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 #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/ess.h>
  31 #include <openssl/err.h>
  32 #include <openssl/rand.h>
  33 #include <openssl/bio.h>
  34 #include <openssl/evp.h>
  35 #include <openssl/ssl.h>
  36 #include <internal/nelem.h>
  37 #include "fuzzer.h"
  38
  39 #include "rand.inc"
  40
  41 static ASN1_ITEM_EXP *item_type[] = {
  42     ASN1_ITEM_ref(ACCESS_DESCRIPTION),
  43 #ifndef OPENSSL_NO_RFC3779
  44     ASN1_ITEM_ref(ASIdentifierChoice),
  45     ASN1_ITEM_ref(ASIdentifiers),
  46     ASN1_ITEM_ref(ASIdOrRange),
  47 #endif
  48     ASN1_ITEM_ref(ASN1_ANY),
  49     ASN1_ITEM_ref(ASN1_BIT_STRING),
  50     ASN1_ITEM_ref(ASN1_BMPSTRING),
  51     ASN1_ITEM_ref(ASN1_BOOLEAN),
  52     ASN1_ITEM_ref(ASN1_ENUMERATED),
  53     ASN1_ITEM_ref(ASN1_FBOOLEAN),
  54     ASN1_ITEM_ref(ASN1_GENERALIZEDTIME),
  55     ASN1_ITEM_ref(ASN1_GENERALSTRING),
  56     ASN1_ITEM_ref(ASN1_IA5STRING),
  57     ASN1_ITEM_ref(ASN1_INTEGER),
  58     ASN1_ITEM_ref(ASN1_NULL),
  59     ASN1_ITEM_ref(ASN1_OBJECT),
  60     ASN1_ITEM_ref(ASN1_OCTET_STRING),
  61     ASN1_ITEM_ref(ASN1_OCTET_STRING_NDEF),
  62     ASN1_ITEM_ref(ASN1_PRINTABLE),
  63     ASN1_ITEM_ref(ASN1_PRINTABLESTRING),
  64     ASN1_ITEM_ref(ASN1_SEQUENCE),
  65     ASN1_ITEM_ref(ASN1_SEQUENCE_ANY),
  66     ASN1_ITEM_ref(ASN1_SET_ANY),
  67     ASN1_ITEM_ref(ASN1_T61STRING),
  68     ASN1_ITEM_ref(ASN1_TBOOLEAN),
  69     ASN1_ITEM_ref(ASN1_TIME),
  70     ASN1_ITEM_ref(ASN1_UNIVERSALSTRING),
  71     ASN1_ITEM_ref(ASN1_UTCTIME),
  72     ASN1_ITEM_ref(ASN1_UTF8STRING),
  73     ASN1_ITEM_ref(ASN1_VISIBLESTRING),
  74 #ifndef OPENSSL_NO_RFC3779
  75     ASN1_ITEM_ref(ASRange),
  76 #endif
  77     ASN1_ITEM_ref(AUTHORITY_INFO_ACCESS),
  78     ASN1_ITEM_ref(AUTHORITY_KEYID),
  79     ASN1_ITEM_ref(BASIC_CONSTRAINTS),
  80     ASN1_ITEM_ref(BIGNUM),
  81     ASN1_ITEM_ref(CBIGNUM),
  82     ASN1_ITEM_ref(CERTIFICATEPOLICIES),
  83 #ifndef OPENSSL_NO_CMS
  84     ASN1_ITEM_ref(CMS_ContentInfo),
  85     ASN1_ITEM_ref(CMS_ReceiptRequest),
  86     ASN1_ITEM_ref(CRL_DIST_POINTS),
  87 #endif
  88 #ifndef OPENSSL_NO_DH
  89     ASN1_ITEM_ref(DHparams),
  90 #endif
  91     ASN1_ITEM_ref(DIRECTORYSTRING),
  92     ASN1_ITEM_ref(DISPLAYTEXT),
  93     ASN1_ITEM_ref(DIST_POINT),
  94     ASN1_ITEM_ref(DIST_POINT_NAME),
  95 #ifndef OPENSSL_NO_EC
