profiles.go

Documentation: golang.org/x/text/secure/precis

     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 8266.
    17  	Nickname *Profile = nickname
    18  
    19  	// Implements the UsernameCaseMapped profile specified in RFC 8265.
    20  	UsernameCaseMapped *Profile = usernameCaseMap
    21  
    22  	// Implements the UsernameCasePreserved profile specified in RFC 8265.
    23  	UsernameCasePreserved *Profile = usernameNoCaseMap
    24  
    25  	// Implements the OpaqueString profile defined in RFC 8265 for passwords and
    26  	// other secure labels.
    27  	OpaqueString *Profile = opaquestring
    28  )
    29  
    30  var (
    31  	nickname = &Profile{
    32  		options: getOpts(
    33  			AdditionalMapping(func() transform.Transformer {
    34  				return &nickAdditionalMapping{}
    35  			}),
    36  			IgnoreCase,
    37  			Norm(norm.NFKC),
    38  			DisallowEmpty,
    39  			repeat,
    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  })
    79
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