* HKDF implementation

* Fix CreateMacProvider on OSX

* apply review feedback

* improve error message in case of test failure


Commit migrated from https://github.com/dotnet/corefx/commit/c14fc5636bdb9141f69eaeaf0e5812b80af525b1

* Test large json serializaiton/deserialization

* Fixing test failure, applying feedback

* Add circular dependency test with large object

* Added test writing an object right at threshold level, removed unnecessary test cases

* Fixing typo

* Using VS generated POCO for test

* Addressing feedback

* Applying feedback

* Applying feedback

* Applying feedback

* Refactored the test Json schema

* Commenting failing case

* Applying feedback

* Applying feedback

* Enabling fixed tests


Commit migrated from https://github.com/dotnet/corefx/commit/20334125a70444b5e8cf35f3f661911cd85a78b5

* work on review comments, documentation changes included

* work on including review comments

* work on including review comments

* StringComparison methods improvements

* work on adressing review comments

* helping comment added

* StringComparison tests improved to check all enum values

* setting CurrentCulture test added

* review comments included

* build fixes

* CurrentCulture test removed

* Address nits and react to recent API changes.


Commit migrated from https://github.com/dotnet/corefx/commit/a0f71fa14ecd17c6aee146b8ef76aaec0dd389ed

We missed one case in handling relative URIs:
  ConvertTo(..., relativeUri, typeof(Uri))

Fix this, add tests, and share the UriKind calculation.

Commit migrated from https://github.com/dotnet/corefx/commit/136dba176f62308d701b992857d76ea790fd4631

* Use Strings.resx file for the exception messages within  System.Windows.Extensions

* Use Strings resx file for the exception messages within System.Threading

* Use Strings resx file for the exception messages within System.Security.Cryptography.Xml

* Use Strings resx file for the exception messages within System.Runtime.WindowsRuntime

* Use Strings resx file for the exception messages within System.Reflection.Metadata

* Use Strings resx file for the exception messages within System.Private.Xml

* Use Strings resx file for the exception messages within System.Private.DataContractSerialization

* Use Strings resx file for the exception messages within System.Numerics.Tensors

* Use Strings resx file for the exception messages within System.IO.Packaging

* Use Strings resx file for the exception messages within System.IO.FileSystem

* Use Strings resx file for the exception messages within System.Drawing.Common

* Use Strings resx file for the exception messages within System.DirectoryServices

* Use Strings resx file for the exception messages within System.Diagnostics.DiagnosticSource

* Use Strings resx file for the exception messages within System.Composition.Hosting

* Update ExportDescriptorPromise.cs

* Fix build


Commit migrated from https://github.com/dotnet/corefx/commit/1518fdc5cc94571bf3ce1bb95e1a60f789a67f18

* initial alerts with openssl

* get alerts from schannel

* update tests to work with openssl 1.1.x

* fix ClientAsyncAuthenticate_ServerNoEncryption_NoConnect to work properly with Tls13

* remove extra comment

* feedback from review

* feedback from review

* remove unused variable


Commit migrated from https://github.com/dotnet/corefx/commit/784cb6b5b7e947d3a69c7183847652a0e9335ff0

* WIP

* update

* update

* update

* cleanup

* fix windows

* disable GetHostEntryAsync_InvalidHost_LogsError on Windows

* feedback from review


Commit migrated from https://github.com/dotnet/corefx/commit/fe68ec506c7e2c5c104f912d8899778d022905d0

* Fix thread-safety of LoadPrinters in PrintingServices.Unix.cs

* Restructure lazy initialization in PrintingServices.Unix.cs


Commit migrated from https://github.com/dotnet/corefx/commit/cf64918877d98577363bb40d5eafac52beb80a79

Fix NetStandard issue in System.IO.FileSystem.AccessControl

We built the fix incorrectly so that it would only apply for netcoreapp3.0 but customer needs it on netstandard2.0 (desktop + core).  Customer impact is that they’ll see a PlatformNotSupported exception rather than the new API.

