ASN1_ITEM_ref(NOTICEREF),
 121 #ifndef OPENSSL_NO_OCSP
 122     ASN1_ITEM_ref(OCSP_BASICRESP),
 123     ASN1_ITEM_ref(OCSP_CERTID),
 124     ASN1_ITEM_ref(OCSP_CERTSTATUS),
 125     ASN1_ITEM_ref(OCSP_CRLID),
 126     ASN1_ITEM_ref(OCSP_ONEREQ),
 127     ASN1_ITEM_ref(OCSP_REQINFO),
 128     ASN1_ITEM_ref(OCSP_REQUEST),
 129     ASN1_ITEM_ref(OCSP_RESPBYTES),
 130     ASN1_ITEM_ref(OCSP_RESPDATA),
 131     ASN1_ITEM_ref(OCSP_RESPID),
 132     ASN1_ITEM_ref(OCSP_RESPONSE),
 133     ASN1_ITEM_ref(OCSP_REVOKEDINFO),
 134     ASN1_ITEM_ref(OCSP_SERVICELOC),
 135     ASN1_ITEM_ref(OCSP_SIGNATURE),
 136     ASN1_ITEM_ref(OCSP_SINGLERESP),
 137 #endif
 138     ASN1_ITEM_ref(OTHERNAME),
 139     ASN1_ITEM_ref(PBE2PARAM),
 140     ASN1_ITEM_ref(PBEPARAM),
 141     ASN1_ITEM_ref(PBKDF2PARAM),
 142     ASN1_ITEM_ref(PKCS12),
 143     ASN1_ITEM_ref(PKCS12_AUTHSAFES),
 144     ASN1_ITEM_ref(PKCS12_BAGS),
 145     ASN1_ITEM_ref(PKCS12_MAC_DATA),
 146     ASN1_ITEM_ref(PKCS12_SAFEBAG),
 147     ASN1_ITEM_ref(PKCS12_SAFEBAGS),
 148     ASN1_ITEM_ref(PKCS7),
 149     ASN1_ITEM_ref(PKCS7_ATTR_SIGN),
 150     ASN1_ITEM_ref(PKCS7_ATTR_VERIFY),
 151     ASN1_ITEM_ref(PKCS7_DIGEST),
 152     ASN1_ITEM_ref(PKCS7_ENC_CONTENT),
 153     ASN1_ITEM_ref(PKCS7_ENCRYPT),
 154     ASN1_ITEM_ref(PKCS7_ENVELOPE),
 155     ASN1_ITEM_ref(PKCS7_ISSUER_AND_SERIAL),
 156     ASN1_ITEM_ref(PKCS7_RECIP_INFO),
 157     ASN1_ITEM_ref(PKCS7_SIGNED),
 158     ASN1_ITEM_ref(PKCS7_SIGN_ENVELOPE),
 159     ASN1_ITEM_ref(PKCS7_SIGNER_INFO),
 160     ASN1_ITEM_ref(PKCS8_PRIV_KEY_INFO),
 161     ASN1_ITEM_ref(PKEY_USAGE_PERIOD),
 162     ASN1_ITEM_ref(POLICY_CONSTRAINTS),
 163     ASN1_ITEM_ref(POLICYINFO),
 164     ASN1_ITEM_ref(POLICY_MAPPING),
 165     ASN1_ITEM_ref(POLICY_MAPPINGS),
 166     ASN1_ITEM_ref(POLICYQUALINFO),
 167     ASN1_ITEM_ref(PROXY_CERT_INFO_EXTENSION),
 168     ASN1_ITEM_ref(PROXY_POLICY),
 169     ASN1_ITEM_ref(RSA_OAEP_PARAMS),
 170     ASN1_ITEM_ref(RSA_PSS_PARAMS),
 171 #ifndef OPENSSL_NO_DEPRECATED_3_0
 172     ASN1_ITEM_ref(RSAPrivateKey),
 173     ASN1_ITEM_ref(RSAPublicKey),
 174 #endif
 175     ASN1_ITEM_ref(SXNET),
 176     ASN1_ITEM_ref(SXNETID),
 177     ASN1_ITEM_ref(USERNOTICE),
 178     ASN1_ITEM_ref(X509),
 179     ASN1_ITEM_ref(X509_ALGOR),
 180     ASN1_ITEM_ref(X509_ALGORS),
 181     ASN1_ITEM_ref(X509_ATTRIBUTE),
 182     ASN1_ITEM_ref(X509_CERT_AUX),
 183     ASN1_ITEM_ref(X509_CINF),
 184     ASN1_ITEM_ref(X509_CRL),
 185     ASN1_ITEM_ref(X509_CRL_INFO),
 186     ASN1_ITEM_ref(X509_EXTENSION),
 187     ASN1_ITEM_ref(X509_EXTENSIONS),
 188     ASN1_ITEM_ref(X509_NAME),
 189     ASN1_ITEM_ref(X509_NAME_ENTRY),
 190     ASN1_ITEM_ref(X509_PUBKEY),
 191     ASN1_ITEM_ref(X509_REQ),
 192     ASN1_ITEM_ref(X509_REQ_INFO),
 193     ASN1_ITEM_ref(X509_REVOKED),
 194     ASN1_ITEM_ref(X509_SIG),
 195     ASN1_ITEM_ref(X509_VAL),
 196 #ifndef OPENSSL_NO_DEPRECATED_3_0
 197     ASN1_ITEM_ref(ZLONG),
 198 #endif
 199     ASN1_ITEM_ref(INT32),
 200     ASN1_ITEM_ref(ZINT32),
 201     ASN1_ITEM_ref(UINT32),
 202     ASN1_ITEM_ref(ZUINT32),
 203     ASN1_ITEM_ref(INT64),
