1 files changed, 111 insertions, 0 deletions

diff --git a/debian/patches/debian-banner.patch b/debian/patches/debian-banner.patch
new file mode 100644
index 000000000..eceac3ccf
--- /dev/null
+++ b/debian/patches/debian-banner.patch
@@ -0,0 +1,111 @@
+From 1cbbbb90ae1a4f88f8090e1fdecee007b8d360f8 Mon Sep 17 00:00:00 2001
+From: Kees Cook <kees@debian.org>
+Date: Sun, 9 Feb 2014 16:10:06 +0000
+Subject: Add DebianBanner server configuration option
+
+Setting this to "no" causes sshd to omit the Debian revision from its
+initial protocol handshake, for those scared by package-versioning.patch.
+
+Bug-Debian: http://bugs.debian.org/562048
+Forwarded: not-needed
+Last-Update: 2015-11-29
+
+Patch-Name: debian-banner.patch
+---
+ servconf.c    | 9 +++++++++
+ servconf.h    | 2 ++
+ sshd.c        | 3 ++-
+ sshd_config.5 | 5 +++++
+ 4 files changed, 18 insertions(+), 1 deletion(-)
+
+diff --git a/servconf.c b/servconf.c
+index ed3a88d..a778f44 100644
+--- a/servconf.c
++++ b/servconf.c
+@@ -171,6 +171,7 @@ initialize_server_options(ServerOptions *options)
+        options->ip_qos_bulk = -1;
+        options->version_addendum = NULL;
+        options->fingerprint_hash = -1;
++       options->debian_banner = -1;
+ }
+ 
+ /* Returns 1 if a string option is unset or set to "none" or 0 otherwise. */
+@@ -347,6 +348,8 @@ fill_default_server_options(ServerOptions *options)
+                options->fwd_opts.streamlocal_bind_unlink = 0;
+        if (options->fingerprint_hash == -1)
+                options->fingerprint_hash = SSH_FP_HASH_DEFAULT;
++       if (options->debian_banner == -1)
++               options->debian_banner = 1;
+ 
+        if (kex_assemble_names(KEX_SERVER_ENCRYPT, &options->ciphers) != 0 ||
+            kex_assemble_names(KEX_SERVER_MAC, &options->macs) != 0 ||
+@@ -430,6 +433,7 @@ typedef enum {
+        sAuthenticationMethods, sHostKeyAgent, sPermitUserRC,
+        sStreamLocalBindMask, sStreamLocalBindUnlink,
+        sAllowStreamLocalForwarding, sFingerprintHash,
++       sDebianBanner,
+        sDeprecated, sUnsupported
+ } ServerOpCodes;
+ 
+@@ -577,6 +581,7 @@ static struct {
+        { "streamlocalbindunlink", sStreamLocalBindUnlink, SSHCFG_ALL },
+        { "allowstreamlocalforwarding", sAllowStreamLocalForwarding, SSHCFG_ALL },
+        { "fingerprinthash", sFingerprintHash, SSHCFG_GLOBAL },
++       { "debianbanner", sDebianBanner, SSHCFG_GLOBAL },
+        { NULL, sBadOption, 0 }
+ };
+ 
+@@ -1867,6 +1872,10 @@ process_server_config_line(ServerOptions *options, char *line,
+                        options->fingerprint_hash = value;
+                break;
+ 
++       case sDebianBanner:
++               intptr = &options->debian_banner;
++               goto parse_int;
++
+        case sDeprecated:
+                logit("%s line %d: Deprecated option %s",
+                    filename, linenum, arg);
+diff --git a/servconf.h b/servconf.h
+index 778ba17..161fa37 100644
+--- a/servconf.h
++++ b/servconf.h
+@@ -197,6 +197,8 @@ typedef struct {
+        char   *auth_methods[MAX_AUTH_METHODS];
+ 
+        int     fingerprint_hash;
++
++       int     debian_banner;
+ }       ServerOptions;
+ 
+ /* Information about the incoming connection as used by Match */
+diff --git a/sshd.c b/sshd.c
+index 189d34a..8d17521 100644
+--- a/sshd.c
++++ b/sshd.c
+@@ -443,7 +443,8 @@ sshd_exchange_identification(int sock_in, int sock_out)
+        }
+ 
+        xasprintf(&server_version_string, "SSH-%d.%d-%.100s%s%s%s",
+-           major, minor, SSH_RELEASE,
++           major, minor,
++           options.debian_banner ? SSH_RELEASE : SSH_RELEASE_MINIMUM,
+            *options.version_addendum == '\0' ? "" : " ",
+            options.version_addendum, newline);
+ 
+diff --git a/sshd_config.5 b/sshd_config.5
+index c8ee35d..b149bd3 100644
+--- a/sshd_config.5
++++ b/sshd_config.5
+@@ -533,6 +533,11 @@ or
+ .Dq no .
+ The default is
+ .Dq delayed .
++.It Cm DebianBanner
++Specifies whether the distribution-specified extra version suffix is
++included during initial protocol handshake.
++The default is
++.Dq yes .
+ .It Cm DenyGroups
+ This keyword can be followed by a list of group name patterns, separated
+ by spaces.