test: add a public domain SHA1 implementation.
test: add a public domain SHA1 implementation.

SingingTree/nestegg,kinetiknz/nestegg,fallaciousreasoning/nestegg,bit/nestegg,kinetiknz/nestegg,kinetiknz/nestegg,SingingTree/nestegg,bit/nestegg,fallaciousreasoning/nestegg,SingingTree/nestegg