37 lines
1.1 KiB
Go
37 lines
1.1 KiB
Go
// Copyright (c) 2016 Tigera, Inc. All rights reserved.
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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package hash
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import (
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"crypto"
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"encoding/base64"
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)
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// MakeUniqueID uses a secure hash to create a unique ID from content.
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// The hash is prefixed with "<prefix>:".
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func MakeUniqueID(prefix, content string) string {
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hash := crypto.SHA224.New()
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bytes := []byte(prefix + ":" + content)
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written, err := hash.Write(bytes)
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if err != nil {
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panic(err)
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}
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if written != len(bytes) {
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panic("Failed to write to Hash")
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}
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hashBytes := hash.Sum(make([]byte, 0, hash.Size()))
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return prefix + ":" + base64.RawURLEncoding.EncodeToString(hashBytes)
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}
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