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Please test: scrypt 1.2.99

Hash: SHA1

Hi scrypt users and tarsnap alphatesters,

I've just uploaded a tarball which may be (modulo version number update)
release 1.3.0 of my scrypt file encryption utility.  There have been a
non-trivial number of changes in the build code since scrypt 1.2.1, so
I'm hoping you guys can test this and make sure we haven't broken anything.

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
and the tarball has SHA256 hash
.  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 functional changes since 1.2.1:
* In addition to the scrypt command-line utility, a library "libscrypt-kdf"
  can now be built and installed by passing the --enable-libscrypt-kdf option
  to configure.
* On x86 CPUs which support them, RDRAND and SHA extensions are used to
  provide supplemental entropy and speed up hash computations respectively.

There are also a variety of less visible changes: Minor bug and compiler
warning fixes, improvements to the test suite, and some minor corrections
to source code comments.

Assuming nobody yells (or the yells are things I can fix quickly and easily)
I'll roll the official scrypt 1.3.0 release some time in the second half of

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