require "./digest"
require "openssl/digest"

# Implements the SHA1 digest algorithm.
#
# NOTE: To use `SHA1`, you must explicitly import it with `require "digest/sha1"`
#
# WARNING: SHA1 is no longer a cryptographically secure hash, and should not be
# used in security-related components, like password hashing. For passwords, see
# `Crypto::Bcrypt::Password`. For a generic cryptographic hash, use SHA-256 via
# `Digest::SHA256`.
class Digest::SHA1 < ::OpenSSL::Digest
  extend ClassMethods

  def initialize
    super("SHA1")
  end

  protected def initialize(ctx : LibCrypto::EVP_MD_CTX)
    super("SHA1", ctx)
  end

  def dup
    self.class.new(dup_ctx)
  end
end