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using System.Collections.Frozen;
using System.Net;
using System.Security.AccessControl;
using System.Security.Claims;
using Microsoft.AspNetCore.Http.Features.Authentication;
using Microsoft.AspNetCore.Http.HttpResults;
using Npgsql;
namespace NpgsqlRest;
internal static class AuthHandler
{
//var names = string.Join($",{Environment.NewLine}", typeof(ClaimTypes)
// .GetFields(System.Reflection.BindingFlags.Static | System.Reflection.BindingFlags.Public)
// .Select(f => f.Name)
// .Order()
// .Select(n => $"{{ nameof(System.Security.Claims.ClaimTypes.{n}).ToLowerInvariant(), System.Security.Claims.ClaimTypes.{n} }}"));
private static readonly FrozenDictionary<string, string> ClaimTypes = new Dictionary<string, string>()
{
{ nameof(System.Security.Claims.ClaimTypes.Actor).ToLowerInvariant(), System.Security.Claims.ClaimTypes.Actor },
{ nameof(System.Security.Claims.ClaimTypes.Anonymous).ToLowerInvariant(), System.Security.Claims.ClaimTypes.Anonymous },
{ nameof(System.Security.Claims.ClaimTypes.Authentication).ToLowerInvariant(), System.Security.Claims.ClaimTypes.Authentication },
{ nameof(System.Security.Claims.ClaimTypes.AuthenticationInstant).ToLowerInvariant(), System.Security.Claims.ClaimTypes.AuthenticationInstant },
{ nameof(System.Security.Claims.ClaimTypes.AuthenticationMethod).ToLowerInvariant(), System.Security.Claims.ClaimTypes.AuthenticationMethod },
{ nameof(System.Security.Claims.ClaimTypes.AuthorizationDecision).ToLowerInvariant(), System.Security.Claims.ClaimTypes.AuthorizationDecision },
{ nameof(System.Security.Claims.ClaimTypes.CookiePath).ToLowerInvariant(), System.Security.Claims.ClaimTypes.CookiePath },
{ nameof(System.Security.Claims.ClaimTypes.Country).ToLowerInvariant(), System.Security.Claims.ClaimTypes.Country },
{ nameof(System.Security.Claims.ClaimTypes.DateOfBirth).ToLowerInvariant(), System.Security.Claims.ClaimTypes.DateOfBirth },
{ nameof(System.Security.Claims.ClaimTypes.DenyOnlyPrimaryGroupSid).ToLowerInvariant(), System.Security.Claims.ClaimTypes.DenyOnlyPrimaryGroupSid },
{ nameof(System.Security.Claims.ClaimTypes.DenyOnlyPrimarySid).ToLowerInvariant(), System.Security.Claims.ClaimTypes.DenyOnlyPrimarySid },
{ nameof(System.Security.Claims.ClaimTypes.DenyOnlySid).ToLowerInvariant(), System.Security.Claims.ClaimTypes.DenyOnlySid },
{ nameof(System.Security.Claims.ClaimTypes.DenyOnlyWindowsDeviceGroup).ToLowerInvariant(), System.Security.Claims.ClaimTypes.DenyOnlyWindowsDeviceGroup },
{ nameof(System.Security.Claims.ClaimTypes.Dns).ToLowerInvariant(), System.Security.Claims.ClaimTypes.Dns },
{ nameof(System.Security.Claims.ClaimTypes.Dsa).ToLowerInvariant(), System.Security.Claims.ClaimTypes.Dsa },
{ nameof(System.Security.Claims.ClaimTypes.Email).ToLowerInvariant(), System.Security.Claims.ClaimTypes.Email },
{ nameof(System.Security.Claims.ClaimTypes.Expiration).ToLowerInvariant(), System.Security.Claims.ClaimTypes.Expiration },
{ nameof(System.Security.Claims.ClaimTypes.Expired).ToLowerInvariant(), System.Security.Claims.ClaimTypes.Expired },
