From 4b99a5f4d13041510fe0e8bcb98b33fa02a42456 Mon Sep 17 00:00:00 2001
From: andres <999999999e9@gmail.com>
Date: Sat, 24 Oct 2020 11:07:16 +1000
Subject: [PATCH] Added support for V3

Added support for version 3.
All the existing issues with v1 and v2c are also with v3 e.g.
https://github.com/node-red/node-red-nodes/issues/679
snmp walker will not return more than 1000 objects, all following objects cannot be accessed
Incorrect encryption (privacy) passphrase gives a timeout and not an error (protocol limitation?)
Incorrect community string gives a timeout and not an error (protocol limitation?)
Changes to the node are made with following details:
Node-red v1.2.2
Node.js v12.6.0
Windows_NT 10.0.19841 x64 LE
---
 io/snmp/README.md    |  82 +++++++++--
 io/snmp/package.json |   7 +-
 io/snmp/snmp.html    | 328 +++++++++++++++++++++++++++++++++++++------
 io/snmp/snmp.js      | 207 ++++++++++++++++++++++++---
 4 files changed, 545 insertions(+), 79 deletions(-)

diff --git a/io/snmp/README.md b/io/snmp/README.md
index 5067b11b..8caa1b28 100644
--- a/io/snmp/README.md
+++ b/io/snmp/README.md
@@ -18,9 +18,15 @@ Usage
 
 SNMP oids fetcher. Can fetch a single or comma separated list of oids. Triggered by any input.
 
-`msg.host` may contain the host.
+`msg.host` may contain the host including the port.
 
-`msg.community` may contain the community.
+`msg.community` may contain the community. (v1 and v2c only)
+
+`msg.username` may contain the username. (v3 only)
+
+`msg.authkey` may contain the digest security key. (v3 only)
+
+`msg.privkey` may contain the encryption security key. (v3 only)
 
 `msg.oid` may contain a comma separated list of oids to search for. (no spaces)
 
@@ -28,6 +34,12 @@ The host configured in the edit config will override `msg.host`. Leave blank if
 
 The community configured in the edit config will override `msg.community`. Leave blank if you want to use `msg.community` to provide input.
 
+The username configured in the edit config will override `msg.username`. Leave blank if you want to use `msg.username` to provide input.
+
+The digest security key configured in the edit config will override `msg.authkey`. Leave blank if you want to use `msg.authkey` to provide input.
+
+The encryption security key configured in the edit config will override `msg.privkey`. Leave blank if you want to use `msg.privkey` to provide input.
+
 The oids configured in the edit config will override `msg.oid`. Leave blank if you
 want to use `msg.oid` to provide input.
 
@@ -38,9 +50,15 @@ Values depends on the oids being requested.
 
 SNMP sets the value of one or more OIDs.
 
-`msg.host` may contain the host.
+`msg.host` may contain the host including the port.
 
-`msg.community` may contain the community.
+`msg.community` may contain the community. (v1 and v2c only)
+
+`msg.username` may contain the username. (v3 only)
+
+`msg.authkey` may contain the digest security key. (v3 only)
+
+`msg.privkey` may contain the encryption security key. (v3 only)
 
 `msg.varbinds` may contain an array of varbind JSON objects e.g.:
 ```
@@ -81,6 +99,12 @@ The host configured in the edit config will override `msg.host`. Leave blank if
 
 The community configured in the edit config will override `msg.community`. Leave blank if you want to use `msg.community` to provide input.
 
+The username configured in the edit config will override `msg.username`. Leave blank if you want to use `msg.username` to provide input.
+
+The digest security key configured in the edit config will override `msg.authkey`. Leave blank if you want to use `msg.authkey` to provide input.
+
+The encryption security key configured in the edit config will override `msg.privkey`. Leave blank if you want to use `msg.privkey` to provide input.
+
 The varbinds configured in the edit config will override `msg.varbinds`. Leave blank if you want to use `msg.varbinds` to provide input.
 
 
@@ -89,16 +113,28 @@ The varbinds configured in the edit config will override `msg.varbinds`. Leave b
 
 Simple SNMP table oid fetcher. Triggered by any input.
 
-`msg.host` may contain the host.
+`msg.host` may contain the host including the port.
 
-`msg.community` may contain the community.
+`msg.community` may contain the community. (v1 and v2c only)
 
-`msg.oid` may contain the oid of a single table to search for.
+`msg.username` may contain the username. (v3 only)
+
+`msg.authkey` may contain the digest security key. (v3 only)
+
+`msg.privkey` may contain the encryption security key. (v3 only)
+
+`msg.oid` may contain a comma separated list of oids to search for. (no spaces)
 
 The host configured in the edit config will override `msg.host`. Leave blank if you want to use `msg.host` to provide input.
 
 The community configured in the edit config will override `msg.community`. Leave blank if you want to use `msg.community` to provide input.
 
+The username configured in the edit config will override `msg.username`. Leave blank if you want to use `msg.username` to provide input.
+
+The digest security key configured in the edit config will override `msg.authkey`. Leave blank if you want to use `msg.authkey` to provide input.
+
+The encryption security key configured in the edit config will override `msg.privkey`. Leave blank if you want to use `msg.privkey` to provide input.
+
 The oid configured in the edit config will override `msg.oid`. Leave blank if you
 want to use `msg.oid` to provide input.
 
@@ -109,9 +145,15 @@ Values depends on the oids being requested.
 
 Simple SNMP oid subtree fetcher. Triggered by any input. Reads from OID specified and any below it.
 
-`msg.host` may contain the host.
+`msg.host` may contain the host including the port.
 
-`msg.community` may contain the community.
