| 1 | /*
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| 2 | * Copyright 2016-2022 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the Apache License 2.0 (the "License");
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| 5 | * you may not use this file except in compliance with the License.
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| 6 | * You may obtain a copy of the License at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | * or in the file LICENSE in the source distribution.
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| 9 | */
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| 10 |
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| 11 | /*
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| 12 | * Fuzz ASN.1 parsing for various data structures. Specify which on the
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| 13 | * command line:
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| 14 | *
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| 15 | * asn1 <data structure>
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| 16 | */
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| 17 |
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| 18 | /* We need to use some deprecated APIs */
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| 19 | #define OPENSSL_SUPPRESS_DEPRECATED
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| 20 |
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| 21 | #include <stdio.h>
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| 22 | #include <string.h>
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| 23 | #include <openssl/asn1.h>
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| 24 | #include <openssl/asn1t.h>
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| 25 | #include <openssl/dh.h>
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| 26 | #include <openssl/dsa.h>
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| 27 | #include <openssl/ec.h>
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| 28 | #include <openssl/ocsp.h>
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| 29 | #include <openssl/pkcs12.h>
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| 30 | #include <openssl/rsa.h>
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| 31 | #include <openssl/ts.h>
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| 32 | #include <openssl/x509v3.h>
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| 33 | #include <openssl/cms.h>
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| 34 | #include <openssl/ess.h>
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| 35 | #include <openssl/err.h>
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| 36 | #include <openssl/rand.h>
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| 37 | #include <openssl/bio.h>
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| 38 | #include <openssl/evp.h>
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| 39 | #include <openssl/ssl.h>
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| 40 | #include "internal/nelem.h"
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| 41 | #include "fuzzer.h"
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| 42 |
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| 43 | static ASN1_ITEM_EXP *item_type[] = {
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| 44 | ASN1_ITEM_ref(ACCESS_DESCRIPTION),
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| 45 | #ifndef OPENSSL_NO_RFC3779
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| 46 | ASN1_ITEM_ref(ASIdentifierChoice),
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| 47 | ASN1_ITEM_ref(ASIdentifiers),
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| 48 | ASN1_ITEM_ref(ASIdOrRange),
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| 49 | #endif
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| 50 | ASN1_ITEM_ref(ASN1_ANY),
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| 51 | ASN1_ITEM_ref(ASN1_BIT_STRING),
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| 52 | ASN1_ITEM_ref(ASN1_BMPSTRING),
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| 53 | ASN1_ITEM_ref(ASN1_BOOLEAN),
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| 54 | ASN1_ITEM_ref(ASN1_ENUMERATED),
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| 55 | ASN1_ITEM_ref(ASN1_FBOOLEAN),
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| 56 | ASN1_ITEM_ref(ASN1_GENERALIZEDTIME),
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| 57 | ASN1_ITEM_ref(ASN1_GENERALSTRING),
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| 58 | ASN1_ITEM_ref(ASN1_IA5STRING),
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| 59 | ASN1_ITEM_ref(ASN1_INTEGER),
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| 60 | ASN1_ITEM_ref(ASN1_NULL),
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| 61 | ASN1_ITEM_ref(ASN1_OBJECT),
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| 62 | ASN1_ITEM_ref(ASN1_OCTET_STRING),
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| 63 | ASN1_ITEM_ref(ASN1_OCTET_STRING_NDEF),
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| 64 | ASN1_ITEM_ref(ASN1_PRINTABLE),
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| 65 | ASN1_ITEM_ref(ASN1_PRINTABLESTRING),
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| 66 | ASN1_ITEM_ref(ASN1_SEQUENCE),
