private void DenyAll(APIGatewayCustomAuthorizerPolicy.IAMPolicyStatement statement)
{
var any = Resource.Any.GetStringValue();
statement.Effect = Effect.Deny.GetStringValue();
statement.Action.Add(CustomAuthorizerHelper.ComposeAction(Policy.Action.All));
statement.Resource.Add(CustomAuthorizerHelper.ComposeResource(
any, any, any, any, new ResourceAccess(any, any)));
}
private APIGatewayCustomAuthorizerPolicy.IAMPolicyStatement GetPolicy(string access, string methodArn)
{
var statement = new APIGatewayCustomAuthorizerPolicy.IAMPolicyStatement
{
Action = new HashSet <string>(new string[] { EXECUTE_API_INVOKE }),
Effect = access,
//statement.Resource = new HashSet<string>(new string[] { authorizationSettings.AuthorizerApiArn });
Resource = new HashSet <string>(new string[] { methodArn })
};
return(statement);
}
public async Task <APIGatewayCustomAuthorizerResponse> FunctionHandler(APIGatewayCustomAuthorizerRequest request)
{
var token = request.AuthorizationToken;
var type = AuthTokenType.JWT;
var response = new APIGatewayCustomAuthorizerResponse();
var policy = response.PolicyDocument;
var statement = new APIGatewayCustomAuthorizerPolicy.IAMPolicyStatement()
{
Action = new HashSet <string>(),
Resource = new HashSet <string>()
};
if (Validator.Validate(type, token))
{
var vars = request.MethodArn.Split(':');
var apiVars = vars[5].Split('/');
var region = vars[3];
var accountId = vars[4];
var apiId = apiVars[0];
var stage = apiVars[1];
Console.WriteLine(apiVars.Length);
if (apiVars.Length > 4)
{
int id;
if (int.TryParse(apiVars[4], out id))
{
var service = apiVars[3];
Console.WriteLine(service);
Console.WriteLine(id);
var req = new Request()
{
Operation = Operation.VerifyUser,
AuthToken = token,
Payload = JObject.FromObject(new VerifyUserPayload()
{
ResourceId = id
})
};
var lambdaClient = new AmazonLambdaClient();
var invokeRequest = new InvokeRequest()
{
FunctionName = Enum.GetName(typeof(Service), serviceMapping[service]),
Payload = JsonConvert.SerializeObject(req)
};
var lambdaRes = await lambdaClient.InvokeAsync(invokeRequest);
var res = new StreamReader(lambdaRes.Payload).ReadToEnd();
if (res.Contains(Enum.GetName(typeof(VerifyResult), VerifyResult.Allow)))
{
var any = Resource.Any.GetStringValue();
this.AllowOperation(
statement,
CustomAuthorizerHelper.ComposeAction(Policy.Action.Invoke),
CustomAuthorizerHelper.ComposeResource(region, accountId, apiId, stage, new ResourceAccess(any, any))
);
}
else
{
this.DenyAll(statement);
}
}
else
{
var any = Resource.Any.GetStringValue();
this.AllowOperation(
statement,
CustomAuthorizerHelper.ComposeAction(Policy.Action.Invoke),
CustomAuthorizerHelper.ComposeResource(region, accountId, apiId, stage, new ResourceAccess(any, any))
);
}
}
else
{
var any = Resource.Any.GetStringValue();
this.AllowOperation(
statement,
CustomAuthorizerHelper.ComposeAction(Policy.Action.Invoke),
CustomAuthorizerHelper.ComposeResource(region, accountId, apiId, stage, new ResourceAccess(any, any))
);
}
}
else
{
this.DenyAll(statement);
}
policy.Statement.Add(statement);
return(response);
}
private void AllowOperation(APIGatewayCustomAuthorizerPolicy.IAMPolicyStatement statement, string action, string resource)
{
statement.Effect = Effect.Allow.GetStringValue();
statement.Action.Add(action);
statement.Resource.Add(resource);
}