Policy Best Practices Allow Users to View Their Own Permissions Using the Console Performing All Actions Controlling access using tags

Amazon Managed Blockchain (AMB) Hyperledger Fabric Identity-Based Policy Examples

By default, IAM users and roles don't have permission to create or modify AMB Access Hyperledger Fabric resources. They also can't perform tasks using the AWS Management Console, AWS CLI, or AWS API. An IAM administrator must create IAM policies that grant users and roles permission to perform specific API operations on the specified resources they need. The administrator must then attach those policies to the IAM users or groups that require those permissions.

To learn how to create an IAM identity-based policy using these example JSON policy documents, see Creating Policies on the JSON Tab in the IAM User Guide.

Topics

Policy Best Practices
Allow Users to View Their Own Permissions
Using the AMB Access Hyperledger Fabric Console
Performing All AMB Access Actions on All Accessible Networks for an AWS Account
Controlling access using tags

Policy Best Practices

Identity-based policies determine whether someone can create, access, or delete AMB Access Hyperledger Fabric resources in your account. These actions can incur costs for your AWS account. When you create or edit identity-based policies, follow these guidelines and recommendations:

Get started with AWS managed policies and move toward least-privilege permissions – To get started granting permissions to your users and workloads, use the AWS managed policies that grant permissions for many common use cases. They are available in your AWS account. We recommend that you reduce permissions further by defining AWS customer managed policies that are specific to your use cases. For more information, see AWS managed policies or AWS managed policies for job functions in the IAM User Guide.
Apply least-privilege permissions – When you set permissions with IAM policies, grant only the permissions required to perform a task. You do this by defining the actions that can be taken on specific resources under specific conditions, also known as least-privilege permissions. For more information about using IAM to apply permissions, see Policies and permissions in IAM in the IAM User Guide.
Use conditions in IAM policies to further restrict access – You can add a condition to your policies to limit access to actions and resources. For example, you can write a policy condition to specify that all requests must be sent using SSL. You can also use conditions to grant access to service actions if they are used through a specific AWS service, such as AWS CloudFormation. For more information, see IAM JSON policy elements: Condition in the IAM User Guide.
Use IAM Access Analyzer to validate your IAM policies to ensure secure and functional permissions – IAM Access Analyzer validates new and existing policies so that the policies adhere to the IAM policy language (JSON) and IAM best practices. IAM Access Analyzer provides more than 100 policy checks and actionable recommendations to help you author secure and functional policies. For more information, see Validate policies with IAM Access Analyzer in the IAM User Guide.
Require multi-factor authentication (MFA) – If you have a scenario that requires IAM users or a root user in your AWS account, turn on MFA for additional security. To require MFA when API operations are called, add MFA conditions to your policies. For more information, see Secure API access with MFA in the IAM User Guide.

For more information about best practices in IAM, see Security best practices in IAM in the IAM User Guide.

Allow Users to View Their Own Permissions

This example shows how you might create a policy that allows IAM users to view the inline and managed policies that are attached to their user identity. This policy includes permissions to complete this action on the console or programmatically using the AWS CLI or AWS API.


{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "ViewOwnUserInfo",
            "Effect": "Allow",
            "Action": [
                "iam:GetUserPolicy",
                "iam:ListGroupsForUser",
                "iam:ListAttachedUserPolicies",
                "iam:ListUserPolicies",
                "iam:GetUser"
            ],
            "Resource": ["arn:aws:iam::*:user/${aws:username}"]
        },
        {
            "Sid": "NavigateInConsole",
            "Effect": "Allow",
            "Action": [
                "iam:GetGroupPolicy",
                "iam:GetPolicyVersion",
                "iam:GetPolicy",
                "iam:ListAttachedGroupPolicies",
                "iam:ListGroupPolicies",
                "iam:ListPolicyVersions",
                "iam:ListPolicies",
                "iam:ListUsers"
            ],
            "Resource": "*"
        }
    ]
}

Using the AMB Access Hyperledger Fabric Console

To access the Amazon Managed Blockchain (AMB) Hyperledger Fabric console, you must have a minimum set of permissions. These permissions must allow you to list and view details about the AMB Access Hyperledger Fabric resources in your AWS account. If you create an identity-based policy that is more restrictive than the minimum required permissions, the console won't function as intended for entities (IAM users or roles) with that policy.