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| 67 | ASN1_ITEM_ref(ASN1_SEQUENCE_ANY),
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| 68 | ASN1_ITEM_ref(ASN1_SET_ANY),
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| 69 | ASN1_ITEM_ref(ASN1_T61STRING),
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| 70 | ASN1_ITEM_ref(ASN1_TBOOLEAN),
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| 71 | ASN1_ITEM_ref(ASN1_TIME),
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| 72 | ASN1_ITEM_ref(ASN1_UNIVERSALSTRING),
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| 73 | ASN1_ITEM_ref(ASN1_UTCTIME),
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| 74 | ASN1_ITEM_ref(ASN1_UTF8STRING),
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| 75 | ASN1_ITEM_ref(ASN1_VISIBLESTRING),
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| 76 | #ifndef OPENSSL_NO_RFC3779
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| 77 | ASN1_ITEM_ref(ASRange),
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| 78 | #endif
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| 79 | ASN1_ITEM_ref(AUTHORITY_INFO_ACCESS),
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| 80 | ASN1_ITEM_ref(AUTHORITY_KEYID),
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| 81 | ASN1_ITEM_ref(BASIC_CONSTRAINTS),
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| 82 | ASN1_ITEM_ref(BIGNUM),
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| 83 | ASN1_ITEM_ref(CBIGNUM),
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| 84 | ASN1_ITEM_ref(CERTIFICATEPOLICIES),
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| 85 | #ifndef OPENSSL_NO_CMS
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| 86 | ASN1_ITEM_ref(CMS_ContentInfo),
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| 87 | ASN1_ITEM_ref(CMS_ReceiptRequest),
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| 88 | ASN1_ITEM_ref(CRL_DIST_POINTS),
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| 89 | #endif
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| 90 | #ifndef OPENSSL_NO_DH
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| 91 | ASN1_ITEM_ref(DHparams),
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| 92 | #endif
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| 93 | ASN1_ITEM_ref(DIRECTORYSTRING),
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| 94 | ASN1_ITEM_ref(DISPLAYTEXT),
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| 95 | ASN1_ITEM_ref(DIST_POINT),
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| 96 | ASN1_ITEM_ref(DIST_POINT_NAME),
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| 97 | #if !defined(OPENSSL_NO_EC) && !defined(OPENSSL_NO_DEPRECATED_3_0)
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| 98 | ASN1_ITEM_ref(ECPARAMETERS),
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| 99 | ASN1_ITEM_ref(ECPKPARAMETERS),
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| 100 | #endif
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| 101 | ASN1_ITEM_ref(EDIPARTYNAME),
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| 102 | ASN1_ITEM_ref(EXTENDED_KEY_USAGE),
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| 103 | ASN1_ITEM_ref(GENERAL_NAME),
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| 104 | ASN1_ITEM_ref(GENERAL_NAMES),
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| 105 | ASN1_ITEM_ref(GENERAL_SUBTREE),
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| 106 | #ifndef OPENSSL_NO_RFC3779
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| 107 | ASN1_ITEM_ref(IPAddressChoice),
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| 108 | ASN1_ITEM_ref(IPAddressFamily),
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| 109 | ASN1_ITEM_ref(IPAddressOrRange),
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| 110 | ASN1_ITEM_ref(IPAddressRange),
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| 111 | #endif
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| 112 | ASN1_ITEM_ref(ISSUING_DIST_POINT),
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| 113 | #ifndef OPENSSL_NO_DEPRECATED_3_0
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| 114 | ASN1_ITEM_ref(LONG),
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| 115 | #endif
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| 116 | ASN1_ITEM_ref(NAME_CONSTRAINTS),
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| 117 | ASN1_ITEM_ref(NETSCAPE_CERT_SEQUENCE),
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| 118 | ASN1_ITEM_ref(NETSCAPE_SPKAC),
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| 119 | ASN1_ITEM_ref(NETSCAPE_SPKI),
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| 120 | ASN1_ITEM_ref(NOTICEREF),
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| 121 | #ifndef OPENSSL_NO_OCSP
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| 122 | ASN1_ITEM_ref(OCSP_BASICRESP),
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| 123 | ASN1_ITEM_ref(OCSP_CERTID),
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| 124 | ASN1_ITEM_ref(OCSP_CERTSTATUS),
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| 125 | ASN1_ITEM_ref(OCSP_CRLID),
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| 126 | ASN1_ITEM_ref(OCSP_ONEREQ),
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| 127 | ASN1_ITEM_ref(OCSP_REQINFO),
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| 128 | ASN1_ITEM_ref(OCSP_REQUEST),
