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klara-ports/security/openssh-portable/files/extra-patch-hpn

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diff -urN -x configure -x config.guess -x config.h.in -x config.sub work.clean/openssh-6.8p1/HPN-README work/openssh-6.8p1/HPN-README
--- work.clean/openssh-6.8p1/HPN-README 1969-12-31 18:00:00.000000000 -0600
+++ work/openssh-6.8p1/HPN-README 2015-04-01 22:16:49.869215000 -0500
@@ -0,0 +1,129 @@
+Notes:
+
+MULTI-THREADED CIPHER:
+The AES cipher in CTR mode has been multithreaded (MTR-AES-CTR). This will allow ssh installations
+on hosts with multiple cores to use more than one processing core during encryption.
+Tests have show significant throughput performance increases when using MTR-AES-CTR up
+to and including a full gigabit per second on quad core systems. It should be possible to
+achieve full line rate on dual core systems but OS and data management overhead makes this
+more difficult to achieve. The cipher stream from MTR-AES-CTR is entirely compatible with single
+thread AES-CTR (ST-AES-CTR) implementations and should be 100% backward compatible. Optimal
+performance requires the MTR-AES-CTR mode be enabled on both ends of the connection.
+The MTR-AES-CTR replaces ST-AES-CTR and is used in exactly the same way with the same
+nomenclature.
+Use examples: ssh -caes128-ctr you@host.com
+ scp -oCipher=aes256-ctr file you@host.com:~/file
+
+NONE CIPHER:
+To use the NONE option you must have the NoneEnabled switch set on the server and
+you *must* have *both* NoneEnabled and NoneSwitch set to yes on the client. The NONE
+feature works with ALL ssh subsystems (as far as we can tell) *AS LONG AS* a tty is not
+spawned. If a user uses the -T switch to prevent a tty being created the NONE cipher will
+be disabled.
+
+The performance increase will only be as good as the network and TCP stack tuning
+on the reciever side of the connection allows. As a rule of thumb a user will need
+at least 10Mb/s connection with a 100ms RTT to see a doubling of performance. The
+HPN-SSH home page describes this in greater detail.
+
+http://www.psc.edu/networking/projects/hpn-ssh
+
+BUFFER SIZES:
+
+If HPN is disabled the receive buffer size will be set to the
+OpenSSH default of 64K.
+
+If an HPN system connects to a nonHPN system the receive buffer will
+be set to the HPNBufferSize value. The default is 2MB but user adjustable.
+
+If an HPN to HPN connection is established a number of different things might
+happen based on the user options and conditions.
+
+Conditions: HPNBufferSize NOT Set, TCPRcvBufPoll enabled, TCPRcvBuf NOT Set
+HPN Buffer Size = up to 64MB
+This is the default state. The HPN buffer size will grow to a maximum of 64MB
+as the TCP receive buffer grows. The maximum HPN Buffer size of 64MB is
+geared towards 10GigE transcontinental connections.
+
+Conditions: HPNBufferSize NOT Set, TCPRcvBufPoll disabled, TCPRcvBuf NOT Set
+HPN Buffer Size = TCP receive buffer value.
+Users on non-autotuning systesm should disable TCPRcvBufPoll in the
+ssh_cofig and sshd_config
+
+Conditions: HPNBufferSize SET, TCPRcvBufPoll disabled, TCPRcvBuf NOT Set
+HPN Buffer Size = minmum of TCP receive buffer and HPNBufferSize.
+This would be the system defined TCP receive buffer (RWIN).
+
+Conditions: HPNBufferSize SET, TCPRcvBufPoll disabled, TCPRcvBuf SET
+HPN Buffer Size = minmum of TCPRcvBuf and HPNBufferSize.
+Generally there is no need to set both.
+
+Conditions: HPNBufferSize SET, TCPRcvBufPoll enabled, TCPRcvBuf NOT Set
+HPN Buffer Size = grows to HPNBufferSize
+The buffer will grow up to the maximum size specified here.
+
+Conditions: HPNBufferSize SET, TCPRcvBufPoll enabled, TCPRcvBuf SET
+HPN Buffer Size = minmum of TCPRcvBuf and HPNBufferSize.
+Generally there is no need to set both of these, especially on autotuning
+systems. However, if the users wishes to override the autotuning this would be
+one way to do it.
+
+Conditions: HPNBufferSize NOT Set, TCPRcvBufPoll enabled, TCPRcvBuf SET
+HPN Buffer Size = TCPRcvBuf.
+This will override autotuning and set the TCP recieve buffer to the user defined
+value.
+
+
+HPN Specific Configuration options
+
+TcpRcvBuf=[int]KB client
+ set the TCP socket receive buffer to n Kilobytes. It can be set up to the
+maximum socket size allowed by the system. This is useful in situations where
+the tcp receive window is set low but the maximum buffer size is set
+higher (as is typical). This works on a per TCP connection basis. You can also
+use this to artifically limit the transfer rate of the connection. In these
+cases the throughput will be no more than n/RTT. The minimum buffer size is 1KB.
+Default is the current system wide tcp receive buffer size.
+
+TcpRcvBufPoll=[yes/no] client/server
+ enable of disable the polling of the tcp receive buffer through the life
+of the connection. You would want to make sure that this option is enabled
+for systems making use of autotuning kernels (linux 2.4.24+, 2.6, MS Vista)
+default is yes.
+
+NoneEnabled=[yes/no] client/server
+ enable or disable the use of the None cipher. Care must always be used
+when enabling this as it will allow users to send data in the clear. However,
+it is important to note that authentication information remains encrypted
+even if this option is enabled. Set to no by default.
+
+NoneSwitch=[yes/no] client
+ Switch the encryption cipher being used to the None cipher after
+authentication takes place. NoneEnabled must be enabled on both the client
+and server side of the connection. When the connection switches to the NONE
+cipher a warning is sent to STDERR. The connection attempt will fail with an
+error if a client requests a NoneSwitch from the server that does not explicitly
+have NoneEnabled set to yes. Note: The NONE cipher cannot be used in
+interactive (shell) sessions and it will fail silently. Set to no by default.
+
+HPNDisabled=[yes/no] client/server
+ In some situations, such as transfers on a local area network, the impact
+of the HPN code produces a net decrease in performance. In these cases it is
+helpful to disable the HPN functionality. By default HPNDisabled is set to no.
+
+HPNBufferSize=[int]KB client/server
+ This is the default buffer size the HPN functionality uses when interacting
+with nonHPN SSH installations. Conceptually this is similar to the TcpRcvBuf
+option as applied to the internal SSH flow control. This value can range from
+1KB to 64MB (1-65536). Use of oversized or undersized buffers can cause performance
+problems depending on the length of the network path. The default size of this buffer
+is 2MB.
+
+
+Credits: This patch was conceived, designed, and led by Chris Rapier (rapier@psc.edu)
+ The majority of the actual coding for versions up to HPN12v1 was performed
+ by Michael Stevens (mstevens@andrew.cmu.edu). The MT-AES-CTR cipher was
+ implemented by Ben Bennet (ben@psc.edu) and improved by Mike Tasota
+ (tasota@gmail.com) an NSF REU grant recipient for 2013.
+ This work was financed, in part, by Cisco System, Inc., the National
+ Library of Medicine, and the National Science Foundation.
