There is no need to unlock keyslot if the provided name
has wrong format. Let's check for length and '/' in name early.
Note that other commands could accept path to the device
as libdevmapper translate it to the name (status /dev/mapper/xxx).
Add early check only to activate commands.
It still can fail later because of mangled characters.
Fixes: #893
This patch switches code to SPDX one-line license identifiers according to
https://spdx.dev/learn/handling-license-info/
and replacing long license text headers.
I used C++ format on the first line in style
// SPDX-License-Identifier: <id>
except exported libcryptsetup.h, when only C comments are used.
The only additional changes are:
- switch backend utf8.c from LGPL2+ to LGPL2.1+ (as in systemd)
- add some additional formatting lines.
This should silence similar warnings like
warning: cast from 'char *' to 'struct xyz *' increases required alignment from 1 to X
when we try to calclulate byte pointer offsets in a buffer.
