include dieharder randomness check

[garlick]

It might be useful to include in our test suite scripts that run the dieharder PRNG test suite against disk images fuzzed with scrub's random pass.

I borrowed scrub's random fill algorithm (based on /dev/urandom seeded aes counter) in another project and ran it through. "fuzz" is just a program that emits infinite randomness on stdout, while "generator 200" is dieharder's raw stdin mode:

$ fuzz | dieharder -g 200 -a
#=============================================================================#
#            dieharder version 3.31.1 Copyright 2003 Robert G. Brown          #
#=============================================================================#
   rng_name    |rands/second|   Seed   |
stdin_input_raw|  1.95e+07  |1781118548|
#=============================================================================#
        test_name   |ntup| tsamples |psamples|  p-value |Assessment
#=============================================================================#
   diehard_birthdays|   0|       100|     100|0.88369892|  PASSED  
      diehard_operm5|   0|   1000000|     100|0.27636079|  PASSED  
  diehard_rank_32x32|   0|     40000|     100|0.83032047|  PASSED  
    diehard_rank_6x8|   0|    100000|     100|0.56150300|  PASSED  
   diehard_bitstream|   0|   2097152|     100|0.06602982|  PASSED  
        diehard_opso|   0|   2097152|     100|0.19779936|  PASSED  
        diehard_oqso|   0|   2097152|     100|0.91922195|  PASSED  
         diehard_dna|   0|   2097152|     100|0.96128960|  PASSED  
diehard_count_1s_str|   0|    256000|     100|0.89495422|  PASSED  
diehard_count_1s_byt|   0|    256000|     100|0.99865983|   WEAK   
 diehard_parking_lot|   0|     12000|     100|0.43795973|  PASSED  
    diehard_2dsphere|   2|      8000|     100|0.95357150|  PASSED  
    diehard_3dsphere|   3|      4000|     100|0.26285041|  PASSED  
     diehard_squeeze|   0|    100000|     100|0.46825150|  PASSED  
        diehard_sums|   0|       100|     100|0.75424165|  PASSED  
        diehard_runs|   0|    100000|     100|0.08168809|  PASSED  
        diehard_runs|   0|    100000|     100|0.79396703|  PASSED  
       diehard_craps|   0|    200000|     100|0.68331237|  PASSED  
       diehard_craps|   0|    200000|     100|0.78869877|  PASSED  
 marsaglia_tsang_gcd|   0|  10000000|     100|0.58000065|  PASSED  
 marsaglia_tsang_gcd|   0|  10000000|     100|0.82667972|  PASSED  
         sts_monobit|   1|    100000|     100|0.39302301|  PASSED  
            sts_runs|   2|    100000|     100|0.66066020|  PASSED  
          sts_serial|   1|    100000|     100|0.59349971|  PASSED  
          sts_serial|   2|    100000|     100|0.63188867|  PASSED  
          sts_serial|   3|    100000|     100|0.74789208|  PASSED  
          sts_serial|   3|    100000|     100|0.88735895|  PASSED  
          sts_serial|   4|    100000|     100|0.21691795|  PASSED  
          sts_serial|   4|    100000|     100|0.67992567|  PASSED  
          sts_serial|   5|    100000|     100|0.72657859|  PASSED  
          sts_serial|   5|    100000|     100|0.68516675|  PASSED  
          sts_serial|   6|    100000|     100|0.90483992|  PASSED  
          sts_serial|   6|    100000|     100|0.32521860|  PASSED  
          sts_serial|   7|    100000|     100|0.62766123|  PASSED  
          sts_serial|   7|    100000|     100|0.50116862|  PASSED  
          sts_serial|   8|    100000|     100|0.29416113|  PASSED  
          sts_serial|   8|    100000|     100|0.40425176|  PASSED  
          sts_serial|   9|    100000|     100|0.03213837|  PASSED  
          sts_serial|   9|    100000|     100|0.11385194|  PASSED  
          sts_serial|  10|    100000|     100|0.65613907|  PASSED  
          sts_serial|  10|    100000|     100|0.87510784|  PASSED  
          sts_serial|  11|    100000|     100|0.29821858|  PASSED  
          sts_serial|  11|    100000|     100|0.76588877|  PASSED  
          sts_serial|  12|    100000|     100|0.40928140|  PASSED  
          sts_serial|  12|    100000|     100|0.89362037|  PASSED  
          sts_serial|  13|    100000|     100|0.45256983|  PASSED  
          sts_serial|  13|    100000|     100|0.89790655|  PASSED  
          sts_serial|  14|    100000|     100|0.65773129|  PASSED  
          sts_serial|  14|    100000|     100|0.54351124|  PASSED  
          sts_serial|  15|    100000|     100|0.99426501|  PASSED  
          sts_serial|  15|    100000|     100|0.67091570|  PASSED  
