You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
66 lines
1.3 KiB
66 lines
1.3 KiB
// dsa.cpp - originally written and placed in the public domain by Wei Dai |
|
|
|
#include "pch.h" |
|
|
|
#ifndef CRYPTOPP_IMPORTS |
|
|
|
#include "dsa.h" |
|
#include "asn.h" |
|
#include "integer.h" |
|
#include "filters.h" |
|
#include "nbtheory.h" |
|
|
|
NAMESPACE_BEGIN(CryptoPP) |
|
|
|
size_t DSAConvertSignatureFormat(byte *buffer, size_t bufferSize, DSASignatureFormat toFormat, const byte *signature, size_t signatureLen, DSASignatureFormat fromFormat) |
|
{ |
|
Integer r, s; |
|
StringStore store(signature, signatureLen); |
|
ArraySink sink(buffer, bufferSize); |
|
|
|
switch (fromFormat) |
|
{ |
|
case DSA_P1363: |
|
r.Decode(store, signatureLen/2); |
|
s.Decode(store, signatureLen/2); |
|
break; |
|
case DSA_DER: |
|
{ |
|
BERSequenceDecoder seq(store); |
|
r.BERDecode(seq); |
|
s.BERDecode(seq); |
|
seq.MessageEnd(); |
|
break; |
|
} |
|
case DSA_OPENPGP: |
|
r.OpenPGPDecode(store); |
|
s.OpenPGPDecode(store); |
|
break; |
|
} |
|
|
|
switch (toFormat) |
|
{ |
|
case DSA_P1363: |
|
r.Encode(sink, bufferSize/2); |
|
s.Encode(sink, bufferSize/2); |
|
break; |
|
case DSA_DER: |
|
{ |
|
DERSequenceEncoder seq(sink); |
|
r.DEREncode(seq); |
|
s.DEREncode(seq); |
|
seq.MessageEnd(); |
|
break; |
|
} |
|
case DSA_OPENPGP: |
|
r.OpenPGPEncode(sink); |
|
s.OpenPGPEncode(sink); |
|
break; |
|
} |
|
|
|
return (size_t)sink.TotalPutLength(); |
|
} |
|
|
|
NAMESPACE_END |
|
|
|
#endif
|
|
|