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http.c
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http.c
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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) Daniel Stenberg, <[email protected]>, 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"
#ifndef CURL_DISABLE_HTTP
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif
#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#ifdef HAVE_NET_IF_H
#include <net/if.h>
#endif
#ifdef HAVE_SYS_IOCTL_H
#include <sys/ioctl.h>
#endif
#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
#ifdef USE_HYPER
#include <hyper.h>
#endif
#include "urldata.h"
#include <curl/curl.h>
#include "transfer.h"
#include "sendf.h"
#include "formdata.h"
#include "mime.h"
#include "progress.h"
#include "curl_base64.h"
#include "cookie.h"
#include "vauth/vauth.h"
#include "vtls/vtls.h"
#include "vquic/vquic.h"
#include "http_digest.h"
#include "http_ntlm.h"
#include "http_negotiate.h"
#include "http_aws_sigv4.h"
#include "url.h"
#include "share.h"
#include "hostip.h"
#include "dynhds.h"
#include "http.h"
#include "headers.h"
#include "select.h"
#include "parsedate.h" /* for the week day and month names */
#include "strtoofft.h"
#include "multiif.h"
#include "strcase.h"
#include "content_encoding.h"
#include "http_proxy.h"
#include "warnless.h"
#include "http2.h"
#include "cfilters.h"
#include "connect.h"
#include "strdup.h"
#include "altsvc.h"
#include "hsts.h"
#include "ws.h"
#include "c-hyper.h"
#include "curl_ctype.h"
/* The last 3 #include files should be in this order */
#include "curl_printf.h"
#include "curl_memory.h"
#include "memdebug.h"
/*
* Forward declarations.
*/
static bool http_should_fail(struct Curl_easy *data, int httpcode);
static bool http_exp100_is_waiting(struct Curl_easy *data);
static CURLcode http_exp100_add_reader(struct Curl_easy *data);
static void http_exp100_send_anyway(struct Curl_easy *data);
/*
* HTTP handler interface.
*/
const struct Curl_handler Curl_handler_http = {
"http", /* scheme */
Curl_http_setup_conn, /* setup_connection */
Curl_http, /* do_it */
Curl_http_done, /* done */
ZERO_NULL, /* do_more */
Curl_http_connect, /* connect_it */
ZERO_NULL, /* connecting */
ZERO_NULL, /* doing */
ZERO_NULL, /* proto_getsock */
Curl_http_getsock_do, /* doing_getsock */
ZERO_NULL, /* domore_getsock */
ZERO_NULL, /* perform_getsock */
ZERO_NULL, /* disconnect */
Curl_http_write_resp, /* write_resp */
Curl_http_write_resp_hd, /* write_resp_hd */
ZERO_NULL, /* connection_check */
ZERO_NULL, /* attach connection */
PORT_HTTP, /* defport */
CURLPROTO_HTTP, /* protocol */
CURLPROTO_HTTP, /* family */
PROTOPT_CREDSPERREQUEST | /* flags */
PROTOPT_USERPWDCTRL
};
#ifdef USE_SSL
/*
* HTTPS handler interface.
*/
const struct Curl_handler Curl_handler_https = {
"https", /* scheme */
Curl_http_setup_conn, /* setup_connection */
Curl_http, /* do_it */
Curl_http_done, /* done */
ZERO_NULL, /* do_more */
Curl_http_connect, /* connect_it */
NULL, /* connecting */
ZERO_NULL, /* doing */
NULL, /* proto_getsock */
Curl_http_getsock_do, /* doing_getsock */
ZERO_NULL, /* domore_getsock */
ZERO_NULL, /* perform_getsock */
ZERO_NULL, /* disconnect */
Curl_http_write_resp, /* write_resp */
Curl_http_write_resp_hd, /* write_resp_hd */
ZERO_NULL, /* connection_check */
ZERO_NULL, /* attach connection */
PORT_HTTPS, /* defport */
CURLPROTO_HTTPS, /* protocol */
CURLPROTO_HTTP, /* family */
PROTOPT_SSL | PROTOPT_CREDSPERREQUEST | PROTOPT_ALPN | /* flags */
PROTOPT_USERPWDCTRL
};
#endif
CURLcode Curl_http_setup_conn(struct Curl_easy *data,
struct connectdata *conn)
{
/* allocate the HTTP-specific struct for the Curl_easy, only to survive
during this request */
connkeep(conn, "HTTP default");
if(data->state.httpwant == CURL_HTTP_VERSION_3ONLY) {
CURLcode result = Curl_conn_may_http3(data, conn);
if(result)
return result;
}
return CURLE_OK;
}
#ifndef CURL_DISABLE_PROXY
/*
* checkProxyHeaders() checks the linked list of custom proxy headers
* if proxy headers are not available, then it will lookup into http header
* link list
*
* It takes a connectdata struct as input to see if this is a proxy request or
* not, as it then might check a different header list. Provide the header
* prefix without colon!