--- channels.c.orig 2023-02-02 04:21:54.000000000 -0800
+++ channels.c 2023-02-03 10:45:34.136793000 -0800
@@ -229,6 +229,12 @@ static void channel_handler_init(struct ssh_channels *
/* Setup helper */
static void channel_handler_init(struct ssh_channels *sc);
+
+#ifdef HPN_ENABLED
+static int hpn_disabled = 0;
+static int hpn_buffer_size = 2 * 1024 * 1024;
+#endif
+
/* -- channel core */
void
@@ -495,6 +501,9 @@ channel_new(struct ssh *ssh, char *ctype, int type, in
c->local_window = window;
c->local_window_max = window;
c->local_maxpacket = maxpack;
+#ifdef HPN_ENABLED
+ c->dynamic_window = 0;
+#endif
c->remote_name = xstrdup(remote_name);
c->ctl_chan = -1;
c->delayed = 1; /* prevent call to channel_post handler */
@@ -1190,6 +1199,30 @@ channel_set_fds(struct ssh *ssh, int id, int rfd, int
fatal_fr(r, "channel %i", c->self);
}
+#ifdef HPN_ENABLED
+static int
+channel_tcpwinsz(struct ssh *ssh)
+{
+ u_int32_t tcpwinsz = 0;
+ socklen_t optsz = sizeof(tcpwinsz);
+ int ret = -1;
+
+ /* if we aren't on a socket return 128KB */
+ if (!ssh_packet_connection_is_on_socket(ssh))
+ return 128 * 1024;
+
+ ret = getsockopt(ssh_packet_get_connection_in(ssh),
+ SOL_SOCKET, SO_RCVBUF, &tcpwinsz, &optsz);
+ /* return no more than SSHBUF_SIZE_MAX (currently 256MB) */
+ if ((ret == 0) && tcpwinsz > SSHBUF_SIZE_MAX)
+ tcpwinsz = SSHBUF_SIZE_MAX;
+
+ debug2("tcpwinsz: tcp connection %d, Receive window: %d",
+ ssh_packet_get_connection_in(ssh), tcpwinsz);
+ return tcpwinsz;
+}
+#endif
+
static void
channel_pre_listener(struct ssh *ssh, Channel *c)
{
@@ -2301,18 +2334,29 @@ channel_check_window(struct ssh *ssh, Channel *c)
c->local_maxpacket*3) ||
c->local_window < c->local_window_max/2) &&
c->local_consumed > 0) {
+ u_int addition = 0;
+#ifdef HPN_ENABLED
+ u_int32_t tcpwinsz = channel_tcpwinsz(ssh);
+ /* adjust max window size if we are in a dynamic environment */
+ if (c->dynamic_window && (tcpwinsz > c->local_window_max)) {
+ /* grow the window somewhat aggressively to maintain pressure */
+ addition = 1.5 * (tcpwinsz - c->local_window_max);
+ c->local_window_max += addition;
+ debug("Channel: Window growth to %d by %d bytes", c->local_window_max, addition);
+ }
+#endif
if (!c->have_remote_id)
fatal_f("channel %d: no remote id", c->self);
if ((r = sshpkt_start(ssh,
SSH2_MSG_CHANNEL_WINDOW_ADJUST)) != 0 ||
(r = sshpkt_put_u32(ssh, c->remote_id)) != 0 ||
- (r = sshpkt_put_u32(ssh, c->local_consumed)) != 0 ||
+ (r = sshpkt_put_u32(ssh, c->local_consumed + addition)) != 0 ||
(r = sshpkt_send(ssh)) != 0) {
fatal_fr(r, "channel %i", c->self);
}
debug2("channel %d: window %d sent adjust %d", c->self,
- c->local_window, c->local_consumed);
- c->local_window += c->local_consumed;
+ c->local_window, c->local_consumed + addition);
+ c->local_window += c->local_consumed + addition;
c->local_consumed = 0;
}
return 1;
@@ -3709,6 +3753,17 @@ channel_fwd_bind_addr(struct ssh *ssh, const char *lis
return addr;
}
+#ifdef HPN_ENABLED
+void
+channel_set_hpn(int external_hpn_disabled, int external_hpn_buffer_size)
+{
+ hpn_disabled = external_hpn_disabled;
+ hpn_buffer_size = external_hpn_buffer_size;
+ debug("HPN Disabled: %d, HPN Buffer Size: %d", hpn_disabled,
+ hpn_buffer_size);
+}
+#endif
+
static int
channel_setup_fwd_listener_tcpip(struct ssh *ssh, int type,
struct Forward *fwd, int *allocated_listen_port,
@@ -3848,6 +3903,17 @@ channel_setup_fwd_listener_tcpip(struct ssh *ssh, int
}
/* Allocate a channel number for the socket. */
+#ifdef HPN_ENABLED
+ /*
+ * explicitly test for hpn disabled option. if true use smaller
+ * window size.
+ */
+ if (!hpn_disabled)
+ c = channel_new(ssh, "port listener", type, sock, sock,
+ -1, hpn_buffer_size, CHAN_TCP_PACKET_DEFAULT,
+ 0, "port listener", 1);
+ else
+#endif
c = channel_new(ssh, "port-listener", type, sock, sock, -1,
CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_PACKET_DEFAULT,
0, "port listener", 1);
@@ -5016,6 +5082,14 @@ x11_create_display_inet(struct ssh *ssh, int x11_displ
*chanids = xcalloc(num_socks + 1, sizeof(**chanids));
for (n = 0; n < num_socks; n++) {
sock = socks[n];
+#ifdef HPN_ENABLED
+ if (!hpn_disabled)
+ nc = channel_new(ssh, "x11 listener",
+ SSH_CHANNEL_X11_LISTENER, sock, sock, -1,
+ hpn_buffer_size, CHAN_X11_PACKET_DEFAULT,
+ 0, "X11 inet listener", 1);
+ else
+#endif
nc = channel_new(ssh, "x11-listener",
SSH_CHANNEL_X11_LISTENER, sock, sock, -1,
CHAN_X11_WINDOW_DEFAULT, CHAN_X11_PACKET_DEFAULT,
--- work/openssh-7.7p1/channels.h.orig 2018-04-01 22:38:28.000000000 -0700
+++ work/openssh-7.7p1/channels.h 2018-06-27 16:38:40.766588000 -0700
@@ -143,6 +143,9 @@ struct Channel {
u_int local_maxpacket;
int extended_usage;
int single_connection;
+#ifdef HPN_ENABLED
+ int dynamic_window;
+#endif
char *ctype; /* type */
@@ -335,5 +338,10 @@ void chan_ibuf_empty(struct ssh *, Channel *);
void chan_rcvd_ieof(struct ssh *, Channel *);
void chan_write_failed(struct ssh *, Channel *);
void chan_obuf_empty(struct ssh *, Channel *);
+
+#ifdef HPN_ENABLED
+/* hpn handler */
+void channel_set_hpn(int, int);
+#endif
#endif
--- work/openssh-7.7p1/cipher.c.orig 2018-04-01 22:38:28.000000000 -0700
+++ work/openssh-7.7p1/cipher.c 2018-06-27 16:55:43.165788000 -0700
@@ -212,7 +212,12 @@ ciphers_valid(const char *names)
for ((p = strsep(&cp, CIPHER_SEP)); p && *p != '\0';
(p = strsep(&cp, CIPHER_SEP))) {
