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Fix OAuth state error by configuring proper cookie settings for external authentication #797

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Fix OAuth state error by configuring proper cookie settings for external authentication #797

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Copilot Oct 12, 2025
b33bf90
Fix OAuth state error by configuring proper cookie settings for exter…
Copilot Oct 12, 2025
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17 changes: 17 additions & 0 deletions EssentialCSharp.Web/Program.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,7 @@
using EssentialCSharp.Web.Services;
using EssentialCSharp.Web.Services.Referrals;
using Mailjet.Client;
using Microsoft.AspNetCore.Authentication.Cookies;
using Microsoft.AspNetCore.HttpOverrides;
using Microsoft.AspNetCore.Identity;
using Microsoft.AspNetCore.Identity.UI.Services;
Expand Down Expand Up @@ -104,6 +105,22 @@ private static void Main(string[] args)
options.Cookie.HttpOnly = true;
options.ExpireTimeSpan = TimeSpan.FromMinutes(60);
options.SlidingExpiration = true;
// Configure cookie settings for OAuth flows
options.Cookie.SameSite = SameSiteMode.Lax;
options.Cookie.SecurePolicy = builder.Environment.IsDevelopment()
? CookieSecurePolicy.SameAsRequest
: CookieSecurePolicy.Always;
});

// Configure external authentication cookies for OAuth state management
builder.Services.Configure<CookieAuthenticationOptions>(IdentityConstants.ExternalScheme, options =>
{
options.Cookie.SameSite = SameSiteMode.Lax;
options.Cookie.SecurePolicy = builder.Environment.IsDevelopment()
? CookieSecurePolicy.SameAsRequest
: CookieSecurePolicy.Always;
// Increase correlation cookie expiration to handle slow OAuth flows
options.ExpireTimeSpan = TimeSpan.FromMinutes(15);
});

if (builder.Environment.IsDevelopment())
Expand Down