To ensure that those entities can still use the AMB Access Hyperledger Fabric console, also attach the following AWS managed policy to the entities.


AmazonManagedBlockchainConsoleFullAccess

For more information, see Adding Permissions to a User in the IAM User Guide.

You don't need to allow minimum console permissions for users that are making calls only to the AWS CLI or the AWS API. Instead, allow access to only the actions that match the API operation that you're trying to perform.

Performing All AMB Access Actions on All Accessible Networks for an AWS Account

The following example shows you how to grant an IAM user in AWS account 123456789012access to all the network and member resources in the account in the us-east-1 Region. This example shows how the user is permitted to list and create; manage networks, proposals, members, and nodes; and reject invitations to join other networks.

Note

Deny and Allow actions on a resource (for example Network) only affect actions on the resource itself and do not apply to child resources such as Member and Node.
Child resources (such as nodes, members and invitations) must have AWS account ids in their policy so they can be enforced as shown in the following example.


{
    "Version": "2012-10-17",
    "Statement": [{
            "Sid": "ManageNetworkResources",
            "Effect": "Allow",
            "Action": [
                "managedblockchain:CreateNetwork",
                "managedblockchain:GetNetwork",
                "managedblockchain:CreateProposal",
                "managedblockchain:ListProposals",
                "managedblockchain:CreateMember",
                "managedblockchain:ListMembers"                
               ],
            "Resource": [
                "arn:aws:managedblockchain:us-east-1::networks/*"
            ]
        },
        
        {
            "Sid": "ManageMemberResources",
            "Effect": "Allow",
            "Action": [
                "managedblockchain:GetMember",
                "managedblockchain:DeleteMember",
                "managedblockchain:CreateNode",
                "managedblockchain:ListNodes"             
               ],
            "Resource": [
                "arn:aws:managedblockchain:us-east-1:123456789012:members/*"
            ]
        },
        
        {
            "Sid": "ManageNodeResources",
            "Effect": "Allow",
            "Action": [
                "managedblockchain:GetNode",
                "managedblockchain:DeleteNode",
                "managedblockchain:UpdateNode"                
               ],
            "Resource": [
                "arn:aws:managedblockchain:us-east-1:123456789012:nodes/*"
            ]
        },        
        
        {
            "Sid": "ManageProposalResources",
            "Effect": "Allow",
            "Action": [
                "managedblockchain:GetProposal",
                "managedblockchain:ListProposalVotes",
                "managedblockchain:VoteOnProposal"
             ],
            "Resource": [
                "arn:aws:managedblockchain:us-east-1::proposals/*"
            ]
        },             
        
        {
            "Sid": "ManageInvitationResources",
            "Effect": "Allow",
            "Action": [
                "managedblockchain:RejectInvitation"       
               ],
            "Resource": [
                "arn:aws:managedblockchain:us-east-1:123456789012:invitations/*"
            ]
        }
      ]
}

Controlling access using tags

The following example policy statements demonstrate how you can use tags to limit access to AMB Access Hyperledger Fabric resources and actions performed on those resources.

To tag resources during creation, policy statements that allow the create action for the resource as well as the TagResource action must be attached to the IAM principal performing the operation.

Note

This topic includes examples of policy statements with a Deny effect. Each policy statement assumes that a statement with a broader Allow effect for the same actions exists; the Deny policy statement restricts that otherwise overly-permissive allow statement.

Example – Require a tag key with either of two values to be added during network creation

The following identity-based policy statements allow the IAM principal to create a network only if the network is created with the tags specified.

The statement with the Sid set to RequireTag specifies that network creation is allowed only if the network is created with a tag that has a tag key of department and a value of either sales or marketing; otherwise, the create network operation fails.

The statement with Sid set to AllowTagging allows the IAM principal to tag networks, which are not associated with an AWS account ID. It also allows tagging of members in the specified AWS account, 111122223333.