  96     ASN1_ITEM_ref(ECPARAMETERS),
  97     ASN1_ITEM_ref(ECPKPARAMETERS),
  98 #endif
  99     ASN1_ITEM_ref(EDIPARTYNAME),
 100     ASN1_ITEM_ref(EXTENDED_KEY_USAGE),
 101     ASN1_ITEM_ref(GENERAL_NAME),
 102     ASN1_ITEM_ref(GENERAL_NAMES),
 103     ASN1_ITEM_ref(GENERAL_SUBTREE),
 104 #ifndef OPENSSL_NO_RFC3779
 105     ASN1_ITEM_ref(IPAddressChoice),
 106     ASN1_ITEM_ref(IPAddressFamily),
 107     ASN1_ITEM_ref(IPAddressOrRange),
 108     ASN1_ITEM_ref(IPAddressRange),
 109 #endif
 110     ASN1_ITEM_ref(ISSUING_DIST_POINT),
 111 #if !OPENSSL_API_3
 112     ASN1_ITEM_ref(LONG),
 113 #endif
 114     ASN1_ITEM_ref(NAME_CONSTRAINTS),
 115     ASN1_ITEM_ref(NETSCAPE_CERT_SEQUENCE),
 116     ASN1_ITEM_ref(NETSCAPE_SPKAC),
 117     ASN1_ITEM_ref(NETSCAPE_SPKI),
 118     ASN1_ITEM_ref(NOTICEREF),
 119 #ifndef OPENSSL_NO_OCSP
 120     ASN1_ITEM_ref(OCSP_BASICRESP),
 121     ASN1_ITEM_ref(OCSP_CERTID),
 122     ASN1_ITEM_ref(OCSP_CERTSTATUS),
 123     ASN1_ITEM_ref(OCSP_CRLID),
 124     ASN1_ITEM_ref(OCSP_ONEREQ),
 125     ASN1_ITEM_ref(OCSP_REQINFO),
 126     ASN1_ITEM_ref(OCSP_REQUEST),
 127     ASN1_ITEM_ref(OCSP_RESPBYTES),
 128     ASN1_ITEM_ref(OCSP_RESPDATA),
 129     ASN1_ITEM_ref(OCSP_RESPID),
 130     ASN1_ITEM_ref(OCSP_RESPONSE),
 131     ASN1_ITEM_ref(OCSP_REVOKEDINFO),
 132     ASN1_ITEM_ref(OCSP_SERVICELOC),
 133     ASN1_ITEM_ref(OCSP_SIGNATURE),
 134     ASN1_ITEM_ref(OCSP_SINGLERESP),
 135 #endif
 136     ASN1_ITEM_ref(OTHERNAME),
 137     ASN1_ITEM_ref(PBE2PARAM),
 138     ASN1_ITEM_ref(PBEPARAM),
 139     ASN1_ITEM_ref(PBKDF2PARAM),
 140     ASN1_ITEM_ref(PKCS12),
 141     ASN1_ITEM_ref(PKCS12_AUTHSAFES),
 142     ASN1_ITEM_ref(PKCS12_BAGS),
 143     ASN1_ITEM_ref(PKCS12_MAC_DATA),
 144     ASN1_ITEM_ref(PKCS12_SAFEBAG),
 145     ASN1_ITEM_ref(PKCS12_SAFEBAGS),
 146     ASN1_ITEM_ref(PKCS7),
 147     ASN1_ITEM_ref(PKCS7_ATTR_SIGN),
 148     ASN1_ITEM_ref(PKCS7_ATTR_VERIFY),
 149     ASN1_ITEM_ref(PKCS7_DIGEST),
 150     ASN1_ITEM_ref(PKCS7_ENC_CONTENT),
 151     ASN1_ITEM_ref(PKCS7_ENCRYPT),
 152     ASN1_ITEM_ref(PKCS7_ENVELOPE),
 153     ASN1_ITEM_ref(PKCS7_ISSUER_AND_SERIAL),
 154     ASN1_ITEM_ref(PKCS7_RECIP_INFO),
 155     ASN1_ITEM_ref(PKCS7_SIGNED),
 156     ASN1_ITEM_ref(PKCS7_SIGN_ENVELOPE),
 157     ASN1_ITEM_ref(PKCS7_SIGNER_INFO),
 158     ASN1_ITEM_ref(PKCS8_PRIV_KEY_INFO),
 159     ASN1_ITEM_ref(PKEY_USAGE_PERIOD),
