-----BEGIN RSA PUBLIC KEY-----MIIBCgKCAQEAsVvQFsRLVuf72lX2EGVva2v5L2uTFHzWbb4Nd6Bx6OvS+men3r/6d/xC4VVG0uuFfk750jNSBOTa3qLeVuXQEUDdjipfWDr1hhliceJEoYCGLAiuPPdSJDodxqgLPeFf6E6Ej/o4qIvya5lm7H5CVMAmuU7aeUa8xts1S1QkuXI3+4md7yb0MNVoJlgTuSlDSFOZ4kQdlelmw1MCLjLth+RkMvhNaSCInrlyRW52pBdju2Oy/6jMvgWa2g4Z3pmb5jZKndUHbXOdCDtq+6etW1wmGXw7MIk56gH1fgDPNhp11dUwJTZxueiCMPKMxT3WysDVvXuPx47HbAA00Ud7FQIDAQAB
-----END RSA PUBLIC KEY-----
https://pay.weixin.qq.com/wiki/doc/api/tools/mch_pay.php?chapter=24_7&index=4,麻烦参考这篇文档。