*/
char *Curl_checkProxyheaders(struct Curl_easy *data,
const struct connectdata *conn,
const char *thisheader,
const size_t thislen)
{
struct curl_slist *head;
for(head = (conn->bits.proxy && data->set.sep_headers) ?
data->set.proxyheaders : data->set.headers;
head; head = head->next) {
if(strncasecompare(head->data, thisheader, thislen) &&
Curl_headersep(head->data[thislen]))
return head->data;
}
return NULL;
}
#else
/* disabled */
#define Curl_checkProxyheaders(x,y,z,a) NULL
#endif
/*
* Strip off leading and trailing whitespace from the value in the
* given HTTP header line and return a strdupped copy. Returns NULL in
* case of allocation failure. Returns an empty string if the header value
* consists entirely of whitespace.
*/
char *Curl_copy_header_value(const char *header)
{
const char *start;
const char *end;
size_t len;
/* Find the end of the header name */
while(*header && (*header != ':'))
++header;
if(*header)
/* Skip over colon */
++header;
/* Find the first non-space letter */
start = header;
while(*start && ISSPACE(*start))
start++;
end = strchr(start, '\r');
if(!end)
end = strchr(start, '\n');
if(!end)
end = strchr(start, '\0');
if(!end)
return NULL;
/* skip all trailing space letters */
while((end > start) && ISSPACE(*end))
end--;
/* get length of the type */
len = end - start + 1;
return Curl_memdup0(start, len);
}
#ifndef CURL_DISABLE_HTTP_AUTH
#ifndef CURL_DISABLE_BASIC_AUTH
/*
* http_output_basic() sets up an Authorization: header (or the proxy version)
* for HTTP Basic authentication.
*
* Returns CURLcode.
*/
static CURLcode http_output_basic(struct Curl_easy *data, bool proxy)
{
size_t size = 0;
char *authorization = NULL;
char **userp;
const char *user;
const char *pwd;
CURLcode result;
char *out;
/* credentials are unique per transfer for HTTP, do not use the ones for the
connection */
if(proxy) {
#ifndef CURL_DISABLE_PROXY
userp = &data->state.aptr.proxyuserpwd;
user = data->state.aptr.proxyuser;
pwd = data->state.aptr.proxypasswd;
#else
return CURLE_NOT_BUILT_IN;
#endif
}
else {
userp = &data->state.aptr.userpwd;
user = data->state.aptr.user;
pwd = data->state.aptr.passwd;
}
out = aprintf("%s:%s", user ? user : "", pwd ? pwd : "");
if(!out)
return CURLE_OUT_OF_MEMORY;
result = Curl_base64_encode(out, strlen(out), &authorization, &size);
if(result)
goto fail;
if(!authorization) {
result = CURLE_REMOTE_ACCESS_DENIED;
goto fail;
}
free(*userp);
*userp = aprintf("%sAuthorization: Basic %s\r\n",
proxy ? "Proxy-" : "",
authorization);
free(authorization);
if(!*userp) {
result = CURLE_OUT_OF_MEMORY;
goto fail;
}
fail:
free(out);
return result;
}
#endif
#ifndef CURL_DISABLE_BEARER_AUTH
/*
* http_output_bearer() sets up an Authorization: header
* for HTTP Bearer authentication.
*
* Returns CURLcode.
