https://developers.weixin.qq.com/doc/oplatform/Third-party_Platforms/Message_Encryption/Message_encryption_and_decryption.html

java.security.InvalidKeyException: Illegal key size

at javax.crypto.Cipher.checkCryptoPerm(Cipher.java:1024)

at javax.crypto.Cipher.implInit(Cipher.java:790)

at javax.crypto.Cipher.chooseProvider(Cipher.java:849)

at javax.crypto.Cipher.init(Cipher.java:1348)

at javax.crypto.Cipher.init(Cipher.java:1282)