プロジェクト、フォルダ、組織に対するアクセス権の管理

using Google.Apis.Auth.OAuth2;
using Google.Apis.CloudResourceManager.v1;
using Google.Apis.CloudResourceManager.v1.Data;

public partial class AccessManager
{
    public static Policy GetPolicy(string projectId)
    {
        var credential = GoogleCredential.GetApplicationDefault()
            .CreateScoped(CloudResourceManagerService.Scope.CloudPlatform);
        var service = new CloudResourceManagerService(
            new CloudResourceManagerService.Initializer
            {
                HttpClientInitializer = credential
            });

        var policy = service.Projects.GetIamPolicy(new GetIamPolicyRequest(),
            projectId).Execute();
        return policy;
    }
}

import com.google.cloud.resourcemanager.v3.ProjectsClient;
import com.google.iam.admin.v1.ProjectName;
import com.google.iam.v1.GetIamPolicyRequest;
import com.google.iam.v1.Policy;
import java.io.IOException;

public class GetProjectPolicy {
  public static void main(String[] args) throws IOException {
    // TODO(developer): Replace the variables before running the sample.
    // TODO: Replace with your project ID.
    String projectId = "your-project-id";

    getProjectPolicy(projectId);
  }

  // Gets a project's policy.
  public static Policy getProjectPolicy(String projectId) throws IOException {
    // Initialize client that will be used to send requests.
    // This client only needs to be created once, and can be reused for multiple requests.
    try (ProjectsClient projectsClient = ProjectsClient.create()) {
      GetIamPolicyRequest request = GetIamPolicyRequest.newBuilder()
              .setResource(ProjectName.of(projectId).toString())
              .build();
      return projectsClient.getIamPolicy(request);
    }
  }
}

from google.cloud import resourcemanager_v3
from google.iam.v1 import iam_policy_pb2, policy_pb2


def get_project_policy(project_id: str) -> policy_pb2.Policy:
    """
    Get policy for project.

    project_id: ID or number of the Google Cloud project you want to use.
    """

    client = resourcemanager_v3.ProjectsClient()
    request = iam_policy_pb2.GetIamPolicyRequest()
    request.resource = f"projects/{project_id}"

    policy = client.get_iam_policy(request)
    print(f"Policy retrieved: {policy}")

    return policy

using Google.Apis.Auth.OAuth2;
using Google.Apis.CloudResourceManager.v1;
using Google.Apis.CloudResourceManager.v1.Data;

public partial class AccessManager
{
    public static Policy GetPolicy(string projectId)
    {
        var credential = GoogleCredential.GetApplicationDefault()
            .CreateScoped(CloudResourceManagerService.Scope.CloudPlatform);
        var service = new CloudResourceManagerService(
            new CloudResourceManagerService.Initializer
            {
                HttpClientInitializer = credential
            });

        var policy = service.Projects.GetIamPolicy(new GetIamPolicyRequest(),
            projectId).Execute();
        return policy;
    }
}

import com.google.cloud.resourcemanager.v3.ProjectsClient;
import com.google.iam.admin.v1.ProjectName;
import com.google.iam.v1.GetIamPolicyRequest;
import com.google.iam.v1.Policy;
import java.io.IOException;

public class GetProjectPolicy {
  public static void main(String[] args) throws IOException {
    // TODO(developer): Replace the variables before running the sample.
    // TODO: Replace with your project ID.
    String projectId = "your-project-id";

    getProjectPolicy(projectId);
  }

  // Gets a project's policy.
  public static Policy getProjectPolicy(String projectId) throws IOException {
    // Initialize client that will be used to send requests.
    // This client only needs to be created once, and can be reused for multiple requests.
    try (ProjectsClient projectsClient = ProjectsClient.create()) {
      GetIamPolicyRequest request = GetIamPolicyRequest.newBuilder()
              .setResource(ProjectName.of(projectId).toString())
              .build();
      return projectsClient.getIamPolicy(request);
    }
  }
}

from google.cloud import resourcemanager_v3
from google.iam.v1 import iam_policy_pb2, policy_pb2


def get_project_policy(project_id: str) -> policy_pb2.Policy:
    """
    Get policy for project.

    project_id: ID or number of the Google Cloud project you want to use.
    """

    client = resourcemanager_v3.ProjectsClient()
    request = iam_policy_pb2.GetIamPolicyRequest()
    request.resource = f"projects/{project_id}"

    policy = client.get_iam_policy(request)
    print(f"Policy retrieved: {policy}")

    return policy

using System.Linq;
using Google.Apis.CloudResourceManager.v1.Data;

public partial class AccessManager
{
    public static Policy AddMember(Policy policy, string role, string member)
    {
        var binding = policy.Bindings.First(x => x.Role == role);
        binding.Members.Add(member);
        return policy;
    }
}

import (
	"fmt"
	"io"