{ nameof(System.Security.Claims.ClaimTypes.Gender).ToLowerInvariant(), System.Security.Claims.ClaimTypes.Gender },
{ nameof(System.Security.Claims.ClaimTypes.GivenName).ToLowerInvariant(), System.Security.Claims.ClaimTypes.GivenName },
{ nameof(System.Security.Claims.ClaimTypes.GroupSid).ToLowerInvariant(), System.Security.Claims.ClaimTypes.GroupSid },
{ nameof(System.Security.Claims.ClaimTypes.Hash).ToLowerInvariant(), System.Security.Claims.ClaimTypes.Hash },
{ nameof(System.Security.Claims.ClaimTypes.HomePhone).ToLowerInvariant(), System.Security.Claims.ClaimTypes.HomePhone },
{ nameof(System.Security.Claims.ClaimTypes.IsPersistent).ToLowerInvariant(), System.Security.Claims.ClaimTypes.IsPersistent },
{ nameof(System.Security.Claims.ClaimTypes.Locality).ToLowerInvariant(), System.Security.Claims.ClaimTypes.Locality },
{ nameof(System.Security.Claims.ClaimTypes.MobilePhone).ToLowerInvariant(), System.Security.Claims.ClaimTypes.MobilePhone },
{ nameof(System.Security.Claims.ClaimTypes.Name).ToLowerInvariant(), System.Security.Claims.ClaimTypes.Name },
{ nameof(System.Security.Claims.ClaimTypes.NameIdentifier).ToLowerInvariant(), System.Security.Claims.ClaimTypes.NameIdentifier },
{ nameof(System.Security.Claims.ClaimTypes.OtherPhone).ToLowerInvariant(), System.Security.Claims.ClaimTypes.OtherPhone },
{ nameof(System.Security.Claims.ClaimTypes.PostalCode).ToLowerInvariant(), System.Security.Claims.ClaimTypes.PostalCode },
{ nameof(System.Security.Claims.ClaimTypes.PrimaryGroupSid).ToLowerInvariant(), System.Security.Claims.ClaimTypes.PrimaryGroupSid },
{ nameof(System.Security.Claims.ClaimTypes.PrimarySid).ToLowerInvariant(), System.Security.Claims.ClaimTypes.PrimarySid },
{ nameof(System.Security.Claims.ClaimTypes.Role).ToLowerInvariant(), System.Security.Claims.ClaimTypes.Role },
{ nameof(System.Security.Claims.ClaimTypes.Rsa).ToLowerInvariant(), System.Security.Claims.ClaimTypes.Rsa },
{ nameof(System.Security.Claims.ClaimTypes.SerialNumber).ToLowerInvariant(), System.Security.Claims.ClaimTypes.SerialNumber },
{ nameof(System.Security.Claims.ClaimTypes.Sid).ToLowerInvariant(), System.Security.Claims.ClaimTypes.Sid },
{ nameof(System.Security.Claims.ClaimTypes.Spn).ToLowerInvariant(), System.Security.Claims.ClaimTypes.Spn },
{ nameof(System.Security.Claims.ClaimTypes.StateOrProvince).ToLowerInvariant(), System.Security.Claims.ClaimTypes.StateOrProvince },
{ nameof(System.Security.Claims.ClaimTypes.StreetAddress).ToLowerInvariant(), System.Security.Claims.ClaimTypes.StreetAddress },
{ nameof(System.Security.Claims.ClaimTypes.Surname).ToLowerInvariant(), System.Security.Claims.ClaimTypes.Surname },
{ nameof(System.Security.Claims.ClaimTypes.System).ToLowerInvariant(), System.Security.Claims.ClaimTypes.System },
{ nameof(System.Security.Claims.ClaimTypes.Thumbprint).ToLowerInvariant(), System.Security.Claims.ClaimTypes.Thumbprint },
{ nameof(System.Security.Claims.ClaimTypes.Upn).ToLowerInvariant(), System.Security.Claims.ClaimTypes.Upn },
{ nameof(System.Security.Claims.ClaimTypes.Uri).ToLowerInvariant(), System.Security.Claims.ClaimTypes.Uri },
