/// <summary>
/// Removes one of the attestation policy management certificates.
/// </summary>
/// <param name="certificateToRemove">The certificate to remove.</param>
/// <param name="existingSigningKey">An existing key corresponding to the existing certificate.</param>
/// <param name="existingSigningCertificate">One of the existing policy management certificates.</param>
/// <param name="cancellationToken">Cancellation token used to cancel this operation.</param>
/// <returns>An <see cref="AttestationResponse{PolicyCertificatesModificationResult}"/> with the policy for the specified attestation type.</returns>
public virtual async Task <AttestationResponse <PolicyCertificatesModificationResult> > RemovePolicyManagementCertificateAsync(
X509Certificate2 certificateToRemove,
AsymmetricAlgorithm existingSigningKey,
X509Certificate2 existingSigningCertificate,
CancellationToken cancellationToken = default)
{
using DiagnosticScope scope = _clientDiagnostics.CreateScope($"{nameof(AttestationAdministrationClient)}.{nameof(RemovePolicyManagementCertificate)}");
scope.Start();
try
{
var tokenToRemove = new SecuredAttestationToken(
new PolicyCertificateModification(certificateToRemove),
existingSigningKey,
existingSigningCertificate);
var result = await _policyManagementClient.RemoveAsync(tokenToRemove.ToString(), cancellationToken).ConfigureAwait(false);
var token = new AttestationToken(result.Value.Token);
if (_options.ValidateAttestationTokens)
{
token.ValidateToken(GetSigners(), _options.ValidationCallback);
}
return(new AttestationResponse <PolicyCertificatesModificationResult>(result.GetRawResponse(), token));
}
catch (Exception ex)
{
scope.Failed(ex);
throw;
}
}
/// <summary>
/// Sets the attesttion policy for the specified <see cref="AttestationType"/>.
/// </summary>
/// <param name="attestationType"><see cref="AttestationType"/> whose policy should be set.</param>
/// <param name="policyToSet">Specifies the attestation policy to set.</param>
/// <param name="signingKey">If provided, specifies the signing key used to sign the request to the attestation service.</param>
/// <param name="signingCertificate">If provided, specifies the X.509 certificate which will be used to validate the request with the attestation service.</param>
/// <param name="cancellationToken">Cancellation token used to cancel this operation.</param>
/// <returns>An <see cref="AttestationResponse{PolicyResult}"/> with the policy for the specified attestation type.</returns>
/// <remarks>
/// The <paramref name="signingKey"/> and <paramref name="signingCertificate"/> parameters are optional, but if one is provided the other must also be provided.
/// <para/>
/// If the <paramref name="signingKey"/> and <paramref name="signingCertificate"/> parameters are not provided, then the policy document sent to the
/// attestation service will be unsigned. Unsigned attestation policies are only allowed when the attestation instance is running in AAD mode - if the
/// attestation instance is running in Isolated mode, then a signing key and signing certificate MUST be provided to ensure that the caller of the API is authorized to change policy.
/// The <paramref name="signingCertificate"/> parameter MUST be one of the certificates returned by the <see cref="GetPolicyManagementCertificates(CancellationToken)"/> API.
/// <para/>
/// <para/>
/// Clients need to be able to verify that the attestation policy document was not modified before the policy document was received by the attestation service's enclave.
/// There are two properties provided in the [PolicyResult][attestation_policy_result] that can be used to verify that the service received the policy document:
/// <list type="bullet">
/// <item>
/// <description><see cref="PolicyResult.PolicySigner"/> - if the <see cref="SetPolicy(AttestationType, string, AsymmetricAlgorithm, X509Certificate2, CancellationToken)"/> call included a signing certificate, this will be the certificate provided at the time of the `SetPolicy` call. If no policy signer was set, this will be null. </description>
/// </item>
/// <item>
/// <description><see cref="PolicyResult.PolicyTokenHash"/> - this is the hash of the [JSON Web Token][json_web_token] sent to the service</description>
/// </item>
/// </list>
/// To verify the hash, clients can generate an attestation token and verify the hash generated from that token:
/// <code snippet="Snippet:VerifySigningHash">
/// // The SetPolicyAsync API will create a SecuredAttestationToken to transmit the policy.
