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