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48 lines
1.9 KiB
48 lines
1.9 KiB
// 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> or |
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/// <tt>verifier.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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