Add cryptographic functions with option to specify custom functions #149

Job	Run time
Check workflows	5s
Build, lint, and test / Prepare	24s
Build, lint, and test / Build	44s
Build, lint, and test / Test (16.x)	3m 6s
Build, lint, and test / Lint	35s
Build, lint, and test / Test (18.x)	3m 1s
Build, lint, and test / Compatibility test (16.x)	3m 23s
Build, lint, and test / Test (20.x)	2m 34s
Build, lint, and test / Compatibility test (20.x)	2m 56s
All jobs completed	1s
All jobs pass	1s
is-release	0s
Publish release	0s
	16m 50s

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