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 - 2014, 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 | #ifdef CURL_DOES_CONVERSIONS
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26 |
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27 | #include <curl/curl.h>
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28 |
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29 | #include "non-ascii.h"
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30 | #include "formdata.h"
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31 | #include "sendf.h"
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32 | #include "urldata.h"
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33 |
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34 | #include "curl_memory.h"
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35 | /* The last #include file should be: */
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36 | #include "memdebug.h"
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37 |
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38 | #ifdef HAVE_ICONV
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39 | #include <iconv.h>
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40 | /* set default codesets for iconv */
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41 | #ifndef CURL_ICONV_CODESET_OF_NETWORK
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42 | #define CURL_ICONV_CODESET_OF_NETWORK "ISO8859-1"
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43 | #endif
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44 | #ifndef CURL_ICONV_CODESET_FOR_UTF8
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45 | #define CURL_ICONV_CODESET_FOR_UTF8 "UTF-8"
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46 | #endif
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47 | #define ICONV_ERROR (size_t)-1
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48 | #endif /* HAVE_ICONV */
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49 |
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50 | /*
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51 | * Curl_convert_clone() returns a malloced copy of the source string (if
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52 | * returning CURLE_OK), with the data converted to network format.
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53 | */
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54 | CURLcode Curl_convert_clone(struct SessionHandle *data,
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55 | const char *indata,
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56 | size_t insize,
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57 | char **outbuf)
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58 | {
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59 | char *convbuf;
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60 | CURLcode result;
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61 |
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62 | convbuf = malloc(insize);
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63 | if(!convbuf)
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64 | return CURLE_OUT_OF_MEMORY;
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65 |
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66 | memcpy(convbuf, indata, insize);
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67 | result = Curl_convert_to_network(data, convbuf, insize);
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68 | if(result) {
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69 | free(convbuf);
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70 | return result;
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71 | }
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72 |
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73 | *outbuf = convbuf; /* return the converted buffer */
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74 |
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75 | return CURLE_OK;
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76 | }
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77 |
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78 | /*
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79 | * Curl_convert_to_network() is an internal function for performing ASCII
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80 | * conversions on non-ASCII platforms. It convers the buffer _in place_.
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81 | */
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82 | CURLcode Curl_convert_to_network(struct SessionHandle *data,
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83 | char *buffer, size_t length)
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84 | {
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85 | if(data->set.convtonetwork) {
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86 | /* use translation callback */
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87 | CURLcode result = data->set.convtonetwork(buffer, length);
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88 | if(result) {
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89 | failf(data,
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90 | "CURLOPT_CONV_TO_NETWORK_FUNCTION callback returned %d: %s",
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91 | (int)result, curl_easy_strerror(result));
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92 | }
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93 |
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94 | return result;
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95 | }
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96 | else {
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97 | #ifdef HAVE_ICONV
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98 | /* do the translation ourselves */
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99 | char *input_ptr, *output_ptr;
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100 | size_t in_bytes, out_bytes, rc;
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101 | int error;
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102 |
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103 | /* open an iconv conversion descriptor if necessary */
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104 | if(data->outbound_cd == (iconv_t)-1) {
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105 | data->outbound_cd = iconv_open(CURL_ICONV_CODESET_OF_NETWORK,
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106 | CURL_ICONV_CODESET_OF_HOST);
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107 | if(data->outbound_cd == (iconv_t)-1) {
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108 | error = ERRNO;
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109 | failf(data,
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110 | "The iconv_open(\"%s\", \"%s\") call failed with errno %i: %s",
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111 | CURL_ICONV_CODESET_OF_NETWORK,
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112 | CURL_ICONV_CODESET_OF_HOST,
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113 | error, strerror(error));
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114 | return CURLE_CONV_FAILED;
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115 | }
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116 | }
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117 | /* call iconv */
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118 | input_ptr = output_ptr = buffer;
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119 | in_bytes = out_bytes = length;
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120 | rc = iconv(data->outbound_cd, (const char**)&input_ptr, &in_bytes,
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121 | &output_ptr, &out_bytes);
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122 | if((rc == ICONV_ERROR) || (in_bytes != 0)) {
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123 | error = ERRNO;
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124 | failf(data,
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125 | "The Curl_convert_to_network iconv call failed with errno %i: %s",
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126 | error, strerror(error));
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127 | return CURLE_CONV_FAILED;
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128 | }
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129 | #else
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130 | failf(data, "CURLOPT_CONV_TO_NETWORK_FUNCTION callback required");
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131 | return CURLE_CONV_REQD;
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132 | #endif /* HAVE_ICONV */
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133 | }
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134 |
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135 | return CURLE_OK;
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136 | }
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137 |
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138 | /*
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139 | * Curl_convert_from_network() is an internal function for performing ASCII
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140 | * conversions on non-ASCII platforms. It convers the buffer _in place_.
