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49 lines
1.9 KiB
C
49 lines
1.9 KiB
C
// dsa.h - originally written and placed in the public domain by Wei Dai
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/// \file dsa.h
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/// \brief Classes for the DSA signature algorithm
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#ifndef CRYPTOPP_DSA_H
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#define CRYPTOPP_DSA_H
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#include "cryptlib.h"
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#include "gfpcrypt.h"
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NAMESPACE_BEGIN(CryptoPP)
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/// \brief DSA Signature Format
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/// \details The DSA signature format used by Crypto++ is as defined by IEEE P1363.
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/// OpenSSL, Java and .Net use the DER format, and OpenPGP uses the OpenPGP format.
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/// \sa <A HREF="http://www.cryptopp.com/wiki/DSAConvertSignatureFormat">DSAConvertSignatureFormat</A>
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/// on the Crypto++ wiki.
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/// \since Crypto++ 1.0
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enum DSASignatureFormat {
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/// \brief Crypto++ native signature encoding format
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DSA_P1363,
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/// \brief signature encoding format used by OpenSSL, Java and .Net
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DSA_DER,
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/// \brief OpenPGP signature encoding format
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DSA_OPENPGP
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};
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/// \brief Converts between signature encoding formats
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/// \param buffer byte buffer for the converted signature encoding
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/// \param bufferSize the length of the converted signature encoding buffer
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/// \param toFormat the source signature format
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/// \param signature byte buffer for the existing signature encoding
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/// \param signatureLen the length of the existing signature encoding buffer
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/// \param fromFormat the source signature format
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/// \details This function converts between these formats, and returns length
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/// of signature in the target format. If <tt>toFormat == DSA_P1363</tt>, then
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/// <tt>bufferSize</tt> must equal <tt>publicKey.SignatureLength()</tt>
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/// \sa <A HREF="http://www.cryptopp.com/wiki/DSAConvertSignatureFormat">DSAConvertSignatureFormat</A>
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/// on the Crypto++ wiki.
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/// \since Crypto++ 1.0
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size_t DSAConvertSignatureFormat(byte *buffer, size_t bufferSize, DSASignatureFormat toFormat,
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const byte *signature, size_t signatureLen, DSASignatureFormat fromFormat);
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NAMESPACE_END
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#endif // CRYPTOPP_DSA_H
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