Exception when opening connection using SSPI/GSS authentication from Windows Server 2012 R2 with version 7.0.1 #4888
Description
Steps to reproduce
Open a connection using SSPI authentication from a Windows Server 2012 R2 client (or Windows 8.1) using version 7.0.1 of Npgsql.
The issue
Getting an 'Exception while reading from stream' when opening a connection using SSPI authentication and version 7.0.1 of Npgsql from a Windows Server 2012 R2 client (or Windows 8.1).
Non-SSPI, ie standard username/password, authentication works fine.
Npgsql version 6.0.8 is unaffected.
Windows 10 clients are unaffected.
Exception message:
Exception while reading from stream
Stack trace:
at Npgsql.Internal.NpgsqlReadBuffer.<Ensure>g__EnsureLong|42_0(NpgsqlReadBuffer buffer, Int32 count, Boolean async, Boolean readingNotifications)
at Npgsql.Internal.NpgsqlConnector.<ReadMessage>g__ReadMessageLong|226_0(NpgsqlConnector connector, Boolean async, DataRowLoadingMode dataRowLoadingMode, Boolean readingNotifications, Boolean isReadingPrependedMessage)
at Npgsql.Internal.NpgsqlConnector.AuthenticateGSS(Boolean async)
at Npgsql.Internal.NpgsqlConnector.Authenticate(String username, NpgsqlTimeout timeout, Boolean async, CancellationToken cancellationToken)
at Npgsql.Internal.NpgsqlConnector.<Open>g__OpenCore|208_1(NpgsqlConnector conn, SslMode sslMode, NpgsqlTimeout timeout, Boolean async, CancellationToken cancellationToken, Boolean isFirstAttempt)
at Npgsql.Internal.NpgsqlConnector.Open(NpgsqlTimeout timeout, Boolean async, CancellationToken cancellationToken)
at Npgsql.PoolingDataSource.OpenNewConnector(NpgsqlConnection conn, NpgsqlTimeout timeout, Boolean async, CancellationToken cancellationToken)
at Npgsql.PoolingDataSource.<Get>g__RentAsync|28_0(NpgsqlConnection conn, NpgsqlTimeout timeout, Boolean async, CancellationToken cancellationToken)
at Npgsql.NpgsqlConnection.<Open>g__OpenAsync|45_0(Boolean async, CancellationToken cancellationToken)
at Npgsql.NpgsqlConnection.Open()
Further technical details
Npgsql version: 7.0.1
.NET version: 7.0.101
PostgreSQL version: 15.1
Operating system: Windows Server 2012 R2 (and also Windows 8.1)
Other details about my project setup:
Works fine when not using SSPI.
Works fine when connecting from Windows 10 clients.
Works fine when using Npgsql version 6.0.8.
Also affects Windows 8.1 which I realise is EOL however Windows Server 2012 R2 is supposedly still in support.