From 9719c17d19c97e7a9c86db6dbec4411deb0d17d3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9D=8E=E9=80=9A=E6=B4=B2?= <zhangsongcui3371@sina.com>
Date: Mon, 10 Jul 2023 16:13:10 +0800
Subject: [PATCH] LM (Linux): detect sshd version

---
 src/detection/lm/lm_linux.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/src/detection/lm/lm_linux.c b/src/detection/lm/lm_linux.c
index 0ce9cd8b0..93137bcd6 100644
--- a/src/detection/lm/lm_linux.c
+++ b/src/detection/lm/lm_linux.c
@@ -24,6 +24,23 @@ static const char* getGdmVersion(FFstrbuf* version)
     return NULL;
 }
 
+static const char* getSshdVersion(FFstrbuf* version)
+{
+    const char* error = ffProcessAppendStdErr(version, (char* const[]) {
+        "sshd",
+        "-qv",
+        NULL
+    });
+    if (error)
+        return error;
+
+    // unknown option -- v
+    // OpenSSH_9.0p1, OpenSSL 3.0.9 30 May 2023...
+    ffStrbufSubstrBeforeFirstC(version, ',');
+    ffStrbufSubstrAfterFirstC(version, '_');
+    return NULL;
+}
+
 #ifdef FF_HAVE_ZLIB
 #include "common/library.h"
 #include <stdlib.h>
@@ -147,6 +164,8 @@ const char* ffDetectLM(FFLMResult* result)
         getXfwmVersion(&result->version);
     else if (ffStrbufStartsWithS(&result->service, "lightdm"))
         getLightdmVersion(&result->version);
+    else if (ffStrbufStartsWithS(&result->service, "sshd"))
+        getSshdVersion(&result->version);
 
     // Correct char cases
     if (ffStrbufIgnCaseEqualS(&result->type, FF_WM_PROTOCOL_WAYLAND))