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 <openssl/x509_acert.h> 41 #include "internal/nelem.h" 42 #include "fuzzer.h" 43 44 static ASN1_ITEM_EXP *item_type[] = { 45 ASN1_ITEM_ref(ACCESS_DESCRIPTION), 46 #ifndef OPENSSL_NO_RFC3779 47 ASN1_ITEM_ref(ASIdentifierChoice), 48 ASN1_ITEM_ref(ASIdentifiers), 49 ASN1_ITEM_ref(ASIdOrRange), 50 #endif 51 ASN1_ITEM_ref(ASN1_ANY), 52 ASN1_ITEM_ref(ASN1_BIT_STRING), 53 ASN1_ITEM_ref(ASN1_BMPSTRING), 54 ASN1_ITEM_ref(ASN1_BOOLEAN), 55 ASN1_ITEM_ref(ASN1_ENUMERATED), 56 ASN1_ITEM_ref(ASN1_FBOOLEAN), 57 ASN1_ITEM_ref(ASN1_GENERALIZEDTIME), 58 ASN1_ITEM_ref(ASN1_GENERALSTRING), 59 ASN1_ITEM_ref(ASN1_IA5STRING), 60 ASN1_ITEM_ref(ASN1_INTEGER), 61 ASN1_ITEM_ref(ASN1_NULL), 62 ASN1_ITEM_ref(ASN1_OBJECT), 63 ASN1_ITEM_ref(ASN1_OCTET_STRING), 64 ASN1_ITEM_ref(ASN1_OCTET_STRING_NDEF), 65 ASN1_ITEM_ref(ASN1_PRINTABLE), 66 ASN1_ITEM_ref(ASN1_PRINTABLESTRING), 67 ASN1_ITEM_ref(ASN1_SEQUENCE), 68 ASN1_ITEM_ref(ASN1_SEQUENCE_ANY), 69 ASN1_ITEM_ref(ASN1_SET_ANY), 70 ASN1_ITEM_ref(ASN1_T61STRING), 71 ASN1_ITEM_ref(ASN1_TBOOLEAN), 72 ASN1_ITEM_ref(ASN1_TIME), 73 ASN1_ITEM_ref(ASN1_UNIVERSALSTRING), 74 ASN1_ITEM_ref(ASN1_UTCTIME), 75 ASN1_ITEM_ref(ASN1_UTF8STRING), 76 ASN1_ITEM_ref(ASN1_VISIBLESTRING), 77 #ifndef OPENSSL_NO_RFC3779 78 ASN1_ITEM_ref(ASRange), 79 #endif 80 ASN1_ITEM_ref(AUTHORITY_INFO_ACCESS), 81 ASN1_ITEM_ref(AUTHORITY_KEYID), 82 ASN1_ITEM_ref(BASIC_CONSTRAINTS), 83 ASN1_ITEM_ref(BIGNUM), 84 ASN1_ITEM_ref(CBIGNUM), 85 ASN1_ITEM_ref(CERTIFICATEPOLICIES), 86 #ifndef OPENSSL_NO_CMS 87 ASN1_ITEM_ref(CMS_ContentInfo), 88 ASN1_ITEM_ref(CMS_ReceiptRequest), 89 ASN1_ITEM_ref(CRL_DIST_POINTS), 90 #endif 91 #ifndef OPENSSL_NO_DH 92 ASN1_ITEM_ref(DHparams), 93 #endif 94 ASN1_ITEM_ref(DIRECTORYSTRING), 95 ASN1_ITEM_ref(DISPLAYTEXT), 96 ASN1_ITEM_ref(DIST_POINT), 97 ASN1_ITEM_ref(DIST_POINT_NAME), 98 #if !defined(OPENSSL_NO_EC) && !defined(OPENSSL_NO_DEPRECATED_3_0) 99 ASN1_ITEM_ref(ECPARAMETERS), 100 ASN1_ITEM_ref(ECPKPARAMETERS), 101 #endif 102 ASN1_ITEM_ref(EDIPARTYNAME), 103 ASN1_ITEM_ref(EXTENDED_KEY_USAGE), 104 ASN1_ITEM_ref(GENERAL_NAME), 105 ASN1_ITEM_ref(GENERAL_NAMES), 106 