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
43static 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
210static 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
285int 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
303int 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
371void FuzzerCleanup(void)
372{
373    ASN1_PCTX_free(pctx);
374    FuzzerClearRand();
375}
376