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/*****************************************************************************
* Copyright 2005 Alt-N Technologies, Ltd.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* This code incorporates intellectual property owned by Yahoo! and licensed
* pursuant to the Yahoo! DomainKeys Patent License Agreement.
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Changes done by ¢feh@fehcom.de obeying the above license
*
*****************************************************************************/
#ifndef DKIMSIGN_H
#define DKIMSIGN_H
#include <openssl/evp.h>
#include "dkim.h"
#include "dkimbase.h"
class CDKIMSign : public CDKIMBase {
public:
CDKIMSign();
~CDKIMSign();
//int Init() = delete;
int Init(DKIMSignOptions *pOptions);
int GetSig2(char *szRSAPrivKey, char *szECCPrivKey, char **pszSignature);
virtual int ProcessHeaders(void) override;
virtual int ProcessBody(char *szBuffer, int nBufLength, bool bEOF) override;
enum CKDKIMConstants {
OptimalHeaderLineLength = 65
};
void Hash(const char *szBuffer, int nBufLength, bool bHdr);
protected:
bool SignThisTag(const std::string& sTag);
void GetHeaderParams(const std::string& sHdr);
void ProcessHeader(const std::string& sHdr);
bool ParseFromAddress(void);
void InitSig(void);
void AddTagToSig(const char *const Tag, const std::string& sValue, char cbrk, bool bFold);
void AddTagToSig(const char *const Tag, unsigned long nValue);
void AddInterTagSpace(int nSizeOfNextTag);
void AddFoldedValueToSig(const std::string& sValue, char cbrk);
bool IsRequiredHeader(const std::string& sTag);
int ConstructSignature(char *szSignKey, int nSigAlg);
int AssembleReturnedSig(char *szRSAPrivKey, char *szECCPrivKey);
#if ( \
(OPENSSL_VERSION_NUMBER < 0x10100000L) \
|| (LIBRESSL_VERSION_NUMBER > 0 && LIBRESSL_VERSION_NUMBER < 0x20700000L))
EVP_MD_CTX m_Hdr_sha1ctx; // the RSA SHA1 signature
EVP_MD_CTX m_Hdr_sha256ctx; // the RSA SHA256 signature
EVP_MD_CTX m_Bdy_sha1ctx; // the SHA1 digest
EVP_MD_CTX m_Bdy_sha256ctx; // the SHA256 digest
#else
EVP_MD_CTX *m_Hdr_sha1ctx; // the RSA SHA1 signature
EVP_MD_CTX *m_Hdr_sha256ctx; // the RSA SHA256 signature
EVP_MD_CTX *m_Hdr_ed25519ctx; // the PureEd25519 signature
EVP_MD_CTX *m_Bdy_sha1ctx; // the SHA1 digest
EVP_MD_CTX *m_Bdy_sha256ctx; // the SHA256 digest for RSA
EVP_MD_CTX *m_Edy_sha256ctx; // the SHA256 digest for Ed25519
#endif
int m_Canon; // canonization method
int m_EmptyLineCount;
std::string hParam;
std::string sFrom;
std::string sSender;
std::string sSelector;
std::string eSelector; // Used for Ed25519 signatures
std::string sDomain;
std::string sIdentity; // for i= tag, if empty tag will not be included in sig
std::string sRequiredHeaders;
bool m_IncludeBodyLengthTag;
int m_nBodyLength;
time_t m_ExpireTime;
int m_nIncludeTimeStamp; // 0 = don't include t= tag, 1 = include t= tag
int m_nIncludeQueryMethod; // 0 = don't include q= tag, 1 = include q= tag
int m_nHash; // use one of the DKIM_HASH_xx constants here
int m_nIncludeCopiedHeaders; // 0 = don't include z= tag, 1 = include z= tag
DKIMHEADERCALLBACK m_pfnHdrCallback;
std::string m_sSig; // DKIM-Signature ....
int m_nSigPos;
std::string m_sReturnedSig;
bool m_bReturnedSigAssembled;
std::string m_sCopiedHeaders;
std::string SigHdrs;
int m_SigHdrs;
};
#endif // DKIMSIGN_H
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