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| 129 | ASN1_ITEM_ref(OCSP_RESPBYTES),
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| 130 | ASN1_ITEM_ref(OCSP_RESPDATA),
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| 131 | ASN1_ITEM_ref(OCSP_RESPID),
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| 132 | ASN1_ITEM_ref(OCSP_RESPONSE),
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| 133 | ASN1_ITEM_ref(OCSP_REVOKEDINFO),
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| 134 | ASN1_ITEM_ref(OCSP_SERVICELOC),
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| 135 | ASN1_ITEM_ref(OCSP_SIGNATURE),
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| 136 | ASN1_ITEM_ref(OCSP_SINGLERESP),
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| 137 | #endif
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| 138 | ASN1_ITEM_ref(OTHERNAME),
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| 139 | ASN1_ITEM_ref(PBE2PARAM),
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| 140 | ASN1_ITEM_ref(PBEPARAM),
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| 141 | ASN1_ITEM_ref(PBKDF2PARAM),
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| 142 | ASN1_ITEM_ref(PKCS12),
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| 143 | ASN1_ITEM_ref(PKCS12_AUTHSAFES),
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| 144 | ASN1_ITEM_ref(PKCS12_BAGS),
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| 145 | ASN1_ITEM_ref(PKCS12_MAC_DATA),
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| 146 | ASN1_ITEM_ref(PKCS12_SAFEBAG),
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| 147 | ASN1_ITEM_ref(PKCS12_SAFEBAGS),
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| 148 | ASN1_ITEM_ref(PKCS7),
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| 149 | ASN1_ITEM_ref(PKCS7_ATTR_SIGN),
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| 150 | ASN1_ITEM_ref(PKCS7_ATTR_VERIFY),
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| 151 | ASN1_ITEM_ref(PKCS7_DIGEST),
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| 152 | ASN1_ITEM_ref(PKCS7_ENC_CONTENT),
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| 153 | ASN1_ITEM_ref(PKCS7_ENCRYPT),
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| 154 | ASN1_ITEM_ref(PKCS7_ENVELOPE),
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| 155 | ASN1_ITEM_ref(PKCS7_ISSUER_AND_SERIAL),
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| 156 | ASN1_ITEM_ref(PKCS7_RECIP_INFO),
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| 157 | ASN1_ITEM_ref(PKCS7_SIGNED),
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| 158 | ASN1_ITEM_ref(PKCS7_SIGN_ENVELOPE),
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| 159 | ASN1_ITEM_ref(PKCS7_SIGNER_INFO),
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| 160 | ASN1_ITEM_ref(PKCS8_PRIV_KEY_INFO),
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| 161 | ASN1_ITEM_ref(PKEY_USAGE_PERIOD),
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| 162 | ASN1_ITEM_ref(POLICY_CONSTRAINTS),
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| 163 | ASN1_ITEM_ref(POLICYINFO),
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| 164 | ASN1_ITEM_ref(POLICY_MAPPING),
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| 165 | ASN1_ITEM_ref(POLICY_MAPPINGS),
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| 166 | ASN1_ITEM_ref(POLICYQUALINFO),
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| 167 | ASN1_ITEM_ref(PROXY_CERT_INFO_EXTENSION),
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| 168 | ASN1_ITEM_ref(PROXY_POLICY),
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| 169 | ASN1_ITEM_ref(RSA_OAEP_PARAMS),
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| 170 | ASN1_ITEM_ref(RSA_PSS_PARAMS),
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| 171 | #ifndef OPENSSL_NO_DEPRECATED_3_0
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| 172 | ASN1_ITEM_ref(RSAPrivateKey),
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| 173 | ASN1_ITEM_ref(RSAPublicKey),
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| 174 | #endif
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| 175 | ASN1_ITEM_ref(SXNET),
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| 176 | ASN1_ITEM_ref(SXNETID),
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| 177 | ASN1_ITEM_ref(USERNOTICE),
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| 178 | ASN1_ITEM_ref(X509),
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| 179 | ASN1_ITEM_ref(X509_ALGOR),
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| 180 | ASN1_ITEM_ref(X509_ALGORS),
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| 181 | ASN1_ITEM_ref(X509_ATTRIBUTE),
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| 182 | ASN1_ITEM_ref(X509_CERT_AUX),
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| 183 | ASN1_ITEM_ref(X509_CINF),
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| 184 | ASN1_ITEM_ref(X509_CRL),
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| 185 | ASN1_ITEM_ref(X509_CRL_INFO),
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| 186 | ASN1_ITEM_ref(X509_EXTENSION),
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| 187 | ASN1_ITEM_ref(X509_EXTENSIONS),
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| 188 | ASN1_ITEM_ref(X509_NAME),
