Please test: scrypt 1.2.1a

[Colin Percival <cperciva@tarsnap.com>]

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Hi scrypt users and tarsnap alphatesters,

I've just uploaded a tarball which may be (modulo version number update)
release 1.2.1 of my scrypt file encryption utility.  When I announced
scrypt 1.2.0a here 18 months ago it turned out that it was broken on pretty
much every platform except FreeBSD, so I'm hoping you guys can test this and
make sure I haven't repeated that.

I'm asking the tarsnap alphatest list to test scrypt too, because a lot of
the changes in scrypt will be in the next tarsnap release -- so think of this
as a head start on alphatesting the next version of tarsnap.  As always, bug
reports will receive bug bounties; no need to wait for the bug to appear in a
tarsnap release.

You can download the scrypt code at
  http://www.tarsnap.com/scrypt/scrypt-1.2.1a.tgz
and the tarball has SHA256 hash
  f3094ecb54860b26108d0203e2dbb677c9fb60e96063be0a16d945f43c31a04c
.  You can also see the tree from which I rolled this almost-release at
https://github.com/Tarsnap/scrypt if you find it useful to crawl through
VCS history.

Significant changes since 1.2.0:
* A new -v option instructs scrypt to print the key derivation parameters
it has selected.
* A new --version option prints the version number of the scrypt utility.
* A new -P option make scrypt read the passphrase from standard input; this
is designed for scripts which pipe a passphrase in from elsewhere.
* A new -f option makes 'scrypt dec' ignore the amount of memory or CPU time
it thinks decrypting a file will take, and proceed anyway; this may be useful
in cases where scrypt's estimation is wrong.
* The '-M maxmem' option now accepts "humanized" inputs, e.g., "-M 1GB".

There are also a variety of less visible changes: Performance improvements
in the SHA256 routines, minor bug and compiler warning fixes, the addition
of a test suite, and some minor code reorganization.

Assuming nobody yells (or the yells are things I can fix quickly and easily)
I'll roll the official scrypt 1.2.1 release a week from now.

- -- 
Colin Percival
Security Officer Emeritus, FreeBSD | The power to serve
Founder, Tarsnap | www.tarsnap.com | Online backups for the truly paranoid


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