c = cipher_by_name(p);
+#ifdef NONE_CIPHER_ENABLED
+ if (c == NULL || ((c->flags & CFLAG_INTERNAL) != 0 &&
+ (c->flags & CFLAG_NONE) != 0)) {
+#else
if (c == NULL || (c->flags & CFLAG_INTERNAL) != 0) {
+#endif
free(cipher_list);
return 0;
}
--- work/openssh/clientloop.c.orig 2023-12-18 06:59:50.000000000 -0800
+++ work/openssh/clientloop.c 2024-01-08 16:27:47.806586000 -0800
@@ -1813,6 +1813,15 @@ client_request_x11(struct ssh *ssh, const char *reques
sock = x11_connect_display(ssh);
if (sock < 0)
return NULL;
+#ifdef HPN_ENABLED
+ /* again is this really necessary for X11? */
+ if (!options.hpn_disabled)
+ c = channel_new(ssh, "x11-connection",
+ SSH_CHANNEL_X11_OPEN, sock, sock, -1,
+ options.hpn_buffer_size,
+ CHAN_X11_PACKET_DEFAULT, 0, "x11", 1);
+ else
+#endif
c = channel_new(ssh, "x11-connection",
SSH_CHANNEL_X11_OPEN, sock, sock, -1,
CHAN_TCP_WINDOW_DEFAULT, CHAN_X11_PACKET_DEFAULT, 0, "x11", 1);
@@ -1848,6 +1857,14 @@ client_request_agent(struct ssh *ssh, const char *requ
else
debug2_fr(r, "ssh_agent_bind_hostkey");
+#ifdef HPN_ENABLED
+ if (!options.hpn_disabled)
+ c = channel_new(ssh, "agent-connection",
+ SSH_CHANNEL_OPEN, sock, sock, -1,
+ options.hpn_buffer_size, CHAN_TCP_PACKET_DEFAULT, 0,
+ "authentication agent connection", 1);
+ else
+#endif
c = channel_new(ssh, "agent-connection",
SSH_CHANNEL_OPEN, sock, sock, -1,
CHAN_X11_WINDOW_DEFAULT, CHAN_TCP_PACKET_DEFAULT, 0,
@@ -1876,6 +1893,12 @@ client_request_tun_fwd(struct ssh *ssh, int tun_mode,
}
debug("Tunnel forwarding using interface %s", ifname);
+#ifdef HPN_ENABLED
+ if (!options.hpn_disabled)
+ c = channel_new(ssh, "tun-connection", SSH_CHANNEL_OPENING, fd, fd, -1,
+ options.hpn_buffer_size, CHAN_TCP_PACKET_DEFAULT, 0, "tun", 1);
+ else
+#endif
c = channel_new(ssh, "tun-connection", SSH_CHANNEL_OPENING, fd, fd, -1,
CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_PACKET_DEFAULT, 0, "tun", 1);
c->datagram = 1;
--- work/openssh/compat.c.orig 2021-04-15 20:55:25.000000000 -0700
+++ work/openssh/compat.c 2021-04-28 14:37:33.129317000 -0700
@@ -149,6 +149,14 @@ compat_banner(struct ssh *ssh, const char *version)
debug_f("match: %s pat %s compat 0x%08x",
version, check[i].pat, check[i].bugs);
ssh->compat = check[i].bugs;
+#ifdef HPN_ENABLED
+ /* Check to see if the remote side is OpenSSH and not HPN */
+ if (strstr(version,"OpenSSH") != NULL &&
+ strstr(version,"hpn") == NULL) {
+ ssh->compat |= SSH_BUG_LARGEWINDOW;
+ debug("Remote is NON-HPN aware");
+ }
+#endif
return;
}
}
--- work/openssh/compat.h.orig 2015-05-29 03:27:21.000000000 -0500
+++ work/openssh/compat.h 2015-06-02 09:55:04.208681000 -0500
@@ -62,6 +62,9 @@
#define SSH_BUG_CURVE25519PAD 0x10000000
#define SSH_BUG_HOSTKEYS 0x20000000
#define SSH_BUG_DHGEX_LARGE 0x40000000
+#ifdef HPN_ENABLED
+#define SSH_BUG_LARGEWINDOW 0x80000000
+#endif
void enable_compat13(void);
void enable_compat20(void);
--- work/openssh/configure.ac.orig 2020-03-22 11:06:53.034550000 -0700
+++ work/openssh/configure.ac 2020-03-22 11:07:10.017487000 -0700
@@ -4778,6 +4778,25 @@ AC_ARG_WITH([maildir],
]
) # maildir
+#check whether user wants HPN support
+HPN_MSG="no"
+AC_ARG_WITH(hpn,
+ [ --with-hpn Enable HPN support],
+ [ if test "x$withval" != "xno" ; then
+ AC_DEFINE(HPN_ENABLED,1,[Define if you want HPN support.])
+ HPN_MSG="yes"
+ fi ]
+)
+#check whether user wants NONECIPHER support
+NONECIPHER_MSG="no"
+AC_ARG_WITH(nonecipher,
+ [ --with-nonecipher Enable NONECIPHER support],
+ [ if test "x$withval" != "xno" ; then
+ AC_DEFINE(NONE_CIPHER_ENABLED,1,[Define if you want NONECIPHER support.])
+ NONECIPHER_MSG="yes"
+ fi ]
+)
+
if test ! -z "$cross_compiling" && test "x$cross_compiling" = "xyes"; then
AC_MSG_WARN([cross compiling: Disabling /dev/ptmx test])
disable_ptmx_check=yes
@@ -5459,6 +5478,8 @@ echo " Random number source: $RAND_MSG"
echo " Privsep sandbox style: $SANDBOX_STYLE"
echo " PKCS#11 support: $enable_pkcs11"
echo " U2F/FIDO support: $enable_sk"
+echo " HPN support: $HPN_MSG"
+echo " NONECIPHER support: $NONECIPHER_MSG"
echo ""
--- work/openssh/kex.c.orig 2023-12-18 06:59:50.000000000 -0800
+++ work/openssh/kex.c 2024-01-08 16:24:07.547292000 -0800
@@ -1252,6 +1252,20 @@ kex_choose_conf(struct ssh *ssh, uint32_t seq)
peer[ncomp] = NULL;
goto out;
}
+#ifdef NONE_CIPHER_ENABLED
+ debug("REQUESTED ENC.NAME is '%s'", newkeys->enc.name);
+ if (strcmp(newkeys->enc.name, "none") == 0) {
+ int auth_flag;
+
+ auth_flag = ssh_packet_authentication_state(ssh);
+ debug("Requesting NONE. Authflag is %d", auth_flag);
+ if (auth_flag == 1) {
+ debug("None requested post authentication.");
+ } else {
+ fatal("Pre-authentication none cipher requests are not allowed.");
+ }
+ }
+#endif
debug("kex: %s cipher: %s MAC: %s compression: %s",
ctos ? "client->server" : "server->client",
newkeys->enc.name,
@@ -1462,7 +1476,7 @@ kex_exchange_identification(struct ssh *ssh, int timeo
*/
int
kex_exchange_identification(struct ssh *ssh, int timeout_ms,
- const char *version_addendum)
+ const char *version_addendum, int hpn_disabled)
{
int remote_major, remote_minor, mismatch, oerrno = 0;
size_t len, n;
@@ -1479,8 +1493,13 @@ kex_exchange_identification(struct ssh *ssh, int timeo
sshbuf_reset(our_version);
if (version_addendum != NULL && *version_addendum == '\0')
version_addendum = NULL;
- if ((r = sshbuf_putf(our_version, "SSH-%d.%d-%s%s%s\r\n",
