1 | /*
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2 | * Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
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3 | *
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4 | * Licensed under the OpenSSL licenses, (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 | #include <stdio.h>
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19 | #include <string.h>
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20 | #include <openssl/asn1.h>
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21 | #include <openssl/asn1t.h>
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22 | #include <openssl/dh.h>
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23 | #include <openssl/ec.h>
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24 | #include <openssl/ocsp.h>
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25 | #include <openssl/pkcs12.h>
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26 | #include <openssl/rsa.h>
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27 | #include <openssl/ts.h>
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28 | #include <openssl/x509v3.h>
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29 | #include <openssl/cms.h>
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30 | #include <openssl/err.h>
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31 | #include <openssl/rand.h>
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32 | #include <openssl/bio.h>
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33 | #include <openssl/evp.h>
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34 | #include <openssl/ssl.h>
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35 | #include "fuzzer.h"
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36 |
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37 | #include "rand.inc"
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38 |
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39 | static ASN1_ITEM_EXP *item_type[] = {
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40 | ASN1_ITEM_ref(ACCESS_DESCRIPTION),
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41 | #ifndef OPENSSL_NO_RFC3779
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42 | ASN1_ITEM_ref(ASIdentifierChoice),
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43 | ASN1_ITEM_ref(ASIdentifiers),
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44 | ASN1_ITEM_ref(ASIdOrRange),
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45 | #endif
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46 | ASN1_ITEM_ref(ASN1_ANY),
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47 | ASN1_ITEM_ref(ASN1_BIT_STRING),
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48 | ASN1_ITEM_ref(ASN1_BMPSTRING),
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49 | ASN1_ITEM_ref(ASN1_BOOLEAN),
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50 | ASN1_ITEM_ref(ASN1_ENUMERATED),
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51 | ASN1_ITEM_ref(ASN1_FBOOLEAN),
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52 | ASN1_ITEM_ref(ASN1_GENERALIZEDTIME),
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53 | ASN1_ITEM_ref(ASN1_GENERALSTRING),
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54 | ASN1_ITEM_ref(ASN1_IA5STRING),
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55 | ASN1_ITEM_ref(ASN1_INTEGER),
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56 | ASN1_ITEM_ref(ASN1_NULL),
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57 | ASN1_ITEM_ref(ASN1_OBJECT),
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58 | ASN1_ITEM_ref(ASN1_OCTET_STRING),
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59 | ASN1_ITEM_ref(ASN1_OCTET_STRING_NDEF),
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60 | ASN1_ITEM_ref(ASN1_PRINTABLE),
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61 | ASN1_ITEM_ref(ASN1_PRINTABLESTRING),
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62 | ASN1_ITEM_ref(ASN1_SEQUENCE),
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63 | ASN1_ITEM_ref(ASN1_SEQUENCE_ANY),
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64 | ASN1_ITEM_ref(ASN1_SET_ANY),
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65 | ASN1_ITEM_ref(ASN1_T61STRING),
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66 | ASN1_ITEM_ref(ASN1_TBOOLEAN),
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67 | ASN1_ITEM_ref(ASN1_TIME),
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68 | ASN1_ITEM_ref(ASN1_UNIVERSALSTRING),
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69 | ASN1_ITEM_ref(ASN1_UTCTIME),
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70 | ASN1_ITEM_ref(ASN1_UTF8STRING),
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71 | ASN1_ITEM_ref(ASN1_VISIBLESTRING),
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72 | #ifndef OPENSSL_NO_RFC3779
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73 | ASN1_ITEM_ref(ASRange),
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74 | #endif
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75 | ASN1_ITEM_ref(AUTHORITY_INFO_ACCESS),
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76 | ASN1_ITEM_ref(AUTHORITY_KEYID),
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77 | ASN1_ITEM_ref(BASIC_CONSTRAINTS),
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78 | ASN1_ITEM_ref(BIGNUM),
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79 | ASN1_ITEM_ref(CBIGNUM),
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80 | ASN1_ITEM_ref(CERTIFICATEPOLICIES),
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81 | #ifndef OPENSSL_NO_CMS
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82 | ASN1_ITEM_ref(CMS_ContentInfo),