/// var policySetToken = new SecuredAttestationToken(new StoredAttestationPolicy { AttestationPolicy = attestationPolicy }, TestEnvironment.PolicySigningKey0, policyTokenSigner);
///
/// var shaHasher = SHA256Managed.Create();
/// var attestationPolicyHash = shaHasher.ComputeHash(Encoding.UTF8.GetBytes(policySetToken.ToString()));
///
/// CollectionAssert.AreEqual(attestationPolicyHash, setResult.Value.PolicyTokenHash);
/// </code>
///
/// If the signing key and certificate are not provided, then the SetPolicyAsync API will create an unsecured attestation token
/// wrapping the attestation policy. To validate the <see cref="PolicyResult.PolicyTokenHash"/> return value, a developer
/// can create their own <see cref="UnsecuredAttestationToken"/> and create the hash of that.
/// <code>
/// var shaHasher = SHA256Managed.Create();
/// var policySetToken = new UnsecuredAttestationToken(new StoredAttestationPolicy { AttestationPolicy = disallowDebugging });
/// disallowDebuggingHash = shaHasher.ComputeHash(Encoding.UTF8.GetBytes(policySetToken.ToString()));
/// </code>
/// </remarks>
public virtual async Task <AttestationResponse <PolicyResult> > SetPolicyAsync(
AttestationType attestationType,
string policyToSet,
AsymmetricAlgorithm signingKey = default,
X509Certificate2 signingCertificate = default,
CancellationToken cancellationToken = default)
{
if (string.IsNullOrEmpty(policyToSet))
{
throw new ArgumentException($"'{nameof(policyToSet)}' cannot be null or empty.", nameof(policyToSet));
}
if (signingKey is null && signingCertificate is not null || signingCertificate is null && signingKey is not null)
{
throw new ArgumentException($"If you specify '{nameof(signingKey)}' or '{nameof(signingCertificate)}', you must also specify '{nameof(signingCertificate)}' or '{nameof(signingKey)}'.");
}
using DiagnosticScope scope = _clientDiagnostics.CreateScope($"{nameof(AttestationAdministrationClient)}.{nameof(SetPolicy)}");
scope.Start();
try
{
AttestationToken tokenToSet;
if (signingKey is null)
{
tokenToSet = new UnsecuredAttestationToken(new StoredAttestationPolicy {
AttestationPolicy = policyToSet,
});
}
else
{
tokenToSet = new SecuredAttestationToken(new StoredAttestationPolicy {
AttestationPolicy = policyToSet,
}, signingKey, signingCertificate);
}
var result = await _policyClient.SetAsync(attestationType, tokenToSet.ToString(), cancellationToken).ConfigureAwait(false);
var token = new AttestationToken(result.Value.Token);
if (_options.ValidateAttestationTokens)
{
token.ValidateToken(GetSigners(), _options.ValidationCallback);
}
return(new AttestationResponse <PolicyResult>(result.GetRawResponse(), token));
}
catch (Exception ex)
{
scope.Failed(ex);
throw;
}
}
/// <summary>
/// Adds the specified new signing certificate to the set of policy management certificates.
/// </summary>
/// <param name="newSigningCertificate">The new certificate to add.</param>
/// <param name="existingSigningKey">An existing key corresponding to the existing certificate.</param>
/// <param name="existingSigningCertificate">One of the existing policy management certificates.</param>
/// <param name="cancellationToken">Cancellation token used to cancel this operation.</param>
/// <returns>An <see cref="AttestationResponse{PolicyCertificatesModificationResult}"/> with the policy for the specified attestation type.</returns>
/// <remarks>
/// </remarks>
public virtual AttestationResponse <PolicyCertificatesModificationResult> AddPolicyManagementCertificate(
X509Certificate2 newSigningCertificate,
AsymmetricAlgorithm existingSigningKey,
X509Certificate2 existingSigningCertificate,
CancellationToken cancellationToken = default)
{
if (newSigningCertificate is null)
{
throw new ArgumentNullException(nameof(newSigningCertificate));
}
if (existingSigningKey is null)
{
throw new ArgumentNullException(nameof(existingSigningKey));
}
if (existingSigningCertificate is null)
{
throw new ArgumentNullException(nameof(existingSigningCertificate));
}
using DiagnosticScope scope = _clientDiagnostics.CreateScope($"{nameof(AttestationAdministrationClient)}.{nameof(AddPolicyManagementCertificate)}");
scope.Start();
try
{
var tokenToAdd = new SecuredAttestationToken(
new PolicyCertificateModification(newSigningCertificate),
existingSigningKey,
existingSigningCertificate);
var result = _policyManagementClient.Add(tokenToAdd.ToString(), cancellationToken);
var token = new AttestationToken(result.Value.Token);
if (_options.ValidateAttestationTokens)
{
token.ValidateToken(GetSigners(), _options.ValidationCallback);
}
return(new AttestationResponse <PolicyCertificatesModificationResult>(result.GetRawResponse(), token));
}
catch (Exception ex)
{
scope.Failed(ex);
throw;
}
}
/// <summary>
/// Resets the policy for the specified <see cref="AttestationType"/> to the default value.
