395 lines
14 KiB
C#
395 lines
14 KiB
C#
using System.IdentityModel.Tokens.Jwt;
|
|
using System.Security.Claims;
|
|
using System.Security.Cryptography;
|
|
using System.Text;
|
|
using DysonNetwork.Sphere.Auth.OidcProvider.Models;
|
|
using DysonNetwork.Sphere.Auth.OidcProvider.Options;
|
|
using DysonNetwork.Sphere.Auth.OidcProvider.Responses;
|
|
using DysonNetwork.Sphere.Developer;
|
|
using DysonNetwork.Sphere.Storage;
|
|
using Microsoft.EntityFrameworkCore;
|
|
using Microsoft.Extensions.Options;
|
|
using Microsoft.IdentityModel.Tokens;
|
|
using NodaTime;
|
|
|
|
namespace DysonNetwork.Sphere.Auth.OidcProvider.Services;
|
|
|
|
public class OidcProviderService(
|
|
AppDatabase db,
|
|
AuthService auth,
|
|
ICacheService cache,
|
|
IOptions<OidcProviderOptions> options,
|
|
ILogger<OidcProviderService> logger
|
|
)
|
|
{
|
|
private readonly OidcProviderOptions _options = options.Value;
|
|
|
|
public async Task<CustomApp?> FindClientByIdAsync(Guid clientId)
|
|
{
|
|
return await db.CustomApps
|
|
.Include(c => c.Secrets)
|
|
.FirstOrDefaultAsync(c => c.Id == clientId);
|
|
}
|
|
|
|
public async Task<CustomApp?> FindClientByAppIdAsync(Guid appId)
|
|
{
|
|
return await db.CustomApps
|
|
.Include(c => c.Secrets)
|
|
.FirstOrDefaultAsync(c => c.Id == appId);
|
|
}
|
|
|
|
public async Task<Session?> FindValidSessionAsync(Guid accountId, Guid clientId)
|
|
{
|
|
var now = SystemClock.Instance.GetCurrentInstant();
|
|
|
|
return await db.AuthSessions
|
|
.Include(s => s.Challenge)
|
|
.Where(s => s.AccountId == accountId &&
|
|
s.AppId == clientId &&
|
|
(s.ExpiredAt == null || s.ExpiredAt > now) &&
|
|
s.Challenge.Type == ChallengeType.OAuth)
|
|
.OrderByDescending(s => s.CreatedAt)
|
|
.FirstOrDefaultAsync();
|
|
}
|
|
|
|
public async Task<bool> ValidateClientCredentialsAsync(Guid clientId, string clientSecret)
|
|
{
|
|
var client = await FindClientByIdAsync(clientId);
|
|
if (client == null) return false;
|
|
|
|
var clock = SystemClock.Instance;
|
|
var secret = client.Secrets
|
|
.Where(s => s.IsOidc && (s.ExpiredAt == null || s.ExpiredAt > clock.GetCurrentInstant()))
|
|
.FirstOrDefault(s => s.Secret == clientSecret); // In production, use proper hashing
|
|
|
|
return secret != null;
|
|
}
|
|
|
|
public async Task<TokenResponse> GenerateTokenResponseAsync(
|
|
Guid clientId,
|
|
string? authorizationCode = null,
|
|
string? redirectUri = null,
|
|
string? codeVerifier = null,
|
|
Guid? sessionId = null
|
|
)
|
|
{
|
|
var client = await FindClientByIdAsync(clientId);
|
|
if (client == null)
|
|
throw new InvalidOperationException("Client not found");
|
|
|
|
Session session;
|
|
var clock = SystemClock.Instance;
|
|
var now = clock.GetCurrentInstant();
|
|
|
|
List<string>? scopes = null;
|
|
if (authorizationCode != null)
|
|
{
|
|
// Authorization code flow
|
|
var authCode = await ValidateAuthorizationCodeAsync(authorizationCode, clientId, redirectUri, codeVerifier);
|
|
if (authCode is null) throw new InvalidOperationException("Invalid authorization code");
|
|
var account = await db.Accounts.Where(a => a.Id == authCode.AccountId).FirstOrDefaultAsync();
|
|
if (account is null) throw new InvalidOperationException("Account was not found");
|
|
|
|
session = await auth.CreateSessionForOidcAsync(account, now, client.Id);
|
|
scopes = authCode.Scopes;
|
|
}
|
|
else if (sessionId.HasValue)
|
|
{
|
|
// Refresh token flow
|
|
session = await FindSessionByIdAsync(sessionId.Value) ??
