示例#1
0
        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);
            }
        }
示例#2
0
        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);
            }
        }