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Rust pseudo-random number generator based on AES

License: Apache License 2.0

Rust 100.00%

aes cryptography prng rust

aes-prng's Issues

Investigate simple performance improvement for Apple M1

AES seems to be slower than ChaCha on Apple M1:

rng_fill/chacha8/2000000
                        time:   [1.6929 ms 1.6940 ms 1.6951 ms]
Found 9 outliers among 100 measurements (9.00%)
  2 (2.00%) low severe
  1 (1.00%) low mild
  2 (2.00%) high mild
  4 (4.00%) high severe
rng_fill/chacha12/2000000
                        time:   [2.4556 ms 2.4581 ms 2.4606 ms]
Found 3 outliers among 100 measurements (3.00%)
  3 (3.00%) high mild
rng_fill/chacha20/2000000
                        time:   [3.9821 ms 3.9857 ms 3.9895 ms]
Found 4 outliers among 100 measurements (4.00%)
  4 (4.00%) high mild
rng_fill/aes/2000000    time:   [8.4624 ms 8.4707 ms 8.4792 ms]
Found 2 outliers among 100 measurements (2.00%)
  2 (2.00%) high mild

rng_next_u64/chacha8    time:   [8.0137 us 8.0212 us 8.0285 us]
Found 9 outliers among 100 measurements (9.00%)
  1 (1.00%) low mild
  4 (4.00%) high mild
  4 (4.00%) high severe
rng_next_u64/chacha12   time:   [11.055 us 11.065 us 11.076 us]
Found 7 outliers among 100 measurements (7.00%)
  1 (1.00%) low mild
  4 (4.00%) high mild
  2 (2.00%) high severe
rng_next_u64/chacha20   time:   [17.142 us 17.161 us 17.179 us]
Found 7 outliers among 100 measurements (7.00%)
  1 (1.00%) low mild
  5 (5.00%) high mild
  1 (1.00%) high severe
rng_next_u64/aes        time:   [36.918 us 36.950 us 36.983 us]
Found 10 outliers among 100 measurements (10.00%)
  5 (5.00%) low mild
  4 (4.00%) high mild
  1 (1.00%) high severe

Maybe this can be fixed by simply enabling a flag.

Implement trait `CryptoRng`

Currently the code does not implement the CryptoRng trait which indicates that the rng is secure for cryptographic purposes.

Enable branch protection etc

Add README

More benchmarks and tests

Implement `Clone`

Currently it is not possible to make a clone of an Rng.

Set up CI

Go through docs

Add small example to README.md

I suggest we use one where

a random seed is sampled on its own
the seed is used to fill a buffer of 1MB

Add benchmark results to README.md

Show results of cargo bench under new subsection

Rename `AesRng::generate_random_key` to `AesRng::generate_random_seed`

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