Commits on Feb 12, 2020

1. Benchmark passphrase API of Secure Cell …

   Right now we don't have support for this API in RustThemis so we call
   C code directly in decryption benchmark to prepare the input data.
   
   Note that due to the nature of the passphrase API -- KDF makes repeated
   invocations purposefully slow -- the benchmarks are abysmally slow too
   and we have to cut down the sample sizes to execute them in a resonable
   time frame. And we don't need to have much variety in the message size
   since execution time is completely dominated by KDF costs until we get
   to gigabyte-sized messages.
   
   There is quite a few "inheritance" in the code from master key
   benchmarks but I'll leave it around for now until we are sure what
   utilities can be shared. Plus, Criterion has issues with reusing code
   so we might need to introduce additional helper crates for that which
   I would like to avoid doing.

   

   ilammy committed Feb 12, 2020
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