F-8824: enable config files without trailing newline

[padelsbach]

No description provided.

[Copilot]

Pull request overview

Enables known_hosts parsing to handle files whose last line does not end with a trailing newline, and adds regression coverage to prevent reintroducing the issue.

Changes:

• Make load_der_file() allocate an extra byte and NUL-terminate the buffer past the file contents.
• Update ClientPublicKeyCheck() parsing to avoid clobbering the last byte and to normalize CRLF line endings.
• Add a regression test that exercises last-entry matching with \n, no trailing newline, and \r\n.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
apps/wolfssh/common.c	NUL-terminate loaded file buffers and normalize CRLF in known_hosts parsing.
tests/regress.c	Add regression test for known_hosts last-line handling (with/without trailing newline and CRLF).

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[wolfSSL-Fenrir-bot]

Fenrir Automated Review — PR #1156

Scan targets checked: wolfssh-bugs, wolfssh-src

Findings: 5
5 finding(s) posted as inline comments (see file-level comments below)

This review was generated automatically by Fenrir. Findings are non-blocking.

[wolfSSL-Fenrir-bot]

Fenrir Automated Review — PR #1156

Scan targets checked: wolfssh-bugs, wolfssh-src

Findings: 5
5 finding(s) posted as inline comments (see file-level comments below)

This review was generated automatically by Fenrir. Findings are non-blocking.

[ejohnstown]

The issue described by F-8824 was already fixed upstream. This fixes the write side of the known_hosts file, and adds testing.