ASN1_ITEM_ref(GENERAL_SUBTREE), 107 #ifndef OPENSSL_NO_RFC3779 108 ASN1_ITEM_ref(IPAddressChoice), 109 ASN1_ITEM_ref(IPAddressFamily), 110 ASN1_ITEM_ref(IPAddressOrRange), 111 ASN1_ITEM_ref(IPAddressRange), 112 #endif 113 ASN1_ITEM_ref(ISSUING_DIST_POINT), 114 #ifndef OPENSSL_NO_DEPRECATED_3_0 115 ASN1_ITEM_ref(LONG), 116 #endif 117 ASN1_ITEM_ref(NAME_CONSTRAINTS), 118 ASN1_ITEM_ref(NETSCAPE_CERT_SEQUENCE), 119 ASN1_ITEM_ref(NETSCAPE_SPKAC), 120 ASN1_ITEM_ref(NETSCAPE_SPKI), 121 ASN1_ITEM_ref(NOTICEREF), 122 #ifndef OPENSSL_NO_OCSP 123 ASN1_ITEM_ref(OCSP_BASICRESP), 124 ASN1_ITEM_ref(OCSP_CERTID), 125 ASN1_ITEM_ref(OCSP_CERTSTATUS), 126 ASN1_ITEM_ref(OCSP_CRLID), 127 ASN1_ITEM_ref(OCSP_ONEREQ), 128 ASN1_ITEM_ref(OCSP_REQINFO), 129 ASN1_ITEM_ref(OCSP_REQUEST), 130 ASN1_ITEM_ref(OCSP_RESPBYTES), 131 ASN1_ITEM_ref(OCSP_RESPDATA), 132 ASN1_ITEM_ref(OCSP_RESPID), 133 ASN1_ITEM_ref(OCSP_RESPONSE), 134 ASN1_ITEM_ref(OCSP_REVOKEDINFO), 135 ASN1_ITEM_ref(OCSP_SERVICELOC), 136 ASN1_ITEM_ref(OCSP_SIGNATURE), 137 ASN1_ITEM_ref(OCSP_SINGLERESP), 138 #endif 139 ASN1_ITEM_ref(OTHERNAME), 140 ASN1_ITEM_ref(PBE2PARAM), 141 ASN1_ITEM_ref(PBEPARAM), 142 ASN1_ITEM_ref(PBKDF2PARAM), 143 ASN1_ITEM_ref(PKCS12), 144 ASN1_ITEM_ref(PKCS12_AUTHSAFES), 145 ASN1_ITEM_ref(PKCS12_BAGS), 146 ASN1_ITEM_ref(PKCS12_MAC_DATA), 147 ASN1_ITEM_ref(PKCS12_SAFEBAG), 148 ASN1_ITEM_ref(PKCS12_SAFEBAGS), 149 ASN1_ITEM_ref(PKCS7), 150 ASN1_ITEM_ref(PKCS7_ATTR_SIGN), 151 ASN1_ITEM_ref(PKCS7_ATTR_VERIFY), 152 ASN1_ITEM_ref(PKCS7_DIGEST), 153 ASN1_ITEM_ref(PKCS7_ENC_CONTENT), 154 ASN1_ITEM_ref(PKCS7_ENCRYPT), 155 ASN1_ITEM_ref(PKCS7_ENVELOPE), 156 ASN1_ITEM_ref(PKCS7_ISSUER_AND_SERIAL), 157 ASN1_ITEM_ref(PKCS7_RECIP_INFO), 158 ASN1_ITEM_ref(PKCS7_SIGNED), 159 ASN1_ITEM_ref(PKCS7_SIGN_ENVELOPE), 160 ASN1_ITEM_ref(PKCS7_SIGNER_INFO), 161 ASN1_ITEM_ref(PKCS8_PRIV_KEY_INFO), 162 ASN1_ITEM_ref(PKEY_USAGE_PERIOD), 163 ASN1_ITEM_ref(POLICY_CONSTRAINTS), 164 ASN1_ITEM_ref(POLICYINFO), 165 ASN1_ITEM_ref(POLICY_MAPPING), 166 ASN1_ITEM_ref(POLICY_MAPPINGS), 167 ASN1_ITEM_ref(POLICYQUALINFO), 168 ASN1_ITEM_ref(PROXY_CERT_INFO_EXTENSION), 169 ASN1_ITEM_ref(PROXY_POLICY), 170 ASN1_ITEM_ref(RSA_OAEP_PARAMS), 