text: /*
   * Copyright 2016-2021 The OpenSSL Project Authors. All Rights Reserved.
   *
   * Licensed under the Apache License 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   * https://www.openssl.org/source/license.html
   * or in the file LICENSE in the source distribution.
   */
  
  /*
   * Fuzz ASN.1 parsing for various data structures. Specify which on the
   * command line:
   *
   * asn1 <data structure>
   */
  
  /* We need to use some deprecated APIs */
  #define OPENSSL_SUPPRESS_DEPRECATED
  
  #include <stdio.h>
  #include <string.h>
  #include <openssl/asn1.h>
  #include <openssl/asn1t.h>
  #include <openssl/dh.h>
  #include <openssl/dsa.h>
  #include <openssl/ec.h>
  #include <openssl/ocsp.h>
  #include <openssl/pkcs12.h>
  #include <openssl/rsa.h>
  #include <openssl/ts.h>
  #include <openssl/x509v3.h>
  #include <openssl/cms.h>
  #include <openssl/ess.h>
  #include <openssl/err.h>
  #include <openssl/rand.h>
  #include <openssl/bio.h>
  #include <openssl/evp.h>
  #include <openssl/ssl.h>
  #include <internal/nelem.h>
  #include "fuzzer.h"
  
  static ASN1_ITEM_EXP *item_type[] = {
      ASN1_ITEM_ref(ACCESS_DESCRIPTION),
  #ifndef OPENSSL_NO_RFC3779
      ASN1_ITEM_ref(ASIdentifierChoice),
      ASN1_ITEM_ref(ASIdentifiers),
      ASN1_ITEM_ref(ASIdOrRange),
  #endif
      ASN1_ITEM_ref(ASN1_ANY),
      ASN1_ITEM_ref(ASN1_BIT_STRING),
      ASN1_ITEM_ref(ASN1_BMPSTRING),
      ASN1_ITEM_ref(ASN1_BOOLEAN),
      ASN1_ITEM_ref(ASN1_ENUMERATED),
      ASN1_ITEM_ref(ASN1_FBOOLEAN),
      ASN1_ITEM_ref(ASN1_GENERALIZEDTIME),
      ASN1_ITEM_ref(ASN1_GENERALSTRING),
      ASN1_ITEM_ref(ASN1_IA5STRING),
      ASN1_ITEM_ref(ASN1_INTEGER),
      ASN1_ITEM_ref(ASN1_NULL),
      ASN1_ITEM_ref(ASN1_OBJECT),
      ASN1_ITEM_ref(ASN1_OCTET_STRING),
      ASN1_ITEM_ref(ASN1_OCTET_STRING_NDEF),
      ASN1_ITEM_ref(ASN1_PRINTABLE),
      ASN1_ITEM_ref(ASN1_PRINTABLESTRING),
      ASN1_ITEM_ref(ASN1_SEQUENCE),
      ASN1_ITEM_ref(ASN1_SEQUENCE_ANY),
      ASN1_ITEM_ref(ASN1_SET_ANY),
      ASN1_ITEM_ref(ASN1_T61STRING),
      ASN1_ITEM_ref(ASN1_TBOOLEAN),
      ASN1_ITEM_ref(ASN1_TIME),
      ASN1_ITEM_ref(ASN1_UNIVERSALSTRING),
      ASN1_ITEM_ref(ASN1_UTCTIME),
      ASN1_ITEM_ref(ASN1_UTF8STRING),