Commit migrated from https://github.com/dotnet/corefx/commit/70150e6750c35c9a67803e9cddfda7b1db2ec487

Commit migrated from https://github.com/dotnet/corefx/commit/dc6136f34c7d4ebbc493a7bb6cf1d15bc82250e6

* Update dependencies from https://github.com/dotnet/arcade build 20191108.11

- Microsoft.DotNet.XUnitExtensions - 5.0.0-beta.19558.11
- Microsoft.DotNet.XUnitConsoleRunner - 2.5.1-beta.19558.11
- Microsoft.DotNet.VersionTools.Tasks - 5.0.0-beta.19558.11
- Microsoft.DotNet.ApiCompat - 5.0.0-beta.19558.11
- Microsoft.DotNet.Arcade.Sdk - 5.0.0-beta.19558.11
- Microsoft.DotNet.Build.Tasks.Configuration - 5.0.0-beta.19558.11
- Microsoft.DotNet.Build.Tasks.Feed - 5.0.0-beta.19558.11
- Microsoft.DotNet.Build.Tasks.Packaging - 5.0.0-beta.19558.11
- Microsoft.DotNet.CodeAnalysis - 5.0.0-beta.19558.11
- Microsoft.DotNet.CoreFxTesting - 5.0.0-beta.19558.11
- Microsoft.DotNet.GenAPI - 5.0.0-beta.19558.11
- Microsoft.DotNet.Helix.Sdk - 5.0.0-beta.19558.11
- Microsoft.DotNet.RemoteExecutor - 5.0.0-beta.19558.11
- Microsoft.DotNet.GenFacades - 5.0.0-beta.19558.11

* Update dependencies from https://github.com/dotnet/core-setup build 20191108.7

- Microsoft.NETCore.App - 5.0.0-alpha.1.19558.7
- Microsoft.NETCore.DotNetHostPolicy - 5.0.0-alpha.1.19558.7
- Microsoft.NETCore.DotNetHost - 5.0.0-alpha.1.19558.7

* Update dependencies from https://github.com/dotnet/corefx build 20191109.1

- runtime.native.System.IO.Ports - 5.0.0-alpha.1.19559.1
- Microsoft.NETCore.Platforms - 5.0.0-alpha.1.19559.1

* Update dependencies from https://github.com/dotnet/standard build 20191108.1

- NETStandard.Library - 2.2.0-prerelease.19558.1

* Update dependencies from https://github.com/dotnet/core-setup build 20191109.5

- Microsoft.NETCore.App - 5.0.0-alpha.1.19559.5
- Microsoft.NETCore.DotNetHostPolicy - 5.0.0-alpha.1.19559.5
- Microsoft.NETCore.DotNetHost - 5.0.0-alpha.1.19559.5

* Update dependencies from https://github.com/dotnet/corefx build 20191109.6

- runtime.native.System.IO.Ports - 5.0.0-alpha.1.19559.6
- Microsoft.NETCore.Platforms - 5.0.0-alpha.1.19559.6

* Update dependencies from https://github.com/dotnet/standard build 20191109.1

- NETStandard.Library - 2.2.0-prerelease.19559.1

* Update dependencies from https://github.com/dotnet/standard build 20191110.1

- NETStandard.Library - 2.2.0-prerelease.19560.1

* Update dependencies from https://github.com/dotnet/arcade build 20191111.8

- Microsoft.DotNet.XUnitExtensions - 5.0.0-beta.19561.8
- Microsoft.DotNet.XUnitConsoleRunner - 2.5.1-beta.19561.8
- Microsoft.DotNet.VersionTools.Tasks - 5.0.0-beta.19561.8
- Microsoft.DotNet.ApiCompat - 5.0.0-beta.19561.8
- Microsoft.DotNet.Arcade.Sdk - 5.0.0-beta.19561.8
- Microsoft.DotNet.Build.Tasks.Configuration - 5.0.0-beta.19561.8
- Microsoft.DotNet.Build.Tasks.Feed - 5.0.0-beta.19561.8
- Microsoft.DotNet.Build.Tasks.Packaging - 5.0.0-beta.19561.8
- Microsoft.DotNet.CodeAnalysis - 5.0.0-beta.19561.8
- Microsoft.DotNet.CoreFxTesting - 5.0.0-beta.19561.8
- Microsoft.DotNet.GenAPI - 5.0.0-beta.19561.8
- Microsoft.DotNet.Helix.Sdk - 5.0.0-beta.19561.8
- Microsoft.DotNet.RemoteExecutor - 5.0.0-beta.19561.8
- Microsoft.DotNet.GenFacades - 5.0.0-beta.19561.8

* Update dependencies from https://github.com/dotnet/core-setup build 20191111.10

- Microsoft.NETCore.App - 5.0.0-alpha.1.19561.10
- Microsoft.NETCore.DotNetHostPolicy - 5.0.0-alpha.1.19561.10
- Microsoft.NETCore.DotNetHost - 5.0.0-alpha.1.19561.10

