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public C_DeriveKey ( uint session, |
||
| session | uint | The session's handle |
| mechanism | Key derivation mechanism | |
| baseKey | uint | The handle of the base key |
| template | The template for the new key | |
| attributeCount | uint | The number of attributes in the template |
| key | uint | Location that receives the handle of the derived key |
| return | CKR | |
public void _01_BasicDeriveKeyTest()
{
if (Platform.UnmanagedLongSize != 4 || Platform.StructPackingSize != 0)
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.InitArgs40);
if ((rv != CKR.CKR_OK) && (rv != CKR.CKR_CRYPTOKI_ALREADY_INITIALIZED))
Assert.Fail(rv.ToString());
// Find first slot with token present
uint slotId = Helpers.GetUsableSlot(pkcs11);
// Open RW session
uint 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.ToUInt32(Settings.NormalUserPinArray.Length));
if (rv != CKR.CKR_OK)
Assert.Fail(rv.ToString());
// Generate symetric key
uint baseKeyId = CK.CK_INVALID_HANDLE;
rv = Helpers.GenerateKey(pkcs11, session, ref baseKeyId);
if (rv != CKR.CKR_OK)
Assert.Fail(rv.ToString());
// Generate random data needed for key derivation
byte[] data = new byte[24];
rv = pkcs11.C_GenerateRandom(session, data, Convert.ToUInt32(data.Length));
if (rv != CKR.CKR_OK)
Assert.Fail(rv.ToString());
// Specify mechanism parameters
// Note that we are allocating unmanaged memory that will have to be freed later
CK_KEY_DERIVATION_STRING_DATA mechanismParams = new CK_KEY_DERIVATION_STRING_DATA();
mechanismParams.Data = UnmanagedMemory.Allocate(data.Length);
UnmanagedMemory.Write(mechanismParams.Data, data);
mechanismParams.Len = Convert.ToUInt32(data.Length);
// Specify derivation mechanism with parameters
// Note that CkmUtils.CreateMechanism() automaticaly copies mechanismParams into newly allocated unmanaged memory
CK_MECHANISM mechanism = CkmUtils.CreateMechanism(CKM.CKM_XOR_BASE_AND_DATA, mechanismParams);
// Derive key
uint derivedKey = CK.CK_INVALID_HANDLE;
rv = pkcs11.C_DeriveKey(session, ref mechanism, baseKeyId, null, 0, ref derivedKey);
if (rv != CKR.CKR_OK)
Assert.Fail(rv.ToString());
// Do something interesting with derived key
Assert.IsTrue(derivedKey != CK.CK_INVALID_HANDLE);
// In LowLevelAPI we have to free all unmanaged memory we previously allocated
UnmanagedMemory.Free(ref mechanismParams.Data);
mechanismParams.Len = 0;
// In LowLevelAPI we have to free unmanaged memory taken by mechanism parameter
UnmanagedMemory.Free(ref mechanism.Parameter);
mechanism.ParameterLen = 0;
rv = pkcs11.C_DestroyObject(session, baseKeyId);
if (rv != CKR.CKR_OK)
Assert.Fail(rv.ToString());
rv = pkcs11.C_DestroyObject(session, derivedKey);
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());
}
}
