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// Copyright 2020 New Relic Corporation. All rights reserved.
// SPDX-License-Identifier: Apache-2.0
package internal
import (
"encoding/base64"
"errors"
)
// Deobfuscate deobfuscates a byte array.
func Deobfuscate(in string, key []byte) ([]byte, error) {
if len(key) == 0 {
return nil, errors.New("key cannot be zero length")
}
decoded, err := base64.StdEncoding.DecodeString(in)
if err != nil {
return nil, err
}
out := make([]byte, len(decoded))
for i, c := range decoded {
out[i] = c ^ key[i%len(key)]
}
return out, nil
}
// Obfuscate obfuscates a byte array for transmission in CAT and RUM.
func Obfuscate(in, key []byte) (string, error) {
if len(key) == 0 {
return "", errors.New("key cannot be zero length")
}
out := make([]byte, len(in))
for i, c := range in {
out[i] = c ^ key[i%len(key)]
}
return base64.StdEncoding.EncodeToString(out), nil
}
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