/// <summary> Preps a name according to the Stringprep profile defined in
/// RFC3491.
/// *
/// </summary>
/// <param name="input">the name to prep.
/// </param>
/// <param name="allowUnassigned">true if the name may contain unassigned
/// code points.
/// </param>
/// <returns> the prepped name.
/// @throws StringprepException If the name cannot be prepped with
/// this profile.
/// @throws NullPointerException If the name is null.
///
/// </returns>
public static string NamePrep(string input, bool allowUnassigned)
{
if (input == null)
{
throw new System.NullReferenceException();
}
StringBuilder s = new StringBuilder(input);
if (!allowUnassigned && Contains(s, RFC3454.A1))
{
throw new StringPrepException(StringPrepException.CONTAINS_UNASSIGNED);
}
Filter(s, RFC3454.B1);
Map(s, RFC3454.B2search, RFC3454.B2replace);
s = new StringBuilder(NFKC.NormalizeNFKC(s.ToString()));
// B.3 is only needed if NFKC is not used, right?
// map(s, RFC3454.B3search, RFC3454.B3replace);
if (Contains(s, RFC3454.C12) || Contains(s, RFC3454.C22) || Contains(s, RFC3454.C3) || Contains(s, RFC3454.C4) || Contains(s, RFC3454.C5) || Contains(s, RFC3454.C6) || Contains(s, RFC3454.C7) || Contains(s, RFC3454.C8))
{
// Table C.9 only contains code points > 0xFFFF which Java
// doesn't handle
throw new StringPrepException(StringPrepException.CONTAINS_PROHIBITED);
}
// Bidi handling
bool r = Contains(s, RFC3454.D1);
bool l = Contains(s, RFC3454.D2);
// RFC 3454, section 6, requirement 1: already handled above (table C.8)
// RFC 3454, section 6, requirement 2
if (r && l)
{
throw new StringPrepException(StringPrepException.BIDI_BOTHRAL);
}
// RFC 3454, section 6, requirement 3
if (r)
{
if (!Contains(s[0], RFC3454.D1) || !Contains(s[s.Length - 1], RFC3454.D1))
{
throw new StringPrepException(StringPrepException.BIDI_LTRAL);
}
}
return(s.ToString());
}
public static string SaslPrep(string input)
{
var s = new StringBuilder(input);
/*
* This profile specifies:
*
* - non-ASCII space characters [StringPrep, C.1.2] that can be
* mapped to SPACE (U+0020), and
*
* - the "commonly mapped to nothing" characters [StringPrep, B.1]
* that can be mapped to nothing.
*/
Map(s, RFC3454.C12, RFC3454.C12replace);
Filter(s, RFC3454.B1);
// Bidi handling
//bool r = Contains(s, RFC3454.D1);
//bool l = Contains(s, RFC3454.D2);
/*
* - Non-ASCII space characters [StringPrep, C.1.2]
* - ASCII control characters [StringPrep, C.2.1]
* - Non-ASCII control characters [StringPrep, C.2.2]
* - Private Use characters [StringPrep, C.3]
* - Non-character code points [StringPrep, C.4]
* - Surrogate code points [StringPrep, C.5]
* - Inappropriate for plain text characters [StringPrep, C.6]
* - Inappropriate for canonical representation characters
* [StringPrep, C.7]
* - Change display properties or deprecated characters
* [StringPrep, C.8]
* - Tagging characters [StringPrep, C.9]
*/
if (Contains(s, RFC3454.C12) || Contains(s, RFC3454.C21) || Contains(s, RFC3454.C22) || Contains(s, RFC3454.C3) || Contains(s, RFC3454.C4) || Contains(s, RFC3454.C5) || Contains(s, RFC3454.C6) || Contains(s, RFC3454.C7) || Contains(s, RFC3454.C8))
{
// TODO add C9 table
throw new StringPrepException(StringPrepException.CONTAINS_PROHIBITED);
}
#if WINDOWS_PHONE || CF || SILVERLIGHT || WINRT
return(NFKC.NormalizeNFKC(s.ToString()));
#else
var result = s.ToString();
return(result.Normalize(NormalizationForm.FormKC));
#endif
}