 160     ASN1_ITEM_ref(POLICY_CONSTRAINTS),
 161     ASN1_ITEM_ref(POLICYINFO),
 162     ASN1_ITEM_ref(POLICY_MAPPING),
 163     ASN1_ITEM_ref(POLICY_MAPPINGS),
 164     ASN1_ITEM_ref(POLICYQUALINFO),
 165     ASN1_ITEM_ref(PROXY_CERT_INFO_EXTENSION),
 166     ASN1_ITEM_ref(PROXY_POLICY),
 167     ASN1_ITEM_ref(RSA_OAEP_PARAMS),
 168     ASN1_ITEM_ref(RSAPrivateKey),
 169     ASN1_ITEM_ref(RSA_PSS_PARAMS),
 170     ASN1_ITEM_ref(RSAPublicKey),
 171     ASN1_ITEM_ref(SXNET),
 172     ASN1_ITEM_ref(SXNETID),
 173     ASN1_ITEM_ref(USERNOTICE),
 174     ASN1_ITEM_ref(X509),
 175     ASN1_ITEM_ref(X509_ALGOR),
 176     ASN1_ITEM_ref(X509_ALGORS),
 177     ASN1_ITEM_ref(X509_ATTRIBUTE),
 178     ASN1_ITEM_ref(X509_CERT_AUX),
 179     ASN1_ITEM_ref(X509_CINF),
 180     ASN1_ITEM_ref(X509_CRL),
 181     ASN1_ITEM_ref(X509_CRL_INFO),
 182     ASN1_ITEM_ref(X509_EXTENSION),
 183     ASN1_ITEM_ref(X509_EXTENSIONS),
 184     ASN1_ITEM_ref(X509_NAME),
 185     ASN1_ITEM_ref(X509_NAME_ENTRY),
 186     ASN1_ITEM_ref(X509_PUBKEY),
 187     ASN1_ITEM_ref(X509_REQ),
 188     ASN1_ITEM_ref(X509_REQ_INFO),
 189     ASN1_ITEM_ref(X509_REVOKED),
 190     ASN1_ITEM_ref(X509_SIG),
 191     ASN1_ITEM_ref(X509_VAL),
 192 #if !OPENSSL_API_3
 193     ASN1_ITEM_ref(ZLONG),
 194 #endif
 195     ASN1_ITEM_ref(INT32),
 196     ASN1_ITEM_ref(ZINT32),
 197     ASN1_ITEM_ref(UINT32),
 198     ASN1_ITEM_ref(ZUINT32),
 199     ASN1_ITEM_ref(INT64),
 200     ASN1_ITEM_ref(ZINT64),
 201     ASN1_ITEM_ref(UINT64),
 202     ASN1_ITEM_ref(ZUINT64),
 203     NULL
 204 };
 205
 206 static ASN1_PCTX *pctx;
 207
 208 #define DO_TEST(TYPE, D2I, I2D, PRINT) { \
 209     const unsigned char *p = buf; \
 210     unsigned char *der = NULL; \
 211     TYPE *type = D2I(NULL, &p, len); \
 212     \
 213     if (type != NULL) { \
 214         int len2; \
 215         BIO *bio = BIO_new(BIO_s_null()); \
 216         \
 217         PRINT(bio, type); \
 218         BIO_free(bio); \
 219         len2 = I2D(type, &der); \
 220         if (len2 != 0) {} \
 221         OPENSSL_free(der); \
 222         TYPE ## _free(type); \
 223     } \
 224 }
 225
 226 #define DO_TEST_PRINT_OFFSET(TYPE, D2I, I2D, PRINT) { \
 227     const unsigned char *p = buf; \
 228     unsigned char *der = NULL; \
 229     TYPE *type = D2I(NULL, &p, len); \
 230     \
 231     if (type != NULL) { \
 232         BIO *bio = BIO_new(BIO_s_null()); \
 233         \