*/
static CURLcode http_output_bearer(struct Curl_easy *data)
{
char **userp;
CURLcode result = CURLE_OK;
userp = &data->state.aptr.userpwd;
free(*userp);
*userp = aprintf("Authorization: Bearer %s\r\n",
data->set.str[STRING_BEARER]);
if(!*userp) {
result = CURLE_OUT_OF_MEMORY;
goto fail;
}
fail:
return result;
}
#endif
#endif
/* pickoneauth() selects the most favourable authentication method from the
* ones available and the ones we want.
*
* return TRUE if one was picked
*/
static bool pickoneauth(struct auth *pick, unsigned long mask)
{
bool picked;
/* only deal with authentication we want */
unsigned long avail = pick->avail & pick->want & mask;
picked = TRUE;
/* The order of these checks is highly relevant, as this will be the order
of preference in case of the existence of multiple accepted types. */
if(avail & CURLAUTH_NEGOTIATE)
pick->picked = CURLAUTH_NEGOTIATE;
#ifndef CURL_DISABLE_BEARER_AUTH
else if(avail & CURLAUTH_BEARER)
pick->picked = CURLAUTH_BEARER;
#endif
#ifndef CURL_DISABLE_DIGEST_AUTH
else if(avail & CURLAUTH_DIGEST)
pick->picked = CURLAUTH_DIGEST;
#endif
else if(avail & CURLAUTH_NTLM)
pick->picked = CURLAUTH_NTLM;
#ifndef CURL_DISABLE_BASIC_AUTH
else if(avail & CURLAUTH_BASIC)
pick->picked = CURLAUTH_BASIC;
#endif
#ifndef CURL_DISABLE_AWS
else if(avail & CURLAUTH_AWS_SIGV4)
pick->picked = CURLAUTH_AWS_SIGV4;
#endif
else {
pick->picked = CURLAUTH_PICKNONE; /* we select to use nothing */
picked = FALSE;
}
pick->avail = CURLAUTH_NONE; /* clear it here */
return picked;
}
/*
* http_perhapsrewind()
*
* The current request needs to be done again - maybe due to a follow
* or authentication negotiation. Check if:
* 1) a rewind of the data sent to the server is necessary
* 2) the current transfer should continue or be stopped early
*/
static CURLcode http_perhapsrewind(struct Curl_easy *data,
struct connectdata *conn)
{
curl_off_t bytessent = data->req.writebytecount;
curl_off_t expectsend = Curl_creader_total_length(data);
curl_off_t upload_remain = (expectsend >= 0) ? (expectsend - bytessent) : -1;
bool little_upload_remains = (upload_remain >= 0 && upload_remain < 2000);
bool needs_rewind = Curl_creader_needs_rewind(data);
/* By default, we would like to abort the transfer when little or unknown
* amount remains. This may be overridden by authentications further
* below! */
bool abort_upload = (!data->req.upload_done && !little_upload_remains);
const char *ongoing_auth = NULL;
/* We need a rewind before uploading client read data again. The
* checks below just influence of the upload is to be continued
* or aborted early.
* This depends on how much remains to be sent and in what state
* the authentication is. Some auth schemes such as NTLM do not work
* for a new connection. */
if(needs_rewind) {
infof(data, "Need to rewind upload for next request");
Curl_creader_set_rewind(data, TRUE);
}
if(conn->bits.close)
/* If we already decided to close this connection, we cannot veto. */
return CURLE_OK;
if(abort_upload) {
/* We'd like to abort the upload - but should we? */
#if defined(USE_NTLM)
if((data->state.authproxy.picked == CURLAUTH_NTLM) ||
(data->state.authhost.picked == CURLAUTH_NTLM)) {
ongoing_auth = "NTML";
if((conn->http_ntlm_state != NTLMSTATE_NONE) ||
(conn->proxy_ntlm_state != NTLMSTATE_NONE)) {
/* The NTLM-negotiation has started, keep on sending.
* Need to do further work on same connection */
abort_upload = FALSE;
}
}
#endif
#if defined(USE_SPNEGO)
/* There is still data left to send */
if((data->state.authproxy.picked == CURLAUTH_NEGOTIATE) ||
(data->state.authhost.picked == CURLAUTH_NEGOTIATE)) {
ongoing_auth = "NEGOTIATE";
if((conn->http_negotiate_state != GSS_AUTHNONE) ||
(conn->proxy_negotiate_state != GSS_AUTHNONE)) {
/* The NEGOTIATE-negotiation has started, keep on sending.