      ASN1_ITEM_ref(ASN1_VISIBLESTRING),
  #ifndef OPENSSL_NO_RFC3779
      ASN1_ITEM_ref(ASRange),
  #endif
      ASN1_ITEM_ref(AUTHORITY_INFO_ACCESS),
      ASN1_ITEM_ref(AUTHORITY_KEYID),
      ASN1_ITEM_ref(BASIC_CONSTRAINTS),
      ASN1_ITEM_ref(BIGNUM),
      ASN1_ITEM_ref(CBIGNUM),
      ASN1_ITEM_ref(CERTIFICATEPOLICIES),
  #ifndef OPENSSL_NO_CMS
      ASN1_ITEM_ref(CMS_ContentInfo),
      ASN1_ITEM_ref(CMS_ReceiptRequest),
      ASN1_ITEM_ref(CRL_DIST_POINTS),
  #endif
  #ifndef OPENSSL_NO_DH
      ASN1_ITEM_ref(DHparams),
  #endif
      ASN1_ITEM_ref(DIRECTORYSTRING),
      ASN1_ITEM_ref(DISPLAYTEXT),
      ASN1_ITEM_ref(DIST_POINT),
      ASN1_ITEM_ref(DIST_POINT_NAME),
  #if !defined(OPENSSL_NO_EC) && !defined(OPENSSL_NO_DEPRECATED_3_0)
      ASN1_ITEM_ref(ECPARAMETERS),
      ASN1_ITEM_ref(ECPKPARAMETERS),
  #endif
      ASN1_ITEM_ref(EDIPARTYNAME),
      ASN1_ITEM_ref(EXTENDED_KEY_USAGE),
      ASN1_ITEM_ref(GENERAL_NAME),
      ASN1_ITEM_ref(GENERAL_NAMES),
      ASN1_ITEM_ref(GENERAL_SUBTREE),
  #ifndef OPENSSL_NO_RFC3779
      ASN1_ITEM_ref(IPAddressChoice),
      ASN1_ITEM_ref(IPAddressFamily),
      ASN1_ITEM_ref(IPAddressOrRange),
      ASN1_ITEM_ref(IPAddressRange),
  #endif
      ASN1_ITEM_ref(ISSUING_DIST_POINT),
  #ifndef OPENSSL_NO_DEPRECATED_3_0
      ASN1_ITEM_ref(LONG),
  #endif
      ASN1_ITEM_ref(NAME_CONSTRAINTS),
      ASN1_ITEM_ref(NETSCAPE_CERT_SEQUENCE),
      ASN1_ITEM_ref(NETSCAPE_SPKAC),
      ASN1_ITEM_ref(NETSCAPE_SPKI),
      ASN1_ITEM_ref(NOTICEREF),
  #ifndef OPENSSL_NO_OCSP
      ASN1_ITEM_ref(OCSP_BASICRESP),
      ASN1_ITEM_ref(OCSP_CERTID),
      ASN1_ITEM_ref(OCSP_CERTSTATUS),
      ASN1_ITEM_ref(OCSP_CRLID),
      ASN1_ITEM_ref(OCSP_ONEREQ),
      ASN1_ITEM_ref(OCSP_REQINFO),
      ASN1_ITEM_ref(OCSP_REQUEST),
      ASN1_ITEM_ref(OCSP_RESPBYTES),
      ASN1_ITEM_ref(OCSP_RESPDATA),
      ASN1_ITEM_ref(OCSP_RESPID),
      ASN1_ITEM_ref(OCSP_RESPONSE),
      ASN1_ITEM_ref(OCSP_REVOKEDINFO),
      ASN1_ITEM_ref(OCSP_SERVICELOC),
      ASN1_ITEM_ref(OCSP_SIGNATURE),
      ASN1_ITEM_ref(OCSP_SINGLERESP),
  #endif
      ASN1_ITEM_ref(OTHERNAME),
      ASN1_ITEM_ref(PBE2PARAM),
      ASN1_ITEM_ref(PBEPARAM),
      ASN1_ITEM_ref(PBKDF2PARAM),
