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diff --git a/src/libzrtpcpp/ZrtpPacketDHPart.h b/src/libzrtpcpp/ZrtpPacketDHPart.h
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+/*
+ Copyright (C) 2006-2007 Werner Dittmann
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef _ZRTPPACKETDHPART_H_
+#define _ZRTPPACKETDHPART_H_
+
+/**
+ * @file ZrtpPacketDHPart.h
+ * @brief The ZRTP DHPart message
+ *
+ * @ingroup GNU_ZRTP
+ * @{
+ */
+
+#include <libzrtpcpp/ZrtpPacketBase.h>
+
+/**
+ * Implement the DHPart packet.
+ *
+ * The ZRTP message DHPart. The implementation sends this
+ * to exchange the Diffie-Helman public keys and the shared
+ * secrets between the two parties.
+ *
+ * @author Werner Dittmann <Werner.Dittmann@t-online.de>
+ */
+
+class __EXPORT ZrtpPacketDHPart : public ZrtpPacketBase {
+
+ protected:
+ uint8_t *pv; ///< points to public key value inside DH message
+ DHPart_t* DHPartHeader; ///< points to DH message structure
+ int32_t dhLength; ///< length of DH message, DH message has variable length
+
+ public:
+ /// Creates a DHPart packet no data, must use setPubKeyType(...)
+ ZrtpPacketDHPart();
+
+ /// Creates a DHPart packet with default data and a give public key type
+ ZrtpPacketDHPart(const char* pkt);
+
+ /// Creates a DHPart packet from received data
+ ZrtpPacketDHPart(uint8_t* data);
+
+ /// Standard destructor
+ virtual ~ZrtpPacketDHPart();
+
+ /// Get pointer to public key value, variable length byte array
+ uint8_t* getPv() { return pv; }
+
+ /// Get pointer to first retained secretd id, fixed length byte array
+ uint8_t* getRs1Id() { return DHPartHeader->rs1Id; };
+
+ /// Get pointer to second retained secretd id, fixed length byte array
+ uint8_t* getRs2Id() { return DHPartHeader->rs2Id; };
+
+ /// Get pointer to additional retained secretd id, fixed length byte array
+ uint8_t* getAuxSecretId() { return DHPartHeader->auxSecretId; };
+
+ /// Get pointer to PBX retained secretd id, fixed length byte array
+ uint8_t* getPbxSecretId() { return DHPartHeader->pbxSecretId; };
+
+ /// Get pointer to first hash (H1) for hash chain, fixed length byte array
+ uint8_t* getH1() { return DHPartHeader->hashH1; };
+
+ /// Get pointer to HMAC, fixed length byte array
+ uint8_t* getHMAC() { return pv+dhLength; };
+
+ /// Setpublic key value, variable length byte array
+ void setPv(uint8_t* text) { memcpy(pv, text, dhLength); };
+
+ /// Set first retained secretd id, fixed length byte array
+ void setRs1Id(uint8_t* text) { memcpy(DHPartHeader->rs1Id, text, sizeof(DHPartHeader->rs1Id)); };
+
+ /// Set second retained secretd id, fixed length byte array
+ void setRs2Id(uint8_t* text) { memcpy(DHPartHeader->rs2Id, text, sizeof(DHPartHeader->rs2Id)); };
+
+ /// Set additional retained secretd id, fixed length byte array
+ void setAuxSecretId(uint8_t* t) { memcpy(DHPartHeader->auxSecretId, t, sizeof(DHPartHeader->auxSecretId)); };
+
+ /// Set PBX retained secretd id, fixed length byte array
+ void setPbxSecretId(uint8_t* t) { memcpy(DHPartHeader->pbxSecretId,t, sizeof(DHPartHeader->pbxSecretId)); };
+
+ /// Set first hash (H1) of hash chain, fixed length byte array
+ void setH1(uint8_t* t) { memcpy(DHPartHeader->hashH1, t, sizeof(DHPartHeader->hashH1)); };
+
+ /// Set key agreement type, fixed size character array
+ void setPubKeyType(const char* pkt);
+
+ /// Set first MAC, fixed length byte array
+ void setHMAC(uint8_t* t) { memcpy(pv+dhLength, t, 2*ZRTP_WORD_SIZE); };
+
+ private:
+ void initialize();
+ // SupportedPubKeys pktype;
+ // DHPart packet is of variable length. It maximum size is 141 words:
+ // - 13 words fixed sizze
+ // - up to 128 words variable part, depending on DH algorithm
+ // leads to a maximum of 4*141=564 bytes.
+ uint8_t data[768]; // large enough to hold a full blown DHPart packet
+};
+
+/**
+ * @}
+ */
+#endif // ZRTPPACKETDHPART
+