1 | /***************************************************************************
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2 | * _ _ ____ _
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3 | * Project ___| | | | _ \| |
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4 | * / __| | | | |_) | |
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5 | * | (__| |_| | _ <| |___
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6 | * \___|\___/|_| \_\_____|
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7 | *
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8 | * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
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9 | *
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10 | * This software is licensed as described in the file COPYING, which
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11 | * you should have received as part of this distribution. The terms
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12 | * are also available at https://curl.haxx.se/docs/copyright.html.
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13 | *
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14 | * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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15 | * copies of the Software, and permit persons to whom the Software is
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16 | * furnished to do so, under the terms of the COPYING file.
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17 | *
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18 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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19 | * KIND, either express or implied.
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20 | *
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21 | ***************************************************************************/
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22 |
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23 | #include "curl_setup.h"
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24 |
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25 | #if defined(USE_GSKIT) || defined(USE_NSS) || defined(USE_GNUTLS) || \
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26 | defined(USE_CYASSL)
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27 |
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28 | #include <curl/curl.h>
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29 | #include "urldata.h"
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30 | #include "strequal.h"
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31 | #include "hostcheck.h"
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32 | #include "vtls/vtls.h"
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33 | #include "sendf.h"
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34 | #include "inet_pton.h"
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35 | #include "curl_base64.h"
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36 | #include "x509asn1.h"
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37 | #include "curl_printf.h"
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38 | #include "curl_memory.h"
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39 | /* The last #include file should be: */
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40 | #include "memdebug.h"
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41 |
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42 |
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43 | /* ASN.1 OIDs. */
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44 | static const char cnOID[] = "2.5.4.3"; /* Common name. */
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45 | static const char sanOID[] = "2.5.29.17"; /* Subject alternative name. */
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46 |
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47 | static const curl_OID OIDtable[] = {
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48 | { "1.2.840.10040.4.1", "dsa" },
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49 | { "1.2.840.10040.4.3", "dsa-with-sha1" },
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50 | { "1.2.840.10045.2.1", "ecPublicKey" },
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51 | { "1.2.840.10045.3.0.1", "c2pnb163v1" },
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52 | { "1.2.840.10045.4.1", "ecdsa-with-SHA1" },
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53 | { "1.2.840.10046.2.1", "dhpublicnumber" },
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54 | { "1.2.840.113549.1.1.1", "rsaEncryption" },
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55 | { "1.2.840.113549.1.1.2", "md2WithRSAEncryption" },
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56 | { "1.2.840.113549.1.1.4", "md5WithRSAEncryption" },
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57 | { "1.2.840.113549.1.1.5", "sha1WithRSAEncryption" },
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58 | { "1.2.840.113549.1.1.10", "RSASSA-PSS" },
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59 | { "1.2.840.113549.1.1.14", "sha224WithRSAEncryption" },
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60 | { "1.2.840.113549.1.1.11", "sha256WithRSAEncryption" },
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61 | { "1.2.840.113549.1.1.12", "sha384WithRSAEncryption" },
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62 | { "1.2.840.113549.1.1.13", "sha512WithRSAEncryption" },
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63 | { "1.2.840.113549.2.2", "md2" },
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64 | { "1.2.840.113549.2.5", "md5" },
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65 | { "1.3.14.3.2.26", "sha1" },
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66 | { cnOID, "CN" },
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67 | { "2.5.4.4", "SN" },
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68 | { "2.5.4.5", "serialNumber" },
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69 | { "2.5.4.6", "C" },
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70 | { "2.5.4.7", "L" },
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71 | { "2.5.4.8", "ST" },
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72 | { "2.5.4.9", "streetAddress" },
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73 | { "2.5.4.10", "O" },
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74 | { "2.5.4.11", "OU" },
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75 | { "2.5.4.12", "title" },
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76 | { "2.5.4.13", "description" },
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77 | { "2.5.4.17", "postalCode" },
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78 | { "2.5.4.41", "name" },
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79 | { "2.5.4.42", "givenName" },
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80 | { "2.5.4.43", "initials" },
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81 | { "2.5.4.44", "generationQualifier" },
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82 | { "2.5.4.45", "X500UniqueIdentifier" },
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83 | { "2.5.4.46", "dnQualifier" },
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84 | { "2.5.4.65", "pseudonym" },
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85 | { "1.2.840.113549.1.9.1", "emailAddress" },
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86 | { "2.5.4.72", "role" },
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87 | { sanOID, "subjectAltName" },
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88 | { "2.5.29.18", "issuerAltName" },
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89 | { "2.5.29.19", "basicConstraints" },
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90 | { "2.16.840.1.101.3.4.2.4", "sha224" },
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91 | { "2.16.840.1.101.3.4.2.1", "sha256" },
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92 | { "2.16.840.1.101.3.4.2.2", "sha384" },
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93 | { "2.16.840.1.101.3.4.2.3", "sha512" },
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94 | { (const char *) NULL, (const char *) NULL }
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95 | };
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96 |
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97 | /*
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98 | * Lightweight ASN.1 parser.
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99 | * In particular, it does not check for syntactic/lexical errors.
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100 | * It is intended to support certificate information gathering for SSL backends
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101 | * that offer a mean to get certificates as a whole, but do not supply
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102 | * entry points to get particular certificate sub-fields.
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103 | * Please note there is no pretention here to rewrite a full SSL library.
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104 | */
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105 |
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106 |
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107 | const char * Curl_getASN1Element(curl_asn1Element * elem,
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108 | const char * beg, const char * end)
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109 | {
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110 | unsigned char b;
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111 | unsigned long len;
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112 | curl_asn1Element lelem;
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113 |
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114 | /* Get a single ASN.1 element into `elem', parse ASN.1 string at `beg'
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115 | ending at `end'.
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116 | Returns a pointer in source string after the parsed element, or NULL
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117 | if an error occurs. */
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118 |
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119 | if(beg >= end || !*beg)
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120 | return (const char *) NULL;
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121 |
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122 | /* Process header byte. */
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123 | elem->header = beg;
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124 | b = (unsigned char) *beg++;
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125 | elem->constructed = (b & 0x20) != 0;
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126 | elem->class = (b >> 6) & 3;
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127 | b &= 0x1F;
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128 | if(b == 0x1F)
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129 | return (const char *) NULL; /* Long tag values not supported here. */
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130 | elem->tag = b;
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131 |
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132 | /* Process length. */
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133 | if(beg >= end)
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134 | return (const char *) NULL;
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135 | b = (unsigned char) *beg++;
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136 | if(!(b & 0x80))
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137 | len = b;
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138 | else if(!(b &= 0x7F)) {
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139 | /* Unspecified length. Since we have all the data, we can determine the
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140 | effective length by skipping element until an end element is found. */
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141 | if(!elem->constructed)
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142 | return (const char *) NULL;
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143 | elem->beg = beg;
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144 | while(beg < end && *beg) {
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145 | beg = Curl_getASN1Element(&lelem, beg, end);
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146 | if(!beg)
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147 | return (const char *) NULL;
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148 | }
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149 | if(beg >= end)
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150 | return (const char *) NULL;
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151 | elem->end = beg;
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152 | return beg + 1;
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153 | }
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154 | else if(beg + b > end)
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155 | return (const char *) NULL; /* Does not fit in source. */
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156 | else {
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157 | /* Get long length. */
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158 | len = 0;
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159 | do {
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160 | if(len & 0xFF000000L)
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161 | return (const char *) NULL; /* Lengths > 32 bits are not supported. */
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162 | len = (len << 8) | (unsigned char) *beg++;
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163 | } while(--b);
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164 | }
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165 | if((unsigned long) (end - beg) < len)
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166 | return (const char *) NULL; /* Element data does not fit in source. */
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167 | elem->beg = beg;
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168 | elem->end = beg + len;
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169 | return elem->end;
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170 | }
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171 |
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172 | static const curl_OID * searchOID(const char * oid)
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173 | {
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174 | const curl_OID * op;
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175 |
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176 | /* Search the null terminated OID or OID identifier in local table.
