public void _LL_20_02_EncryptAndDecrypt_Gost28147_89_Stream_Test()
{
Helpers.CheckPlatform();
CKR rv = CKR.CKR_OK;
using (RutokenPkcs11Library pkcs11 = new RutokenPkcs11Library(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
NativeULong slotId = Helpers.GetUsableSlot(pkcs11);
NativeULong 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 && rv != CKR.CKR_USER_ALREADY_LOGGED_IN)
{
Assert.Fail(rv.ToString());
}
// Generate symetric key
NativeULong keyId = CK.CK_INVALID_HANDLE;
Helpers.GenerateGost28147_89Key(pkcs11, session, ref keyId);
CK_MECHANISM mechanism = CkmUtils.CreateMechanism(CKM.CKM_GOST28147);
byte[] sourceData = TestData.Encrypt_Gost28147_89_SourceData;
byte[] encryptedData = null;
byte[] decryptedData = null;
// Multipart encryption functions C_EncryptUpdate and C_EncryptFinal can be used i.e. for encryption of streamed data
using (MemoryStream inputStream = new MemoryStream(sourceData), outputStream = new MemoryStream())
{
// Initialize encryption operation
rv = pkcs11.C_EncryptInit(session, ref mechanism, keyId);
if (rv != CKR.CKR_OK)
{
Assert.Fail(rv.ToString());
}
// Prepare buffer for source data part
byte[] part = new byte[8];
// Prepare buffer for encrypted data part
byte[] encryptedPart = new byte[8];
NativeULong encryptedPartLen = Convert.ToUInt64(encryptedPart.Length);
// Read input stream with source data
int bytesRead = 0;
while ((bytesRead = inputStream.Read(part, 0, part.Length)) > 0)
{
// Encrypt each individual source data part
encryptedPartLen = Convert.ToUInt64(encryptedPart.Length);
rv = pkcs11.C_EncryptUpdate(session, part, Convert.ToUInt64(bytesRead), encryptedPart, ref encryptedPartLen);
if (rv != CKR.CKR_OK)
{
Assert.Fail(rv.ToString());
}
// Append encrypted data part to the output stream
outputStream.Write(encryptedPart, 0, Convert.ToInt32(encryptedPartLen));
}
// Get the length of last encrypted data part in first call
byte[] lastEncryptedPart = null;
NativeULong lastEncryptedPartLen = 0;
rv = pkcs11.C_EncryptFinal(session, null, ref lastEncryptedPartLen);
if (rv != CKR.CKR_OK)
{
Assert.Fail(rv.ToString());
}
// Allocate array for the last encrypted data part
lastEncryptedPart = new byte[lastEncryptedPartLen];
// Get the last encrypted data part in second call
rv = pkcs11.C_EncryptFinal(session, lastEncryptedPart, ref lastEncryptedPartLen);
if (rv != CKR.CKR_OK)
{
Assert.Fail(rv.ToString());
}
// Append the last encrypted data part to the output stream
outputStream.Write(lastEncryptedPart, 0, Convert.ToInt32(lastEncryptedPartLen));
// Read whole output stream to the byte array so we can compare results more easily
encryptedData = outputStream.ToArray();
}
// Multipart decryption functions C_DecryptUpdate and C_DecryptFinal can be used i.e. for decryption of streamed data
using (MemoryStream inputStream = new MemoryStream(encryptedData), outputStream = new MemoryStream())
{
// Initialize decryption operation
rv = pkcs11.C_DecryptInit(session, ref mechanism, keyId);
if (rv != CKR.CKR_OK)
{
Assert.Fail(rv.ToString());
}
// Prepare buffer for encrypted data part
byte[] encryptedPart = new byte[8];
// Prepare buffer for decrypted data part
byte[] part = new byte[8];
NativeULong partLen = Convert.ToUInt64(part.Length);
// Read input stream with encrypted data
int bytesRead = 0;
while ((bytesRead = inputStream.Read(encryptedPart, 0, encryptedPart.Length)) > 0)
{
// Decrypt each individual encrypted data part
partLen = Convert.ToUInt64(part.Length);
rv = pkcs11.C_DecryptUpdate(session, encryptedPart, Convert.ToUInt64(bytesRead), part, ref partLen);
if (rv != CKR.CKR_OK)
{
Assert.Fail(rv.ToString());
}
// Append decrypted data part to the output stream
outputStream.Write(part, 0, Convert.ToInt32(partLen));
}
// Get the length of last decrypted data part in first call
byte[] lastPart = null;
NativeULong lastPartLen = 0;
rv = pkcs11.C_DecryptFinal(session, null, ref lastPartLen);
if (rv != CKR.CKR_OK)
{
Assert.Fail(rv.ToString());
}
// Allocate array for the last decrypted data part
lastPart = new byte[lastPartLen];
// Get the last decrypted data part in second call
rv = pkcs11.C_DecryptFinal(session, lastPart, ref lastPartLen);
if (rv != CKR.CKR_OK)
{
Assert.Fail(rv.ToString());
}
// Append the last decrypted data part to the output stream
outputStream.Write(lastPart, 0, Convert.ToInt32(lastPartLen));
// Read whole output stream to the byte array so we can compare results more easily
decryptedData = outputStream.ToArray();
}
Assert.IsTrue(Convert.ToBase64String(sourceData) == Convert.ToBase64String(decryptedData));
// In LowLevelAPI we have to free unmanaged memory taken by mechanism parameter (iv in this case)
UnmanagedMemory.Free(ref mechanism.Parameter);
mechanism.ParameterLen = 0;
rv = pkcs11.C_DestroyObject(session, keyId);
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());
}
}
}