NaCl (software)

NaCl (pronounced "salt") is an abbreviation for "Networking and Cryptography library", a public domain "...high-speed software library for network communication, encryption, decryption, signatures, etc".[2]

Not to be confused with Google Native Client.
This article is about the cryptography library. For the configuration management software, see Salt (software).
NaCl
Original author(s)Daniel J. Bernstein, Tanja Lange, Peter Schwabe
Initial release2008 (2008)
Stable release
20110221 / February 21, 2011 (2011-02-21)
Operating systemUNIX-like
Licensepublic domain[1]
Websitenacl.cr.yp.to

NaCl was created by the mathematician and programmer Daniel J. Bernstein who is best known for the creation of qmail and Curve25519. The core team also includes Tanja Lange[3] and Peter Schwabe.[4] The main goal while creating NaCl, according to the paper, was to "avoid various types of cryptographic disasters suffered by previous cryptographic libraries".[1]

Basic functions

Public-key cryptography

Secret-key cryptography

Low-level functions
  • String comparison.[7]

Key derivation function (only libsodium)

Implementations

Reference implementation is written in C, often with several inline assembler. C++ and Python are handled as wrappers.[8]

NaCl has a variety of programming language bindings such as PHP,[9] and forms the basis for Libsodium, a cross-platform cryptography library created in 2013 which is API compatible with NaCl.

Alternative implementations
  • Libsodium — a portable, cross-compilable, installable, packageable, API-compatible version of NaCl.[10]
  • NaCl Pharo — a Pharo Smalltalk Extension.[11]
  • TweetNaCl — a tiny C library, which fits in just 100 tweets (140 symbols each), but supports all NaCl functions.[12]
  • NaCl for Tcl — a port to the Tcl language.[13]
  • NaCl for JavaScript — a port of TweetNaCl/NaCl cryptographic library to the JavaScript language.[14]
  • TweetNaCl for Java — a port of TweetNaCl/NaCl cryptographic library to the Java language.[15]
  • SPARKNaCl — A re-write of TweetNaCl in the SPARK Ada subset, with formal and fully automatic proofs of type safety and some correctness properties.[16]
  • Crypt::NaCl::Sodium Perl 5 binding to libsodium[17]

See also

References
  1. https://cr.yp.to/highspeed/coolnacl-20120725.pdf Archived 2017-08-09 at the Wayback Machine "The security impact of a new cryptographic library" Daniel J. Bernstein, Tanja Lange, Peter Schwabe
  2. "NaCl: Networking and Cryptography library".
  3. "Tanja Lange's Homepage".
  4. "Peter Schwabe's Homepage".
  5. "Hashing". 2010-08-30. Retrieved 2015-11-14.
  6. "Generic hashing". 2017-12-13. Retrieved 2018-05-19.
  7. Bernstein, Daniel J. (10 March 2009). Cryptography in NaCl (PDF). Archived from the original (PDF) on 25 March 2017. Retrieved 8 February 2016.
  8. "NaCl Internals".
  9. "NaCl PHP Extension". Github. 2019-06-14.
  10. "Libsodium".
  11. "SmalltalkHub repository".
  12. "TweetNaCl".
  13. "Tclers Wiki - NaCl for Tcl".
  14. "TweetNaCl".
  15. "TweetNaCl-Java".
  16. "SPARKNaCl".
  17. "Crypt::NaCl::Sodium".
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