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test-repo/docs/.vitepress/theme/components/appendix/auth-design/CSRFDefenseDemo.vue
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<!--
CSRFDefenseDemo.vue
CSRF 防护手动推进 + 怎么做清单
-->
<template>
<div class="csrf-demo">
<div class="header">
<div class="title">🛡 CSRF为什么自动带 Cookie会出事</div>
<div class="subtitle">
手动推进一个最小攻击链再看 3 个最常用防护手段SameSite / CSRF Token /
双重提交
</div>
</div>
<div class="controls">
<button class="btn primary" @click="start" :disabled="step !== 0">
开始
</button>
<button class="btn" @click="prev" :disabled="step <= 1">上一步</button>
<button
class="btn primary"
@click="next"
:disabled="step === 0 || step >= maxStep"
>
下一步
</button>
<button class="btn" @click="reset">重置</button>
</div>
<div v-if="step > 0" class="progress">
Step {{ step }} / {{ maxStep }} · {{ steps[step - 1]?.title }}
</div>
<div class="grid">
<div class="card">
<div class="card-title">场景</div>
<div class="desc">
假设你登录了 <strong>bank.com</strong>Cookie
已存在你又打开了一个恶意网站
<strong>evil.com</strong>它偷偷发起转账请求
</div>
<div class="box">
<div class="box-title">你的 Cookie浏览器会自动带</div>
<code class="mono">Cookie: session_id=abc123</code>
</div>
</div>
<div class="card">
<div class="card-title">本步请求</div>
<pre class="code"><code>{{ requestText }}</code></pre>
<div class="desc">{{ steps[step - 1]?.desc }}</div>
</div>
</div>
<div class="card">
<div class="card-title">防护怎么选优先顺序</div>
<ol class="list">
<li>
<strong>SameSite Cookie</strong
>对大多数跨站表单/图片请求非常有效Lax/Strict
</li>
<li>
<strong>CSRF Token</strong>在表单/请求头里带
token服务端校验对复杂场景最稳
</li>
<li>
<strong>双重提交 Cookie</strong>Cookie + Header 同时带
token服务端比较一致性
</li>
</ol>
<div class="warn">
<div class="warn-title">注意</div>
<div class="warn-text">
CSRF 主要针对Cookie 自动携带的场景若你用 Authorization:
Bearer不自动发送CSRF 风险会显著降低但仍要考虑 XSS/Token
泄露等问题
</div>
</div>
</div>
</div>
</template>
<script setup>
import { computed, ref } from 'vue'
const maxStep = 4
const step = ref(0)
const steps = [
{
title: '1) 恶意站点发起跨站请求',
desc: 'evil.com 诱导你点击按钮/加载图片/提交表单,目标是 bank.com 的转账接口。'
},
{
title: '2) 浏览器自动带上 bank.com 的 Cookie',
desc: '关键点:Cookie 是“按域名自动携带”的,evil.com 不需要知道你的 session_id。'
},
{
title: '3) 服务端如果只靠 Cookie 识别用户,会误以为是你本人操作',
desc: '如果 bank.com 没做 CSRF 防护,转账可能被执行。'
},
{
title: '4) 加上 CSRF 防护后,请求会被拒绝',
desc: 'SameSite/CSRF Token 等会阻断这类跨站伪造请求。'
}
]
const requestText = computed(() => {
if (step.value === 0) return '(点击开始)'
if (step.value === 1) {
return `POST https://bank.com/api/transfer
Origin: https://evil.com
Content-Type: application/x-www-form-urlencoded
to=attacker&amount=1000`
}
if (step.value === 2) {
return `POST /api/transfer
Origin: https://evil.com
Cookie: session_id=abc123
to=attacker&amount=1000`
}
if (step.value === 3) {
return `(如果服务端只校验 Cookie:可能返回 200 OK 并执行转账)`
}
return `POST /api/transfer
Origin: https://evil.com
Cookie: session_id=abc123
X-CSRF-Token: <missing or invalid>
→ 403 Forbidden`
})
const start = () => {
step.value = 1
}
const next = () => {
step.value = Math.min(maxStep, step.value + 1)
}
const prev = () => {
step.value = Math.max(1, step.value - 1)
}
const reset = () => {
step.value = 0
}
</script>
<style scoped>
.csrf-demo {
border: 1px solid var(--vp-c-divider);
background: var(--vp-c-bg-soft);
border-radius: 6px;
padding: 1.5rem;
margin: 0.5rem 0;
}
.header {
margin-bottom: 1rem;
}
.title {
font-weight: 800;
color: var(--vp-c-text-1);
}
.subtitle {
margin-top: 0.25rem;
color: var(--vp-c-text-2);
font-size: 0.9rem;
}
.controls {
display: flex;
gap: 0.5rem;
flex-wrap: wrap;
margin-bottom: 0.75rem;
}
.btn {
padding: 0.5rem 0.75rem;
border-radius: 6px;
border: 1px solid var(--vp-c-divider);
background: var(--vp-c-bg);
color: var(--vp-c-text-1);
cursor: pointer;
font-weight: 700;
font-size: 0.875rem;
}
.btn.primary {
background: var(--vp-c-brand);
border-color: var(--vp-c-brand);
color: var(--vp-c-bg);
}
.btn:disabled {
opacity: 0.5;
cursor: not-allowed;
}
.progress {
color: var(--vp-c-text-2);
font-size: 0.9rem;
margin-bottom: 0.75rem;
}
.grid {
display: grid;
grid-template-columns: 1fr 1fr;
gap: 1rem;
margin-bottom: 1rem;
}
.card {
background: var(--vp-c-bg);
border: 1px solid var(--vp-c-divider);
border-radius: 6px;
padding: 0.75rem;
}
.card-title {
font-weight: 800;
margin-bottom: 0.75rem;
color: var(--vp-c-text-1);
}
.desc {
color: var(--vp-c-text-2);
line-height: 1.75;
}
.box {
margin-top: 0.75rem;
border: 1px solid var(--vp-c-divider);
background: var(--vp-c-bg-alt);
border-radius: 6px;
padding: 0.75rem;
}
.box-title {
font-weight: 800;
margin-bottom: 0.35rem;
color: var(--vp-c-text-1);
}
.mono {
font-family: var(--vp-font-family-mono);
}
.code {
margin: 0;
padding: 0.75rem;
border-radius: 6px;
background: var(--vp-c-bg-alt);
border: 1px solid var(--vp-c-divider);
overflow-x: auto;
color: var(--vp-c-text-1);
}
.list {
margin: 0;
padding-left: 1.2rem;
color: var(--vp-c-text-2);
line-height: 1.75;
}
.warn {
margin-top: 0.75rem;
border: 1px solid rgba(var(--vp-c-brand-rgb), 0.18);
background: rgba(var(--vp-c-brand-rgb), 0.06);
border-radius: 6px;
padding: 0.75rem;
}
.warn-title {
font-weight: 800;
color: var(--vp-c-text-1);
margin-bottom: 0.25rem;
}
.warn-text {
color: var(--vp-c-text-2);
line-height: 1.7;
}
@media (max-width: 720px) {
.grid {
grid-template-columns: 1fr;
}
}
</style>