* Update dependencies from https://github.com/dotnet/corefx build 20191112.1

- runtime.native.System.IO.Ports - 5.0.0-alpha.1.19562.1
- Microsoft.NETCore.Platforms - 5.0.0-alpha.1.19562.1

* React to SourceLink package rename

* Update dependencies from https://github.com/dotnet/arcade build 20191112.5

- Microsoft.DotNet.XUnitExtensions - 5.0.0-beta.19562.5
- Microsoft.DotNet.XUnitConsoleRunner - 2.5.1-beta.19562.5
- Microsoft.DotNet.VersionTools.Tasks - 5.0.0-beta.19562.5
- Microsoft.DotNet.ApiCompat - 5.0.0-beta.19562.5
- Microsoft.DotNet.Arcade.Sdk - 5.0.0-beta.19562.5
- Microsoft.DotNet.Build.Tasks.Configuration - 5.0.0-beta.19562.5
- Microsoft.DotNet.Build.Tasks.Feed - 5.0.0-beta.19562.5
- Microsoft.DotNet.Build.Tasks.Packaging - 5.0.0-beta.19562.5
- Microsoft.DotNet.CodeAnalysis - 5.0.0-beta.19562.5
- Microsoft.DotNet.CoreFxTesting - 5.0.0-beta.19562.5
- Microsoft.DotNet.GenAPI - 5.0.0-beta.19562.5
- Microsoft.DotNet.Helix.Sdk - 5.0.0-beta.19562.5
- Microsoft.DotNet.RemoteExecutor - 5.0.0-beta.19562.5
- Microsoft.DotNet.GenFacades - 5.0.0-beta.19562.5

* Update dependencies from https://github.com/dotnet/core-setup build 20191112.8

- Microsoft.NETCore.App - 5.0.0-alpha.1.19562.8
- Microsoft.NETCore.DotNetHostPolicy - 5.0.0-alpha.1.19562.8
- Microsoft.NETCore.DotNetHost - 5.0.0-alpha.1.19562.8

* Update dependencies from https://github.com/dotnet/corefx build 20191112.8

- runtime.native.System.IO.Ports - 5.0.0-alpha.1.19562.8
- Microsoft.NETCore.Platforms - 5.0.0-alpha.1.19562.8

* Update dependencies from https://github.com/dotnet/standard build 20191112.1

- NETStandard.Library - 2.2.0-prerelease.19562.1

* Fix SQLClient MatchingRefApiCompatBaselines

Now that SQL client no longer builds a netstandard2.0 ref we can't fix
API compat issues with it.  Baseline them instead.  Rename the file
since this is the only active configuration which requires baselining.


Commit migrated from https://github.com/dotnet/corefx/commit/e1bd638024a09174c3de6d5ddc0b4f018372d006

* emove unused locals in System.Data.OleDband keep some logic using discard. Partially fix issue dotnet/corefx#39962

* Update src/System.Data.OleDb/src/OleDbDataReader.cs

update as suggested (OleDbDataReader)
Co-Authored-By: NStephen Toub <stoub@microsoft.com>

* Update src/System.Data.OleDb/src/OleDbTransaction.cs

Done update as suggested
Co-Authored-By: NStephen Toub <stoub@microsoft.com>

* Update src/System.Data.OleDb/src/RowBinding.cs

Done update as suggested (RowDataBinding)
Co-Authored-By: NStephen Toub <stoub@microsoft.com>

* Update src/System.Data.OleDb/src/RowBinding.cs

Done as suggested
Co-Authored-By: NStephen Toub <stoub@microsoft.com>

* Update src/System.Data.OleDb/src/SafeHandles.cs

Done updating as suggested (SafeHandles)
Co-Authored-By: NStephen Toub <stoub@microsoft.com>


Commit migrated from https://github.com/dotnet/corefx/commit/eceea8b4284ca42d8bd0134414b43c835bd80e4c

SmtpConnection: add _aborted field for debugging SmtpClientTest.TestZeroTimeout hang (dotnet/corefx#42557)



Commit migrated from https://github.com/dotnet/corefx/commit/7d3a7b7fb8fe648c1f402bb63b55f623c3065e42

* Set values of array and immutable collection properties directly

* Address review feedback


Commit migrated from https://github.com/dotnet/corefx/commit/a528006b4536e5b73227285b57d2a56116532506

