# frozen_string_literal: true

# Copyright 2021 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# Auto-generated by gapic-generator-ruby. DO NOT EDIT!


module Google
  module Cloud
    module Security
      module PrivateCA
        module V1
          # A {::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority CertificateAuthority} represents an individual Certificate Authority.
          # A {::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority CertificateAuthority} can be used to create {::Google::Cloud::Security::PrivateCA::V1::Certificate Certificates}.
          # @!attribute [r] name
          #   @return [::String]
          #     Output only. The resource name for this {::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority CertificateAuthority} in the
          #     format `projects/*/locations/*/caPools/*/certificateAuthorities/*`.
          # @!attribute [rw] type
          #   @return [::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority::Type]
          #     Required. Immutable. The {::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority::Type Type} of this {::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority CertificateAuthority}.
          # @!attribute [rw] config
          #   @return [::Google::Cloud::Security::PrivateCA::V1::CertificateConfig]
          #     Required. Immutable. The config used to create a self-signed X.509 certificate or CSR.
          # @!attribute [rw] lifetime
          #   @return [::Google::Protobuf::Duration]
          #     Required. Immutable. The desired lifetime of the CA certificate. Used to create the
          #     "not_before_time" and "not_after_time" fields inside an X.509
          #     certificate.
          # @!attribute [rw] key_spec
          #   @return [::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority::KeyVersionSpec]
          #     Required. Immutable. Used when issuing certificates for this {::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority CertificateAuthority}. If this
          #     {::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority CertificateAuthority} is a self-signed CertificateAuthority, this key
          #     is also used to sign the self-signed CA certificate. Otherwise, it
          #     is used to sign a CSR.
          # @!attribute [rw] subordinate_config
          #   @return [::Google::Cloud::Security::PrivateCA::V1::SubordinateConfig]
          #     Optional. If this is a subordinate {::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority CertificateAuthority}, this field will be set
          #     with the subordinate configuration, which describes its issuers. This may
          #     be updated, but this {::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority CertificateAuthority} must continue to validate.
          # @!attribute [r] tier
          #   @return [::Google::Cloud::Security::PrivateCA::V1::CaPool::Tier]
          #     Output only. The {::Google::Cloud::Security::PrivateCA::V1::CaPool::Tier CaPool.Tier} of the {::Google::Cloud::Security::PrivateCA::V1::CaPool CaPool} that includes this
          #     {::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority CertificateAuthority}.
          # @!attribute [r] state
          #   @return [::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority::State]
          #     Output only. The {::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority::State State} for this {::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority CertificateAuthority}.
          # @!attribute [r] pem_ca_certificates
          #   @return [::Array<::String>]
          #     Output only. This {::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority CertificateAuthority}'s certificate chain, including the current
          #     {::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority CertificateAuthority}'s certificate. Ordered such that the root issuer
          #     is the final element (consistent with RFC 5246). For a self-signed CA, this
          #     will only list the current {::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority CertificateAuthority}'s certificate.
          # @!attribute [r] ca_certificate_descriptions
          #   @return [::Array<::Google::Cloud::Security::PrivateCA::V1::CertificateDescription>]
          #     Output only. A structured description of this {::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority CertificateAuthority}'s CA certificate
          #     and its issuers. Ordered as self-to-root.
          # @!attribute [rw] gcs_bucket
          #   @return [::String]
          #     Immutable. The name of a Cloud Storage bucket where this {::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority CertificateAuthority} will
          #     publish content, such as the CA certificate and CRLs. This must be a bucket
          #     name, without any prefixes (such as `gs://`) or suffixes (such as
          #     `.googleapis.com`). For example, to use a bucket named `my-bucket`, you
          #     would simply specify `my-bucket`. If not specified, a managed bucket will
          #     be created.
          # @!attribute [r] access_urls
          #   @return [::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority::AccessUrls]
          #     Output only. URLs for accessing content published by this CA, such as the CA certificate
          #     and CRLs.
          # @!attribute [r] create_time
          #   @return [::Google::Protobuf::Timestamp]
          #     Output only. The time at which this {::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority CertificateAuthority} was created.
          # @!attribute [r] update_time
          #   @return [::Google::Protobuf::Timestamp]
          #     Output only. The time at which this {::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority CertificateAuthority} was last updated.
          # @!attribute [r] delete_time
          #   @return [::Google::Protobuf::Timestamp]
          #     Output only. The time at which this {::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority CertificateAuthority} was soft deleted, if
          #     it is in the {::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority::State::DELETED DELETED} state.
          # @!attribute [r] expire_time
          #   @return [::Google::Protobuf::Timestamp]
          #     Output only. The time at which this {::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority CertificateAuthority} will be permanently purged,
          #     if it is in the {::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority::State::DELETED DELETED} state.
          # @!attribute [rw] labels
          #   @return [::Google::Protobuf::Map{::String => ::String}]
          #     Optional. Labels with user-defined metadata.
          class CertificateAuthority
            include ::Google::Protobuf::MessageExts
            extend ::Google::Protobuf::MessageExts::ClassMethods

            # URLs where a {::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority CertificateAuthority} will publish content.
            # @!attribute [rw] ca_certificate_access_url
            #   @return [::String]
            #     The URL where this {::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority CertificateAuthority}'s CA certificate is
            #     published. This will only be set for CAs that have been activated.
            # @!attribute [rw] crl_access_urls
            #   @return [::Array<::String>]
            #     The URLs where this {::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority CertificateAuthority}'s CRLs are published. This
            #     will only be set for CAs that have been activated.
            class AccessUrls
              include ::Google::Protobuf::MessageExts
              extend ::Google::Protobuf::MessageExts::ClassMethods
            end

            # A Cloud KMS key configuration that a {::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority CertificateAuthority} will use.
            # @!attribute [rw] cloud_kms_key_version
            #   @return [::String]
            #     The resource name for an existing Cloud KMS CryptoKeyVersion in the
            #     format
            #     `projects/*/locations/*/keyRings/*/cryptoKeys/*/cryptoKeyVersions/*`.
            #     This option enables full flexibility in the key's capabilities and
            #     properties.
            # @!attribute [rw] algorithm
            #   @return [::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority::SignHashAlgorithm]
            #     The algorithm to use for creating a managed Cloud KMS key for a for a
            #     simplified experience. All managed keys will be have their
            #     [ProtectionLevel][google.cloud.kms.v1.ProtectionLevel] as `HSM`.
            class KeyVersionSpec
              include ::Google::Protobuf::MessageExts
              extend ::Google::Protobuf::MessageExts::ClassMethods
            end

            # @!attribute [rw] key
            #   @return [::String]
            # @!attribute [rw] value
            #   @return [::String]
            class LabelsEntry
              include ::Google::Protobuf::MessageExts
              extend ::Google::Protobuf::MessageExts::ClassMethods
            end

            # The type of a {::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority CertificateAuthority}, indicating its issuing chain.
            module Type
              # Not specified.
              TYPE_UNSPECIFIED = 0

              # Self-signed CA.
              SELF_SIGNED = 1

              # Subordinate CA. Could be issued by a Private CA {::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority CertificateAuthority}
              # or an unmanaged CA.
              SUBORDINATE = 2
            end

            # The state of a {::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority CertificateAuthority}, indicating if it can be used.
            module State
              # Not specified.
              STATE_UNSPECIFIED = 0

              # Certificates can be issued from this CA. CRLs will be generated for this
              # CA. The CA will be part of the {::Google::Cloud::Security::PrivateCA::V1::CaPool CaPool}'s trust anchor, and will be
              # used to issue certificates from the {::Google::Cloud::Security::PrivateCA::V1::CaPool CaPool}.
              ENABLED = 1

              # Certificates cannot be issued from this CA. CRLs will still be generated.
              # The CA will be part of the {::Google::Cloud::Security::PrivateCA::V1::CaPool CaPool}'s trust anchor, but will not be
              # used to issue certificates from the {::Google::Cloud::Security::PrivateCA::V1::CaPool CaPool}.
              DISABLED = 2

              # Certificates can be issued from this CA. CRLs will be generated for this
              # CA. The CA will be part of the {::Google::Cloud::Security::PrivateCA::V1::CaPool CaPool}'s trust anchor, but will not
              # be used to issue certificates from the {::Google::Cloud::Security::PrivateCA::V1::CaPool CaPool}.
              STAGED = 3