	"google.golang.org/api/iam/v1"
)

// addMember adds a member to a role binding.
func addMember(w io.Writer, policy *iam.Policy, role, member string) {
	for _, binding := range policy.Bindings {
		if binding.Role != role {
			continue
		}
		for _, m := range binding.Members {
			if m != member {
				continue
			}
			fmt.Fprintf(w, "Role %q found. Member already exists.\n", role)
			return
		}
		binding.Members = append(binding.Members, member)
		fmt.Fprintf(w, "Role %q found. Member added.\n", role)
		return
	}
	fmt.Fprintf(w, "Role %q not found. Member not added.\n", role)
}

import com.google.iam.v1.Binding;
import com.google.iam.v1.Policy;
import java.util.ArrayList;
import java.util.List;

public class AddMember {
  public static void main(String[] args) {
    // TODO(developer): Replace the variables before running the sample.
    // TODO: Replace with your policy, GetPolicy.getPolicy(projectId, serviceAccount).
    Policy policy = Policy.newBuilder().build();
    // TODO: Replace with your role.
    String role = "roles/existing-role";
    // TODO: Replace with your member.
    String member = "user:member-to-add@example.com";

    addMember(policy, role, member);
  }

  // Adds a member to a pre-existing role.
  public static Policy addMember(Policy policy, String role, String member) {
    List<Binding> newBindingsList = new ArrayList<>();

    for (Binding b : policy.getBindingsList()) {
      if (b.getRole().equals(role)) {
        newBindingsList.add(b.toBuilder().addMembers(member).build());
      } else {
        newBindingsList.add(b);
      }
    }

    // Update the policy to add the member.
    Policy updatedPolicy = policy.toBuilder()
            .clearBindings()
            .addAllBindings(newBindingsList)
            .build();

    System.out.println("Added member: " + updatedPolicy.getBindingsList());

    return updatedPolicy;
  }
}

from google.iam.v1 import policy_pb2
from snippets.get_policy import get_project_policy
from snippets.set_policy import set_project_policy


def modify_policy_add_member(
    project_id: str, role: str, member: str
) -> policy_pb2.Policy:
    """
    Add a member to certain role in project policy.

    project_id: ID or number of the Google Cloud project you want to use.
    role: role to which member need to be added.
    member: The principals requesting access.

    Possible format for member:
        * user:{emailid}
        * serviceAccount:{emailid}
        * group:{emailid}
        * deleted:user:{emailid}?uid={uniqueid}
        * deleted:serviceAccount:{emailid}?uid={uniqueid}
        * deleted:group:{emailid}?uid={uniqueid}
        * domain:{domain}
    """
    policy = get_project_policy(project_id)

    for bind in policy.bindings:
        if bind.role == role:
            bind.members.append(member)
            break

    return set_project_policy(project_id, policy)

using System.Collections.Generic;
using Google.Apis.CloudResourceManager.v1.Data;

public partial class AccessManager
{
    public static Policy AddBinding(Policy policy, string role, string member)
    {
        var binding = new Binding
        {
            Role = role,
            Members = new List<string> { member }
        };
        policy.Bindings.Add(binding);
        return policy;
    }
}

import com.google.iam.v1.Binding;
import com.google.iam.v1.Policy;
import java.util.Collections;
import java.util.List;

public class AddBinding {
  public static void main(String[] args) {
    // TODO(developer): Replace the variables before running the sample.
    // TODO: Replace with your policy: GetPolicy.getPolicy(projectId, serviceAccount).
    Policy policy = Policy.newBuilder().build();
    // TODO: Replace with your role.
    String role = "roles/role-to-add";
    // TODO: Replace with your members.
    List<String> members = Collections.singletonList("user:member-to-add@example.com");

    addBinding(policy, role, members);
  }

  // Adds a member to a role.
  public static Policy addBinding(Policy policy, String role, List<String> members) {
    Binding binding = Binding.newBuilder()
            .setRole(role)
            .addAllMembers(members)
            .build();

    // Update bindings for the policy.
    Policy updatedPolicy = policy.toBuilder().addBindings(binding).build();

    System.out.println("Added binding: " + updatedPolicy.getBindingsList());

    return updatedPolicy;
  }
}

def modify_policy_add_role(policy: dict, role: str, member: str) -> dict:
    """Adds a new role binding to a policy."""