+ if ((r = sshbuf_putf(our_version, "SSH-%d.%d-%s%s%s%s\r\n",
PROTOCOL_MAJOR_2, PROTOCOL_MINOR_2, SSH_VERSION,
+#ifdef HPN_ENABLED
+ hpn_disabled ? "" : SSH_HPN,
+#else
+ "",
+#endif
version_addendum == NULL ? "" : " ",
version_addendum == NULL ? "" : version_addendum)) != 0) {
oerrno = errno;
--- work/openssh-7.7p1/packet.c.orig 2018-04-01 22:38:28.000000000 -0700
+++ work/openssh-7.7p1/packet.c 2018-06-27 16:42:42.739507000 -0700
@@ -926,6 +926,24 @@ ssh_set_newkeys(struct ssh *ssh, int mode)
return 0;
}
+#ifdef NONE_CIPHER_ENABLED
+/* this supports the forced rekeying required for the NONE cipher */
+int rekey_requested = 0;
+void
+packet_request_rekeying(void)
+{
+ rekey_requested = 1;
+}
+
+int
+ssh_packet_authentication_state(struct ssh *ssh)
+{
+ struct session_state *state = ssh->state;
+
+ return(state->after_authentication);
+}
+#endif
+
#define MAX_PACKETS (1U<<31)
static int
ssh_packet_need_rekeying(struct ssh *ssh, u_int outbound_packet_len)
@@ -944,6 +962,14 @@ ssh_packet_need_rekeying(struct ssh *ssh, u_int outbou
/* Peer can't rekey */
if (ssh->compat & SSH_BUG_NOREKEY)
return 0;
+#ifdef NONE_CIPHER_ENABLED
+ /* used to force rekeying when called for by the none
+ * cipher switch methods -cjr */
+ if (rekey_requested == 1) {
+ rekey_requested = 0;
+ return 1;
+ }
+#endif
/*
* Permit one packet in or out per rekey - this allows us to
--- work.clean/openssh-6.8p1/packet.h 2015-03-17 00:49:20.000000000 -0500
+++ work/openssh-6.8p1/packet.h 2015-04-03 16:10:34.728161000 -0500
@@ -206,6 +206,11 @@ int sshpkt_get_end(struct ssh *ssh);
void sshpkt_fmt_connection_id(struct ssh *ssh, char *s, size_t l);
const u_char *sshpkt_ptr(struct ssh *, size_t *lenp);
+#ifdef NONE_CIPHER_ENABLED
+void packet_request_rekeying(void);
+int ssh_packet_authentication_state(struct ssh *ssh);
+#endif
+
#if !defined(WITH_OPENSSL)
# undef BIGNUM
# undef EC_KEY
--- work/openssh/readconf.c.orig 2025-04-09 00:02:43.000000000 -0700
+++ work/openssh/readconf.c 2025-04-10 22:29:45.138038000 -0700
@@ -71,6 +71,9 @@
#include "myproposal.h"
#include "digest.h"
#include "version.h"
+#ifdef HPN_ENABLED
+#include "sshbuf.h"
+#endif
/* Format of the configuration file:
@@ -172,6 +175,12 @@ typedef enum {
oLocalCommand, oPermitLocalCommand, oRemoteCommand,
oVisualHostKey,
oKexAlgorithms, oIPQoS, oRequestTTY, oSessionType, oStdinNull,
+#ifdef HPN_ENABLED
+ oHPNDisabled, oHPNBufferSize, oTcpRcvBufPoll, oTcpRcvBuf,
+#endif
+#ifdef NONE_CIPHER_ENABLED
+ oNoneSwitch, oNoneEnabled,
+#endif
oForkAfterAuthentication, oIgnoreUnknown, oProxyUseFdpass,
oCanonicalDomains, oCanonicalizeHostname, oCanonicalizeMaxDots,
oCanonicalizeFallbackLocal, oCanonicalizePermittedCNAMEs,
@@ -323,6 +332,16 @@ static struct {
{ "hostbasedkeytypes", oHostbasedAcceptedAlgorithms }, /* obsolete */
{ "pubkeyacceptedalgorithms", oPubkeyAcceptedAlgorithms },
{ "pubkeyacceptedkeytypes", oPubkeyAcceptedAlgorithms }, /* obsolete */
+#ifdef NONE_CIPHER_ENABLED
+ { "noneenabled", oNoneEnabled },
+ { "noneswitch", oNoneSwitch },
+#endif
+#ifdef HPN_ENABLED
+ { "tcprcvbufpoll", oTcpRcvBufPoll },
+ { "tcprcvbuf", oTcpRcvBuf },
+ { "hpndisabled", oHPNDisabled },
+ { "hpnbuffersize", oHPNBufferSize },
+#endif
{ "ignoreunknown", oIgnoreUnknown },
{ "proxyjump", oProxyJump },
{ "securitykeyprovider", oSecurityKeyProvider },
@@ -1332,6 +1351,44 @@ parse_time:
intptr = &options->check_host_ip;
goto parse_flag;
+#ifdef HPN_ENABLED
+ case oHPNDisabled:
+ intptr = &options->hpn_disabled;
+ goto parse_flag;
+
+ case oHPNBufferSize:
+ intptr = &options->hpn_buffer_size;
+ goto parse_int;
+
+ case oTcpRcvBufPoll:
+ intptr = &options->tcp_rcv_buf_poll;
+ goto parse_flag;
+
+ case oTcpRcvBuf:
+ intptr = &options->tcp_rcv_buf;
+ goto parse_int;
+#endif
+
+#ifdef NONE_CIPHER_ENABLED
+ case oNoneEnabled:
+ intptr = &options->none_enabled;
+ goto parse_flag;
+
+ /* we check to see if the command comes from the */
+ /* command line or not. If it does then enable it */
+ /* otherwise fail. NONE should never be a default configuration */
+ case oNoneSwitch:
+ if(strcmp(filename,"command-line") == 0) {
+ intptr = &options->none_switch;
+ goto parse_flag;
+ } else {
+ error("NoneSwitch is found in %.200s.\nYou may only use this configuration option from the command line", filename);
+ error("Continuing...");
+ debug("NoneSwitch directive found in %.200s.", filename);
+ return 0;
+ }
+#endif
+
case oVerifyHostKeyDNS:
intptr = &options->verify_host_key_dns;
multistate_ptr = multistate_yesnoask;
@@ -2742,6 +2799,16 @@ initialize_options(Options * options)
options->ip_qos_interactive = -1;
options->ip_qos_bulk = -1;
options->request_tty = -1;
+#ifdef NONE_CIPHER_ENABLED
+ options->none_switch = -1;
+ options->none_enabled = -1;
+#endif
+#ifdef HPN_ENABLED
+ options->hpn_disabled = -1;
+ options->hpn_buffer_size = -1;
+ options->tcp_rcv_buf_poll = -1;
+ options->tcp_rcv_buf = -1;
+#endif
options->session_type = -1;
options->stdin_null = -1;
options->fork_after_authentication = -1;
@@ -2916,6 +2983,34 @@ fill_default_options(Options * options)
options->server_alive_interval = 0;
if (options->server_alive_count_max == -1)
options->server_alive_count_max = 3;
+#ifdef NONE_CIPHER_ENABLED
+ if (options->none_switch == -1)
+ options->none_switch = 0;
+ if (options->none_enabled == -1)
+ options->none_enabled = 0;
+#endif
