问题描述
我在 servlet 上使用 jjwt Java 库在服务器端生成 jwt,下面的代码截图直接来自 jjwt GitHub 页面 https://github.com/jwtk/jjwt 生成并打印出这个令牌.
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,当我尝试在 jwt.io 的调试器上验证此令牌时,签名检查失败.检查和取消检查秘密 base64 编码都不起作用
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
我是否错误地使用了库?
Am I using the library wrongly?
推荐答案
尝试使用 secr
并检查 base64 选项:)
Try with secr
and check the base64 option :)
这是由于 .signWith(SignatureAlgorithm.HS256, "secret")
造成的.它由 DefaultJwtBuilder 实现 类
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 密钥,并且 secret
不是 base64.当方法从 base64
解码到 byte[]
时,jjwt 使用的 java 转换器提供字符串 secr
这与 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
你可以自己测试
System.out.println(
javax.xml.bind.DatatypeConverter.printBase64Binary(
javax.xml.bind.DatatypeConverter.parseBase64Binary("secret")));
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