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-rwxr-xr-xlibtransport/src/hicn/transport/utils/signer.h69
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diff --git a/libtransport/src/hicn/transport/utils/signer.h b/libtransport/src/hicn/transport/utils/signer.h
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+/*
+ * Copyright (c) 2017-2019 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <hicn/transport/core/packet.h>
+
+extern "C" {
+#include <parc/security/parc_CryptoHashType.h>
+#include <parc/security/parc_CryptoSuite.h>
+#include <parc/security/parc_KeyStore.h>
+#include <parc/security/parc_Signer.h>
+}
+
+namespace utils {
+
+using Packet = transport::core::Packet;
+
+/**
+ * A signer can use a single key (asymmetric or symmetric) to sign a packet.
+ */
+class Signer {
+ friend class Identity;
+
+ public:
+ /**
+ * Create a Signer
+ *
+ * @param keyStore A keystore containing a private key or simmetric key to
+ * use to sign packet with this Signer.
+ * @param suite CryptoSuite to use to verify the signature
+ */
+ Signer(PARCKeyStore *keyStore, PARCCryptoSuite suite);
+
+ Signer(const PARCSigner *signer);
+
+ ~Signer();
+
+ /**
+ * @brief Sign a packet
+ *
+ * This method is general and must be used for Public-private key signature,
+ * HMAC and CRC.
+ *
+ * @param packet A pointer to the header of the packet to sign. Mutable
+ * field in the packet must be set to 0.
+ * @param key_id Indentifier of the key to use to generate the signature.
+ */
+ void sign(Packet &packet);
+
+ private:
+ PARCSigner *signer_;
+ PARCKeyId *key_id_;
+ static uint8_t zeros[200];
+};
+
+} // namespace utils