{ nameof(System.Security.Claims.ClaimTypes.UserData).ToLowerInvariant(), System.Security.Claims.ClaimTypes.UserData },
{ nameof(System.Security.Claims.ClaimTypes.Version).ToLowerInvariant(), System.Security.Claims.ClaimTypes.Version },
{ nameof(System.Security.Claims.ClaimTypes.Webpage).ToLowerInvariant(), System.Security.Claims.ClaimTypes.Webpage },
{ nameof(System.Security.Claims.ClaimTypes.WindowsAccountName).ToLowerInvariant(), System.Security.Claims.ClaimTypes.WindowsAccountName },
{ nameof(System.Security.Claims.ClaimTypes.WindowsDeviceClaim).ToLowerInvariant(), System.Security.Claims.ClaimTypes.WindowsDeviceClaim },
{ nameof(System.Security.Claims.ClaimTypes.WindowsDeviceGroup).ToLowerInvariant(), System.Security.Claims.ClaimTypes.WindowsDeviceGroup },
{ nameof(System.Security.Claims.ClaimTypes.WindowsFqbnVersion).ToLowerInvariant(), System.Security.Claims.ClaimTypes.WindowsFqbnVersion },
{ nameof(System.Security.Claims.ClaimTypes.WindowsSubAuthority).ToLowerInvariant(), System.Security.Claims.ClaimTypes.WindowsSubAuthority },
{ nameof(System.Security.Claims.ClaimTypes.WindowsUserClaim).ToLowerInvariant(), System.Security.Claims.ClaimTypes.WindowsUserClaim },
{ nameof(System.Security.Claims.ClaimTypes.X500DistinguishedName).ToLowerInvariant(), System.Security.Claims.ClaimTypes.X500DistinguishedName }
}.ToFrozenDictionary();
public static async Task HandleLoginAsync(
NpgsqlCommand command,
HttpContext context,
RoutineEndpoint endpoint,
Routine routine,
NpgsqlRestOptions options,
ILogger? logger)
{
await using var reader = await command.ExecuteReaderAsync();
if (await reader.ReadAsync() is false)
{
context.Response.StatusCode = (int)HttpStatusCode.Unauthorized;
return;
}
if (reader.FieldCount == 0)
{
context.Response.StatusCode = (int)HttpStatusCode.Unauthorized;
return;
}
var authenticationType = options.AuthenticationOptions.DefaultAuthenticationType;
string? scheme = null;
string? message = null;
var claims = new List<Claim>(10);
for (int i = 0; i < routine.ColumnCount; i++)
{
var name1 = routine.ColumnNames[i];
var name2 = endpoint.ColumnNames[i];
var descriptor = routine.ColumnsTypeDescriptor[i];
if (options.AuthenticationOptions.StatusColumnName is not null)
{
if (string.Equals(name1, options.AuthenticationOptions.StatusColumnName, StringComparison.OrdinalIgnoreCase) ||
string.Equals(name2, options.AuthenticationOptions.StatusColumnName, StringComparison.OrdinalIgnoreCase))
{
if (descriptor.IsBoolean)
{
var ok = reader?.GetBoolean(i);
if (ok is false)
{
context.Response.StatusCode = (int)HttpStatusCode.Unauthorized;
await context.Response.CompleteAsync();
return;
}
}
else if (descriptor.IsNumeric)
{
var status = reader?.GetInt32(i) ?? 200;
if (status != (int)HttpStatusCode.OK)
{
context.Response.StatusCode = status;
await context.Response.CompleteAsync();
return;
}
}
else
{
logger?.WrongStatusType(routine.Type, routine.Schema, routine.Name);
context.Response.StatusCode = (int)HttpStatusCode.InternalServerError;
await context.Response.CompleteAsync();
return;
}
continue;
}
}
if (options.AuthenticationOptions.SchemeColumnName is not null)
{
