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csrf-demo's Introduction

CSRF防御demo

nodejs端防御规则

  • step1，判别是否post，否的话无需防御
  • step2，判别是否当前url属于白名单：是则无需防御
  • step3，获取cookie ppu：如果未获取，则认为无需防御
  • step4，ppu存在：获取 http header x-csrf-token
  • step5，判断x-csrf-token与ppu是否相同：是则认为通过校验，否则拒绝服务

browser端请求规则

  • step1，POST请求时，添加header x-csrf-token，值为PPU cookie
  • step2，cookie无PPU时，x-csrf-token可以为空，或者null；或者干脆不设置x-csrf-token

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