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177 | Return the table entry pointer or NULL if not found. */
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178 |
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179 | for(op = OIDtable; op->numoid; op++)
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180 | if(!strcmp(op->numoid, oid) || curl_strequal(op->textoid, oid))
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181 | return op;
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182 |
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183 | return (const curl_OID *) NULL;
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184 | }
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185 |
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186 | static const char * bool2str(const char * beg, const char * end)
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187 | {
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188 | /* Convert an ASN.1 Boolean value into its string representation.
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189 | Return the dynamically allocated string, or NULL if source is not an
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190 | ASN.1 Boolean value. */
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191 |
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192 | if(end - beg != 1)
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193 | return (const char *) NULL;
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194 | return strdup(*beg? "TRUE": "FALSE");
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195 | }
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196 |
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197 | static const char * octet2str(const char * beg, const char * end)
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198 | {
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199 | size_t n = end - beg;
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200 | char * buf;
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201 |
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202 | /* Convert an ASN.1 octet string to a printable string.
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203 | Return the dynamically allocated string, or NULL if an error occurs. */
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204 |
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205 | buf = malloc(3 * n + 1);
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206 | if(buf)
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207 | for(n = 0; beg < end; n += 3)
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208 | snprintf(buf + n, 4, "%02x:", *(const unsigned char *) beg++);
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209 | return buf;
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210 | }
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211 |
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212 | static const char * bit2str(const char * beg, const char * end)
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213 | {
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214 | /* Convert an ASN.1 bit string to a printable string.
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215 | Return the dynamically allocated string, or NULL if an error occurs. */
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216 |
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217 | if(++beg > end)
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218 | return (const char *) NULL;
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219 | return octet2str(beg, end);
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220 | }
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221 |
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222 | static const char * int2str(const char * beg, const char * end)
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223 | {
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224 | long val = 0;
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225 | size_t n = end - beg;
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226 |
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227 | /* Convert an ASN.1 integer value into its string representation.
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228 | Return the dynamically allocated string, or NULL if source is not an
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229 | ASN.1 integer value. */
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230 |
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231 | if(!n)
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232 | return (const char *) NULL;
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233 |
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234 | if(n > 4)
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235 | return octet2str(beg, end);
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236 |
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237 | /* Represent integers <= 32-bit as a single value. */
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238 | if(*beg & 0x80)
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239 | val = ~val;
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240 |
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241 | do
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242 | val = (val << 8) | *(const unsigned char *) beg++;
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243 | while(beg < end);
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244 | return curl_maprintf("%s%lx", (val < 0 || val >= 10)? "0x": "", val);
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245 | }
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246 |
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247 | static ssize_t
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248 | utf8asn1str(char * * to, int type, const char * from, const char * end)
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249 | {
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250 | size_t inlength = end - from;
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251 | int size = 1;
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252 | size_t outlength;
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253 | int charsize;
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254 | unsigned int wc;
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255 | char * buf;
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256 |
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257 | /* Perform a lazy conversion from an ASN.1 typed string to UTF8. Allocate the
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258 | destination buffer dynamically. The allocation size will normally be too
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259 | large: this is to avoid buffer overflows.
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260 | Terminate the string with a nul byte and return the converted
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261 | string length. */
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262 |
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263 | *to = (char *) NULL;
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264 | switch (type) {
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265 | case CURL_ASN1_BMP_STRING:
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266 | size = 2;
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267 | break;
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268 | case CURL_ASN1_UNIVERSAL_STRING:
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269 | size = 4;
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270 | break;
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271 | case CURL_ASN1_NUMERIC_STRING:
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272 | case CURL_ASN1_PRINTABLE_STRING:
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273 | case CURL_ASN1_TELETEX_STRING:
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274 | case CURL_ASN1_IA5_STRING:
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275 | case CURL_ASN1_VISIBLE_STRING:
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276 | case CURL_ASN1_UTF8_STRING:
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277 | break;
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278 | default:
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279 | return -1; /* Conversion not supported. */
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280 | }
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281 |
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282 | if(inlength % size)
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283 | return -1; /* Length inconsistent with character size. */
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284 | buf = malloc(4 * (inlength / size) + 1);
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285 | if(!buf)
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286 | return -1; /* Not enough memory. */
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287 |
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288 | if(type == CURL_ASN1_UTF8_STRING) {
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289 | /* Just copy. */
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290 | outlength = inlength;
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291 | if(outlength)
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292 | memcpy(buf, from, outlength);
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293 | }
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294 | else {
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295 | for(outlength = 0; from < end;) {
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296 | wc = 0;
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297 | switch (size) {
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298 | case 4:
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299 | wc = (wc << 8) | *(const unsigned char *) from++;
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300 | wc = (wc << 8) | *(const unsigned char *) from++;
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301 | /* fallthrough */
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302 | case 2:
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303 | wc = (wc << 8) | *(const unsigned char *) from++;
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304 | /* fallthrough */
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305 | default: /* case 1: */
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306 | wc = (wc << 8) | *(const unsigned char *) from++;
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307 | }
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308 | charsize = 1;
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309 | if(wc >= 0x00000080) {
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310 | if(wc >= 0x00000800) {
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311 | if(wc >= 0x00010000) {
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312 | if(wc >= 0x00200000) {
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313 | free(buf);
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314 | return -1; /* Invalid char. size for target encoding. */
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315 | }
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316 | buf[outlength + 3] = (char) (0x80 | (wc & 0x3F));
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317 | wc = (wc >> 6) | 0x00010000;
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318 | charsize++;
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319 | }
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320 | buf[outlength + 2] = (char) (0x80 | (wc & 0x3F));
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321 | wc = (wc >> 6) | 0x00000800;
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322 | charsize++;
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323 | }
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324 | buf[outlength + 1] = (char) (0x80 | (wc & 0x3F));
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325 | wc = (wc >> 6) | 0x000000C0;
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326 | charsize++;
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327 | }
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328 | buf[outlength] = (char) wc;
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329 | outlength += charsize;
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330 | }
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331 | }
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332 | buf[outlength] = '\0';
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333 | *to = buf;
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334 | return outlength;
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335 | }
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336 |
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337 | static const char * string2str(int type, const char * beg, const char * end)
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338 | {
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339 | char * buf;
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340 |
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341 | /* Convert an ASN.1 String into its UTF-8 string representation.