          sts_serial|  16|    100000|     100|0.52857378|  PASSED  
          sts_serial|  16|    100000|     100|0.71494701|  PASSED  
         rgb_bitdist|   1|    100000|     100|0.16657224|  PASSED  
         rgb_bitdist|   2|    100000|     100|0.74229787|  PASSED  
         rgb_bitdist|   3|    100000|     100|0.88661586|  PASSED  
         rgb_bitdist|   4|    100000|     100|0.99225805|  PASSED  
         rgb_bitdist|   5|    100000|     100|0.59138409|  PASSED  
         rgb_bitdist|   6|    100000|     100|0.32530543|  PASSED  
         rgb_bitdist|   7|    100000|     100|0.98816548|  PASSED  
         rgb_bitdist|   8|    100000|     100|0.65342997|  PASSED  
         rgb_bitdist|   9|    100000|     100|0.18960951|  PASSED  
         rgb_bitdist|  10|    100000|     100|0.97042579|  PASSED  
         rgb_bitdist|  11|    100000|     100|0.19509408|  PASSED  
         rgb_bitdist|  12|    100000|     100|0.22011246|  PASSED  
rgb_minimum_distance|   2|     10000|    1000|0.28733897|  PASSED  
rgb_minimum_distance|   3|     10000|    1000|0.73658618|  PASSED  
rgb_minimum_distance|   4|     10000|    1000|0.57957327|  PASSED  
rgb_minimum_distance|   5|     10000|    1000|0.01041015|  PASSED  
    rgb_permutations|   2|    100000|     100|0.80618540|  PASSED  
    rgb_permutations|   3|    100000|     100|0.07174022|  PASSED  
    rgb_permutations|   4|    100000|     100|0.81289201|  PASSED  
    rgb_permutations|   5|    100000|     100|0.26890929|  PASSED  
      rgb_lagged_sum|   0|   1000000|     100|0.49400784|  PASSED  
      rgb_lagged_sum|   1|   1000000|     100|0.99998605|   WEAK   
      rgb_lagged_sum|   2|   1000000|     100|0.63410000|  PASSED  
      rgb_lagged_sum|   3|   1000000|     100|0.50211127|  PASSED  
      rgb_lagged_sum|   4|   1000000|     100|0.42163937|  PASSED  
      rgb_lagged_sum|   5|   1000000|     100|0.25924354|  PASSED  
      rgb_lagged_sum|   6|   1000000|     100|0.77993855|  PASSED  
      rgb_lagged_sum|   7|   1000000|     100|0.83636974|  PASSED  
      rgb_lagged_sum|   8|   1000000|     100|0.41536528|  PASSED  
      rgb_lagged_sum|   9|   1000000|     100|0.48393822|  PASSED  
      rgb_lagged_sum|  10|   1000000|     100|0.52195022|  PASSED  
      rgb_lagged_sum|  11|   1000000|     100|0.41107896|  PASSED  
      rgb_lagged_sum|  12|   1000000|     100|0.74121775|  PASSED  
      rgb_lagged_sum|  13|   1000000|     100|0.79929440|  PASSED  
      rgb_lagged_sum|  14|   1000000|     100|0.89385721|  PASSED  
      rgb_lagged_sum|  15|   1000000|     100|0.98728503|  PASSED  
      rgb_lagged_sum|  16|   1000000|     100|0.24029250|  PASSED  
      rgb_lagged_sum|  17|   1000000|     100|0.80790810|  PASSED  
      rgb_lagged_sum|  18|   1000000|     100|0.12823577|  PASSED  
      rgb_lagged_sum|  19|   1000000|     100|0.43789590|  PASSED  
      rgb_lagged_sum|  20|   1000000|     100|0.08817515|  PASSED  
      rgb_lagged_sum|  21|   1000000|     100|0.79148422|  PASSED  
      rgb_lagged_sum|  22|   1000000|     100|0.29786110|  PASSED  
      rgb_lagged_sum|  23|   1000000|     100|0.83792002|  PASSED  
      rgb_lagged_sum|  24|   1000000|     100|0.74103376|  PASSED  
      rgb_lagged_sum|  25|   1000000|     100|0.48539421|  PASSED  
      rgb_lagged_sum|  26|   1000000|     100|0.99802355|   WEAK   
      rgb_lagged_sum|  27|   1000000|     100|0.57183856|  PASSED  
      rgb_lagged_sum|  28|   1000000|     100|0.35218827|  PASSED  
      rgb_lagged_sum|  29|   1000000|     100|0.51636503|  PASSED  
      rgb_lagged_sum|  30|   1000000|     100|0.40489879|  PASSED  
      rgb_lagged_sum|  31|   1000000|     100|0.75258328|  PASSED  
      rgb_lagged_sum|  32|   1000000|     100|0.16146386|  PASSED  
     rgb_kstest_test|   0|     10000|    1000|0.57143056|  PASSED  
     dab_bytedistrib|   0|  51200000|       1|0.27321565|  PASSED  
             dab_dct| 256|     50000|       1|0.10556727|  PASSED  
Preparing to run test 207.  ntuple = 0
        dab_filltree|  32|  15000000|       1|0.28157599|  PASSED  
        dab_filltree|  32|  15000000|       1|0.94369853|  PASSED  
Preparing to run test 208.  ntuple = 0
       dab_filltree2|   0|   5000000|       1|0.22918371|  PASSED  
       dab_filltree2|   1|   5000000|       1|0.85235396|  PASSED  
Preparing to run test 209.  ntuple = 0
        dab_monobit2|  12|  65000000|       1|0.81334865|  PASSED  

so looks decent I guess. The Intel RDRAND mode could be tested as well.