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When using:

  mysql -u user -p

MariaDB / MySQL server will ask for the password.

If the string provided is longer that 79 characters, the server will always return an ERROR:

  # mysql -u user -p
  Enter password: 
  ERROR 1045 (28000): Access denied for user 'user'@'localhost' (using password: YES)

--

Reproducible on both MariaDB, MySQL in RHEL, RHSCL and Fedora.

Reproducer:


CREATE USER 'user'@'localhost';
SET PASSWORD FOR 'user'@'localhost' = PASSWORD('1111111111111111111111111111111111111111111111111122222222222222222222222221234');

mysql -u user -p


SET PASSWORD FOR 'user'@'localhost' = PASSWORD('11111111111111111111111111111111111111111111111111222222222222222222222222212345');

mysql -u user -p

Expected:
The array for the password is capped to 80 chars.

https://github.com/MariaDB/server/blob/10.3/mysys/get_password.c#L63

Before I get caught out by providing a link to the windows code section,
linux has the same limit: https://github.com/MariaDB/server/blob/10.3/mysys/get_password.c#L155

The lack of a meaningful error message is a bit ugly.