public C_VerifyUpdate ( ulong session, byte part, ulong partLen ) : CKR | ||
session | ulong | The session's handle |
part | byte | Data part |
partLen | ulong | The length of the data part |
return | CKR |
public void _02_SignAndVerifyMultiPartTest() { if (Platform.UnmanagedLongSize != 8 || Platform.StructPackingSize != 1) Assert.Inconclusive("Test cannot be executed on this platform"); CKR rv = CKR.CKR_OK; using (Pkcs11 pkcs11 = new Pkcs11(Settings.Pkcs11LibraryPath)) { rv = pkcs11.C_Initialize(Settings.InitArgs81); if ((rv != CKR.CKR_OK) && (rv != CKR.CKR_CRYPTOKI_ALREADY_INITIALIZED)) Assert.Fail(rv.ToString()); // Find first slot with token present ulong slotId = Helpers.GetUsableSlot(pkcs11); ulong session = CK.CK_INVALID_HANDLE; rv = pkcs11.C_OpenSession(slotId, (CKF.CKF_SERIAL_SESSION | CKF.CKF_RW_SESSION), IntPtr.Zero, IntPtr.Zero, ref session); if (rv != CKR.CKR_OK) Assert.Fail(rv.ToString()); // Login as normal user rv = pkcs11.C_Login(session, CKU.CKU_USER, Settings.NormalUserPinArray, Convert.ToUInt64(Settings.NormalUserPinArray.Length)); if (rv != CKR.CKR_OK) Assert.Fail(rv.ToString()); // Generate asymetric key pair ulong pubKeyId = CK.CK_INVALID_HANDLE; ulong privKeyId = CK.CK_INVALID_HANDLE; rv = Helpers.GenerateKeyPair(pkcs11, session, ref pubKeyId, ref privKeyId); if (rv != CKR.CKR_OK) Assert.Fail(rv.ToString()); // Specify signing mechanism (needs no parameter => no unamanaged memory is needed) CK_MECHANISM mechanism = CkmUtils.CreateMechanism(CKM.CKM_SHA1_RSA_PKCS); byte[] sourceData = ConvertUtils.Utf8StringToBytes("Hello world"); byte[] signature = null; // Multipart signature functions C_SignUpdate and C_SignFinal can be used i.e. for signing of streamed data using (MemoryStream inputStream = new MemoryStream(sourceData)) { // Initialize signing operation rv = pkcs11.C_SignInit(session, ref mechanism, privKeyId); if (rv != CKR.CKR_OK) Assert.Fail(rv.ToString()); // Prepare buffer for source data part // Note that in real world application we would rather use bigger buffer i.e. 4096 bytes long byte[] part = new byte[8]; // Read input stream with source data int bytesRead = 0; while ((bytesRead = inputStream.Read(part, 0, part.Length)) > 0) { // Process each individual source data part rv = pkcs11.C_SignUpdate(session, part, Convert.ToUInt64(bytesRead)); if (rv != CKR.CKR_OK) Assert.Fail(rv.ToString()); } // Get the length of signature in first call ulong signatureLen = 0; rv = pkcs11.C_SignFinal(session, null, ref signatureLen); if (rv != CKR.CKR_OK) Assert.Fail(rv.ToString()); Assert.IsTrue(signatureLen > 0); // Allocate array for signature signature = new byte[signatureLen]; // Get signature in second call rv = pkcs11.C_SignFinal(session, signature, ref signatureLen); if (rv != CKR.CKR_OK) Assert.Fail(rv.ToString()); } // Do something interesting with signature // Multipart verification functions C_VerifyUpdate and C_VerifyFinal can be used i.e. for signature verification of streamed data using (MemoryStream inputStream = new MemoryStream(sourceData)) { // Initialize verification operation rv = pkcs11.C_VerifyInit(session, ref mechanism, pubKeyId); if (rv != CKR.CKR_OK) Assert.Fail(rv.ToString()); // Prepare buffer for source data part // Note that in real world application we would rather use bigger buffer i.e. 4096 bytes long byte[] part = new byte[8]; // Read input stream with source data int bytesRead = 0; while ((bytesRead = inputStream.Read(part, 0, part.Length)) > 0) { // Process each individual source data part rv = pkcs11.C_VerifyUpdate(session, part, Convert.ToUInt64(bytesRead)); if (rv != CKR.CKR_OK) Assert.Fail(rv.ToString()); } // Verify signature rv = pkcs11.C_VerifyFinal(session, signature, Convert.ToUInt64(signature.Length)); if (rv != CKR.CKR_OK) Assert.Fail(rv.ToString()); } // Do something interesting with verification result rv = pkcs11.C_DestroyObject(session, privKeyId); if (rv != CKR.CKR_OK) Assert.Fail(rv.ToString()); rv = pkcs11.C_DestroyObject(session, pubKeyId); if (rv != CKR.CKR_OK) Assert.Fail(rv.ToString()); rv = pkcs11.C_Logout(session); if (rv != CKR.CKR_OK) Assert.Fail(rv.ToString()); rv = pkcs11.C_CloseSession(session); if (rv != CKR.CKR_OK) Assert.Fail(rv.ToString()); rv = pkcs11.C_Finalize(IntPtr.Zero); if (rv != CKR.CKR_OK) Assert.Fail(rv.ToString()); } }