{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "RequireTag",
            "Effect": "Allow",
            "Action": [
                "managedblockchain:CreateNetwork"
            ],
            "Resource": [
                "*"
            ],
            "Condition": {
                "StringLike": {
                    "aws:RequestTag/department": [
                        "sales",
                        "marketing"
                    ]
                }
            }
        },
        {
            "Sid": "AllowTagging",
            "Effect": "Allow",
            "Action": [
                "managedblockchain:TagResource"
            ],
            "Resource": [
                "arn:aws:managedblockchain:us-east-1::networks/*",
                "arn:aws:managedblockchain:us-east-1:111122223333:members/*"
            ]
        }
    ]
}

Example – Deny access to networks that have a specific tag key

The following identity-based policy statement denies the IAM principal the ability to retrieve or view information for networks that have a tag with a tag key of restricted.


{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "DenyRestrictedNetwork",
            "Effect": "Deny",
            "Action": [
                "managedblockchain:GetNetwork"
            ],
            "Resource": [
                "*"
            ],
            "Condition": {
                "StringLike": {
                    "aws:ResourceTag/restricted": [
                        "*"
                    ]
                }
            }
        }
    ]
}

Example – Deny member creation for networks with a specific tag key and value

The following identity-based policy statement denies the IAM principal from creating a member on any network that has a tag with a tag key of department with the value of accounting.


{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "DenyMemberCreation",
            "Effect": "Deny",
            "Action": [
                "managedblockchain:CreateMember"
            ],
            "Resource": [
                "*"
            ],
            "Condition": {
                "StringEquals": {
                    "aws:ResourceTag/department": "accounting"
                }
            }
        }
    ]
}

Example – Allow member creation only if a specific tag key and value are added

The following identity-based policy statements allow the IAM principal to create members in the account 111122223333 only if the member is created with a tag that has the tag key of department and a tag value of accounting; otherwise, the create member operation fails.


{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "RestrictMemberCreation",
            "Effect": "Allow",
            "Action": [
                "managedblockchain:CreateMember"
            ],
            "Resource": [
                "*"
            ],
            "Condition": {
                "StringEquals": {
                    "aws:RequestTag/department": "accounting"
                }
            }
        },
        {
            "Sid": "AllowTaggingOfMembers",
            "Effect": "Allow",
            "Action": [
                "managedblockchain:TagResource"
            ],
            "Resource": [
                "arn:aws:managedblockchain:us-east-1:111122223333:members/*"
            ]
        }
    ]
}

Example – Allow access only to members that have a specified tag key

The following identity-based policy statement allows the IAM principal to retrieve or view information about members only if the member has a tag with a tag key of unrestricted.


{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "",
            "Effect": "Allow",
            "Action": [
                "managedblockchain:GetMember"
            ],
            "Resource": [
                "*"
            ],
            "Condition": {
                "StringLike": {
                    "aws:ResourceTag/unrestricted": [
                        "*"
                    ]
                }
            }
        }
    ]
}

Example – Deny node creation if a specific tag key and value are added during creation

The following identity-based policy statement denies the IAM principal the ability to create a node if a tag with the tag key of department and a value of analytics is added during creation.


{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "DenyCreateNodeWithTag",
            "Effect": "Deny",
            "Action": [
                "managedblockchain:CreateNode"
            ],
            "Resource": [
                "*"
            ],
            "Condition": {
                "StringEquals": {
                    "aws:RequestTag/department": [
                        "analytics"
                    ]
                }
            }
        }
    ]
}

Example – Deny node creation for members with a specific tag key and value

The following identity-based policy statement denies the IAM principal the ability to create a node if the member to which the node will belong has a tag with a tag key of department and a tag value of analytics.


{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "DenyCreateNodeForTaggedMember",
            "Effect": "Deny",
            "Action": [
                "managedblockchain:CreateNode"
            ],
            "Resource": [
                "*"
            ],
            "Condition": {
                "StringEquals": {
                    "aws:ResourceTag/department": [
                        "analytics"
                    ]
                }
            }
        }
    ]
}

Example – Allow access only to nodes with a specific tag key and value

The following identity-based policy statement allows the IAM principal to retrieve or view information about nodes only if the node has a tag with a tag key of department and a tag value of sales.


