AES256GCM, Base64 decod of key file failed...

[mingcz0301]

Created under windows but key.b64 does not add 0A at the end of the line. The key.b64 file created under macos linux will add 0A at the end, causing base64 decoding to fail.
Unless you use Vim to manually delete 0A, it won't work properly. Even using echo "base64" > key.b64 still has 0A.
Especially when changing keys in stages, it becomes very troublesome
Dear developers, can you use string trim after reading the key.b64 file content to increase compatibility?