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342 | Return the dynamically allocated string, or NULL if an error occurs. */
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343 |
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344 | if(utf8asn1str(&buf, type, beg, end) < 0)
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345 | return (const char *) NULL;
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346 | return buf;
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347 | }
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348 |
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349 | static int encodeUint(char * buf, int n, unsigned int x)
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350 | {
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351 | int i = 0;
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352 | unsigned int y = x / 10;
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353 |
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354 | /* Decimal ASCII encode unsigned integer `x' in the `n'-byte buffer at `buf'.
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355 | Return the total number of encoded digits, even if larger than `n'. */
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356 |
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357 | if(y) {
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358 | i += encodeUint(buf, n, y);
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359 | x -= y * 10;
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360 | }
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361 | if(i < n)
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362 | buf[i] = (char) ('0' + x);
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363 | i++;
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364 | if(i < n)
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365 | buf[i] = '\0'; /* Store a terminator if possible. */
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366 | return i;
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367 | }
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368 |
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369 | static int encodeOID(char * buf, int n, const char * beg, const char * end)
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370 | {
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371 | int i = 0;
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372 | unsigned int x;
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373 | unsigned int y;
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374 |
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375 | /* Convert an ASN.1 OID into its dotted string representation.
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376 | Store the result in th `n'-byte buffer at `buf'.
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377 | Return the converted string length, or -1 if an error occurs. */
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378 |
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379 | /* Process the first two numbers. */
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380 | y = *(const unsigned char *) beg++;
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381 | x = y / 40;
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382 | y -= x * 40;
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383 | i += encodeUint(buf + i, n - i, x);
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384 | if(i < n)
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385 | buf[i] = '.';
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386 | i++;
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387 | i += encodeUint(buf + i, n - i, y);
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388 |
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389 | /* Process the trailing numbers. */
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390 | while(beg < end) {
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391 | if(i < n)
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392 | buf[i] = '.';
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393 | i++;
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394 | x = 0;
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395 | do {
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396 | if(x & 0xFF000000)
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397 | return -1;
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398 | y = *(const unsigned char *) beg++;
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399 | x = (x << 7) | (y & 0x7F);
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400 | } while(y & 0x80);
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401 | i += encodeUint(buf + i, n - i, x);
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402 | }
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403 | if(i < n)
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404 | buf[i] = '\0';
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405 | return i;
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406 | }
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407 |
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408 | static const char * OID2str(const char * beg, const char * end, bool symbolic)
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409 | {
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410 | char * buf = (char *) NULL;
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411 | const curl_OID * op;
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412 | int n;
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413 |
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414 | /* Convert an ASN.1 OID into its dotted or symbolic string representation.
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415 | Return the dynamically allocated string, or NULL if an error occurs. */
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416 |
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417 | if(beg < end) {
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418 | n = encodeOID((char *) NULL, -1, beg, end);
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419 | if(n >= 0) {
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420 | buf = malloc(n + 1);
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421 | if(buf) {
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422 | encodeOID(buf, n, beg, end);
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423 | buf[n] = '\0';
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424 |
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425 | if(symbolic) {
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426 | op = searchOID(buf);
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427 | if(op) {
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428 | free(buf);
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429 | buf = strdup(op->textoid);
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430 | }
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431 | }
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432 | }
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433 | }
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434 | }
|
---|
435 | return buf;
|
---|
436 | }
|
---|
437 |
|
---|
438 | static const char * GTime2str(const char * beg, const char * end)
|
---|
439 | {
|
---|
440 | const char * tzp;
|
---|
441 | const char * fracp;
|
---|
442 | char sec1, sec2;
|
---|
443 | size_t fracl;
|
---|
444 | size_t tzl;
|
---|
445 | const char * sep = "";
|
---|
446 |
|
---|
447 | /* Convert an ASN.1 Generalized time to a printable string.
|
---|
448 | Return the dynamically allocated string, or NULL if an error occurs. */
|
---|
449 |
|
---|
450 | for(fracp = beg; fracp < end && *fracp >= '0' && *fracp <= '9'; fracp++)
|
---|
451 | ;
|
---|
452 |
|
---|
453 | /* Get seconds digits. */
|
---|
454 | sec1 = '0';
|
---|
455 | switch (fracp - beg - 12) {
|
---|
456 | case 0:
|
---|
457 | sec2 = '0';
|
---|
458 | break;
|
---|
459 | case 2:
|
---|
460 | sec1 = fracp[-2];
|
---|
461 | case 1:
|
---|
462 | sec2 = fracp[-1];
|
---|
463 | break;
|
---|
464 | default:
|
---|
465 | return (const char *) NULL;
|
---|
466 | }
|
---|
467 |
|
---|
468 | /* Scan for timezone, measure fractional seconds. */
|
---|
469 | tzp = fracp;
|
---|
470 | fracl = 0;
|
---|
471 | if(fracp < end && (*fracp == '.' || *fracp == ',')) {
|
---|
472 | fracp++;
|
---|
473 | do
|
---|
474 | tzp++;
|
---|
475 | while(tzp < end && *tzp >= '0' && *tzp <= '9');
|
---|
476 | /* Strip leading zeroes in fractional seconds. */
|
---|
477 | for(fracl = tzp - fracp - 1; fracl && fracp[fracl - 1] == '0'; fracl--)
|
---|
478 | ;
|
---|
479 | }
|
---|
480 |
|
---|
481 | /* Process timezone. */
|
---|
482 | if(tzp >= end)
|
---|
483 | ; /* Nothing to do. */
|
---|
484 | else if(*tzp == 'Z') {
|
---|
485 | tzp = " GMT";
|
---|
486 | end = tzp + 4;
|
---|
487 | }
|
---|
488 | else {
|
---|
489 | sep = " ";
|
---|
490 | tzp++;
|
---|
491 | }
|
---|
492 |
|
---|
493 | tzl = end - tzp;
|
---|
494 | return curl_maprintf("%.4s-%.2s-%.2s %.2s:%.2s:%c%c%s%.*s%s%.*s",
|
---|
495 | beg, beg + 4, beg + 6,
|
---|
496 | beg + 8, beg + 10, sec1, sec2,
|
---|
497 | fracl? ".": "", fracl, fracp,
|
---|
498 | sep, tzl, tzp);
|
---|
499 | }
|
---|
500 |
|
---|
501 | static const char * UTime2str(const char * beg, const char * end)
|
---|
502 | {
|
---|
503 | const char * tzp;
|
---|
504 | size_t tzl;
|
---|
505 | const char * sec;
|
---|
506 |
|
---|
507 | /* Convert an ASN.1 UTC time to a printable string.
