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authormadmaxoft@gmail.com <madmaxoft@gmail.com@0a769ca7-a7f5-676a-18bf-c427514a06d6>2012-08-30 23:06:13 +0200
committermadmaxoft@gmail.com <madmaxoft@gmail.com@0a769ca7-a7f5-676a-18bf-c427514a06d6>2012-08-30 23:06:13 +0200
commit539364846a89987ac2679988653f50332cb91d26 (patch)
treef1695473c1f493a19c5fbdb70f7f1faccf99d7f3 /CryptoPP/emsa2.h
parentUpdated to V6 - "Stop" and "Progress report" functionality (diff)
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-rw-r--r--CryptoPP/emsa2.h86
1 files changed, 86 insertions, 0 deletions
diff --git a/CryptoPP/emsa2.h b/CryptoPP/emsa2.h
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+++ b/CryptoPP/emsa2.h
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+#ifndef CRYPTOPP_EMSA2_H
+#define CRYPTOPP_EMSA2_H
+
+/** \file
+ This file contains various padding schemes for public key algorithms.
+*/
+
+#include "cryptlib.h"
+#include "pubkey.h"
+
+#ifdef CRYPTOPP_IS_DLL
+#include "sha.h"
+#endif
+
+NAMESPACE_BEGIN(CryptoPP)
+
+template <class H> class EMSA2HashId
+{
+public:
+ static const byte id;
+};
+
+template <class BASE>
+class EMSA2HashIdLookup : public BASE
+{
+public:
+ struct HashIdentifierLookup
+ {
+ template <class H> struct HashIdentifierLookup2
+ {
+ static HashIdentifier Lookup()
+ {
+ return HashIdentifier(&EMSA2HashId<H>::id, 1);
+ }
+ };
+ };
+};
+
+// EMSA2HashId can be instantiated with the following classes.
+class SHA1;
+class RIPEMD160;
+class RIPEMD128;
+class SHA256;
+class SHA384;
+class SHA512;
+class Whirlpool;
+class SHA224;
+// end of list
+
+#ifdef CRYPTOPP_IS_DLL
+CRYPTOPP_DLL_TEMPLATE_CLASS EMSA2HashId<SHA1>;
+CRYPTOPP_DLL_TEMPLATE_CLASS EMSA2HashId<SHA224>;
+CRYPTOPP_DLL_TEMPLATE_CLASS EMSA2HashId<SHA256>;
+CRYPTOPP_DLL_TEMPLATE_CLASS EMSA2HashId<SHA384>;
+CRYPTOPP_DLL_TEMPLATE_CLASS EMSA2HashId<SHA512>;
+#endif
+
+//! _
+class CRYPTOPP_DLL EMSA2Pad : public EMSA2HashIdLookup<PK_DeterministicSignatureMessageEncodingMethod>
+{
+public:
+ static const char * CRYPTOPP_API StaticAlgorithmName() {return "EMSA2";}
+
+ size_t MinRepresentativeBitLength(size_t hashIdentifierLength, size_t digestLength) const
+ {return 8*digestLength + 31;}
+
+ void ComputeMessageRepresentative(RandomNumberGenerator &rng,
+ const byte *recoverableMessage, size_t recoverableMessageLength,
+ HashTransformation &hash, HashIdentifier hashIdentifier, bool messageEmpty,
+ byte *representative, size_t representativeBitLength) const;
+};
+
+//! EMSA2, for use with RWSS and RSA_ISO
+/*! Only the following hash functions are supported by this signature standard:
+ \dontinclude emsa2.h
+ \skip EMSA2HashId can be instantiated
+ \until end of list
+*/
+struct P1363_EMSA2 : public SignatureStandard
+{
+ typedef EMSA2Pad SignatureMessageEncodingMethod;
+};
+
+NAMESPACE_END
+
+#endif