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
FuzzerInitialize(int * argc,char *** argv)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
FuzzerTestOneInput(const uint8_t * buf,size_t len)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
FuzzerCleanup(void)379 void FuzzerCleanup(void)
380 {
381 ASN1_PCTX_free(pctx);
382 FuzzerClearRand();
383 }
384