|
---|
508 | Return the dynamically allocated string, or NULL if an error occurs. */
|
---|
509 |
|
---|
510 | for(tzp = beg; tzp < end && *tzp >= '0' && *tzp <= '9'; tzp++)
|
---|
511 | ;
|
---|
512 | /* Get the seconds. */
|
---|
513 | sec = beg + 10;
|
---|
514 | switch (tzp - sec) {
|
---|
515 | case 0:
|
---|
516 | sec = "00";
|
---|
517 | case 2:
|
---|
518 | break;
|
---|
519 | default:
|
---|
520 | return (const char *) NULL;
|
---|
521 | }
|
---|
522 |
|
---|
523 | /* Process timezone. */
|
---|
524 | if(tzp >= end)
|
---|
525 | return (const char *) NULL;
|
---|
526 | if(*tzp == 'Z') {
|
---|
527 | tzp = "GMT";
|
---|
528 | end = tzp + 3;
|
---|
529 | }
|
---|
530 | else
|
---|
531 | tzp++;
|
---|
532 |
|
---|
533 | tzl = end - tzp;
|
---|
534 | return curl_maprintf("%u%.2s-%.2s-%.2s %.2s:%.2s:%.2s %.*s",
|
---|
535 | 20 - (*beg >= '5'), beg, beg + 2, beg + 4,
|
---|
536 | beg + 6, beg + 8, sec,
|
---|
537 | tzl, tzp);
|
---|
538 | }
|
---|
539 |
|
---|
540 | const char * Curl_ASN1tostr(curl_asn1Element * elem, int type)
|
---|
541 | {
|
---|
542 | /* Convert an ASN.1 element to a printable string.
|
---|
543 | Return the dynamically allocated string, or NULL if an error occurs. */
|
---|
544 |
|
---|
545 | if(elem->constructed)
|
---|
546 | return (const char *) NULL; /* No conversion of structured elements. */
|
---|
547 |
|
---|
548 | if(!type)
|
---|
549 | type = elem->tag; /* Type not forced: use element tag as type. */
|
---|
550 |
|
---|
551 | switch (type) {
|
---|
552 | case CURL_ASN1_BOOLEAN:
|
---|
553 | return bool2str(elem->beg, elem->end);
|
---|
554 | case CURL_ASN1_INTEGER:
|
---|
555 | case CURL_ASN1_ENUMERATED:
|
---|
556 | return int2str(elem->beg, elem->end);
|
---|
557 | case CURL_ASN1_BIT_STRING:
|
---|
558 | return bit2str(elem->beg, elem->end);
|
---|
559 | case CURL_ASN1_OCTET_STRING:
|
---|
560 | return octet2str(elem->beg, elem->end);
|
---|
561 | case CURL_ASN1_NULL:
|
---|
562 | return strdup("");
|
---|
563 | case CURL_ASN1_OBJECT_IDENTIFIER:
|
---|
564 | return OID2str(elem->beg, elem->end, TRUE);
|
---|
565 | case CURL_ASN1_UTC_TIME:
|
---|
566 | return UTime2str(elem->beg, elem->end);
|
---|
567 | case CURL_ASN1_GENERALIZED_TIME:
|
---|
568 | return GTime2str(elem->beg, elem->end);
|
---|
569 | case CURL_ASN1_UTF8_STRING:
|
---|
570 | case CURL_ASN1_NUMERIC_STRING:
|
---|
571 | case CURL_ASN1_PRINTABLE_STRING:
|
---|
572 | case CURL_ASN1_TELETEX_STRING:
|
---|
573 | case CURL_ASN1_IA5_STRING:
|
---|
574 | case CURL_ASN1_VISIBLE_STRING:
|
---|
575 | case CURL_ASN1_UNIVERSAL_STRING:
|
---|
576 | case CURL_ASN1_BMP_STRING:
|
---|
577 | return string2str(type, elem->beg, elem->end);
|
---|
578 | }
|
---|
579 |
|
---|
580 | return (const char *) NULL; /* Unsupported. */
|
---|
581 | }
|
---|
582 |
|
---|
583 | static ssize_t encodeDN(char * buf, size_t n, curl_asn1Element * dn)
|
---|
584 | {
|
---|
585 | curl_asn1Element rdn;
|
---|
586 | curl_asn1Element atv;
|
---|
587 | curl_asn1Element oid;
|
---|
588 | curl_asn1Element value;
|
---|
589 | size_t l = 0;
|
---|
590 | const char * p1;
|
---|
591 | const char * p2;
|
---|
592 | const char * p3;
|
---|
593 | const char * str;
|
---|
594 |
|
---|
595 | /* ASCII encode distinguished name at `dn' into the `n'-byte buffer at `buf'.
|
---|
596 | Return the total string length, even if larger than `n'. */
|
---|
597 |
|
---|
598 | for(p1 = dn->beg; p1 < dn->end;) {
|
---|
599 | p1 = Curl_getASN1Element(&rdn, p1, dn->end);
|
---|
600 | for(p2 = rdn.beg; p2 < rdn.end;) {
|
---|
601 | p2 = Curl_getASN1Element(&atv, p2, rdn.end);
|
---|
602 | p3 = Curl_getASN1Element(&oid, atv.beg, atv.end);
|
---|
603 | Curl_getASN1Element(&value, p3, atv.end);
|
---|
604 | str = Curl_ASN1tostr(&oid, 0);
|
---|
605 | if(!str)
|
---|
606 | return -1;
|
---|
607 |
|
---|
608 | /* Encode delimiter.
|
---|
609 | If attribute has a short uppercase name, delimiter is ", ". */
|
---|
610 | if(l) {
|
---|
611 | for(p3 = str; isupper(*p3); p3++)
|
---|
612 | ;
|
---|
613 | for(p3 = (*p3 || p3 - str > 2)? "/": ", "; *p3; p3++) {
|
---|
614 | if(l < n)
|
---|
615 | buf[l] = *p3;
|
---|
616 | l++;
|
---|
617 | }
|
---|
618 | }
|
---|
619 |
|
---|
620 | /* Encode attribute name. */
|
---|
621 | for(p3 = str; *p3; p3++) {
|
---|
622 | if(l < n)
|
---|
623 | buf[l] = *p3;
|
---|
624 | l++;
|
---|
625 | }
|
---|
626 | free((char *) str);
|
---|
627 |
|
---|
628 | /* Generate equal sign. */
|
---|
629 | if(l < n)
|
---|
630 | buf[l] = '=';
|
---|
631 | l++;
|
---|
632 |
|
---|
633 | /* Generate value. */
|
---|
634 | str = Curl_ASN1tostr(&value, 0);
|
---|
635 | if(!str)
|
---|
636 | return -1;
|
---|
637 | for(p3 = str; *p3; p3++) {
|
---|
638 | if(l < n)
|
---|
639 | buf[l] = *p3;
|
---|
640 | l++;
|
---|
641 | }
|
---|
642 | free((char *) str);
|
---|
643 | }
|
---|
644 | }
|
---|
645 |
|
---|
646 | return l;
|
---|
647 | }
|
---|
648 |
|
---|
649 | const char * Curl_DNtostr(curl_asn1Element * dn)
|
---|
650 | {
|
---|
651 | char * buf = (char *) NULL;
|
---|
652 | ssize_t n = encodeDN(buf, 0, dn);
|
---|
653 |
|
---|
654 | /* Convert an ASN.1 distinguished name into a printable string.
|
---|
655 | Return the dynamically allocated string, or NULL if an error occurs. */
|
---|
656 |
|
---|
657 | if(n >= 0) {
|
---|
658 | buf = malloc(n + 1);
|
---|
659 | if(buf) {
|
---|
660 | encodeDN(buf, n + 1, dn);
|
---|
661 | buf[n] = '\0';
|
---|
662 | }
|
---|
663 | }
|
---|
664 | return (const char *) buf;
|
---|
665 | }
|
---|
666 |
|
---|
667 | /*
|
---|
668 | * X509 parser.
