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# File 'lib/mpp/server/verify.rb', line 19
def verify_or_challenge(authorization:, intent:, request:, realm:, secret_key:,
method: nil, description: nil, meta: nil, expires: nil, events: nil, body: nil)
method_name = method || "tempo"
request = Mpp::Units.transform_units(request)
dispatcher = events
events_enabled = dispatcher&.has_handlers?
method_context = events_enabled ? {name: method_name, intent: intent.name} : nil
new_challenge = Kernel.lambda { |credential = nil, error = nil, submitted_challenge = nil|
challenge = create_challenge(method_name, intent.name, request, realm, secret_key, description, meta, expires, body)
if error && dispatcher&.has_handlers?(Mpp::Events::PAYMENT_FAILED)
emit_payment_failed(
dispatcher: dispatcher,
challenge: challenge,
credential: credential,
error: error,
method: T.must(method_context),
request: request,
retry_challenge: challenge,
submitted_challenge: submitted_challenge
)
end
if dispatcher&.has_handlers?(Mpp::Events::CHALLENGE_CREATED)
emit_challenge_created(
dispatcher: dispatcher,
challenge: challenge,
credential: credential,
error: error,
method: T.must(method_context),
request: request
)
end
challenge
}
return new_challenge.call if authorization.nil?
payment_scheme = (authorization)
return new_challenge.call if payment_scheme.nil?
begin
credential = Mpp::Credential.from_authorization(payment_scheme)
rescue Mpp::ParseError => e
return new_challenge.call(nil, Mpp::MalformedCredentialError.new(reason: e.message))
end
echo = credential.challenge
begin
echo_request = echo.request.empty? ? {} : Mpp::Parsing.b64_decode(echo.request)
echo_opaque = (echo.opaque && !T.must(echo.opaque).empty?) ? Mpp::Parsing.b64_decode(echo.opaque) : nil
rescue Mpp::ParseError => e
return new_challenge.call(credential, Mpp::MalformedCredentialError.new(reason: e.message), echo)
end
expected_id = Mpp.generate_challenge_id(
secret_key: secret_key,
realm: echo.realm,
method: echo.method,
intent: echo.intent,
request: echo_request,
expires: echo.expires,
digest: echo.digest,
opaque: echo_opaque
)
unless Mpp.secure_compare(echo.id, expected_id)
return new_challenge.call(
credential,
Mpp::InvalidChallengeError.new(challenge_id: echo.id, reason: "challenge id mismatch"),
echo
)
end
unless echo.realm == realm && echo.method == method_name && echo.intent == intent.name
return new_challenge.call(
credential,
Mpp::InvalidChallengeError.new(challenge_id: echo.id, reason: "challenge binding mismatch"),
echo
)
end
unless echo_request == request
return new_challenge.call(
credential,
Mpp::InvalidChallengeError.new(challenge_id: echo.id, reason: "request mismatch"),
echo
)
end
unless echo_opaque == meta
return new_challenge.call(
credential,
Mpp::InvalidChallengeError.new(challenge_id: echo.id, reason: "metadata mismatch"),
echo
)
end
unless body_digest_matches?(echo, body)
return new_challenge.call(
credential,
Mpp::InvalidChallengeError.new(challenge_id: echo.id, reason: "body digest mismatch"),
echo
)
end
request.each do |key, value|
unless echo_request[key] == value
return new_challenge.call(
credential,
Mpp::InvalidChallengeError.new(challenge_id: echo.id, reason: "request field #{key} mismatch"),
echo
)
end
end
unless echo.expires
return new_challenge.call(
credential,
Mpp::InvalidChallengeError.new(challenge_id: echo.id, reason: "missing expiry"),
echo
)
end
begin
expires_dt = Time.iso8601(T.must(echo.expires).gsub("Z", "+00:00"))
rescue ArgumentError
return new_challenge.call(
credential,
Mpp::InvalidChallengeError.new(challenge_id: echo.id, reason: "invalid expiry"),
echo
)
end
if expires_dt < Time.now.utc
return new_challenge.call(credential, Mpp::PaymentExpiredError.new(expires: echo.expires), echo)
end
begin
receipt = intent.verify(credential, request)
rescue => e
if dispatcher&.has_handlers?(Mpp::Events::PAYMENT_FAILED)
emit_payment_failed(
dispatcher: dispatcher,
challenge: echo,
credential: credential,
error: e,
method: T.must(method_context),
request: request,
submitted_challenge: echo
)
end
Kernel.raise
end
if dispatcher&.has_handlers?(Mpp::Events::PAYMENT_SUCCESS)
emit_payment_success(
dispatcher: dispatcher,
challenge: echo,
credential: credential,
method: T.must(method_context),
receipt: receipt,
request: request
)
end
[credential, receipt]
end
|