              # Certificates cannot be issued from this CA. CRLs will not be generated.
              # The CA will not be part of the {::Google::Cloud::Security::PrivateCA::V1::CaPool CaPool}'s trust anchor, and will not be
              # used to issue certificates from the {::Google::Cloud::Security::PrivateCA::V1::CaPool CaPool}.
              AWAITING_USER_ACTIVATION = 4

              # Certificates cannot be issued from this CA. CRLs will not be generated.
              # The CA may still be recovered by calling
              # {::Google::Cloud::Security::PrivateCA::V1::CertificateAuthorityService::Client#undelete_certificate_authority CertificateAuthorityService.UndeleteCertificateAuthority} before
              # {::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority#expire_time expire_time}.
              # The CA will not be part of the {::Google::Cloud::Security::PrivateCA::V1::CaPool CaPool}'s trust anchor, and will not be
              # used to issue certificates from the {::Google::Cloud::Security::PrivateCA::V1::CaPool CaPool}.
              DELETED = 5
            end

            # The algorithm of a Cloud KMS CryptoKeyVersion of a
            # [CryptoKey][google.cloud.kms.v1.CryptoKey] with the
            # [CryptoKeyPurpose][google.cloud.kms.v1.CryptoKey.CryptoKeyPurpose] value
            # `ASYMMETRIC_SIGN`. These values correspond to the
            # [CryptoKeyVersionAlgorithm][google.cloud.kms.v1.CryptoKeyVersion.CryptoKeyVersionAlgorithm]
            # values. For RSA signing algorithms, the PSS algorithms should be preferred,
            # use PKCS1 algorithms if required for compatibility. For further
            # recommendations, see
            # https://cloud.google.com/kms/docs/algorithms#algorithm_recommendations.
            module SignHashAlgorithm
              # Not specified.
              SIGN_HASH_ALGORITHM_UNSPECIFIED = 0

              # maps to CryptoKeyVersionAlgorithm.RSA_SIGN_PSS_2048_SHA256
              RSA_PSS_2048_SHA256 = 1

              # maps to CryptoKeyVersionAlgorithm. RSA_SIGN_PSS_3072_SHA256
              RSA_PSS_3072_SHA256 = 2

              # maps to CryptoKeyVersionAlgorithm.RSA_SIGN_PSS_4096_SHA256
              RSA_PSS_4096_SHA256 = 3

              # maps to CryptoKeyVersionAlgorithm.RSA_SIGN_PKCS1_2048_SHA256
              RSA_PKCS1_2048_SHA256 = 6

              # maps to CryptoKeyVersionAlgorithm.RSA_SIGN_PKCS1_3072_SHA256
              RSA_PKCS1_3072_SHA256 = 7

              # maps to CryptoKeyVersionAlgorithm.RSA_SIGN_PKCS1_4096_SHA256
              RSA_PKCS1_4096_SHA256 = 8

              # maps to CryptoKeyVersionAlgorithm.EC_SIGN_P256_SHA256
              EC_P256_SHA256 = 4

              # maps to CryptoKeyVersionAlgorithm.EC_SIGN_P384_SHA384
              EC_P384_SHA384 = 5
            end
          end

          # A {::Google::Cloud::Security::PrivateCA::V1::CaPool CaPool} represents a group of
          # {::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority CertificateAuthorities} that form a trust anchor. A
          # {::Google::Cloud::Security::PrivateCA::V1::CaPool CaPool} can be used to manage issuance policies for one or more
          # {::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority CertificateAuthority} resources and to rotate CA certificates in and out
          # of the trust anchor.
          # @!attribute [r] name
          #   @return [::String]
          #     Output only. The resource name for this {::Google::Cloud::Security::PrivateCA::V1::CaPool CaPool} in the
          #     format `projects/*/locations/*/caPools/*`.
          # @!attribute [rw] tier
          #   @return [::Google::Cloud::Security::PrivateCA::V1::CaPool::Tier]
          #     Required. Immutable. The {::Google::Cloud::Security::PrivateCA::V1::CaPool::Tier Tier} of this {::Google::Cloud::Security::PrivateCA::V1::CaPool CaPool}.
          # @!attribute [rw] issuance_policy
          #   @return [::Google::Cloud::Security::PrivateCA::V1::CaPool::IssuancePolicy]
          #     Optional. The {::Google::Cloud::Security::PrivateCA::V1::CaPool::IssuancePolicy IssuancePolicy} to control how {::Google::Cloud::Security::PrivateCA::V1::Certificate Certificates}
          #     will be issued from this {::Google::Cloud::Security::PrivateCA::V1::CaPool CaPool}.
          # @!attribute [rw] publishing_options
          #   @return [::Google::Cloud::Security::PrivateCA::V1::CaPool::PublishingOptions]
          #     Optional. The {::Google::Cloud::Security::PrivateCA::V1::CaPool::PublishingOptions PublishingOptions} to follow when issuing
          #     {::Google::Cloud::Security::PrivateCA::V1::Certificate Certificates} from any {::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority CertificateAuthority} in this
          #     {::Google::Cloud::Security::PrivateCA::V1::CaPool CaPool}.
          # @!attribute [rw] labels
          #   @return [::Google::Protobuf::Map{::String => ::String}]
          #     Optional. Labels with user-defined metadata.
          class CaPool
            include ::Google::Protobuf::MessageExts
            extend ::Google::Protobuf::MessageExts::ClassMethods

            # Options relating to the publication of each {::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority CertificateAuthority}'s CA
            # certificate and CRLs and their inclusion as extensions in issued
            # {::Google::Cloud::Security::PrivateCA::V1::Certificate Certificates}. The options set here apply to certificates
            # issued by any {::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority CertificateAuthority} in the {::Google::Cloud::Security::PrivateCA::V1::CaPool CaPool}.
            # @!attribute [rw] publish_ca_cert
            #   @return [::Boolean]
            #     Optional. When true, publishes each {::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority CertificateAuthority}'s CA certificate and
            #     includes its URL in the "Authority Information Access" X.509 extension
            #     in all issued {::Google::Cloud::Security::PrivateCA::V1::Certificate Certificates}. If this is false, the CA
            #     certificate will not be published and the corresponding X.509 extension
            #     will not be written in issued certificates.
            # @!attribute [rw] publish_crl
            #   @return [::Boolean]
            #     Optional. When true, publishes each {::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority CertificateAuthority}'s CRL and includes its
            #     URL in the "CRL Distribution Points" X.509 extension in all issued
            #     {::Google::Cloud::Security::PrivateCA::V1::Certificate Certificates}. If this is false, CRLs will not be published
            #     and the corresponding X.509 extension will not be written in issued
            #     certificates.
            #     CRLs will expire 7 days from their creation. However, we will rebuild
            #     daily. CRLs are also rebuilt shortly after a certificate is revoked.
            class PublishingOptions
              include ::Google::Protobuf::MessageExts
              extend ::Google::Protobuf::MessageExts::ClassMethods
            end

