TweetNaCl is a compact reimplementation of the NaCl library by Daniel J. Bernstein, Bernard van Gastel, Wesley Janssen, Tanja Lange, Peter Schwabe and Sjaak Smetsers. The library is less than 20 KB in size and provides 25 of the NaCl library functions.
The compact library uses curve25519, XSalsa20, Poly1305 and SHA-512 as default primitives, and includes both x25519 key exchange and ed25519 signatures. The complete list of functions can be found in TweetNaCl: A crypto library in 100 tweets (20140917), Table 1, page 5.
Crypto++ retained the function names and signatures but switched to data types provided by <stdint.h> to promote interoperability with Crypto++ and avoid size problems on platforms like Cygwin. For example, NaCl typdef'd u64 as an unsigned long long, but Cygwin, MinGW and MSYS are LP64 systems (not LLP64 systems). In addition, Crypto++ was missing NaCl's signed 64-bit integer i64.
Crypto++ enforces the 0-key restriction due to small points. The TweetNaCl library allowed the 0-keys to small points. Also see RFC 7748, Elliptic Curves for Security, Section 6.
TweetNaCl is well written but not well optimized. It runs 2x to 3x slower than optimized routines from libsodium. However, the library is still 2x to 4x faster than the algorithms NaCl was designed to replace.
The Crypto++ wrapper for TweetNaCl requires OS features. That is, NO_OS_DEPENDENCE cannot be defined. It is due to TweetNaCl's internal function randombytes. Crypto++ used DefaultAutoSeededRNG within randombytes, so OS integration must be enabled. You can use another generator like RDRAND to avoid the restriction.
CRYPTOPP_COVERAGE was added at 9614307ab7 to increase code coverage support. This commit enables additional validation routines when CRYPTOPP_COVERAGE is in effect.
This should have happened when we removed most of MAINTAIN_BACKWARDS_COMPATIBILITY artifacts. Its not practical move SHA1 into Weak:: namespace or "typedef SHA256 SHA" because SHA1 is too intertwined at the moment.
In the interim, maybe we can place SHA1 in both CryptoPP:: and Weak:: namespaces. This will allow us to transition into Weak::SHA1 over time, and signal to users SHA1 should be avoided.
regtest.cpp is where ciphers register by name. The library has added a number of ciphers over the last couple of years and the source file has experienced bloat. Most of the ARM and MIPS test borads were suffering Out of Memory (OOM) kills as the compiler processed the source fille and the included header files.
This won't stop the OOM kills, but it will help the situation. An early BeagleBoard with 512 MB of RAM is still going to have trouble, but it can be worked around by building with 1 make job as opposed to 2 or 4.
This is the reference implementation, test data and test vectors from the ARIA.zip package on the KISA website. The website is located at http://seed.kisa.or.kr/iwt/ko/bbs/EgovReferenceList.do?bbsId=BBSMSTR_000000000002.
We have optimized routines that improve Key Setup and Bulk Encryption performance, but they are not being checked-in at the moment. The ARIA team is updating its implementation for contemporary hardware and we would like to use it as a starting point before we wander too far away from the KISA implementation.
Move HTML header and footer into benchmark functions
Switch to <cmath> and standard math routines
Switch to <ctime> and standard clock and time routines
Move static variable^Cinto anonymous namespace
Add TimeToString function for printing start and end times
Also add missing validation functions to test.cpp. The test and functions were present, but only accessible with 'cryptest.ex v', where all the tests were run
This avoids a circular dependency between misc.h and trap.h. It also allows us to logically segregate and group code to replace C++ handlers, like set_terminate
trap.h and CRYPTOPP_ASSERT has existed for over a year in Master. We deferred on the cut-over waiting for a minor version bump (5.7). We have to use it now due to CVE-2016-7420
Jeffrey Walton