mirror of https://github.com/harness/drone.git
77 lines
2.0 KiB
Go
77 lines
2.0 KiB
Go
// Copyright 2023 Harness, Inc.
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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 types
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import (
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"crypto/sha256"
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"encoding/json"
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"fmt"
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)
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const maxTruncatedLen = 8
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// MaskSecret is a wrapper to store decrypted secrets in memory. This is help to prevent them
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// from getting prints in logs and fmt.
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type MaskSecret struct {
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value string
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hashedValue string
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}
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func NewMaskSecret(val string) MaskSecret {
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hash := sha256.New()
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hash.Write([]byte(val))
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hashedValueStr := fmt.Sprintf("%x", hash.Sum(nil))
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return MaskSecret{
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value: val,
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hashedValue: hashedValueStr[:maxTruncatedLen],
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}
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}
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// Value returns the unmasked value of the MaskSecret.
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// Use cautiously to avoid exposing sensitive data.
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func (s MaskSecret) Value() string {
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return s.value
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}
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func (s MaskSecret) String() string {
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if s.hashedValue == "" && s.value != "" {
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// this case can arise when MarkSecret is created by UnmarshalJSON func where we do not
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// use NewMaskSecret constructor.
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hash := sha256.New()
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hash.Write([]byte(s.value))
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hashedValueStr := fmt.Sprintf("%x", hash.Sum(nil))
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s.hashedValue = hashedValueStr[:maxTruncatedLen]
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}
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return s.hashedValue
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}
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func (s MaskSecret) MarshalJSON() ([]byte, error) {
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return json.Marshal(s.value)
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}
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// UnmarshalJSON needs pointer receiver as it modify the receiver.
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func (s *MaskSecret) UnmarshalJSON(data []byte) error {
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var input string
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if err := json.Unmarshal(data, &input); err != nil {
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return err
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}
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s.value = input
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return nil
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}
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