generatePrivate(KeySpec keySpec)
{
if (!(keySpec is PKCS8EncodedKeySpec))
{
throw new net.named_data.jndn.util.InvalidKeySpecException
("RsaKeyFactory.generatePrivate expects a PKCS8EncodedKeySpec");
}
try {
// Decode the PKCS #8 private key.
var parsedNode = DerNode.parse(new ByteBuffer(((PKCS8EncodedKeySpec)keySpec).KeyDer), 0);
var pkcs8Children = parsedNode.getChildren();
var algorithmIdChildren = DerNode.getSequence(pkcs8Children, 1).getChildren();
var oidString = ((DerNode.DerOid)algorithmIdChildren[0]).toVal().ToString();
var rsaPrivateKeyDer = ((DerNode)pkcs8Children[2]).getPayload();
if (oidString != RSA_ENCRYPTION_OID)
{
throw new net.named_data.jndn.util.InvalidKeySpecException
("The PKCS #8 private key is not RSA_ENCRYPTION");
}
// Decode the PKCS #1 RSAPrivateKey.
parsedNode = DerNode.parse(rsaPrivateKeyDer.buf(), 0);
var rsaPrivateKeyChildren = parsedNode.getChildren();
// Copy the parameters.
RSAParameters parameters = new RSAParameters();
var modulus = getIntegerArrayWithoutLeadingZero(((DerNode)rsaPrivateKeyChildren[1]).getPayload());
parameters.Modulus = modulus;
parameters.Exponent = getIntegerArrayWithoutLeadingZero(((DerNode)rsaPrivateKeyChildren[2]).getPayload());
// RSAParameters expects the integer array of the correct length.
parameters.D = getIntegerArrayOfSize(((DerNode)rsaPrivateKeyChildren[3]).getPayload(), modulus.Length);
parameters.P = getIntegerArrayOfSize(((DerNode)rsaPrivateKeyChildren[4]).getPayload(), modulus.Length / 2);
parameters.Q = getIntegerArrayOfSize(((DerNode)rsaPrivateKeyChildren[5]).getPayload(), modulus.Length / 2);
parameters.DP = getIntegerArrayOfSize(((DerNode)rsaPrivateKeyChildren[6]).getPayload(), modulus.Length / 2);
parameters.DQ = getIntegerArrayOfSize(((DerNode)rsaPrivateKeyChildren[7]).getPayload(), modulus.Length / 2);
parameters.InverseQ = getIntegerArrayOfSize(((DerNode)rsaPrivateKeyChildren[8]).getPayload(), modulus.Length / 2);
return(new RsaSecurityPrivateKey(parameters));
} catch (DerDecodingException ex) {
throw new net.named_data.jndn.util.InvalidKeySpecException
("RsaKeyFactory.generatePrivate error decoding the private key DER: " + ex);
}
}
generatePublic(KeySpec keySpec)
{
if (!(keySpec is X509EncodedKeySpec))
{
throw new net.named_data.jndn.util.InvalidKeySpecException
("RsaKeyFactory.generatePublic expects a X509EncodedKeySpec");
}
try {
// Decode the X.509 public key.
var parsedNode = DerNode.parse(new ByteBuffer(((X509EncodedKeySpec)keySpec).KeyDer), 0);
var rootChildren = parsedNode.getChildren();
var algorithmIdChildren = DerNode.getSequence(rootChildren, 0).getChildren();
var oidString = ((DerNode.DerOid)algorithmIdChildren[0]).toVal().ToString();
var rsaPublicKeyDerBitString = ((DerNode)rootChildren[1]).getPayload();
if (oidString != RSA_ENCRYPTION_OID)
{
throw new net.named_data.jndn.util.InvalidKeySpecException
("The PKCS #8 private key is not RSA_ENCRYPTION");
}
// Decode the PKCS #1 RSAPublicKey.
// Skip the leading 0 byte in the DER BitString.
parsedNode = DerNode.parse(rsaPublicKeyDerBitString.buf(), 1);
var rsaPublicKeyChildren = parsedNode.getChildren();
// Copy the parameters.
RSAParameters parameters = new RSAParameters();
parameters.Modulus = getIntegerArrayWithoutLeadingZero(((DerNode)rsaPublicKeyChildren[0]).getPayload());
parameters.Exponent = getIntegerArrayWithoutLeadingZero(((DerNode)rsaPublicKeyChildren[1]).getPayload());
return(new RsaSecurityPublicKey(parameters));
} catch (DerDecodingException ex) {
throw new net.named_data.jndn.util.InvalidKeySpecException
("RsaKeyFactory.generatePublic error decoding the public key DER: " + ex);
}
}