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# frozen_string_literal: true
require "cose/algorithm/signature_algorithm"
require "cose/error"
require "cose/key/okp"
require "openssl"
module COSE
module Algorithm
class EdDSA < SignatureAlgorithm
private
def valid_key?(key)
cose_key = to_cose_key(key)
cose_key.is_a?(COSE::Key::OKP) && (!cose_key.alg || cose_key.alg == id)
end
def to_pkey(key)
case key
when COSE::Key::OKP
key.to_pkey
when OpenSSL::PKey::PKey
key
else
raise(COSE::Error, "Incompatible key for algorithm")
end
end
def valid_signature?(key, signature, verification_data)
pkey = to_pkey(key)
begin
pkey.verify(nil, signature, verification_data)
rescue OpenSSL::PKey::PKeyError
false
end
end
end
end
end
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