scrypt: update recommended parameters for 2017

Previously we documented recommended parameters for scrypt from 2009,
which was eight years ago. Update those parameters and also provide
some guidance to users for configuring those settings in 2017. On my
late 2015 Macbook Pro, the scrypt benchmark with N=1<<15, r=8, p=1
completes in 91 milliseconds.

Add an Example with a salt.

Fixes golang/go#22082.

Change-Id: I23e3920db67583c9fce093768a32e67ab9c979f5
Reviewed-on: https://go-review.googlesource.com/67070
Reviewed-by: Adam Langley <agl@golang.org>
3 files changed
tree: 00c187a0079da2435d14111d273a7a91a5b55377
  1. acme/
  2. bcrypt/
  3. blake2b/
  4. blake2s/
  5. blowfish/
  6. bn256/
  7. cast5/
  8. chacha20poly1305/
  9. cryptobyte/
  10. curve25519/
  11. ed25519/
  12. hkdf/
  13. md4/
  14. nacl/
  15. ocsp/
  16. openpgp/
  17. otr/
  18. pbkdf2/
  19. pkcs12/
  20. poly1305/
  21. ripemd160/
  22. salsa20/
  23. scrypt/
  24. sha3/
  25. ssh/
  26. tea/
  27. twofish/
  28. xtea/
  29. xts/
  30. .gitattributes
  31. .gitignore
  32. AUTHORS
  33. codereview.cfg
  34. CONTRIBUTING.md
  35. CONTRIBUTORS
  36. LICENSE
  37. PATENTS
  38. README.md
README.md

Go Cryptography

This repository holds supplementary Go cryptography libraries.

Download/Install

The easiest way to install is to run go get -u golang.org/x/crypto/.... You can also manually git clone the repository to $GOPATH/src/golang.org/x/crypto.

Report Issues / Send Patches

This repository uses Gerrit for code changes. To learn how to submit changes to this repository, see https://golang.org/doc/contribute.html.

The main issue tracker for the crypto repository is located at https://github.com/golang/go/issues. Prefix your issue with “x/crypto:” in the subject line, so it is easy to find.

Note that contributions to the cryptography package receive additional scrutiny due to their sensitive nature. Patches may take longer than normal to receive feedback.