    binding = {"role": role, "members": [member]}
    policy["bindings"].append(binding)
    print(policy)
    return policy

using System.Linq;
using Google.Apis.CloudResourceManager.v1.Data;

public partial class AccessManager
{
    public static Policy RemoveMember(Policy policy, string role, string member)
    {
        try
        {
            var binding = policy.Bindings.First(x => x.Role == role);
            if (binding.Members.Count != 0 && binding.Members.Contains(member))
            {
                binding.Members.Remove(member);
            }
            if (binding.Members.Count == 0)
            {
                policy.Bindings.Remove(binding);
            }
            return policy;
        }
        catch (System.InvalidOperationException e)
        {
            System.Diagnostics.Debug.WriteLine("Role does not exist in policy: \n" + e.ToString());
            return policy;
        }
    }
}

import (
	"fmt"
	"io"

	"google.golang.org/api/iam/v1"
)

// removeMember removes a member from a role binding.
func removeMember(w io.Writer, policy *iam.Policy, role, member string) {
	bindings := policy.Bindings
	bindingIndex, memberIndex := -1, -1
	for bIdx := range bindings {
		if bindings[bIdx].Role != role {
			continue
		}
		bindingIndex = bIdx
		for mIdx := range bindings[bindingIndex].Members {
			if bindings[bindingIndex].Members[mIdx] != member {
				continue
			}
			memberIndex = mIdx
			break
		}
	}
	if bindingIndex == -1 {
		fmt.Fprintf(w, "Role %q not found. Member not removed.\n", role)
		return
	}
	if memberIndex == -1 {
		fmt.Fprintf(w, "Role %q found. Member not found.\n", role)
		return
	}

	members := removeIdx(bindings[bindingIndex].Members, memberIndex)
	bindings[bindingIndex].Members = members
	if len(members) == 0 {
		bindings = removeIdx(bindings, bindingIndex)
		policy.Bindings = bindings
	}
	fmt.Fprintf(w, "Role %q found. Member removed.\n", role)
}

// removeIdx removes arr[idx] from arr.
func removeIdx[T any](arr []T, idx int) []T {
	return append(arr[:idx], arr[idx+1:]...)
}

import com.google.iam.v1.Binding;
import com.google.iam.v1.Policy;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

public class RemoveMember {
  public static void main(String[] args) throws IOException {
    // TODO(developer): Replace the variables before running the sample.
    // TODO: Replace with your policy, GetPolicy.getPolicy(projectId, serviceAccount).
    Policy policy = Policy.newBuilder().build();
    // TODO: Replace with your role.
    String role = "roles/existing-role";
    // TODO: Replace with your member.
    String member = "user:member-to-add@example.com";

    removeMember(policy, role, member);
  }

  // Removes member from a role; removes binding if binding contains no members.
  public static Policy removeMember(Policy policy, String role, String member) {
    // Creating new builder with all values copied from origin policy
    Policy.Builder policyBuilder = policy.toBuilder();

    // Getting binding with suitable role.
    Binding binding = null;
    for (Binding b : policy.getBindingsList()) {
      if (b.getRole().equals(role)) {
        binding = b;
        break;
      }
    }

    if (binding != null && binding.getMembersList().contains(member)) {
      List<String> newMemberList = new ArrayList<>(binding.getMembersList());
      // Removing member from a role
      newMemberList.remove(member);

      System.out.println("Member " + member + " removed from " + role);

      // Adding all remaining members to create new binding
      Binding newBinding = binding.toBuilder()
              .clearMembers()
              .addAllMembers(newMemberList)
              .build();

      List<Binding> newBindingList = new ArrayList<>(policyBuilder.getBindingsList());

      // Removing old binding to replace with new one
      newBindingList.remove(binding);

      // If binding has no more members, binding will not be added
      if (!newBinding.getMembersList().isEmpty()) {
        newBindingList.add(newBinding);
      }

      // Update the policy to remove the member.
      policyBuilder.clearBindings()
              .addAllBindings(newBindingList);
    }

    Policy updatedPolicy = policyBuilder.build();

    System.out.println("Exising members: " + updatedPolicy.getBindingsList());

    return updatedPolicy;
  }
}

from google.iam.v1 import policy_pb2
from snippets.get_policy import get_project_policy
from snippets.set_policy import set_project_policy


def modify_policy_remove_member(
    project_id: str, role: str, member: str
) -> policy_pb2.Policy:
    """
    Remove a member from certain role in project policy.

    project_id: ID or number of the Google Cloud project you want to use.
    role: role to which member need to be added.
    member: The principals requesting access.