+`msg.community` may contain the community. (v1 and v2c only)
+
+`msg.username` may contain the username. (v3 only)
+
+`msg.authkey` may contain the digest security key. (v3 only)
+
+`msg.privkey` may contain the encryption security key. (v3 only)
 
 `msg.oid` may contain the oid of a single table to search for.
 
@@ -119,6 +161,12 @@ The host configured in the edit config will override `msg.host`. Leave blank if
 
 The community configured in the edit config will override `msg.community`. Leave blank if you want to use `msg.community` to provide input.
 
+The username configured in the edit config will override `msg.username`. Leave blank if you want to use `msg.username` to provide input.
+
+The digest security key configured in the edit config will override `msg.authkey`. Leave blank if you want to use `msg.authkey` to provide input.
+
+The encryption security key configured in the edit config will override `msg.privkey`. Leave blank if you want to use `msg.privkey` to provide input.
+
 The oid configured in the edit config will override `msg.oid`. Leave blank if you
 want to use `msg.oid` to provide input.
 
@@ -129,9 +177,15 @@ Values depends on the oids being requested.
 
 Simple SNMP oid walker fetcher. Triggered by any input. Reads from OID specified to the end of the table.
 
-`msg.host` may contain the host.
+`msg.host` may contain the host including the port.
 
-`msg.community` may contain the community.
+`msg.community` may contain the community. (v1 and v2c only)
+
+`msg.username` may contain the username. (v3 only)
+
+`msg.authkey` may contain the digest security key. (v3 only)
+
+`msg.privkey` may contain the encryption security key. (v3 only)
 
 `msg.oid` may contain the oid of a single table to search for.
 
@@ -139,6 +193,12 @@ The host configured in the edit config will override `msg.host`. Leave blank if
 
 The community configured in the edit config will override `msg.community`. Leave blank if you want to use `msg.community` to provide input.
 
+The username configured in the edit config will override `msg.username`. Leave blank if you want to use `msg.username` to provide input.
+
+The digest security key configured in the edit config will override `msg.authkey`. Leave blank if you want to use `msg.authkey` to provide input.
+
+The encryption security key configured in the edit config will override `msg.privkey`. Leave blank if you want to use `msg.privkey` to provide input.
+
 The oid configured in the edit config will override `msg.oid`. Leave blank if you
 want to use `msg.oid` to provide input.
 
diff --git a/io/snmp/package.json b/io/snmp/package.json
index c2c118f7..f812391e 100644
--- a/io/snmp/package.json
+++ b/io/snmp/package.json
@@ -1,9 +1,9 @@
 {
     "name"          : "node-red-node-snmp",
-    "version"       : "0.0.25",
+    "version"       : "0.0.26",
     "description"   : "A Node-RED node that looks for SNMP oids.",
     "dependencies"  : {
-        "net-snmp"  : "1.2.4"
+        "net-snmp"  : "2.9.6"
     },
     "repository" : {
         "type":"git",
@@ -23,6 +23,7 @@
     },
     "contributors": [
         { "name": "Mika Karaila" },
-        { "name": "Bryan Malyn" }
+        { "name": "Bryan Malyn" },
+		{ "name": "Andres" }
     ]
 }
diff --git a/io/snmp/snmp.html b/io/snmp/snmp.html
index 4cd13ef8..0df25340 100644
--- a/io/snmp/snmp.html
+++ b/io/snmp/snmp.html
@@ -3,19 +3,56 @@
         <label for="node-input-host"><i class="fa fa-globe"></i> Host</label>
         <input type="text" id="node-input-host" placeholder="ip address(:optional port)">
     </div>
-    <div class="form-row">
-        <label for="node-input-community"><i class="fa fa-user"></i> Community</label>
-        <input type="text" id="node-input-community" placeholder="public">
-    </div>
     <div class="form-row">
         <label for="node-input-version"><i class="fa fa-bookmark"></i> Version</label>
         <select type="text" id="node-input-version" style="width:150px;">
-            <option value="1">v1</option>
-            <option value="2c">v2c</option>
+            <option value="v1">v1</option>
+            <option value="v2c">v2c</option>
+           <option value="v3">v3</option>
         </select>
         <span style="margin-left:50px;">Timeout</span>
         <input type="text" id="node-input-timeout" placeholder="secs" style="width:50px; direction:rtl; vertical-align:baseline;">&nbsp;S
     </div>
+    <div class="form-row">
+        <label for="node-input-community"><i class="fa fa-user"></i> Community</label>
+        <input type="text" id="node-input-community" placeholder="public">
+    </div>
+	<!-- Following Data is used for V3 Only -->
+	<div class="form-row">
+        <label for="node-input-username"><i class="fa fa-user"></i> Username</label>
+        <input type="text" id="node-input-username" placeholder="username">
+    </div>
+    <div class="form-row">
+        <label for="node-input-auth"><i class="fa fa-user-secret"></i> Auth. </label>
+        <select type="text" id="node-input-auth" style="width:150px;">
+            <option value="noAuthNoPriv">noAuthNoPriv</option>
+            <option value="authNoPriv">authNoPriv</option>
+            <option value="authPriv">authPriv</option>
+        </select>
+	</div>
+    <div class="form-row">
+        <label for="node-input-authprot"><i class="fa fa-user-secret"></i> Auth.Prot. </label>
+        <select type="text" id="node-input-authprot" style="width:150px;">
+            <option value="None">None</option>
+            <option value="MD5">MD5</option>
+            <option value="SHA">SHA</option>
+        </select>
+        <span style="margin-left:50px;">Priv.Prot.</span>
+        <select type="text" id="node-input-privprot" style="width:150px;">
+            <option value="None">None</option>
+            <option value="DES">DES</option>
+            <option value="AES">AES</option>
+        </select>
+    </div>
+    <div class="form-row">
+        <label for="node-input-authkey"><i class="fa fa-user"></i> Auth.Key</label>
+        <input type="password" id="node-input-authkey" placeholder="Authentication key">
