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/*
*
* Copyright (C) 1998-2021, OFFIS e.V.
* All rights reserved. See COPYRIGHT file for details.
*
* This software and supporting documentation were developed by
*
* OFFIS e.V.
* R&D Division Health
* Escherweg 2
* D-26121 Oldenburg, Germany
*
*
* Module: dcmsign
*
* Author: Norbert Loxen, Marco Eichelberg
*
* Purpose:
* classes: SiMDMAC
*
*/
#include "dcmtk/config/osconfig.h"
#ifdef WITH_OPENSSL
#include "dcmtk/dcmsign/simdmac.h"
#include "dcmtk/dcmdata/dcerror.h"
BEGIN_EXTERN_C
#include <openssl/evp.h>
END_EXTERN_C
SiMDMAC::SiMDMAC(E_MACType mactype)
: ctx(NULL)
, macType_(mactype)
{
initialize();
}
SiMDMAC::~SiMDMAC()
{
EVP_MD_CTX_destroy(ctx); // This is the same as EVP_MD_CTX_free() in OpenSSL 3.0
}
unsigned long SiMDMAC::getSize() const
{
if (ctx) return EVP_MD_CTX_size(ctx);
return 0;
}
OFCondition SiMDMAC::initialize()
{
EVP_MD_CTX_destroy(ctx); // This is the same as EVP_MD_CTX_free() in OpenSSL 3.0
ctx = EVP_MD_CTX_create(); // This is the same as EVP_MD_CTX_new() in OpenSSL 3.0
if (ctx==NULL) return SI_EC_InitializationFailed;
const EVP_MD *md_type = NULL;
switch (macType_)
{
case EMT_SHA1:
md_type = EVP_sha1();
break;
case EMT_RIPEMD160:
md_type = EVP_ripemd160();
break;
case EMT_MD5:
md_type = EVP_md5();
break;
case EMT_SHA256:
md_type = EVP_sha256();
break;
case EMT_SHA384:
md_type = EVP_sha384();
break;
case EMT_SHA512:
md_type = EVP_sha512();
break;
}
if (md_type==NULL) return SI_EC_InitializationFailed;
if (EVP_DigestInit_ex(ctx, md_type, NULL) <= 0)
{
DCMSIGN_DEBUG("SiMDMAC::initialize(): call to EVP_DigestInit_ex() failed");
EVP_MD_CTX_destroy(ctx); // This is the same as EVP_MD_CTX_free() in OpenSSL 3.0
ctx = NULL;
return SI_EC_OpenSSLFailure;
}
return EC_Normal;
}
OFCondition SiMDMAC::digest(const unsigned char *data, unsigned long length)
{
if (length == 0) return EC_Normal;
if (ctx==NULL) return SI_EC_InitializationFailed;
if (data == NULL) return EC_IllegalCall;
if (EVP_DigestUpdate(ctx, data, length) <= 0)
{
DCMSIGN_DEBUG("SiMDMAC::digest(): call to EVP_DigestUpdate() failed");
return SI_EC_OpenSSLFailure;
}
return EC_Normal;
}
OFCondition SiMDMAC::finalize(unsigned char *result)
{
if (ctx==NULL) return SI_EC_InitializationFailed;
if (result==NULL) return EC_IllegalCall;
if (EVP_DigestFinal_ex(ctx, result, NULL) <= 0)
{
DCMSIGN_DEBUG("SiMDMAC::finalize(): call to EVP_DigestFinal_ex() failed");
return SI_EC_OpenSSLFailure;
}
return EC_Normal;
}
E_MACType SiMDMAC::macType() const
{
return macType_;
}
const char *SiMDMAC::getDefinedTerm() const
{
switch (macType_)
{
case EMT_SHA1:
return SI_DEFTERMS_SHA1;
break;
case EMT_RIPEMD160:
return SI_DEFTERMS_RIPEMD160;
break;
case EMT_MD5:
return SI_DEFTERMS_MD5;
break;
case EMT_SHA256:
return SI_DEFTERMS_SHA256;
break;
case EMT_SHA384:
return SI_DEFTERMS_SHA384;
break;
case EMT_SHA512:
return SI_DEFTERMS_SHA512;
break;
}
return "UNKNOWN_MAC";
}
#else /* WITH_OPENSSL */
int simdmac_cc_dummy_to_keep_linker_from_moaning = 0;
#endif
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