      ASN1_ITEM_ref(PKCS12),
      ASN1_ITEM_ref(PKCS12_AUTHSAFES),
      ASN1_ITEM_ref(PKCS12_BAGS),
      ASN1_ITEM_ref(PKCS12_MAC_DATA),
      ASN1_ITEM_ref(PKCS12_SAFEBAG),
      ASN1_ITEM_ref(PKCS12_SAFEBAGS),
      ASN1_ITEM_ref(PKCS7),
      ASN1_ITEM_ref(PKCS7_ATTR_SIGN),
      ASN1_ITEM_ref(PKCS7_ATTR_VERIFY),
      ASN1_ITEM_ref(PKCS7_DIGEST),
      ASN1_ITEM_ref(PKCS7_ENC_CONTENT),
      ASN1_ITEM_ref(PKCS7_ENCRYPT),
      ASN1_ITEM_ref(PKCS7_ENVELOPE),
      ASN1_ITEM_ref(PKCS7_ISSUER_AND_SERIAL),
      ASN1_ITEM_ref(PKCS7_RECIP_INFO),
      ASN1_ITEM_ref(PKCS7_SIGNED),
      ASN1_ITEM_ref(PKCS7_SIGN_ENVELOPE),
      ASN1_ITEM_ref(PKCS7_SIGNER_INFO),
      ASN1_ITEM_ref(PKCS8_PRIV_KEY_INFO),
      ASN1_ITEM_ref(PKEY_USAGE_PERIOD),
      ASN1_ITEM_ref(POLICY_CONSTRAINTS),
      ASN1_ITEM_ref(POLICYINFO),
      ASN1_ITEM_ref(POLICY_MAPPING),
      ASN1_ITEM_ref(POLICY_MAPPINGS),
      ASN1_ITEM_ref(POLICYQUALINFO),
      ASN1_ITEM_ref(PROXY_CERT_INFO_EXTENSION),
      ASN1_ITEM_ref(PROXY_POLICY),
      ASN1_ITEM_ref(RSA_OAEP_PARAMS),
      ASN1_ITEM_ref(RSA_PSS_PARAMS),
  #ifndef OPENSSL_NO_DEPRECATED_3_0
      ASN1_ITEM_ref(RSAPrivateKey),
      ASN1_ITEM_ref(RSAPublicKey),
  #endif
      ASN1_ITEM_ref(SXNET),
      ASN1_ITEM_ref(SXNETID),
      ASN1_ITEM_ref(USERNOTICE),
      ASN1_ITEM_ref(X509),
      ASN1_ITEM_ref(X509_ALGOR),
      ASN1_ITEM_ref(X509_ALGORS),
      ASN1_ITEM_ref(X509_ATTRIBUTE),
      ASN1_ITEM_ref(X509_CERT_AUX),
      ASN1_ITEM_ref(X509_CINF),
      ASN1_ITEM_ref(X509_CRL),
      ASN1_ITEM_ref(X509_CRL_INFO),
      ASN1_ITEM_ref(X509_EXTENSION),
      ASN1_ITEM_ref(X509_EXTENSIONS),
      ASN1_ITEM_ref(X509_NAME),
      ASN1_ITEM_ref(X509_NAME_ENTRY),
      ASN1_ITEM_ref(X509_PUBKEY),
      ASN1_ITEM_ref(X509_REQ),
      ASN1_ITEM_ref(X509_REQ_INFO),
      ASN1_ITEM_ref(X509_REVOKED),
      ASN1_ITEM_ref(X509_SIG),
      ASN1_ITEM_ref(X509_VAL),
  #ifndef OPENSSL_NO_DEPRECATED_3_0
      ASN1_ITEM_ref(ZLONG),
  #endif
      ASN1_ITEM_ref(INT32),
      ASN1_ITEM_ref(ZINT32),
      ASN1_ITEM_ref(UINT32),
      ASN1_ITEM_ref(ZUINT32),
      ASN1_ITEM_ref(INT64),
      ASN1_ITEM_ref(ZINT64),
      ASN1_ITEM_ref(UINT64),
      ASN1_ITEM_ref(ZUINT64),
      NULL
  };
  
