Extended KMS authentication encrypt policy

decrypt-policy.json

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Action": [
        "kms:Decrypt",
        "kms:DescribeKey"
      ],
      "Effect": "Allow",
      "Resource": "arn:aws:kms:us-east-1:12345:key/1234abcd-12ab-34cd-56ef-1234567890ab",
      "Condition": {
        "StringEquals": {
          "kms:EncryptionContext:to": "awseipext-production-iad"
        }
      }
    },
    {
      "Action": [
        "ec2:DescribeInstances",
        "ec2:AllocateAddress",
        "ec2:AssociateAddress",
        "ec2:DescribeAddresses",
        "ec2:DisassociateAddress"
      ],
      "Effect": "Allow",
      "Resource": "arn:aws:kms:us-east-1:12345:key/1234abcd-12ab-34cd-56ef-1234567890ab",
      "Condition": {
        "StringEquals": {
          "kms:EncryptionContext:to": "awseipext-production-iad"
        }
      }
    }

  ]
}