java.lang.IllegalArgumentException: Base64-encoded key bytes may only be specified for HMAC

合集 - 报错(63)

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8.java.lang.IllegalArgumentException: Base64-encoded key bytes may only be specified for HMAC2023-12-28

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收起

一、遇到的问题

java.lang.IllegalArgumentException: Base64-encoded key bytes may only be specified for HMAC signatures.  If using RSA or Elliptic Curve, use the signWith(SignatureAlgorithm, Key) method instead.

原因：

这个异常通常表示在使用Java的JWT（JSON Web
Token）库时，使用了不支持的签名算法（SignatureAlgorithm）或者在使用HS（HMAC）算法时，尝试提供了Base64编码的密钥字节。解决这个问题的方法是确保你在使用HS算法时，提供的密钥是原始的字节数组，而不是Base64编码的字符串。

二、解决方法

比如这里用到的是 HS256 需要保持一致。

JwtUtil util = new JwtUtil("nxg", SignatureAlgorithm.HS256);