add generic digest class
Change-Id: Ic5d2d8fbb0bb4edc4c966e185be81f6ca673950e
Reviewed-on: https://gerrit.libreoffice.org/36790
Reviewed-by: Markus Mohrhard <markus.mohrhard@googlemail.com>
Tested-by: Markus Mohrhard <markus.mohrhard@googlemail.com>
diff --git a/comphelper/Library_comphelper.mk b/comphelper/Library_comphelper.mk
index 0cdd3f9..03c8a61 100644
--- a/comphelper/Library_comphelper.mk
+++ b/comphelper/Library_comphelper.mk
@@ -43,6 +43,20 @@ $(eval $(call gb_Library_use_externals,comphelper,\
zlib \
))
ifeq ($(TLS),NSS)
$(eval $(call gb_Library_use_externals,comphelper,\
plc4 \
nss3 \
))
else
ifeq ($(TLS),OPENSSL)
$(eval $(call gb_Library_use_externals,comphelper,\
openssl \
openssl_headers \
))
endif
endif
$(eval $(call gb_Library_use_libraries,comphelper,\
cppu \
cppuhelper \
@@ -91,6 +105,7 @@ $(eval $(call gb_Library_add_exception_objects,comphelper,\
comphelper/source/misc/evtmethodhelper \
comphelper/source/misc/fileurl \
comphelper/source/misc/getexpandeduri \
comphelper/source/misc/hash \
comphelper/source/misc/instancelocker \
comphelper/source/misc/interaction \
comphelper/source/misc/listenernotification \
diff --git a/comphelper/source/misc/hash.cxx b/comphelper/source/misc/hash.cxx
new file mode 100644
index 0000000..94607f4
--- /dev/null
+++ b/comphelper/source/misc/hash.cxx
@@ -0,0 +1,144 @@
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
#include <comphelper/hash.hxx>
#include <config_oox.h>
#if USE_TLS_NSS
#include <nss.h>
#include <pk11pub.h>
#include <sechash.h>
#elif USE_TLS_OPENSSL
#include <openssl/evp.h>
#include <openssl/sha.h>
#endif // USE_TLS_OPENSSL
namespace comphelper {
struct HashImpl
{
#if USE_TLS_NSS
HASHContext* mpContext;
HASH_HashType getNSSType() const
{
switch (meType)
{
case HashType::SHA1:
return HASH_AlgSHA1;
case HashType::SHA256:
return HASH_AlgSHA256;
case HashType::SHA512:
return HASH_AlgSHA512;
}
return HASH_AlgNULL;
}
#elif USE_TLS_OPENSSL
EVP_MD_CTX* mpContext;
EVP_MD* getOpenSSLType() const
{
switch (meType)
{
case HashType::SHA1:
return EVP_sha1();
case HashType::SHA256:
return EVP_sha256();
case HashType::SHA512:
return EVP_sha512();
}
return nullptr;
}
#endif
HashType meType;
HashImpl(HashType eType):
meType(eType)
{
#if USE_TLS_NSS
NSS_NoDB_Init(nullptr);
mpContext = HASH_Create(getNSSType());
HASH_Begin(mpContext);
#elif USE_TLS_OPENSSL
mpContext = EVP_MD_CTX_create();
EVP_DigestInit_ex(mpContext, getOpenSSLType(), NULL);
#endif
}
~HashImpl()
{
#if USE_TLS_NSS
HASH_Destroy(mpContext);
#elif USE_TLS_OPENSSL
EVP_MD_CTX_destroy(mpContext);
#endif
}
};
Hash::Hash(HashType eType):
mpImpl(new HashImpl(eType))
{
}
Hash::~Hash()
{
}
void Hash::update(const unsigned char* pInput, size_t length)
{
#if USE_TLS_NSS
HASH_Update(mpImpl->mpContext, pInput, length);
#elif USE_TLS_OPENSSL
EVP_DigestUpdate(mpImpl->mpContext, pInput, length);
#endif
}
std::vector<unsigned char> Hash::finalize()
{
std::vector<unsigned char> hash(getLength(), 0);
unsigned int digestWrittenLength;
#if USE_TLS_NSS
HASH_End(mpImpl->mpContext, hash.data(), &digestWrittenLength, getLength());
#elif USE_TLS_OPENSSL
EVP_DigestFinal_ex(mpImpl->mpContext, hash.data(), &digestWrittenLength);
#endif
return hash;
}
size_t Hash::getLength() const
{
switch (mpImpl->meType)
{
case HashType::SHA1:
return 20;
case HashType::SHA256:
return 32;
case HashType::SHA512:
return 64;
}
return 0;
}
std::vector<unsigned char> Hash::calculateHash(const unsigned char* pInput, size_t length, HashType eType)
{
Hash aHash(eType);
aHash.update(pInput, length);
return aHash.finalize();
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/hash.hxx b/include/comphelper/hash.hxx
new file mode 100644
index 0000000..c14c6c74
--- /dev/null
+++ b/include/comphelper/hash.hxx
@@ -0,0 +1,47 @@
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
#include <comphelper/comphelperdllapi.h>
#include <memory>
#include <vector>
namespace comphelper {
enum class HashType
{
SHA1,
SHA256,
SHA512
};
struct HashImpl;
class COMPHELPER_DLLPUBLIC Hash
{
private:
std::unique_ptr<HashImpl> mpImpl;
public:
Hash(HashType eType);
~Hash();
void update(const unsigned char* pInput, size_t length);
std::vector<unsigned char> finalize();
static std::vector<unsigned char> calculateHash(const unsigned char* pInput, size_t length, HashType eType);
size_t getLength() const;
};
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