+    </div>
+    <div class="form-row">
+        <label for="node-input-privkey"><i class="fa fa-user"></i> Priv.Key</label>
+        <input type="password" id="node-input-privkey" placeholder="Encryption key">
+    </div>
+    <!-- End of unique data for V3 -->	
     <div class="form-row">
         <label for="node-input-oids"><i class="fa fa-tags"></i> OIDs</label>
         <textarea rows="4" cols="60" id="node-input-oids" placeholder="e.g. 1.3.6.1.2.1.1.5.0" style="width:70%;"></textarea>
@@ -31,6 +68,9 @@
     <p>Simple SNMP oid or oid list fetcher. Triggered by any input.</p>
     <p><code>msg.host</code> may contain the host.</p>
     <p><code>msg.community</code> may contain the community.</p>
+    <p><code>msg.username</code> may contain the username.</p>
+    <p><code>msg.authkey</code> may contain the digest security key.</p>
+    <p><code>msg.privkey</code> may contain the encryption security key.</p>
     <p><code>msg.oid</code> may contain a comma separated list of oids to request. (no spaces)</p>
     <p>OIDs must be numeric. iso. is the same a 1. </p>
     <p>The node will output <code>msg.payload</code> and <code>msg.oid</code>.</p>
@@ -42,10 +82,16 @@
         color: "YellowGreen",
         defaults: {
             host: { value: "127.0.0.1" },
-            community: { value: "public" },
-            version: { value: "1", required: true },
-            oids: { value: "" },
+            version: { value: "v1", required: true },
             timeout: { value: 5 },
+            community: { value: "public" },
+            username: { value: "" },
+            auth: { value: "noAuthNoPriv", required: true },
+            authprot: { value: "None", required: true },
+            privprot: { value: "None", required: true },
+            authkey: { value: "" },
+            privkey: { value: "" },
+            oids: { value: "" },
             name: { value: "" }
         },
         inputs: 1,
@@ -65,19 +111,58 @@
         <label for="node-input-host"><i class="fa fa-globe"></i> Host</label>
         <input type="text" id="node-input-host" placeholder="ip address(:optional port)">
     </div>
-    <div class="form-row">
-        <label for="node-input-community"><i class="fa fa-user"></i> Community</label>
-        <input type="text" id="node-input-community" placeholder="public">
-    </div>
     <div class="form-row">
         <label for="node-input-version"><i class="fa fa-bookmark"></i> Version</label>
         <select type="text" id="node-input-version" style="width:150px;">
-            <option value="1">v1</option>
-            <option value="2c">v2c</option>
+            <option value="v1">v1</option>
+            <option value="v2c">v2c</option>
+			<!-- Following Data is used for V3 Only -->
+            <option value="v3">v3</option>
+			<!-- End of unique data for V3 -->	
         </select>
         <span style="margin-left:50px;">Timeout</span>
         <input type="text" id="node-input-timeout" placeholder="secs" style="width:50px; direction:rtl; vertical-align:baseline;">&nbsp;S
     </div>
+    <div class="form-row">
+        <label for="node-input-community"><i class="fa fa-user"></i> Community</label>
+        <input type="text" id="node-input-community" placeholder="public">
+    </div>
+	<!-- Following Data is used for V3 Only -->
+	<div class="form-row">
+        <label for="node-input-username"><i class="fa fa-user"></i> Username</label>
+        <input type="text" id="node-input-username" placeholder="username">
+    </div>
+    <div class="form-row">
+        <label for="node-input-auth"><i class="fa fa-user-secret"></i> Auth. </label>
+        <select type="text" id="node-input-auth" style="width:150px;">
+            <option value="noAuthNoPriv">noAuthNoPriv</option>
+            <option value="authNoPriv">authNoPriv</option>
+            <option value="authPriv">authPriv</option>
+        </select>
+	</div>
+    <div class="form-row">
+        <label for="node-input-authprot"><i class="fa fa-user-secret"></i> Auth.Prot. </label>
+        <select type="text" id="node-input-authprot" style="width:150px;">
+            <option value="None">None</option>
+            <option value="MD5">MD5</option>
+            <option value="SHA">SHA</option>
+        </select>
+        <span style="margin-left:50px;">Priv.Prot.</span>
+        <select type="text" id="node-input-privprot" style="width:150px;">
+            <option value="None">None</option>
+            <option value="DES">DES</option>
+            <option value="AES">AES</option>
+        </select>
+    </div>
+    <div class="form-row">
+        <label for="node-input-authkey"><i class="fa fa-user"></i> Auth.Key</label>
+        <input type="password" id="node-input-authkey" placeholder="Authentication key">
+    </div>
+    <div class="form-row">
+        <label for="node-input-privkey"><i class="fa fa-user"></i> Priv.Key</label>
+        <input type="password" id="node-input-privkey" placeholder="Encryption key">
+    </div>
+    <!-- End of unique data for V3 -->	
     <div class="form-row">
         <label for="node-input-varbinds"><i class="fa fa-tags"></i> Varbinds</label>
         <textarea rows="10" cols="60" id="node-input-varbinds" placeholder="e.g. [ { &quot;oid&quot;: &quot;1.3.6.1.2.1.1.5.0&quot;,&quot;type&quot;: &quot;OctetString&quot;,&quot;value&quot;: &quot;host1&quot;},{&quot;oid&quot;: &quot;1.3.6.1.2.1.1.6.0&quot;,&quot;type&quot;: &quot;OctetString&quot;,value: &quot;somewhere&quot;}]"
@@ -94,6 +179,9 @@
     <p>Simple snmp Set node. Trigger by any input</p>
     <p><code>msg.host</code> may contain the host.</p>
     <p><code>msg.community</code> may contain the community.</p>
+    <p><code>msg.username</code> may contain the username.</p>
+    <p><code>msg.authkey</code> may contain the digest security key.</p>
+    <p><code>msg.privkey</code> may contain the encryption security key.</p>
     <p><code>msg.varbinds</code> may contain varbinds as an array of json objects containing multiple oids, types and values.