171 ASN1_ITEM_ref(RSA_PSS_PARAMS), 172 #ifndef OPENSSL_NO_DEPRECATED_3_0 173 ASN1_ITEM_ref(RSAPrivateKey), 174 ASN1_ITEM_ref(RSAPublicKey), 175 #endif 176 ASN1_ITEM_ref(SXNET), 177 ASN1_ITEM_ref(SXNETID), 178 ASN1_ITEM_ref(OSSL_TARGETING_INFORMATION), 179 ASN1_ITEM_ref(USERNOTICE), 180 ASN1_ITEM_ref(X509), 181 ASN1_ITEM_ref(X509_ALGOR), 182 ASN1_ITEM_ref(X509_ALGORS), 183 ASN1_ITEM_ref(X509_ATTRIBUTE), 184 ASN1_ITEM_ref(X509_CERT_AUX), 185 ASN1_ITEM_ref(X509_CINF), 186 ASN1_ITEM_ref(X509_CRL), 187 ASN1_ITEM_ref(X509_CRL_INFO), 188 ASN1_ITEM_ref(X509_EXTENSION), 189 ASN1_ITEM_ref(X509_EXTENSIONS), 190 ASN1_ITEM_ref(X509_NAME), 191 ASN1_ITEM_ref(X509_NAME_ENTRY), 192 ASN1_ITEM_ref(X509_PUBKEY), 193 ASN1_ITEM_ref(X509_REQ), 194 ASN1_ITEM_ref(X509_REQ_INFO), 195 ASN1_ITEM_ref(X509_REVOKED), 196 ASN1_ITEM_ref(X509_SIG), 197 ASN1_ITEM_ref(X509_VAL), 198 #ifndef OPENSSL_NO_DEPRECATED_3_0 199 ASN1_ITEM_ref(ZLONG), 200 #endif 201 ASN1_ITEM_ref(INT32), 202 ASN1_ITEM_ref(ZINT32), 203 ASN1_ITEM_ref(UINT32), 204 ASN1_ITEM_ref(ZUINT32), 205 ASN1_ITEM_ref(INT64), 206 ASN1_ITEM_ref(ZINT64), 207 ASN1_ITEM_ref(UINT64), 208 ASN1_ITEM_ref(ZUINT64), 209 NULL 210 }; 211 212 static ASN1_PCTX *pctx; 213 214 #define DO_TEST(TYPE, D2I, I2D, PRINT) { \ 215 const unsigned char *p = buf; \ 216 unsigned char *der = NULL; \ 217 TYPE *type = D2I(NULL, &p, len); \ 218 \ 219 if (type != NULL) { \ 220 int len2; \ 221 BIO *bio = BIO_new(BIO_s_null()); \ 222 \ 223 if (bio != NULL) { \ 224 PRINT(bio, type); \ 225 BIO_free(bio); \ 226 } \ 227 len2 = I2D(type, &der); \ 228 if (len2 != 0) {} \ 229 OPENSSL_free(der); \ 230 TYPE ## _free(type); \ 231 } \ 232 } 233 234 #define DO_TEST_PRINT_OFFSET(TYPE, D2I, I2D, PRINT) { \ 235 const unsigned char *p = buf; \ 236 unsigned char *der = NULL; \ 237 TYPE *type = D2I(NULL, &p, len); \ 238 \ 239 if (type != NULL) { \ 240 BIO *bio = BIO_new(BIO_s_null()); \ 241 \ 242 if (bio != NULL) { \ 243 PRINT(bio, type, 0); \ 244 BIO_free(bio); \ 245 } \ 246 I2D(type, &der); \ 247 OPENSSL_free(der); \ 248 TYPE ## _free(type); \ 249 } \ 250 } 251 252 #define DO_TEST_PRINT_PCTX(TYPE, D2I, I2D, PRINT) { \ 253 const unsigned char *p = buf; \ 254 unsigned char *der = NULL; \ 255 TYPE *type = D2I(NULL, &p, len); \ 256 \ 257 if (type != NULL) { \ 258 BIO *bio = BIO_new(BIO_s_null()); \ 259 \ 260 if (bio != NULL) { \ 261 PRINT(bio, type, 0, pctx); \ 262 BIO_free(bio); \ 263 } \ 264 I2D(type, &der); \ 265 OPENSSL_free(der); \ 266 TYPE ## _free(type); \ 267 } \ 268 } 269 270 271 #define DO_TEST_NO_PRINT(TYPE, D2I, I2D) { \ 272 const unsigned char *p = buf; \ 273 unsigned char *der = NULL; \ 274 TYPE *type = D2I(NULL, &p, len); \ 275 \ 276 if (type != NULL) { \ 277 BIO *bio = BIO_new(BIO_s_null()); \ 278 \ 279 BIO_free(bio); \ 280 I2D(type, &der); \ 281 OPENSSL_free(der); \ 282 TYPE ## _free(type); \ 283 } \ 284 } 285 286 287 int FuzzerInitialize(int *argc, char ***argv) 288 { 289 FuzzerSetRand(); 290 pctx = ASN1_PCTX_new(); 291 ASN1_PCTX_set_flags(pctx, ASN1_PCTX_FLAGS_SHOW_ABSENT | 292 ASN1_PCTX_FLAGS_SHOW_SEQUENCE | ASN1_PCTX_FLAGS_SHOW_SSOF | 293 ASN1_PCTX_FLAGS_SHOW_TYPE | ASN1_PCTX_FLAGS_SHOW_FIELD_STRUCT_NAME); 294 ASN1_PCTX_set_str_flags(pctx, ASN1_STRFLGS_UTF8_CONVERT | 295 ASN1_STRFLGS_SHOW_TYPE | ASN1_STRFLGS_DUMP_ALL); 296 297 OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CRYPTO_STRINGS, NULL); 298 OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS, NULL); 299 ERR_clear_error(); 300 CRYPTO_free_ex_index(0, -1); 301 302 return 1; 303 } 304 305 int FuzzerTestOneInput(const uint8_t *buf, size_t len) 306 { 307 int n; 308 309 310 for (n = 0; item_type[n] != NULL; ++n) { 311 const uint8_t *b = buf; 312 unsigned char *der = NULL; 313 const ASN1_ITEM *i = ASN1_ITEM_ptr(item_type[n]); 314 ASN1_VALUE *o = ASN1_item_d2i(NULL, &b, len, i); 315 316 if (o != NULL) { 317 /* 318 * Don't print excessively long output to prevent spurious fuzzer 319 * timeouts. 320 */ 321 if (b - buf < 10000) { 322 BIO *bio = BIO_new(BIO_s_null()); 323 if (bio != NULL) { 324 ASN1_item_print(bio, o, 4, i, pctx); 325 BIO_free(bio); 326 } 327 } 328 if (ASN1_item_i2d(o, &der, i) > 0) { 329 OPENSSL_free(der); 330 } 331 ASN1_item_free(o, i); 332 } 333 } 334 335 #ifndef OPENSSL_NO_TS 336 DO_TEST(TS_REQ, d2i_TS_REQ, i2d_TS_REQ, TS_REQ_print_bio); 337 