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Add support for international domain names (IDN) in email addresses (#1512)

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* Adjust email address checking to handle unicode

* ASCII only in local part
* allow unicode in second-level and top-level domain

* Add PunyEncoding/Decoding methods and tests

* Use PunyEncoding for outbound email recipients

* Use MailKit for punycode, handle edge cases

* Punyencode all email addresses in mailServices

* Remove punyencoding from HandlebarsMailService

* Add to punyencoding tests

* Use more inclusive e-mail error

* Fix comment wording

* Apply StrictEmail checking to emergency access invite

* Remove punyDecode helper
This commit is contained in:
Thomas Rittson
2021-08-31 13:49:11 +10:00
committed by GitHub
parent dbf82385c9
commit e1908cd6b5
8 changed files with 89 additions and 15 deletions
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26
src/Core/Utilities/CoreHelpers.cs
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@ -27,6 +27,7 @@ using Bit.Core.Enums.Provider;
using Azure.Storage.Queues;
using Azure.Storage.Queues.Models;
using System.Threading;
using MimeKit;
namespace Bit.Core.Utilities
{
@ -488,6 +489,31 @@ namespace Bit.Core.Utilities
return Convert.FromBase64String(output);
}
public static string PunyEncode(string text)
{
if (text == "")
{
return "";
}
if (text == null)
{
return null;
}
if (!text.Contains("@"))
{
// Assume domain name or non-email address
var idn = new IdnMapping();
return idn.GetAscii(text);
}
else
{
// Assume email address
return MailboxAddress.EncodeAddrspec(text);
}
}
public static string FormatLicenseSignatureValue(object val)
{
if (val == null)