* Need to do further work on same connection */
abort_upload = FALSE;
}
}
#endif
}
if(abort_upload) {
if(upload_remain >= 0)
infof(data, "%s%sclose instead of sending %" FMT_OFF_T " more bytes",
ongoing_auth ? ongoing_auth : "",
ongoing_auth ? " send, " : "",
upload_remain);
else
infof(data, "%s%sclose instead of sending unknown amount "
"of more bytes",
ongoing_auth ? ongoing_auth : "",
ongoing_auth ? " send, " : "");
/* We decided to abort the ongoing transfer */
streamclose(conn, "Mid-auth HTTP and much data left to send");
/* FIXME: questionable manipulation here, can we do this differently? */
data->req.size = 0; /* do not download any more than 0 bytes */
}
return CURLE_OK;
}
/*
* Curl_http_auth_act() gets called when all HTTP headers have been received
* and it checks what authentication methods that are available and decides
* which one (if any) to use. It will set 'newurl' if an auth method was
* picked.
*/
CURLcode Curl_http_auth_act(struct Curl_easy *data)
{
struct connectdata *conn = data->conn;
bool pickhost = FALSE;
bool pickproxy = FALSE;
CURLcode result = CURLE_OK;
unsigned long authmask = ~0ul;
if(!data->set.str[STRING_BEARER])
authmask &= (unsigned long)~CURLAUTH_BEARER;
if(100 <= data->req.httpcode && data->req.httpcode <= 199)
/* this is a transient response code, ignore */
return CURLE_OK;
if(data->state.authproblem)
return data->set.http_fail_on_error ? CURLE_HTTP_RETURNED_ERROR : CURLE_OK;
if((data->state.aptr.user || data->set.str[STRING_BEARER]) &&
((data->req.httpcode == 401) ||
(data->req.authneg && data->req.httpcode < 300))) {
pickhost = pickoneauth(&data->state.authhost, authmask);
if(!pickhost)
data->state.authproblem = TRUE;
if(data->state.authhost.picked == CURLAUTH_NTLM &&
conn->httpversion > 11) {
infof(data, "Forcing HTTP/1.1 for NTLM");
connclose(conn, "Force HTTP/1.1 connection");
data->state.httpwant = CURL_HTTP_VERSION_1_1;
}
}
#ifndef CURL_DISABLE_PROXY
if(conn->bits.proxy_user_passwd &&
((data->req.httpcode == 407) ||
(data->req.authneg && data->req.httpcode < 300))) {
pickproxy = pickoneauth(&data->state.authproxy,
authmask & ~CURLAUTH_BEARER);
if(!pickproxy)
data->state.authproblem = TRUE;
}
#endif
if(pickhost || pickproxy) {
result = http_perhapsrewind(data, conn);
if(result)
return result;
/* In case this is GSS auth, the newurl field is already allocated so
we must make sure to free it before allocating a new one. As figured
out in bug #2284386 */
Curl_safefree(data->req.newurl);
data->req.newurl = strdup(data->state.url); /* clone URL */
if(!data->req.newurl)
return CURLE_OUT_OF_MEMORY;
}
else if((data->req.httpcode < 300) &&
(!data->state.authhost.done) &&
data->req.authneg) {
/* no (known) authentication available,
authentication is not "done" yet and
no authentication seems to be required and
we did not try HEAD or GET */
if((data->state.httpreq != HTTPREQ_GET) &&
(data->state.httpreq != HTTPREQ_HEAD)) {
data->req.newurl = strdup(data->state.url); /* clone URL */
if(!data->req.newurl)
return CURLE_OUT_OF_MEMORY;
data->state.authhost.done = TRUE;
}
}
if(http_should_fail(data, data->req.httpcode)) {
failf(data, "The requested URL returned error: %d",
data->req.httpcode);
result = CURLE_HTTP_RETURNED_ERROR;
}
return result;
}
#ifndef CURL_DISABLE_HTTP_AUTH
/*
* Output the correct authentication header depending on the auth type
* and whether or not it is to a proxy.