 234         PRINT(bio, type, 0); \
 235         BIO_free(bio); \
 236         I2D(type, &der); \
 237         OPENSSL_free(der); \
 238         TYPE ## _free(type); \
 239     } \
 240 }
 241
 242 #define DO_TEST_PRINT_PCTX(TYPE, D2I, I2D, PRINT) { \
 243     const unsigned char *p = buf; \
 244     unsigned char *der = NULL; \
 245     TYPE *type = D2I(NULL, &p, len); \
 246     \
 247     if (type != NULL) { \
 248         BIO *bio = BIO_new(BIO_s_null()); \
 249         \
 250         PRINT(bio, type, 0, pctx); \
 251         BIO_free(bio); \
 252         I2D(type, &der); \
 253         OPENSSL_free(der); \
 254         TYPE ## _free(type); \
 255     } \
 256 }
 257
 258
 259 #define DO_TEST_NO_PRINT(TYPE, D2I, I2D) { \
 260     const unsigned char *p = buf; \
 261     unsigned char *der = NULL; \
 262     TYPE *type = D2I(NULL, &p, len); \
 263     \
 264     if (type != NULL) { \
 265         BIO *bio = BIO_new(BIO_s_null()); \
 266         \
 267         BIO_free(bio); \
 268         I2D(type, &der); \
 269         OPENSSL_free(der); \
 270         TYPE ## _free(type); \
 271     } \
 272 }
 273
 274
 275 int FuzzerInitialize(int *argc, char ***argv)
 276 {
 277     pctx = ASN1_PCTX_new();
 278     ASN1_PCTX_set_flags(pctx, ASN1_PCTX_FLAGS_SHOW_ABSENT |
 279         ASN1_PCTX_FLAGS_SHOW_SEQUENCE | ASN1_PCTX_FLAGS_SHOW_SSOF |
 280         ASN1_PCTX_FLAGS_SHOW_TYPE | ASN1_PCTX_FLAGS_SHOW_FIELD_STRUCT_NAME);
 281     ASN1_PCTX_set_str_flags(pctx, ASN1_STRFLGS_UTF8_CONVERT |
 282         ASN1_STRFLGS_SHOW_TYPE | ASN1_STRFLGS_DUMP_ALL);
 283
 284     OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CRYPTO_STRINGS, NULL);
 285     OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS, NULL);
 286     ERR_clear_error();
 287     CRYPTO_free_ex_index(0, -1);
 288     FuzzerSetRand();
 289
 290     return 1;
 291 }
 292
 293 int FuzzerTestOneInput(const uint8_t *buf, size_t len)
 294 {
 295     int n;
 296
 297
 298     for (n = 0; item_type[n] != NULL; ++n) {
 299         const uint8_t *b = buf;
 300         unsigned char *der = NULL;
 301         const ASN1_ITEM *i = ASN1_ITEM_ptr(item_type[n]);
 302         ASN1_VALUE *o = ASN1_item_d2i(NULL, &b, len, i);
 303
 304         if (o != NULL) {
 305             BIO *bio = BIO_new(BIO_s_null());
 306
 307             ASN1_item_print(bio, o, 4, i, pctx);
 308             BIO_free(bio);
 309             ASN1_item_i2d(o, &der, i);
