問題描述

我在 servlet 上使用 jjwt Java 庫在服務(wù)器端生成 jwt，下面的代碼截圖直接來自 jjwt GitHub 頁面 https://github.com/jwtk/jjwt 生成并打印出這個令牌.

I am using the jjwt Java library for server side generation of jwt in on servlets, the code snipper below straight from the jjwt GitHub page https://github.com/jwtk/jjwt generates and prints out this token.

eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOiJKb2UifQ.XIKER3owR8BS3Krhsksg9INh9VBSejdn_qN-ONtPans

 String compactJws = Jwts.builder()
      .setSubject("Joe")
      .signWith(SignatureAlgorithm.HS256, "secret")
      .compact();
  PrintWriter out = response.getWriter();
  out.println(compactJws);

但是，當(dāng)我嘗試在 jwt.io 的調(diào)試器上驗證此令牌時，簽名檢查失敗.檢查和取消檢查秘密 base64 編碼都不起作用

However, when I try to verify this token on jwt.io's debugger, it fails the signature check. Both checking and unchecking secret base64 encoded didn't work

我是否錯誤地使用了庫?

Am I using the library wrongly?

推薦答案

嘗試使用 secr 并檢查 base64 選項:)

Try with secr and check the base64 option :)

這是由于 .signWith(SignatureAlgorithm.HS256, "secret") 造成的.它由 DefaultJwtBuilder 實現(xiàn) 類

It is due to .signWith(SignatureAlgorithm.HS256, "secret"). It is implemented by DefaultJwtBuilder class

public JwtBuilder signWith(SignatureAlgorithm alg, String base64EncodedSecretKey) 

此方法假定您提供的是 base64 密鑰，并且 secret 不是 base64.當(dāng)方法從 base64 解碼到 byte[] 時，jjwt 使用的 java 轉(zhuǎn)換器提供字符串 secr 這與 jwt.io

This method assumes that you are providing a key in base64 and secret is not base64. When the method decodes from base64 to byte[] the java converter used by jjwt provides a representation of the string secr which is different to the JavaScript decoder used at jwt.io

你可以自己測試

System.out.println(
                javax.xml.bind.DatatypeConverter.printBase64Binary(
                        javax.xml.bind.DatatypeConverter.parseBase64Binary("secret")));

這篇關(guān)于在 jwt.io 調(diào)試器中使用 Java JJWT 簽名生成失敗的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網(wǎng)！