Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 257 insertions, 0 deletions

diff --git a/comphelper/source/misc/hash.cxx b/comphelper/source/misc/hash.cxx
new file mode 100644
index 000000000..50fd8cd0f
--- /dev/null
+++ b/comphelper/source/misc/hash.cxx
@@ -0,0 +1,257 @@
+/* -*- 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 <sal/config.h>
+
+#include <com/sun/star/uno/RuntimeException.hpp>
+#include <comphelper/hash.hxx>
+#include <rtl/ustring.hxx>
+#include <rtl/alloc.h>
+#include <osl/endian.h>
+#include <config_oox.h>
+
+#if USE_TLS_NSS
+#include <nss.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::MD5:
+                return HASH_AlgMD5;
+            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;
+
+    const EVP_MD* getOpenSSLType() const
+    {
+        switch (meType)
+        {
+            case HashType::MD5:
+                return EVP_md5();
+            case HashType::SHA1:
+                return EVP_sha1();
+            case HashType::SHA256:
+                return EVP_sha256();
+            case HashType::SHA512:
+                return EVP_sha512();
+        }
+
+        return nullptr;
+    }
+#endif
+
+    HashType const meType;
+
+    HashImpl(HashType eType):
+        meType(eType)
+    {
+
+#if USE_TLS_NSS
+        auto const e = NSS_NoDB_Init(nullptr);
+        if (e != SECSuccess) {
+            throw css::uno::RuntimeException("NSS_NoDB_Init failed with " + OUString::number(e));
+        }
+        mpContext = HASH_Create(getNSSType());
+        HASH_Begin(mpContext);
+#elif USE_TLS_OPENSSL
+        mpContext = EVP_MD_CTX_create();
+        EVP_DigestInit_ex(mpContext, getOpenSSLType(), nullptr);
+#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);
+#else
+    (void)pInput;
+    (void)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);
+#else
+    (void)digestWrittenLength;
+#endif
+
+    return hash;
+}
+
+size_t Hash::getLength() const
+{
+    switch (mpImpl->meType)
+    {
+        case HashType::MD5:
+            return MD5_HASH_LENGTH;
+        case HashType::SHA1:
+            return SHA1_HASH_LENGTH;
+        case HashType::SHA256:
+            return SHA256_HASH_LENGTH;
+        case HashType::SHA512:
+            return SHA512_HASH_LENGTH;
+    }
+
+    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();
+}
+
+std::vector<unsigned char> Hash::calculateHash(
+        const unsigned char* pInput, size_t nLength,
+        const unsigned char* pSalt, size_t nSaltLen,
+        sal_uInt32 nSpinCount,
+        IterCount eIterCount,
+        HashType eType)
+{
+    if (!pSalt)
+        nSaltLen = 0;
+
+    if (!nSaltLen && !nSpinCount)
+        return calculateHash( pInput, nLength, eType);
+
+    Hash aHash(eType);
+    if (nSaltLen)
+    {
+        std::vector<unsigned char> initialData( nSaltLen + nLength);
+        std::copy( pSalt, pSalt + nSaltLen, initialData.begin());
+        std::copy( pInput, pInput + nLength, initialData.begin() + nSaltLen);
+        aHash.update( initialData.data(), initialData.size());
+        rtl_secureZeroMemory( initialData.data(), initialData.size());
+    }
+    else
+    {
+        aHash.update( pInput, nLength);
+    }
+    std::vector<unsigned char> hash( aHash.finalize());
+
+    if (nSpinCount)
+    {
+        // https://msdn.microsoft.com/en-us/library/dd920692
+        // says the iteration is concatenated after the hash.
+        // https://msdn.microsoft.com/en-us/library/dd924776 and
+        // https://msdn.microsoft.com/en-us/library/dd925430
+        // say the iteration is prepended to the hash.
+        const size_t nAddIter = (eIterCount == IterCount::NONE ? 0 : 4);
+        const size_t nIterPos = (eIterCount == IterCount::APPEND ? hash.size() : 0);
+        const size_t nHashPos = (eIterCount == IterCount::PREPEND ? nAddIter : 0);
+        std::vector<unsigned char> data( hash.size() + nAddIter, 0);
+        for (sal_uInt32 i = 0; i < nSpinCount; ++i)
+        {
+            std::copy( hash.begin(), hash.end(), data.begin() + nHashPos);
+            if (nAddIter)
+            {
+#ifdef OSL_BIGENDIAN
+                sal_uInt32 be = i;
+                sal_uInt8* p = reinterpret_cast<sal_uInt8*>(&be);
+                std::swap( p[0], p[3] );
+                std::swap( p[1], p[2] );
+                memcpy( data.data() + nIterPos, &be, nAddIter);
+#else
+                memcpy( data.data() + nIterPos, &i, nAddIter);
+#endif
+            }
+            /* TODO: isn't there something better than
+             * creating/finalizing/destroying on each iteration? */
+            Hash aReHash(eType);
+            aReHash.update( data.data(), data.size());
+            hash = aReHash.finalize();
+        }
+    }
+
+    return hash;
+}
+
+std::vector<unsigned char> Hash::calculateHash(
+        const OUString& rPassword,
+        const std::vector<unsigned char>& rSaltValue,
+        sal_uInt32 nSpinCount,
+        IterCount eIterCount,
+        HashType eType)
+{
+    const unsigned char* pPassBytes = reinterpret_cast<const unsigned char*>(rPassword.getStr());
+    const size_t nPassBytesLen = rPassword.getLength() * 2;
+#ifdef OSL_BIGENDIAN
+    // Swap UTF16-BE to UTF16-LE
+    std::vector<unsigned char> vPass;
+    if (nPassBytesLen)
+    {
+        vPass.resize( nPassBytesLen);
+        std::copy( pPassBytes, pPassBytes + nPassBytesLen, vPass.begin());
+        unsigned char* p = vPass.data();
+        unsigned char const * const pEnd = p + nPassBytesLen;
+        for ( ; p < pEnd; p += 2 )
+        {
+            std::swap( p[0], p[1] );
+        }
+        pPassBytes = vPass.data();
+    }
+#endif
+    return calculateHash( pPassBytes, nPassBytesLen, rSaltValue.data(), rSaltValue.size(), nSpinCount,
+            eIterCount, eType);
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */