435c0d9fc8
This PR switches the Nomad repository from using govendor to Go modules for managing dependencies. Aspects of the Nomad workflow remain pretty much the same. The usual Makefile targets should continue to work as they always did. The API submodule simply defers to the parent Nomad version on the repository, keeping the semantics of API versioning that currently exists.
51 lines
1.5 KiB
Go
51 lines
1.5 KiB
Go
// Copyright 2015 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package pkcs12
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import (
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"errors"
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"unicode/utf16"
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)
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// bmpString returns s encoded in UCS-2 with a zero terminator.
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func bmpString(s string) ([]byte, error) {
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// References:
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// https://tools.ietf.org/html/rfc7292#appendix-B.1
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// https://en.wikipedia.org/wiki/Plane_(Unicode)#Basic_Multilingual_Plane
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// - non-BMP characters are encoded in UTF 16 by using a surrogate pair of 16-bit codes
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// EncodeRune returns 0xfffd if the rune does not need special encoding
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// - the above RFC provides the info that BMPStrings are NULL terminated.
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ret := make([]byte, 0, 2*len(s)+2)
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for _, r := range s {
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if t, _ := utf16.EncodeRune(r); t != 0xfffd {
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return nil, errors.New("pkcs12: string contains characters that cannot be encoded in UCS-2")
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}
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ret = append(ret, byte(r/256), byte(r%256))
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}
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return append(ret, 0, 0), nil
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}
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func decodeBMPString(bmpString []byte) (string, error) {
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if len(bmpString)%2 != 0 {
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return "", errors.New("pkcs12: odd-length BMP string")
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}
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// strip terminator if present
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if l := len(bmpString); l >= 2 && bmpString[l-1] == 0 && bmpString[l-2] == 0 {
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bmpString = bmpString[:l-2]
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}
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s := make([]uint16, 0, len(bmpString)/2)
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for len(bmpString) > 0 {
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s = append(s, uint16(bmpString[0])<<8+uint16(bmpString[1]))
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bmpString = bmpString[2:]
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}
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return string(utf16.Decode(s)), nil
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}
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