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83 | ASN1_ITEM_ref(CMS_ReceiptRequest),
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84 | ASN1_ITEM_ref(CRL_DIST_POINTS),
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85 | #endif
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86 | #ifndef OPENSSL_NO_DH
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87 | ASN1_ITEM_ref(DHparams),
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88 | #endif
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89 | ASN1_ITEM_ref(DIRECTORYSTRING),
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90 | ASN1_ITEM_ref(DISPLAYTEXT),
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91 | ASN1_ITEM_ref(DIST_POINT),
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92 | ASN1_ITEM_ref(DIST_POINT_NAME),
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93 | #ifndef OPENSSL_NO_EC
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94 | ASN1_ITEM_ref(ECPARAMETERS),
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95 | ASN1_ITEM_ref(ECPKPARAMETERS),
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96 | #endif
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97 | ASN1_ITEM_ref(EDIPARTYNAME),
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98 | ASN1_ITEM_ref(EXTENDED_KEY_USAGE),
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99 | ASN1_ITEM_ref(GENERAL_NAME),
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100 | ASN1_ITEM_ref(GENERAL_NAMES),
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101 | ASN1_ITEM_ref(GENERAL_SUBTREE),
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102 | #ifndef OPENSSL_NO_RFC3779
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103 | ASN1_ITEM_ref(IPAddressChoice),
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104 | ASN1_ITEM_ref(IPAddressFamily),
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105 | ASN1_ITEM_ref(IPAddressOrRange),
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106 | ASN1_ITEM_ref(IPAddressRange),
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107 | #endif
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108 | ASN1_ITEM_ref(ISSUING_DIST_POINT),
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109 | #if OPENSSL_API_COMPAT < 0x10200000L
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110 | ASN1_ITEM_ref(LONG),
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111 | #endif
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112 | ASN1_ITEM_ref(NAME_CONSTRAINTS),
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113 | ASN1_ITEM_ref(NETSCAPE_CERT_SEQUENCE),
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114 | ASN1_ITEM_ref(NETSCAPE_SPKAC),
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115 | ASN1_ITEM_ref(NETSCAPE_SPKI),
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116 | ASN1_ITEM_ref(NOTICEREF),
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117 | #ifndef OPENSSL_NO_OCSP
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118 | ASN1_ITEM_ref(OCSP_BASICRESP),
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119 | ASN1_ITEM_ref(OCSP_CERTID),
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120 | ASN1_ITEM_ref(OCSP_CERTSTATUS),
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121 | ASN1_ITEM_ref(OCSP_CRLID),
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122 | ASN1_ITEM_ref(OCSP_ONEREQ),
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123 | ASN1_ITEM_ref(OCSP_REQINFO),
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124 | ASN1_ITEM_ref(OCSP_REQUEST),
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125 | ASN1_ITEM_ref(OCSP_RESPBYTES),
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126 | ASN1_ITEM_ref(OCSP_RESPDATA),
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127 | ASN1_ITEM_ref(OCSP_RESPID),
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128 | ASN1_ITEM_ref(OCSP_RESPONSE),
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129 | ASN1_ITEM_ref(OCSP_REVOKEDINFO),
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130 | ASN1_ITEM_ref(OCSP_SERVICELOC),
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131 | ASN1_ITEM_ref(OCSP_SIGNATURE),
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132 | ASN1_ITEM_ref(OCSP_SINGLERESP),
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133 | #endif
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134 | ASN1_ITEM_ref(OTHERNAME),
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135 | ASN1_ITEM_ref(PBE2PARAM),
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136 | ASN1_ITEM_ref(PBEPARAM),
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137 | ASN1_ITEM_ref(PBKDF2PARAM),
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138 | ASN1_ITEM_ref(PKCS12),
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139 | ASN1_ITEM_ref(PKCS12_AUTHSAFES),
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140 | ASN1_ITEM_ref(PKCS12_BAGS),
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141 | ASN1_ITEM_ref(PKCS12_MAC_DATA),
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142 | ASN1_ITEM_ref(PKCS12_SAFEBAG),
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143 | ASN1_ITEM_ref(PKCS12_SAFEBAGS),
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144 | ASN1_ITEM_ref(PKCS7),
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145 | ASN1_ITEM_ref(PKCS7_ATTR_SIGN),
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146 | ASN1_ITEM_ref(PKCS7_ATTR_VERIFY),
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147 | ASN1_ITEM_ref(PKCS7_DIGEST),
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148 | ASN1_ITEM_ref(PKCS7_ENC_CONTENT),
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149 | ASN1_ITEM_ref(PKCS7_ENCRYPT),
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150 | ASN1_ITEM_ref(PKCS7_ENVELOPE),
