To use: mount a .zip file as usual, open a file as usual, but append '$' plus
the password to the end of the path, like so:
PHYSFS_File *f = PHYSFS_openRead("/path/to/my/file.txt$MyPassword");
Note that this is the "traditional" PKWARE crypto, like you might get from
PkZip 2.04g or Info-ZIP. They have more advanced cryptography in the modern
.zip spec, but that's not implemented here. If you've ever tried to unzip
an archive and were prompted for a password, you probably saw the traditional
crypto at work.
Note that this is NOT a secure thing: if you ship an app that contains a
password, someone with a debugger can retrieve it. Note also that this
password could be available to any code registered as a PHYSFS_Archiver, and
that due to how archives combine into a single file tree, the wrong archiver
can get the password, at a minimum causing it to fail because passwords don't
match.
In short: make sure you know what you're doing before you use this!
We now use a hashtable for lookups of specific paths, and organize the
entries into a directory tree. The end result is fast lookup and fast
enumeration without having to search a sorted array or tapdance with
substrings...which means the rare, mysterious bug where we failed
to find an existing file should be gone now, too.
This lets an application supply its own archivers, where they will work like
any built-in archiver. This allows abstract directory interfaces the same
way that PHYSFS_Io allows stream implementations.
This is a work in progress still. The API is still changing, and will remain
at version 0 until it is finalized (a theoretical future version 1 will be
for when the final public interface changes, not when we evolve the initial
API design).
This would become a bogus check with zip64 support anyhow, but even here, if
you have a .zip that's close to 4 gigabytes, and a self-extracting program
prepended to it that pushes it over that limit, this test fails
incorrectly.
Ryan C. Gordon
Francesco Bertolaccini
David Yip