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141 | */
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142 | CURLcode Curl_convert_from_network(struct SessionHandle *data,
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143 | char *buffer, size_t length)
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144 | {
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145 | if(data->set.convfromnetwork) {
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146 | /* use translation callback */
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147 | CURLcode result = data->set.convfromnetwork(buffer, length);
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148 | if(result) {
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149 | failf(data,
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150 | "CURLOPT_CONV_FROM_NETWORK_FUNCTION callback returned %d: %s",
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151 | (int)result, curl_easy_strerror(result));
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152 | }
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153 |
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154 | return result;
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155 | }
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156 | else {
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157 | #ifdef HAVE_ICONV
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158 | /* do the translation ourselves */
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159 | char *input_ptr, *output_ptr;
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160 | size_t in_bytes, out_bytes, rc;
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161 | int error;
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162 |
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163 | /* open an iconv conversion descriptor if necessary */
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164 | if(data->inbound_cd == (iconv_t)-1) {
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165 | data->inbound_cd = iconv_open(CURL_ICONV_CODESET_OF_HOST,
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166 | CURL_ICONV_CODESET_OF_NETWORK);
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167 | if(data->inbound_cd == (iconv_t)-1) {
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168 | error = ERRNO;
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169 | failf(data,
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170 | "The iconv_open(\"%s\", \"%s\") call failed with errno %i: %s",
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171 | CURL_ICONV_CODESET_OF_HOST,
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172 | CURL_ICONV_CODESET_OF_NETWORK,
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173 | error, strerror(error));
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174 | return CURLE_CONV_FAILED;
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175 | }
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176 | }
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177 | /* call iconv */
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178 | input_ptr = output_ptr = buffer;
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179 | in_bytes = out_bytes = length;
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180 | rc = iconv(data->inbound_cd, (const char **)&input_ptr, &in_bytes,
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181 | &output_ptr, &out_bytes);
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182 | if((rc == ICONV_ERROR) || (in_bytes != 0)) {
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183 | error = ERRNO;
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184 | failf(data,
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185 | "Curl_convert_from_network iconv call failed with errno %i: %s",
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186 | error, strerror(error));
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187 | return CURLE_CONV_FAILED;
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188 | }
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189 | #else
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190 | failf(data, "CURLOPT_CONV_FROM_NETWORK_FUNCTION callback required");
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191 | return CURLE_CONV_REQD;
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192 | #endif /* HAVE_ICONV */
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193 | }
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194 |
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195 | return CURLE_OK;
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196 | }
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197 |
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198 | /*
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199 | * Curl_convert_from_utf8() is an internal function for performing UTF-8
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200 | * conversions on non-ASCII platforms.
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201 | */
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202 | CURLcode Curl_convert_from_utf8(struct SessionHandle *data,
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203 | char *buffer, size_t length)
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204 | {
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205 | if(data->set.convfromutf8) {
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206 | /* use translation callback */
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207 | CURLcode result = data->set.convfromutf8(buffer, length);
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208 | if(result) {
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209 | failf(data,
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210 | "CURLOPT_CONV_FROM_UTF8_FUNCTION callback returned %d: %s",
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211 | (int)result, curl_easy_strerror(result));
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212 | }
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213 |
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214 | return result;
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215 | }
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216 | else {
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217 | #ifdef HAVE_ICONV
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218 | /* do the translation ourselves */
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219 | const char *input_ptr;
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220 | char *output_ptr;
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221 | size_t in_bytes, out_bytes, rc;
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222 | int error;
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223 |
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224 | /* open an iconv conversion descriptor if necessary */
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225 | if(data->utf8_cd == (iconv_t)-1) {
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226 | data->utf8_cd = iconv_open(CURL_ICONV_CODESET_OF_HOST,
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227 | CURL_ICONV_CODESET_FOR_UTF8);
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228 | if(data->utf8_cd == (iconv_t)-1) {
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229 | error = ERRNO;
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230 | failf(data,
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231 | "The iconv_open(\"%s\", \"%s\") call failed with errno %i: %s",
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232 | CURL_ICONV_CODESET_OF_HOST,
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233 | CURL_ICONV_CODESET_FOR_UTF8,
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234 | error, strerror(error));
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235 | return CURLE_CONV_FAILED;
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236 | }
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237 | }
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238 | /* call iconv */
