window-crypto
v1.1.0
Published
window.crypto polyfill based on js-chacha20
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window-crypto
This is a window.crypto polyfill based on ChaCha20 stream cipher.
Some libraries out there require window.crypto, but there are still browsers that don't have it. React Native environment also lacks this API at the moment, thus this polyfill.
Security note
If some library needs window.crypto, the general recommendation is to not use that library in environments where this API is missing. Use a polyfill only if really necessary.
This polyfill uses ChaCha20 stream cipher to obtain pseudo-random numbers, which seems to be the industry standard now. But this polyfill has not been reviewed by a cryptography specialist, so use it as your own risk. And feedback is welcome.
For the lack of anything else so far, this generator was tested with the Dieharder suite. Read its man page to decide what it's worth. The results of the test are below on this page.
Usage
Either import it in the source as a side effect:
import "window-crypto";or simply include as a script:
<script src="https://unpkg.com/window-crypto"></script>Dieharder test
Below is the output of the dieharder test for this polyfill. To run the test, call yarn run dieharder.
For comparison the test has an alternative "silly" generator based on Math.random. To run the test with that generator, define the SILLY variable (for example, run SILLY=1 yarn run dieharder).
#=============================================================================#
# dieharder version 3.31.1 Copyright 2003 Robert G. Brown #
#=============================================================================#
rng_name |rands/second| Seed |
stdin_input_raw| 5.15e+06 |2676942317|
#=============================================================================#
test_name |ntup| tsamples |psamples| p-value |Assessment
#=============================================================================#
diehard_birthdays| 0| 100| 100|0.11286983| PASSED
diehard_operm5| 0| 1000000| 100|0.64251017| PASSED
diehard_rank_32x32| 0| 40000| 100|0.59326459| PASSED
diehard_rank_6x8| 0| 100000| 100|0.63397051| PASSED
diehard_bitstream| 0| 2097152| 100|0.19579009| PASSED
diehard_opso| 0| 2097152| 100|0.86910032| PASSED
diehard_oqso| 0| 2097152| 100|0.67464303| PASSED
diehard_dna| 0| 2097152| 100|0.49934594| PASSED
diehard_count_1s_str| 0| 256000| 100|0.36921974| PASSED
diehard_count_1s_byt| 0| 256000| 100|0.27721349| PASSED
diehard_parking_lot| 0| 12000| 100|0.63285114| PASSED
diehard_2dsphere| 2| 8000| 100|0.19947870| PASSED
diehard_3dsphere| 3| 4000| 100|0.56098232| PASSED
diehard_squeeze| 0| 100000| 100|0.12409929| PASSED
diehard_sums| 0| 100| 100|0.03170372| PASSED
diehard_runs| 0| 100000| 100|0.51819923| PASSED
diehard_runs| 0| 100000| 100|0.58622510| PASSED
diehard_craps| 0| 200000| 100|0.61161595| PASSED
diehard_craps| 0| 200000| 100|0.69774240| PASSED
marsaglia_tsang_gcd| 0| 10000000| 100|0.26175739| PASSED
marsaglia_tsang_gcd| 0| 10000000| 100|0.66363744| PASSED
sts_monobit| 1| 100000| 100|0.09174816| PASSED
sts_runs| 2| 100000| 100|0.93853546| PASSED
sts_serial| 1| 100000| 100|0.40588407| PASSED
sts_serial| 2| 100000| 100|0.28638704| PASSED
sts_serial| 3| 100000| 100|0.32605540| PASSED
sts_serial| 3| 100000| 100|0.77594721| PASSED
sts_serial| 4| 100000| 100|0.68066552| PASSED
sts_serial| 4| 100000| 100|0.87138591| PASSED
sts_serial| 5| 100000| 100|0.95934767| PASSED
sts_serial| 5| 100000| 100|0.48898618| PASSED
sts_serial| 6| 100000| 100|0.49290158| PASSED
sts_serial| 6| 100000| 100|0.89587085| PASSED
sts_serial| 7| 100000| 100|0.22464842| PASSED
sts_serial| 7| 100000| 100|0.13594484| PASSED
sts_serial| 8| 100000| 100|0.98188063| PASSED
sts_serial| 8| 100000| 100|0.93167927| PASSED
sts_serial| 9| 100000| 100|0.41182155| PASSED
sts_serial| 9| 100000| 100|0.52454287| PASSED
