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Fix use of KKDCPP with SNI

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Resolves: #1365027
This commit is contained in:
Robbie Harwood 2016-08-10 17:21:39 +00:00
parent da7614606c
commit 766ee8e989
2 changed files with 117 additions and 1 deletions
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108
krb5-1.14.4-SNI-HTTP-Host.patch Normal file
View File

@ -0,0 +1,108 @@
From 69c8662190bcd46f2300d0cea139681001ea5b26 Mon Sep 17 00:00:00 2001
From: Christian Heimes <cheimes@redhat.com>
Date: Mon, 8 Aug 2016 12:38:17 +0200
Subject: [PATCH] Add Host HTTP header to MS-KKDCP requests
Some web servers require a Host HTTP header for TLS connections with
SNI (server name indicator). It is also required for virtual hosts.
ticket: 8472 (new)
target_version: 1.14-next
tags: pullup
---
src/lib/krb5/os/sendto_kdc.c | 18 +++++++++++++-----
1 file changed, 13 insertions(+), 5 deletions(-)
diff --git a/src/lib/krb5/os/sendto_kdc.c b/src/lib/krb5/os/sendto_kdc.c
index c85fdba..a2b7359 100644
--- a/src/lib/krb5/os/sendto_kdc.c
+++ b/src/lib/krb5/os/sendto_kdc.c
@@ -78,6 +78,7 @@
#define MAX_PASS 3
#define DEFAULT_UDP_PREF_LIMIT 1465
#define HARD_UDP_LIMIT 32700 /* could probably do 64K-epsilon ? */
+#define PORT_LENGTH 6 /* decimal repr of UINT16_MAX */
/* Select state flags. */
#define SSF_READ 0x01
@@ -138,6 +139,7 @@ struct conn_state {
struct {
const char *uri_path;
const char *servername;
+ char port[PORT_LENGTH];
char *https_request;
k5_tls_handle tls;
} http;
@@ -611,6 +613,8 @@ make_proxy_request(struct conn_state *state, const krb5_data *realm,
k5_buf_init_dynamic(&buf);
uri_path = (state->http.uri_path != NULL) ? state->http.uri_path : "";
k5_buf_add_fmt(&buf, "POST /%s HTTP/1.0\r\n", uri_path);
+ k5_buf_add_fmt(&buf, "Host: %s:%s\r\n", state->http.servername,
+ state->http.port);
k5_buf_add(&buf, "Cache-Control: no-cache\r\n");
k5_buf_add(&buf, "Pragma: no-cache\r\n");
k5_buf_add(&buf, "User-Agent: kerberos/1.0\r\n");
@@ -673,7 +677,7 @@ static krb5_error_code
add_connection(struct conn_state **conns, k5_transport transport,
krb5_boolean defer, struct addrinfo *ai, size_t server_index,
const krb5_data *realm, const char *hostname,
- const char *uri_path, char **udpbufp)
+ const char *port, const char *uri_path, char **udpbufp)
{
struct conn_state *state, **tailptr;
@@ -695,11 +699,13 @@ add_connection(struct conn_state **conns, k5_transport transport,
state->service_write = service_tcp_write;
state->service_read = service_tcp_read;
} else if (transport == HTTPS) {
+ assert(hostname != NULL && port != NULL);
state->service_connect = service_tcp_connect;
state->service_write = service_https_write;
state->service_read = service_https_read;
state->http.uri_path = uri_path;
state->http.servername = hostname;
+ strlcpy(state->http.port, port, PORT_LENGTH);
} else {
state->service_connect = NULL;
state->service_write = NULL;
@@ -785,7 +791,7 @@ resolve_server(krb5_context context, const krb5_data *realm,
struct addrinfo *addrs, *a, hint, ai;
krb5_boolean defer;
int err, result;
- char portbuf[64];
+ char portbuf[PORT_LENGTH];
/* Skip UDP entries if we don't want UDP. */
if (strategy == NO_UDP && entry->transport == UDP)
@@ -800,7 +806,7 @@ resolve_server(krb5_context context, const krb5_data *realm,
ai.ai_addr = (struct sockaddr *)&entry->addr;
defer = (entry->transport != transport);
return add_connection(conns, entry->transport, defer, &ai, ind, realm,
- NULL, entry->uri_path, udpbufp);
+ NULL, NULL, entry->uri_path, udpbufp);
}
/* If the entry has a specified transport, use it. */
@@ -826,7 +832,8 @@ resolve_server(krb5_context context, const krb5_data *realm,
retval = 0;
for (a = addrs; a != 0 && retval == 0; a = a->ai_next) {
retval = add_connection(conns, transport, FALSE, a, ind, realm,
- entry->hostname, entry->uri_path, udpbufp);
+ entry->hostname, portbuf, entry->uri_path,
+ udpbufp);
}
/* For TCP_OR_UDP entries, add each address again with the non-preferred
@@ -836,7 +843,8 @@ resolve_server(krb5_context context, const krb5_data *realm,
for (a = addrs; a != 0 && retval == 0; a = a->ai_next) {
a->ai_socktype = socktype_for_transport(transport);
retval = add_connection(conns, transport, TRUE, a, ind, realm,
- entry->hostname, entry->uri_path, udpbufp);
+ entry->hostname, portbuf,
+ entry->uri_path, udpbufp);
}
}
freeaddrinfo(addrs);
--
2.8.1

10
krb5.spec
View File

@ -13,7 +13,7 @@
Summary: The Kerberos network authentication system
Name: krb5
Version: 1.14.3
Release: 3%{?dist}
Release: 4%{?dist}
# - Maybe we should explode from the now-available-to-everybody tarball instead?
# http://web.mit.edu/kerberos/dist/krb5/1.13/krb5-1.13.2-signed.tar
# - The sources below are stored in a lookaside cache. Upload with
@ -63,6 +63,8 @@ Patch153: krb5-1.14.1-log_file_permissions.patch
Patch164: krb5-1.15-kdc_send_receive_hooks.patch
Patch165: krb5-1.15-kdc_hooks_test.patch
Patch166: krb5-1.14.4-SNI-HTTP-Host.patch
License: MIT
URL: http://web.mit.edu/kerberos/www/
Group: System Environment/Libraries
@ -270,6 +272,8 @@ ln NOTICE LICENSE
%patch164 -p1 -b .kdc_send_receive_hooks
%patch165 -p1 -b .kdc_hooks_test
%patch166 -p1 -b .krb5-1.14.4-SNI-HTTP-Host.patch
# Take the execute bit off of documentation.
chmod -x doc/krb5-protocol/*.txt doc/ccapi/*.html
@ -738,6 +742,10 @@ exit 0
%{_libdir}/libkadm5srv_mit.so.*
%changelog
* Wed Aug 10 2016 Robbie Harwood <rharwood@redhat.com> - 1.14.3-4
- Fix use of KKDCPP with SNI
- Resolves: #1365027
* Fri Aug 05 2016 Robbie Harwood <rharwood@redhat.com> - 1.14.3-3
- Make krb5-devel depend on libkadm5
- Resolves: #1364487