  static ASN1_PCTX *pctx;
  
  #define DO_TEST(TYPE, D2I, I2D, PRINT) { \
      const unsigned char *p = buf; \
      unsigned char *der = NULL; \
      TYPE *type = D2I(NULL, &p, len); \
      \
      if (type != NULL) { \
          int len2; \
          BIO *bio = BIO_new(BIO_s_null()); \
          \
          PRINT(bio, type); \
          BIO_free(bio); \
          len2 = I2D(type, &der); \
          if (len2 != 0) {} \
          OPENSSL_free(der); \
          TYPE ## _free(type); \
      } \
  }
  
  #define DO_TEST_PRINT_OFFSET(TYPE, D2I, I2D, PRINT) { \
      const unsigned char *p = buf; \
      unsigned char *der = NULL; \
      TYPE *type = D2I(NULL, &p, len); \
      \
      if (type != NULL) { \
          BIO *bio = BIO_new(BIO_s_null()); \
          \
          PRINT(bio, type, 0); \
          BIO_free(bio); \
          I2D(type, &der); \
          OPENSSL_free(der); \
          TYPE ## _free(type); \
      } \
  }
  
  #define DO_TEST_PRINT_PCTX(TYPE, D2I, I2D, PRINT) { \
      const unsigned char *p = buf; \
      unsigned char *der = NULL; \
      TYPE *type = D2I(NULL, &p, len); \
      \
      if (type != NULL) { \
          BIO *bio = BIO_new(BIO_s_null()); \
          \
          PRINT(bio, type, 0, pctx); \
          BIO_free(bio); \
          I2D(type, &der); \
          OPENSSL_free(der); \
          TYPE ## _free(type); \
      } \
  }
  
  
  #define DO_TEST_NO_PRINT(TYPE, D2I, I2D) { \
      const unsigned char *p = buf; \
      unsigned char *der = NULL; \
      TYPE *type = D2I(NULL, &p, len); \
      \
      if (type != NULL) { \
          BIO *bio = BIO_new(BIO_s_null()); \
          \
          BIO_free(bio); \
          I2D(type, &der); \
          OPENSSL_free(der); \
          TYPE ## _free(type); \
      } \
  }
  
  
  int FuzzerInitialize(int *argc, char ***argv)
  {
      FuzzerSetRand();
      pctx = ASN1_PCTX_new();
      ASN1_PCTX_set_flags(pctx, ASN1_PCTX_FLAGS_SHOW_ABSENT |
          ASN1_PCTX_FLAGS_SHOW_SEQUENCE | ASN1_PCTX_FLAGS_SHOW_SSOF |
          ASN1_PCTX_FLAGS_SHOW_TYPE | ASN1_PCTX_FLAGS_SHOW_FIELD_STRUCT_NAME);
      ASN1_PCTX_set_str_flags(pctx, ASN1_STRFLGS_UTF8_CONVERT |
          ASN1_STRFLGS_SHOW_TYPE | ASN1_STRFLGS_DUMP_ALL);
  
      OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CRYPTO_STRINGS, NULL);
      OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS, NULL);
      ERR_clear_error();
      CRYPTO_free_ex_index(0, -1);
  
      return 1;
  }
  
  int FuzzerTestOneInput(const uint8_t *buf, size_t len)
  {
      int n;
  
  
      for (n = 0; item_type[n] != NULL; ++n) {
          const uint8_t *b = buf;
          unsigned char *der = NULL;
          const ASN1_ITEM *i = ASN1_ITEM_ptr(item_type[n]);
          ASN1_VALUE *o = ASN1_item_d2i(NULL, &b, len, i);
  
          if (o != NULL) {
              BIO *bio = BIO_new(BIO_s_null());
  
              ASN1_item_print(bio, o, 4, i, pctx);
              BIO_free(bio);
              ASN1_item_i2d(o, &der, i);
              OPENSSL_free(der);
              ASN1_item_free(o, i);
          }
      }
  
