vendor/golang.org/x/text/secure/precis/profiles.go

   1 // Copyright 2015 The Go Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style
   3 // license that can be found in the LICENSE file.
   4
   5 package precis
   6
   7 import (
   8         "unicode"
   9
  10         "golang.org/x/text/runes"
  11         "golang.org/x/text/transform"
  12         "golang.org/x/text/unicode/norm"
  13 )
  14
  15 var (
  16         // Implements the Nickname profile specified in RFC 7700.
  17         // The nickname profile is not idempotent and may need to be applied multiple
  18         // times before being used for comparisons.
  19         Nickname *Profile = nickname
  20
  21         // Implements the UsernameCaseMapped profile specified in RFC 7613.
  22         UsernameCaseMapped *Profile = usernameCaseMap
  23
  24         // Implements the UsernameCasePreserved profile specified in RFC 7613.
  25         UsernameCasePreserved *Profile = usernameNoCaseMap
  26
  27         // Implements the OpaqueString profile defined in RFC 7613 for passwords and other secure labels.
  28         OpaqueString *Profile = opaquestring
  29 )
  30
  31 var (
  32         nickname = &Profile{
  33                 options: getOpts(
  34                         AdditionalMapping(func() transform.Transformer {
  35                                 return &nickAdditionalMapping{}
  36                         }),
  37                         IgnoreCase,
  38                         Norm(norm.NFKC),
  39                         DisallowEmpty,
  40                 ),
  41                 class: freeform,
  42         }
  43         usernameCaseMap = &Profile{
  44                 options: getOpts(
  45                         FoldWidth,
  46                         LowerCase(),
  47                         Norm(norm.NFC),
  48                         BidiRule,
  49                 ),
  50                 class: identifier,
  51         }
  52         usernameNoCaseMap = &Profile{
  53                 options: getOpts(
  54                         FoldWidth,
  55                         Norm(norm.NFC),
  56                         BidiRule,
  57                 ),
  58                 class: identifier,
  59         }
  60         opaquestring = &Profile{
  61                 options: getOpts(
  62                         AdditionalMapping(func() transform.Transformer {
  63                                 return mapSpaces
  64                         }),
  65                         Norm(norm.NFC),
  66                         DisallowEmpty,
  67                 ),
  68                 class: freeform,
  69         }
  70 )
  71
  72 // mapSpaces is a shared value of a runes.Map transformer.
  73 var mapSpaces transform.Transformer = runes.Map(func(r rune) rune {
  74         if unicode.Is(unicode.Zs, r) {
  75                 return ' '
  76         }
  77         return r
  78 })