|
---|
669 | */
|
---|
670 |
|
---|
671 | void Curl_parseX509(curl_X509certificate * cert,
|
---|
672 | const char * beg, const char * end)
|
---|
673 | {
|
---|
674 | curl_asn1Element elem;
|
---|
675 | curl_asn1Element tbsCertificate;
|
---|
676 | const char * ccp;
|
---|
677 | static const char defaultVersion = 0; /* v1. */
|
---|
678 |
|
---|
679 | /* ASN.1 parse an X509 certificate into structure subfields.
|
---|
680 | Syntax is assumed to have already been checked by the SSL backend.
|
---|
681 | See RFC 5280. */
|
---|
682 |
|
---|
683 | cert->certificate.header = NULL;
|
---|
684 | cert->certificate.beg = beg;
|
---|
685 | cert->certificate.end = end;
|
---|
686 |
|
---|
687 | /* Get the sequence content. */
|
---|
688 | Curl_getASN1Element(&elem, beg, end);
|
---|
689 | beg = elem.beg;
|
---|
690 | end = elem.end;
|
---|
691 |
|
---|
692 | /* Get tbsCertificate. */
|
---|
693 | beg = Curl_getASN1Element(&tbsCertificate, beg, end);
|
---|
694 | /* Skip the signatureAlgorithm. */
|
---|
695 | beg = Curl_getASN1Element(&cert->signatureAlgorithm, beg, end);
|
---|
696 | /* Get the signatureValue. */
|
---|
697 | Curl_getASN1Element(&cert->signature, beg, end);
|
---|
698 |
|
---|
699 | /* Parse TBSCertificate. */
|
---|
700 | beg = tbsCertificate.beg;
|
---|
701 | end = tbsCertificate.end;
|
---|
702 | /* Get optional version, get serialNumber. */
|
---|
703 | cert->version.header = NULL;
|
---|
704 | cert->version.beg = &defaultVersion;
|
---|
705 | cert->version.end = &defaultVersion + sizeof defaultVersion;;
|
---|
706 | beg = Curl_getASN1Element(&elem, beg, end);
|
---|
707 | if(elem.tag == 0) {
|
---|
708 | Curl_getASN1Element(&cert->version, elem.beg, elem.end);
|
---|
709 | beg = Curl_getASN1Element(&elem, beg, end);
|
---|
710 | }
|
---|
711 | cert->serialNumber = elem;
|
---|
712 | /* Get signature algorithm. */
|
---|
713 | beg = Curl_getASN1Element(&cert->signatureAlgorithm, beg, end);
|
---|
714 | /* Get issuer. */
|
---|
715 | beg = Curl_getASN1Element(&cert->issuer, beg, end);
|
---|
716 | /* Get notBefore and notAfter. */
|
---|
717 | beg = Curl_getASN1Element(&elem, beg, end);
|
---|
718 | ccp = Curl_getASN1Element(&cert->notBefore, elem.beg, elem.end);
|
---|
719 | Curl_getASN1Element(&cert->notAfter, ccp, elem.end);
|
---|
720 | /* Get subject. */
|
---|
721 | beg = Curl_getASN1Element(&cert->subject, beg, end);
|
---|
722 | /* Get subjectPublicKeyAlgorithm and subjectPublicKey. */
|
---|
723 | beg = Curl_getASN1Element(&cert->subjectPublicKeyInfo, beg, end);
|
---|
724 | ccp = Curl_getASN1Element(&cert->subjectPublicKeyAlgorithm,
|
---|
725 | cert->subjectPublicKeyInfo.beg,
|
---|
726 | cert->subjectPublicKeyInfo.end);
|
---|
727 | Curl_getASN1Element(&cert->subjectPublicKey, ccp,
|
---|
728 | cert->subjectPublicKeyInfo.end);
|
---|
729 | /* Get optional issuerUiqueID, subjectUniqueID and extensions. */
|
---|
730 | cert->issuerUniqueID.tag = cert->subjectUniqueID.tag = 0;
|
---|
731 | cert->extensions.tag = elem.tag = 0;
|
---|
732 | cert->issuerUniqueID.header = cert->subjectUniqueID.header = NULL;
|
---|
733 | cert->issuerUniqueID.beg = cert->issuerUniqueID.end = "";
|
---|
734 | cert->subjectUniqueID.beg = cert->subjectUniqueID.end = "";
|
---|
735 | cert->extensions.header = NULL;
|
---|
736 | cert->extensions.beg = cert->extensions.end = "";
|
---|
737 | if(beg < end)
|
---|
738 | beg = Curl_getASN1Element(&elem, beg, end);
|
---|
739 | if(elem.tag == 1) {
|
---|
740 | cert->issuerUniqueID = elem;
|
---|
741 | if(beg < end)
|
---|
742 | beg = Curl_getASN1Element(&elem, beg, end);
|
---|
743 | }
|
---|
744 | if(elem.tag == 2) {
|
---|
745 | cert->subjectUniqueID = elem;
|
---|
746 | if(beg < end)
|
---|
747 | beg = Curl_getASN1Element(&elem, beg, end);
|
---|
748 | }
|
---|
749 | if(elem.tag == 3)
|
---|
750 | Curl_getASN1Element(&cert->extensions, elem.beg, elem.end);
|
---|
751 | }
|
---|
752 |
|
---|
753 | static size_t copySubstring(char * to, const char * from)
|
---|
754 | {
|
---|
755 | size_t i;
|
---|
756 |
|
---|
757 | /* Copy at most 64-characters, terminate with a newline and returns the
|
---|
758 | effective number of stored characters. */
|
---|
759 |
|
---|
760 | for(i = 0; i < 64; i++) {
|
---|
761 | to[i] = *from;
|
---|
762 | if(!*from++)
|
---|
763 | break;
|
---|
764 | }
|
---|
765 |
|
---|
766 | to[i++] = '\n';
|
---|
767 | return i;
|
---|
768 | }
|
---|
769 |
|
---|
770 | static const char * dumpAlgo(curl_asn1Element * param,
|
---|
771 | const char * beg, const char * end)
|
---|
772 | {
|
---|
773 | curl_asn1Element oid;
|
---|
774 |
|
---|
775 | /* Get algorithm parameters and return algorithm name. */
|
---|
776 |
|
---|
777 | beg = Curl_getASN1Element(&oid, beg, end);
|
---|
778 | param->header = NULL;
|
---|
779 | param->tag = 0;
|
---|
780 | param->beg = param->end = end;
|
---|
781 | if(beg < end)
|
---|
782 | Curl_getASN1Element(param, beg, end);
|
---|
783 | return OID2str(oid.beg, oid.end, TRUE);
|
---|
784 | }
|
---|
785 |
|
---|