         <pre>[
     {
@@ -114,10 +202,16 @@
         color: "YellowGreen",
         defaults: {
             host: { value: "127.0.0.1" },
-            community: { value: "public" },
-            version: { value: "1", required: true },
-            varbinds: { value: "" },
+            version: { value: "v1", required: true },
             timeout: { value: 5 },
+            community: { value: "public" },
+            username: { value: "" },
+            auth: { value: "noAuthNoPriv", required: true },
+            authprot: { value: "None", required: true },
+            privprot: { value: "None", required: true },
+            authkey: { value: "" },
+            privkey: { value: "" },
+            varbinds: { value: "" },
             name: { value: "" }
         },
         inputs: 1,
@@ -137,19 +231,58 @@
         <label for="node-input-host"><i class="fa fa-globe"></i> Host</label>
         <input type="text" id="node-input-host" placeholder="ip address(:optional port)">
     </div>
-    <div class="form-row">
-        <label for="node-input-community"><i class="fa fa-user"></i> Community</label>
-        <input type="text" id="node-input-community" placeholder="public">
-    </div>
     <div class="form-row">
         <label for="node-input-version"><i class="fa fa-bookmark"></i> Version</label>
         <select type="text" id="node-input-version" style="width:150px;">
-            <option value="1">v1</option>
-            <option value="2c">v2c</option>
+            <option value="v1">v1</option>
+            <option value="v2c">v2c</option>
+			<!-- Following Data is used for V3 Only -->
+            <option value="v3">v3</option>
+			<!-- End of unique data for V3 -->	
         </select>
         <span style="margin-left:50px;">Timeout</span>
         <input type="text" id="node-input-timeout" placeholder="secs" style="width:50px; direction:rtl; vertical-align:baseline;">&nbsp;S
     </div>
+    <div class="form-row">
+        <label for="node-input-community"><i class="fa fa-user"></i> Community</label>
+        <input type="text" id="node-input-community" placeholder="public">
+    </div>
+	<!-- Following Data is used for V3 Only -->
+	<div class="form-row">
+        <label for="node-input-username"><i class="fa fa-user"></i> Username</label>
+        <input type="text" id="node-input-username" placeholder="username">
+    </div>
+    <div class="form-row">
+        <label for="node-input-auth"><i class="fa fa-user-secret"></i> Auth. </label>
+        <select type="text" id="node-input-auth" style="width:150px;">
+            <option value="noAuthNoPriv">noAuthNoPriv</option>
+            <option value="authNoPriv">authNoPriv</option>
+            <option value="authPriv">authPriv</option>
+        </select>
+	</div>
+    <div class="form-row">
+        <label for="node-input-authprot"><i class="fa fa-user-secret"></i> Auth.Prot. </label>
+        <select type="text" id="node-input-authprot" style="width:150px;">
+            <option value="None">None</option>
+            <option value="MD5">MD5</option>
+            <option value="SHA">SHA</option>
+        </select>
+        <span style="margin-left:50px;">Priv.Prot.</span>
+        <select type="text" id="node-input-privprot" style="width:150px;">
+            <option value="None">None</option>
+            <option value="DES">DES</option>
+            <option value="AES">AES</option>
+        </select>
+    </div>
+    <div class="form-row">
+        <label for="node-input-authkey"><i class="fa fa-user"></i> Auth.Key</label>
+        <input type="password" id="node-input-authkey" placeholder="Authentication key">
+    </div>
+    <div class="form-row">
+        <label for="node-input-privkey"><i class="fa fa-user"></i> Priv.Key</label>
+        <input type="password" id="node-input-privkey" placeholder="Encryption key">
+    </div>
+    <!-- End of unique data for V3 -->	
     <div class="form-row">
         <label for="node-input-oids"><i class="fa fa-tags"></i> OID</label>
         <input type="text" id="node-input-oids" placeholder="e.g. 1.3.6.1.2.1.1.5.0">
@@ -165,6 +298,9 @@
     <p>Simple SNMP oid table fetcher. Triggered by any input.</p>
     <p><code>msg.host</code> may contain the host.</p>
     <p><code>msg.community</code> may contain the community.</p>
+    <p><code>msg.username</code> may contain the username.</p>
+    <p><code>msg.authkey</code> may contain the digest security key.</p>
+    <p><code>msg.privkey</code> may contain the encryption security key.</p>
     <p><code>msg.oid</code> may contain the oid of a table to request.</p>
     <p>OID must be numeric. iso. is the same a 1.</p>
     <p>The node will output <code>msg.payload</code> and <code>msg.oid</code>.</p>
@@ -176,10 +312,16 @@
         color: "YellowGreen",
         defaults: {
             host: { value: "127.0.0.1" },
-            community: { value: "public" },
-            version: { value: "1", required: true },
-            oids: { value: "" },
+            version: { value: "v1", required: true },
             timeout: { value: 5 },
+            community: { value: "public" },
+            username: { value: "" },
+            auth: { value: "noAuthNoPriv", required: true },
+            authprot: { value: "None", required: true },
+            privprot: { value: "None", required: true },
+            authkey: { value: "" },
+            privkey: { value: "" },
+            oids: { value: "" },
             name: { value: "" }
         },
         inputs: 1,
@@ -199,19 +341,58 @@
         <label for="node-input-host"><i class="fa fa-globe"></i> Host</label>
         <input type="text" id="node-input-host" placeholder="ip address(:optional port)">
     </div>
-    <div class="form-row">
-        <label for="node-input-community"><i class="fa fa-user"></i> Community</label>
-        <input type="text" id="node-input-community" placeholder="public">
-    </div>
     <div class="form-row">
         <label for="node-input-version"><i class="fa fa-bookmark"></i> Version</label>
