[337] | 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 - 2017, 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 Curl_easy *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 Curl_easy *data,
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| 83 | char *buffer, size_t length)
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| 84 | {
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| 85 | if(data && 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 | iconv_t tmpcd = (iconv_t) -1;
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| 100 | iconv_t *cd = &tmpcd;
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| 101 | char *input_ptr, *output_ptr;
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| 102 | size_t in_bytes, out_bytes, rc;
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| 103 |
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| 104 | /* open an iconv conversion descriptor if necessary */
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| 105 | if(data)
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| 106 | cd = &data->outbound_cd;
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| 107 | if(*cd == (iconv_t)-1) {
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| 108 | *cd = iconv_open(CURL_ICONV_CODESET_OF_NETWORK,
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| 109 | CURL_ICONV_CODESET_OF_HOST);
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| 110 | if(*cd == (iconv_t)-1) {
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| 111 | failf(data,
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| 112 | "The iconv_open(\"%s\", \"%s\") call failed with errno %i: %s",
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| 113 | CURL_ICONV_CODESET_OF_NETWORK,
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| 114 | CURL_ICONV_CODESET_OF_HOST,
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| 115 | errno, strerror(errno));
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| 116 | return CURLE_CONV_FAILED;
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| 117 | }
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| 118 | }
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| 119 | /* call iconv */
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| 120 | input_ptr = output_ptr = buffer;
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| 121 | in_bytes = out_bytes = length;
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| 122 | rc = iconv(*cd, &input_ptr, &in_bytes,
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| 123 | &output_ptr, &out_bytes);
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| 124 | if(!data)
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| 125 | iconv_close(tmpcd);
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| 126 | if((rc == ICONV_ERROR) || (in_bytes != 0)) {
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| 127 | failf(data,
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| 128 | "The Curl_convert_to_network iconv call failed with errno %i: %s",
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| 129 | errno, strerror(errno));
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| 130 | return CURLE_CONV_FAILED;
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| 131 | }
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| 132 | #else
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| 133 | failf(data, "CURLOPT_CONV_TO_NETWORK_FUNCTION callback required");
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| 134 | return CURLE_CONV_REQD;
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| 135 | #endif /* HAVE_ICONV */
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| 136 | }
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| 137 |
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| 138 | return CURLE_OK;
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| 139 | }
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| 140 |
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| 141 | /*
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| 142 | * Curl_convert_from_network() is an internal function for performing ASCII
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| 143 | * conversions on non-ASCII platforms. It convers the buffer _in place_.
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| 144 | */
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| 145 | CURLcode Curl_convert_from_network(struct Curl_easy *data,
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| 146 | char *buffer, size_t length)
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| 147 | {
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| 148 | if(data && data->set.convfromnetwork) {
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| 149 | /* use translation callback */
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| 150 | CURLcode result = data->set.convfromnetwork(buffer, length);
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| 151 | if(result) {
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| 152 | failf(data,
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| 153 | "CURLOPT_CONV_FROM_NETWORK_FUNCTION callback returned %d: %s",
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| 154 | (int)result, curl_easy_strerror(result));
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| 155 | }
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| 156 |
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| 157 | return result;
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| 158 | }
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| 159 | else {
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| 160 | #ifdef HAVE_ICONV
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| 161 | /* do the translation ourselves */
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| 162 | iconv_t tmpcd = (iconv_t) -1;
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| 163 | iconv_t *cd = &tmpcd;
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| 164 | char *input_ptr, *output_ptr;
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| 165 | size_t in_bytes, out_bytes, rc;
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| 166 |
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| 167 | /* open an iconv conversion descriptor if necessary */
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| 168 | if(data)
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| 169 | cd = &data->inbound_cd;
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| 170 | if(*cd == (iconv_t)-1) {
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| 171 | *cd = iconv_open(CURL_ICONV_CODESET_OF_HOST,
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| 172 | CURL_ICONV_CODESET_OF_NETWORK);
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| 173 | if(*cd == (iconv_t)-1) {
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| 174 | failf(data,
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| 175 | "The iconv_open(\"%s\", \"%s\") call failed with errno %i: %s",
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| 176 | CURL_ICONV_CODESET_OF_HOST,
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| 177 | CURL_ICONV_CODESET_OF_NETWORK,
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| 178 | errno, strerror(errno));
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| 179 | return CURLE_CONV_FAILED;
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| 180 | }
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| 181 | }
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| 182 | /* call iconv */
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| 183 | input_ptr = output_ptr = buffer;
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| 184 | in_bytes = out_bytes = length;
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| 185 | rc = iconv(*cd, &input_ptr, &in_bytes,
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| 186 | &output_ptr, &out_bytes);
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| 187 | if(!data)
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| 188 | iconv_close(tmpcd);
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| 189 | if((rc == ICONV_ERROR) || (in_bytes != 0)) {
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| 190 | failf(data,
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| 191 | "Curl_convert_from_network iconv call failed with errno %i: %s",
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| 192 | errno, strerror(errno));
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| 193 | return CURLE_CONV_FAILED;
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| 194 | }
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| 195 | #else
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| 196 | failf(data, "CURLOPT_CONV_FROM_NETWORK_FUNCTION callback required");
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| 197 | return CURLE_CONV_REQD;
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| 198 | #endif /* HAVE_ICONV */
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| 199 | }
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| 200 |
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| 201 | return CURLE_OK;
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| 202 | }
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| 203 |
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| 204 | /*
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| 205 | * Curl_convert_from_utf8() is an internal function for performing UTF-8
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| 206 | * conversions on non-ASCII platforms.