+#ifdef HPN_ENABLED
+ if (options->hpn_disabled == -1)
+ options->hpn_disabled = 0;
+ if (options->hpn_buffer_size > -1) {
+ /* if a user tries to set the size to 0 set it to 1KB */
+ if (options->hpn_buffer_size == 0)
+ options->hpn_buffer_size = 1;
+ /* limit the buffer to SSHBUF_SIZE_MAX (currently 256MB) */
+ if (options->hpn_buffer_size > (SSHBUF_SIZE_MAX / 1024)) {
+ options->hpn_buffer_size = SSHBUF_SIZE_MAX;
+ debug("User requested buffer larger than 256MB. Request reverted to 256MB");
+ } else
+ options->hpn_buffer_size *= 1024;
+ debug("hpn_buffer_size set to %d", options->hpn_buffer_size);
+ }
+ if (options->tcp_rcv_buf == 0)
+ options->tcp_rcv_buf = 1;
+ if (options->tcp_rcv_buf > -1)
+ options->tcp_rcv_buf *=1024;
+ if (options->tcp_rcv_buf_poll == -1)
+ options->tcp_rcv_buf_poll = 1;
+#endif
if (options->control_master == -1)
options->control_master = 0;
if (options->control_persist == -1) {
--- work.clean/openssh-6.8p1/readconf.h 2015-03-17 00:49:20.000000000 -0500
+++ work/openssh-6.8p1/readconf.h 2015-04-03 13:47:45.670125000 -0500
@@ -105,6 +105,16 @@
int clear_forwardings;
int enable_ssh_keysign;
+#ifdef NONE_CIPHER_ENABLED
+ int none_switch; /* Use none cipher */
+ int none_enabled; /* Allow none to be used */
+#endif
+#ifdef HPN_ENABLED
+ int tcp_rcv_buf; /* user switch to set tcp recv buffer */
+ int tcp_rcv_buf_poll; /* Option to poll recv buf every window transfer */
+ int hpn_disabled; /* Switch to disable HPN buffer management */
+ int hpn_buffer_size; /* User definable size for HPN buffer window */
+#endif
int64_t rekey_limit;
int rekey_interval;
int no_host_authentication_for_localhost;
--- work/openssh/scp.c.orig 2020-09-27 00:25:01.000000000 -0700
+++ work/openssh/scp.c 2020-11-10 10:31:03.060729000 -0800
@@ -1246,7 +1246,7 @@ sink(int argc, char **argv, const char *src)
off_t size, statbytes;
unsigned long long ull;
int setimes, targisdir, wrerr;
- char ch, *cp, *np, *targ, *why, *vect[1], buf[2048], visbuf[2048];
+ char ch, *cp, *np, *targ, *why, *vect[1], buf[COPY_BUFLEN], visbuf[COPY_BUFLEN];
char **patterns = NULL;
size_t n, npatterns = 0;
struct timeval tv[2];
--- work/openssh/servconf.c.orig 2025-04-09 00:02:43.000000000 -0700
+++ work/openssh/servconf.c 2025-04-10 22:30:44.919047000 -0700
@@ -69,6 +69,9 @@
#include "myproposal.h"
#include "digest.h"
#include "version.h"
+#ifdef HPN_ENABLED
+#include "sshbuf.h"
+#endif
#if !defined(SSHD_PAM_SERVICE)
# define SSHD_PAM_SERVICE "sshd"
@@ -204,6 +207,14 @@ initialize_server_options(ServerOptions *options)
options->authorized_principals_file = NULL;
options->authorized_principals_command = NULL;
options->authorized_principals_command_user = NULL;
+#ifdef NONE_CIPHER_ENABLED
+ options->none_enabled = -1;
+#endif
+#ifdef HPN_ENABLED
+ options->tcp_rcv_buf_poll = -1;
+ options->hpn_disabled = -1;
+ options->hpn_buffer_size = -1;
+#endif
options->ip_qos_interactive = -1;
options->ip_qos_bulk = -1;
options->version_addendum = NULL;
@@ -471,6 +482,57 @@ fill_default_server_options(ServerOptions *options)
}
if (options->permit_tun == -1)
options->permit_tun = SSH_TUNMODE_NO;
+#ifdef NONE_CIPHER_ENABLED
+ if (options->none_enabled == -1)
+ options->none_enabled = 0;
+#endif
+#ifdef HPN_ENABLED
+ if (options->hpn_disabled == -1)
+ options->hpn_disabled = 0;
+
+ if (options->hpn_buffer_size == -1) {
+ /*
+ * option not explicitly set. Now we have to figure out
+ * what value to use.
+ */
+ if (options->hpn_disabled == 1) {
+ options->hpn_buffer_size = CHAN_SES_WINDOW_DEFAULT;
+ } else {
+ int sock, socksize;
+ socklen_t socksizelen = sizeof(socksize);
+
+ /*
+ * get the current RCV size and set it to that
+ * create a socket but don't connect it
+ * we use that the get the rcv socket size
+ */
+ sock = socket(AF_INET, SOCK_STREAM, 0);
+ getsockopt(sock, SOL_SOCKET, SO_RCVBUF,
+ &socksize, &socksizelen);
+ close(sock);
+ options->hpn_buffer_size = socksize;
+ debug ("HPN Buffer Size: %d", options->hpn_buffer_size);
+ }
+ } else {
+ /*
+ * we have to do this incase the user sets both values in a
+ * contradictory manner. hpn_disabled overrrides
+ * hpn_buffer_size
+ */
+ if (options->hpn_disabled <= 0) {
+ if (options->hpn_buffer_size == 0)
+ options->hpn_buffer_size = 1;
+ /* limit the maximum buffer to SSHBUF_SIZE_MAX (currently 256MB) */
+ if (options->hpn_buffer_size > (SSHBUF_SIZE_MAX / 1024)) {
+ options->hpn_buffer_size = SSHBUF_SIZE_MAX;
+ } else {
+ options->hpn_buffer_size *= 1024;
+ }
+ } else
+ options->hpn_buffer_size = CHAN_TCP_WINDOW_DEFAULT;
+ }
+#endif
+
if (options->ip_qos_interactive == -1)
options->ip_qos_interactive = IPTOS_DSCP_AF21;
if (options->ip_qos_bulk == -1)
@@ -573,6 +635,12 @@ typedef enum {
sUsePrivilegeSeparation, sAllowAgentForwarding,
sHostCertificate, sInclude,
sRevokedKeys, sTrustedUserCAKeys, sAuthorizedPrincipalsFile,
+#ifdef NONE_CIPHER_ENABLED
+ sNoneEnabled,
+#endif
+#ifdef HPN_ENABLED
+ sTcpRcvBufPoll, sHPNDisabled, sHPNBufferSize,
+#endif
sAuthorizedPrincipalsCommand, sAuthorizedPrincipalsCommandUser,
sKexAlgorithms, sCASignatureAlgorithms, sIPQoS, sVersionAddendum,
sAuthorizedKeysCommand, sAuthorizedKeysCommandUser,
@@ -727,6 +795,14 @@ static struct {
{ "revokedkeys", sRevokedKeys, SSHCFG_ALL },
{ "trustedusercakeys", sTrustedUserCAKeys, SSHCFG_ALL },
{ "authorizedprincipalsfile", sAuthorizedPrincipalsFile, SSHCFG_ALL },