|
|
throw new InvalidOperationException("Invalid session");
|
|
|
|
// Verify the session is still valid
|
|
if (session.ExpiredAt < now)
|
|
throw new InvalidOperationException("Session has expired");
|
|
}
|
|
else
|
|
{
|
|
throw new InvalidOperationException("Either authorization code or session ID must be provided");
|
|
}
|
|
|
|
var expiresIn = (int)_options.AccessTokenLifetime.TotalSeconds;
|
|
var expiresAt = now.Plus(Duration.FromSeconds(expiresIn));
|
|
|
|
// Generate an access token
|
|
var accessToken = GenerateJwtToken(client, session, expiresAt, scopes);
|
|
var refreshToken = GenerateRefreshToken(session);
|
|
|
|
return new TokenResponse
|
|
{
|
|
AccessToken = accessToken,
|
|
ExpiresIn = expiresIn,
|
|
TokenType = "Bearer",
|
|
RefreshToken = refreshToken,
|
|
Scope = scopes != null ? string.Join(" ", scopes) : null
|
|
};
|
|
}
|
|
|
|
private string GenerateJwtToken(
|
|
CustomApp client,
|
|
Session session,
|
|
Instant expiresAt,
|
|
IEnumerable<string>? scopes = null
|
|
)
|
|
{
|
|
var tokenHandler = new JwtSecurityTokenHandler();
|
|
var clock = SystemClock.Instance;
|
|
var now = clock.GetCurrentInstant();
|
|
|
|
var tokenDescriptor = new SecurityTokenDescriptor
|
|
{
|
|
Subject = new ClaimsIdentity([
|
|
new Claim(JwtRegisteredClaimNames.Sub, session.AccountId.ToString()),
|
|
new Claim(JwtRegisteredClaimNames.Jti, session.Id.ToString()),
|
|
new Claim(JwtRegisteredClaimNames.Iat, now.ToUnixTimeSeconds().ToString(),
|
|
ClaimValueTypes.Integer64),
|
|
new Claim("client_id", client.Id.ToString())
|
|
]),
|
|
Expires = expiresAt.ToDateTimeUtc(),
|
|
Issuer = _options.IssuerUri,
|
|
Audience = client.Id.ToString()
|
|
};
|
|
|
|
// Try to use RSA signing if keys are available, fall back to HMAC
|
|
var rsaPrivateKey = _options.GetRsaPrivateKey();
|
|
tokenDescriptor.SigningCredentials = new SigningCredentials(
|
|
new RsaSecurityKey(rsaPrivateKey),
|
|
SecurityAlgorithms.RsaSha256
|
|
);
|
|
|
|
// Add scopes as claims if provided
|
|
var effectiveScopes = scopes?.ToList() ?? client.OauthConfig!.AllowedScopes?.ToList() ?? [];
|
|
if (effectiveScopes.Count != 0)
|
|
{
|
|
tokenDescriptor.Subject.AddClaims(
|
|
effectiveScopes.Select(scope => new Claim("scope", scope)));
|
|
}
|
|
|
|
var token = tokenHandler.CreateToken(tokenDescriptor);
|
|
return tokenHandler.WriteToken(token);
|
|
}
|
|
|
|
public (bool isValid, JwtSecurityToken? token) ValidateToken(string token)
|
|
{
|
|
try
|
|
{
|
|
var tokenHandler = new JwtSecurityTokenHandler();
|
|
var validationParameters = new TokenValidationParameters
|
|
{
|
|
ValidateIssuer = true,
|
|
ValidIssuer = _options.IssuerUri,
|
|
ValidateAudience = false,
|
|
ValidateLifetime = true,
|
|
ClockSkew = TimeSpan.Zero
|
|
};
|
|
|
|
// Try to use RSA validation if public key is available
|
|
var rsaPublicKey = _options.GetRsaPublicKey();
|
|
validationParameters.IssuerSigningKey = new RsaSecurityKey(rsaPublicKey);
|
|
validationParameters.ValidateIssuerSigningKey = true;
|
|
validationParameters.ValidAlgorithms = new[] { SecurityAlgorithms.RsaSha256 };
|
|
|
|
|
|
tokenHandler.ValidateToken(token, validationParameters, out var validatedToken);