 204     ASN1_ITEM_ref(ZINT64),
 205     ASN1_ITEM_ref(UINT64),
 206     ASN1_ITEM_ref(ZUINT64),
 207     NULL
 208 };
 209
 210 static ASN1_PCTX *pctx;
 211
 212 #define DO_TEST(TYPE, D2I, I2D, PRINT) { \
 213     const unsigned char *p = buf; \
 214     unsigned char *der = NULL; \
 215     TYPE *type = D2I(NULL, &p, len); \
 216     \
 217     if (type != NULL) { \
 218         int len2; \
 219         BIO *bio = BIO_new(BIO_s_null()); \
 220         \
 221         if (bio != NULL) { \
 222             PRINT(bio, type); \
 223             BIO_free(bio); \
 224         } \
 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         if (bio != NULL) { \
 241             PRINT(bio, type, 0); \
 242             BIO_free(bio); \
 243         } \
 244         I2D(type, &der); \
 245         OPENSSL_free(der); \
 246         TYPE ## _free(type); \
 247     } \
 248 }
 249
 250 #define DO_TEST_PRINT_PCTX(TYPE, D2I, I2D, PRINT) { \
 251     const unsigned char *p = buf; \
 252     unsigned char *der = NULL; \
 253     TYPE *type = D2I(NULL, &p, len); \
 254     \
 255     if (type != NULL) { \
 256         BIO *bio = BIO_new(BIO_s_null()); \
 257         \
 258         if (bio != NULL) { \
 259             PRINT(bio, type, 0, pctx); \
 260             BIO_free(bio); \
 261         } \
 262         I2D(type, &der); \
 263         OPENSSL_free(der); \
 264         TYPE ## _free(type); \
 265     } \
 266 }
 267
 268
 269 #define DO_TEST_NO_PRINT(TYPE, D2I, I2D) { \
 270     const unsigned char *p = buf; \
 271     unsigned char *der = NULL; \
 272     TYPE *type = D2I(NULL, &p, len); \
 273     \
 274     if (type != NULL) { \
 275         BIO *bio = BIO_new(BIO_s_null()); \
 276         \
 277         BIO_free(bio); \
 278         I2D(type, &der); \
 279         OPENSSL_free(der); \
 280         TYPE ## _free(type); \
 281     } \
 282 }
 283
 284
 285 int FuzzerInitialize(int *argc, char ***argv)
 286 {
 287     FuzzerSetRand();
 288     pctx = ASN1_PCTX_new();
 289     ASN1_PCTX_set_flags(pctx, ASN1_PCTX_FLAGS_SHOW_ABSENT |
 290         ASN1_PCTX_FLAGS_SHOW_SEQUENCE | ASN1_PCTX_FLAGS_SHOW_SSOF |
 291         ASN1_PCTX_FLAGS_SHOW_TYPE | ASN1_PCTX_FLAGS_SHOW_FIELD_STRUCT_NAME);
 292     ASN1_PCTX_set_str_flags(pctx, ASN1_STRFLGS_UTF8_CONVERT |
 293         ASN1_STRFLGS_SHOW_TYPE | ASN1_STRFLGS_DUMP_ALL);
 294
 295     OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CRYPTO_STRINGS, NULL);
 296     OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS, NULL);
 297     ERR_clear_error();
 298     CRYPTO_free_ex_index(0, -1);
 299
 300     return 1;
 301 }
 302
 303 int FuzzerTestOneInput(const uint8_t *buf, size_t len)
 304 {
 305     int n;
 306
 307
 308     for (n = 0; item_type[n] != NULL; ++n) {
 309         const uint8_t *b = buf;
 310         unsigned char *der = NULL;
 311         const ASN1_ITEM *i = ASN1_ITEM_ptr(item_type[n]);
 312         ASN1_VALUE *o = ASN1_item_d2i(NULL, &b, len, i);
 313
 314         if (o != NULL) {
 315             /*
 316              * Don't print excessively long output to prevent spurious fuzzer
 317              * timeouts.
