/// <summary>
/// Extract the signature information from the interest name.
/// </summary>
///
/// <param name="interest">The interest whose signature is needed.</param>
/// <param name="wireFormat"></param>
/// <returns>The Signature object, or null if can't decode.</returns>
private static Signature extractSignature(Interest interest,
WireFormat wireFormat)
{
if (interest.getName().size() < 2)
{
return(null);
}
try {
return(wireFormat.decodeSignatureInfoAndValue(interest.getName()
.get(-2).getValue().buf(), interest.getName().get(-1)
.getValue().buf(), false));
} catch (EncodingException ex) {
return(null);
}
}
/// <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="onVerifyFailed">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,
OnVerifyInterestFailed onVerifyFailed, WireFormat wireFormat)
{
// Decode the last two name components of the signed interest
net.named_data.jndn.Signature signature;
try {
signature = wireFormat.decodeSignatureInfoAndValue(interest
.getName().get(-2).getValue().buf(), interest.getName()
.get(-1).getValue().buf());
} catch (EncodingException ex) {
logger_.log(
ILOG.J2CsMapping.Util.Logging.Level.INFO,
"Cannot decode the signed interest SignatureInfo and value",
ex);
try {
onVerifyFailed.onVerifyInterestFailed(interest);
} catch (Exception exception) {
logger_.log(ILOG.J2CsMapping.Util.Logging.Level.SEVERE, "Error in onVerifyInterestFailed",
exception);
}
return(null);
}
// wireEncode returns the cached encoding if available.
if (verify(signature, interest.wireEncode(wireFormat)))
{
try {
onVerified.onVerifiedInterest(interest);
} catch (Exception ex_0) {
logger_.log(ILOG.J2CsMapping.Util.Logging.Level.SEVERE, "Error in onVerifiedInterest", ex_0);
}
}
else
{
try {
onVerifyFailed.onVerifyInterestFailed(interest);
} catch (Exception ex_1) {
logger_.log(ILOG.J2CsMapping.Util.Logging.Level.SEVERE, "Error in onVerifyInterestFailed", ex_1);
}
}
// No more steps, so return a null ValidationRequest.
return(null);
}
/// <summary>
/// Use wireFormat.decodeSignatureInfoAndValue to decode the last two name
/// components of the signed interest. Look in the IdentityStorage or PibImpl 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
/// onValidationFailed.onInterestValidationFailed.
/// </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);
}