curl/lib/http_digest.c
Daniel Stenberg e15e51384a
http: move header storage to Curl_easy from connectdata
Since the connection can be used by many independent requests (using
HTTP/2 or HTTP/3), things like user-agent and other transfer-specific
data MUST NOT be kept connection oriented as it could lead to requests
getting the wrong string for their requests. This struct data was
lingering like this due to old HTTP1 legacy thinking where it didn't
mattered..

Fixes #5566
Closes #5567
2020-06-15 22:56:25 +02:00

186 lines
5.1 KiB
C

/***************************************************************************
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* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2020, 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.haxx.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.
*
***************************************************************************/
#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 connectdata *conn,
bool proxy,
const char *header) /* rest of the *-authenticate:
header */
{
struct Curl_easy *data = conn->data;
/* 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))
return CURLE_BAD_CONTENT_ENCODING;
header += strlen("Digest");
while(*header && ISSPACE(*header))
header++;
return Curl_auth_decode_digest_http_message(header, digest);
}
CURLcode Curl_output_digest(struct connectdata *conn,
bool proxy,
const unsigned char *request,
const unsigned char *uripath)
{
CURLcode result;
struct Curl_easy *data = conn->data;
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 = conn->http_proxy.user;
passwdp = conn->http_proxy.passwd;
authp = &data->state.authproxy;
#endif
}
else {
digest = &data->state.digest;
allocuserpwd = &data->state.aptr.userpwd;
userp = conn->user;
passwdp = conn->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;
path = (unsigned char *) aprintf("%.*s", 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