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libfetch: Retry with proxy auth when server returns 407

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PR:		220468
Submitted by:	Egil Hasting <egil.hasting@higen.org> (based on)
Reviewed by:	kevans, kp
Approved by:	kp
MFC after:	2 weeks
Sponsored by:	Rubicon Communications, LLC ("Netgate")
Differential Revision:	https://reviews.freebsd.org/D29533
This commit is contained in:
Renato Botelho 2021-04-01 18:02:57 -03:00
parent 9aef4e7c2b
commit 345c30a94f
1 changed files with 49 additions and 6 deletions
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55
lib/libfetch/http.c
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@ -73,6 +73,7 @@ __FBSDID("$FreeBSD$");
#include <locale.h>
#include <netdb.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
@ -1387,6 +1388,8 @@ http_connect(struct url *URL, struct url *purl, const char *flags)
int verbose;
int af, val;
int serrno;
bool isproxyauth = false;
http_auth_challenges_t proxy_challenges;
#ifdef INET6
af = AF_UNSPEC;
@ -1404,18 +1407,58 @@ http_connect(struct url *URL, struct url *purl, const char *flags)
curl = (purl != NULL) ? purl : URL;
retry:
if ((conn = fetch_connect(curl->host, curl->port, af, verbose)) == NULL)
/* fetch_connect() has already set an error code */
return (NULL);
init_http_headerbuf(&headerbuf);
if (strcmp(URL->scheme, SCHEME_HTTPS) == 0 && purl) {
http_cmd(conn, "CONNECT %s:%d HTTP/1.1",
URL->host, URL->port);
http_cmd(conn, "Host: %s:%d",
URL->host, URL->port);
init_http_auth_challenges(&proxy_challenges);
http_cmd(conn, "CONNECT %s:%d HTTP/1.1", URL->host, URL->port);
http_cmd(conn, "Host: %s:%d", URL->host, URL->port);
if (isproxyauth) {
http_auth_params_t aparams;
init_http_auth_params(&aparams);
if (*purl->user || *purl->pwd) {
aparams.user = strdup(purl->user);
aparams.password = strdup(purl->pwd);
} else if ((p = getenv("HTTP_PROXY_AUTH")) != NULL &&
*p != '\0') {
if (http_authfromenv(p, &aparams) < 0) {
http_seterr(HTTP_NEED_PROXY_AUTH);
fetch_syserr();
goto ouch;
}
} else if (fetch_netrc_auth(purl) == 0) {
aparams.user = strdup(purl->user);
aparams.password = strdup(purl->pwd);
} else {
/*
* No auth information found in system - exiting
* with warning.
*/
warnx("Missing username and/or password set");
fetch_syserr();
goto ouch;
}
http_authorize(conn, "Proxy-Authorization",
&proxy_challenges, &aparams, purl);
clean_http_auth_params(&aparams);
}
http_cmd(conn, "");
if (http_get_reply(conn) != HTTP_OK) {
http_seterr(conn->err);
/* Get reply from CONNECT Tunnel attempt */
int httpreply = http_get_reply(conn);
if (httpreply != HTTP_OK) {
http_seterr(httpreply);
/* If the error is a 407/HTTP_NEED_PROXY_AUTH */
if (httpreply == HTTP_NEED_PROXY_AUTH &&
! isproxyauth) {
/* Try again with authentication. */
clean_http_headerbuf(&headerbuf);
fetch_close(conn);
isproxyauth = true;
goto retry;
}
goto ouch;
}
/* Read and discard the rest of the proxy response */