786 | static void do_pubkey_field(struct SessionHandle * data, int certnum,
|
---|
787 | const char * label, curl_asn1Element * elem)
|
---|
788 | {
|
---|
789 | const char * output;
|
---|
790 |
|
---|
791 | /* Generate a certificate information record for the public key. */
|
---|
792 |
|
---|
793 | output = Curl_ASN1tostr(elem, 0);
|
---|
794 | if(output) {
|
---|
795 | if(data->set.ssl.certinfo)
|
---|
796 | Curl_ssl_push_certinfo(data, certnum, label, output);
|
---|
797 | if(!certnum)
|
---|
798 | infof(data, " %s: %s\n", label, output);
|
---|
799 | free((char *) output);
|
---|
800 | }
|
---|
801 | }
|
---|
802 |
|
---|
803 | static void do_pubkey(struct SessionHandle * data, int certnum,
|
---|
804 | const char * algo, curl_asn1Element * param,
|
---|
805 | curl_asn1Element * pubkey)
|
---|
806 | {
|
---|
807 | curl_asn1Element elem;
|
---|
808 | curl_asn1Element pk;
|
---|
809 | const char * p;
|
---|
810 | const char * q;
|
---|
811 | unsigned long len;
|
---|
812 | unsigned int i;
|
---|
813 |
|
---|
814 | /* Generate all information records for the public key. */
|
---|
815 |
|
---|
816 | /* Get the public key (single element). */
|
---|
817 | Curl_getASN1Element(&pk, pubkey->beg + 1, pubkey->end);
|
---|
818 |
|
---|
819 | if(curl_strequal(algo, "rsaEncryption")) {
|
---|
820 | p = Curl_getASN1Element(&elem, pk.beg, pk.end);
|
---|
821 | /* Compute key length. */
|
---|
822 | for(q = elem.beg; !*q && q < elem.end; q++)
|
---|
823 | ;
|
---|
824 | len = (unsigned long)((elem.end - q) * 8);
|
---|
825 | if(len)
|
---|
826 | for(i = *(unsigned char *) q; !(i & 0x80); i <<= 1)
|
---|
827 | len--;
|
---|
828 | if(len > 32)
|
---|
829 | elem.beg = q; /* Strip leading zero bytes. */
|
---|
830 | if(!certnum)
|
---|
831 | infof(data, " RSA Public Key (%lu bits)\n", len);
|
---|
832 | if(data->set.ssl.certinfo) {
|
---|
833 | q = curl_maprintf("%lu", len);
|
---|
834 | if(q) {
|
---|
835 | Curl_ssl_push_certinfo(data, certnum, "RSA Public Key", q);
|
---|
836 | free((char *) q);
|
---|
837 | }
|
---|
838 | }
|
---|
839 | /* Generate coefficients. */
|
---|
840 | do_pubkey_field(data, certnum, "rsa(n)", &elem);
|
---|
841 | Curl_getASN1Element(&elem, p, pk.end);
|
---|
842 | do_pubkey_field(data, certnum, "rsa(e)", &elem);
|
---|
843 | }
|
---|
844 | else if(curl_strequal(algo, "dsa")) {
|
---|
845 | p = Curl_getASN1Element(&elem, param->beg, param->end);
|
---|
846 | do_pubkey_field(data, certnum, "dsa(p)", &elem);
|
---|
847 | p = Curl_getASN1Element(&elem, p, param->end);
|
---|
848 | do_pubkey_field(data, certnum, "dsa(q)", &elem);
|
---|
849 | Curl_getASN1Element(&elem, p, param->end);
|
---|
850 | do_pubkey_field(data, certnum, "dsa(g)", &elem);
|
---|
851 | do_pubkey_field(data, certnum, "dsa(pub_key)", &pk);
|
---|
852 | }
|
---|
853 | else if(curl_strequal(algo, "dhpublicnumber")) {
|
---|
854 | p = Curl_getASN1Element(&elem, param->beg, param->end);
|
---|
855 | do_pubkey_field(data, certnum, "dh(p)", &elem);
|
---|
856 | Curl_getASN1Element(&elem, param->beg, param->end);
|
---|
857 | do_pubkey_field(data, certnum, "dh(g)", &elem);
|
---|
858 | do_pubkey_field(data, certnum, "dh(pub_key)", &pk);
|
---|
859 | }
|
---|
860 | #if 0 /* Patent-encumbered. */
|
---|
861 | else if(curl_strequal(algo, "ecPublicKey")) {
|
---|
862 | /* Left TODO. */
|
---|
863 | }
|
---|
864 | #endif
|
---|
865 | }
|
---|
866 |
|
---|
867 | CURLcode Curl_extract_certinfo(struct connectdata * conn,
|
---|
868 | int certnum,
|
---|
869 | const char * beg,
|
---|
870 | const char * end)
|
---|
871 | {
|
---|
872 | curl_X509certificate cert;
|
---|
873 | struct SessionHandle * data = conn->data;
|
---|
874 | curl_asn1Element param;
|
---|
875 | const char * ccp;
|
---|
876 | char * cp1;
|
---|
877 | size_t cl1;
|
---|
878 | char * cp2;
|
---|
879 | CURLcode result;
|
---|
880 | unsigned long version;
|
---|
881 | size_t i;
|
---|
882 | size_t j;
|
---|
883 |
|
---|
884 | if(!data->set.ssl.certinfo)
|
---|
885 | if(certnum)
|
---|
886 | return CURLE_OK;
|
---|
887 |
|
---|
888 | /* Prepare the certificate information for curl_easy_getinfo(). */
|
---|
889 |
|
---|
890 | /* Extract the certificate ASN.1 elements. */
|
---|
891 | Curl_parseX509(&cert, beg, end);
|
---|
892 |
|
---|
893 | /* Subject. */
|
---|
894 | ccp = Curl_DNtostr(&cert.subject);
|
---|
895 | if(!ccp)
|
---|
896 | return CURLE_OUT_OF_MEMORY;
|
---|
897 | if(data->set.ssl.certinfo)
|
---|
898 | Curl_ssl_push_certinfo(data, certnum, "Subject", ccp);
|
---|
899 | if(!certnum)
|
---|
900 | infof(data, "%2d Subject: %s\n", certnum, ccp);
|
---|
901 | free((char *) ccp);
|
---|
902 |
|
---|
903 | /* Issuer. */
|
---|
904 | ccp = Curl_DNtostr(&cert.issuer);
|
---|
905 | if(!ccp)
|
---|
906 | return CURLE_OUT_OF_MEMORY;
|
---|
907 | if(data->set.ssl.certinfo)
|
---|
908 | Curl_ssl_push_certinfo(data, certnum, "Issuer", ccp);
|
---|
909 | if(!certnum)
|
---|
910 | infof(data, " Issuer: %s\n", ccp);
|
---|
911 | free((char *) ccp);
|
---|
912 |
|
---|
