允许某个请求者操作 - ArnLike/ArnLikeIfExists

ArnLike

ArnLike compares an ARN in a request to a list of ARN patterns in your policy. The policy values can include asterisks (*) to match multiple characters and question marks (?) to match a single character within an ARN segement. Wildcards cannot be used to span ARN segment, so the partition, service, region, account, and resource must all be present in your policy value, even if they are all wildcards. The comparision is case sensitive.

To match a request, the context key must exist in the request and must match at least one of the ARN patterns in your policy.

You can use policy variables in the value of this operator.

ArnLike in an Allow Statement

Policy Condition
Request Context
Result
"ArnLike": {
  "aws:PrincipalArn": [
    "arn:aws:iam::*:role/*",
    "arn:aws:ec2:*:*:instance/i-?????"
  ]
}

aws:PrincipalArn: null

Not AllowedStatement does not apply

"ArnLike": {
  "aws:PrincipalArn": [
    "arn:aws:iam::*:role/*",
    "arn:aws:ec2:*:*:instance/i-?????"
  ]
}

aws:PrincipalArn: arn:aws:iam::123456789012:role/AdminRole

AllowedAssuming no explicit Deny elsewhere

"ArnLike": {
  "aws:PrincipalArn": [
    "arn:aws:iam::*:role/*",
    "arn:aws:ec2:*:*:instance/i-?????"
  ]
}

aws:PrincipalArn: arn:aws:iam::123456789012:user/User

Not AllowedStatement does not apply

ArnLikeIfExists

ArnLikeIfExists compares an ARN in a request to a list of ARN patterns in your policy. The policy values can include asterisks (*) to match multiple characters and question marks (?) to match a single character within an ARN segement. Wildcards cannot be used to span ARN segment, so the partition, service, region, account, and resource must all be present in your policy value, even if they are all wildcards. The comparision is case sensitive.

To match a request, the context key can be absent, but if present it must match at least one of the ARN patterns in your policy.

You can use policy variables in the value of this operator.

ArnLikeIfExists in an Allow Statement

Policy Condition
Request Context
Result
"ArnLikeIfExists": {
  "aws:PrincipalArn": [
    "arn:aws:iam::*:role/*",
    "arn:aws:ec2:*:*:instance/i-?????"
  ]
}

aws:PrincipalArn: null

AllowedAssuming no explicit Deny elsewhere

"ArnLikeIfExists": {
  "aws:PrincipalArn": [
    "arn:aws:iam::*:role/*",
    "arn:aws:ec2:*:*:instance/i-?????"
  ]
}

aws:PrincipalArn: arn:aws:iam::123456789012:role/AdminRole

AllowedAssuming no explicit Deny elsewhere

"ArnLikeIfExists": {
  "aws:PrincipalArn": [
    "arn:aws:iam::*:role/*",
    "arn:aws:ec2:*:*:instance/i-?????"
  ]
}

aws:PrincipalArn: arn:aws:iam::123456789012:user/User

Not AllowedStatement does not apply

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