feat(contrib): add snmp2cpe (#1625)

contrib/snmp2cpe/README.md

@@ -0,0 +1,50 @@
+# snmp2cpe
+
+## Main Features
+
+- Estimate hardware and OS CPE from SNMP reply of network devices
+
+## Installation
+
+```console
+$ git clone https://github.com/future-architect/vuls.git
+$ make build-snmp2cpe
+```
+
+## Command Reference
+
+```console
+$ snmp2cpe help
+snmp2cpe: SNMP reply To CPE
+
+Usage:
+  snmp2cpe [command]
+
+Available Commands:
+  completion  Generate the autocompletion script for the specified shell
+  convert     snmpget reply to CPE
+  help        Help about any command
+  v1          snmpget with SNMPv1
+  v2c         snmpget with SNMPv2c
+  v3          snmpget with SNMPv3
+  version     Print the version
+
+Flags:
+  -h, --help   help for snmp2cpe
+
+Use "snmp2cpe [command] --help" for more information about a command.
+```
+
+## Usage
+
+```console
+$ snmp2cpe v2c --debug 192.168.1.99 public
+2023/03/28 14:16:54 DEBUG: .1.3.6.1.2.1.1.1.0 -> 
+2023/03/28 14:16:54 DEBUG: .1.3.6.1.2.1.47.1.1.1.1.12.1 -> Fortinet
+2023/03/28 14:16:54 DEBUG: .1.3.6.1.2.1.47.1.1.1.1.7.1 -> FGT_50E
+2023/03/28 14:16:54 DEBUG: .1.3.6.1.2.1.47.1.1.1.1.10.1 -> FortiGate-50E v5.4.6,build1165b1165,171018 (GA)
+{"192.168.1.99":{"entPhysicalTables":{"1":{"entPhysicalMfgName":"Fortinet","entPhysicalName":"FGT_50E","entPhysicalSoftwareRev":"FortiGate-50E v5.4.6,build1165b1165,171018 (GA)"}}}}
+
+$ snmp2cpe v2c 192.168.1.99 public | snmp2cpe convert
+{"192.168.1.99":["cpe:2.3:h:fortinet:fortigate-50e:-:*:*:*:*:*:*:*","cpe:2.3:o:fortinet:fortios:5.4.6:*:*:*:*:*:*:*"]}
+```