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151 | ASN1_ITEM_ref(PKCS7_ISSUER_AND_SERIAL),
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152 | ASN1_ITEM_ref(PKCS7_RECIP_INFO),
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153 | ASN1_ITEM_ref(PKCS7_SIGNED),
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154 | ASN1_ITEM_ref(PKCS7_SIGN_ENVELOPE),
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155 | ASN1_ITEM_ref(PKCS7_SIGNER_INFO),
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156 | ASN1_ITEM_ref(PKCS8_PRIV_KEY_INFO),
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157 | ASN1_ITEM_ref(PKEY_USAGE_PERIOD),
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158 | ASN1_ITEM_ref(POLICY_CONSTRAINTS),
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159 | ASN1_ITEM_ref(POLICYINFO),
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160 | ASN1_ITEM_ref(POLICY_MAPPING),
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161 | ASN1_ITEM_ref(POLICY_MAPPINGS),
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162 | ASN1_ITEM_ref(POLICYQUALINFO),
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163 | ASN1_ITEM_ref(PROXY_CERT_INFO_EXTENSION),
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164 | ASN1_ITEM_ref(PROXY_POLICY),
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165 | ASN1_ITEM_ref(RSA_OAEP_PARAMS),
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166 | ASN1_ITEM_ref(RSAPrivateKey),
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167 | ASN1_ITEM_ref(RSA_PSS_PARAMS),
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168 | ASN1_ITEM_ref(RSAPublicKey),
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169 | ASN1_ITEM_ref(SXNET),
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170 | ASN1_ITEM_ref(SXNETID),
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171 | ASN1_ITEM_ref(USERNOTICE),
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172 | ASN1_ITEM_ref(X509),
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173 | ASN1_ITEM_ref(X509_ALGOR),
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174 | ASN1_ITEM_ref(X509_ALGORS),
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175 | ASN1_ITEM_ref(X509_ATTRIBUTE),
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176 | ASN1_ITEM_ref(X509_CERT_AUX),
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177 | ASN1_ITEM_ref(X509_CINF),
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178 | ASN1_ITEM_ref(X509_CRL),
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179 | ASN1_ITEM_ref(X509_CRL_INFO),
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180 | ASN1_ITEM_ref(X509_EXTENSION),
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181 | ASN1_ITEM_ref(X509_EXTENSIONS),
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182 | ASN1_ITEM_ref(X509_NAME),
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183 | ASN1_ITEM_ref(X509_NAME_ENTRY),
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184 | ASN1_ITEM_ref(X509_PUBKEY),
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185 | ASN1_ITEM_ref(X509_REQ),
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186 | ASN1_ITEM_ref(X509_REQ_INFO),
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187 | ASN1_ITEM_ref(X509_REVOKED),
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188 | ASN1_ITEM_ref(X509_SIG),
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189 | ASN1_ITEM_ref(X509_VAL),
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190 | #if OPENSSL_API_COMPAT < 0x10200000L
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191 | ASN1_ITEM_ref(ZLONG),
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192 | #endif
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193 | ASN1_ITEM_ref(INT32),
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194 | ASN1_ITEM_ref(ZINT32),
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195 | ASN1_ITEM_ref(UINT32),
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196 | ASN1_ITEM_ref(ZUINT32),
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197 | ASN1_ITEM_ref(INT64),
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198 | ASN1_ITEM_ref(ZINT64),
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199 | ASN1_ITEM_ref(UINT64),
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200 | ASN1_ITEM_ref(ZUINT64),
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201 | NULL
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202 | };
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203 |
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204 | static ASN1_PCTX *pctx;
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205 |
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206 | #define DO_TEST(TYPE, D2I, I2D, PRINT) { \
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207 | const unsigned char *p = buf; \
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208 | unsigned char *der = NULL; \
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209 | TYPE *type = D2I(NULL, &p, len); \
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210 | \
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211 | if (type != NULL) { \
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212 | int len2; \
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213 | BIO *bio = BIO_new(BIO_s_null()); \
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214 | \
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215 | PRINT(bio, type); \
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216 | BIO_free(bio); \
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217 | len2 = I2D(type, &der); \
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218 | if (len2 != 0) {} \
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219 | OPENSSL_free(der); \