913 | /* Version (always fits in less than 32 bits). */
|
---|
914 | version = 0;
|
---|
915 | for(ccp = cert.version.beg; ccp < cert.version.end; ccp++)
|
---|
916 | version = (version << 8) | *(const unsigned char *) ccp;
|
---|
917 | if(data->set.ssl.certinfo) {
|
---|
918 | ccp = curl_maprintf("%lx", version);
|
---|
919 | if(!ccp)
|
---|
920 | return CURLE_OUT_OF_MEMORY;
|
---|
921 | Curl_ssl_push_certinfo(data, certnum, "Version", ccp);
|
---|
922 | free((char *) ccp);
|
---|
923 | }
|
---|
924 | if(!certnum)
|
---|
925 | infof(data, " Version: %lu (0x%lx)\n", version + 1, version);
|
---|
926 |
|
---|
927 | /* Serial number. */
|
---|
928 | ccp = Curl_ASN1tostr(&cert.serialNumber, 0);
|
---|
929 | if(!ccp)
|
---|
930 | return CURLE_OUT_OF_MEMORY;
|
---|
931 | if(data->set.ssl.certinfo)
|
---|
932 | Curl_ssl_push_certinfo(data, certnum, "Serial Number", ccp);
|
---|
933 | if(!certnum)
|
---|
934 | infof(data, " Serial Number: %s\n", ccp);
|
---|
935 | free((char *) ccp);
|
---|
936 |
|
---|
937 | /* Signature algorithm .*/
|
---|
938 | ccp = dumpAlgo(¶m, cert.signatureAlgorithm.beg,
|
---|
939 | cert.signatureAlgorithm.end);
|
---|
940 | if(!ccp)
|
---|
941 | return CURLE_OUT_OF_MEMORY;
|
---|
942 | if(data->set.ssl.certinfo)
|
---|
943 | Curl_ssl_push_certinfo(data, certnum, "Signature Algorithm", ccp);
|
---|
944 | if(!certnum)
|
---|
945 | infof(data, " Signature Algorithm: %s\n", ccp);
|
---|
946 | free((char *) ccp);
|
---|
947 |
|
---|
948 | /* Start Date. */
|
---|
949 | ccp = Curl_ASN1tostr(&cert.notBefore, 0);
|
---|
950 | if(!ccp)
|
---|
951 | return CURLE_OUT_OF_MEMORY;
|
---|
952 | if(data->set.ssl.certinfo)
|
---|
953 | Curl_ssl_push_certinfo(data, certnum, "Start Date", ccp);
|
---|
954 | if(!certnum)
|
---|
955 | infof(data, " Start Date: %s\n", ccp);
|
---|
956 | free((char *) ccp);
|
---|
957 |
|
---|
958 | /* Expire Date. */
|
---|
959 | ccp = Curl_ASN1tostr(&cert.notAfter, 0);
|
---|
960 | if(!ccp)
|
---|
961 | return CURLE_OUT_OF_MEMORY;
|
---|
962 | if(data->set.ssl.certinfo)
|
---|
963 | Curl_ssl_push_certinfo(data, certnum, "Expire Date", ccp);
|
---|
964 | if(!certnum)
|
---|
965 | infof(data, " Expire Date: %s\n", ccp);
|
---|
966 | free((char *) ccp);
|
---|
967 |
|
---|
968 | /* Public Key Algorithm. */
|
---|
969 | ccp = dumpAlgo(¶m, cert.subjectPublicKeyAlgorithm.beg,
|
---|
970 | cert.subjectPublicKeyAlgorithm.end);
|
---|
971 | if(!ccp)
|
---|
972 | return CURLE_OUT_OF_MEMORY;
|
---|
973 | if(data->set.ssl.certinfo)
|
---|
974 | Curl_ssl_push_certinfo(data, certnum, "Public Key Algorithm", ccp);
|
---|
975 | if(!certnum)
|
---|
976 | infof(data, " Public Key Algorithm: %s\n", ccp);
|
---|
977 | do_pubkey(data, certnum, ccp, ¶m, &cert.subjectPublicKey);
|
---|
978 | free((char *) ccp);
|
---|
979 |
|
---|
980 | /* TODO: extensions. */
|
---|
981 |
|
---|
982 | /* Signature. */
|
---|
983 | ccp = Curl_ASN1tostr(&cert.signature, 0);
|
---|
984 | if(!ccp)
|
---|
985 | return CURLE_OUT_OF_MEMORY;
|
---|
986 | if(data->set.ssl.certinfo)
|
---|
987 | Curl_ssl_push_certinfo(data, certnum, "Signature", ccp);
|
---|
988 | if(!certnum)
|
---|
989 | infof(data, " Signature: %s\n", ccp);
|
---|
990 | free((char *) ccp);
|
---|
991 |
|
---|
992 | /* Generate PEM certificate. */
|
---|
993 | result = Curl_base64_encode(data, cert.certificate.beg,
|
---|
994 | cert.certificate.end - cert.certificate.beg,
|
---|
995 | &cp1, &cl1);
|
---|
996 | if(result)
|
---|
997 | return result;
|
---|
998 | /* Compute the number of characters in final certificate string. Format is:
|
---|
999 | -----BEGIN CERTIFICATE-----\n
|
---|
1000 | <max 64 base64 characters>\n
|
---|
1001 | .
|
---|
1002 | .
|
---|
1003 | .
|
---|
1004 | -----END CERTIFICATE-----\n
|
---|
1005 | */
|
---|
1006 | i = 28 + cl1 + (cl1 + 64 - 1) / 64 + 26;
|
---|
1007 | cp2 = malloc(i + 1);
|
---|
1008 | if(!cp2) {
|
---|
1009 | free(cp1);
|
---|
1010 | return CURLE_OUT_OF_MEMORY;
|
---|
1011 | }
|
---|
1012 | /* Build the certificate string. */
|
---|
1013 | i = copySubstring(cp2, "-----BEGIN CERTIFICATE-----");
|
---|
1014 | for(j = 0; j < cl1; j += 64)
|
---|
1015 | i += copySubstring(cp2 + i, cp1 + j);
|
---|
1016 | i += copySubstring(cp2 + i, "-----END CERTIFICATE-----");
|
---|
1017 | cp2[i] = '\0';
|
---|
1018 | free(cp1);
|
---|
1019 | if(data->set.ssl.certinfo)
|
---|
1020 | Curl_ssl_push_certinfo(data, certnum, "Cert", cp2);
|
---|
1021 | if(!certnum)
|
---|
1022 | infof(data, "%s\n", cp2);
|
---|
1023 | free(cp2);
|
---|
1024 | return CURLE_OK;
|
---|
1025 | }
|
---|
1026 |
|
---|
1027 | #endif /* USE_GSKIT or USE_NSS or USE_GNUTLS or USE_CYASSL */
|
---|
1028 |
|
---|
1029 | #if defined(USE_GSKIT)
|
---|
1030 |
|
---|
1031 | static const char * checkOID(const char * beg, const char * end,
|
---|
1032 | const char * oid)
|
---|
1033 | {
|
---|
1034 | curl_asn1Element e;
|
---|
1035 | const char * ccp;
|
---|
1036 | const char * p;
|
---|
1037 | bool matched;
|
---|
1038 |
|
---|
1039 | /* Check if first ASN.1 element at `beg' is the given OID.
