/**
 * WinPR: Windows Portable Runtime
 * Cryptography API (CryptoAPI)
 *
 * Copyright 2012-2013 Marc-Andre Moreau <marcandre.moreau@gmail.com>
 *
 * 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
 *
 * 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.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <winpr/crypto.h>

/**
 * CryptAcquireCertificatePrivateKey
 * CryptBinaryToStringA
 * CryptBinaryToStringW
 * CryptCloseAsyncHandle
 * CryptCreateAsyncHandle
 * CryptCreateKeyIdentifierFromCSP
 * CryptDecodeMessage
 * CryptDecodeObject
 * CryptDecodeObjectEx
 * CryptDecryptAndVerifyMessageSignature
 * CryptDecryptMessage
 * CryptEncodeObject
 * CryptEncodeObjectEx
 * CryptEncryptMessage
 * CryptEnumKeyIdentifierProperties
 * CryptEnumOIDFunction
 * CryptEnumOIDInfo
 * CryptExportPKCS8
 * CryptExportPublicKeyInfo
 * CryptExportPublicKeyInfoEx
 * CryptExportPublicKeyInfoFromBCryptKeyHandle
 * CryptFindCertificateKeyProvInfo
 * CryptFindLocalizedName
 * CryptFindOIDInfo
 * CryptFormatObject
 * CryptFreeOIDFunctionAddress
 * CryptGetAsyncParam
 * CryptGetDefaultOIDDllList
 * CryptGetDefaultOIDFunctionAddress
 * CryptGetKeyIdentifierProperty
 * CryptGetMessageCertificates
 * CryptGetMessageSignerCount
 * CryptGetOIDFunctionAddress
 * CryptGetOIDFunctionValue
 * CryptHashCertificate
 * CryptHashCertificate2
 * CryptHashMessage
 * CryptHashPublicKeyInfo
 * CryptHashToBeSigned
 * CryptImportPKCS8
 * CryptImportPublicKeyInfo
 * CryptImportPublicKeyInfoEx
 * CryptImportPublicKeyInfoEx2
 * CryptInitOIDFunctionSet
 * CryptInstallDefaultContext
 * CryptInstallOIDFunctionAddress
 * CryptLoadSip
 * CryptMemAlloc
 * CryptMemFree
 * CryptMemRealloc
 * CryptMsgCalculateEncodedLength
 * CryptMsgClose
 * CryptMsgControl
 * CryptMsgCountersign
 * CryptMsgCountersignEncoded
 * CryptMsgDuplicate
 * CryptMsgEncodeAndSignCTL
 * CryptMsgGetAndVerifySigner
 * CryptMsgGetParam
 * CryptMsgOpenToDecode
 * CryptMsgOpenToEncode
 * CryptMsgSignCTL
 * CryptMsgUpdate
 * CryptMsgVerifyCountersignatureEncoded
 * CryptMsgVerifyCountersignatureEncodedEx
 * CryptQueryObject
 * CryptRegisterDefaultOIDFunction
 * CryptRegisterOIDFunction
 * CryptRegisterOIDInfo
 * CryptRetrieveTimeStamp
 * CryptSetAsyncParam
 * CryptSetKeyIdentifierProperty
 * CryptSetOIDFunctionValue
 * CryptSignAndEncodeCertificate
 * CryptSignAndEncryptMessage
 * CryptSignCertificate
 * CryptSignMessage
 * CryptSignMessageWithKey
 * CryptSIPAddProvider
 * CryptSIPCreateIndirectData
 * CryptSIPGetCaps
 * CryptSIPGetSignedDataMsg
 * CryptSIPLoad
 * CryptSIPPutSignedDataMsg
 * CryptSIPRemoveProvider
 * CryptSIPRemoveSignedDataMsg
 * CryptSIPRetrieveSubjectGuid
 * CryptSIPRetrieveSubjectGuidForCatalogFile
 * CryptSIPVerifyIndirectData
 * CryptUninstallDefaultContext
 * CryptUnregisterDefaultOIDFunction
 * CryptUnregisterOIDFunction
 * CryptUnregisterOIDInfo
 * CryptUpdateProtectedState
 * CryptVerifyCertificateSignature
 * CryptVerifyCertificateSignatureEx
 * CryptVerifyDetachedMessageHash
 * CryptVerifyDetachedMessageSignature
 * CryptVerifyMessageHash
 * CryptVerifyMessageSignature
 * CryptVerifyMessageSignatureWithKey
 * CryptVerifyTimeStampSignature
 * DbgInitOSS
 * DbgPrintf
 * PFXExportCertStore
 * PFXExportCertStore2
 * PFXExportCertStoreEx
 * PFXImportCertStore
 * PFXIsPFXBlob
 * PFXVerifyPassword
 */

#ifndef _WIN32

#include "crypto.h"

#include <winpr/crt.h>
#include <winpr/collections.h>

static wListDictionary* g_ProtectedMemoryBlocks = NULL;

BOOL CryptProtectMemory(LPVOID pData, DWORD cbData, DWORD dwFlags)
{
	BYTE* pCipherText;
	int cbOut, cbFinal;
	BYTE randomKey[256];
	WINPR_PROTECTED_MEMORY_BLOCK* pMemBlock;

	if (dwFlags != CRYPTPROTECTMEMORY_SAME_PROCESS)
		return FALSE;

	if (!g_ProtectedMemoryBlocks)
	{
		g_ProtectedMemoryBlocks = ListDictionary_New(TRUE);
		if (!g_ProtectedMemoryBlocks)
			return FALSE;
	}

	pMemBlock = (WINPR_PROTECTED_MEMORY_BLOCK*) calloc(1, sizeof(WINPR_PROTECTED_MEMORY_BLOCK));
	if (!pMemBlock)
		return FALSE;

	pMemBlock->pData = pData;
	pMemBlock->cbData = cbData;
	pMemBlock->dwFlags = dwFlags;

