AES加密/解密报错，Input length must be multiple of 16 when decrypting with padded cipher

程序员文章站 2022-07-10 15:25:26

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背景：需要存储一个类似**的字符串，密文存储，并要求能逆向解密出来。

问题描述：使用AES对该字符串进行加密后生成byte数组，使用new String()方法转为字符串后存储到数据库。

从数据库中取出密文，使用getBytes()方法转换为byte数组，然后解密，此时报如下错误：

javax.crypto.IllegalBlockSizeException: Input length must be multiple of 16 when decrypting with padded cipher
    at com.sun.crypto.provider.CipherCore.doFinal(CipherCore.java:922)
    at com.sun.crypto.provider.CipherCore.doFinal(CipherCore.java:833)
    at com.sun.crypto.provider.AESCipher.engineDoFinal(AESCipher.java:446)
    at javax.crypto.Cipher.doFinal(Cipher.java:2165)

解决思路：AES加密-->base64编码->密文

密文-->base64解码->AES解密

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