Commit migrated from https://github.com/dotnet/corefx/commit/d62c8fe5a32ba889017cdc1f69984bb59a9ee5c0

* Annotate System.Transactions.Local for nullable

* Reverting assert on Transaction.State property and make it nullabe

* Small udpates

* Applying feedback

* Applying feedback

* Update src/System.Transactions.Local/src/System/Transactions/Transaction.cs
Co-Authored-By: NSantiago Fernandez Madero <safern@microsoft.com>


Commit migrated from https://github.com/dotnet/corefx/commit/8f8b895f843e2b659c8a722c3e38548cfecdb271

* Fix up exception tests where we are asserting against the literal message

* Remove null assignments


Commit migrated from https://github.com/dotnet/corefx/commit/dd1892dc53e28b481bfab364a08573214d3df462

* Add more test data for str.Replace(char, char)

* Add longer strings to verify correctness of vectorised implementation

* Add more test cases for coverage

* Add more test cases for coverage

* Fix test data

* Add test data for different Vector<T> counts


Commit migrated from https://github.com/dotnet/corefx/commit/c43fae9412ed389f20badfa3ed51d5a42251dba2

Add test to verify that JsonEncodedText and Utf8JsonWriter use upper-case hex digits when escaping (2). (dotnet/corefx#42566)

* Add test to verify that JsonEncodedText and Utf8JsonWriter use
upper-case hex digits when escaping.

* Add test to verify that JsonEncodedText and Utf8JsonWriter use
upper-case hex digits when escaping.

* Fix spacing issue in expected text.


Commit migrated from https://github.com/dotnet/corefx/commit/6878693e4bdeb509abfdf51ad40a5a1aae46e2e4

Commit migrated from https://github.com/dotnet/corefx/commit/ac02476cfd31e0aed74e5ea4c9dd0af3d7b1ef7f

* Implemented support for getting Base64 as an equivalent byte array

* New implementation for base-64 support as suggested in review. Added new test cases for it.

* Changed comment

in -> and
Co-Authored-By: NAhson Khan <ahkha@microsoft.com>

* Updated minimum length for TryGetBytesFromBase64 to match minimum length of base-64 string
Co-Authored-By: NGünther Foidl <gue@korporal.at>

* Added old Convert.FromBase64String implementation for older platforms. arrayReturnToPool is now cleared before return. Added test cases for edge cases and full branch coverage. Changed magic number to predefined constant.

* Changed catch-all to only catch FormatException. Removed try-finally since it is most likely unnecessary. Now only clears the sliced buffer.

* Changed back to a try-finally solution for readability.

* Using JsonConstants.StackallocThreshold instead of magic number
Co-Authored-By: NAhson Khan <ahkha@microsoft.com>

* Added test to validate TryGetBytesFromBase64(...) gives the corrresulting bytes.

* Allocate to JsonConstants.StackallocThreshold when doing stackalloc
Co-Authored-By: NStephen Toub <stoub@microsoft.com>


Commit migrated from https://github.com/dotnet/corefx/commit/6a591b2d24869657094816418c46593337550a32

Commit migrated from https://github.com/dotnet/corefx/commit/e717081e0074a0933a24182917c4c45739b85268

Provide more specific exception message when an enumerable or dictionary cannot be instantiated (dotnet/corefx#42497)

* Provide more specific exception message when an enumerable or dictionary cannot be instantiated

* Address review feedback


Commit migrated from https://github.com/dotnet/corefx/commit/961bb667a056bb3b9a5f32e22aed8bb64eaddcad

* change constructor overloads for passing QuicImplementationProvider

* add and use QuicImplementationProviders.Default

* Update src/System.Net.Quic/src/System/Net/Quic/QuicImplementationProviders.cs
Co-Authored-By: NStephen Toub <stoub@microsoft.com>


Commit migrated from https://github.com/dotnet/corefx/commit/460c422dc82f2a80cba8f1a900000e199f1bf02a

Commit migrated from https://github.com/dotnet/corefx/commit/08f186eefe3272a5668775e4c47f19f3e390557f

* add MaskedTextProviderTests(dotnet/corefx#7758)

* Code review issues are fixed


Commit migrated from https://github.com/dotnet/corefx/commit/ff3e0409ea6f626696e0d440d05a8d44fefdc344

Commit migrated from https://github.com/dotnet/corefx/commit/63c85b9de80d101262be231ec9c33a915b2013c4

Commit migrated from https://github.com/dotnet/corefx/commit/cb5be3e9c76c337cb1752b206a50ffc71947aba1

Commit migrated from https://github.com/dotnet/corefx/commit/88f40addc220c73794f962f10d288c20c416ede1

This PR is a follow up to PR dotnet/corefx#36827 which added support for Linux server-side
GSS-API (AcceptSecContext). This enabled NegotitateStream AuthenticateAsServer*
support. It also provided support for ASP.NET Core to allow Kestrel server to have
Negotiate authentication on Linux.