    Possible format for member:
        * user:{emailid}
        * serviceAccount:{emailid}
        * group:{emailid}
        * deleted:user:{emailid}?uid={uniqueid}
        * deleted:serviceAccount:{emailid}?uid={uniqueid}
        * deleted:group:{emailid}?uid={uniqueid}
        * domain:{domain}
    """
    policy = get_project_policy(project_id)

    for bind in policy.bindings:
        if bind.role == role:
            if member in bind.members:
                bind.members.remove(member)
            break

    return set_project_policy(project_id, policy, False)

using Google.Apis.Auth.OAuth2;
using Google.Apis.CloudResourceManager.v1;
using Google.Apis.CloudResourceManager.v1.Data;

public partial class AccessManager
{
    public static Policy SetPolicy(string projectId, Policy policy)
    {
        var credential = GoogleCredential.GetApplicationDefault()
            .CreateScoped(CloudResourceManagerService.Scope.CloudPlatform);
        var service = new CloudResourceManagerService(
            new CloudResourceManagerService.Initializer
            {
                HttpClientInitializer = credential
            });

        return service.Projects.SetIamPolicy(new SetIamPolicyRequest
        {
            Policy = policy
        }, projectId).Execute();
    }
}

import com.google.cloud.resourcemanager.v3.ProjectsClient;
import com.google.iam.admin.v1.ProjectName;
import com.google.iam.v1.Policy;
import com.google.iam.v1.SetIamPolicyRequest;
import com.google.protobuf.FieldMask;
import java.io.IOException;
import java.util.Arrays;
import java.util.List;

public class SetProjectPolicy {
  public static void main(String[] args) throws IOException {
    // TODO(developer): Replace the variables before running the sample.
    // TODO: Replace with your project ID.
    String projectId = "your-project-id";
    // TODO: Replace with your policy, GetPolicy.getPolicy(projectId, serviceAccount).
    Policy policy = Policy.newBuilder().build();

    setProjectPolicy(policy, projectId);
  }

  // Sets a project's policy.
  public static Policy setProjectPolicy(Policy policy, String projectId)
          throws IOException {

    // Initialize client that will be used to send requests.
    // This client only needs to be created once, and can be reused for multiple requests.
    try (ProjectsClient projectsClient = ProjectsClient.create()) {
      List<String> paths = Arrays.asList("bindings", "etag");
      SetIamPolicyRequest request = SetIamPolicyRequest.newBuilder()
              .setResource(ProjectName.of(projectId).toString())
              .setPolicy(policy)
              // A FieldMask specifying which fields of the policy to modify. Only
              // the fields in the mask will be modified. If no mask is provided, the
              // following default mask is used:
              // `paths: "bindings, etag"`
              .setUpdateMask(FieldMask.newBuilder().addAllPaths(paths).build())
              .build();

      return projectsClient.setIamPolicy(request);
    }
  }
}

from google.cloud import resourcemanager_v3
from google.iam.v1 import iam_policy_pb2, policy_pb2


def set_project_policy(
    project_id: str, policy: policy_pb2.Policy, merge: bool = True
) -> policy_pb2.Policy:
    """
    Set policy for project. Pay attention that previous state will be completely rewritten.
    If you want to update only part of the policy follow the approach read->modify->write.
    For more details about policies check out https://cloud.google.com/iam/docs/policies

    project_id: ID or number of the Google Cloud project you want to use.
    policy: Policy which has to be set.
    merge: The strategy to be used forming the request. CopyFrom is clearing both mutable and immutable fields,
    when MergeFrom is replacing only immutable fields and extending mutable.
    https://googleapis.dev/python/protobuf/latest/google/protobuf/message.html#google.protobuf.message.Message.CopyFrom
    """
    client = resourcemanager_v3.ProjectsClient()

    request = iam_policy_pb2.GetIamPolicyRequest()
    request.resource = f"projects/{project_id}"
    current_policy = client.get_iam_policy(request)

    # Etag should as fresh as possible to lower chance of collisions
    policy.ClearField("etag")
    if merge:
        current_policy.MergeFrom(policy)
    else:
        current_policy.CopyFrom(policy)

    request = iam_policy_pb2.SetIamPolicyRequest()
    request.resource = f"projects/{project_id}"

    # request.etag field also will be merged which means you are secured from collision,
    # but it means that request may fail and you need to leverage exponential retries approach
    # to be sure policy has been updated.
    request.policy.CopyFrom(current_policy)

    policy = client.set_iam_policy(request)
    return policy