make encrypt easy understand

[thinkgos]

No description provided.

[codecov]

Codecov Report

Merging #1 into master will decrease coverage by 0.00%.
The diff coverage is 88.23%.

@@            Coverage Diff             @@
##           master       #1      +/-   ##
==========================================
- Coverage   88.45%   88.45%   -0.01%     
==========================================
  Files          36       36              
  Lines        1135     1109      -26     
==========================================
- Hits         1004      981      -23     
+ Misses        111      108       -3     
  Partials       20       20              

Impacted Files	Coverage Δ
lib/encrypt/encrypt.go	88.34% <83.33%> (+3.86%)	⬆️
lib/encrypt/stream.go	90.32% <100.00%> (-0.66%)	⬇️

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