A class for calculating message digests using the SHA-1 Secure Hash Algorithm by NIST (the US' National Institute of Standards and Technology), described in FIPS PUB 180-1.

See Instance for digest API.

SHA-1 calculates a digest of 160 bits (20 bytes).

Examples

require 'digest'

Compute a complete digest

Digest::SHA1.hexdigest 'abc' #=> "a9993e36..."

Compute digest by chunks

sha1 = Digest::SHA1.new # =>#Digest::SHA1 sha1.update "ab" sha1 << "c" # alias for #update sha1.hexdigest # => "a9993e36..."

Use the same object to compute another digest

sha1.reset sha1 << "message" sha1.hexdigest # => "6f9b9af3..."