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authorbertagaz <bertagaz@ptitcanardnoir.org>2011-06-14 15:26:19 +0200
committerbertagaz <bertagaz@ptitcanardnoir.org>2011-06-14 15:26:19 +0200
commit30e9097985656920f01a72efc1088caa2b8d41b3 (patch)
treebedbdb1aaa484af467e538110ab4c0c95985b6b8 /embeddedcryptopp/cbcmac.h
Imported Upstream version 0.5.29upstream/0.5.29
Diffstat (limited to 'embeddedcryptopp/cbcmac.h')
-rw-r--r--embeddedcryptopp/cbcmac.h50
1 files changed, 50 insertions, 0 deletions
diff --git a/embeddedcryptopp/cbcmac.h b/embeddedcryptopp/cbcmac.h
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+++ b/embeddedcryptopp/cbcmac.h
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+#ifndef CRYPTOPP_CBCMAC_H
+#define CRYPTOPP_CBCMAC_H
+
+#include "seckey.h"
+#include "secblock.h"
+
+NAMESPACE_BEGIN(CryptoPP)
+
+//! _
+class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE CBC_MAC_Base : public MessageAuthenticationCode
+{
+public:
+ CBC_MAC_Base() {}
+
+ void UncheckedSetKey(const byte *key, unsigned int length, const NameValuePairs &params);
+ void Update(const byte *input, size_t length);
+ void TruncatedFinal(byte *mac, size_t size);
+ unsigned int DigestSize() const {return const_cast<CBC_MAC_Base*>(this)->AccessCipher().BlockSize();}
+
+protected:
+ virtual BlockCipher & AccessCipher() =0;
+
+private:
+ void ProcessBuf();
+ SecByteBlock m_reg;
+ unsigned int m_counter;
+};
+
+//! <a href="http://www.weidai.com/scan-mirror/mac.html#CBC-MAC">CBC-MAC</a>
+/*! Compatible with FIPS 113. T should be a class derived from BlockCipherDocumentation.
+ Secure only for fixed length messages. For variable length messages use CMAC or DMAC.
+*/
+template <class T>
+class CBC_MAC : public MessageAuthenticationCodeImpl<CBC_MAC_Base, CBC_MAC<T> >, public SameKeyLengthAs<T>
+{
+public:
+ CBC_MAC() {}
+ CBC_MAC(const byte *key, size_t length=SameKeyLengthAs<T>::DEFAULT_KEYLENGTH)
+ {this->SetKey(key, length);}
+
+ static std::string StaticAlgorithmName() {return std::string("CBC-MAC(") + T::StaticAlgorithmName() + ")";}
+
+private:
+ BlockCipher & AccessCipher() {return m_cipher;}
+ typename T::Encryption m_cipher;
+};
+
+NAMESPACE_END
+
+#endif