            # Defines controls over all certificate issuance within a {::Google::Cloud::Security::PrivateCA::V1::CaPool CaPool}.
            # @!attribute [rw] allowed_key_types
            #   @return [::Array<::Google::Cloud::Security::PrivateCA::V1::CaPool::IssuancePolicy::AllowedKeyType>]
            #     Optional. If any {::Google::Cloud::Security::PrivateCA::V1::CaPool::IssuancePolicy::AllowedKeyType AllowedKeyType} is specified, then the certificate request's
            #     public key must match one of the key types listed here. Otherwise,
            #     any key may be used.
            # @!attribute [rw] maximum_lifetime
            #   @return [::Google::Protobuf::Duration]
            #     Optional. The maximum lifetime allowed for issued {::Google::Cloud::Security::PrivateCA::V1::Certificate Certificates}. Note
            #     that if the issuing {::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority CertificateAuthority} expires before a
            #     {::Google::Cloud::Security::PrivateCA::V1::Certificate Certificate}'s requested maximum_lifetime, the effective lifetime will
            #     be explicitly truncated to match it.
            # @!attribute [rw] allowed_issuance_modes
            #   @return [::Google::Cloud::Security::PrivateCA::V1::CaPool::IssuancePolicy::IssuanceModes]
            #     Optional. If specified, then only methods allowed in the {::Google::Cloud::Security::PrivateCA::V1::CaPool::IssuancePolicy::IssuanceModes IssuanceModes} may be
            #     used to issue {::Google::Cloud::Security::PrivateCA::V1::Certificate Certificates}.
            # @!attribute [rw] baseline_values
            #   @return [::Google::Cloud::Security::PrivateCA::V1::X509Parameters]
            #     Optional. A set of X.509 values that will be applied to all certificates issued
            #     through this {::Google::Cloud::Security::PrivateCA::V1::CaPool CaPool}. If a certificate request includes conflicting
            #     values for the same properties, they will be overwritten by the values
            #     defined here. If a certificate request uses a {::Google::Cloud::Security::PrivateCA::V1::CertificateTemplate CertificateTemplate}
            #     that defines conflicting
            #     {::Google::Cloud::Security::PrivateCA::V1::CertificateTemplate#predefined_values predefined_values} for the same
            #     properties, the certificate issuance request will fail.
            # @!attribute [rw] identity_constraints
            #   @return [::Google::Cloud::Security::PrivateCA::V1::CertificateIdentityConstraints]
            #     Optional. Describes constraints on identities that may appear in
            #     {::Google::Cloud::Security::PrivateCA::V1::Certificate Certificates} issued through this {::Google::Cloud::Security::PrivateCA::V1::CaPool CaPool}.
            #     If this is omitted, then this {::Google::Cloud::Security::PrivateCA::V1::CaPool CaPool} will not add restrictions on a
            #     certificate's identity.
            # @!attribute [rw] passthrough_extensions
            #   @return [::Google::Cloud::Security::PrivateCA::V1::CertificateExtensionConstraints]
            #     Optional. Describes the set of X.509 extensions that may appear in a
            #     {::Google::Cloud::Security::PrivateCA::V1::Certificate Certificate} issued through this {::Google::Cloud::Security::PrivateCA::V1::CaPool CaPool}. If a certificate request
            #     sets extensions that don't appear in the {::Google::Cloud::Security::PrivateCA::V1::CaPool::IssuancePolicy#passthrough_extensions passthrough_extensions},
            #     those extensions will be dropped. If a certificate request uses a
            #     {::Google::Cloud::Security::PrivateCA::V1::CertificateTemplate CertificateTemplate} with
            #     {::Google::Cloud::Security::PrivateCA::V1::CertificateTemplate#predefined_values predefined_values} that don't
            #     appear here, the certificate issuance request will fail. If this is
            #     omitted, then this {::Google::Cloud::Security::PrivateCA::V1::CaPool CaPool} will not add restrictions on a
            #     certificate's X.509 extensions. These constraints do not apply to X.509
            #     extensions set in this {::Google::Cloud::Security::PrivateCA::V1::CaPool CaPool}'s {::Google::Cloud::Security::PrivateCA::V1::CaPool::IssuancePolicy#baseline_values baseline_values}.
            class IssuancePolicy
              include ::Google::Protobuf::MessageExts
              extend ::Google::Protobuf::MessageExts::ClassMethods

              # Describes a "type" of key that may be used in a {::Google::Cloud::Security::PrivateCA::V1::Certificate Certificate} issued
              # from a {::Google::Cloud::Security::PrivateCA::V1::CaPool CaPool}.
              # Note that a single {::Google::Cloud::Security::PrivateCA::V1::CaPool::IssuancePolicy::AllowedKeyType AllowedKeyType} may refer to either a
              # fully-qualified key algorithm, such as RSA 4096, or a family of key
              # algorithms, such as any RSA key.
              # @!attribute [rw] rsa
              #   @return [::Google::Cloud::Security::PrivateCA::V1::CaPool::IssuancePolicy::AllowedKeyType::RsaKeyType]
              #     Represents an allowed RSA key type.
              # @!attribute [rw] elliptic_curve
              #   @return [::Google::Cloud::Security::PrivateCA::V1::CaPool::IssuancePolicy::AllowedKeyType::EcKeyType]
              #     Represents an allowed Elliptic Curve key type.
              class AllowedKeyType
                include ::Google::Protobuf::MessageExts
                extend ::Google::Protobuf::MessageExts::ClassMethods

                # Describes an RSA key that may be used in a {::Google::Cloud::Security::PrivateCA::V1::Certificate Certificate} issued from
                # a {::Google::Cloud::Security::PrivateCA::V1::CaPool CaPool}.
                # @!attribute [rw] min_modulus_size
                #   @return [::Integer]
                #     Optional. The minimum allowed RSA modulus size (inclusive), in bits. If this is
                #     not set, or if set to zero, the service-level min RSA modulus size
                #     will continue to apply.
                # @!attribute [rw] max_modulus_size
                #   @return [::Integer]
                #     Optional. The maximum allowed RSA modulus size (inclusive), in bits. If this is
                #     not set, or if set to zero, the service will not enforce an explicit
                #     upper bound on RSA modulus sizes.
                class RsaKeyType
                  include ::Google::Protobuf::MessageExts
                  extend ::Google::Protobuf::MessageExts::ClassMethods
                end

                # Describes an Elliptic Curve key that may be used in a {::Google::Cloud::Security::PrivateCA::V1::Certificate Certificate}
                # issued from a {::Google::Cloud::Security::PrivateCA::V1::CaPool CaPool}.
                # @!attribute [rw] signature_algorithm
                #   @return [::Google::Cloud::Security::PrivateCA::V1::CaPool::IssuancePolicy::AllowedKeyType::EcKeyType::EcSignatureAlgorithm]
                #     Optional. A signature algorithm that must be used. If this is omitted, any
                #     EC-based signature algorithm will be allowed.
                class EcKeyType
                  include ::Google::Protobuf::MessageExts
                  extend ::Google::Protobuf::MessageExts::ClassMethods

                  # Describes an elliptic curve-based signature algorithm that may be
                  # used in a {::Google::Cloud::Security::PrivateCA::V1::Certificate Certificate} issued from a {::Google::Cloud::Security::PrivateCA::V1::CaPool CaPool}.
                  module EcSignatureAlgorithm
                    # Not specified. Signifies that any signature algorithm may be used.
                    EC_SIGNATURE_ALGORITHM_UNSPECIFIED = 0

                    # Refers to the Elliptic Curve Digital Signature Algorithm over the
                    # NIST P-256 curve.
                    ECDSA_P256 = 1

                    # Refers to the Elliptic Curve Digital Signature Algorithm over the
                    # NIST P-384 curve.
                    ECDSA_P384 = 2

                    # Refers to the Edwards-curve Digital Signature Algorithm over curve
                    # 25519, as described in RFC 8410.
                    EDDSA_25519 = 3
                  end
                end
              end

              # {::Google::Cloud::Security::PrivateCA::V1::CaPool::IssuancePolicy::IssuanceModes IssuanceModes} specifies the allowed ways in which
              # {::Google::Cloud::Security::PrivateCA::V1::Certificate Certificates} may be requested from this
              # {::Google::Cloud::Security::PrivateCA::V1::CaPool CaPool}.
              # @!attribute [rw] allow_csr_based_issuance
              #   @return [::Boolean]
              #     Optional. When true, allows callers to create {::Google::Cloud::Security::PrivateCA::V1::Certificate Certificates} by
              #     specifying a CSR.
              # @!attribute [rw] allow_config_based_issuance
              #   @return [::Boolean]
              #     Optional. When true, allows callers to create {::Google::Cloud::Security::PrivateCA::V1::Certificate Certificates} by
              #     specifying a {::Google::Cloud::Security::PrivateCA::V1::CertificateConfig CertificateConfig}.
              class IssuanceModes
                include ::Google::Protobuf::MessageExts
                extend ::Google::Protobuf::MessageExts::ClassMethods
              end
            end

            # @!attribute [rw] key
            #   @return [::String]
            # @!attribute [rw] value
            #   @return [::String]
            class LabelsEntry
              include ::Google::Protobuf::MessageExts
              extend ::Google::Protobuf::MessageExts::ClassMethods
            end

            # The tier of a {::Google::Cloud::Security::PrivateCA::V1::CaPool CaPool}, indicating its supported functionality and/or
            # billing SKU.
            module Tier
              # Not specified.
              TIER_UNSPECIFIED = 0

