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# pkcspad.h

    00001 #ifndef CRYPTOPP_PKCSPAD_H
    00002 #define CRYPTOPP_PKCSPAD_H
    00003
    00004 #include "cryptlib.h"
    00005 #include "pubkey.h"
    00006
    00007 #ifdef CRYPTOPP_IS_DLL
    00008 #include "sha.h"
    00009 #endif
    00010
    00011 NAMESPACE_BEGIN(CryptoPP)
    00012
    00013 //! <a href="http://www.weidai.com/scan-mirror/ca.html#cem_PKCS1-1.5">EME-PKCS1-v1_5</a>
    00014 class PKCS_EncryptionPaddingScheme : public PK_EncryptionMessageEncodingMethod
    00015 {
    00016 public:
    00017         static const char * StaticAlgorithmName() {return "EME-PKCS1-v1_5";}
    00018
    00019         size_t MaxUnpaddedLength(size_t paddedLength) const;
    00020         void Pad(RandomNumberGenerator &rng, const byte *raw, size_t inputLength, byte *padded, size_t paddedLength, const NameValuePairs &parameters) const;
    00021         DecodingResult Unpad(const byte *padded, size_t paddedLength, byte *raw, const NameValuePairs &parameters) const;
    00022 };
    00023
    00024 template <class H> class PKCS_DigestDecoration
    00025 {
    00026 public:
    00027         static const byte decoration[];
    00028         static const unsigned int length;
    00029 };
    00030
    00031 // PKCS_DigestDecoration can be instantiated with the following
    00032 // classes as specified in PKCS#1 v2.0 and P1363a
    00033 class SHA1;
    00034 class RIPEMD160;
    00035 class Tiger;
    00036 class SHA224;
    00037 class SHA256;
    00038 class SHA384;
    00039 class SHA512;
    00040 namespace Weak1 {
    00041 class MD2;
    00042 class MD5;
    00043 }
    00044 // end of list
    00045
    00046 #ifdef CRYPTOPP_IS_DLL
    00047 CRYPTOPP_DLL_TEMPLATE_CLASS PKCS_DigestDecoration<SHA1>;
    00048 CRYPTOPP_DLL_TEMPLATE_CLASS PKCS_DigestDecoration<SHA224>;
    00049 CRYPTOPP_DLL_TEMPLATE_CLASS PKCS_DigestDecoration<SHA256>;
    00050 CRYPTOPP_DLL_TEMPLATE_CLASS PKCS_DigestDecoration<SHA384>;
    00051 CRYPTOPP_DLL_TEMPLATE_CLASS PKCS_DigestDecoration<SHA512>;
    00052 #endif
    00053
    00054 //! <a href="http://www.weidai.com/scan-mirror/sig.html#sem_PKCS1-1.5">EMSA-PKCS1-v1_5</a>
    00055 class CRYPTOPP_DLL PKCS1v15_SignatureMessageEncodingMethod : public PK_DeterministicSignatureMessageEncodingMethod
    00056 {
    00057 public:
    00058         static const char * CRYPTOPP_API StaticAlgorithmName() {return "EMSA-PKCS1-v1_5";}
    00059
    00060         size_t MinRepresentativeBitLength(size_t hashIdentifierSize, size_t digestSize) const
    00061                 {return 8 * (digestSize + hashIdentifierSize + 10);}
    00062
    00063         void ComputeMessageRepresentative(RandomNumberGenerator &rng,
    00064                 const byte *recoverableMessage, size_t recoverableMessageLength,
    00065                 HashTransformation &hash, HashIdentifier hashIdentifier, bool messageEmpty,
    00066                 byte *representative, size_t representativeBitLength) const;
    00067
    00068         struct HashIdentifierLookup
    00069         {
    00070                 template <class H> struct HashIdentifierLookup2
    00071                 {
    00072                         static HashIdentifier Lookup()
    00073                         {
    00074                                 return HashIdentifier(PKCS_DigestDecoration<H>::decoration, PKCS_DigestDecoration<H>::length);
    00075                         }
    00076                 };
    00077         };
    00078 };
    00079
    00080 //! PKCS #1 version 1.5, for use with RSAES and RSASS
    00081 /*! Only the following hash functions are supported by this signature standard:
    00082         \dontinclude pkcspad.h
    00083         \skip can be instantiated
    00084         \until end of list
    00085 */
    00086 struct PKCS1v15 : public SignatureStandard, public EncryptionStandard
    00087 {
    00088         typedef PKCS_EncryptionPaddingScheme EncryptionMessageEncodingMethod;
    00089         typedef PKCS1v15_SignatureMessageEncodingMethod SignatureMessageEncodingMethod;
    00090 };
    00091
    00092 NAMESPACE_END
    00093
    00094 #endif