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public C_GetAttributeValue ( uint session, uint objectId, |
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| session | uint | The session's handle |
| objectId | uint | The object's handle |
| template | Template that specifies which attribute values are to be obtained, and receives the attribute values | |
| count | uint | The number of attributes in the template |
| return | CKR | |
public void _01_GetAttributeValueTest()
{
if (Platform.UnmanagedLongSize != 4 || 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.InitArgs41);
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);
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());
// Create object
uint objectId = CK.CK_INVALID_HANDLE;
rv = Helpers.CreateDataObject(pkcs11, session, ref objectId);
if (rv != CKR.CKR_OK)
Assert.Fail(rv.ToString());
// Prepare list of empty attributes we want to read
CK_ATTRIBUTE[] template = new CK_ATTRIBUTE[2];
template[0] = CkaUtils.CreateAttribute(CKA.CKA_LABEL);
template[1] = CkaUtils.CreateAttribute(CKA.CKA_VALUE);
// Get size of each individual attribute value in first call
rv = pkcs11.C_GetAttributeValue(session, objectId, template, Convert.ToUInt32(template.Length));
if (rv != CKR.CKR_OK)
Assert.Fail(rv.ToString());
// In LowLevelAPI we have to allocate unmanaged memory for attribute value
for (int i = 0; i < template.Length; i++)
template[i].value = UnmanagedMemory.Allocate(Convert.ToInt32(template[i].valueLen));
// Get attribute value in second call
rv = pkcs11.C_GetAttributeValue(session, objectId, template, Convert.ToUInt32(template.Length));
if (rv != CKR.CKR_OK)
Assert.Fail(rv.ToString());
// Do something interesting with attribute value
byte[] ckaLabel = UnmanagedMemory.Read(template[0].value, Convert.ToInt32(template[0].valueLen));
Assert.IsTrue(Convert.ToBase64String(ckaLabel) == Convert.ToBase64String(Settings.ApplicationNameArray));
// In LowLevelAPI we have to free unmanaged memory taken by attributes
for (int i = 0; i < template.Length; i++)
{
UnmanagedMemory.Free(ref template[i].value);
template[i].valueLen = 0;
}
rv = pkcs11.C_DestroyObject(session, objectId);
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());
}
}