mirror of
https://github.com/gravitational/teleport.git
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44 lines
1.4 KiB
Go
44 lines
1.4 KiB
Go
/*
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Copyright 2023 Gravitational, Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package aws
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import (
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"regexp"
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)
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// EC2 Node IDs are {AWS account ID}-{EC2 resource ID} eg:
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//
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// 123456789012-i-1234567890abcdef0
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//
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// AWS account ID is always a 12 digit number, see
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//
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// https://docs.aws.amazon.com/general/latest/gr/acct-identifiers.html
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//
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// EC2 resource ID is i-{8 or 17 hex digits}, see
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//
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// https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/resource-ids.html
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var ec2NodeIDRE = regexp.MustCompile("^[0-9]{12}-i-[0-9a-f]{8,}$")
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// IsEC2NodeID returns true if the given ID looks like an EC2 node ID. Uses a
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// simple regex to check. Node IDs are almost always UUIDs when set
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// automatically, but can be manually overridden by admins. If someone manually
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// sets a host ID that looks like one of our generated EC2 node IDs, they may be
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// able to trick this function, so don't use it for any critical purpose.
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func IsEC2NodeID(id string) bool {
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return ec2NodeIDRE.MatchString(id)
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}
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