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| 207 | */
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| 208 | CURLcode Curl_convert_from_utf8(struct Curl_easy *data,
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| 209 | char *buffer, size_t length)
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| 210 | {
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| 211 | if(data && data->set.convfromutf8) {
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| 212 | /* use translation callback */
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| 213 | CURLcode result = data->set.convfromutf8(buffer, length);
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| 214 | if(result) {
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| 215 | failf(data,
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| 216 | "CURLOPT_CONV_FROM_UTF8_FUNCTION callback returned %d: %s",
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| 217 | (int)result, curl_easy_strerror(result));
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| 218 | }
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| 219 |
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| 220 | return result;
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| 221 | }
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| 222 | else {
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| 223 | #ifdef HAVE_ICONV
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| 224 | /* do the translation ourselves */
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| 225 | iconv_t tmpcd = (iconv_t) -1;
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| 226 | iconv_t *cd = &tmpcd;
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| 227 | char *input_ptr;
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| 228 | char *output_ptr;
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| 229 | size_t in_bytes, out_bytes, rc;
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| 230 |
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| 231 | /* open an iconv conversion descriptor if necessary */
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| 232 | if(data)
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| 233 | cd = &data->utf8_cd;
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| 234 | if(*cd == (iconv_t)-1) {
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| 235 | *cd = iconv_open(CURL_ICONV_CODESET_OF_HOST,
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| 236 | CURL_ICONV_CODESET_FOR_UTF8);
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| 237 | if(*cd == (iconv_t)-1) {
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| 238 | failf(data,
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| 239 | "The iconv_open(\"%s\", \"%s\") call failed with errno %i: %s",
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| 240 | CURL_ICONV_CODESET_OF_HOST,
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| 241 | CURL_ICONV_CODESET_FOR_UTF8,
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| 242 | errno, strerror(errno));
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| 243 | return CURLE_CONV_FAILED;
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| 244 | }
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| 245 | }
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| 246 | /* call iconv */
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| 247 | input_ptr = output_ptr = buffer;
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| 248 | in_bytes = out_bytes = length;
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| 249 | rc = iconv(*cd, &input_ptr, &in_bytes,
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| 250 | &output_ptr, &out_bytes);
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| 251 | if(!data)
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| 252 | iconv_close(tmpcd);
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| 253 | if((rc == ICONV_ERROR) || (in_bytes != 0)) {
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| 254 | failf(data,
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| 255 | "The Curl_convert_from_utf8 iconv call failed with errno %i: %s",
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| 256 | errno, strerror(errno));
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| 257 | return CURLE_CONV_FAILED;
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| 258 | }
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| 259 | if(output_ptr < input_ptr) {
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| 260 | /* null terminate the now shorter output string */
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| 261 | *output_ptr = 0x00;
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| 262 | }
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| 263 | #else
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| 264 | failf(data, "CURLOPT_CONV_FROM_UTF8_FUNCTION callback required");
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| 265 | return CURLE_CONV_REQD;
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| 266 | #endif /* HAVE_ICONV */
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| 267 | }
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| 268 |
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| 269 | return CURLE_OK;
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| 270 | }
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| 271 |
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| 272 | /*
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| 273 | * Init conversion stuff for a Curl_easy
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| 274 | */
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| 275 | void Curl_convert_init(struct Curl_easy *data)
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| 276 | {
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| 277 | #if defined(CURL_DOES_CONVERSIONS) && defined(HAVE_ICONV)
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| 278 | /* conversion descriptors for iconv calls */
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| 279 | data->outbound_cd = (iconv_t)-1;
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| 280 | data->inbound_cd = (iconv_t)-1;
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| 281 | data->utf8_cd = (iconv_t)-1;
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| 282 | #else
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| 283 | (void)data;
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| 284 | #endif /* CURL_DOES_CONVERSIONS && HAVE_ICONV */
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| 285 | }
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| 286 |
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| 287 | /*
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| 288 | * Setup conversion stuff for a Curl_easy
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| 289 | */
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| 290 | void Curl_convert_setup(struct Curl_easy *data)
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| 291 | {
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| 292 | data->inbound_cd = iconv_open(CURL_ICONV_CODESET_OF_HOST,
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| 293 | CURL_ICONV_CODESET_OF_NETWORK);
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| 294 | data->outbound_cd = iconv_open(CURL_ICONV_CODESET_OF_NETWORK,
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| 295 | CURL_ICONV_CODESET_OF_HOST);
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| 296 | data->utf8_cd = iconv_open(CURL_ICONV_CODESET_OF_HOST,
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| 297 | CURL_ICONV_CODESET_FOR_UTF8);
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| 298 | }
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| 299 |
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| 300 | /*
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| 301 | * Close conversion stuff for a Curl_easy
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| 302 | */
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| 303 |
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| 304 | void Curl_convert_close(struct Curl_easy *data)
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| 305 | {
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| 306 | #ifdef HAVE_ICONV
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| 307 | /* close iconv conversion descriptors */
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| 308 | if(data->inbound_cd != (iconv_t)-1) {
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| 309 | iconv_close(data->inbound_cd);
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| 310 | }
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| 311 | if(data->outbound_cd != (iconv_t)-1) {
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| 312 | iconv_close(data->outbound_cd);
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| 313 | }
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| 314 | if(data->utf8_cd != (iconv_t)-1) {
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| 315 | iconv_close(data->utf8_cd);
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| 316 | }
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| 317 | #else
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| 318 | (void)data;
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| 319 | #endif /* HAVE_ICONV */
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| 320 | }
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| 321 |
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| 322 | #endif /* CURL_DOES_CONVERSIONS */
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