mirror of
https://github.com/ergochat/ergo.git
synced 2024-12-24 19:52:35 +01:00
42 lines
758 B
Go
42 lines
758 B
Go
|
// Copyright (c) 2015 Kohei YOSHIDA. All rights reserved.
|
||
|
|
// This software is licensed under the 3-Clause BSD License
|
||
|
|
// that can be found in LICENSE file.
|
||
|
|
package internal
|
||
|
|
|
||
|
|
const (
|
||
|
|
cleanBytesLen = 64
|
||
|
|
)
|
||
|
|
|
||
|
|
var (
|
||
|
|
cleanBytes = make([]byte, cleanBytesLen)
|
||
|
|
)
|
||
|
|
|
||
|
|
func CleanSensitiveData(b []byte) {
|
||
|
|
l := len(b)
|
||
|
|
|
||
|
|
for ; l > cleanBytesLen; l -= cleanBytesLen {
|
||
|
|
copy(b[l-cleanBytesLen:l], cleanBytes)
|
||
|
|
}
|
||
|
|
|
||
|
|
if l > 0 {
|
||
|
|
copy(b[0:l], cleanBytes[0:l])
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func RepeatByteSequence(input []byte, length int) []byte {
|
||
|
|
var (
|
||
|
|
sequence = make([]byte, length)
|
||
|
|
unit = len(input)
|
||
|
|
)
|
||
|
|
|
||
|
|
j := length / unit * unit
|
||
|
|
for i := 0; i < j; i += unit {
|
||
|
|
copy(sequence[i:length], input)
|
||
|
|
}
|
||
|
|
if j < length {
|
||
|
|
copy(sequence[j:length], input[0:length-j])
|
||
|
|
}
|
||
|
|
|
||
|
|
return sequence
|
||
|
|
}
|