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3.6.0

  • Remove bi-modal behavior of conditioning function
  • Make jent_read_entropy_safe safer by retrying the health test
  • Move the version information to make them available at compile time

3.5.0

  • add distinction between intermittent and permanent health failure

  • add compile time option to allow configuring a mask to reduce the size of the time stamp used for the APT

3.4.1

  • add FIPS 140 hints to man page
  • simplify the test tool to search for optimal configurations
  • fix: jent_loop_shuffle: re-add setting the time that was lost with 3.4.0
  • enhancement: add ARM64 assembler code to read high-res timer

3.4.0

  • enhancement: add API call jent_set_fips_failure_callback as requested by Daniel Ojalvo
  • fix: Change the SHA-3 integration: The entropy pool is now a SHA-3 state. It is filled with the time delta containing entropy and auxiliary data that does not contain entropy using a SHA update operation. The auxiliary data is calculated by a SHA-3 hashing of some varying state data. The time delta that contains entropy is measured about the SHA-3 hasing of the auxiliary data. This satisfies FIPS 140-3 IG D.K resolutions 4, 6, and 8.
  • enhancement: add CMake support by Andrew Hopkins

3.3.1

  • fix: bug fix in initialization logic by Vladis Dronov vdronov@redhat.com
  • fix: use asm instead of asm to suit the C11 standard

3.3.0

  • add jent_get_cachesize if _SC_LEVEL1_DCACHE_SIZE is not defined
  • limit the memory buffer size allocated and allow caller to provide the means to provide a limit, too
  • fix: update man page
  • update README explaining how to handle entropy shortfall to make it consistent with the current code base

3.2.0

  • fix: add API call jent_read_entropy_safe to header file
  • enhancement: add jent_entropy_init_ex API call
  • enhancement: call jent_entropy_init_ex automatically when jent_entropy_collector_alloc_internal detects that no self test has yet been performed
  • test: provide jitterentropy-rng test tool allowing all options exported by the library to be invoked
  • fix: re-add check of time_backwards in power-on test
  • fix: silence static code analysis tool
  • test: add test for GCD
  • enhancement: add GCD selftest
  • fix: simplify memory management for SHA-3
  • enhancement: add random memory access (JENT_RANDOM_MEMACCESS)

3.1.0

  • Add link call to pthreads library as suggested by Mikhail Novosyolov
  • Add ENTROPY_SAFETY_FACTOR to apply consideration of asymptotically reaching full entropy following SP800-90C suggested by Joshua Hill
  • Add test for finiding more entropy by changing the memory buffer size used for the memory access loop
  • Increase the memory buffer size to 512 kBytes per default based on measurements on systems with low entropy.
  • Add jent_ncpu() detecting the number of existing CPUs. Only when more than one CPU is in the system, the internal timer thread is started.
  • add GCD testing and analysis suggested by Joshua Hill
  • add fixes to APT suggested by Joshua Hill
  • add lag predictor health test suggested by Joshua Hill
  • add jent_read_entropy_safe API call
  • break up jitterentropy-base.c into various smaller code files

3.0.2

  • Small fixes suggested by Joshua Hill
  • Update the invocation of SHA-3 invocation: each loop iteration defined by the loop shuffle is a self-contained SHA-3 operation. Therefore, the conditioning information is always one SHA-3 operation with different time duration.
  • add JENT_CONF_DISABLE_LOOP_SHUFFLE config option allowing disabling of the shuffle operation
  • Use -O0

3.0.1

  • on older GCC versions use -fstack-protector as suggested by Warszawski, Diego
  • prevent creating the internal timer thread if a high-res hardware timer is found as reported by Lonnie Abelbeck

3.0.0

  • use RDTSC on x86 directly instead of clock_gettime
  • use SHA-3 instead of LFSR
  • add internal high-resolution timer support

2.2.0

  • SP800-90B compliance: Add RCT runtime health test
  • SP800-90B compliance: Add Chi-Squared runtime health test as a replacement for the adaptive proportion test
  • SP800-90B compliance: Increase initial entropy test to 1024 rounds
  • SP800-90B compliance: Invoke runtime health tests during initialization
  • remove FIPS 140-2 continuous self test (RCT covers the requirement as per FIPS 140-2 IG 9.8)
  • SP800-90B compliance: Do not mix stuck time deltas into entropy pool

2.1.2:

  • Add static library compilation thanks to Neil Horman
  • Initialize variable ec to satisfy valgrind as suggested by Steve Grubb
  • Add cross-compilation support suggested by Lonnie Abelbeck

2.1.1:

  • Fix implementation of mathematical properties.

2.1.0:

  • Convert all __[u|s][32|64] into [uint|int][32|64]_t
  • Remove all code protected by #if defined(KERNEL) && !defined(MODULE)
  • Add JENT_PRIVATE_COMPILE: Enable flag during compile when compiling a private copy of the Jitter RNG
  • Remove unused statistical test code
  • Add FIPS 140-2 continuous self test code
  • threshold for init-time stuck test configurable with JENT_STUCK_INIT_THRES during compile time

2.0.1:

  • Invcation of stuck test during initalization

2.0.0:

  • Replace the XOR folding of a time delta with an LFSR -- the use of an LFSR is mathematically more sound for the argument to maintain entropy

1.2.0:

  • Use constant time operation of jent_stir_pool to prevent leaking timing information about RNG.
  • Make it compile on 32 bit archtectures

1.1.0:

  • start new numbering schema
  • update processing of bit that is deemed holding no entropy by heuristic: XOR it into pool without LSFR and bit rotation (reported and suggested by Kevin Fowler kevpfowler@gmail.com)