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# frozen_string_literal: true
require "cose/algorithm/signature_algorithm"
require "cose/key/rsa"
require "cose/error"
require "openssl"
require "openssl/signature_algorithm/rsapss"
module COSE
module Algorithm
class RSAPSS < SignatureAlgorithm
attr_reader :hash_function, :salt_length
def initialize(*args, hash_function:, salt_length:)
super(*args)
@hash_function = hash_function
@salt_length = salt_length
end
private
def valid_key?(key)
to_cose_key(key).is_a?(COSE::Key::RSA)
end
def signature_algorithm_class
OpenSSL::SignatureAlgorithm::RSAPSS
end
def to_pkey(key)
case key
when COSE::Key::RSA
key.to_pkey
when OpenSSL::PKey::RSA
key
else
raise(COSE::Error, "Incompatible key for algorithm")
end
end
end
end
end
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