              # Enterprise tier.
              ENTERPRISE = 1

              # DevOps tier.
              DEVOPS = 2
            end
          end

          # A {::Google::Cloud::Security::PrivateCA::V1::CertificateRevocationList CertificateRevocationList} corresponds to a signed X.509 certificate
          # Revocation List (CRL). A CRL contains the serial numbers of certificates that
          # should no longer be trusted.
          # @!attribute [r] name
          #   @return [::String]
          #     Output only. The resource name for this {::Google::Cloud::Security::PrivateCA::V1::CertificateRevocationList CertificateRevocationList} in
          #     the format
          #     `projects/*/locations/*/caPools/*certificateAuthorities/*/
          #        certificateRevocationLists/*`.
          # @!attribute [r] sequence_number
          #   @return [::Integer]
          #     Output only. The CRL sequence number that appears in pem_crl.
          # @!attribute [r] revoked_certificates
          #   @return [::Array<::Google::Cloud::Security::PrivateCA::V1::CertificateRevocationList::RevokedCertificate>]
          #     Output only. The revoked serial numbers that appear in pem_crl.
          # @!attribute [r] pem_crl
          #   @return [::String]
          #     Output only. The PEM-encoded X.509 CRL.
          # @!attribute [r] access_url
          #   @return [::String]
          #     Output only. The location where 'pem_crl' can be accessed.
          # @!attribute [r] state
          #   @return [::Google::Cloud::Security::PrivateCA::V1::CertificateRevocationList::State]
          #     Output only. The {::Google::Cloud::Security::PrivateCA::V1::CertificateRevocationList::State State} for this {::Google::Cloud::Security::PrivateCA::V1::CertificateRevocationList CertificateRevocationList}.
          # @!attribute [r] create_time
          #   @return [::Google::Protobuf::Timestamp]
          #     Output only. The time at which this {::Google::Cloud::Security::PrivateCA::V1::CertificateRevocationList CertificateRevocationList} was created.
          # @!attribute [r] update_time
          #   @return [::Google::Protobuf::Timestamp]
          #     Output only. The time at which this {::Google::Cloud::Security::PrivateCA::V1::CertificateRevocationList CertificateRevocationList} was updated.
          # @!attribute [r] revision_id
          #   @return [::String]
          #     Output only. The revision ID of this {::Google::Cloud::Security::PrivateCA::V1::CertificateRevocationList CertificateRevocationList}. A new revision is
          #     committed whenever a new CRL is published. The format is an 8-character
          #     hexadecimal string.
          # @!attribute [rw] labels
          #   @return [::Google::Protobuf::Map{::String => ::String}]
          #     Optional. Labels with user-defined metadata.
          class CertificateRevocationList
            include ::Google::Protobuf::MessageExts
            extend ::Google::Protobuf::MessageExts::ClassMethods

            # Describes a revoked {::Google::Cloud::Security::PrivateCA::V1::Certificate Certificate}.
            # @!attribute [rw] certificate
            #   @return [::String]
            #     The resource name for the {::Google::Cloud::Security::PrivateCA::V1::Certificate Certificate} in the format
            #     `projects/*/locations/*/caPools/*/certificates/*`.
            # @!attribute [rw] hex_serial_number
            #   @return [::String]
            #     The serial number of the {::Google::Cloud::Security::PrivateCA::V1::Certificate Certificate}.
            # @!attribute [rw] revocation_reason
            #   @return [::Google::Cloud::Security::PrivateCA::V1::RevocationReason]
            #     The reason the {::Google::Cloud::Security::PrivateCA::V1::Certificate Certificate} was revoked.
            class RevokedCertificate
              include ::Google::Protobuf::MessageExts
              extend ::Google::Protobuf::MessageExts::ClassMethods
            end

            # @!attribute [rw] key
            #   @return [::String]
            # @!attribute [rw] value
            #   @return [::String]
            class LabelsEntry
              include ::Google::Protobuf::MessageExts
              extend ::Google::Protobuf::MessageExts::ClassMethods
            end

            # The state of a {::Google::Cloud::Security::PrivateCA::V1::CertificateRevocationList CertificateRevocationList}, indicating if it is current.
            module State
              # Not specified.
              STATE_UNSPECIFIED = 0

              # The {::Google::Cloud::Security::PrivateCA::V1::CertificateRevocationList CertificateRevocationList} is up to date.
              ACTIVE = 1

              # The {::Google::Cloud::Security::PrivateCA::V1::CertificateRevocationList CertificateRevocationList} is no longer current.
              SUPERSEDED = 2
            end
          end

          # A {::Google::Cloud::Security::PrivateCA::V1::Certificate Certificate} corresponds to a signed X.509 certificate issued by a
          # {::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority CertificateAuthority}.
          # @!attribute [r] name
          #   @return [::String]
          #     Output only. The resource name for this {::Google::Cloud::Security::PrivateCA::V1::Certificate Certificate} in the format
          #     `projects/*/locations/*/caPools/*/certificates/*`.
          # @!attribute [rw] pem_csr
          #   @return [::String]
          #     Immutable. A pem-encoded X.509 certificate signing request (CSR).
          # @!attribute [rw] config
          #   @return [::Google::Cloud::Security::PrivateCA::V1::CertificateConfig]
          #     Immutable. A description of the certificate and key that does not require X.509 or
          #     ASN.1.
          # @!attribute [r] issuer_certificate_authority
          #   @return [::String]
          #     Output only. The resource name of the issuing {::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority CertificateAuthority} in the format
          #     `projects/*/locations/*/caPools/*/certificateAuthorities/*`.
          # @!attribute [rw] lifetime
          #   @return [::Google::Protobuf::Duration]
          #     Required. Immutable. The desired lifetime of a certificate. Used to create the
          #     "not_before_time" and "not_after_time" fields inside an X.509
          #     certificate. Note that the lifetime may be truncated if it would extend
          #     past the life of any certificate authority in the issuing chain.
          # @!attribute [rw] certificate_template
          #   @return [::String]
          #     Immutable. The resource name for a {::Google::Cloud::Security::PrivateCA::V1::CertificateTemplate CertificateTemplate} used to issue this
          #     certificate, in the format
          #     `projects/*/locations/*/certificateTemplates/*`.
          #     If this is specified, the caller must have the necessary permission to
          #     use this template. If this is omitted, no template will be used.
          #     This template must be in the same location as the {::Google::Cloud::Security::PrivateCA::V1::Certificate Certificate}.
          # @!attribute [rw] subject_mode
          #   @return [::Google::Cloud::Security::PrivateCA::V1::SubjectRequestMode]
          #     Immutable. Specifies how the {::Google::Cloud::Security::PrivateCA::V1::Certificate Certificate}'s identity fields are to be decided.
          #     If this is omitted, the `DEFAULT` subject mode will be used.
          # @!attribute [r] revocation_details
          #   @return [::Google::Cloud::Security::PrivateCA::V1::Certificate::RevocationDetails]
          #     Output only. Details regarding the revocation of this {::Google::Cloud::Security::PrivateCA::V1::Certificate Certificate}. This
          #     {::Google::Cloud::Security::PrivateCA::V1::Certificate Certificate} is considered revoked if and only if this field is present.
          # @!attribute [r] pem_certificate
          #   @return [::String]
          #     Output only. The pem-encoded, signed X.509 certificate.
          # @!attribute [r] certificate_description
          #   @return [::Google::Cloud::Security::PrivateCA::V1::CertificateDescription]
          #     Output only. A structured description of the issued X.509 certificate.
          # @!attribute [r] pem_certificate_chain
          #   @return [::Array<::String>]
          #     Output only. The chain that may be used to verify the X.509 certificate. Expected to be
          #     in issuer-to-root order according to RFC 5246.
          # @!attribute [r] create_time
          #   @return [::Google::Protobuf::Timestamp]
          #     Output only. The time at which this {::Google::Cloud::Security::PrivateCA::V1::Certificate Certificate} was created.
          # @!attribute [r] update_time
          #   @return [::Google::Protobuf::Timestamp]
          #     Output only. The time at which this {::Google::Cloud::Security::PrivateCA::V1::Certificate Certificate} was updated.
          # @!attribute [rw] labels
          #   @return [::Google::Protobuf::Map{::String => ::String}]
          #     Optional. Labels with user-defined metadata.
          class Certificate
            include ::Google::Protobuf::MessageExts
            extend ::Google::Protobuf::MessageExts::ClassMethods

