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# OpenSSL::Timestamp::Factory < Object (from ruby core) --- Used to generate a Response from scratch. Please bear in mind that the implementation will always apply and prefer the policy object identifier given in the request over the default policy id specified in the Factory. As a consequence, `default_policy_id` will only be applied if no Request#policy_id was given. But this also means that one needs to check the policy identifier in the request manually before creating the Response, e.g. to check whether it complies to a specific set of acceptable policies. There exists also the possibility to add certificates (instances of OpenSSL::X509::Certificate) besides the timestamping certificate that will be included in the resulting timestamp token if Request#cert_requested? is `true`. Ideally, one would also include any intermediate certificates (the root certificate can be left out - in order to trust it any verifying party will have to be in its possession anyway). This simplifies validation of the timestamp since these intermediate certificates are "already there" and need not be passed as external parameters to Response#verify anymore, thus minimizing external resources needed for verification. ### Example: Inclusion of (untrusted) intermediate certificates Assume we received a timestamp request that has set Request#policy_id to `nil` and Request#cert_requested? to true. The raw request bytes are stored in a variable called `req_raw`. We'd still like to integrate the necessary intermediate certificates (in `inter1.cer` and `inter2.cer`) to simplify validation of the resulting Response. `ts.p12` is a PKCS#12-compatible file including the private key and the timestamping certificate. req = OpenSSL::Timestamp::Request.new(raw_bytes) p12 = OpenSSL::PKCS12.new(File.binread('ts.p12'), 'pwd') inter1 = OpenSSL::X509::Certificate.new(File.binread('inter1.cer')) inter2 = OpenSSL::X509::Certificate.new(File.binread('inter2.cer')) fac = OpenSSL::Timestamp::Factory.new fac.gen_time = Time.now fac.serial_number = 1 fac.allowed_digests = ["sha256", "sha384", "sha512"] #needed because the Request contained no policy identifier fac.default_policy_id = '1.2.3.4.5' fac.additional_certificates = [ inter1, inter2 ] timestamp = fac.create_timestamp(p12.key, p12.certificate, req) ## Attributes ### default_policy_id Request#policy_id will always be preferred over this if present in the Request, only if Request#policy_id is nil default_policy will be used. If none of both is present, a TimestampError will be raised when trying to create a Response. call-seq: factory.default_policy_id = "string" -> string factory.default_policy_id -> string or nil ### serial_number Sets or retrieves the serial number to be used for timestamp creation. Must be present for timestamp creation. call-seq: factory.serial_number = number -> number factory.serial_number -> number or nil ### gen_time Sets or retrieves the Time value to be used in the Response. Must be present for timestamp creation. call-seq: factory.gen_time = Time -> Time factory.gen_time -> Time or nil ### additional_certs Sets or retrieves additional certificates apart from the timestamp certificate (e.g. intermediate certificates) to be added to the Response. Must be an Array of OpenSSL::X509::Certificate. call-seq: factory.additional_certs = [cert1, cert2] -> [ cert1, cert2 ] factory.additional_certs -> array or nil ### allowed_digests Sets or retrieves the digest algorithms that the factory is allowed create timestamps for. Known vulnerable or weak algorithms should not be allowed where possible. Must be an Array of String or OpenSSL::Digest subclass instances. call-seq: factory.allowed_digests = ["sha1", OpenSSL::Digest.new('SHA256').new] -> [ "sha1", OpenSSL::Digest) ] factory.allowed_digests -> array or nil --- # Instance methods: additional_certs allowed_digests create_timestamp default_policy_id gen_time serial_number # Attributes: attr_accessor additional_certs attr_accessor allowed_digests attr_accessor default_policy_id attr_accessor gen_time attr_accessor serial_number
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