[PATCH backup v2 0/3] fix #7054: client: remove trailing newlines from credentials

[Maximiliano Sandoval <m.sandoval@proxmox.com>]

See the first commit for more details.

This was tested with proxmox-backup-client making a login/backup using different
credentials with and without newlines. The commands were similar to the
systemd-run commands at the Backup Client Usage docs.

I did not find a way to create the keyfile with newlines in its password using
proxmox-backup-client since it reads from the tty stdin, but surely it could be
created manually. Perhaps it is safe-ish to also remove trailing control
characters from the encryption password but this seems a safer approach for now.

Diferences from v1:
 - Always do an extra allocation to keep the code clean
 - Rename password to blob
 - Only strip newlines on passwords

Maximiliano Sandoval (3):
  fix #7054: client: remove trailing newlines from credentials
  docs: client: document further password constrains
  client: rename password to blob

 docs/backup-client.rst      |  7 ++++---
 pbs-client/src/tools/mod.rs | 14 ++++++++++++--
 2 files changed, 16 insertions(+), 5 deletions(-)

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2.47.3