Crypto++
5.6.4
Free C++ class library of cryptographic schemes
dsa.h
Go to the documentation of this file.
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.
17
enum
DSASignatureFormat
{
18
//! \brief Crypto++ native signature encoding format
19
DSA_P1363
,
20
//! \brief signature encoding format used by Java and .Net
21
DSA_DER
,
22
//! \brief OpenPGP signature encoding format
23
DSA_OPENPGP
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
DSAConvertSignatureFormat
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
DSASignatureFormat
DSA Signature Format.
Definition:
dsa.h:17
cryptlib.h
Abstract base classes that provide a uniform interface to this library.
DSA_P1363
Crypto++ native signature encoding format.
Definition:
dsa.h:19
DSA_DER
signature encoding format used by Java and .Net
Definition:
dsa.h:21
gfpcrypt.h
Implementation of schemes based on DL over GF(p)
CryptoPP
Crypto++ library namespace.
DSA_OPENPGP
OpenPGP signature encoding format.
Definition:
dsa.h:23
Generated on Fri Jan 28 2022 06:28:57 for Crypto++ by
1.8.13