1 /* 2 * Copyright 2016-2022 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 BIO *bio = BIO_new(BIO_s_null()); 316 if (bio != NULL) { 317 ASN1_item_print(bio, o, 4, i, pctx); 318 BIO_free(bio); 319 } 320 if (ASN1_item_i2d(o, &der, i) > 0) { 321 OPENSSL_free(der); 322 } 323 ASN1_item_free(o, i); 324 } 325 } 326 327 #ifndef OPENSSL_NO_TS 328 DO_TEST(TS_REQ, d2i_TS_REQ, i2d_TS_REQ, TS_REQ_print_bio); 329 DO_TEST(TS_MSG_IMPRINT, d2i_TS_MSG_IMPRINT, i2d_TS_MSG_IMPRINT, TS_MSG_IMPRINT_print_bio); 330 DO_TEST(TS_RESP, d2i_TS_RESP, i2d_TS_RESP, TS_RESP_print_bio); 331 DO_TEST(TS_STATUS_INFO, d2i_TS_STATUS_INFO, i2d_TS_STATUS_INFO, TS_STATUS_INFO_print_bio); 332 DO_TEST(TS_TST_INFO, d2i_TS_TST_INFO, i2d_TS_TST_INFO, TS_TST_INFO_print_bio); 333 DO_TEST_NO_PRINT(TS_ACCURACY, d2i_TS_ACCURACY, i2d_TS_ACCURACY); 334 #endif 335 DO_TEST_NO_PRINT(ESS_ISSUER_SERIAL, d2i_ESS_ISSUER_SERIAL, i2d_ESS_ISSUER_SERIAL); 336 DO_TEST_NO_PRINT(ESS_CERT_ID, d2i_ESS_CERT_ID, i2d_ESS_CERT_ID); 337 DO_TEST_NO_PRINT(ESS_SIGNING_CERT, d2i_ESS_SIGNING_CERT, i2d_ESS_SIGNING_CERT); 338 DO_TEST_NO_PRINT(ESS_CERT_ID_V2, d2i_ESS_CERT_ID_V2, i2d_ESS_CERT_ID_V2); 339 DO_TEST_NO_PRINT(ESS_SIGNING_CERT_V2, d2i_ESS_SIGNING_CERT_V2, i2d_ESS_SIGNING_CERT_V2); 340 #if !defined(OPENSSL_NO_DH) && !defined(OPENSSL_NO_DEPRECATED_3_0) 341 DO_TEST_NO_PRINT(DH, d2i_DHparams, i2d_DHparams); 342 DO_TEST_NO_PRINT(DH, d2i_DHxparams, i2d_DHxparams); 343 #endif 344 #ifndef OPENSSL_NO_DSA 345 DO_TEST_NO_PRINT(DSA_SIG, d2i_DSA_SIG, i2d_DSA_SIG); 346 # ifndef OPENSSL_NO_DEPRECATED_3_0 347 DO_TEST_NO_PRINT(DSA, d2i_DSAPrivateKey, i2d_DSAPrivateKey); 348 DO_TEST_NO_PRINT(DSA, d2i_DSAPublicKey, i2d_DSAPublicKey); 349 DO_TEST_NO_PRINT(DSA, d2i_DSAparams, i2d_DSAparams); 350 # endif 351 #endif 352 #ifndef OPENSSL_NO_DEPRECATED_3_0 353 DO_TEST_NO_PRINT(RSA, d2i_RSAPublicKey, i2d_RSAPublicKey); 354 #endif 355 #ifndef OPENSSL_NO_EC 356 # ifndef OPENSSL_NO_DEPRECATED_3_0 357 DO_TEST_PRINT_OFFSET(EC_GROUP, d2i_ECPKParameters, i2d_ECPKParameters, ECPKParameters_print); 358 DO_TEST_PRINT_OFFSET(EC_KEY, d2i_ECPrivateKey, i2d_ECPrivateKey, EC_KEY_print); 359 DO_TEST(EC_KEY, d2i_ECParameters, i2d_ECParameters, ECParameters_print); 360 DO_TEST_NO_PRINT(ECDSA_SIG, d2i_ECDSA_SIG, i2d_ECDSA_SIG); 361 # endif 362 #endif 363 DO_TEST_PRINT_PCTX(EVP_PKEY, d2i_AutoPrivateKey, i2d_PrivateKey, EVP_PKEY_print_private); 364 DO_TEST(SSL_SESSION, d2i_SSL_SESSION, i2d_SSL_SESSION, SSL_SESSION_print); 365 366 ERR_clear_error(); 367 368 return 0; 369 } 370 371 void FuzzerCleanup(void) 372 { 373 ASN1_PCTX_free(pctx); 374 FuzzerClearRand(); 375 } 376