 318              */
 319             if (b - buf < 10000) {
 320                 BIO *bio = BIO_new(BIO_s_null());
 321                 if (bio != NULL) {
 322                     ASN1_item_print(bio, o, 4, i, pctx);
 323                     BIO_free(bio);
 324                 }
 325             }
 326             if (ASN1_item_i2d(o, &der, i) > 0) {
 327                 OPENSSL_free(der);
 328             }
 329             ASN1_item_free(o, i);
 330         }
 331     }
 332
 333 #ifndef OPENSSL_NO_TS
 334     DO_TEST(TS_REQ, d2i_TS_REQ, i2d_TS_REQ, TS_REQ_print_bio);
 335     DO_TEST(TS_MSG_IMPRINT, d2i_TS_MSG_IMPRINT, i2d_TS_MSG_IMPRINT, TS_MSG_IMPRINT_print_bio);
 336     DO_TEST(TS_RESP, d2i_TS_RESP, i2d_TS_RESP, TS_RESP_print_bio);
 337     DO_TEST(TS_STATUS_INFO, d2i_TS_STATUS_INFO, i2d_TS_STATUS_INFO, TS_STATUS_INFO_print_bio);
 338     DO_TEST(TS_TST_INFO, d2i_TS_TST_INFO, i2d_TS_TST_INFO, TS_TST_INFO_print_bio);
 339     DO_TEST_NO_PRINT(TS_ACCURACY, d2i_TS_ACCURACY, i2d_TS_ACCURACY);
 340 #endif
 341     DO_TEST_NO_PRINT(ESS_ISSUER_SERIAL, d2i_ESS_ISSUER_SERIAL, i2d_ESS_ISSUER_SERIAL);
 342     DO_TEST_NO_PRINT(ESS_CERT_ID, d2i_ESS_CERT_ID, i2d_ESS_CERT_ID);
 343     DO_TEST_NO_PRINT(ESS_SIGNING_CERT, d2i_ESS_SIGNING_CERT, i2d_ESS_SIGNING_CERT);
 344     DO_TEST_NO_PRINT(ESS_CERT_ID_V2, d2i_ESS_CERT_ID_V2, i2d_ESS_CERT_ID_V2);
 345     DO_TEST_NO_PRINT(ESS_SIGNING_CERT_V2, d2i_ESS_SIGNING_CERT_V2, i2d_ESS_SIGNING_CERT_V2);
 346 #if !defined(OPENSSL_NO_DH) && !defined(OPENSSL_NO_DEPRECATED_3_0)
 347     DO_TEST_NO_PRINT(DH, d2i_DHparams, i2d_DHparams);
 348     DO_TEST_NO_PRINT(DH, d2i_DHxparams, i2d_DHxparams);
 349 #endif
 350 #ifndef OPENSSL_NO_DSA
 351     DO_TEST_NO_PRINT(DSA_SIG, d2i_DSA_SIG, i2d_DSA_SIG);
 352 # ifndef OPENSSL_NO_DEPRECATED_3_0
 353     DO_TEST_NO_PRINT(DSA, d2i_DSAPrivateKey, i2d_DSAPrivateKey);
 354     DO_TEST_NO_PRINT(DSA, d2i_DSAPublicKey, i2d_DSAPublicKey);
 355     DO_TEST_NO_PRINT(DSA, d2i_DSAparams, i2d_DSAparams);
 356 # endif
 357 #endif
 358 #ifndef OPENSSL_NO_DEPRECATED_3_0
 359     DO_TEST_NO_PRINT(RSA, d2i_RSAPublicKey, i2d_RSAPublicKey);
 360 #endif
 361 #ifndef OPENSSL_NO_EC
 362 # ifndef OPENSSL_NO_DEPRECATED_3_0
 363     DO_TEST_PRINT_OFFSET(EC_GROUP, d2i_ECPKParameters, i2d_ECPKParameters, ECPKParameters_print);
 364     DO_TEST_PRINT_OFFSET(EC_KEY, d2i_ECPrivateKey, i2d_ECPrivateKey, EC_KEY_print);
 365     DO_TEST(EC_KEY, d2i_ECParameters, i2d_ECParameters, ECParameters_print);
 366     DO_TEST_NO_PRINT(ECDSA_SIG, d2i_ECDSA_SIG, i2d_ECDSA_SIG);
 367 # endif
 368 #endif
 369     DO_TEST_PRINT_PCTX(EVP_PKEY, d2i_AutoPrivateKey, i2d_PrivateKey, EVP_PKEY_print_private);
 370     DO_TEST(SSL_SESSION, d2i_SSL_SESSION, i2d_SSL_SESSION, SSL_SESSION_print);
 371
 372     ERR_clear_error();
 373
 374     return 0;
 375 }
 376
 377 void FuzzerCleanup(void)
 378 {
 379     ASN1_PCTX_free(pctx);
 380     FuzzerClearRand();
 381 }