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| 189 | ASN1_ITEM_ref(X509_NAME_ENTRY),
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| 190 | ASN1_ITEM_ref(X509_PUBKEY),
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| 191 | ASN1_ITEM_ref(X509_REQ),
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| 192 | ASN1_ITEM_ref(X509_REQ_INFO),
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| 193 | ASN1_ITEM_ref(X509_REVOKED),
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| 194 | ASN1_ITEM_ref(X509_SIG),
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| 195 | ASN1_ITEM_ref(X509_VAL),
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| 196 | #ifndef OPENSSL_NO_DEPRECATED_3_0
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| 197 | ASN1_ITEM_ref(ZLONG),
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| 198 | #endif
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| 199 | ASN1_ITEM_ref(INT32),
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| 200 | ASN1_ITEM_ref(ZINT32),
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| 201 | ASN1_ITEM_ref(UINT32),
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| 202 | ASN1_ITEM_ref(ZUINT32),
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| 203 | ASN1_ITEM_ref(INT64),
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| 204 | ASN1_ITEM_ref(ZINT64),
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| 205 | ASN1_ITEM_ref(UINT64),
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| 206 | ASN1_ITEM_ref(ZUINT64),
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| 207 | NULL
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| 208 | };
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| 209 |
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| 210 | static ASN1_PCTX *pctx;
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| 211 |
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| 212 | #define DO_TEST(TYPE, D2I, I2D, PRINT) { \
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| 213 | const unsigned char *p = buf; \
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| 214 | unsigned char *der = NULL; \
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| 215 | TYPE *type = D2I(NULL, &p, len); \
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| 216 | \
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| 217 | if (type != NULL) { \
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| 218 | int len2; \
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| 219 | BIO *bio = BIO_new(BIO_s_null()); \
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| 220 | \
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| 221 | if (bio != NULL) { \
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| 222 | PRINT(bio, type); \
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| 223 | BIO_free(bio); \
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| 224 | } \
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| 225 | len2 = I2D(type, &der); \
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| 226 | if (len2 != 0) {} \
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| 227 | OPENSSL_free(der); \
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| 228 | TYPE ## _free(type); \
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| 229 | } \
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| 230 | }
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| 231 |
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| 232 | #define DO_TEST_PRINT_OFFSET(TYPE, D2I, I2D, PRINT) { \
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| 233 | const unsigned char *p = buf; \
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| 234 | unsigned char *der = NULL; \
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| 235 | TYPE *type = D2I(NULL, &p, len); \
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| 236 | \
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| 237 | if (type != NULL) { \
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| 238 | BIO *bio = BIO_new(BIO_s_null()); \
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| 239 | \
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| 240 | if (bio != NULL) { \
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| 241 | PRINT(bio, type, 0); \
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| 242 | BIO_free(bio); \
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| 243 | } \
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| 244 | I2D(type, &der); \
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| 245 | OPENSSL_free(der); \
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| 246 | TYPE ## _free(type); \
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| 247 | } \
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| 248 | }
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| 249 |
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| 250 | #define DO_TEST_PRINT_PCTX(TYPE, D2I, I2D, PRINT) { \
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| 251 | const unsigned char *p = buf; \
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| 252 | unsigned char *der = NULL; \
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| 253 | TYPE *type = D2I(NULL, &p, len); \
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| 254 | \
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| 255 | if (type != NULL) { \
