scrypt 1.2.1 released

[Colin Percival <cperciva@tarsnap.com>]

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Hi scrypt users,

I've just released scrypt 1.2.1.  You can download the scrypt code at
  http://www.tarsnap.com/scrypt/scrypt-1.2.1.tgz
and the tarball has SHA256 hash
  4621f5e7da2f802e20850436219370092e9fcda93bd598f6d4236cce33f4c577
which can also be found in the GPG-signed hash file at
  http://www.tarsnap.com/scrypt/scrypt-sigs-1.2.1.asc
.  I've also tagged the source tree from which I rolled this release at
https://github.com/Tarsnap/scrypt/tree/1.2.1 .

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.

- -- 
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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