	/* AES Initialization */

	RAND_bytes(pMemBlock->salt, 8);
	RAND_bytes(randomKey, sizeof(randomKey));

	EVP_BytesToKey(EVP_aes_256_cbc(), EVP_sha1(),
			pMemBlock->salt,
			randomKey, sizeof(randomKey),
			4, pMemBlock->key, pMemBlock->iv);

	SecureZeroMemory(randomKey, sizeof(randomKey));

	EVP_CIPHER_CTX_init(&(pMemBlock->enc));
	EVP_EncryptInit_ex(&(pMemBlock->enc), EVP_aes_256_cbc(), NULL, pMemBlock->key, pMemBlock->iv);

	EVP_CIPHER_CTX_init(&(pMemBlock->dec));
	EVP_DecryptInit_ex(&(pMemBlock->dec), EVP_aes_256_cbc(), NULL, pMemBlock->key, pMemBlock->iv);

	/* AES Encryption */

	cbOut = pMemBlock->cbData + AES_BLOCK_SIZE - 1;
	pCipherText = (BYTE*) malloc(cbOut);
	if (!pCipherText)
	{
		free(pMemBlock);
		return FALSE;
	}

	EVP_EncryptInit_ex(&(pMemBlock->enc), NULL, NULL, NULL, NULL);
	EVP_EncryptUpdate(&(pMemBlock->enc), pCipherText, &cbOut, pMemBlock->pData, pMemBlock->cbData);
	EVP_EncryptFinal_ex(&(pMemBlock->enc), pCipherText + cbOut, &cbFinal);

	CopyMemory(pMemBlock->pData, pCipherText, pMemBlock->cbData);
	free(pCipherText);

	return ListDictionary_Add(g_ProtectedMemoryBlocks, pData, pMemBlock);
}

BOOL CryptUnprotectMemory(LPVOID pData, DWORD cbData, DWORD dwFlags)
{
	BYTE* pPlainText;
	int cbOut, cbFinal;
	WINPR_PROTECTED_MEMORY_BLOCK* pMemBlock;

	if (dwFlags != CRYPTPROTECTMEMORY_SAME_PROCESS)
		return FALSE;

	if (!g_ProtectedMemoryBlocks)
		return FALSE;

	pMemBlock = (WINPR_PROTECTED_MEMORY_BLOCK*) ListDictionary_GetItemValue(g_ProtectedMemoryBlocks, pData);

	if (!pMemBlock)
		return FALSE;

	/* AES Decryption */

	cbOut = pMemBlock->cbData + AES_BLOCK_SIZE - 1;
	pPlainText = (BYTE*) malloc(cbOut);
	if (!pPlainText)
		return FALSE;

	EVP_DecryptInit_ex(&(pMemBlock->dec), NULL, NULL, NULL, NULL);
	EVP_DecryptUpdate(&(pMemBlock->dec), pPlainText, &cbOut, pMemBlock->pData, pMemBlock->cbData);
	EVP_DecryptFinal_ex(&(pMemBlock->dec), pPlainText + cbOut, &cbFinal);

	CopyMemory(pMemBlock->pData, pPlainText, pMemBlock->cbData);
	SecureZeroMemory(pPlainText, pMemBlock->cbData);
	free(pPlainText);

	ListDictionary_Remove(g_ProtectedMemoryBlocks, pData);

	/* AES Cleanup */

	EVP_CIPHER_CTX_cleanup(&(pMemBlock->enc));
	EVP_CIPHER_CTX_cleanup(&(pMemBlock->dec));

	free(pMemBlock);

	return TRUE;
}

BOOL CryptProtectData(DATA_BLOB* pDataIn, LPCWSTR szDataDescr, DATA_BLOB* pOptionalEntropy,
		PVOID pvReserved, CRYPTPROTECT_PROMPTSTRUCT* pPromptStruct, DWORD dwFlags, DATA_BLOB* pDataOut)
{
	return TRUE;
}

BOOL CryptUnprotectData(DATA_BLOB* pDataIn, LPWSTR* ppszDataDescr, DATA_BLOB* pOptionalEntropy,
		PVOID pvReserved, CRYPTPROTECT_PROMPTSTRUCT* pPromptStruct, DWORD dwFlags, DATA_BLOB* pDataOut)
{
	return TRUE;
}

BOOL CryptStringToBinaryW(LPCWSTR pszString, DWORD cchString, DWORD dwFlags, BYTE* pbBinary,
		DWORD* pcbBinary, DWORD* pdwSkip, DWORD* pdwFlags)
{
	return TRUE;
}

BOOL CryptStringToBinaryA(LPCSTR pszString, DWORD cchString, DWORD dwFlags, BYTE* pbBinary,
		DWORD* pcbBinary, DWORD* pdwSkip, DWORD* pdwFlags)
{
	return TRUE;
}

BOOL CryptBinaryToStringW(CONST BYTE* pbBinary, DWORD cbBinary, DWORD dwFlags, LPWSTR pszString, DWORD* pcchString)
{
	return TRUE;
}

BOOL CryptBinaryToStringA(CONST BYTE* pbBinary, DWORD cbBinary, DWORD dwFlags, LPSTR pszString, DWORD* pcchString)
{
	return TRUE;
}

#endif