1/* 2 * Copyright 2016-2020 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the OpenSSL licenses, (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/dsa.h> 24#include <openssl/ec.h> 25#include <openssl/ocsp.h> 26#include <openssl/pkcs12.h> 27#include <openssl/rsa.h> 28#include <openssl/ts.h> 29#include <openssl/x509v3.h> 30#include <openssl/cms.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 "fuzzer.h" 37 38#include "rand.inc" 39 40static ASN1_ITEM_EXP *item_type[] = { 41 ASN1_ITEM_ref(ACCESS_DESCRIPTION), 42#ifndef OPENSSL_NO_RFC3779 43 ASN1_ITEM_ref(ASIdentifierChoice), 44 ASN1_ITEM_ref(ASIdentifiers), 45 ASN1_ITEM_ref(ASIdOrRange), 46#endif 47 ASN1_ITEM_ref(ASN1_ANY), 48 ASN1_ITEM_ref(ASN1_BIT_STRING), 49 ASN1_ITEM_ref(ASN1_BMPSTRING), 50 ASN1_ITEM_ref(ASN1_BOOLEAN), 51 ASN1_ITEM_ref(ASN1_ENUMERATED), 52 ASN1_ITEM_ref(ASN1_FBOOLEAN), 53 ASN1_ITEM_ref(ASN1_GENERALIZEDTIME), 54 ASN1_ITEM_ref(ASN1_GENERALSTRING), 55 ASN1_ITEM_ref(ASN1_IA5STRING), 56 ASN1_ITEM_ref(ASN1_INTEGER), 57 ASN1_ITEM_ref(ASN1_NULL), 58 ASN1_ITEM_ref(ASN1_OBJECT), 59 ASN1_ITEM_ref(ASN1_OCTET_STRING), 60 ASN1_ITEM_ref(ASN1_OCTET_STRING_NDEF), 61 ASN1_ITEM_ref(ASN1_PRINTABLE), 62 ASN1_ITEM_ref(ASN1_PRINTABLESTRING), 63 ASN1_ITEM_ref(ASN1_SEQUENCE), 64 ASN1_ITEM_ref(ASN1_SEQUENCE_ANY), 65 ASN1_ITEM_ref(ASN1_SET_ANY), 66 ASN1_ITEM_ref(ASN1_T61STRING), 67 ASN1_ITEM_ref(ASN1_TBOOLEAN), 68 ASN1_ITEM_ref(ASN1_TIME), 69 ASN1_ITEM_ref(ASN1_UNIVERSALSTRING), 70 ASN1_ITEM_ref(ASN1_UTCTIME), 71 ASN1_ITEM_ref(ASN1_UTF8STRING), 72 ASN1_ITEM_ref(ASN1_VISIBLESTRING), 73#ifndef OPENSSL_NO_RFC3779 74 ASN1_ITEM_ref(ASRange), 75#endif 76 ASN1_ITEM_ref(AUTHORITY_INFO_ACCESS), 77 ASN1_ITEM_ref(AUTHORITY_KEYID), 78 ASN1_ITEM_ref(BASIC_CONSTRAINTS), 79 ASN1_ITEM_ref(BIGNUM), 80 ASN1_ITEM_ref(CBIGNUM), 81 ASN1_ITEM_ref(CERTIFICATEPOLICIES), 82#ifndef OPENSSL_NO_CMS 83 ASN1_ITEM_ref(CMS_ContentInfo), 84 ASN1_ITEM_ref(CMS_ReceiptRequest), 85 ASN1_ITEM_ref(CRL_DIST_POINTS), 86#endif 87#ifndef OPENSSL_NO_DH 88 ASN1_ITEM_ref(DHparams), 89#endif 90 ASN1_ITEM_ref(DIRECTORYSTRING), 91 ASN1_ITEM_ref(DISPLAYTEXT), 92 ASN1_ITEM_ref(DIST_POINT), 93 ASN1_ITEM_ref(DIST_POINT_NAME), 94#ifndef OPENSSL_NO_EC 95 ASN1_ITEM_ref(ECPARAMETERS), 96 ASN1_ITEM_ref(ECPKPARAMETERS), 97#endif 98 ASN1_ITEM_ref(EDIPARTYNAME), 99 ASN1_ITEM_ref(EXTENDED_KEY_USAGE), 100 ASN1_ITEM_ref(GENERAL_NAME), 101 ASN1_ITEM_ref(GENERAL_NAMES), 102 ASN1_ITEM_ref(GENERAL_SUBTREE), 103#ifndef OPENSSL_NO_RFC3779 104 ASN1_ITEM_ref(IPAddressChoice), 105 ASN1_ITEM_ref(IPAddressFamily), 106 ASN1_ITEM_ref(IPAddressOrRange), 107 