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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2022, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
* SPDX-License-Identifier: curl
*
***************************************************************************/
#include "curl_setup.h"
#if !defined(CURL_DISABLE_HTTP) && !defined(CURL_DISABLE_CRYPTO_AUTH)
#include "urldata.h"
#include "strcase.h"
#include "vauth/vauth.h"
#include "http_digest.h"
/* The last 3 #include files should be in this order */
#include "curl_printf.h"
#include "curl_memory.h"
#include "memdebug.h"
/* Test example headers:
WWW-Authenticate: Digest realm="testrealm", nonce="1053604598"
Proxy-Authenticate: Digest realm="testrealm", nonce="1053604598"
*/
CURLcode Curl_input_digest(struct Curl_easy *data,
bool proxy,
const char *header) /* rest of the *-authenticate:
header */
{
/* Point to the correct struct with this */
struct digestdata *digest;
if(proxy) {
digest = &data->state.proxydigest;
}
else {
digest = &data->state.digest;
}
if(!checkprefix("Digest", header) || !ISBLANK(header[6]))
return CURLE_BAD_CONTENT_ENCODING;
header += strlen("Digest");
while(*header && ISBLANK(*header))
header++;
return Curl_auth_decode_digest_http_message(header, digest);
}
CURLcode Curl_output_digest(struct Curl_easy *data,
bool proxy,
const unsigned char *request,
const unsigned char *uripath)
{
CURLcode result;
unsigned char *path = NULL;
char *tmp = NULL;
char *response;
size_t len;
bool have_chlg;
/* Point to the address of the pointer that holds the string to send to the
server, which is for a plain host or for a HTTP proxy */
char **allocuserpwd;
/* Point to the name and password for this */
const char *userp;
const char *passwdp;
/* Point to the correct struct with this */
struct digestdata *digest;
struct auth *authp;
if(proxy) {
#ifdef CURL_DISABLE_PROXY
return CURLE_NOT_BUILT_IN;
#else
digest = &data->state.proxydigest;
allocuserpwd = &data->state.aptr.proxyuserpwd;
userp = data->state.aptr.proxyuser;
passwdp = data->state.aptr.proxypasswd;
authp = &data->state.authproxy;
#endif
}
else {
digest = &data->state.digest;
allocuserpwd = &data->state.aptr.userpwd;
userp = data->state.aptr.user;
passwdp = data->state.aptr.passwd;
authp = &data->state.authhost;
}
Curl_safefree(*allocuserpwd);
/* not set means empty */
if(!userp)
userp = "";
if(!passwdp)
passwdp = "";
#if defined(USE_WINDOWS_SSPI)
have_chlg = digest->input_token ? TRUE : FALSE;
#else
have_chlg = digest->nonce ? TRUE : FALSE;
#endif
if(!have_chlg) {
authp->done = FALSE;
return CURLE_OK;
}
/* So IE browsers < v7 cut off the URI part at the query part when they
evaluate the MD5 and some (IIS?) servers work with them so we may need to
do the Digest IE-style. Note that the different ways cause different MD5
sums to get sent.
Apache servers can be set to do the Digest IE-style automatically using
the BrowserMatch feature:
https://httpd.apache.org/docs/2.2/mod/mod_auth_digest.html#msie
Further details on Digest implementation differences:
http://www.fngtps.com/2006/09/http-authentication
*/
if(authp->iestyle) {
tmp = strchr((char *)uripath, '?');
if(tmp) {
size_t urilen = tmp - (char *)uripath;
/* typecast is fine here since the value is always less than 32 bits */
path = (unsigned char *) aprintf("%.*s", (int)urilen, uripath);
}
}
if(!tmp)
path = (unsigned char *) strdup((char *) uripath);
if(!path)
return CURLE_OUT_OF_MEMORY;
result = Curl_auth_create_digest_http_message(data, userp, passwdp, request,
path, digest, &response, &len);
free(path);
if(result)
return result;
*allocuserpwd = aprintf("%sAuthorization: Digest %s\r\n",
proxy ? "Proxy-" : "",
response);
free(response);
if(!*allocuserpwd)
return CURLE_OUT_OF_MEMORY;
authp->done = TRUE;
return CURLE_OK;
}
void Curl_http_auth_cleanup_digest(struct Curl_easy *data)
{
Curl_auth_digest_cleanup(&data->state.digest);
Curl_auth_digest_cleanup(&data->state.proxydigest);
}
#endif
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