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| 256 | BIO *bio = BIO_new(BIO_s_null()); \
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| 257 | \
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| 258 | if (bio != NULL) { \
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| 259 | PRINT(bio, type, 0, pctx); \
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| 260 | BIO_free(bio); \
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| 261 | } \
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| 262 | I2D(type, &der); \
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| 263 | OPENSSL_free(der); \
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| 264 | TYPE ## _free(type); \
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| 265 | } \
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| 266 | }
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| 267 |
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| 268 |
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| 269 | #define DO_TEST_NO_PRINT(TYPE, D2I, I2D) { \
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| 270 | const unsigned char *p = buf; \
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| 271 | unsigned char *der = NULL; \
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| 272 | TYPE *type = D2I(NULL, &p, len); \
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| 273 | \
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| 274 | if (type != NULL) { \
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| 275 | BIO *bio = BIO_new(BIO_s_null()); \
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| 276 | \
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| 277 | BIO_free(bio); \
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| 278 | I2D(type, &der); \
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| 279 | OPENSSL_free(der); \
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| 280 | TYPE ## _free(type); \
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| 281 | } \
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| 282 | }
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| 283 |
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| 284 |
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| 285 | int FuzzerInitialize(int *argc, char ***argv)
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| 286 | {
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| 287 | FuzzerSetRand();
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| 288 | pctx = ASN1_PCTX_new();
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| 289 | ASN1_PCTX_set_flags(pctx, ASN1_PCTX_FLAGS_SHOW_ABSENT |
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| 290 | ASN1_PCTX_FLAGS_SHOW_SEQUENCE | ASN1_PCTX_FLAGS_SHOW_SSOF |
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| 291 | ASN1_PCTX_FLAGS_SHOW_TYPE | ASN1_PCTX_FLAGS_SHOW_FIELD_STRUCT_NAME);
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| 292 | ASN1_PCTX_set_str_flags(pctx, ASN1_STRFLGS_UTF8_CONVERT |
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| 293 | ASN1_STRFLGS_SHOW_TYPE | ASN1_STRFLGS_DUMP_ALL);
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| 294 |
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| 295 | OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CRYPTO_STRINGS, NULL);
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| 296 | OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS, NULL);
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| 297 | ERR_clear_error();
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| 298 | CRYPTO_free_ex_index(0, -1);
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| 299 |
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| 300 | return 1;
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| 301 | }
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| 302 |
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| 303 | int FuzzerTestOneInput(const uint8_t *buf, size_t len)
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| 304 | {
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| 305 | int n;
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| 306 |
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| 307 |
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| 308 | for (n = 0; item_type[n] != NULL; ++n) {
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| 309 | const uint8_t *b = buf;
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| 310 | unsigned char *der = NULL;
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| 311 | const ASN1_ITEM *i = ASN1_ITEM_ptr(item_type[n]);
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| 312 | ASN1_VALUE *o = ASN1_item_d2i(NULL, &b, len, i);
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| 313 |
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| 314 | if (o != NULL) {
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| 315 | BIO *bio = BIO_new(BIO_s_null());
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| 316 | if (bio != NULL) {
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| 317 | ASN1_item_print(bio, o, 4, i, pctx);
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| 318 | BIO_free(bio);
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| 319 | }
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| 320 | if (ASN1_item_i2d(o, &der, i) > 0) {
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| 321 | OPENSSL_free(der);
