mirror of
https://github.com/reactos/reactos.git
synced 2024-08-20 18:35:32 +00:00
360 lines
9.1 KiB
C
360 lines
9.1 KiB
C
/*
|
|
* PROJECT: ReactOS Drivers
|
|
* COPYRIGHT: See COPYING in the top level directory
|
|
* PURPOSE: Kernel Security Support Provider Interface Driver
|
|
*
|
|
* PROGRAMMERS: Timo Kreuzer (timo.kreuzer@reactos.org)
|
|
*/
|
|
|
|
/* INCLUDES *******************************************************************/
|
|
|
|
#include "ksecdd.h"
|
|
|
|
MD5_CTX KsecLoadTimeStartMd5s[2];
|
|
DES3_KEY KsecGlobalDes3Key;
|
|
AES_KEY KsecGlobalAesKey;
|
|
|
|
typedef struct _KSEC_PROCESS_DATA
|
|
{
|
|
PEPROCESS Process;
|
|
HANDLE ProcessId;
|
|
LONGLONG CreateTime;
|
|
ULONG_PTR DirectoryTableBase;
|
|
} KSEC_PROCESS_DATA, *PKSEC_PROCESS_DATA;
|
|
|
|
typedef struct _KSEC_LOGON_DATA
|
|
{
|
|
LUID LogonId;
|
|
} KSEC_LOGON_DATA, *PKSEC_LOGON_DATA;
|
|
|
|
#if 0
|
|
void PrintKeyData(PUCHAR KeyData)
|
|
{
|
|
ULONG i;
|
|
for (i = 0; i < 32; i++)
|
|
{
|
|
DbgPrint("%02X", KeyData[i]);
|
|
}
|
|
DbgPrint("\n");
|
|
}
|
|
#endif
|
|
|
|
VOID
|
|
NTAPI
|
|
KsecInitializeEncryptionSupport (
|
|
VOID)
|
|
{
|
|
KSEC_ENTROPY_DATA EntropyData;
|
|
MD5_CTX Md5Context;
|
|
UCHAR KeyDataBuffer[32];
|
|
|
|
KsecGatherEntropyData(&EntropyData);
|
|
MD5Init(&Md5Context);
|
|
MD5Update(&Md5Context, (PVOID)&EntropyData, sizeof(EntropyData));
|
|
KsecLoadTimeStartMd5s[0] = Md5Context;
|
|
MD5Final(&Md5Context);
|
|
RtlCopyMemory(KeyDataBuffer, &Md5Context.digest, 16);
|
|
|
|
KsecGatherEntropyData(&EntropyData);
|
|
Md5Context = KsecLoadTimeStartMd5s[0];
|
|
MD5Update(&Md5Context, (PVOID)&EntropyData, sizeof(EntropyData));
|
|
KsecLoadTimeStartMd5s[1] = Md5Context;
|
|
MD5Final(&Md5Context);
|
|
RtlCopyMemory(&KeyDataBuffer[16], &Md5Context.digest, 16);
|
|
|
|
/* Create the global keys */
|
|
aes_setup(KeyDataBuffer, 32, 0, &KsecGlobalAesKey);
|
|
des3_setup(KeyDataBuffer, 24, 0, &KsecGlobalDes3Key);
|
|
|
|
/* Erase the temp data */
|
|
RtlSecureZeroMemory(KeyDataBuffer, sizeof(KeyDataBuffer));
|
|
RtlSecureZeroMemory(&Md5Context, sizeof(Md5Context));
|
|
}
|
|
|
|
static
|
|
VOID
|
|
KsecGetKeyData (
|
|
_Out_ UCHAR KeyData[32],
|
|
_In_ ULONG OptionFlags)
|
|
{
|
|
MD5_CTX Md5Contexts[2];
|
|
KSEC_PROCESS_DATA ProcessData;
|
|
KSEC_LOGON_DATA LogonData;
|
|
PEPROCESS CurrentProcess;
|
|
PACCESS_TOKEN Token;
|
|
|
|
/* We need to generate the key, start with our load MD5s */
|
|
Md5Contexts[0] = KsecLoadTimeStartMd5s[0];
|
