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-rw-r--r--SoftHSMv2/src/lib/crypto/BotanDHPublicKey.cpp146
1 files changed, 146 insertions, 0 deletions
diff --git a/SoftHSMv2/src/lib/crypto/BotanDHPublicKey.cpp b/SoftHSMv2/src/lib/crypto/BotanDHPublicKey.cpp
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+/*
+ * Copyright (c) 2010 .SE (The Internet Infrastructure Foundation)
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+ * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
+ * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*****************************************************************************
+ BotanDHPublicKey.cpp
+
+ Botan Diffie-Hellman public key class
+ *****************************************************************************/
+
+#include "config.h"
+#include "log.h"
+#include "BotanDHPublicKey.h"
+#include "BotanUtil.h"
+#include <string.h>
+
+// Constructors
+BotanDHPublicKey::BotanDHPublicKey()
+{
+ dh = NULL;
+}
+
+BotanDHPublicKey::BotanDHPublicKey(const Botan::DH_PublicKey* inDH)
+{
+ dh = NULL;
+
+ setFromBotan(inDH);
+}
+
+// Destructor
+BotanDHPublicKey::~BotanDHPublicKey()
+{
+ delete dh;
+}
+
+// The type
+/*static*/ const char* BotanDHPublicKey::type = "Botan DH Public Key";
+
+// Set from Botan representation
+void BotanDHPublicKey::setFromBotan(const Botan::DH_PublicKey* inDH)
+{
+ ByteString inP = BotanUtil::bigInt2ByteString(inDH->group_p());
+ setP(inP);
+ ByteString inG = BotanUtil::bigInt2ByteString(inDH->group_g());
+ setG(inG);
+ ByteString inY = BotanUtil::bigInt2ByteString(inDH->get_y());
+ setY(inY);
+}
+
+// Check if the key is of the given type
+bool BotanDHPublicKey::isOfType(const char* inType)
+{
+ return !strcmp(type, inType);
+}
+
+// Setters for the DH public key components
+void BotanDHPublicKey::setP(const ByteString& inP)
+{
+ DHPublicKey::setP(inP);
+
+ if (dh)
+ {
+ delete dh;
+ dh = NULL;
+ }
+}
+
+void BotanDHPublicKey::setG(const ByteString& inG)
+{
+ DHPublicKey::setG(inG);
+
+ if (dh)
+ {
+ delete dh;
+ dh = NULL;
+ }
+}
+
+void BotanDHPublicKey::setY(const ByteString& inY)
+{
+ DHPublicKey::setY(inY);
+
+ if (dh)
+ {
+ delete dh;
+ dh = NULL;
+ }
+}
+
+// Retrieve the Botan representation of the key
+Botan::DH_PublicKey* BotanDHPublicKey::getBotanKey()
+{
+ if (!dh)
+ {
+ createBotanKey();
+ }
+
+ return dh;
+}
+
+// Create the Botan representation of the key
+void BotanDHPublicKey::createBotanKey()
+{
+ // We actually do not need to check q, since it can be set zero
+ if (p.size() != 0 && y.size() != 0)
+ {
+ if (dh)
+ {
+ delete dh;
+ dh = NULL;
+ }
+
+ try
+ {
+ dh = new Botan::DH_PublicKey(Botan::DL_Group(BotanUtil::byteString2bigInt(p),
+ BotanUtil::byteString2bigInt(g)),
+ BotanUtil::byteString2bigInt(y));
+ }
+ catch (...)
+ {
+ ERROR_MSG("Could not create the Botan public key");
+ }
+ }
+}