ASN1_ITEM_ref(IPAddressRange), 108#endif 109 ASN1_ITEM_ref(ISSUING_DIST_POINT), 110#if OPENSSL_API_COMPAT < 0x10200000L 111 ASN1_ITEM_ref(LONG), 112#endif 113 ASN1_ITEM_ref(NAME_CONSTRAINTS), 114 ASN1_ITEM_ref(NETSCAPE_CERT_SEQUENCE), 115 ASN1_ITEM_ref(NETSCAPE_SPKAC), 116 ASN1_ITEM_ref(NETSCAPE_SPKI), 117 ASN1_ITEM_ref(NOTICEREF), 118#ifndef OPENSSL_NO_OCSP 119 ASN1_ITEM_ref(OCSP_BASICRESP), 120 ASN1_ITEM_ref(OCSP_CERTID), 121 ASN1_ITEM_ref(OCSP_CERTSTATUS), 122 ASN1_ITEM_ref(OCSP_CRLID), 123 ASN1_ITEM_ref(OCSP_ONEREQ), 124 ASN1_ITEM_ref(OCSP_REQINFO), 125 ASN1_ITEM_ref(OCSP_REQUEST), 126 ASN1_ITEM_ref(OCSP_RESPBYTES), 127 ASN1_ITEM_ref(OCSP_RESPDATA), 128 ASN1_ITEM_ref(OCSP_RESPID), 129 ASN1_ITEM_ref(OCSP_RESPONSE), 130 ASN1_ITEM_ref(OCSP_REVOKEDINFO), 131 ASN1_ITEM_ref(OCSP_SERVICELOC), 132 ASN1_ITEM_ref(OCSP_SIGNATURE), 133 ASN1_ITEM_ref(OCSP_SINGLERESP), 134#endif 135 ASN1_ITEM_ref(OTHERNAME), 136 ASN1_ITEM_ref(PBE2PARAM), 137 ASN1_ITEM_ref(PBEPARAM), 138 ASN1_ITEM_ref(PBKDF2PARAM), 139 ASN1_ITEM_ref(PKCS12), 140 ASN1_ITEM_ref(PKCS12_AUTHSAFES), 141 ASN1_ITEM_ref(PKCS12_BAGS), 142 ASN1_ITEM_ref(PKCS12_MAC_DATA), 143 ASN1_ITEM_ref(PKCS12_SAFEBAG), 144 ASN1_ITEM_ref(PKCS12_SAFEBAGS), 145 ASN1_ITEM_ref(PKCS7), 146 ASN1_ITEM_ref(PKCS7_ATTR_SIGN), 147 ASN1_ITEM_ref(PKCS7_ATTR_VERIFY), 148 ASN1_ITEM_ref(PKCS7_DIGEST), 149 ASN1_ITEM_ref(PKCS7_ENC_CONTENT), 150 ASN1_ITEM_ref(PKCS7_ENCRYPT), 151 ASN1_ITEM_ref(PKCS7_ENVELOPE), 152 ASN1_ITEM_ref(PKCS7_ISSUER_AND_SERIAL), 153 ASN1_ITEM_ref(PKCS7_RECIP_INFO), 154 ASN1_ITEM_ref(PKCS7_SIGNED), 155 ASN1_ITEM_ref(PKCS7_SIGN_ENVELOPE), 156 ASN1_ITEM_ref(PKCS7_SIGNER_INFO), 157 ASN1_ITEM_ref(PKCS8_PRIV_KEY_INFO), 158 ASN1_ITEM_ref(PKEY_USAGE_PERIOD), 159 ASN1_ITEM_ref(POLICY_CONSTRAINTS), 160 ASN1_ITEM_ref(POLICYINFO), 161 ASN1_ITEM_ref(POLICY_MAPPING), 162 ASN1_ITEM_ref(POLICY_MAPPINGS), 163 ASN1_ITEM_ref(POLICYQUALINFO), 164 ASN1_ITEM_ref(PROXY_CERT_INFO_EXTENSION), 165 ASN1_ITEM_ref(PROXY_POLICY), 166 ASN1_ITEM_ref(RSA_OAEP_PARAMS), 167 ASN1_ITEM_ref(RSAPrivateKey), 168 ASN1_ITEM_ref(RSA_PSS_PARAMS), 169 ASN1_ITEM_ref(RSAPublicKey), 170 ASN1_ITEM_ref(SXNET), 171 ASN1_ITEM_ref(SXNETID), 172 ASN1_ITEM_ref(USERNOTICE), 173 ASN1_ITEM_ref(X509), 174 ASN1_ITEM_ref(X509_ALGOR), 175 ASN1_ITEM_ref(X509_ALGORS), 176 ASN1_ITEM_ref(X509_ATTRIBUTE), 177 ASN1_ITEM_ref(X509_CERT_AUX), 178 ASN1_ITEM_ref(X509_CINF), 179 ASN1_ITEM_ref(X509_CRL), 180 ASN1_ITEM_ref(X509_CRL_INFO), 181 ASN1_ITEM_ref(X509_EXTENSION), 182 ASN1_ITEM_ref(X509_EXTENSIONS), 183 ASN1_ITEM_ref(X509_NAME), 184 ASN1_ITEM_ref(X509_NAME_ENTRY), 185 