Fails to correctly encode "aswf!@#$%^&*()"

[BafDyce]

base64_url::encode("aswf!@#$%^&*()")

returns "YXN3ZiFAIyQlXiYqKCk"

Attempting to decode this with Linux' base64 binary fails:

$ echo "YXN3ZiFAIyQlXiYqKCk" | base64 -d
aswf!@#$%^&*()base64: invalid input

This is the correct base64 encoding (trailing '='!):

$ echo -n 'aswf!@#$%^&*()' | base64
YXN3ZiFAIyQlXiYqKCk=

The base64-crate correctly encodes the string, so I don't know where base64_url goes wrong.

[magiclen]

Do you know the difference between Base64-standard and Base64-url?

See https://tools.ietf.org/html/rfc4648#section-5

[BafDyce]

Oh, sorry. I was not aware that the trailing padding can be optional in base64-url.