+#ifdef NONE_CIPHER_ENABLED
+ { "noneenabled", sNoneEnabled, SSHCFG_ALL },
+#endif
+#ifdef HPN_ENABLED
+ { "hpndisabled", sHPNDisabled, SSHCFG_ALL },
+ { "hpnbuffersize", sHPNBufferSize, SSHCFG_ALL },
+ { "tcprcvbufpoll", sTcpRcvBufPoll, SSHCFG_ALL },
+#endif
{ "kexalgorithms", sKexAlgorithms, SSHCFG_GLOBAL },
{ "include", sInclude, SSHCFG_ALL },
{ "ipqos", sIPQoS, SSHCFG_ALL },
@@ -1568,6 +1644,25 @@ process_server_config_line_depth(ServerOptions *option
intptr = &options->hostbased_authentication;
goto parse_flag;
+#ifdef NONE_CIPHER_ENABLED
+ case sNoneEnabled:
+ intptr = &options->none_enabled;
+ goto parse_flag;
+#endif
+#ifdef HPN_ENABLED
+ case sTcpRcvBufPoll:
+ intptr = &options->tcp_rcv_buf_poll;
+ goto parse_flag;
+
+ case sHPNDisabled:
+ intptr = &options->hpn_disabled;
+ goto parse_flag;
+
+ case sHPNBufferSize:
+ intptr = &options->hpn_buffer_size;
+ goto parse_int;
+#endif
+
case sHostbasedUsesNameFromPacketOnly:
intptr = &options->hostbased_uses_name_from_packet_only;
goto parse_flag;
--- work.clean/openssh-6.8p1/servconf.h 2015-03-17 00:49:20.000000000 -0500
+++ work/openssh-6.8p1/servconf.h 2015-04-03 13:48:37.316827000 -0500
@@ -169,6 +169,15 @@
int use_pam; /* Enable auth via PAM */
+#ifdef NONE_CIPHER_ENABLED
+ int none_enabled; /* enable NONE cipher switch */
+#endif
+#ifdef HPN_ENABLED
+ int tcp_rcv_buf_poll; /* poll tcp rcv window in autotuning kernels*/
+ int hpn_disabled; /* disable hpn functionality. false by default */
+ int hpn_buffer_size; /* set the hpn buffer size - default 3MB */
+#endif
+
int permit_tun;
int num_permitted_opens;
--- work/openssh-7.7p1/serverloop.c.orig 2018-04-01 22:38:28.000000000 -0700
+++ work/openssh-7.7p1/serverloop.c 2018-06-27 16:53:02.246871000 -0700
@@ -550,6 +550,12 @@ server_request_tun(struct ssh *ssh)
goto done;
debug("Tunnel forwarding using interface %s", ifname);
+#ifdef HPN_ENABLED
+ if (!options.hpn_disabled)
+ c = channel_new(ssh, "tun", SSH_CHANNEL_OPEN, sock, sock, -1,
+ options.hpn_buffer_size, CHAN_TCP_PACKET_DEFAULT, 0, "tun", 1);
+ else
+#endif
c = channel_new(ssh, "tun", SSH_CHANNEL_OPEN, sock, sock, -1,
CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_PACKET_DEFAULT, 0, "tun", 1);
c->datagram = 1;
@@ -600,6 +606,10 @@ server_request_session(struct ssh *ssh)
c = channel_new(ssh, "session", SSH_CHANNEL_LARVAL,
-1, -1, -1, /*window size*/0, CHAN_SES_PACKET_DEFAULT,
0, "server-session", 1);
+#ifdef HPN_ENABLED
+ if (options.tcp_rcv_buf_poll && !options.hpn_disabled)
+ c->dynamic_window = 1;
+#endif
if (session_open(the_authctxt, c->self) != 1) {
debug("session open failed, free channel %d", c->self);
channel_free(ssh, c);
--- work/openssh-7.7p1/session.c.orig 2018-04-01 22:38:28.000000000 -0700
+++ work/openssh-7.7p1/session.c 2018-06-27 17:01:40.730347000 -0700
@@ -2116,6 +2116,14 @@ session_set_fds(struct ssh *ssh, Session *s,
*/
if (s->chanid == -1)
fatal("no channel for session %d", s->self);
+#ifdef HPN_ENABLED
+ if (!options.hpn_disabled)
+ channel_set_fds(ssh, s->chanid,
+ fdout, fdin, fderr,
+ ignore_fderr ? CHAN_EXTENDED_IGNORE : CHAN_EXTENDED_READ,
+ 1, is_tty, options.hpn_buffer_size);
+ else
+#endif
channel_set_fds(ssh, s->chanid,
fdout, fdin, fderr,
ignore_fderr ? CHAN_EXTENDED_IGNORE : CHAN_EXTENDED_READ,
--- work.clean/openssh-6.8p1/sftp.1 2015-03-17 00:49:20.000000000 -0500
+++ work/openssh-6.8p1/sftp.1 2015-04-01 22:16:49.921688000 -0500
@@ -263,7 +263,8 @@
Specify how many requests may be outstanding at any one time.
Increasing this may slightly improve file transfer speed
but will increase memory usage.
-The default is 64 outstanding requests.
+The default is 256 outstanding requests providing for 8MB
+of outstanding data with a 32KB buffer.
.It Fl r
Recursively copy entire directories when uploading and downloading.
Note that
--- work/openssh/ssh.c.orig 2024-06-30 21:36:28.000000000 -0700
+++ work/openssh/ssh.c 2024-07-01 13:58:31.555859000 -0700
@@ -1070,6 +1070,14 @@ main(int ac, char **av)
break;
case 'T':
options.request_tty = REQUEST_TTY_NO;
+#ifdef NONE_CIPHER_ENABLED
+ /*
+ * ensure that the user doesn't try to backdoor a
+ * null cipher switch on an interactive session
+ * so explicitly disable it no matter what.
+ */
+ options.none_switch = 0;
+#endif
break;
case 'o':
line = xstrdup(optarg);
@@ -2159,6 +2167,78 @@ ssh_session2_setup(struct ssh *ssh, int id, int succes
NULL, fileno(stdin), command, environ);
}
+static void
+hpn_options_init(struct ssh *ssh)
+{
+ /*
+ * We need to check to see if what they want to do about buffer
+ * sizes here. In a hpn to nonhpn connection we want to limit
+ * the window size to something reasonable in case the far side
+ * has the large window bug. In hpn to hpn connection we want to
+ * use the max window size but allow the user to override it
+ * lastly if they disabled hpn then use the ssh std window size.
+ *
+ * So why don't we just do a getsockopt() here and set the
+ * ssh window to that? In the case of a autotuning receive
+ * window the window would get stuck at the initial buffer
+ * size generally less than 96k. Therefore we need to set the
+ * maximum ssh window size to the maximum hpn buffer size
+ * unless the user has specifically set the tcprcvbufpoll
+ * to no. In which case we *can* just set the window to the
+ * minimum of the hpn buffer size and tcp receive buffer size.