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220 | TYPE ## _free(type); \
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221 | } \
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222 | }
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223 |
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224 | #define DO_TEST_PRINT_OFFSET(TYPE, D2I, I2D, PRINT) { \
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225 | const unsigned char *p = buf; \
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226 | unsigned char *der = NULL; \
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227 | TYPE *type = D2I(NULL, &p, len); \
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228 | \
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229 | if (type != NULL) { \
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230 | BIO *bio = BIO_new(BIO_s_null()); \
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231 | \
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232 | PRINT(bio, type, 0); \
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233 | BIO_free(bio); \
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234 | I2D(type, &der); \
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235 | OPENSSL_free(der); \
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236 | TYPE ## _free(type); \
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237 | } \
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238 | }
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239 |
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240 | #define DO_TEST_PRINT_PCTX(TYPE, D2I, I2D, PRINT) { \
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241 | const unsigned char *p = buf; \
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242 | unsigned char *der = NULL; \
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243 | TYPE *type = D2I(NULL, &p, len); \
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244 | \
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245 | if (type != NULL) { \
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246 | BIO *bio = BIO_new(BIO_s_null()); \
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247 | \
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248 | PRINT(bio, type, 0, pctx); \
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249 | BIO_free(bio); \
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250 | I2D(type, &der); \
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251 | OPENSSL_free(der); \
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252 | TYPE ## _free(type); \
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253 | } \
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254 | }
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255 |
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256 |
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257 | #define DO_TEST_NO_PRINT(TYPE, D2I, I2D) { \
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258 | const unsigned char *p = buf; \
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259 | unsigned char *der = NULL; \
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260 | TYPE *type = D2I(NULL, &p, len); \
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261 | \
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262 | if (type != NULL) { \
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263 | BIO *bio = BIO_new(BIO_s_null()); \
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264 | \
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265 | BIO_free(bio); \
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266 | I2D(type, &der); \
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267 | OPENSSL_free(der); \
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268 | TYPE ## _free(type); \
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269 | } \
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270 | }
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271 |
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272 |
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273 | int FuzzerInitialize(int *argc, char ***argv)
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274 | {
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275 | pctx = ASN1_PCTX_new();
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276 | ASN1_PCTX_set_flags(pctx, ASN1_PCTX_FLAGS_SHOW_ABSENT |
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277 | ASN1_PCTX_FLAGS_SHOW_SEQUENCE | ASN1_PCTX_FLAGS_SHOW_SSOF |
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278 | ASN1_PCTX_FLAGS_SHOW_TYPE | ASN1_PCTX_FLAGS_SHOW_FIELD_STRUCT_NAME);
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279 | ASN1_PCTX_set_str_flags(pctx, ASN1_STRFLGS_UTF8_CONVERT |
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280 | ASN1_STRFLGS_SHOW_TYPE | ASN1_STRFLGS_DUMP_ALL);
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281 |
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282 | OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CRYPTO_STRINGS, NULL);
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283 | OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS, NULL);
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284 | ERR_get_state();
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285 | CRYPTO_free_ex_index(0, -1);
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286 | FuzzerSetRand();
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287 |
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288 | return 1;
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289 | }
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290 |
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291 | int FuzzerTestOneInput(const uint8_t *buf, size_t len)