This PR fixes some problems with Negotiate (SPNEGO) fallback from Kerberos to NTLM.
Notably it passes in a correct GSS Acceptor credential so that fallback will work
correctly. As part of fixing that, I noticed some other problems with returning the
user-identity when NTLM is used.

This was tested in a separate enterprise testing environment that I have created.
It builds on technologies that we have started using like docker containers and Azure
pipelines (e.g. HttpStress). The environment is currently here:
https://dev.azure.com/systemnetncl/Enterprise%20Testing. The extra Kerberos tests
and container support is here: https://github.com/davidsh/networkingtests

When the repo merge is completed, I will work with the infra team to see what things
can be merged back into the main repo/CI pipeline and migrate the test sources to an
appropriate place in the new repo.

Contributes to dotnet/corefx#10041
Contributes to dotnet/corefx#24707
Contributes to dotnet/corefx#30150


Commit migrated from https://github.com/dotnet/corefx/commit/1054f1fba1b7222c138dcd20d8da80cd893fdd01

Commit migrated from https://github.com/dotnet/corefx/commit/6d111f30bc014793f4a676dee5b2451fcd25e4eb

Found during the Unix PFX reader/writer work, but wasn't directly relevant to that change.

Commit migrated from https://github.com/dotnet/corefx/commit/2d713265d5aecd5fe34099042e13fe7ba54dcdd1

Commit migrated from https://github.com/dotnet/corefx/commit/5683beb656f8ea3d24635445258662abdcd3de22

* bumping the assembly Version

* correcting the resx file

* keeping netfx for oleDb

* fiixing the netfx tests as well

* fixing the DataSetExtensionsVersion

* removing netstandard2.0 from ref in datasetextensions


Commit migrated from https://github.com/dotnet/corefx/commit/9a4ed0d00bc642b015974684c32b00650426429f

* Fix APICompat issues for member attributes

* Addressing more member attribute diffs

* Fix SQLClient build


Commit migrated from https://github.com/dotnet/corefx/commit/33d0499898434aa2d57e8326317e3d6f6c6401ac

* Read ParentProcessId from kinfo_proc for FreeBSD

* Update src/System.Diagnostics.Process/src/System/Diagnostics/Process.FreeBSD.cs
Co-Authored-By: NStephen Toub <stoub@microsoft.com>

* Update src/System.Diagnostics.Process/src/System/Diagnostics/Process.FreeBSD.cs
Co-Authored-By: NStephen Toub <stoub@microsoft.com>


Commit migrated from https://github.com/dotnet/corefx/commit/7ff22479f523ea468577daf6819005458f475064

Like gentoo, Arch Linux is a rolling release and doesn't have explicit
version numbers.

    $ cat /etc/os-release
    NAME="Arch Linux"
    PRETTY_NAME="Arch Linux"
    ID=arch
    BUILD_ID=rolling
    ANSI_COLOR="0;36"
    HOME_URL="https://www.archlinux.org/"
    DOCUMENTATION_URL="https://wiki.archlinux.org/"
    SUPPORT_URL="https://bbs.archlinux.org/"
    BUG_REPORT_URL="https://bugs.archlinux.org/"
    LOGO=archlinux

Commit migrated from https://github.com/dotnet/corefx/commit/1f08b57bfd197a5492fe2ed0e0c5b2e6de9bf642

* Remove unnecessary check

* re-enable tests


Commit migrated from https://github.com/dotnet/corefx/commit/42c12be146397e671dd54509e824a79a1f8cc3f7

Commit migrated from https://github.com/dotnet/corefx/commit/bc115700c3ece60acd6b8dbe4b0bdb8f6f80c756

* fix and enable FileSystemWatcher_File_Rename_NotAffectEachOther test

* throw on exception

* revert change to FileSystemWatcher_Unix_DoesNotLeak

* update


Commit migrated from https://github.com/dotnet/corefx/commit/b551a6c767551c2286c3fe726a80366fecd09a68