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239 | input_ptr = output_ptr = buffer;
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240 | in_bytes = out_bytes = length;
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241 | rc = iconv(data->utf8_cd, &input_ptr, &in_bytes,
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242 | &output_ptr, &out_bytes);
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243 | if((rc == ICONV_ERROR) || (in_bytes != 0)) {
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244 | error = ERRNO;
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245 | failf(data,
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246 | "The Curl_convert_from_utf8 iconv call failed with errno %i: %s",
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247 | error, strerror(error));
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248 | return CURLE_CONV_FAILED;
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249 | }
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250 | if(output_ptr < input_ptr) {
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251 | /* null terminate the now shorter output string */
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252 | *output_ptr = 0x00;
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253 | }
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254 | #else
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255 | failf(data, "CURLOPT_CONV_FROM_UTF8_FUNCTION callback required");
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256 | return CURLE_CONV_REQD;
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257 | #endif /* HAVE_ICONV */
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258 | }
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259 |
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260 | return CURLE_OK;
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261 | }
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262 |
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263 | /*
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264 | * Init conversion stuff for a SessionHandle
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265 | */
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266 | void Curl_convert_init(struct SessionHandle *data)
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267 | {
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268 | #if defined(CURL_DOES_CONVERSIONS) && defined(HAVE_ICONV)
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269 | /* conversion descriptors for iconv calls */
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270 | data->outbound_cd = (iconv_t)-1;
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271 | data->inbound_cd = (iconv_t)-1;
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272 | data->utf8_cd = (iconv_t)-1;
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273 | #else
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274 | (void)data;
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275 | #endif /* CURL_DOES_CONVERSIONS && HAVE_ICONV */
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276 | }
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277 |
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278 | /*
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279 | * Setup conversion stuff for a SessionHandle
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280 | */
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281 | void Curl_convert_setup(struct SessionHandle *data)
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282 | {
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283 | data->inbound_cd = iconv_open(CURL_ICONV_CODESET_OF_HOST,
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284 | CURL_ICONV_CODESET_OF_NETWORK);
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285 | data->outbound_cd = iconv_open(CURL_ICONV_CODESET_OF_NETWORK,
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286 | CURL_ICONV_CODESET_OF_HOST);
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287 | data->utf8_cd = iconv_open(CURL_ICONV_CODESET_OF_HOST,
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288 | CURL_ICONV_CODESET_FOR_UTF8);
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289 | }
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290 |
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291 | /*
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292 | * Close conversion stuff for a SessionHandle
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293 | */
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294 |
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295 | void Curl_convert_close(struct SessionHandle *data)
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296 | {
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297 | #ifdef HAVE_ICONV
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298 | /* close iconv conversion descriptors */
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299 | if(data->inbound_cd != (iconv_t)-1) {
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300 | iconv_close(data->inbound_cd);
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301 | }
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302 | if(data->outbound_cd != (iconv_t)-1) {
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303 | iconv_close(data->outbound_cd);
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304 | }
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305 | if(data->utf8_cd != (iconv_t)-1) {
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306 | iconv_close(data->utf8_cd);
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307 | }
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308 | #else
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309 | (void)data;
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310 | #endif /* HAVE_ICONV */
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311 | }
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312 |
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313 | /*
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314 | * Curl_convert_form() is used from http.c, this converts any form items that
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315 | need to be sent in the network encoding. Returns CURLE_OK on success.
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316 | */
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317 | CURLcode Curl_convert_form(struct SessionHandle *data, struct FormData *form)
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318 | {
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319 | CURLcode result;
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320 |
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321 | if(!data)
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322 | return CURLE_BAD_FUNCTION_ARGUMENT;
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323 |
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324 | while(form) {
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325 | if(form->type == FORM_DATA) {
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326 | result = Curl_convert_to_network(data, form->line, form->length);
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327 | /* Curl_convert_to_network calls failf if unsuccessful */
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328 | if(result)
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329 | return result;
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330 | }
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331 |
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332 | form = form->next;
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333 | }
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334 |
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335 | return CURLE_OK;
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336 | }
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337 |
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338 | #endif /* CURL_DOES_CONVERSIONS */
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