 310             OPENSSL_free(der);
 311             ASN1_item_free(o, i);
 312         }
 313     }
 314
 315 #ifndef OPENSSL_NO_TS
 316     DO_TEST(TS_REQ, d2i_TS_REQ, i2d_TS_REQ, TS_REQ_print_bio);
 317     DO_TEST(TS_MSG_IMPRINT, d2i_TS_MSG_IMPRINT, i2d_TS_MSG_IMPRINT, TS_MSG_IMPRINT_print_bio);
 318     DO_TEST(TS_RESP, d2i_TS_RESP, i2d_TS_RESP, TS_RESP_print_bio);
 319     DO_TEST(TS_STATUS_INFO, d2i_TS_STATUS_INFO, i2d_TS_STATUS_INFO, TS_STATUS_INFO_print_bio);
 320     DO_TEST(TS_TST_INFO, d2i_TS_TST_INFO, i2d_TS_TST_INFO, TS_TST_INFO_print_bio);
 321     DO_TEST_NO_PRINT(TS_ACCURACY, d2i_TS_ACCURACY, i2d_TS_ACCURACY);
 322 #endif
 323     DO_TEST_NO_PRINT(ESS_ISSUER_SERIAL, d2i_ESS_ISSUER_SERIAL, i2d_ESS_ISSUER_SERIAL);
 324     DO_TEST_NO_PRINT(ESS_CERT_ID, d2i_ESS_CERT_ID, i2d_ESS_CERT_ID);
 325     DO_TEST_NO_PRINT(ESS_SIGNING_CERT, d2i_ESS_SIGNING_CERT, i2d_ESS_SIGNING_CERT);
 326     DO_TEST_NO_PRINT(ESS_CERT_ID_V2, d2i_ESS_CERT_ID_V2, i2d_ESS_CERT_ID_V2);
 327     DO_TEST_NO_PRINT(ESS_SIGNING_CERT_V2, d2i_ESS_SIGNING_CERT_V2, i2d_ESS_SIGNING_CERT_V2);
 328 #ifndef OPENSSL_NO_DH
 329     DO_TEST(DH, d2i_DHparams, i2d_DHparams, DHparams_print);
 330     DO_TEST(DH, d2i_DHxparams, i2d_DHxparams, DHparams_print);
 331 #endif
 332 #ifndef OPENSSL_NO_DSA
 333     DO_TEST_NO_PRINT(DSA_SIG, d2i_DSA_SIG, i2d_DSA_SIG);
 334     DO_TEST_PRINT_OFFSET(DSA, d2i_DSAPrivateKey, i2d_DSAPrivateKey, DSA_print);
 335     DO_TEST_PRINT_OFFSET(DSA, d2i_DSAPublicKey, i2d_DSAPublicKey, DSA_print);
 336     DO_TEST(DSA, d2i_DSAparams, i2d_DSAparams, DSAparams_print);
 337 #endif
 338     DO_TEST_PRINT_OFFSET(RSA, d2i_RSAPublicKey, i2d_RSAPublicKey, RSA_print);
 339 #ifndef OPENSSL_NO_EC
 340     DO_TEST_PRINT_OFFSET(EC_GROUP, d2i_ECPKParameters, i2d_ECPKParameters, ECPKParameters_print);
 341     DO_TEST_PRINT_OFFSET(EC_KEY, d2i_ECPrivateKey, i2d_ECPrivateKey, EC_KEY_print);
 342     DO_TEST(EC_KEY, d2i_ECParameters, i2d_ECParameters, ECParameters_print);
 343     DO_TEST_NO_PRINT(ECDSA_SIG, d2i_ECDSA_SIG, i2d_ECDSA_SIG);
 344 #endif
 345     DO_TEST_PRINT_PCTX(EVP_PKEY, d2i_AutoPrivateKey, i2d_PrivateKey, EVP_PKEY_print_private);
 346     DO_TEST(SSL_SESSION, d2i_SSL_SESSION, i2d_SSL_SESSION, SSL_SESSION_print);
 347
 348     ERR_clear_error();
 349
 350     return 0;
 351 }
 352
 353 void FuzzerCleanup(void)
 354 {
 355     ASN1_PCTX_free(pctx);
 356 }