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292 | {
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293 | int n;
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294 |
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295 |
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296 | for (n = 0; item_type[n] != NULL; ++n) {
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297 | const uint8_t *b = buf;
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298 | unsigned char *der = NULL;
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299 | const ASN1_ITEM *i = ASN1_ITEM_ptr(item_type[n]);
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300 | ASN1_VALUE *o = ASN1_item_d2i(NULL, &b, len, i);
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301 |
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302 | if (o != NULL) {
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303 | BIO *bio = BIO_new(BIO_s_null());
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304 |
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305 | ASN1_item_print(bio, o, 4, i, pctx);
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306 | BIO_free(bio);
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307 | ASN1_item_i2d(o, &der, i);
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308 | OPENSSL_free(der);
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309 | ASN1_item_free(o, i);
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310 | }
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311 | }
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312 |
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313 | #ifndef OPENSSL_NO_TS
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314 | DO_TEST(TS_REQ, d2i_TS_REQ, i2d_TS_REQ, TS_REQ_print_bio);
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315 | DO_TEST(TS_MSG_IMPRINT, d2i_TS_MSG_IMPRINT, i2d_TS_MSG_IMPRINT, TS_MSG_IMPRINT_print_bio);
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316 | DO_TEST(TS_RESP, d2i_TS_RESP, i2d_TS_RESP, TS_RESP_print_bio);
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317 | DO_TEST(TS_STATUS_INFO, d2i_TS_STATUS_INFO, i2d_TS_STATUS_INFO, TS_STATUS_INFO_print_bio);
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318 | DO_TEST(TS_TST_INFO, d2i_TS_TST_INFO, i2d_TS_TST_INFO, TS_TST_INFO_print_bio);
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319 | DO_TEST_NO_PRINT(TS_ACCURACY, d2i_TS_ACCURACY, i2d_TS_ACCURACY);
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320 | DO_TEST_NO_PRINT(ESS_ISSUER_SERIAL, d2i_ESS_ISSUER_SERIAL, i2d_ESS_ISSUER_SERIAL);
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321 | DO_TEST_NO_PRINT(ESS_CERT_ID, d2i_ESS_CERT_ID, i2d_ESS_CERT_ID);
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322 | DO_TEST_NO_PRINT(ESS_SIGNING_CERT, d2i_ESS_SIGNING_CERT, i2d_ESS_SIGNING_CERT);
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323 | #endif
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324 | #ifndef OPENSSL_NO_DH
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325 | DO_TEST(DH, d2i_DHparams, i2d_DHparams, DHparams_print);
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326 | DO_TEST(DH, d2i_DHxparams, i2d_DHxparams, DHparams_print);
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327 | #endif
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328 | #ifndef OPENSSL_NO_DSA
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329 | DO_TEST_NO_PRINT(DSA_SIG, d2i_DSA_SIG, i2d_DSA_SIG);
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330 | DO_TEST_PRINT_OFFSET(DSA, d2i_DSAPrivateKey, i2d_DSAPrivateKey, DSA_print);
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331 | DO_TEST_PRINT_OFFSET(DSA, d2i_DSAPublicKey, i2d_DSAPublicKey, DSA_print);
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332 | DO_TEST(DSA, d2i_DSAparams, i2d_DSAparams, DSAparams_print);
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333 | #endif
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334 | DO_TEST_PRINT_OFFSET(RSA, d2i_RSAPublicKey, i2d_RSAPublicKey, RSA_print);
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335 | #ifndef OPENSSL_NO_EC
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336 | DO_TEST_PRINT_OFFSET(EC_GROUP, d2i_ECPKParameters, i2d_ECPKParameters, ECPKParameters_print);
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337 | DO_TEST_PRINT_OFFSET(EC_KEY, d2i_ECPrivateKey, i2d_ECPrivateKey, EC_KEY_print);
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338 | DO_TEST(EC_KEY, d2i_ECParameters, i2d_ECParameters, ECParameters_print);
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339 | DO_TEST_NO_PRINT(ECDSA_SIG, d2i_ECDSA_SIG, i2d_ECDSA_SIG);
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340 | #endif
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341 | DO_TEST_PRINT_PCTX(EVP_PKEY, d2i_AutoPrivateKey, i2d_PrivateKey, EVP_PKEY_print_private);
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342 | DO_TEST(SSL_SESSION, d2i_SSL_SESSION, i2d_SSL_SESSION, SSL_SESSION_print);
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343 |
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344 | ERR_clear_error();
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345 |
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346 | return 0;
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347 | }
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348 |
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349 | void FuzzerCleanup(void)
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350 | {
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351 | ASN1_PCTX_free(pctx);
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352 | }
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