Enterprise Library Test Guide - Willy .Net

Testing the Cryptography Application Block 47
Code test case Implemented? Feature that is implemented
Verify that the
application block
uses performance
counters to monitor
hash and symmetric
operations
when the performance
counters
are enabled.
Yes
Verify that the
application block
uses WMI and the
event log to monitor
errors during
encryption, decryption,
and hash
operations when
WMI and event log
are enabled.
Yes
For example, the SymmtericAlgorithmProvider.Encrypt
method increments the symmetric encryption performance
counter whenever there is a successful encryption
operation. This is shown in the following code
example. The process is similar for hash operations.
public byte[] Encrypt(…)
{
crypto.Encrypt(plaintext);
InstrumentationProvider.FireSymmetricEncryptionPerformed();
}
[InstrumentationConsumer("SymmetricEncryptio
nPerformed")]
public void SymmetricEncryptionPerformed(obje
ct sender, EventArgs e)
{
if (PerformanceCountersEnabled) symmetricEncryptionPerformedCounter.Increment();
}
For example, the SymmtericAlgorithmProvider.Encrypt
method uses WMI and the event log when the encryption
operation fails. This is shown in the following code
example. The process is similar for other operations.
public byte[] Encrypt(…)
{
try
{
output = crypto.Encrypt(plaintext);
}
catch (Exception e)
{
InstrumentationProvider.FireCyptographicOperationFailed(…);
throw;
}
}
[InstrumentationConsumer("CyptographicOperati
onFailed")]
public void CyptographicOperationFailed(…)
{
if (EventLoggingEnabled)
{
EventLog.WriteEntry(GetEventSourceName(),
entryText, EventLogEntryType.Error);
}
if (WmiEnabled) ManagementInstrumentation.
Fire(new SymmetricOperationFailedEvent(…));
}
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