mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-12-15 16:30:55 +01:00
51 lines
1.5 KiB
Go
51 lines
1.5 KiB
Go
// Copyright 2015 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package pkcs12
|
|
|
|
import (
|
|
"errors"
|
|
"unicode/utf16"
|
|
)
|
|
|
|
// bmpString returns s encoded in UCS-2 with a zero terminator.
|
|
func bmpString(s string) ([]byte, error) {
|
|
// References:
|
|
// https://tools.ietf.org/html/rfc7292#appendix-B.1
|
|
// https://en.wikipedia.org/wiki/Plane_(Unicode)#Basic_Multilingual_Plane
|
|
// - non-BMP characters are encoded in UTF 16 by using a surrogate pair of 16-bit codes
|
|
// EncodeRune returns 0xfffd if the rune does not need special encoding
|
|
// - the above RFC provides the info that BMPStrings are NULL terminated.
|
|
|
|
ret := make([]byte, 0, 2*len(s)+2)
|
|
|
|
for _, r := range s {
|
|
if t, _ := utf16.EncodeRune(r); t != 0xfffd {
|
|
return nil, errors.New("pkcs12: string contains characters that cannot be encoded in UCS-2")
|
|
}
|
|
ret = append(ret, byte(r/256), byte(r%256))
|
|
}
|
|
|
|
return append(ret, 0, 0), nil
|
|
}
|
|
|
|
func decodeBMPString(bmpString []byte) (string, error) {
|
|
if len(bmpString)%2 != 0 {
|
|
return "", errors.New("pkcs12: odd-length BMP string")
|
|
}
|
|
|
|
// strip terminator if present
|
|
if l := len(bmpString); l >= 2 && bmpString[l-1] == 0 && bmpString[l-2] == 0 {
|
|
bmpString = bmpString[:l-2]
|
|
}
|
|
|
|
s := make([]uint16, 0, len(bmpString)/2)
|
|
for len(bmpString) > 0 {
|
|
s = append(s, uint16(bmpString[0])<<8+uint16(bmpString[1]))
|
|
bmpString = bmpString[2:]
|
|
}
|
|
|
|
return string(utf16.Decode(s)), nil
|
|
}
|