76 lines
2.7 KiB
C#
76 lines
2.7 KiB
C#
using System.Collections.Concurrent;
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using System.Security.Claims;
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using System.Text.Encodings.Web;
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using Microsoft.AspNetCore.Authentication;
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using Microsoft.AspNetCore.Authorization;
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using Microsoft.AspNetCore.Http;
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using Microsoft.Extensions.Logging;
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using Microsoft.Extensions.Options;
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namespace MareSynchronosShared.Authentication;
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public class SecretKeyAuthenticationHandler : AuthenticationHandler<AuthenticationSchemeOptions>
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{
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public const string AuthScheme = "SecretKeyGrpcAuth";
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private readonly IHttpContextAccessor _accessor;
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private readonly SecretKeyAuthenticatorService secretKeyAuthenticatorService;
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private static readonly ConcurrentDictionary<string, SemaphoreSlim> IPLocks = new(StringComparer.Ordinal);
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public SecretKeyAuthenticationHandler(IHttpContextAccessor accessor, SecretKeyAuthenticatorService secretKeyAuthenticatorService,
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IOptionsMonitor<AuthenticationSchemeOptions> options, ILoggerFactory logger, UrlEncoder encoder, ISystemClock clock) : base(options, logger, encoder, clock)
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{
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_accessor = accessor;
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this.secretKeyAuthenticatorService = secretKeyAuthenticatorService;
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}
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protected override async Task<AuthenticateResult> HandleAuthenticateAsync()
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{
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var endpoint = Context.GetEndpoint();
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if (endpoint?.Metadata?.GetMetadata<IAllowAnonymous>() != null)
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{
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return AuthenticateResult.NoResult();
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}
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if (!Request.Headers.TryGetValue("Authorization", out var authHeader))
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{
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return AuthenticateResult.Fail("Failed Authorization");
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}
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var ip = _accessor.GetIpAddress();
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if (!IPLocks.TryGetValue(ip, out var semaphore))
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{
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semaphore = new SemaphoreSlim(1);
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IPLocks[ip] = semaphore;
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}
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try
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{
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await semaphore.WaitAsync(Context.RequestAborted).ConfigureAwait(false);
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var authResult = await secretKeyAuthenticatorService.AuthorizeAsync(ip, authHeader).ConfigureAwait(false);
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if (!authResult.Success)
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{
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return AuthenticateResult.Fail("Failed Authorization");
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}
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var claims = new List<Claim>
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{
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new(ClaimTypes.NameIdentifier, authResult.Uid),
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new(ClaimTypes.Authentication, authHeader)
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};
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var identity = new ClaimsIdentity(claims, nameof(SecretKeyAuthenticationHandler));
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var principal = new ClaimsPrincipal(identity);
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var ticket = new AuthenticationTicket(principal, Scheme.Name);
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return AuthenticateResult.Success(ticket);
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}
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finally
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{
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semaphore.Release();
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}
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}
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}
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