| 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());
}
}