|
---|
1040 | Return a pointer in the source after the OID if found, else NULL. */
|
---|
1041 |
|
---|
1042 | ccp = Curl_getASN1Element(&e, beg, end);
|
---|
1043 | if(!ccp || e.tag != CURL_ASN1_OBJECT_IDENTIFIER)
|
---|
1044 | return (const char *) NULL;
|
---|
1045 |
|
---|
1046 | p = OID2str(e.beg, e.end, FALSE);
|
---|
1047 | if(!p)
|
---|
1048 | return (const char *) NULL;
|
---|
1049 |
|
---|
1050 | matched = !strcmp(p, oid);
|
---|
1051 | free((char *) p);
|
---|
1052 | return matched? ccp: (const char *) NULL;
|
---|
1053 | }
|
---|
1054 |
|
---|
1055 | CURLcode Curl_verifyhost(struct connectdata * conn,
|
---|
1056 | const char * beg, const char * end)
|
---|
1057 | {
|
---|
1058 | struct SessionHandle * data = conn->data;
|
---|
1059 | curl_X509certificate cert;
|
---|
1060 | curl_asn1Element dn;
|
---|
1061 | curl_asn1Element elem;
|
---|
1062 | curl_asn1Element ext;
|
---|
1063 | curl_asn1Element name;
|
---|
1064 | const char * p;
|
---|
1065 | const char * q;
|
---|
1066 | char * dnsname;
|
---|
1067 | int matched = -1;
|
---|
1068 | size_t addrlen = (size_t) -1;
|
---|
1069 | ssize_t len;
|
---|
1070 | #ifdef ENABLE_IPV6
|
---|
1071 | struct in6_addr addr;
|
---|
1072 | #else
|
---|
1073 | struct in_addr addr;
|
---|
1074 | #endif
|
---|
1075 |
|
---|
1076 | /* Verify that connection server matches info in X509 certificate at
|
---|
1077 | `beg'..`end'. */
|
---|
1078 |
|
---|
1079 | if(!data->set.ssl.verifyhost)
|
---|
1080 | return CURLE_OK;
|
---|
1081 |
|
---|
1082 | if(!beg)
|
---|
1083 | return CURLE_PEER_FAILED_VERIFICATION;
|
---|
1084 | Curl_parseX509(&cert, beg, end);
|
---|
1085 |
|
---|
1086 | /* Get the server IP address. */
|
---|
1087 | #ifdef ENABLE_IPV6
|
---|
1088 | if(conn->bits.ipv6_ip && Curl_inet_pton(AF_INET6, conn->host.name, &addr))
|
---|
1089 | addrlen = sizeof(struct in6_addr);
|
---|
1090 | else
|
---|
1091 | #endif
|
---|
1092 | if(Curl_inet_pton(AF_INET, conn->host.name, &addr))
|
---|
1093 | addrlen = sizeof(struct in_addr);
|
---|
1094 |
|
---|
1095 | /* Process extensions. */
|
---|
1096 | for(p = cert.extensions.beg; p < cert.extensions.end && matched != 1;) {
|
---|
1097 | p = Curl_getASN1Element(&ext, p, cert.extensions.end);
|
---|
1098 | /* Check if extension is a subjectAlternativeName. */
|
---|
1099 | ext.beg = checkOID(ext.beg, ext.end, sanOID);
|
---|
1100 | if(ext.beg) {
|
---|
1101 | ext.beg = Curl_getASN1Element(&elem, ext.beg, ext.end);
|
---|
1102 | /* Skip critical if present. */
|
---|
1103 | if(elem.tag == CURL_ASN1_BOOLEAN)
|
---|
1104 | ext.beg = Curl_getASN1Element(&elem, ext.beg, ext.end);
|
---|
1105 | /* Parse the octet string contents: is a single sequence. */
|
---|
1106 | Curl_getASN1Element(&elem, elem.beg, elem.end);
|
---|
1107 | /* Check all GeneralNames. */
|
---|
1108 | for(q = elem.beg; matched != 1 && q < elem.end;) {
|
---|
1109 | q = Curl_getASN1Element(&name, q, elem.end);
|
---|
1110 | switch (name.tag) {
|
---|
1111 | case 2: /* DNS name. */
|
---|
1112 | len = utf8asn1str(&dnsname, CURL_ASN1_IA5_STRING,
|
---|
1113 | name.beg, name.end);
|
---|
1114 | if(len > 0 && (size_t)len == strlen(dnsname))
|
---|
1115 | matched = Curl_cert_hostcheck(dnsname, conn->host.name);
|
---|
1116 | else
|
---|
1117 | matched = 0;
|
---|
1118 | free(dnsname);
|
---|
1119 | break;
|
---|
1120 |
|
---|
1121 | case 7: /* IP address. */
|
---|
1122 | matched = (size_t) (name.end - q) == addrlen &&
|
---|
1123 | !memcmp(&addr, q, addrlen);
|
---|
1124 | break;
|
---|
1125 | }
|
---|
1126 | }
|
---|
1127 | }
|
---|
1128 | }
|
---|
1129 |
|
---|
1130 | switch (matched) {
|
---|
1131 | case 1:
|
---|
1132 | /* an alternative name matched the server hostname */
|
---|
1133 | infof(data, "\t subjectAltName: %s matched\n", conn->host.dispname);
|
---|
1134 | return CURLE_OK;
|
---|
1135 | case 0:
|
---|
1136 | /* an alternative name field existed, but didn't match and then
|
---|
1137 | we MUST fail */
|
---|
1138 | infof(data, "\t subjectAltName does not match %s\n", conn->host.dispname);
|
---|
1139 | return CURLE_PEER_FAILED_VERIFICATION;
|
---|
1140 | }
|
---|
1141 |
|
---|
1142 | /* Process subject. */
|
---|
1143 | name.header = NULL;
|
---|
1144 | name.beg = name.end = "";
|
---|
1145 | q = cert.subject.beg;
|
---|
1146 | /* we have to look to the last occurrence of a commonName in the
|
---|
1147 | distinguished one to get the most significant one. */
|
---|
1148 | while(q < cert.subject.end) {
|
---|
1149 | q = Curl_getASN1Element(&dn, q, cert.subject.end);
|
---|
1150 | for(p = dn.beg; p < dn.end;) {
|
---|
1151 | p = Curl_getASN1Element(&elem, p, dn.end);
|
---|
1152 | /* We have a DN's AttributeTypeAndValue: check it in case it's a CN. */
|
---|
1153 | elem.beg = checkOID(elem.beg, elem.end, cnOID);
|
---|
1154 | if(elem.beg)
|
---|
1155 | name = elem; /* Latch CN. */
|
---|
1156 | }
|
---|
1157 | }
|
---|
1158 |
|
---|
1159 | /* Check the CN if found. */
|
---|
1160 | if(!Curl_getASN1Element(&elem, name.beg, name.end))
|
---|
1161 | failf(data, "SSL: unable to obtain common name from peer certificate");
|
---|
1162 | else {
|
---|
1163 | len = utf8asn1str(&dnsname, elem.tag, elem.beg, elem.end);
|
---|
1164 | if(len < 0) {
|
---|
1165 | free(dnsname);
|
---|
1166 | return CURLE_OUT_OF_MEMORY;
|
---|
1167 | }
|
---|
1168 | if(strlen(dnsname) != (size_t) len) /* Nul byte in string ? */
|
---|
1169 | failf(data, "SSL: illegal cert name field");
|
---|
1170 | else if(Curl_cert_hostcheck((const char *) dnsname, conn->host.name)) {
|
---|
1171 | infof(data, "\t common name: %s (matched)\n", dnsname);
|
---|
1172 | free(dnsname);
|
---|
1173 | return CURLE_OK;
|
---|
1174 | }
|
---|
1175 | else
|
---|
1176 | failf(data, "SSL: certificate subject name '%s' does not match "
|
---|
1177 | "target host name '%s'", dnsname, conn->host.dispname);
|
---|
1178 | free(dnsname);
|
---|
1179 | }
|
---|
1180 |
|
---|
1181 | return CURLE_PEER_FAILED_VERIFICATION;
|
---|
1182 | }
|
---|
1183 |
|
---|
1184 | #endif /* USE_GSKIT */
|
---|