feat(new-tool): generate ula based on timestamp and mac address (#344)

* feat(ipv6-ula-generator): new tool: generate ula based on timestamp and mac address

This new tool generates a random unique ula based on the current timestamp and the provided mac address. An ULA is your "secondary" IPV6-Address only for internal use.
It can also be used as a backup address if your provider gets offline and your Prefix-IPs are not longer valid.Also you can create the most of your internal firewall rules based on your ULAs.

* feat(ipv6-ula-generator): changes requested by review

* Update src/tools/ipv6-ula-generator/index.ts

* Update src/tools/ipv6-ula-generator/ipv6-ula-generator.vue

---------

Co-authored-by: Corentin THOMASSET <corentin.thomasset74@gmail.com>

src/tools/ipv6-ula-generator/ipv6-ula-generator.vue

@@ -0,0 +1,64 @@
+<template>
+  <div>
+    <n-space vertical :size="50">
+      <n-alert title="Info" type="info">
+        This page uses the first method suggested by IETF using the current timestamp plus the mac address, sha1 hashed,
+        and the lower 40 bits to generate your random ULA.
+      </n-alert>
+
+      <n-form-item label="MAC address:" v-bind="validationAttrs">
+        <n-input
+          v-model:value="macAddress"
+          size="large"
+          placeholder="Type a MAC address"
+          clearable
+          autocomplete="off"
+          autocorrect="off"
+          autocapitalize="off"
+          spellcheck="false"
+        />
+      </n-form-item>
+    </n-space>
+
+    <div v-if="validationAttrs.validationStatus !== 'error'">
+      <n-input-group v-for="{ label, value } in calculatedSections" :key="label" style="margin: 5px 0">
+        <n-input-group-label style="flex: 0 0 160px"> {{ label }} </n-input-group-label>
+        <input-copyable :value="value" readonly />
+      </n-input-group>
+    </div>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { SHA1 } from 'crypto-js';
+import InputCopyable from '@/components/InputCopyable.vue';
+import { macAddressValidation } from '@/utils/macAddress';
+
+const macAddress = ref('20:37:06:12:34:56');
+const calculatedSections = computed(() => {
+  const timestamp = new Date().getTime();
+  const hex40bit = SHA1(timestamp + macAddress.value)
+    .toString()
+    .substring(30);
+  const ula = 'fd' + hex40bit.substring(0, 2) + ':' + hex40bit.substring(2, 6) + ':' + hex40bit.substring(6);
+
+  return [
+    {
+      label: 'IPv6 ULA : ',
+      value: `${ula}::/48`,
+    },
+    {
+      label: 'First routable block: ',
+      value: `${ula}:0::/64`,
+    },
+    {
+      label: 'Last routable block: ',
+      value: `${ula}:ffff::/64`,
+    },
+  ];
+});
+
+const { attrs: validationAttrs } = macAddressValidation(macAddress);
+</script>
+
+<style lang="less" scoped></style>