            # Describes fields that are relavent to the revocation of a {::Google::Cloud::Security::PrivateCA::V1::Certificate Certificate}.
            # @!attribute [rw] revocation_state
            #   @return [::Google::Cloud::Security::PrivateCA::V1::RevocationReason]
            #     Indicates why a {::Google::Cloud::Security::PrivateCA::V1::Certificate Certificate} was revoked.
            # @!attribute [rw] revocation_time
            #   @return [::Google::Protobuf::Timestamp]
            #     The time at which this {::Google::Cloud::Security::PrivateCA::V1::Certificate Certificate} was revoked.
            class RevocationDetails
              include ::Google::Protobuf::MessageExts
              extend ::Google::Protobuf::MessageExts::ClassMethods
            end

            # @!attribute [rw] key
            #   @return [::String]
            # @!attribute [rw] value
            #   @return [::String]
            class LabelsEntry
              include ::Google::Protobuf::MessageExts
              extend ::Google::Protobuf::MessageExts::ClassMethods
            end
          end

          # A {::Google::Cloud::Security::PrivateCA::V1::CertificateTemplate CertificateTemplate} refers to a managed template for certificate
          # issuance.
          # @!attribute [r] name
          #   @return [::String]
          #     Output only. The resource name for this {::Google::Cloud::Security::PrivateCA::V1::CertificateTemplate CertificateTemplate} in the format
          #     `projects/*/locations/*/certificateTemplates/*`.
          # @!attribute [rw] predefined_values
          #   @return [::Google::Cloud::Security::PrivateCA::V1::X509Parameters]
          #     Optional. A set of X.509 values that will be applied to all issued certificates that
          #     use this template. If the certificate request includes conflicting values
          #     for the same properties, they will be overwritten by the values defined
          #     here. If the issuing {::Google::Cloud::Security::PrivateCA::V1::CaPool CaPool}'s {::Google::Cloud::Security::PrivateCA::V1::CaPool::IssuancePolicy IssuancePolicy}
          #     defines conflicting
          #     {::Google::Cloud::Security::PrivateCA::V1::CaPool::IssuancePolicy#baseline_values baseline_values} for the same
          #     properties, the certificate issuance request will fail.
          # @!attribute [rw] identity_constraints
          #   @return [::Google::Cloud::Security::PrivateCA::V1::CertificateIdentityConstraints]
          #     Optional. Describes constraints on identities that may be appear in
          #     {::Google::Cloud::Security::PrivateCA::V1::Certificate Certificates} issued using this template. If this is omitted,
          #     then this template will not add restrictions on a certificate's identity.
          # @!attribute [rw] passthrough_extensions
          #   @return [::Google::Cloud::Security::PrivateCA::V1::CertificateExtensionConstraints]
          #     Optional. Describes the set of X.509 extensions that may appear in a
          #     {::Google::Cloud::Security::PrivateCA::V1::Certificate Certificate} issued using this {::Google::Cloud::Security::PrivateCA::V1::CertificateTemplate CertificateTemplate}. If a certificate
          #     request sets extensions that don't appear in the
          #     {::Google::Cloud::Security::PrivateCA::V1::CertificateTemplate#passthrough_extensions passthrough_extensions}, those extensions will be dropped. If the
          #     issuing {::Google::Cloud::Security::PrivateCA::V1::CaPool CaPool}'s {::Google::Cloud::Security::PrivateCA::V1::CaPool::IssuancePolicy IssuancePolicy} defines
          #     {::Google::Cloud::Security::PrivateCA::V1::CaPool::IssuancePolicy#baseline_values baseline_values} that don't appear
          #     here, the certificate issuance request will fail. If this is omitted, then
          #     this template will not add restrictions on a certificate's X.509
          #     extensions. These constraints do not apply to X.509 extensions set in this
          #     {::Google::Cloud::Security::PrivateCA::V1::CertificateTemplate CertificateTemplate}'s {::Google::Cloud::Security::PrivateCA::V1::CertificateTemplate#predefined_values predefined_values}.
          # @!attribute [rw] description
          #   @return [::String]
          #     Optional. A human-readable description of scenarios this template is intended for.
          # @!attribute [r] create_time
          #   @return [::Google::Protobuf::Timestamp]
          #     Output only. The time at which this {::Google::Cloud::Security::PrivateCA::V1::CertificateTemplate CertificateTemplate} was created.
          # @!attribute [r] update_time
          #   @return [::Google::Protobuf::Timestamp]
          #     Output only. The time at which this {::Google::Cloud::Security::PrivateCA::V1::CertificateTemplate CertificateTemplate} was updated.
          # @!attribute [rw] labels
          #   @return [::Google::Protobuf::Map{::String => ::String}]
          #     Optional. Labels with user-defined metadata.
          class CertificateTemplate
            include ::Google::Protobuf::MessageExts
            extend ::Google::Protobuf::MessageExts::ClassMethods

            # @!attribute [rw] key
            #   @return [::String]
            # @!attribute [rw] value
            #   @return [::String]
            class LabelsEntry
              include ::Google::Protobuf::MessageExts
              extend ::Google::Protobuf::MessageExts::ClassMethods
            end
          end

          # An {::Google::Cloud::Security::PrivateCA::V1::X509Parameters X509Parameters} is used to describe certain fields of an
          # X.509 certificate, such as the key usage fields, fields specific to CA
          # certificates, certificate policy extensions and custom extensions.
          # @!attribute [rw] key_usage
          #   @return [::Google::Cloud::Security::PrivateCA::V1::KeyUsage]
          #     Optional. Indicates the intended use for keys that correspond to a certificate.
          # @!attribute [rw] ca_options
          #   @return [::Google::Cloud::Security::PrivateCA::V1::X509Parameters::CaOptions]
          #     Optional. Describes options in this {::Google::Cloud::Security::PrivateCA::V1::X509Parameters X509Parameters} that are relevant in a CA
          #     certificate.
          # @!attribute [rw] policy_ids
          #   @return [::Array<::Google::Cloud::Security::PrivateCA::V1::ObjectId>]
          #     Optional. Describes the X.509 certificate policy object identifiers, per
          #     https://tools.ietf.org/html/rfc5280#section-4.2.1.4.
          # @!attribute [rw] aia_ocsp_servers
          #   @return [::Array<::String>]
          #     Optional. Describes Online Certificate Status Protocol (OCSP) endpoint addresses
          #     that appear in the "Authority Information Access" extension in the
          #     certificate.
          # @!attribute [rw] additional_extensions
          #   @return [::Array<::Google::Cloud::Security::PrivateCA::V1::X509Extension>]
          #     Optional. Describes custom X.509 extensions.
          class X509Parameters
            include ::Google::Protobuf::MessageExts
            extend ::Google::Protobuf::MessageExts::ClassMethods

            # Describes values that are relevant in a CA certificate.
            # @!attribute [rw] is_ca
            #   @return [::Boolean]
            #     Optional. Refers to the "CA" X.509 extension, which is a boolean value. When this
            #     value is missing, the extension will be omitted from the CA certificate.
            # @!attribute [rw] max_issuer_path_length
            #   @return [::Integer]
            #     Optional. Refers to the path length restriction X.509 extension. For a CA
            #     certificate, this value describes the depth of subordinate CA
            #     certificates that are allowed.
            #     If this value is less than 0, the request will fail.
            #     If this value is missing, the max path length will be omitted from the
            #     CA certificate.
            class CaOptions
              include ::Google::Protobuf::MessageExts
              extend ::Google::Protobuf::MessageExts::ClassMethods
            end
          end

          # Describes a subordinate CA's issuers. This is either a resource name to a
          # known issuing {::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority CertificateAuthority}, or a PEM issuer certificate chain.
          # @!attribute [rw] certificate_authority
          #   @return [::String]
          #     Required. This can refer to a {::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority CertificateAuthority} that was used to create a
          #     subordinate {::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority CertificateAuthority}. This field is used for information
          #     and usability purposes only. The resource name is in the format
          #     `projects/*/locations/*/caPools/*/certificateAuthorities/*`.
          # @!attribute [rw] pem_issuer_chain
          #   @return [::Google::Cloud::Security::PrivateCA::V1::SubordinateConfig::SubordinateConfigChain]
          #     Required. Contains the PEM certificate chain for the issuers of this
          #     {::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority CertificateAuthority}, but not pem certificate for this CA itself.
          class SubordinateConfig
            include ::Google::Protobuf::MessageExts
            extend ::Google::Protobuf::MessageExts::ClassMethods