|
|
return (true, (JwtSecurityToken)validatedToken);
|
|
}
|
|
catch (Exception ex)
|
|
{
|
|
logger.LogError(ex, "Token validation failed");
|
|
return (false, null);
|
|
}
|
|
}
|
|
|
|
public async Task<Session?> FindSessionByIdAsync(Guid sessionId)
|
|
{
|
|
return await db.AuthSessions
|
|
.Include(s => s.Account)
|
|
.Include(s => s.Challenge)
|
|
.Include(s => s.App)
|
|
.FirstOrDefaultAsync(s => s.Id == sessionId);
|
|
}
|
|
|
|
private static string GenerateRefreshToken(Session session)
|
|
{
|
|
return Convert.ToBase64String(session.Id.ToByteArray());
|
|
}
|
|
|
|
private static bool VerifyHashedSecret(string secret, string hashedSecret)
|
|
{
|
|
// In a real implementation, you'd use a proper password hashing algorithm like PBKDF2, bcrypt, or Argon2
|
|
// For now, we'll do a simple comparison, but you should replace this with proper hashing
|
|
return string.Equals(secret, hashedSecret, StringComparison.Ordinal);
|
|
}
|
|
|
|
public async Task<string> GenerateAuthorizationCodeForReuseSessionAsync(
|
|
Session session,
|
|
Guid clientId,
|
|
string redirectUri,
|
|
IEnumerable<string> scopes,
|
|
string? codeChallenge = null,
|
|
string? codeChallengeMethod = null,
|
|
string? nonce = null)
|
|
{
|
|
var clock = SystemClock.Instance;
|
|
var now = clock.GetCurrentInstant();
|
|
var code = Guid.NewGuid().ToString("N");
|
|
|
|
// Update the session's last activity time
|
|
await db.AuthSessions.Where(s => s.Id == session.Id)
|
|
.ExecuteUpdateAsync(s => s.SetProperty(s => s.LastGrantedAt, now));
|
|
|
|
// Create the authorization code info
|
|
var authCodeInfo = new AuthorizationCodeInfo
|
|
{
|
|
ClientId = clientId,
|
|
AccountId = session.AccountId,
|
|
RedirectUri = redirectUri,
|
|
Scopes = scopes.ToList(),
|
|
CodeChallenge = codeChallenge,
|
|
CodeChallengeMethod = codeChallengeMethod,
|
|
Nonce = nonce,
|
|
CreatedAt = now
|
|
};
|
|
|
|
// Store the code with its metadata in the cache
|
|
var cacheKey = $"auth:code:{code}";
|
|
await cache.SetAsync(cacheKey, authCodeInfo, _options.AuthorizationCodeLifetime);
|
|
|
|
logger.LogInformation("Generated authorization code for client {ClientId} and user {UserId}", clientId, session.AccountId);
|
|
return code;
|
|
}
|
|
|
|
public async Task<string> GenerateAuthorizationCodeAsync(
|
|
Guid clientId,
|
|
Guid userId,
|
|
string redirectUri,
|
|
IEnumerable<string> scopes,
|
|
string? codeChallenge = null,
|
|
string? codeChallengeMethod = null,
|
|
string? nonce = null
|
|
)
|
|
{
|
|
// Generate a random code
|
|
var clock = SystemClock.Instance;
|
|
var code = GenerateRandomString(32);
|
|
var now = clock.GetCurrentInstant();
|
|
|
|
// Create the authorization code info
|
|
var authCodeInfo = new AuthorizationCodeInfo
|
|
{
|
|
ClientId = clientId,
|
|
AccountId = userId,
|
|
RedirectUri = redirectUri,
|
|
Scopes = scopes.ToList(),
|
|
CodeChallenge = codeChallenge,
|
|
CodeChallengeMethod = codeChallengeMethod,
|
|
Nonce = nonce,
|
|
CreatedAt = now
|
|
};
|
|
|
|
// Store the code with its metadata in the cache
|
|
var cacheKey = $"auth:code:{code}";
|
|
await cache.SetAsync(cacheKey, authCodeInfo, _options.AuthorizationCodeLifetime);
