perl -MDigest::SHA1 -le 'print Digest::SHA1::sha1_hex(shift)' s3cr3t
25ab86bed149ca6ca9c1c0d5db7c9a91388ddeab

perl -MDigest::SHA1 -le 'print Digest::SHA1::sha1_hex(shift)' s3cr3ts
0b8afdce3abe965be751e15143604eb17ee1290e