            # This message describes a subordinate CA's issuer certificate chain. This
            # wrapper exists for compatibility reasons.
            # @!attribute [rw] pem_certificates
            #   @return [::Array<::String>]
            #     Required. Expected to be in leaf-to-root order according to RFC 5246.
            class SubordinateConfigChain
              include ::Google::Protobuf::MessageExts
              extend ::Google::Protobuf::MessageExts::ClassMethods
            end
          end

          # A {::Google::Cloud::Security::PrivateCA::V1::PublicKey PublicKey} describes a public key.
          # @!attribute [rw] key
          #   @return [::String]
          #     Required. A public key. The padding and encoding
          #     must match with the `KeyFormat` value specified for the `format` field.
          # @!attribute [rw] format
          #   @return [::Google::Cloud::Security::PrivateCA::V1::PublicKey::KeyFormat]
          #     Required. The format of the public key.
          class PublicKey
            include ::Google::Protobuf::MessageExts
            extend ::Google::Protobuf::MessageExts::ClassMethods

            # Types of public keys formats that are supported. Currently, only `PEM`
            # format is supported.
            module KeyFormat
              # Default unspecified value.
              KEY_FORMAT_UNSPECIFIED = 0

              # The key is PEM-encoded as defined in [RFC
              # 7468](https://tools.ietf.org/html/rfc7468). It can be any of the
              # following: a PEM-encoded PKCS#1/RFC 3447 RSAPublicKey
              # structure, an RFC 5280
              # [SubjectPublicKeyInfo](https://tools.ietf.org/html/rfc5280#section-4.1)
              # or a PEM-encoded X.509 certificate signing request (CSR). If a
              # [SubjectPublicKeyInfo](https://tools.ietf.org/html/rfc5280#section-4.1)
              # is specified, it can contain a A PEM-encoded PKCS#1/RFC 3447 RSAPublicKey
              # or a NIST P-256/secp256r1/prime256v1 or P-384 key. If a CSR is specified,
              # it will used solely for the purpose of extracting the public key. When
              # generated by the service, it will always be an RFC 5280
              # [SubjectPublicKeyInfo](https://tools.ietf.org/html/rfc5280#section-4.1)
              # structure containing an algorithm identifier and a key.
              PEM = 1
            end
          end

          # A {::Google::Cloud::Security::PrivateCA::V1::CertificateConfig CertificateConfig} describes an X.509 certificate or CSR that is to be
          # created, as an alternative to using ASN.1.
          # @!attribute [rw] subject_config
          #   @return [::Google::Cloud::Security::PrivateCA::V1::CertificateConfig::SubjectConfig]
          #     Required. Specifies some of the values in a certificate that are related to the
          #     subject.
          # @!attribute [rw] x509_config
          #   @return [::Google::Cloud::Security::PrivateCA::V1::X509Parameters]
          #     Required. Describes how some of the technical X.509 fields in a certificate should be
          #     populated.
          # @!attribute [rw] public_key
          #   @return [::Google::Cloud::Security::PrivateCA::V1::PublicKey]
          #     Optional. The public key that corresponds to this config. This is, for example, used
          #     when issuing {::Google::Cloud::Security::PrivateCA::V1::Certificate Certificates}, but not when creating a
          #     self-signed {::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority CertificateAuthority} or {::Google::Cloud::Security::PrivateCA::V1::CertificateAuthority CertificateAuthority} CSR.
          class CertificateConfig
            include ::Google::Protobuf::MessageExts
            extend ::Google::Protobuf::MessageExts::ClassMethods

            # These values are used to create the distinguished name and subject
            # alternative name fields in an X.509 certificate.
            # @!attribute [rw] subject
            #   @return [::Google::Cloud::Security::PrivateCA::V1::Subject]
            #     Required. Contains distinguished name fields such as the common name, location and
            #     organization.
            # @!attribute [rw] subject_alt_name
            #   @return [::Google::Cloud::Security::PrivateCA::V1::SubjectAltNames]
            #     Optional. The subject alternative name fields.
            class SubjectConfig
              include ::Google::Protobuf::MessageExts
              extend ::Google::Protobuf::MessageExts::ClassMethods
            end
          end

          # A {::Google::Cloud::Security::PrivateCA::V1::CertificateDescription CertificateDescription} describes an X.509 certificate or CSR that has
          # been issued, as an alternative to using ASN.1 / X.509.
          # @!attribute [rw] subject_description
          #   @return [::Google::Cloud::Security::PrivateCA::V1::CertificateDescription::SubjectDescription]
          #     Describes some of the values in a certificate that are related to the
          #     subject and lifetime.
          # @!attribute [rw] x509_description
          #   @return [::Google::Cloud::Security::PrivateCA::V1::X509Parameters]
          #     Describes some of the technical X.509 fields in a certificate.
          # @!attribute [rw] public_key
          #   @return [::Google::Cloud::Security::PrivateCA::V1::PublicKey]
          #     The public key that corresponds to an issued certificate.
          # @!attribute [rw] subject_key_id
          #   @return [::Google::Cloud::Security::PrivateCA::V1::CertificateDescription::KeyId]
          #     Provides a means of identifiying certificates that contain a particular
          #     public key, per https://tools.ietf.org/html/rfc5280#section-4.2.1.2.
          # @!attribute [rw] authority_key_id
          #   @return [::Google::Cloud::Security::PrivateCA::V1::CertificateDescription::KeyId]
          #     Identifies the subject_key_id of the parent certificate, per
          #     https://tools.ietf.org/html/rfc5280#section-4.2.1.1
          # @!attribute [rw] crl_distribution_points
          #   @return [::Array<::String>]
          #     Describes a list of locations to obtain CRL information, i.e.
          #     the DistributionPoint.fullName described by
          #     https://tools.ietf.org/html/rfc5280#section-4.2.1.13
          # @!attribute [rw] aia_issuing_certificate_urls
          #   @return [::Array<::String>]
          #     Describes lists of issuer CA certificate URLs that appear in the
          #     "Authority Information Access" extension in the certificate.
          # @!attribute [rw] cert_fingerprint
          #   @return [::Google::Cloud::Security::PrivateCA::V1::CertificateDescription::CertificateFingerprint]
          #     The hash of the x.509 certificate.
          class CertificateDescription
            include ::Google::Protobuf::MessageExts
            extend ::Google::Protobuf::MessageExts::ClassMethods

            # These values describe fields in an issued X.509 certificate such as the
            # distinguished name, subject alternative names, serial number, and lifetime.
            # @!attribute [rw] subject
            #   @return [::Google::Cloud::Security::PrivateCA::V1::Subject]
            #     Contains distinguished name fields such as the common name, location and
            #     / organization.
            # @!attribute [rw] subject_alt_name
            #   @return [::Google::Cloud::Security::PrivateCA::V1::SubjectAltNames]
            #     The subject alternative name fields.
            # @!attribute [rw] hex_serial_number
            #   @return [::String]
            #     The serial number encoded in lowercase hexadecimal.
            # @!attribute [rw] lifetime
            #   @return [::Google::Protobuf::Duration]
            #     For convenience, the actual lifetime of an issued certificate.
            # @!attribute [rw] not_before_time
            #   @return [::Google::Protobuf::Timestamp]
            #     The time at which the certificate becomes valid.
            # @!attribute [rw] not_after_time
            #   @return [::Google::Protobuf::Timestamp]
            #     The time after which the certificate is expired.
            #     Per RFC 5280, the validity period for a certificate is the period of time
            #     from not_before_time through not_after_time, inclusive.
            #     Corresponds to 'not_before_time' + 'lifetime' - 1 second.
            class SubjectDescription
              include ::Google::Protobuf::MessageExts
              extend ::Google::Protobuf::MessageExts::ClassMethods
            end

            # A KeyId identifies a specific public key, usually by hashing the public
            # key.
            # @!attribute [rw] key_id
            #   @return [::String]
            #     Optional. The value of this KeyId encoded in lowercase hexadecimal. This is most
            #     likely the 160 bit SHA-1 hash of the public key.
            class KeyId
              include ::Google::Protobuf::MessageExts
              extend ::Google::Protobuf::MessageExts::ClassMethods
            end

            # A group of fingerprints for the x509 certificate.
            # @!attribute [rw] sha256_hash
            #   @return [::String]
            #     The SHA 256 hash, encoded in hexadecimal, of the DER x509 certificate.
            class CertificateFingerprint
              include ::Google::Protobuf::MessageExts
              extend ::Google::Protobuf::MessageExts::ClassMethods
            end
          end

