Gates ML-DSA composites behind WOLFSSH_NO_MLDSA_COMPOSITES.
Deduplicates key handling and uses heap allocation for
composite buffers when compiling for small stacks.
QNX system images fix the host key's owner and modes, and the daemon cannot
change either, so the secure gate refuses to load a key the integrator has no
way to correct. Add a hand-defined WOLFSSH_NO_HOSTKEY_PERMS, further
conditional on QNX, that hands only that policy to the platform.
- Fold the macro and the QNX test into the internal
WOLFSSHD_HOSTKEY_RELAX_PERMS in wolfsshd.c.
- Add a relaxPerms argument to wolfSSHD_OpenSecureFile() that skips the owner,
mode and ancestor-directory checks.
- Keep the structural checks: lstat, O_NOFOLLOW, S_ISREG and the dev/ino
recheck, so a symlink, a non-regular file or a swap during the open is still
refused.
- Set it only on the host key load, leaving the host cert, UserCAKeysFile,
authorized_keys and shadow gates unchanged.
- Log at startup when the guard is built in.
- Add six test_OpenSecureFile scenarios for the relaxed path, unreachable at
runtime off QNX and so otherwise uncovered.
Issue: ZD-22308
Emma Stensland
John Safranek
Paul Adelsbach