|
Md5Contexts[1] = KsecLoadTimeStartMd5s[1];
|
|
|
|
/* Get the current process */
|
|
CurrentProcess = PsGetCurrentProcess();
|
|
|
|
if (OptionFlags == RTL_ENCRYPT_OPTION_SAME_PROCESS)
|
|
{
|
|
/* Hash some process specific data to generate the key */
|
|
RtlZeroMemory(&ProcessData, sizeof(ProcessData));
|
|
ProcessData.Process = CurrentProcess;
|
|
ProcessData.ProcessId = CurrentProcess->UniqueProcessId;
|
|
ProcessData.CreateTime = PsGetProcessCreateTimeQuadPart(CurrentProcess);
|
|
ProcessData.DirectoryTableBase = CurrentProcess->Pcb.DirectoryTableBase[0];
|
|
MD5Update(&Md5Contexts[0], (PVOID)&ProcessData, sizeof(ProcessData));
|
|
MD5Update(&Md5Contexts[1], (PVOID)&ProcessData, sizeof(ProcessData));
|
|
}
|
|
else if (OptionFlags == RTL_ENCRYPT_OPTION_SAME_LOGON)
|
|
{
|
|
/* Hash the logon id to generate the key */
|
|
RtlZeroMemory(&LogonData, sizeof(LogonData));
|
|
Token = PsReferencePrimaryToken(CurrentProcess);
|
|
SeQueryAuthenticationIdToken(Token, &LogonData.LogonId);
|
|
PsDereferencePrimaryToken(Token);
|
|
MD5Update(&Md5Contexts[0], (PVOID)&LogonData, sizeof(LogonData));
|
|
MD5Update(&Md5Contexts[1], (PVOID)&LogonData, sizeof(LogonData));
|
|
}
|
|
else if (OptionFlags == RTL_ENCRYPT_OPTION_CROSS_PROCESS)
|
|
{
|
|
/* Use the original MD5s to generate the global key */
|
|
NOTHING;
|
|
}
|
|
else
|
|
{
|
|
/* Must not pass anything else */
|
|
ASSERT(FALSE);
|
|
}
|
|
|
|
/* Finalize the MD5s */
|
|
MD5Final(&Md5Contexts[0]);
|
|
MD5Final(&Md5Contexts[1]);
|
|
|
|
/* Copy the md5 data */
|
|
RtlCopyMemory(KeyData, &Md5Contexts[0].digest, 16);
|
|
RtlCopyMemory((PUCHAR)KeyData + 16, &Md5Contexts[1].digest, 16);
|
|
|
|
/* Erase the temp data */
|
|
RtlSecureZeroMemory(&Md5Contexts, sizeof(Md5Contexts));
|
|
}
|
|
|
|
static
|
|
VOID
|
|
KsecGetDes3Key (
|
|
_Out_ PDES3_KEY Des3Key,
|
|
_In_ ULONG OptionFlags)
|
|
{
|
|
UCHAR KeyDataBuffer[32];
|
|
|
|
/* Check if the caller allows cross process encryption */
|
|
if (OptionFlags == RTL_ENCRYPT_OPTION_CROSS_PROCESS)
|
|
{
|
|
/* Return our global cached DES3 key */
|
|
*Des3Key = KsecGlobalDes3Key;
|
|
}
|
|
else
|
|
{
|
|
/* Setup the key */
|
|
KsecGetKeyData(KeyDataBuffer, OptionFlags);
|
|
des3_setup(KeyDataBuffer, 24, 0, Des3Key);
|
|
|
|
/* Erase the temp data */
|
|
RtlSecureZeroMemory(KeyDataBuffer, sizeof(KeyDataBuffer));
|
|
}
|
|
}
|
|
|
|
static
|
|
VOID
|
|
KsecGetAesKey (
|
|
_Out_ PAES_KEY AesKey,
|
|
_In_ ULONG OptionFlags)
|
|
{
|
|