         <select type="text" id="node-input-version" style="width:150px;">
-            <option value="1">v1</option>
-            <option value="2c">v2c</option>
+            <option value="v1">v1</option>
+            <option value="v2c">v2c</option>
+			<!-- Following Data is used for V3 Only -->
+            <option value="v3">v3</option>
+			<!-- End of unique data for V3 -->	
         </select>
         <span style="margin-left:50px;">Timeout</span>
         <input type="text" id="node-input-timeout" placeholder="secs" style="width:50px; direction:rtl; vertical-align:baseline;">&nbsp;S
     </div>
+    <div class="form-row">
+        <label for="node-input-community"><i class="fa fa-user"></i> Community</label>
+        <input type="text" id="node-input-community" placeholder="public">
+    </div>
+	<!-- Following Data is used for V3 Only -->
+	<div class="form-row">
+        <label for="node-input-username"><i class="fa fa-user"></i> Username</label>
+        <input type="text" id="node-input-username" placeholder="username">
+    </div>
+    <div class="form-row">
+        <label for="node-input-auth"><i class="fa fa-user-secret"></i> Auth. </label>
+        <select type="text" id="node-input-auth" style="width:150px;">
+            <option value="noAuthNoPriv">noAuthNoPriv</option>
+            <option value="authNoPriv">authNoPriv</option>
+            <option value="authPriv">authPriv</option>
+        </select>
+	</div>
+    <div class="form-row">
+        <label for="node-input-authprot"><i class="fa fa-user-secret"></i> Auth.Prot. </label>
+        <select type="text" id="node-input-authprot" style="width:150px;">
+            <option value="None">None</option>
+            <option value="MD5">MD5</option>
+            <option value="SHA">SHA</option>
+        </select>
+        <span style="margin-left:50px;">Priv.Prot.</span>
+        <select type="text" id="node-input-privprot" style="width:150px;">
+            <option value="None">None</option>
+            <option value="DES">DES</option>
+            <option value="AES">AES</option>
+        </select>
+    </div>
+    <div class="form-row">
+        <label for="node-input-authkey"><i class="fa fa-user"></i> Auth.Key</label>
+        <input type="password" id="node-input-authkey" placeholder="Authentication key">
+    </div>
+    <div class="form-row">
+        <label for="node-input-privkey"><i class="fa fa-user"></i> Priv.Key</label>
+        <input type="password" id="node-input-privkey" placeholder="Encryption key">
+    </div>
+    <!-- End of unique data for V3 -->	
     <div class="form-row">
         <label for="node-input-oids"><i class="fa fa-tags"></i> OID</label>
         <input type="text" id="node-input-oids" placeholder="e.g. 1.3.6.1.2.1.1.5.0">
@@ -227,6 +408,9 @@
     <p>Simple SNMP oid subtree fetcher. Triggered by any input. Reads all OIDS at and below the current base OID.</p>
     <p><code>msg.host</code> may contain the host.</p>
     <p><code>msg.community</code> may contain the community.</p>
+    <p><code>msg.username</code> may contain the username.</p>
+    <p><code>msg.authkey</code> may contain the digest security key.</p>
+    <p><code>msg.privkey</code> may contain the encryption security key.</p>
     <p><code>msg.oid</code> may contain the oid of a table to request.</p>
     <p>OID must be numeric. iso. is the same a 1. </p>
     <p>The node will output <code>msg.payload</code> and <code>msg.oid</code>.</p>
@@ -238,10 +422,16 @@
         color: "YellowGreen",
         defaults: {
             host: { value: "127.0.0.1" },
-            community: { value: "public" },
-            version: { value: "1", required: true },
-            oids: { value: "" },
+            version: { value: "v1", required: true },
             timeout: { value: 5 },
+            community: { value: "public" },
+            username: { value: "" },
+            auth: { value: "noAuthNoPriv", required: true },
+            authprot: { value: "None", required: true },
+            privprot: { value: "None", required: true },
+            authkey: { value: "" },
+            privkey: { value: "" },
+            oids: { value: "" },
             name: { value: "" }
         },
         inputs: 1,
@@ -262,19 +452,58 @@
         <label for="node-input-host"><i class="fa fa-globe"></i> Host</label>
         <input type="text" id="node-input-host" placeholder="ip address(:optional port)">
     </div>
-    <div class="form-row">
-        <label for="node-input-community"><i class="fa fa-user"></i> Community</label>
-        <input type="text" id="node-input-community" placeholder="public">
-    </div>
     <div class="form-row">
         <label for="node-input-version"><i class="fa fa-bookmark"></i> Version</label>
         <select type="text" id="node-input-version" style="width:150px;">
-            <option value="1">v1</option>
-            <option value="2c">v2c</option>
+            <option value="v1">v1</option>
+            <option value="v2c">v2c</option>
+			<!-- Following Data is used for V3 Only -->
+            <option value="v3">v3</option>
+			<!-- End of unique data for V3 -->	
         </select>
         <span style="margin-left:50px;">Timeout</span>
         <input type="text" id="node-input-timeout" placeholder="secs" style="width:50px; direction:rtl; vertical-align:baseline;">&nbsp;S
     </div>
+    <div class="form-row">
+        <label for="node-input-community"><i class="fa fa-user"></i> Community</label>
+        <input type="text" id="node-input-community" placeholder="public">
+    </div>
+	<!-- Following Data is used for V3 Only -->
+	<div class="form-row">
+        <label for="node-input-username"><i class="fa fa-user"></i> Username</label>
+        <input type="text" id="node-input-username" placeholder="username">
+    </div>
+    <div class="form-row">
+        <label for="node-input-auth"><i class="fa fa-user-secret"></i> Auth. </label>
+        <select type="text" id="node-input-auth" style="width:150px;">