  #ifndef OPENSSL_NO_TS
      DO_TEST(TS_REQ, d2i_TS_REQ, i2d_TS_REQ, TS_REQ_print_bio);
      DO_TEST(TS_MSG_IMPRINT, d2i_TS_MSG_IMPRINT, i2d_TS_MSG_IMPRINT, TS_MSG_IMPRINT_print_bio);
      DO_TEST(TS_RESP, d2i_TS_RESP, i2d_TS_RESP, TS_RESP_print_bio);
      DO_TEST(TS_STATUS_INFO, d2i_TS_STATUS_INFO, i2d_TS_STATUS_INFO, TS_STATUS_INFO_print_bio);
      DO_TEST(TS_TST_INFO, d2i_TS_TST_INFO, i2d_TS_TST_INFO, TS_TST_INFO_print_bio);
      DO_TEST_NO_PRINT(TS_ACCURACY, d2i_TS_ACCURACY, i2d_TS_ACCURACY);
  #endif
      DO_TEST_NO_PRINT(ESS_ISSUER_SERIAL, d2i_ESS_ISSUER_SERIAL, i2d_ESS_ISSUER_SERIAL);
      DO_TEST_NO_PRINT(ESS_CERT_ID, d2i_ESS_CERT_ID, i2d_ESS_CERT_ID);
      DO_TEST_NO_PRINT(ESS_SIGNING_CERT, d2i_ESS_SIGNING_CERT, i2d_ESS_SIGNING_CERT);
      DO_TEST_NO_PRINT(ESS_CERT_ID_V2, d2i_ESS_CERT_ID_V2, i2d_ESS_CERT_ID_V2);
      DO_TEST_NO_PRINT(ESS_SIGNING_CERT_V2, d2i_ESS_SIGNING_CERT_V2, i2d_ESS_SIGNING_CERT_V2);
  #if !defined(OPENSSL_NO_DH) && !defined(OPENSSL_NO_DEPRECATED_3_0)
      DO_TEST_NO_PRINT(DH, d2i_DHparams, i2d_DHparams);
      DO_TEST_NO_PRINT(DH, d2i_DHxparams, i2d_DHxparams);
  #endif
  #ifndef OPENSSL_NO_DSA
      DO_TEST_NO_PRINT(DSA_SIG, d2i_DSA_SIG, i2d_DSA_SIG);
  # ifndef OPENSSL_NO_DEPRECATED_3_0
      DO_TEST_NO_PRINT(DSA, d2i_DSAPrivateKey, i2d_DSAPrivateKey);
      DO_TEST_NO_PRINT(DSA, d2i_DSAPublicKey, i2d_DSAPublicKey);
      DO_TEST_NO_PRINT(DSA, d2i_DSAparams, i2d_DSAparams);
  # endif
  #endif
  #ifndef OPENSSL_NO_DEPRECATED_3_0
      DO_TEST_NO_PRINT(RSA, d2i_RSAPublicKey, i2d_RSAPublicKey);
  #endif
  #ifndef OPENSSL_NO_EC
  # ifndef OPENSSL_NO_DEPRECATED_3_0
      DO_TEST_PRINT_OFFSET(EC_GROUP, d2i_ECPKParameters, i2d_ECPKParameters, ECPKParameters_print);
      DO_TEST_PRINT_OFFSET(EC_KEY, d2i_ECPrivateKey, i2d_ECPrivateKey, EC_KEY_print);
      DO_TEST(EC_KEY, d2i_ECParameters, i2d_ECParameters, ECParameters_print);
      DO_TEST_NO_PRINT(ECDSA_SIG, d2i_ECDSA_SIG, i2d_ECDSA_SIG);
  # endif
  #endif
      DO_TEST_PRINT_PCTX(EVP_PKEY, d2i_AutoPrivateKey, i2d_PrivateKey, EVP_PKEY_print_private);
      DO_TEST(SSL_SESSION, d2i_SSL_SESSION, i2d_SSL_SESSION, SSL_SESSION_print);
  
      ERR_clear_error();
  
      return 0;
  }
  
  void FuzzerCleanup(void)
  {
      ASN1_PCTX_free(pctx);
      FuzzerClearRand();
  }
  