|
|
|
|
logger.LogInformation("Generated authorization code for client {ClientId} and user {UserId}", clientId, userId);
|
|
return code;
|
|
}
|
|
|
|
private async Task<AuthorizationCodeInfo?> ValidateAuthorizationCodeAsync(
|
|
string code,
|
|
Guid clientId,
|
|
string? redirectUri = null,
|
|
string? codeVerifier = null
|
|
)
|
|
{
|
|
var cacheKey = $"auth:code:{code}";
|
|
var (found, authCode) = await cache.GetAsyncWithStatus<AuthorizationCodeInfo>(cacheKey);
|
|
|
|
if (!found || authCode == null)
|
|
{
|
|
logger.LogWarning("Authorization code not found: {Code}", code);
|
|
return null;
|
|
}
|
|
|
|
// Verify client ID matches
|
|
if (authCode.ClientId != clientId)
|
|
{
|
|
logger.LogWarning(
|
|
"Client ID mismatch for code {Code}. Expected: {ExpectedClientId}, Actual: {ActualClientId}",
|
|
code, authCode.ClientId, clientId);
|
|
return null;
|
|
}
|
|
|
|
// Verify redirect URI if provided
|
|
if (!string.IsNullOrEmpty(redirectUri) && authCode.RedirectUri != redirectUri)
|
|
{
|
|
logger.LogWarning("Redirect URI mismatch for code {Code}", code);
|
|
return null;
|
|
}
|
|
|
|
// Verify PKCE code challenge if one was provided during authorization
|
|
if (!string.IsNullOrEmpty(authCode.CodeChallenge))
|
|
{
|
|
if (string.IsNullOrEmpty(codeVerifier))
|
|
{
|
|
logger.LogWarning("PKCE code verifier is required but not provided for code {Code}", code);
|
|
return null;
|
|
}
|
|
|
|
var isValid = authCode.CodeChallengeMethod?.ToUpperInvariant() switch
|
|
{
|
|
"S256" => VerifyCodeChallenge(codeVerifier, authCode.CodeChallenge, "S256"),
|
|
"PLAIN" => VerifyCodeChallenge(codeVerifier, authCode.CodeChallenge, "PLAIN"),
|
|
_ => false // Unsupported code challenge method
|
|
};
|
|
|
|
if (!isValid)
|
|
{
|
|
logger.LogWarning("PKCE code verifier validation failed for code {Code}", code);
|
|
return null;
|
|
}
|
|
}
|
|
|
|
// Code is valid, remove it from the cache (codes are single-use)
|
|
await cache.RemoveAsync(cacheKey);
|
|
|
|
return authCode;
|
|
}
|
|
|
|
private static string GenerateRandomString(int length)
|
|
{
|
|
const string chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-._~";
|
|
var random = RandomNumberGenerator.Create();
|
|
var result = new char[length];
|
|
|
|
for (int i = 0; i < length; i++)
|
|
{
|
|
var randomNumber = new byte[4];
|
|
random.GetBytes(randomNumber);
|
|
var index = (int)(BitConverter.ToUInt32(randomNumber, 0) % chars.Length);
|
|
result[i] = chars[index];
|
|
}
|
|
|
|
return new string(result);
|
|
}
|
|
|
|
private static bool VerifyCodeChallenge(string codeVerifier, string codeChallenge, string method)
|
|
{
|
|
if (string.IsNullOrEmpty(codeVerifier)) return false;
|
|
|
|
if (method == "S256")
|
|
{
|
|
using var sha256 = SHA256.Create();
|
|
var hash = sha256.ComputeHash(Encoding.UTF8.GetBytes(codeVerifier));
|
|
var base64 = Base64UrlEncoder.Encode(hash);
|
|
return string.Equals(base64, codeChallenge, StringComparison.Ordinal);
|
|
}
|
|
|
|
if (method == "PLAIN")
|
|
{
|
|
return string.Equals(codeVerifier, codeChallenge, StringComparison.Ordinal);
|
|
}
|
|
|
|
return false;
|
|
}
|
|
} |