          # An {::Google::Cloud::Security::PrivateCA::V1::ObjectId ObjectId} specifies an object identifier (OID). These provide context
          # and describe types in ASN.1 messages.
          # @!attribute [rw] object_id_path
          #   @return [::Array<::Integer>]
          #     Required. The parts of an OID path. The most significant parts of the path come
          #     first.
          class ObjectId
            include ::Google::Protobuf::MessageExts
            extend ::Google::Protobuf::MessageExts::ClassMethods
          end

          # An {::Google::Cloud::Security::PrivateCA::V1::X509Extension X509Extension} specifies an X.509 extension, which may be used in
          # different parts of X.509 objects like certificates, CSRs, and CRLs.
          # @!attribute [rw] object_id
          #   @return [::Google::Cloud::Security::PrivateCA::V1::ObjectId]
          #     Required. The OID for this X.509 extension.
          # @!attribute [rw] critical
          #   @return [::Boolean]
          #     Optional. Indicates whether or not this extension is critical (i.e., if the client
          #     does not know how to handle this extension, the client should consider this
          #     to be an error).
          # @!attribute [rw] value
          #   @return [::String]
          #     Required. The value of this X.509 extension.
          class X509Extension
            include ::Google::Protobuf::MessageExts
            extend ::Google::Protobuf::MessageExts::ClassMethods
          end

          # A {::Google::Cloud::Security::PrivateCA::V1::KeyUsage KeyUsage} describes key usage values that may appear in an X.509
          # certificate.
          # @!attribute [rw] base_key_usage
          #   @return [::Google::Cloud::Security::PrivateCA::V1::KeyUsage::KeyUsageOptions]
          #     Describes high-level ways in which a key may be used.
          # @!attribute [rw] extended_key_usage
          #   @return [::Google::Cloud::Security::PrivateCA::V1::KeyUsage::ExtendedKeyUsageOptions]
          #     Detailed scenarios in which a key may be used.
          # @!attribute [rw] unknown_extended_key_usages
          #   @return [::Array<::Google::Cloud::Security::PrivateCA::V1::ObjectId>]
          #     Used to describe extended key usages that are not listed in the
          #     {::Google::Cloud::Security::PrivateCA::V1::KeyUsage::ExtendedKeyUsageOptions KeyUsage.ExtendedKeyUsageOptions} message.
          class KeyUsage
            include ::Google::Protobuf::MessageExts
            extend ::Google::Protobuf::MessageExts::ClassMethods

            # {::Google::Cloud::Security::PrivateCA::V1::KeyUsage::KeyUsageOptions KeyUsage.KeyUsageOptions} corresponds to the key usage values
            # described in https://tools.ietf.org/html/rfc5280#section-4.2.1.3.
            # @!attribute [rw] digital_signature
            #   @return [::Boolean]
            #     The key may be used for digital signatures.
            # @!attribute [rw] content_commitment
            #   @return [::Boolean]
            #     The key may be used for cryptographic commitments. Note that this may
            #     also be referred to as "non-repudiation".
            # @!attribute [rw] key_encipherment
            #   @return [::Boolean]
            #     The key may be used to encipher other keys.
            # @!attribute [rw] data_encipherment
            #   @return [::Boolean]
            #     The key may be used to encipher data.
            # @!attribute [rw] key_agreement
            #   @return [::Boolean]
            #     The key may be used in a key agreement protocol.
            # @!attribute [rw] cert_sign
            #   @return [::Boolean]
            #     The key may be used to sign certificates.
            # @!attribute [rw] crl_sign
            #   @return [::Boolean]
            #     The key may be used sign certificate revocation lists.
            # @!attribute [rw] encipher_only
            #   @return [::Boolean]
            #     The key may be used to encipher only.
            # @!attribute [rw] decipher_only
            #   @return [::Boolean]
            #     The key may be used to decipher only.
            class KeyUsageOptions
              include ::Google::Protobuf::MessageExts
              extend ::Google::Protobuf::MessageExts::ClassMethods
            end

            # {::Google::Cloud::Security::PrivateCA::V1::KeyUsage::ExtendedKeyUsageOptions KeyUsage.ExtendedKeyUsageOptions} has fields that correspond to
            # certain common OIDs that could be specified as an extended key usage value.
            # @!attribute [rw] server_auth
            #   @return [::Boolean]
            #     Corresponds to OID 1.3.6.1.5.5.7.3.1. Officially described as "TLS WWW
            #     server authentication", though regularly used for non-WWW TLS.
            # @!attribute [rw] client_auth
            #   @return [::Boolean]
            #     Corresponds to OID 1.3.6.1.5.5.7.3.2. Officially described as "TLS WWW
            #     client authentication", though regularly used for non-WWW TLS.
            # @!attribute [rw] code_signing
            #   @return [::Boolean]
            #     Corresponds to OID 1.3.6.1.5.5.7.3.3. Officially described as "Signing of
            #     downloadable executable code client authentication".
            # @!attribute [rw] email_protection
            #   @return [::Boolean]
            #     Corresponds to OID 1.3.6.1.5.5.7.3.4. Officially described as "Email
            #     protection".
            # @!attribute [rw] time_stamping
            #   @return [::Boolean]
            #     Corresponds to OID 1.3.6.1.5.5.7.3.8. Officially described as "Binding
            #     the hash of an object to a time".
            # @!attribute [rw] ocsp_signing
            #   @return [::Boolean]
            #     Corresponds to OID 1.3.6.1.5.5.7.3.9. Officially described as "Signing
            #     OCSP responses".
            class ExtendedKeyUsageOptions
              include ::Google::Protobuf::MessageExts
              extend ::Google::Protobuf::MessageExts::ClassMethods
            end
          end

          # {::Google::Cloud::Security::PrivateCA::V1::Subject Subject} describes parts of a distinguished name that, in turn,
          # describes the subject of the certificate.
          # @!attribute [rw] common_name
          #   @return [::String]
          #     The "common name" of the subject.
          # @!attribute [rw] country_code
          #   @return [::String]
          #     The country code of the subject.
          # @!attribute [rw] organization
          #   @return [::String]
          #     The organization of the subject.
          # @!attribute [rw] organizational_unit
          #   @return [::String]
          #     The organizational_unit of the subject.
          # @!attribute [rw] locality
          #   @return [::String]
          #     The locality or city of the subject.
          # @!attribute [rw] province
          #   @return [::String]
          #     The province, territory, or regional state of the subject.
          # @!attribute [rw] street_address
          #   @return [::String]
          #     The street address of the subject.
          # @!attribute [rw] postal_code
          #   @return [::String]
          #     The postal code of the subject.
          class Subject
            include ::Google::Protobuf::MessageExts
            extend ::Google::Protobuf::MessageExts::ClassMethods
          end

          # {::Google::Cloud::Security::PrivateCA::V1::SubjectAltNames SubjectAltNames} corresponds to a more modern way of listing what
          # the asserted identity is in a certificate (i.e., compared to the "common
          # name" in the distinguished name).
          # @!attribute [rw] dns_names
          #   @return [::Array<::String>]
          #     Contains only valid, fully-qualified host names.
          # @!attribute [rw] uris
          #   @return [::Array<::String>]
          #     Contains only valid RFC 3986 URIs.
          # @!attribute [rw] email_addresses
          #   @return [::Array<::String>]
          #     Contains only valid RFC 2822 E-mail addresses.
          # @!attribute [rw] ip_addresses
          #   @return [::Array<::String>]
          #     Contains only valid 32-bit IPv4 addresses or RFC 4291 IPv6 addresses.
          # @!attribute [rw] custom_sans
          #   @return [::Array<::Google::Cloud::Security::PrivateCA::V1::X509Extension>]
          #     Contains additional subject alternative name values.
          #     For each custom_san, the `value` field must contain an ASN.1 encoded
          #     UTF8String.
          class SubjectAltNames
            include ::Google::Protobuf::MessageExts
            extend ::Google::Protobuf::MessageExts::ClassMethods
          end