+            <option value="noAuthNoPriv">noAuthNoPriv</option>
+            <option value="authNoPriv">authNoPriv</option>
+            <option value="authPriv">authPriv</option>
+        </select>
+	</div>
+    <div class="form-row">
+        <label for="node-input-authprot"><i class="fa fa-user-secret"></i> Auth.Prot. </label>
+        <select type="text" id="node-input-authprot" style="width:150px;">
+            <option value="None">None</option>
+            <option value="MD5">MD5</option>
+            <option value="SHA">SHA</option>
+        </select>
+        <span style="margin-left:50px;">Priv.Prot.</span>
+        <select type="text" id="node-input-privprot" style="width:150px;">
+            <option value="None">None</option>
+            <option value="DES">DES</option>
+            <option value="AES">AES</option>
+        </select>
+    </div>
+    <div class="form-row">
+        <label for="node-input-authkey"><i class="fa fa-user"></i> Auth.Key</label>
+        <input type="password" id="node-input-authkey" placeholder="Authentication key">
+    </div>
+    <div class="form-row">
+        <label for="node-input-privkey"><i class="fa fa-user"></i> Priv.Key</label>
+        <input type="password" id="node-input-privkey" placeholder="Encryption key">
+    </div>
+    <!-- End of unique data for V3 -->	
     <div class="form-row">
         <label for="node-input-oids"><i class="fa fa-tags"></i> OID</label>
         <input type="text" id="node-input-oids" placeholder="e.g. 1.3.6.1.2.1.1.5.0">
@@ -291,6 +520,9 @@
     Fetches all nodes from this OID to the end of the table.</p>
     <p><code>msg.host</code> may contain the host.</p>
     <p><code>msg.community</code> may contain the community.</p>
+    <p><code>msg.username</code> may contain the username.</p>
+    <p><code>msg.authkey</code> may contain the digest security key.</p>
+    <p><code>msg.privkey</code> may contain the encryption security key.</p>
     <p><code>msg.oid</code> may contain the oid of a table to request.</p>
     <p>OID must be numeric. iso. is the same a 1. </p>
     <p>The node will output <code>msg.payload</code> and <code>msg.oid</code>.</p>
@@ -304,10 +536,16 @@
         color: "YellowGreen",
         defaults: {
             host: { value: "127.0.0.1" },
-            community: { value: "public" },
-            version: { value: "1", required: true },
-            oids: { value: "" },
+            version: { value: "v1", required: true },
             timeout: { value: 5 },
+            community: { value: "public" },
+            username: { value: "" },
+            auth: { value: "noAuthNoPriv", required: true },
+            authprot: { value: "None", required: true },
+            privprot: { value: "None", required: true },
+            authkey: { value: "" },
+            privkey: { value: "" },
+            oids: { value: "" },
             name: { value: "" }
         },
         inputs: 1,
diff --git a/io/snmp/snmp.js b/io/snmp/snmp.js
index bac37c6e..29fd102e 100644
--- a/io/snmp/snmp.js
+++ b/io/snmp/snmp.js
@@ -5,34 +5,91 @@ module.exports = function (RED) {
 
     var sessions = {};
 
-    function getSession(host, community, version, timeout) {
-        var sessionKey = host + ":" + community + ":" + version;
-        var port = 161;
+    function openSession(host, data, options) {
+        //console.log({data});
+        //console.log({options});
+        var sessionid = data.sessionid;
+        options.port = 161;
         if (host.indexOf(":") !== -1) {
-            port = host.split(":")[1];
+            options.port = host.split(":")[1];
             host = host.split(":")[0];
         }
-        if (!(sessionKey in sessions)) {
-            sessions[sessionKey] = snmp.createSession(host, community, { port:port, version:version, timeout:(timeout || 5000) });
+        // SNMPv3 call
+        if (options.version === "v3"){
+            var user = {};
+            options.version = snmp.Version3;
+            user.name = data.name || "";
+            user.level = snmp.SecurityLevel.noAuthNoPriv;
+            if (data.auth === "authNoPriv" || data.auth === "authPriv" ) {
+                user.level = snmp.SecurityLevel.authNoPriv;
+                user.authKey = data.authkey || "";
+                user.authProtocol = (data.authprot === "SHA") ? snmp.AuthProtocols.sha : snmp.AuthProtocols.md5;
+                if (data.auth === "authPriv" ) {
+                    user.level = snmp.SecurityLevel.authPriv;
+                    if (data.privprot === "DES" || data.privprot === "AES"){
+                        user.privProtocol = (data.privprot === "AES") ? snmp.PrivProtocols.aes : snmp.PrivProtocols.des;
+                        user.privKey = data.privkey || "";
+                    }
+                }
+            }
+            sessions[sessionid] = snmp.createV3Session(host, user, options);
         }
-        return sessions[sessionKey];
+        // SNMPv1 or SNMPv2c call
+        else{
+            var community = data.community;
+            options.version = (options.version === "v2c") ? snmp.Version2c : snmp.Version1;
+            sessions[sessionid] = snmp.createSession(host, community, options);
+        }
+        return sessions[sessionid];
+    }
+
+    // Any session needs to be closed after completion
+    function closeSession(sessionid) {
+        //console.log("closing session");
+        sessions[sessionid].close();
     }
 
     function SnmpNode(n) {
         RED.nodes.createNode(this, n);
         this.community = n.community;
         this.host = n.host;
-        this.version = (n.version === "2c") ? snmp.Version2c : snmp.Version1;
+        this.version = n.version;
+        this.username = n.username;
+        this.auth = n.auth;
+        this.authprot = n.authprot;
+        this.privprot = n.privprot;
+        this.authkey = n.authkey;
+        this.privkey = n.privkey;
         this.oids = n.oids.replace(/\s/g, "");
         this.timeout = Number(n.timeout || 5) * 1000;
         var node = this;
 