if (string.Equals(name1, options.AuthenticationOptions.SchemeColumnName, StringComparison.OrdinalIgnoreCase) ||
string.Equals(name2, options.AuthenticationOptions.SchemeColumnName, StringComparison.OrdinalIgnoreCase))
{
scheme = reader?.GetValue(i).ToString();
continue;
}
}
if (options.AuthenticationOptions.MessageColumnName is not null)
{
if (string.Equals(name1, options.AuthenticationOptions.MessageColumnName, StringComparison.OrdinalIgnoreCase) ||
string.Equals(name2, options.AuthenticationOptions.MessageColumnName, StringComparison.OrdinalIgnoreCase))
{
message = reader?.GetValue(i).ToString();
continue;
}
}
string? claimType;
if (options.AuthenticationOptions.UseActiveDirectoryFederationServicesClaimTypes)
{
if (ClaimTypes.TryGetValue(name1.ToLowerInvariant(), out claimType) is false)
{
if (ClaimTypes.TryGetValue(name2.ToLowerInvariant(), out claimType) is false)
{
claimType = name2;
}
}
}
else
{
claimType = name2;
}
if (reader?.IsDBNull(i) is true)
{
claims.Add(new Claim(claimType, ""));
}
else if (descriptor.IsArray)
{
object[]? values = reader?.GetValue(i) as object[];
for (int j = 0; j < values?.Length; j++)
{
claims.Add(new Claim(claimType, values[j]?.ToString() ?? ""));
}
}
else
{
string? value = reader?.GetValue(i)?.ToString();
claims.Add(new Claim(claimType, value ?? ""));
}
}
var principal = new ClaimsPrincipal(new ClaimsIdentity(
claims, scheme ?? authenticationType,
nameType: options.AuthenticationOptions.DefaultNameClaimType,
roleType: options.AuthenticationOptions.DefaultRoleClaimType));
var result = Results.SignIn(principal: principal, authenticationScheme: scheme) as SignInHttpResult;
if (result is null)
{
logger?.LogError("Failed in constructing user identity for authentication.");
context.Response.StatusCode = (int)HttpStatusCode.InternalServerError;
return;
}
await result.ExecuteAsync(context);
if (message is not null)
{
await context.Response.WriteAsync(message);
}
}
public static async Task HandleLogoutAsync(NpgsqlCommand command, Routine routine, HttpContext context)
{
if (routine.IsVoid)
{
await command.ExecuteNonQueryAsync();
await Results.SignOut().ExecuteAsync(context);
await context.Response.CompleteAsync();
return;
}
List<string> schemes = new(5);
await using NpgsqlDataReader reader = await command.ExecuteReaderAsync();
#pragma warning disable CS8602 // Dereference of a possibly null reference.
while (await reader.ReadAsync())
{
for(int i = 0; i < reader?.FieldCount; i++)
{
if (await reader.IsDBNullAsync(i) is true)
{
continue;
}
var descriptor = routine.ColumnsTypeDescriptor[i];
if (descriptor.IsArray)
{
object[]? values = reader?.GetValue(i) as object[];
for (int j = 0; j < values?.Length; j++)
{
var value = values[j]?.ToString();
if (value is not null)
{
schemes.Add(value);
}
}
}
else
{
string? value = reader?.GetValue(i)?.ToString();
if (value is not null)
{
schemes.Add(value);
}
}
}
}
#pragma warning restore CS8602 // Dereference of a possibly null reference.
await Results.SignOut(authenticationSchemes: schemes.Count == 0 ? null : schemes).ExecuteAsync(context);
await context.Response.CompleteAsync();
}
}
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