Digest ::SHA1

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 Digest::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..."