void
PrivateKeyStorage::decodeEcPrivateKey
(const ptr_lib::shared_ptr<DerNode>& algorithmParameters,
const Blob& privateKeyDer, EcPrivateKeyLite& privateKey)
{
// Find the curveId in EC_KEY_INFO.
int curveId = -1;
string oidString = algorithmParameters->toVal().toRawStr();
for (size_t i = 0 ; i < ndn_getEcKeyInfoCount(); ++i) {
const struct ndn_EcKeyInfo *info = ndn_getEcKeyInfo(i);
OID curveOid(info->oidIntegerList, info->oidIntegerListLength);
if (curveOid.toString() == oidString) {
curveId = info->curveId;
break;
}
}
if (curveId == -1)
throw SecurityException
("FilePrivateKeyStorage::decodeEcPrivateKey: Unrecognized EC algorithm parameters");
// Get the value in the octet string.
ptr_lib::shared_ptr<DerNode> parsedNode = DerNode::parse(privateKeyDer.buf(), 0);
DerNode::DerOctetString* octetString = dynamic_cast<DerNode::DerOctetString*>
(parsedNode->getChildren()[1].get());
if (!octetString)
throw SecurityException
("FilePrivateKeyStorage::decodeEcPrivateKey: Can't get the private key octet string");
Blob octetStringValue = octetString->toVal();
ndn_Error error;
if ((error = privateKey.setByCurve(curveId, octetStringValue)))
throw SecurityException
(string("PrivateKeyStorage::decodeEcPrivateKey ") + ndn_getErrorString(error));
}
ec_key_st*
FilePrivateKeyStorage::decodeEcPrivateKey
(const ptr_lib::shared_ptr<DerNode>& algorithmParameters,
const Blob& privateKeyDer)
{
// Find the curveId in EC_KEY_INFO.
int curveId = -1;
string oidString = algorithmParameters->toVal().toRawStr();
for (size_t i = 0 ; i < sizeof(EC_KEY_INFO) / sizeof(EC_KEY_INFO[0]); ++i) {
OID curveOid(EC_KEY_INFO[i].oidIntegerList, EC_KEY_INFO[i].oidIntegerListLength);
if (curveOid.toString() == oidString) {
curveId = EC_KEY_INFO[i].curveId;
break;
}
}
if (curveId == -1)
throw SecurityException
("FilePrivateKeyStorage::decodeEcPrivateKey: Unrecognized EC algorithm parameters");
// Get the value in the octet string.
ptr_lib::shared_ptr<DerNode> parsedNode = DerNode::parse(privateKeyDer.buf(), 0);
DerNode::DerOctetString* octetString = dynamic_cast<DerNode::DerOctetString*>
(parsedNode->getChildren()[1].get());
if (!octetString)
throw SecurityException
("FilePrivateKeyStorage::decodeEcPrivateKey: Can't get the private key octet string");
Blob octetStringValue = octetString->toVal();
BIGNUM* keyBignum = BN_bin2bn(octetStringValue.buf(), octetStringValue.size(), NULL);
if (!keyBignum) {
// We don't expect this to happen.
throw SecurityException
("FilePrivateKeyStorage::decodeEcPrivateKey: Can't create a BIGNUM for the private key value");
}
EC_KEY* privateKey = EC_KEY_new_by_curve_name(curveId);
if (!privateKey) {
// We don't expect this to happen.
BN_free(keyBignum);
throw SecurityException
("FilePrivateKeyStorage::decodeEcPrivateKey: Can't create an EC key for the curve ID");
}
EC_KEY_set_private_key(privateKey, keyBignum);
BN_free(keyBignum);
return privateKey;
}