ASN1_ITEM_ref(X509_PUBKEY), 186 ASN1_ITEM_ref(X509_REQ), 187 ASN1_ITEM_ref(X509_REQ_INFO), 188 ASN1_ITEM_ref(X509_REVOKED), 189 ASN1_ITEM_ref(X509_SIG), 190 ASN1_ITEM_ref(X509_VAL), 191#if OPENSSL_API_COMPAT < 0x10200000L 192 ASN1_ITEM_ref(ZLONG), 193#endif 194 ASN1_ITEM_ref(INT32), 195 ASN1_ITEM_ref(ZINT32), 196 ASN1_ITEM_ref(UINT32), 197 ASN1_ITEM_ref(ZUINT32), 198 ASN1_ITEM_ref(INT64), 199 ASN1_ITEM_ref(ZINT64), 200 ASN1_ITEM_ref(UINT64), 201 ASN1_ITEM_ref(ZUINT64), 202 NULL 203}; 204 205static ASN1_PCTX *pctx; 206 207#define DO_TEST(TYPE, D2I, I2D, PRINT) { \ 208 const unsigned char *p = buf; \ 209 unsigned char *der = NULL; \ 210 TYPE *type = D2I(NULL, &p, len); \ 211 \ 212 if (type != NULL) { \ 213 int len2; \ 214 BIO *bio = BIO_new(BIO_s_null()); \ 215 \ 216 PRINT(bio, type); \ 217 BIO_free(bio); \ 218 len2 = I2D(type, &der); \ 219 if (len2 != 0) {} \ 220 OPENSSL_free(der); \ 221 TYPE ## _free(type); \ 222 } \ 223} 224 225#define DO_TEST_PRINT_OFFSET(TYPE, D2I, I2D, PRINT) { \ 226 const unsigned char *p = buf; \ 227 unsigned char *der = NULL; \ 228 TYPE *type = D2I(NULL, &p, len); \ 229 \ 230 if (type != NULL) { \ 231 BIO *bio = BIO_new(BIO_s_null()); \ 232 \ 233 PRINT(bio, type, 0); \ 234 BIO_free(bio); \ 235 I2D(type, &der); \ 236 OPENSSL_free(der); \ 237 TYPE ## _free(type); \ 238 } \ 239} 240 241#define DO_TEST_PRINT_PCTX(TYPE, D2I, I2D, PRINT) { \ 242 const unsigned char *p = buf; \ 243 unsigned char *der = NULL; \ 244 TYPE *type = D2I(NULL, &p, len); \ 245 \ 246 if (type != NULL) { \ 247 BIO *bio = BIO_new(BIO_s_null()); \ 248 \ 249 PRINT(bio, type, 0, pctx); \ 250 BIO_free(bio); \ 251 I2D(type, &der); \ 252 OPENSSL_free(der); \ 253 TYPE ## _free(type); \ 254 } \ 255} 256 257 258#define DO_TEST_NO_PRINT(TYPE, D2I, I2D) { \ 259 const unsigned char *p = buf; \ 260 unsigned char *der = NULL; \ 261 TYPE *type = D2I(NULL, &p, len); \ 262 \ 263 if (type != NULL) { \ 264 BIO *bio = BIO_new(BIO_s_null()); \ 265 \ 266 BIO_free(bio); \ 267 I2D(type, &der); \ 268 OPENSSL_free(der); \ 269 TYPE ## _free(type); \ 270 } \ 271} 272 273 274int FuzzerInitialize(int *argc, char ***argv) 275{ 276 pctx = ASN1_PCTX_new(); 277 ASN1_PCTX_set_flags(pctx, ASN1_PCTX_FLAGS_SHOW_ABSENT | 278 ASN1_PCTX_FLAGS_SHOW_SEQUENCE | ASN1_PCTX_FLAGS_SHOW_SSOF | 279 ASN1_PCTX_FLAGS_SHOW_TYPE | ASN1_PCTX_FLAGS_SHOW_FIELD_STRUCT_NAME); 280 ASN1_PCTX_set_str_flags(pctx, ASN1_STRFLGS_UTF8_CONVERT | 281 ASN1_STRFLGS_SHOW_TYPE | ASN1_STRFLGS_DUMP_ALL); 282 283 OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CRYPTO_STRINGS, NULL); 284 OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS, NULL); 