sts_serial| 10| 100000| 100|0.97997121| PASSED
sts_serial| 10| 100000| 100|0.76006365| PASSED
sts_serial| 11| 100000| 100|0.11869395| PASSED
sts_serial| 11| 100000| 100|0.36634544| PASSED
sts_serial| 12| 100000| 100|0.50049554| PASSED
sts_serial| 12| 100000| 100|0.24534745| PASSED
sts_serial| 13| 100000| 100|0.81680310| PASSED
sts_serial| 13| 100000| 100|0.87310308| PASSED
sts_serial| 14| 100000| 100|0.67097595| PASSED
sts_serial| 14| 100000| 100|0.46831145| PASSED
sts_serial| 15| 100000| 100|0.63252790| PASSED
sts_serial| 15| 100000| 100|0.86075883| PASSED
sts_serial| 16| 100000| 100|0.78780244| PASSED
sts_serial| 16| 100000| 100|0.35648010| PASSED
rgb_bitdist| 1| 100000| 100|0.38142986| PASSED
rgb_bitdist| 2| 100000| 100|0.89778380| PASSED
rgb_bitdist| 3| 100000| 100|0.96901690| PASSED
rgb_bitdist| 4| 100000| 100|0.93874137| PASSED
rgb_bitdist| 5| 100000| 100|0.90597584| PASSED
rgb_bitdist| 6| 100000| 100|0.97551321| PASSED
rgb_bitdist| 7| 100000| 100|0.25468218| PASSED
rgb_bitdist| 8| 100000| 100|0.97492050| PASSED
rgb_bitdist| 9| 100000| 100|0.38524501| PASSED
rgb_bitdist| 10| 100000| 100|0.44063253| PASSED
rgb_bitdist| 11| 100000| 100|0.54635035| PASSED
rgb_bitdist| 12| 100000| 100|0.14377146| PASSED
rgb_minimum_distance| 2| 10000| 1000|0.52364405| PASSED
rgb_minimum_distance| 3| 10000| 1000|0.41345333| PASSED
rgb_minimum_distance| 4| 10000| 1000|0.27659281| PASSED
rgb_minimum_distance| 5| 10000| 1000|0.86144569| PASSED
rgb_permutations| 2| 100000| 100|0.11689066| PASSED
rgb_permutations| 3| 100000| 100|0.91876926| PASSED
rgb_permutations| 4| 100000| 100|0.08052014| PASSED
rgb_permutations| 5| 100000| 100|0.58390664| PASSED
rgb_lagged_sum| 0| 1000000| 100|0.21709182| PASSED
rgb_lagged_sum| 1| 1000000| 100|0.50963744| PASSED
rgb_lagged_sum| 2| 1000000| 100|0.32871356| PASSED
rgb_lagged_sum| 3| 1000000| 100|0.96747604| PASSED
rgb_lagged_sum| 4| 1000000| 100|0.42236501| PASSED
rgb_lagged_sum| 5| 1000000| 100|0.00850750| PASSED
rgb_lagged_sum| 6| 1000000| 100|0.20214866| PASSED
rgb_lagged_sum| 7| 1000000| 100|0.95562548| PASSED
rgb_lagged_sum| 8| 1000000| 100|0.71953032| PASSED
rgb_lagged_sum| 9| 1000000| 100|0.76027377| PASSED
rgb_lagged_sum| 10| 1000000| 100|0.24613375| PASSED
rgb_lagged_sum| 11| 1000000| 100|0.06911765| PASSED
rgb_lagged_sum| 12| 1000000| 100|0.81354001| PASSED
rgb_lagged_sum| 13| 1000000| 100|0.06035357| PASSED
rgb_lagged_sum| 14| 1000000| 100|0.60267011| PASSED
rgb_lagged_sum| 15| 1000000| 100|0.60048406| PASSED
rgb_lagged_sum| 16| 1000000| 100|0.62429855| PASSED
rgb_lagged_sum| 17| 1000000| 100|0.41488818| PASSED
rgb_lagged_sum| 18| 1000000| 100|0.08157201| PASSED
rgb_lagged_sum| 19| 1000000| 100|0.85462879| PASSED
rgb_lagged_sum| 20| 1000000| 100|0.99999440| WEAK
rgb_lagged_sum| 21| 1000000| 100|0.66276067| PASSED
rgb_lagged_sum| 22| 1000000| 100|0.00815589| PASSED
rgb_lagged_sum| 23| 1000000| 100|0.60600236| PASSED
rgb_lagged_sum| 24| 1000000| 100|0.14925169| PASSED
rgb_lagged_sum| 25| 1000000| 100|0.48610548| PASSED
rgb_lagged_sum| 26| 1000000| 100|0.01111350| PASSED
rgb_lagged_sum| 27| 1000000| 100|0.28775100| PASSED
rgb_lagged_sum| 28| 1000000| 100|0.39199598| PASSED
rgb_lagged_sum| 29| 1000000| 100|0.65837097| PASSED
rgb_lagged_sum| 30| 1000000| 100|0.93427530| PASSED
rgb_lagged_sum| 31| 1000000| 100|0.52155253| PASSED
rgb_lagged_sum| 32| 1000000| 100|0.92805026| PASSED
rgb_kstest_test| 0| 10000| 1000|0.27767761| PASSED
dab_bytedistrib| 0| 51200000| 1|0.49630084| PASSED
dab_dct| 256| 50000| 1|0.45062598| PASSED
Preparing to run test 207. ntuple = 0
dab_filltree| 32| 15000000| 1|0.60622718| PASSED
dab_filltree| 32| 15000000| 1|0.70054702| PASSED
Preparing to run test 208. ntuple = 0
dab_filltree2| 0| 5000000| 1|0.08831021| PASSED
dab_filltree2| 1| 5000000| 1|0.40168457| PASSED
Preparing to run test 209. ntuple = 0
dab_monobit2| 12| 65000000| 1|0.72722186| PASSED