+ */
+
+ if (tty_flag)
+ options.hpn_buffer_size = CHAN_SES_WINDOW_DEFAULT;
+ else
+ options.hpn_buffer_size = 2 * 1024 * 1024;
+
+ if (ssh->compat & SSH_BUG_LARGEWINDOW) {
+ debug("HPN to Non-HPN Connection");
+ } else {
+ int sock, socksize;
+ socklen_t socksizelen;
+ if (options.tcp_rcv_buf_poll <= 0) {
+ sock = socket(AF_INET, SOCK_STREAM, 0);
+ socksizelen = sizeof(socksize);
+ getsockopt(sock, SOL_SOCKET, SO_RCVBUF,
+ &socksize, &socksizelen);
+ close(sock);
+ debug("socksize %d", socksize);
+ options.hpn_buffer_size = socksize;
+ debug("HPNBufferSize set to TCP RWIN: %d", options.hpn_buffer_size);
+ } else {
+ if (options.tcp_rcv_buf > 0) {
+ /*
+ * Create a socket but don't connect it:
+ * we use that the get the rcv socket size
+ */
+ sock = socket(AF_INET, SOCK_STREAM, 0);
+ /*
+ * If they are using the tcp_rcv_buf option,
+ * attempt to set the buffer size to that.
+ */
+ if (options.tcp_rcv_buf) {
+ socksizelen = sizeof(options.tcp_rcv_buf);
+ setsockopt(sock, SOL_SOCKET, SO_RCVBUF,
+ &options.tcp_rcv_buf, socksizelen);
+ }
+ socksizelen = sizeof(socksize);
+ getsockopt(sock, SOL_SOCKET, SO_RCVBUF,
+ &socksize, &socksizelen);
+ close(sock);
+ debug("socksize %d", socksize);
+ options.hpn_buffer_size = socksize;
+ debug("HPNBufferSize set to user TCPRcvBuf: %d", options.hpn_buffer_size);
+ }
+ }
+ }
+
+ debug("Final hpn_buffer_size = %d", options.hpn_buffer_size);
+
+ channel_set_hpn(options.hpn_disabled, options.hpn_buffer_size);
+}
+
/* open new channel for a session */
static int
ssh_session2_open(struct ssh *ssh)
@@ -2177,9 +2257,17 @@ ssh_session2_open(struct ssh *ssh)
if (in == -1 || out == -1 || err == -1)
fatal("dup() in/out/err failed");
+#ifdef HPN_ENABLED
+ window = options.hpn_buffer_size;
+#else
window = CHAN_SES_WINDOW_DEFAULT;
+#endif
+
packetmax = CHAN_SES_PACKET_DEFAULT;
if (tty_flag) {
+#ifdef HPN_ENABLED
+ window = CHAN_SES_WINDOW_DEFAULT;
+#endif
window >>= 1;
packetmax >>= 1;
}
@@ -2188,6 +2276,12 @@ ssh_session2_open(struct ssh *ssh)
window, packetmax, CHAN_EXTENDED_WRITE,
"client-session", CHANNEL_NONBLOCK_STDIO);
+#ifdef HPN_ENABLED
+ if (options.tcp_rcv_buf_poll > 0 && !options.hpn_disabled) {
+ c->dynamic_window = 1;
+ debug ("Enabled Dynamic Window Scaling");
+ }
+#endif
debug3_f("channel_new: %d", c->self);
channel_send_open(ssh, c->self);
@@ -2203,6 +2297,15 @@ ssh_session2(struct ssh *ssh, const struct ssh_conn_in
{
int r, interactive, id = -1;
char *cp, *tun_fwd_ifname = NULL;
+
+#ifdef HPN_ENABLED
+ /*
+ * We need to initialize this early because the forwarding logic below
+ * might open channels that use the hpn buffer sizes. We can't send a
+ * window of -1 (the default) to the server as it breaks things.
+ */
+ hpn_options_init(ssh);
+#endif
/* XXX should be pre-session */
if (!options.control_persist)
--- work/openssh-7.7p1/sshbuf.h.orig 2018-06-27 16:11:24.503058000 -0700
+++ work/openssh-7.7p1/sshbuf.h 2018-06-27 16:12:01.359375000 -0700
@@ -28,7 +28,11 @@
# endif /* OPENSSL_HAS_ECC */
#endif /* WITH_OPENSSL */
+#ifdef HPN_ENABLED
+#define SSHBUF_SIZE_MAX 0xF000000 /* Hard maximum size 256MB */
+#else
#define SSHBUF_SIZE_MAX 0x8000000 /* Hard maximum size */
+#endif
#define SSHBUF_REFS_MAX 0x100000 /* Max child buffers */
#define SSHBUF_MAX_BIGNUM (16384 / 8) /* Max bignum *bytes* */
#define SSHBUF_MAX_ECPOINT ((528 * 2 / 8) + 1) /* Max EC point *bytes* */
--- work/openssh/sshconnect.c.orig 2025-04-09 00:02:43.000000000 -0700
+++ work/openssh/sshconnect.c 2025-04-10 22:32:59.573577000 -0700
@@ -341,6 +341,31 @@ check_ifaddrs(const char *ifname, int af, const struct
}
}
return -1;
+}
+#endif
+
+#ifdef HPN_ENABLED
+/*
+ * Set TCP receive buffer if requested.
+ * Note: tuning needs to happen after the socket is
+ * created but before the connection happens
+ * so winscale is negotiated properly -cjr
+ */
+static void
+ssh_set_socket_recvbuf(int sock)
+{
+ void *buf = (void *)&options.tcp_rcv_buf;
+ int sz = sizeof(options.tcp_rcv_buf);
+ int socksize;
+ socklen_t socksizelen = sizeof(socksize);
+
+ debug("setsockopt Attempting to set SO_RCVBUF to %d", options.tcp_rcv_buf);
+ if (setsockopt(sock, SOL_SOCKET, SO_RCVBUF, buf, sz) >= 0) {
+ getsockopt(sock, SOL_SOCKET, SO_RCVBUF, &socksize, &socksizelen);
+ debug("setsockopt SO_RCVBUF: %.100s %d", strerror(errno), socksize);
+ } else
+ error("Couldn't set socket receive buffer to %d: %.100s",
+ options.tcp_rcv_buf, strerror(errno));
}
#endif
@@ -370,6 +395,11 @@ ssh_create_socket(struct addrinfo *ai)
if (options.ip_qos_interactive != INT_MAX)
set_sock_tos(sock, options.ip_qos_interactive);
+#ifdef HPN_ENABLED
+ if (options.tcp_rcv_buf > 0)
+ ssh_set_socket_recvbuf(sock);
+#endif
+
/* Bind the socket to an alternative local IP address */
if (options.bind_address == NULL && options.bind_interface == NULL)
return sock;
@@ -1605,7 +1635,7 @@ ssh_login(struct ssh *ssh, Sensitive *sensitive, const
/* Exchange protocol version identification strings with the server. */
if ((r = kex_exchange_identification(ssh, timeout_ms,
- options.version_addendum)) != 0)
+ options.version_addendum, options.hpn_disabled)) != 0)
sshpkt_fatal(ssh, r, "banner exchange");
/* Put the connection into non-blocking mode. */
--- work/openssh/sshconnect2.c.orig 2023-03-15 14:28:19.000000000 -0700
+++ work/openssh/sshconnect2.c 2023-05-19 14:20:01.965073000 -0700
@@ -83,7 +83,13 @@ extern Options options;
extern char *client_version_string;
extern char *server_version_string;
extern Options options;
+#ifdef NONE_CIPHER_ENABLED
+/* tty_flag is set in ssh.c. use this in ssh_userauth2 */
+/* if it is set then prevent the switch to the null cipher */
+extern int tty_flag;
+#endif
+
/*
* SSH2 key exchange
*/
@@ -482,6 +488,34 @@ ssh_userauth2(struct ssh *ssh, const char *local_user,
if (!authctxt.success)
fatal("Authentication failed.");
+#ifdef NONE_CIPHER_ENABLED
+ /*
+ * if the user wants to use the none cipher do it
+ * post authentication and only if the right conditions are met
+ * both of the NONE commands must be true and there must be no
+ * tty allocated.