*/
static CURLcode
output_auth_headers(struct Curl_easy *data,
struct connectdata *conn,
struct auth *authstatus,
const char *request,
const char *path,
bool proxy)
{
const char *auth = NULL;
CURLcode result = CURLE_OK;
(void)conn;
#ifdef CURL_DISABLE_DIGEST_AUTH
(void)request;
(void)path;
#endif
#ifndef CURL_DISABLE_AWS
if(authstatus->picked == CURLAUTH_AWS_SIGV4) {
auth = "AWS_SIGV4";
result = Curl_output_aws_sigv4(data, proxy);
if(result)
return result;
}
else
#endif
#ifdef USE_SPNEGO
if(authstatus->picked == CURLAUTH_NEGOTIATE) {
auth = "Negotiate";
result = Curl_output_negotiate(data, conn, proxy);
if(result)
return result;
}
else
#endif
#ifdef USE_NTLM
if(authstatus->picked == CURLAUTH_NTLM) {
auth = "NTLM";
result = Curl_output_ntlm(data, proxy);
if(result)
return result;
}
else
#endif
#ifndef CURL_DISABLE_DIGEST_AUTH
if(authstatus->picked == CURLAUTH_DIGEST) {
auth = "Digest";
result = Curl_output_digest(data,
proxy,
(const unsigned char *)request,
(const unsigned char *)path);
if(result)
return result;
}
else
#endif
#ifndef CURL_DISABLE_BASIC_AUTH
if(authstatus->picked == CURLAUTH_BASIC) {
/* Basic */
if(
#ifndef CURL_DISABLE_PROXY
(proxy && conn->bits.proxy_user_passwd &&
!Curl_checkProxyheaders(data, conn, STRCONST("Proxy-authorization"))) ||
#endif
(!proxy && data->state.aptr.user &&
!Curl_checkheaders(data, STRCONST("Authorization")))) {
auth = "Basic";
result = http_output_basic(data, proxy);
if(result)
return result;
}
/* NOTE: this function should set 'done' TRUE, as the other auth
functions work that way */
authstatus->done = TRUE;
}
#endif
#ifndef CURL_DISABLE_BEARER_AUTH
if(authstatus->picked == CURLAUTH_BEARER) {
/* Bearer */
if((!proxy && data->set.str[STRING_BEARER] &&
!Curl_checkheaders(data, STRCONST("Authorization")))) {
auth = "Bearer";
result = http_output_bearer(data);
if(result)
return result;
}
/* NOTE: this function should set 'done' TRUE, as the other auth
functions work that way */
authstatus->done = TRUE;
}
#endif
if(auth) {
#ifndef CURL_DISABLE_PROXY
infof(data, "%s auth using %s with user '%s'",
proxy ? "Proxy" : "Server", auth,
proxy ? (data->state.aptr.proxyuser ?
data->state.aptr.proxyuser : "") :
(data->state.aptr.user ?
data->state.aptr.user : ""));
#else
(void)proxy;
infof(data, "Server auth using %s with user '%s'",
auth, data->state.aptr.user ?
data->state.aptr.user : "");
#endif
authstatus->multipass = !authstatus->done;
}
else
authstatus->multipass = FALSE;
return result;
}
/**
* Curl_http_output_auth() setups the authentication headers for the
* host/proxy and the correct authentication
* method. data->state.authdone is set to TRUE when authentication is
* done.
