ndn_Error
ndn_decodeTlvSignatureInfo
(struct ndn_Signature *signatureInfo, struct ndn_TlvDecoder *decoder)
{
ndn_Error error;
size_t beginOffset;
size_t endOffset;
uint64_t signatureType;
int gotExpectedType;
ndn_Signature_clear(signatureInfo);
beginOffset = decoder->offset;
if ((error = ndn_TlvDecoder_readNestedTlvsStart
(decoder, ndn_Tlv_SignatureInfo, &endOffset)))
return error;
if ((error = ndn_TlvDecoder_readNonNegativeIntegerTlv
(decoder, ndn_Tlv_SignatureType, &signatureType)))
return error;
if (signatureType == ndn_Tlv_SignatureType_SignatureSha256WithRsa ||
signatureType == ndn_Tlv_SignatureType_SignatureSha256WithEcdsa ||
signatureType == ndn_Tlv_SignatureType_SignatureHmacWithSha256) {
// Assume that the ndn_SignatureType enum has the same values as the TLV
// signature types.
signatureInfo->type = signatureType;
if ((error = ndn_decodeTlvKeyLocator
(ndn_Tlv_KeyLocator, &signatureInfo->keyLocator, decoder)))
return error;
if ((error = ndn_TlvDecoder_peekType
(decoder, ndn_Tlv_ValidityPeriod_ValidityPeriod, endOffset,
&gotExpectedType)))
return error;
if (gotExpectedType) {
if ((error = decodeValidityPeriod(&signatureInfo->validityPeriod, decoder)))
return error;
}
}
else if (signatureType == ndn_Tlv_SignatureType_DigestSha256)
signatureInfo->type = ndn_SignatureType_DigestSha256Signature;
else {
signatureInfo->type = ndn_SignatureType_Generic;
signatureInfo->genericTypeCode = signatureType;
// Get the bytes of the SignatureInfo TLV.
if ((error = ndn_TlvDecoder_getSlice
(decoder, beginOffset, endOffset, &signatureInfo->signatureInfoEncoding)))
return error;
}
if ((error = ndn_TlvDecoder_finishNestedTlvs(decoder, endOffset)))
return error;
return NDN_ERROR_success;
}
static ndn_Error
decodeSelectors(struct ndn_Interest *interest, struct ndn_TlvDecoder *decoder)
{
ndn_Error error;
size_t endOffset;
int gotExpectedType;
if ((error = ndn_TlvDecoder_readNestedTlvsStart(decoder, ndn_Tlv_Selectors, &endOffset)))
return error;
if ((error = ndn_TlvDecoder_readOptionalNonNegativeIntegerTlv
(decoder, ndn_Tlv_MinSuffixComponents, endOffset, &interest->minSuffixComponents)))
return error;
if ((error = ndn_TlvDecoder_readOptionalNonNegativeIntegerTlv
(decoder, ndn_Tlv_MaxSuffixComponents, endOffset, &interest->maxSuffixComponents)))
return error;
if ((error = ndn_TlvDecoder_peekType
(decoder, ndn_Tlv_PublisherPublicKeyLocator, endOffset, &gotExpectedType)))
return error;
if (gotExpectedType) {
if ((error = ndn_decodeTlvKeyLocator
(ndn_Tlv_PublisherPublicKeyLocator, &interest->keyLocator, decoder)))
return error;
}
else
// Clear the key locator.
ndn_KeyLocator_initialize(&interest->keyLocator, interest->keyLocator.keyName.components, interest->keyLocator.keyName.maxComponents);
if ((error = ndn_TlvDecoder_peekType(decoder, ndn_Tlv_Exclude, endOffset, &gotExpectedType)))
return error;
if (gotExpectedType) {
if ((error = decodeExclude(&interest->exclude, decoder)))
return error;
}
else
interest->exclude.nEntries = 0;
if ((error = ndn_TlvDecoder_readOptionalNonNegativeIntegerTlv
(decoder, ndn_Tlv_ChildSelector, endOffset, &interest->childSelector)))
return error;
if ((error = ndn_TlvDecoder_readBooleanTlv
(decoder, ndn_Tlv_MustBeFresh, endOffset, &interest->mustBeFresh)))
return error;
if ((error = ndn_TlvDecoder_finishNestedTlvs(decoder, endOffset)))
return error;
return NDN_ERROR_success;
}