          # Describes constraints on a {::Google::Cloud::Security::PrivateCA::V1::Certificate Certificate}'s {::Google::Cloud::Security::PrivateCA::V1::Subject Subject} and
          # {::Google::Cloud::Security::PrivateCA::V1::SubjectAltNames SubjectAltNames}.
          # @!attribute [rw] cel_expression
          #   @return [::Google::Type::Expr]
          #     Optional. A CEL expression that may be used to validate the resolved X.509 Subject
          #     and/or Subject Alternative Name before a certificate is signed.
          #     To see the full allowed syntax and some examples, see
          #     https://cloud.google.com/certificate-authority-service/docs/using-cel
          # @!attribute [rw] allow_subject_passthrough
          #   @return [::Boolean]
          #     Required. If this is true, the {::Google::Cloud::Security::PrivateCA::V1::Subject Subject} field may be copied from a certificate
          #     request into the signed certificate. Otherwise, the requested {::Google::Cloud::Security::PrivateCA::V1::Subject Subject}
          #     will be discarded.
          # @!attribute [rw] allow_subject_alt_names_passthrough
          #   @return [::Boolean]
          #     Required. If this is true, the {::Google::Cloud::Security::PrivateCA::V1::SubjectAltNames SubjectAltNames} extension may be copied from a
          #     certificate request into the signed certificate. Otherwise, the requested
          #     {::Google::Cloud::Security::PrivateCA::V1::SubjectAltNames SubjectAltNames} will be discarded.
          class CertificateIdentityConstraints
            include ::Google::Protobuf::MessageExts
            extend ::Google::Protobuf::MessageExts::ClassMethods
          end

          # Describes a set of X.509 extensions that may be part of some certificate
          # issuance controls.
          # @!attribute [rw] known_extensions
          #   @return [::Array<::Google::Cloud::Security::PrivateCA::V1::CertificateExtensionConstraints::KnownCertificateExtension>]
          #     Optional. A set of named X.509 extensions. Will be combined with
          #     {::Google::Cloud::Security::PrivateCA::V1::CertificateExtensionConstraints#additional_extensions additional_extensions} to determine the full set of X.509 extensions.
          # @!attribute [rw] additional_extensions
          #   @return [::Array<::Google::Cloud::Security::PrivateCA::V1::ObjectId>]
          #     Optional. A set of {::Google::Cloud::Security::PrivateCA::V1::ObjectId ObjectIds} identifying custom X.509 extensions.
          #     Will be combined with {::Google::Cloud::Security::PrivateCA::V1::CertificateExtensionConstraints#known_extensions known_extensions} to determine the full set of
          #     X.509 extensions.
          class CertificateExtensionConstraints
            include ::Google::Protobuf::MessageExts
            extend ::Google::Protobuf::MessageExts::ClassMethods

            # Describes well-known X.509 extensions that can appear in a {::Google::Cloud::Security::PrivateCA::V1::Certificate Certificate},
            # not including the {::Google::Cloud::Security::PrivateCA::V1::SubjectAltNames SubjectAltNames} extension.
            module KnownCertificateExtension
              # Not specified.
              KNOWN_CERTIFICATE_EXTENSION_UNSPECIFIED = 0

              # Refers to a certificate's Key Usage extension, as described in [RFC 5280
              # section 4.2.1.3](https://tools.ietf.org/html/rfc5280#section-4.2.1.3).
              # This corresponds to the {::Google::Cloud::Security::PrivateCA::V1::KeyUsage#base_key_usage KeyUsage.base_key_usage} field.
              BASE_KEY_USAGE = 1

              # Refers to a certificate's Extended Key Usage extension, as described in
              # [RFC 5280
              # section 4.2.1.12](https://tools.ietf.org/html/rfc5280#section-4.2.1.12).
              # This corresponds to the {::Google::Cloud::Security::PrivateCA::V1::KeyUsage#extended_key_usage KeyUsage.extended_key_usage} message.
              EXTENDED_KEY_USAGE = 2

              # Refers to a certificate's Basic Constraints extension, as described in
              # [RFC 5280
              # section 4.2.1.9](https://tools.ietf.org/html/rfc5280#section-4.2.1.9).
              # This corresponds to the {::Google::Cloud::Security::PrivateCA::V1::X509Parameters#ca_options X509Parameters.ca_options} field.
              CA_OPTIONS = 3

              # Refers to a certificate's Policy object identifiers, as described in
              # [RFC 5280
              # section 4.2.1.4](https://tools.ietf.org/html/rfc5280#section-4.2.1.4).
              # This corresponds to the {::Google::Cloud::Security::PrivateCA::V1::X509Parameters#policy_ids X509Parameters.policy_ids} field.
              POLICY_IDS = 4

              # Refers to OCSP servers in a certificate's Authority Information Access
              # extension, as described in
              # [RFC 5280
              # section 4.2.2.1](https://tools.ietf.org/html/rfc5280#section-4.2.2.1),
              # This corresponds to the {::Google::Cloud::Security::PrivateCA::V1::X509Parameters#aia_ocsp_servers X509Parameters.aia_ocsp_servers} field.
              AIA_OCSP_SERVERS = 5
            end
          end

          # A {::Google::Cloud::Security::PrivateCA::V1::RevocationReason RevocationReason} indicates whether a {::Google::Cloud::Security::PrivateCA::V1::Certificate Certificate} has been revoked,
          # and the reason for revocation. These correspond to standard revocation
          # reasons from RFC 5280. Note that the enum labels and values in this
          # definition are not the same ASN.1 values defined in RFC 5280. These values
          # will be translated to the correct ASN.1 values when a CRL is created.
          module RevocationReason
            # Default unspecified value. This value does indicate that a {::Google::Cloud::Security::PrivateCA::V1::Certificate Certificate}
            # has been revoked, but that a reason has not been recorded.
            REVOCATION_REASON_UNSPECIFIED = 0

            # Key material for this {::Google::Cloud::Security::PrivateCA::V1::Certificate Certificate} may have leaked.
            KEY_COMPROMISE = 1

            # The key material for a certificate authority in the issuing path may have
            # leaked.
            CERTIFICATE_AUTHORITY_COMPROMISE = 2

            # The subject or other attributes in this {::Google::Cloud::Security::PrivateCA::V1::Certificate Certificate} have changed.
            AFFILIATION_CHANGED = 3

            # This {::Google::Cloud::Security::PrivateCA::V1::Certificate Certificate} has been superseded.
            SUPERSEDED = 4

            # This {::Google::Cloud::Security::PrivateCA::V1::Certificate Certificate} or entities in the issuing path have ceased to
            # operate.
            CESSATION_OF_OPERATION = 5

            # This {::Google::Cloud::Security::PrivateCA::V1::Certificate Certificate} should not be considered valid, it is expected that it
            # may become valid in the future.
            CERTIFICATE_HOLD = 6

            # This {::Google::Cloud::Security::PrivateCA::V1::Certificate Certificate} no longer has permission to assert the listed
            # attributes.
            PRIVILEGE_WITHDRAWN = 7

            # The authority which determines appropriate attributes for a {::Google::Cloud::Security::PrivateCA::V1::Certificate Certificate}
            # may have been compromised.
            ATTRIBUTE_AUTHORITY_COMPROMISE = 8
          end

          # Describes the way in which a {::Google::Cloud::Security::PrivateCA::V1::Certificate Certificate}'s {::Google::Cloud::Security::PrivateCA::V1::Subject Subject} and/or
          # {::Google::Cloud::Security::PrivateCA::V1::SubjectAltNames SubjectAltNames} will be resolved.
          module SubjectRequestMode
            # Not specified.
            SUBJECT_REQUEST_MODE_UNSPECIFIED = 0

            # The default mode used in most cases. Indicates that the certificate's
            # {::Google::Cloud::Security::PrivateCA::V1::Subject Subject} and/or {::Google::Cloud::Security::PrivateCA::V1::SubjectAltNames SubjectAltNames} are specified in the certificate
            # request. This mode requires the caller to have the
            # `privateca.certificates.create` permission.
            DEFAULT = 1

            # A mode reserved for special cases. Indicates that the certificate should
            # have one or more SPIFFE {::Google::Cloud::Security::PrivateCA::V1::SubjectAltNames SubjectAltNames} set by the service based
            # on the caller's identity. This mode will ignore any explicitly specified
            # {::Google::Cloud::Security::PrivateCA::V1::Subject Subject} and/or {::Google::Cloud::Security::PrivateCA::V1::SubjectAltNames SubjectAltNames} in the certificate request.
            # This mode requires the caller to have the
            # `privateca.certificates.createForSelf` permission.
            REFLECTED_SPIFFE = 2
          end
        end
      end
    end
  end
end