/// <summary>
/// Build an instance of <see cref="NodeEntitlements"/> from the information supplied on the
/// command line by the user
/// </summary>
/// <returns>Either a usable (and completely valid) <see cref="NodeEntitlements"/> or a set
/// of errors.</returns>
private Errorable <NodeEntitlements> Build()
{
var entitlement = new NodeEntitlements();
var errors = new List <string>();
ConfigureOptional(VirtualMachineId, url => entitlement.WithVirtualMachineId(url));
Configure(NotBefore, notBefore => entitlement.FromInstant(notBefore));
Configure(NotAfter, notAfter => entitlement.UntilInstant(notAfter));
Configure(Audience, audience => entitlement.WithAudience(audience));
Configure(Issuer, issuer => entitlement.WithIssuer(issuer));
ConfigureAll(Addresses, address => entitlement.AddIpAddress(address));
ConfigureAll(Applications, app => entitlement.AddApplication(app));
if (errors.Any())
{
return(Errorable.Failure <NodeEntitlements>(errors));
}
return(Errorable.Success(entitlement));
// <param name="readConfiguration">function to read the configuration value.</param>
// <param name="applyConfiguration">function to modify our configuration with the value read.</param>
void Configure <V>(Func <Errorable <V> > readConfiguration, Func <V, NodeEntitlements> applyConfiguration)
{
readConfiguration().Match(
whenSuccessful: value => entitlement = applyConfiguration(value),
whenFailure: e => errors.AddRange(e));
}
// <param name="readConfiguration">function to read the configuration value.</param>
// <param name="applyConfiguration">function to modify our configuration with the value read.</param>
void ConfigureOptional <V>(Func <Errorable <V> > readConfiguration, Func <V, NodeEntitlements> applyConfiguration)
where V : class
/// <summary>
/// Verify the provided software entitlement token
/// </summary>
/// <param name="tokenString">A software entitlement token to verify.</param>
/// <param name="expectedAudience">The audience for whom the token should be intended.</param>
/// <param name="expectedIssuer">The issuer who should have created the token.</param>
/// <param name="application">The specific application id of the application </param>
/// <param name="ipAddress">Address of the machine requesting token validation.</param>
/// <returns>Either a software entitlement describing the approved entitlement, or errors
/// explaining why it wasn't approved.</returns>
public Errorable <NodeEntitlements> Verify(
string tokenString,
string expectedAudience,
string expectedIssuer,
string application,
IPAddress ipAddress)
{
var validationParameters = new TokenValidationParameters
{
ValidateAudience = true,
ValidAudience = expectedAudience,
ValidateIssuer = true,
ValidIssuer = expectedIssuer,
ValidateLifetime = true,
RequireExpirationTime = true,
RequireSignedTokens = SigningKey != null,
ClockSkew = TimeSpan.FromSeconds(60),
IssuerSigningKey = SigningKey,
ValidateIssuerSigningKey = true,
TokenDecryptionKey = EncryptionKey
};
try
{
var handler = new JwtSecurityTokenHandler();
var principal = handler.ValidateToken(tokenString, validationParameters, out var token);
if (!VerifyApplication(principal, application))
{
return(ApplicationNotEntitledError(application));
}
if (!VerifyIpAddress(principal, ipAddress))
{
return(MachineNotEntitledError(ipAddress));
}
var entitlementIdClaim = principal.FindFirst(Claims.EntitlementId);
if (entitlementIdClaim == null)
{
return(IdentifierNotPresentError());
}
var result = new NodeEntitlements()
.FromInstant(new DateTimeOffset(token.ValidFrom))
.UntilInstant(new DateTimeOffset(token.ValidTo))
.AddApplication(application)
.WithIdentifier(entitlementIdClaim.Value)
.AddIpAddress(ipAddress);
var virtualMachineIdClaim = principal.FindFirst(Claims.VirtualMachineId);
if (virtualMachineIdClaim != null)
{
result = result.WithVirtualMachineId(virtualMachineIdClaim.Value);
}
return(Errorable.Success(result));
}
catch (SecurityTokenNotYetValidException exception)
{
return(TokenNotYetValidError(exception.NotBefore));
}
catch (SecurityTokenExpiredException exception)
{
return(TokenExpiredError(exception.Expires));
}
catch (SecurityTokenException exception)
{
return(InvalidTokenError(exception.Message));
}
}