Crypto++  5.6.3
Free C++ class library of cryptographic schemes
dsa.h
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1 // dsa.h - written and placed in the public domain by Wei Dai
2 
3 //! \file dsa.h
4 //! \brief Classes for the DSA signature algorithm
5 
6 #ifndef CRYPTOPP_DSA_H
7 #define CRYPTOPP_DSA_H
8 
9 #include "cryptlib.h"
10 #include "gfpcrypt.h"
11 
12 NAMESPACE_BEGIN(CryptoPP)
13 
14 //! \brief DSA Signature Format
15 //! \details The DSA signature format used by Crypto++ is as defined by IEEE P1363.
16 //! Java nad .Net use the DER format, and OpenPGP uses the OpenPGP format.
18  //! \brief Crypto++ native signature encoding format
20  //! \brief signature encoding format used by Java and .Net
22  //! \brief OpenPGP signature encoding format
24 };
25 
26 //! \brief Converts between signature encoding formats
27 //! \param buffer byte buffer for the converted signature encoding
28 //! \param bufferSize the length of the converted signature encoding buffer
29 //! \param toFormat the source signature format
30 //! \param signature byte buffer for the existing signature encoding
31 //! \param signatureLen the length of the existing signature encoding buffer
32 //! \param fromFormat the source signature format
33 //! \details This function converts between these formats, and returns length
34 //! of signature in the target format. If <tt>toFormat == DSA_P1363</tt>, then
35 //! <tt>bufferSize</tt> must equal <tt>publicKey.SignatureLength()</tt>
36 size_t DSAConvertSignatureFormat(byte *buffer, size_t bufferSize, DSASignatureFormat toFormat,
37  const byte *signature, size_t signatureLen, DSASignatureFormat fromFormat);
38 
39 NAMESPACE_END
40 
41 #endif
size_t DSAConvertSignatureFormat(byte *buffer, size_t bufferSize, DSASignatureFormat toFormat, const byte *signature, size_t signatureLen, DSASignatureFormat fromFormat)
Converts between signature encoding formats.
Definition: dsa.cpp:15
DSASignatureFormat
DSA Signature Format.
Definition: dsa.h:17
Abstract base classes that provide a uniform interface to this library.
Crypto++ native signature encoding format.
Definition: dsa.h:19
signature encoding format used by Java and .Net
Definition: dsa.h:21
Implementation of schemes based on DL over GF(p)
Crypto++ library namespace.
OpenPGP signature encoding format.
Definition: dsa.h:23