285 ERR_get_state(); 286 CRYPTO_free_ex_index(0, -1); 287 FuzzerSetRand(); 288 289 return 1; 290} 291 292int FuzzerTestOneInput(const uint8_t *buf, size_t len) 293{ 294 int n; 295 296 297 for (n = 0; item_type[n] != NULL; ++n) { 298 const uint8_t *b = buf; 299 unsigned char *der = NULL; 300 const ASN1_ITEM *i = ASN1_ITEM_ptr(item_type[n]); 301 ASN1_VALUE *o = ASN1_item_d2i(NULL, &b, len, i); 302 303 if (o != NULL) { 304 BIO *bio = BIO_new(BIO_s_null()); 305 306 ASN1_item_print(bio, o, 4, i, pctx); 307 BIO_free(bio); 308 ASN1_item_i2d(o, &der, i); 309 OPENSSL_free(der); 310 ASN1_item_free(o, i); 311 } 312 } 313 314#ifndef OPENSSL_NO_TS 315 DO_TEST(TS_REQ, d2i_TS_REQ, i2d_TS_REQ, TS_REQ_print_bio); 316 DO_TEST(TS_MSG_IMPRINT, d2i_TS_MSG_IMPRINT, i2d_TS_MSG_IMPRINT, TS_MSG_IMPRINT_print_bio); 317 DO_TEST(TS_RESP, d2i_TS_RESP, i2d_TS_RESP, TS_RESP_print_bio); 318 DO_TEST(TS_STATUS_INFO, d2i_TS_STATUS_INFO, i2d_TS_STATUS_INFO, TS_STATUS_INFO_print_bio); 319 DO_TEST(TS_TST_INFO, d2i_TS_TST_INFO, i2d_TS_TST_INFO, TS_TST_INFO_print_bio); 320 DO_TEST_NO_PRINT(TS_ACCURACY, d2i_TS_ACCURACY, i2d_TS_ACCURACY); 321 DO_TEST_NO_PRINT(ESS_ISSUER_SERIAL, d2i_ESS_ISSUER_SERIAL, i2d_ESS_ISSUER_SERIAL); 322 DO_TEST_NO_PRINT(ESS_CERT_ID, d2i_ESS_CERT_ID, i2d_ESS_CERT_ID); 323 DO_TEST_NO_PRINT(ESS_SIGNING_CERT, d2i_ESS_SIGNING_CERT, i2d_ESS_SIGNING_CERT); 324#endif 325#ifndef OPENSSL_NO_DH 326 DO_TEST(DH, d2i_DHparams, i2d_DHparams, DHparams_print); 327 DO_TEST(DH, d2i_DHxparams, i2d_DHxparams, DHparams_print); 328#endif 329#ifndef OPENSSL_NO_DSA 330 DO_TEST_NO_PRINT(DSA_SIG, d2i_DSA_SIG, i2d_DSA_SIG); 331 DO_TEST_PRINT_OFFSET(DSA, d2i_DSAPrivateKey, i2d_DSAPrivateKey, DSA_print); 332 DO_TEST_PRINT_OFFSET(DSA, d2i_DSAPublicKey, i2d_DSAPublicKey, DSA_print); 333 DO_TEST(DSA, d2i_DSAparams, i2d_DSAparams, DSAparams_print); 334#endif 335 DO_TEST_PRINT_OFFSET(RSA, d2i_RSAPublicKey, i2d_RSAPublicKey, RSA_print); 336#ifndef OPENSSL_NO_EC 337 DO_TEST_PRINT_OFFSET(EC_GROUP, d2i_ECPKParameters, i2d_ECPKParameters, ECPKParameters_print); 338 DO_TEST_PRINT_OFFSET(EC_KEY, d2i_ECPrivateKey, i2d_ECPrivateKey, EC_KEY_print); 339 DO_TEST(EC_KEY, d2i_ECParameters, i2d_ECParameters, ECParameters_print); 340 DO_TEST_NO_PRINT(ECDSA_SIG, d2i_ECDSA_SIG, i2d_ECDSA_SIG); 341#endif 342 DO_TEST_PRINT_PCTX(EVP_PKEY, d2i_AutoPrivateKey, i2d_PrivateKey, EVP_PKEY_print_private); 343 DO_TEST(SSL_SESSION, d2i_SSL_SESSION, i2d_SSL_SESSION, SSL_SESSION_print); 344 345 ERR_clear_error(); 346 347 return 0; 348} 349 350void FuzzerCleanup(void) 351{ 352 ASN1_PCTX_free(pctx); 353} 354