From cb4a46e7fbe62d788e66ed6121c717a2d22a4d7c Mon Sep 17 00:00:00 2001
From: watcherhd <watcherhd@e753b5eb-9565-29b2-b5c5-2cc6f99dfbcb>
Date: Thu, 21 Apr 2011 14:14:52 +0000
Subject: svn.miranda.im is moving to a new home!

git-svn-id: http://miranda-plugins.googlecode.com/svn/trunk@7 e753b5eb-9565-29b2-b5c5-2cc6f99dfbcb
---
 cryptopp/crypto/hmac.cpp | 86 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 86 insertions(+)
 create mode 100644 cryptopp/crypto/hmac.cpp

(limited to 'cryptopp/crypto/hmac.cpp')

diff --git a/cryptopp/crypto/hmac.cpp b/cryptopp/crypto/hmac.cpp
new file mode 100644
index 0000000..a25eb74
--- /dev/null
+++ b/cryptopp/crypto/hmac.cpp
@@ -0,0 +1,86 @@
+// hmac.cpp - written and placed in the public domain by Wei Dai
+
+#include "pch.h"
+
+#ifndef CRYPTOPP_IMPORTS
+
+#include "hmac.h"
+
+NAMESPACE_BEGIN(CryptoPP)
+
+void HMAC_Base::UncheckedSetKey(const byte *userKey, unsigned int keylength, const NameValuePairs &)
+{
+	AssertValidKeyLength(keylength);
+
+	Restart();
+
+	HashTransformation &hash = AccessHash();
+	unsigned int blockSize = hash.BlockSize();
+
+	if (!blockSize)
+		throw InvalidArgument("HMAC: can only be used with a block-based hash function");
+
+	m_buf.resize(2*AccessHash().BlockSize() + AccessHash().DigestSize());
+
+	if (keylength <= blockSize)
+		memcpy(AccessIpad(), userKey, keylength);
+	else
+	{
+		AccessHash().CalculateDigest(AccessIpad(), userKey, keylength);
+		keylength = hash.DigestSize();
+	}
+
+	assert(keylength <= blockSize);
+	memset(AccessIpad()+keylength, 0, blockSize-keylength);
+
+	for (unsigned int i=0; i<blockSize; i++)
+	{
+		AccessOpad()[i] = AccessIpad()[i] ^ 0x5c;
+		AccessIpad()[i] ^= 0x36;
+	}
+}
+
+void HMAC_Base::KeyInnerHash()
+{
+	assert(!m_innerHashKeyed);
+	HashTransformation &hash = AccessHash();
+	hash.Update(AccessIpad(), hash.BlockSize());
+	m_innerHashKeyed = true;
+}
+
+void HMAC_Base::Restart()
+{
+	if (m_innerHashKeyed)
+	{
+		AccessHash().Restart();
+		m_innerHashKeyed = false;
+	}
+}
+
+void HMAC_Base::Update(const byte *input, size_t length)
+{
+	if (!m_innerHashKeyed)
+		KeyInnerHash();
+	AccessHash().Update(input, length);
+}
+
+void HMAC_Base::TruncatedFinal(byte *mac, size_t size)
+{
+	ThrowIfInvalidTruncatedSize(size);
+
+	HashTransformation &hash = AccessHash();
+
+	if (!m_innerHashKeyed)
+		KeyInnerHash();
+	hash.Final(AccessInnerHash());
+
+	hash.Update(AccessOpad(), hash.BlockSize());
+	hash.Update(AccessInnerHash(), hash.DigestSize());
+	hash.TruncatedFinal(mac, size);
+
+	m_innerHashKeyed = false;
+}
+
+NAMESPACE_END
+
+#endif
-- 
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