*
* @param conn all information about the current connection
* @param request pointer to the request keyword
* @param path pointer to the requested path; should include query part
* @param proxytunnel boolean if this is the request setting up a "proxy
* tunnel"
*
* @returns CURLcode
*/
CURLcode
Curl_http_output_auth(struct Curl_easy *data,
struct connectdata *conn,
const char *request,
Curl_HttpReq httpreq,
const char *path,
bool proxytunnel) /* TRUE if this is the request setting
up the proxy tunnel */
{
CURLcode result = CURLE_OK;
struct auth *authhost;
struct auth *authproxy;
DEBUGASSERT(data);
authhost = &data->state.authhost;
authproxy = &data->state.authproxy;
if(
#ifndef CURL_DISABLE_PROXY
(conn->bits.httpproxy && conn->bits.proxy_user_passwd) ||
#endif
data->state.aptr.user ||
#ifdef USE_SPNEGO
authhost->want & CURLAUTH_NEGOTIATE ||
authproxy->want & CURLAUTH_NEGOTIATE ||
#endif
data->set.str[STRING_BEARER])
/* continue please */;
else {
authhost->done = TRUE;
authproxy->done = TRUE;
return CURLE_OK; /* no authentication with no user or password */
}
if(authhost->want && !authhost->picked)
/* The app has selected one or more methods, but none has been picked
so far by a server round-trip. Then we set the picked one to the
want one, and if this is one single bit it will be used instantly. */
authhost->picked = authhost->want;
if(authproxy->want && !authproxy->picked)
/* The app has selected one or more methods, but none has been picked so
far by a proxy round-trip. Then we set the picked one to the want one,
and if this is one single bit it will be used instantly. */
authproxy->picked = authproxy->want;
#ifndef CURL_DISABLE_PROXY
/* Send proxy authentication header if needed */
if(conn->bits.httpproxy &&
(conn->bits.tunnel_proxy == (bit)proxytunnel)) {
result = output_auth_headers(data, conn, authproxy, request, path, TRUE);
if(result)
return result;
}
else
#else
(void)proxytunnel;
#endif /* CURL_DISABLE_PROXY */
/* we have no proxy so let's pretend we are done authenticating
with it */
authproxy->done = TRUE;
/* To prevent the user+password to get sent to other than the original host
due to a location-follow */
if(Curl_auth_allowed_to_host(data)
#ifndef CURL_DISABLE_NETRC
|| conn->bits.netrc
#endif
)
result = output_auth_headers(data, conn, authhost, request, path, FALSE);
else
authhost->done = TRUE;
if(((authhost->multipass && !authhost->done) ||
(authproxy->multipass && !authproxy->done)) &&
(httpreq != HTTPREQ_GET) &&
(httpreq != HTTPREQ_HEAD)) {
/* Auth is required and we are not authenticated yet. Make a PUT or POST
with content-length zero as a "probe". */
data->req.authneg = TRUE;
}
else
data->req.authneg = FALSE;
return result;
}
#else
/* when disabled */
CURLcode
Curl_http_output_auth(struct Curl_easy *data,
struct connectdata *conn,
const char *request,
Curl_HttpReq httpreq,
const char *path,
bool proxytunnel)
{
(void)data;
(void)conn;
(void)request;
(void)httpreq;
(void)path;
(void)proxytunnel;
return CURLE_OK;
}
#endif
#if defined(USE_SPNEGO) || defined(USE_NTLM) || \
!defined(CURL_DISABLE_DIGEST_AUTH) || \
!defined(CURL_DISABLE_BASIC_AUTH) || \
!defined(CURL_DISABLE_BEARER_AUTH)
static int is_valid_auth_separator(char ch)
{
return ch == '\0' || ch == ',' || ISSPACE(ch);
}
#endif
/*
* Curl_http_input_auth() deals with Proxy-Authenticate: and WWW-Authenticate:
* headers. They are dealt with both in the transfer.c main loop and in the
* proxy CONNECT loop.
*/
CURLcode Curl_http_input_auth(struct Curl_easy *data, bool proxy,
const char *auth) /* the first non-space */
{
/*
* This resource requires authentication
*/
struct connectdata *conn = data->conn;
#ifdef USE_SPNEGO
curlnegotiate *negstate = proxy ? &conn->proxy_negotiate_state :
&conn->http_negotiate_state;
#endif
#if defined(USE_SPNEGO) || \
defined(USE_NTLM) || \
!defined(CURL_DISABLE_DIGEST_AUTH) || \
!defined(CURL_DISABLE_BASIC_AUTH) || \
!defined(CURL_DISABLE_BEARER_AUTH)
unsigned long *availp;
struct auth *authp;
if(proxy) {
availp = &data->info.proxyauthavail;
authp = &data->state.authproxy;
}
else {
availp = &data->info.httpauthavail;
authp = &data->state.authhost;
}
#else
(void) proxy;
#endif
(void) conn; /* In case conditionals make it unused. */
/*
* Here we check if we want the specific single authentication (using ==) and
* if we do, we initiate usage of it.
*
* If the provided authentication is wanted as one out of several accepted
* types (using &), we OR this authentication type to the authavail
* variable.
*
* Note:
*
* ->picked is first set to the 'want' value (one or more bits) before the
* request is sent, and then it is again set _after_ all response 401/407
* headers have been received but then only to a single preferred method
* (bit).