         this.on("input", function (msg) {
             var host = node.host || msg.host;
+            var version = node.version;
             var community = node.community || msg.community;
+            var username = node.username || msg.username;
+            var auth = node.auth;
+            var authprot = node.authprot;
+            var privprot = node.privprot;
+            var authkey = node.authkey || msg.authkey;
+            var privkey = node.privkey || msg.privkey;
             var oids = node.oids || msg.oid;
+            var sessionid = Date.now(); // Create an unique session ID for each call
+            var data = {};
+            data.community = community;
+            data.name = username;
+            data.auth = auth;
+            data.authprot = authprot;
+            data.privprot = privprot;
+            data.authkey = authkey;
+            data.privkey = privkey;
+            data.sessionid = sessionid;
+            var options = {};
+            options.version = version;
+            options.timeout = node.timeout;
             if (oids) {
-                getSession(host, community, node.version, node.timeout).get(oids.split(","), function (error, varbinds) {
+                openSession(host, data, options).get(oids.split(","), function (error, varbinds) {
                     if (error) {
                         node.error(error.toString(), msg);
                     }
@@ -44,13 +101,14 @@ module.exports = function (RED) {
                             else {
                                 if (varbinds[i].type == 4) { varbinds[i].value = varbinds[i].value.toString(); }
                                 varbinds[i].tstr = snmp.ObjectType[varbinds[i].type];
-                                //node.log(varbinds[i].oid + "|" + varbinds[i].tstr + "|" + varbinds[i].value);
+                                // node.log(varbinds[i].oid + "|" + varbinds[i].tstr + "|" + varbinds[i].value);
                             }
                         }
                         msg.oid = oids;
                         msg.payload = varbinds;
                         node.send(msg);
                     }
+                    closeSession(sessionid); // Needed to close the session else a bad or good read could affect future readings
                 });
             }
             else {
@@ -64,20 +122,46 @@ module.exports = function (RED) {
         RED.nodes.createNode(this, n);
         this.community = n.community;
         this.host = n.host;
-        this.version = (n.version === "2c") ? snmp.Version2c : snmp.Version1;
-        this.varbinds = n.varbinds;
+        this.version = n.version;
+        this.username = n.username;
+        this.auth = n.auth;
+        this.authprot = n.authprot;
+        this.privprot = n.privprot;
+        this.authkey = n.authkey;
+        this.privkey = n.privkey;
         this.timeout = Number(n.timeout || 5) * 1000;
+        this.varbinds = n.varbinds;
         if (this.varbinds && this.varbinds.trim().length === 0) { delete this.varbinds; }
         var node = this;
         this.on("input", function (msg) {
             var host = node.host || msg.host;
+            var version = node.version;
             var community = node.community || msg.community;
+            var username = node.username || msg.username;
+            var auth = node.auth;
+            var authprot = node.authprot;
+            var privprot = node.privprot;
+            var authkey = node.authkey || msg.authkey;
+            var privkey = node.privkey || msg.privkey;
+            var sessionid = Date.now();
+            var data = {};
+            data.community = community;
+            data.name = username;
+            data.auth = auth;
+            data.authprot = authprot;
+            data.privprot = privprot;
+            data.authkey = authkey;
+            data.privkey = privkey;
+            data.sessionid = sessionid;
+            var options = {};
+            options.version = version;
+            options.timeout = node.timeout;
             var varbinds = (node.varbinds) ? JSON.parse(node.varbinds) : msg.varbinds;
             if (varbinds) {
                 for (var i = 0; i < varbinds.length; i++) {
                     varbinds[i].type = snmp.ObjectType[varbinds[i].type];
                 }
-                getSession(host, community, node.version, node.timeout).set(varbinds, function (error, varbinds) {
+                openSession(host, data, options).set(varbinds, function (error, varbinds) {
                     if (error) {
                         node.error(error.toString(), msg);
                     }
@@ -89,6 +173,7 @@ module.exports = function (RED) {
                             }
                         }
                     }
+                    closeSession(sessionid);
                 });
             }
             else {
@@ -104,7 +189,13 @@ module.exports = function (RED) {
         RED.nodes.createNode(this, n);
         this.community = n.community;
         this.host = n.host;
-        this.version = (n.version === "2c") ? snmp.Version2c : snmp.Version1;
+        this.version = n.version;
+        this.username = n.username;
+        this.auth = n.auth;
+        this.authprot = n.authprot;
+        this.privprot = n.privprot;
+        this.authkey = n.authkey;
+        this.privkey = n.privkey;
         this.oids = n.oids.replace(/\s/g, "");
         this.timeout = Number(n.timeout || 5) * 1000;
         var node = this;
@@ -118,11 +209,32 @@ module.exports = function (RED) {
 
         this.on("input", function (msg) {
             var host = node.host || msg.host;
+            var version = node.version;
             var community = node.community || msg.community;
+            var username = node.username || msg.username;
+            var auth = node.auth;
+            var authprot = node.authprot;
+            var privprot = node.privprot;
+            var authkey = node.authkey || msg.authkey;
+            var privkey = node.privkey || msg.privkey;