DO_TEST(TS_MSG_IMPRINT, d2i_TS_MSG_IMPRINT, i2d_TS_MSG_IMPRINT, TS_MSG_IMPRINT_print_bio); 338 DO_TEST(TS_RESP, d2i_TS_RESP, i2d_TS_RESP, TS_RESP_print_bio); 339 DO_TEST(TS_STATUS_INFO, d2i_TS_STATUS_INFO, i2d_TS_STATUS_INFO, TS_STATUS_INFO_print_bio); 340 DO_TEST(TS_TST_INFO, d2i_TS_TST_INFO, i2d_TS_TST_INFO, TS_TST_INFO_print_bio); 341 DO_TEST_NO_PRINT(TS_ACCURACY, d2i_TS_ACCURACY, i2d_TS_ACCURACY); 342 #endif 343 DO_TEST_NO_PRINT(ESS_ISSUER_SERIAL, d2i_ESS_ISSUER_SERIAL, i2d_ESS_ISSUER_SERIAL); 344 DO_TEST_NO_PRINT(ESS_CERT_ID, d2i_ESS_CERT_ID, i2d_ESS_CERT_ID); 345 DO_TEST_NO_PRINT(ESS_SIGNING_CERT, d2i_ESS_SIGNING_CERT, i2d_ESS_SIGNING_CERT); 346 DO_TEST_NO_PRINT(ESS_CERT_ID_V2, d2i_ESS_CERT_ID_V2, i2d_ESS_CERT_ID_V2); 347 DO_TEST_NO_PRINT(ESS_SIGNING_CERT_V2, d2i_ESS_SIGNING_CERT_V2, i2d_ESS_SIGNING_CERT_V2); 348 #if !defined(OPENSSL_NO_DH) && !defined(OPENSSL_NO_DEPRECATED_3_0) 349 DO_TEST_NO_PRINT(DH, d2i_DHparams, i2d_DHparams); 350 DO_TEST_NO_PRINT(DH, d2i_DHxparams, i2d_DHxparams); 351 #endif 352 #ifndef OPENSSL_NO_DSA 353 DO_TEST_NO_PRINT(DSA_SIG, d2i_DSA_SIG, i2d_DSA_SIG); 354 # ifndef OPENSSL_NO_DEPRECATED_3_0 355 DO_TEST_NO_PRINT(DSA, d2i_DSAPrivateKey, i2d_DSAPrivateKey); 356 DO_TEST_NO_PRINT(DSA, d2i_DSAPublicKey, i2d_DSAPublicKey); 357 DO_TEST_NO_PRINT(DSA, d2i_DSAparams, i2d_DSAparams); 358 # endif 359 #endif 360 #ifndef OPENSSL_NO_DEPRECATED_3_0 361 DO_TEST_NO_PRINT(RSA, d2i_RSAPublicKey, i2d_RSAPublicKey); 362 #endif 363 #ifndef OPENSSL_NO_EC 364 # ifndef OPENSSL_NO_DEPRECATED_3_0 365 DO_TEST_PRINT_OFFSET(EC_GROUP, d2i_ECPKParameters, i2d_ECPKParameters, ECPKParameters_print); 366 DO_TEST_PRINT_OFFSET(EC_KEY, d2i_ECPrivateKey, i2d_ECPrivateKey, EC_KEY_print); 367 DO_TEST(EC_KEY, d2i_ECParameters, i2d_ECParameters, ECParameters_print); 368 DO_TEST_NO_PRINT(ECDSA_SIG, d2i_ECDSA_SIG, i2d_ECDSA_SIG); 369 # endif 370 #endif 371 DO_TEST_PRINT_PCTX(EVP_PKEY, d2i_AutoPrivateKey, i2d_PrivateKey, EVP_PKEY_print_private); 372 DO_TEST(SSL_SESSION, d2i_SSL_SESSION, i2d_SSL_SESSION, SSL_SESSION_print); 373 374 ERR_clear_error(); 375 376 return 0; 377 } 378 379 void FuzzerCleanup(void) 380 { 381 ASN1_PCTX_free(pctx); 382 FuzzerClearRand(); 383 } 384