*/
while(*auth) {
#ifdef USE_SPNEGO
if(checkprefix("Negotiate", auth) && is_valid_auth_separator(auth[9])) {
if((authp->avail & CURLAUTH_NEGOTIATE) ||
Curl_auth_is_spnego_supported()) {
*availp |= CURLAUTH_NEGOTIATE;
authp->avail |= CURLAUTH_NEGOTIATE;
if(authp->picked == CURLAUTH_NEGOTIATE) {
CURLcode result = Curl_input_negotiate(data, conn, proxy, auth);
if(!result) {
free(data->req.newurl);
data->req.newurl = strdup(data->state.url);
if(!data->req.newurl)
return CURLE_OUT_OF_MEMORY;
data->state.authproblem = FALSE;
/* we received a GSS auth token and we dealt with it fine */
*negstate = GSS_AUTHRECV;
}
else
data->state.authproblem = TRUE;
}
}
}
else
#endif
#ifdef USE_NTLM
/* NTLM support requires the SSL crypto libs */
if(checkprefix("NTLM", auth) && is_valid_auth_separator(auth[4])) {
if((authp->avail & CURLAUTH_NTLM) ||
Curl_auth_is_ntlm_supported()) {
*availp |= CURLAUTH_NTLM;
authp->avail |= CURLAUTH_NTLM;
if(authp->picked == CURLAUTH_NTLM) {
/* NTLM authentication is picked and activated */
CURLcode result = Curl_input_ntlm(data, proxy, auth);
if(!result) {
data->state.authproblem = FALSE;
}
else {
infof(data, "Authentication problem. Ignoring this.");
data->state.authproblem = TRUE;
}
}
}
}
else
#endif
#ifndef CURL_DISABLE_DIGEST_AUTH
if(checkprefix("Digest", auth) && is_valid_auth_separator(auth[6])) {
if((authp->avail & CURLAUTH_DIGEST) != 0)
infof(data, "Ignoring duplicate digest auth header.");
else if(Curl_auth_is_digest_supported()) {
CURLcode result;
*availp |= CURLAUTH_DIGEST;
authp->avail |= CURLAUTH_DIGEST;
/* We call this function on input Digest headers even if Digest
* authentication is not activated yet, as we need to store the
* incoming data from this header in case we are going to use
* Digest */
result = Curl_input_digest(data, proxy, auth);
if(result) {
infof(data, "Authentication problem. Ignoring this.");
data->state.authproblem = TRUE;
}
}
}
else
#endif
#ifndef CURL_DISABLE_BASIC_AUTH
if(checkprefix("Basic", auth) &&
is_valid_auth_separator(auth[5])) {
*availp |= CURLAUTH_BASIC;
authp->avail |= CURLAUTH_BASIC;
if(authp->picked == CURLAUTH_BASIC) {
/* We asked for Basic authentication but got a 40X back
anyway, which basically means our name+password is not
valid. */
authp->avail = CURLAUTH_NONE;
infof(data, "Authentication problem. Ignoring this.");
data->state.authproblem = TRUE;
}
}
else
#endif
#ifndef CURL_DISABLE_BEARER_AUTH
if(checkprefix("Bearer", auth) &&
is_valid_auth_separator(auth[6])) {
*availp |= CURLAUTH_BEARER;
authp->avail |= CURLAUTH_BEARER;
if(authp->picked == CURLAUTH_BEARER) {
/* We asked for Bearer authentication but got a 40X back
anyway, which basically means our token is not valid. */
authp->avail = CURLAUTH_NONE;
infof(data, "Authentication problem. Ignoring this.");
data->state.authproblem = TRUE;
}
}
#else
{
/*
* Empty block to terminate the if-else chain correctly.
*
* A semicolon would yield the same result here, but can cause a
* compiler warning when -Wextra is enabled.
*/
}
#endif
/* there may be multiple methods on one line, so keep reading */
while(*auth && *auth != ',') /* read up to the next comma */
auth++;
if(*auth == ',') /* if we are on a comma, skip it */
auth++;
while(*auth && ISSPACE(*auth))
auth++;
}
return CURLE_OK;
}
/**
* http_should_fail() determines whether an HTTP response code has gotten us