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| 322 | }
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| 323 | ASN1_item_free(o, i);
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| 324 | }
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| 325 | }
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| 326 |
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| 327 | #ifndef OPENSSL_NO_TS
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| 328 | DO_TEST(TS_REQ, d2i_TS_REQ, i2d_TS_REQ, TS_REQ_print_bio);
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| 329 | DO_TEST(TS_MSG_IMPRINT, d2i_TS_MSG_IMPRINT, i2d_TS_MSG_IMPRINT, TS_MSG_IMPRINT_print_bio);
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| 330 | DO_TEST(TS_RESP, d2i_TS_RESP, i2d_TS_RESP, TS_RESP_print_bio);
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| 331 | DO_TEST(TS_STATUS_INFO, d2i_TS_STATUS_INFO, i2d_TS_STATUS_INFO, TS_STATUS_INFO_print_bio);
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| 332 | DO_TEST(TS_TST_INFO, d2i_TS_TST_INFO, i2d_TS_TST_INFO, TS_TST_INFO_print_bio);
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| 333 | DO_TEST_NO_PRINT(TS_ACCURACY, d2i_TS_ACCURACY, i2d_TS_ACCURACY);
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| 334 | #endif
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| 335 | DO_TEST_NO_PRINT(ESS_ISSUER_SERIAL, d2i_ESS_ISSUER_SERIAL, i2d_ESS_ISSUER_SERIAL);
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| 336 | DO_TEST_NO_PRINT(ESS_CERT_ID, d2i_ESS_CERT_ID, i2d_ESS_CERT_ID);
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| 337 | DO_TEST_NO_PRINT(ESS_SIGNING_CERT, d2i_ESS_SIGNING_CERT, i2d_ESS_SIGNING_CERT);
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| 338 | DO_TEST_NO_PRINT(ESS_CERT_ID_V2, d2i_ESS_CERT_ID_V2, i2d_ESS_CERT_ID_V2);
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| 339 | DO_TEST_NO_PRINT(ESS_SIGNING_CERT_V2, d2i_ESS_SIGNING_CERT_V2, i2d_ESS_SIGNING_CERT_V2);
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| 340 | #if !defined(OPENSSL_NO_DH) && !defined(OPENSSL_NO_DEPRECATED_3_0)
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| 341 | DO_TEST_NO_PRINT(DH, d2i_DHparams, i2d_DHparams);
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| 342 | DO_TEST_NO_PRINT(DH, d2i_DHxparams, i2d_DHxparams);
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| 343 | #endif
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| 344 | #ifndef OPENSSL_NO_DSA
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| 345 | DO_TEST_NO_PRINT(DSA_SIG, d2i_DSA_SIG, i2d_DSA_SIG);
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| 346 | # ifndef OPENSSL_NO_DEPRECATED_3_0
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| 347 | DO_TEST_NO_PRINT(DSA, d2i_DSAPrivateKey, i2d_DSAPrivateKey);
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| 348 | DO_TEST_NO_PRINT(DSA, d2i_DSAPublicKey, i2d_DSAPublicKey);
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| 349 | DO_TEST_NO_PRINT(DSA, d2i_DSAparams, i2d_DSAparams);
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| 350 | # endif
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| 351 | #endif
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| 352 | #ifndef OPENSSL_NO_DEPRECATED_3_0
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| 353 | DO_TEST_NO_PRINT(RSA, d2i_RSAPublicKey, i2d_RSAPublicKey);
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| 354 | #endif
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| 355 | #ifndef OPENSSL_NO_EC
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| 356 | # ifndef OPENSSL_NO_DEPRECATED_3_0
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| 357 | DO_TEST_PRINT_OFFSET(EC_GROUP, d2i_ECPKParameters, i2d_ECPKParameters, ECPKParameters_print);
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| 358 | DO_TEST_PRINT_OFFSET(EC_KEY, d2i_ECPrivateKey, i2d_ECPrivateKey, EC_KEY_print);
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| 359 | DO_TEST(EC_KEY, d2i_ECParameters, i2d_ECParameters, ECParameters_print);
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| 360 | DO_TEST_NO_PRINT(ECDSA_SIG, d2i_ECDSA_SIG, i2d_ECDSA_SIG);
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| 361 | # endif
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| 362 | #endif
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| 363 | DO_TEST_PRINT_PCTX(EVP_PKEY, d2i_AutoPrivateKey, i2d_PrivateKey, EVP_PKEY_print_private);
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| 364 | DO_TEST(SSL_SESSION, d2i_SSL_SESSION, i2d_SSL_SESSION, SSL_SESSION_print);
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| 365 |
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| 366 | ERR_clear_error();
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| 367 |
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| 368 | return 0;
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| 369 | }
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| 370 |
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| 371 | void FuzzerCleanup(void)
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| 372 | {
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| 373 | ASN1_PCTX_free(pctx);
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| 374 | FuzzerClearRand();
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| 375 | }
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