/// </summary>
/// <param name="attestationType"><see cref="AttestationType"/> whose policy should be reset.</param>
/// <param name="signingKey">If provided, specifies the signing key used to sign the request to the attestation service.</param>
/// <param name="signingCertificate">If provided, specifies the X.509 certificate which will be used to validate the request with the attestation service.</param>
/// <param name="cancellationToken">Cancellation token used to cancel this operation.</param>
/// <returns>An <see cref="AttestationResponse{PolicyResult}"/> with the policy for the specified attestation type.</returns>
/// <remarks>
/// The <paramref name="signingKey"/> and <paramref name="signingCertificate"/> parameters are optional, but if one is provided the other must also be provided.
/// <para/>
/// If the <paramref name="signingKey"/> and <paramref name="signingCertificate"/> parameters are not provided, then the policy document sent to the
/// attestation service will be unsigned. Unsigned attestation policies are only allowed when the attestation instance is running in AAD mode - if the
/// attestation instance is running in Isolated mode, then a signing key and signing certificate MUST be provided to ensure that the caller of the API is authorized to change policy.
/// The <paramref name="signingCertificate"/> parameter MUST be one of the certificates returned by the <see cref="GetPolicyManagementCertificates(CancellationToken)"/> API.
/// <para/>
/// </remarks>
///
public virtual AttestationResponse <PolicyResult> ResetPolicy(
AttestationType attestationType,
AsymmetricAlgorithm signingKey = default,
X509Certificate2 signingCertificate = default,
CancellationToken cancellationToken = default)
{
if (signingKey is null && signingCertificate is not null || signingCertificate is null && signingKey is not null)
{
throw new ArgumentException($"If you specify '{nameof(signingKey)}' or '{nameof(signingCertificate)}', you must also specify '{nameof(signingCertificate)}' or '{nameof(signingKey)}'.");
}
using DiagnosticScope scope = _clientDiagnostics.CreateScope($"{nameof(AttestationAdministrationClient)}.{nameof(ResetPolicy)}");
scope.Start();
try
{
AttestationToken tokenToSet;
if (signingKey is null)
{
tokenToSet = new UnsecuredAttestationToken();
}
else
{
tokenToSet = new SecuredAttestationToken(signingKey, signingCertificate);
}
var result = _policyClient.Reset(attestationType, tokenToSet.ToString(), cancellationToken);
var token = new AttestationToken(result.Value.Token);
if (_options.ValidateAttestationTokens)
{
token.ValidateToken(GetSigners(), _options.ValidationCallback);
}
return(new AttestationResponse <PolicyResult>(result.GetRawResponse(), token));
}
catch (Exception ex)
{
scope.Failed(ex);
throw;
}
}
/// <summary>
/// Retrieves the attesttion policy for the specified <see cref="AttestationType"/>.
/// </summary>
/// <param name="certificateToAdd">Attestation Type to retrive.</param>
/// <param name="cancellationToken"></param>
/// <returns>An <see cref="AttestationResponse{PolicyCertificatesModificationResult}"/> with the policy for the specified attestation type.</returns>
public virtual AttestationResponse <PolicyCertificatesModificationResult> RemovePolicyManagementCertificate(SecuredAttestationToken certificateToAdd, CancellationToken cancellationToken = default)
{
using DiagnosticScope scope = _clientDiagnostics.CreateScope($"{nameof(AttestationAdministrationClient)}.{nameof(RemovePolicyManagementCertificate)}");
scope.Start();
try
{
var result = _policyManagementClient.Remove(certificateToAdd.ToString(), cancellationToken);
var token = new AttestationToken(result.Value.Token);
if (_options.ValidateAttestationTokens)
{
token.ValidateToken(GetSigners(), _options.ValidationCallback);
}
return(new AttestationResponse <PolicyCertificatesModificationResult>(result.GetRawResponse(), token));
}
catch (Exception ex)
{
scope.Failed(ex);
throw;
}
}