+ */
+ if ((options.none_switch == 1) && (options.none_enabled == 1)) {
+ char *myproposal[PROPOSAL_MAX];
+ char *s = NULL;
+ const char *none_cipher = "none";
+
+ if (!tty_flag) { /* no null on tty sessions */
+ debug("Requesting none rekeying...");
+ kex_proposal_populate_entries(ssh, myproposal, s, none_cipher,
+ options.macs,
+ compression_alg_list(options.compression),
+ options.hostkeyalgorithms);
+ kex_prop2buf(ssh->kex->my, myproposal);
+ packet_request_rekeying();
+ fprintf(stderr, "WARNING: ENABLED NONE CIPHER\n");
+ } else {
+ /* requested NONE cipher when in a tty */
+ debug("Cannot switch to NONE cipher with tty allocated");
+ fprintf(stderr, "NONE cipher switch disabled when a TTY is allocated\n");
+ }
+ }
+#endif
if (ssh_packet_connection_is_on_socket(ssh)) {
verbose("Authenticated to %s ([%s]:%d) using \"%s\".", host,
ssh_remote_ipaddr(ssh), ssh_remote_port(ssh),
--- work/openssh/sshd.c.orig 2024-06-30 21:36:28.000000000 -0700
+++ work/openssh/sshd.c 2024-07-01 14:03:40.471948000 -0700
@@ -75,6 +75,9 @@
#include "log.h"
#include "sshbuf.h"
#include "misc.h"
+#ifdef HPN_ENABLED
+#include "channels.h"
+#endif
#include "servconf.h"
#include "compat.h"
#include "digest.h"
@@ -742,6 +742,10 @@ listen_on_addrs(struct listenaddr *la)
int ret, listen_sock;
struct addrinfo *ai;
char ntop[NI_MAXHOST], strport[NI_MAXSERV];
+#ifdef HPN_ENABLED
+ int socksize;
+ socklen_t socksizelen = sizeof(socksize);
+#endif
for (ai = la->addrs; ai; ai = ai->ai_next) {
if (ai->ai_family != AF_INET && ai->ai_family != AF_INET6)
@@ -786,6 +790,13 @@ listen_on_addrs(struct listenaddr *la)
sock_set_v6only(listen_sock);
debug("Bind to port %s on %s.", strport, ntop);
+
+#ifdef HPN_ENABLED
+ getsockopt(listen_sock, SOL_SOCKET, SO_RCVBUF,
+ &socksize, &socksizelen);
+ debug("Server TCP RWIN socket size: %d", socksize);
+ debug("HPN Buffer Size: %d", options.hpn_buffer_size);
+#endif
/* Bind the socket to the desired port. */
if (bind(listen_sock, ai->ai_addr, ai->ai_addrlen) == -1) {
@@ -1409,6 +1420,15 @@ main(int ac, char **av)
/* Fill in default values for those options not explicitly set. */
fill_default_server_options(&options);
+#ifdef NONE_CIPHER_ENABLED
+ if (options.none_enabled == 1) {
+ char *old_ciphers = options.ciphers;
+
+ xasprintf(&options.ciphers, "%s,none", old_ciphers);
+ free(old_ciphers);
+ }
+#endif
+
/* Check that options are sensible */
if (options.authorized_keys_command_user == NULL &&
(options.authorized_keys_command != NULL &&
@@ -1742,6 +1762,11 @@ main(int ac, char **av)
/* This is the child processing a new connection. */
setproctitle("%s", "[accepted]");
+#ifdef HPN_ENABLED
+ /* set the HPN options for the child */
+ channel_set_hpn(options.hpn_disabled, options.hpn_buffer_size);
+#endif
+
/*
* Create a new session and process group since the 4.4BSD
* setlogin() affects the entire process group. We don't
--- work.clean/openssh-9.8p1/sshd-session.c.orig 2024-07-01 13:54:25.745441000 -0700
+++ work/openssh-9.8p1/sshd-session.c 2024-07-01 13:54:57.335695000 -0700
@@ -1305,7 +1305,7 @@ main(int ac, char **av)
alarm(options.login_grace_time);
if ((r = kex_exchange_identification(ssh, -1,
- options.version_addendum)) != 0)
+ options.version_addendum, options.hpn_disabled)) != 0)
sshpkt_fatal(ssh, r, "banner exchange");
ssh_packet_set_nonblocking(ssh);
--- work.clean/openssh-6.8p1/sshd_config 2015-04-01 22:07:18.248858000 -0500
+++ work/openssh-6.8p1/sshd_config 2015-04-01 22:16:49.932279000 -0500
@@ -111,6 +111,20 @@ AuthorizedKeysFile .ssh/authorized_keys
# override default of no subsystems
Subsystem sftp /usr/libexec/sftp-server
+# the following are HPN related configuration options
+# tcp receive buffer polling. disable in non autotuning kernels
+#TcpRcvBufPoll yes
+
+# disable hpn performance boosts
+#HPNDisabled no
+
+# buffer size for hpn to non-hpn connections
+#HPNBufferSize 2048
+
+
+# allow the use of the none cipher
+#NoneEnabled no
+
# Example of overriding settings on a per-user basis
#Match User anoncvs
# X11Forwarding no
--- work/openssh/version.h.orig 2025-02-18 00:15:08.000000000 -0800
+++ work/openssh/version.h 2025-02-19 07:59:36.425254000 -0800
@@ -4,3 +4,4 @@
#define SSH_PORTABLE "p2"
#define SSH_RELEASE SSH_VERSION SSH_PORTABLE
+#define SSH_HPN "-hpn14v15"
--- work/openssh/kex.h.orig 2019-07-10 17:35:36.523216000 -0700
+++ work/openssh/kex.h 2019-07-10 17:35:41.997522000 -0700
@@ -178,7 +178,7 @@ char *kex_alg_list(char);
char *kex_names_cat(const char *, const char *);
int kex_assemble_names(char **, const char *, const char *);
-int kex_exchange_identification(struct ssh *, int, const char *);
+int kex_exchange_identification(struct ssh *, int, const char *, int);
struct kex *kex_new(void);
int kex_ready(struct ssh *, char *[PROPOSAL_MAX]);
--- work/openssh/sshd-auth.c.orig 2025-04-10 22:36:29.699636000 -0700
+++ work/openssh/sshd-auth.c 2025-04-10 22:36:33.770235000 -0700
@@ -827,6 +827,10 @@ do_ssh2_kex(struct ssh *ssh)
struct kex *kex;
int r;
+#ifdef NONE_CIPHER_ENABLED
+ if (options.none_enabled == 1)
+ debug ("WARNING: None cipher enabled");
+#endif
if (options.rekey_limit || options.rekey_interval)
ssh_packet_set_rekey_limits(ssh, options.rekey_limit,
options.rekey_interval);
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