             var oids = node.oids || msg.oid;
+            var sessionid = Date.now();
+            var data = {};
+            data.community = community;
+            data.name = username;
+            data.auth = auth;
+            data.authprot = authprot;
+            data.privprot = privprot;
+            data.authkey = authkey;
+            data.privkey = privkey;
+            data.sessionid = sessionid;
+            var options = {};
+            options.version = version;
+            options.timeout = node.timeout;
+            node.log({options});
             if (oids) {
                 msg.oid = oids;
-                getSession(host, community, node.version, node.timeout).table(oids, maxRepetitions, function (error, table) {
+                openSession(host, data, options).table(oids, maxRepetitions, function (error, table) {
                     if (error) {
                         node.error(error.toString(), msg);
                     }
@@ -150,6 +262,7 @@ module.exports = function (RED) {
                         msg.payload = table;
                         node.send(msg);
                     }
+                    closeSession(sessionid);
                 });
             }
             else {
@@ -164,7 +277,13 @@ module.exports = function (RED) {
         RED.nodes.createNode(this, n);
         this.community = n.community;
         this.host = n.host;
-        this.version = (n.version === "2c") ? snmp.Version2c : snmp.Version1;
+        this.version = n.version;
+        this.username = n.username;
+        this.auth = n.auth;
+        this.authprot = n.authprot;
+        this.privprot = n.privprot;
+        this.authkey = n.authkey;
+        this.privkey = n.privkey;
         this.oids = n.oids.replace(/\s/g, "");
         this.timeout = Number(n.timeout || 5) * 1000;
         var node = this;
@@ -185,11 +304,31 @@ module.exports = function (RED) {
 
         this.on("input", function (msg) {
             var host = node.host || msg.host;
+            var version = node.version;
             var community = node.community || msg.community;
+            var username = node.username || msg.username;
+            var auth = node.auth;
+            var authprot = node.authprot;
+            var privprot = node.privprot;
+            var authkey = node.authkey || msg.authkey;
+            var privkey = node.privkey || msg.privkey;
             var oids = node.oids || msg.oid;
+            var sessionid = Date.now();
+            var data = {};
+            data.community = community;
+            data.name = username;
+            data.auth = auth;
+            data.authprot = authprot;
+            data.privprot = privprot;
+            data.authkey = authkey;
+            data.privkey = privkey;
+            data.sessionid = sessionid;
+            var options = {};
+            options.version = version;
+            options.timeout = node.timeout;
             if (oids) {
                 msg.oid = oids;
-                getSession(host, community, node.version, node.timeout).subtree(msg.oid, maxRepetitions, feedCb, function (error) {
+                openSession(host, data, options).subtree(msg.oid, maxRepetitions, feedCb, function (error) {
                     if (error) {
                         node.error(error.toString(), msg);
                     }
@@ -200,6 +339,7 @@ module.exports = function (RED) {
                         //Clears response
                         response.length = 0;
                     }
+                    closeSession(sessionid);
                 });
             }
             else {
@@ -214,7 +354,13 @@ module.exports = function (RED) {
         RED.nodes.createNode(this, n);
         this.community = n.community;
         this.host = n.host;
-        this.version = (n.version === "2c") ? snmp.Version2c : snmp.Version1;
+        this.version = n.version;
+        this.username = n.username;
+        this.auth = n.auth;
+        this.authprot = n.authprot;
+        this.privprot = n.privprot;
+        this.authkey = n.authkey;
+        this.privkey = n.privkey;
         this.oids = n.oids.replace(/\s/g, "");
         this.timeout = Number(n.timeout || 5) * 1000;
         var node = this;
@@ -235,12 +381,32 @@ module.exports = function (RED) {
 
         this.on("input", function (msg) {
             node.msg = msg;
-            var oids = node.oids || msg.oid;
             var host = node.host || msg.host;
+            var version = node.version;
             var community = node.community || msg.community;
+            var username = node.username || msg.username;
+            var auth = node.auth;
+            var authprot = node.authprot;
+            var privprot = node.privprot;
+            var authkey = node.authkey || msg.authkey;
+            var privkey = node.privkey || msg.privkey;
+            var oids = node.oids || msg.oid;
+            var sessionid = Date.now();
+            var data = {};
+            data.community = community;
+            data.name = username;
+            data.auth = auth;
+            data.authprot = authprot;
+            data.privprot = privprot;
+            data.authkey = authkey;
+            data.privkey = privkey;
+            data.sessionid = sessionid;
+            var options = {};
+            options.version = version;
+            options.timeout = node.timeout;
             if (oids) {
                 msg.oid = oids;
-                getSession(host, community, node.version, node.timeout).walk(msg.oid, maxRepetitions, feedCb, function (error) {
+                openSession(host, data, options).walk(msg.oid, maxRepetitions, feedCb, function (error) {
                     if (error) {
                         node.error(error.toString(), msg);
                     }
@@ -251,6 +417,7 @@ module.exports = function (RED) {
                         //Clears response
                         response.length = 0;
                     }
+                    closeSession(sessionid);
                 });
             }
             else {