/// <summary>
/// Use wireFormat.decodeSignatureInfoAndValue to decode the last two name
/// components of the signed interest. Look in the IdentityStorage for the
/// public key with the name in the KeyLocator (if available) and use it to
/// verify the interest. If the public key can't be found, call onVerifyFailed.
/// </summary>
///
/// <param name="interest">The interest with the signature to check.</param>
/// <param name="stepCount"></param>
/// <param name="onVerified">NOTE: The library will log any exceptions thrown by this callback, but for better error handling the callback should catch and properly handle any exceptions.</param>
/// <param name="onValidationFailed">onValidationFailed.onInterestValidationFailed(interest, reason). NOTE: The library will log any exceptions thrown by this callback, but for better error handling the callback should catch and properly handle any exceptions.</param>
/// <returns>null for no further step for looking up a certificate chain.</returns>
public override ValidationRequest checkVerificationPolicy(Interest interest,
int stepCount, OnVerifiedInterest onVerified,
OnInterestValidationFailed onValidationFailed, WireFormat wireFormat)
{
if (interest.getName().size() < 2) {
try {
onValidationFailed.onInterestValidationFailed(interest,
"The signed interest has less than 2 components: "
+ interest.getName().toUri());
} catch (Exception exception) {
logger_.log(ILOG.J2CsMapping.Util.Logging.Level.SEVERE,
"Error in onInterestValidationFailed", exception);
}
return null;
}
// Decode the last two name components of the signed interest
Signature signature;
try {
signature = wireFormat.decodeSignatureInfoAndValue(interest
.getName().get(-2).getValue().buf(), interest.getName()
.get(-1).getValue().buf(), false);
} catch (EncodingException ex) {
logger_.log(
ILOG.J2CsMapping.Util.Logging.Level.INFO,
"Cannot decode the signed interest SignatureInfo and value",
ex);
try {
onValidationFailed.onInterestValidationFailed(interest,
"Error decoding the signed interest signature: " + ex);
} catch (Exception exception_0) {
logger_.log(ILOG.J2CsMapping.Util.Logging.Level.SEVERE,
"Error in onInterestValidationFailed", exception_0);
}
return null;
}
String[] failureReason = new String[] { "unknown" };
// wireEncode returns the cached encoding if available.
if (verify(signature, interest.wireEncode(wireFormat), failureReason)) {
try {
onVerified.onVerifiedInterest(interest);
} catch (Exception ex_1) {
logger_.log(ILOG.J2CsMapping.Util.Logging.Level.SEVERE, "Error in onVerifiedInterest", ex_1);
}
} else {
try {
onValidationFailed.onInterestValidationFailed(interest,
failureReason[0]);
} catch (Exception ex_2) {
logger_.log(ILOG.J2CsMapping.Util.Logging.Level.SEVERE,
"Error in onInterestValidationFailed", ex_2);
}
}
// No more steps, so return a null ValidationRequest.
return null;
}
/// <summary>
/// Extract the signature information from the interest name.
/// </summary>
///
/// <param name="interest">The interest whose signature is needed.</param>
/// <param name="wireFormat"></param>
/// <param name="failureReason"></param>
/// <returns>A shared_ptr for the Signature object. This is null if can't decode.</returns>
private static Signature extractSignature(Interest interest,
WireFormat wireFormat, String[] failureReason)
{
if (interest.getName().size() < 2) {
failureReason[0] = "The signed interest has less than 2 components: "
+ interest.getName().toUri();
return null;
}
try {
return wireFormat.decodeSignatureInfoAndValue(interest.getName()
.get(-2).getValue().buf(), interest.getName().get(-1)
.getValue().buf(), false);
} catch (EncodingException ex) {
failureReason[0] = "Error decoding the signed interest signature: "
+ ex;
return null;
}
}