{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "AllowTaggedNodeAccess",
            "Effect": "Allow",
            "Action": [
                "managedblockchain:GetNode"
            ],
            "Resource": [
                "*"
            ],
            "Condition": {
                "StringEquals": {
                    "aws:ResourceTag/department": [
                        "sales"
                    ]
                }
            }
        }
    ]
}

Example – Deny access to nodes with a specific tag key

The following identity-based policy statement denies the IAM principal the ability to retrieve or view information about a node if the node has a tag with a tag key of restricted.


{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "DenyAccessToTaggedNodes",
            "Effect": "Deny",
            "Action": [
                "managedblockchain:GetNode"
            ],
            "Resource": [
                "*"
            ],
            "Condition": {
                "StringLike": {
                    "aws:ResourceTag/restricted": [
                        "*"
                    ]
                }
            }
        }
    ]
}

Example – Allow proposal creation only for networks with a specific tag key and value

The following identity-based policy statement allows the IAM principal to create a proposal only if the network for which the proposal is made has a tag with a tag key of department and a value of accounting.


{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "AllowCreateProposalOnlyForTaggedNetwork",
            "Effect": "Allow",
            "Action": [
                "managedblockchain:CreateProposal"
            ],
            "Resource": [
                "*"
            ],
            "Condition": {
                "StringEquals": {
                    "aws:ResourceTag/department": [
                        "accounting"
                    ]
                }
            }
        }
    ]
}

Example – Allow proposal creation only if a specific tag key and value are added

The following identity-based policy statements allow the IAM principal to create a proposal for inviting the specified account 123456789012 to the network only if a tag with a tag key of consortium and a tag value of exampleconsortium is added during proposal creation.


{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "RequireTagWithProposal",
            "Effect": "Allow",
            "Action": [
                "managedblockchain:CreateProposal"
            ],
            "Resource": [
                "*"
            ],
            "Condition": {
                "StringEquals": {
                    "aws:RequestTag/consortium": [
                        "exampleconsortium"
                    ]
                }
            }
        },
        {
            "Sid": "AllowProposalAndInvitationTagging",
            "Effect": "Allow",
            "Action": [
                "managedblockchain:TagResource"
            ],
            "Resource": [
                "arn:aws:managedblockchain:us-east-1::proposals/*",
                "arn:aws:managedblockchain:us-east-1:123456789012:invitations/*"
            ]
        }
    ]
}

Example – Allow access only to proposals with a specific tag key and value

The following identity-based policy statement allows the IAM principal to retrieve and view proposals only if the proposal has a tag with a tag key of consortium and a tag value of exampleconsortium.


{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "AllowOnlyTaggedProposalAccess",
            "Effect": "Allow",
            "Action": [
                "managedblockchain:GetProposal"
            ],
            "Resource": [
                "*"
            ],
            "Condition": {
                "StringEquals": {
                    "aws:ResourceTag/consortium": [
                        "exampleconsortium"
                    ]
                }
            }
        }
    ]
}

Example – Deny the ability to vote on proposals based on a specific tag key and value

The following identity-based policy statement denies the IAM principal the ability to vote on proposals that have a tag with the tag key of consortium and a tag value of exampleconsortium.


{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "DenyVoteOnTaggedProposal",
            "Effect": "Deny",
            "Action": [
                "managedblockchain:VoteOnProposal"
            ],
            "Resource": [
                "*"
            ],
            "Condition": {
                "StringEquals": {
                    "aws:ResourceTag/consortium": [
                        "exampleconsortium"
                    ]
                }
            }
        }
    ]
}

Example – Deny the ability to reject an invitation with a specific tag and value

The following identity-based policy statement denies the IAM principal the ability to reject on invitation that has a tag with the tag key of consortium and a tag value of exampleconsortium.


{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "1",
            "Effect": "Deny",
            "Action": [
                "managedblockchain:RejectInvitation"
            ],
            "Resource": [
                "*"
            ],
            "Condition": {
                "StringEquals": {
                    "aws:ResourceTag/consortium": [
                        "exampleconsortium"
                    ]
                }
            }
        }
    ]
}

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Hyperledger Fabric Client IAM Permissions