UCHAR KeyDataBuffer[32];
|
|
|
|
/* Check if the caller allows cross process encryption */
|
|
if (OptionFlags == RTL_ENCRYPT_OPTION_CROSS_PROCESS)
|
|
{
|
|
/* Return our global cached AES key */
|
|
*AesKey = KsecGlobalAesKey;
|
|
}
|
|
else
|
|
{
|
|
/* Setup the key */
|
|
KsecGetKeyData(KeyDataBuffer, OptionFlags);
|
|
aes_setup(KeyDataBuffer, 32, 0, AesKey);
|
|
|
|
/* Erase the temp data */
|
|
RtlSecureZeroMemory(KeyDataBuffer, sizeof(KeyDataBuffer));
|
|
}
|
|
}
|
|
|
|
static
|
|
VOID
|
|
KsecEncryptMemoryDes3 (
|
|
_Inout_ PVOID Buffer,
|
|
_In_ ULONG Length,
|
|
_In_ ULONG OptionFlags)
|
|
{
|
|
UCHAR EncryptedBlockData[8];
|
|
DES3_KEY Des3Key;
|
|
|
|
/* Get they triple DES key */
|
|
KsecGetDes3Key(&Des3Key, OptionFlags);
|
|
|
|
/* Do the triple DES encryption */
|
|
while (Length >= sizeof(EncryptedBlockData))
|
|
{
|
|
des3_ecb_encrypt(Buffer, EncryptedBlockData, &Des3Key);
|
|
RtlCopyMemory(Buffer, EncryptedBlockData, sizeof(EncryptedBlockData));
|
|
Buffer = (PUCHAR)Buffer + sizeof(EncryptedBlockData);
|
|
Length -= sizeof(EncryptedBlockData);
|
|
}
|
|
|
|
/* Erase the key data */
|
|
RtlSecureZeroMemory(&Des3Key, sizeof(Des3Key));
|
|
}
|
|
|
|
static
|
|
VOID
|
|
KsecDecryptMemoryDes3 (
|
|
_Inout_ PVOID Buffer,
|
|
_In_ ULONG Length,
|
|
_In_ ULONG OptionFlags)
|
|
{
|
|
UCHAR BlockData[8];
|
|
DES3_KEY Des3Key;
|
|
|
|
/* Get they triple DES key */
|
|
KsecGetDes3Key(&Des3Key, OptionFlags);
|
|
|
|
/* Do the triple DES decryption */
|
|
while (Length >= sizeof(BlockData))
|
|
{
|
|
des3_ecb_decrypt(Buffer, BlockData, &Des3Key);
|
|
RtlCopyMemory(Buffer, BlockData, sizeof(BlockData));
|
|
Buffer = (PUCHAR)Buffer + sizeof(BlockData);
|
|
Length -= sizeof(BlockData);
|
|
}
|
|
|
|
/* Erase the key data */
|
|
RtlSecureZeroMemory(&Des3Key, sizeof(Des3Key));
|
|
}
|
|
|
|
static
|
|
VOID
|
|
KsecEncryptMemoryAes (
|
|
_Inout_ PVOID Buffer,
|
|
_In_ ULONG Length,
|
|
_In_ ULONG OptionFlags)
|
|
{
|
|
UCHAR EncryptedBlockData[16];
|
|
AES_KEY AesKey;
|
|
|
|
/* Get they AES key */
|
|
KsecGetAesKey(&AesKey, OptionFlags);
|
|
|
|
/* Do the AES encryption */
|
|
while (Length >= sizeof(EncryptedBlockData))
|
|
{
|
|
aes_ecb_encrypt(Buffer, EncryptedBlockData, &AesKey);
|
|
RtlCopyMemory(Buffer, EncryptedBlockData, sizeof(EncryptedBlockData));
|
|
Buffer = (PUCHAR)Buffer + sizeof(EncryptedBlockData);
|
|
Length -= sizeof(EncryptedBlockData);
|
|
}
|
|
|
|
/* Erase the key data */
|
|
RtlSecureZeroMemory(&AesKey, sizeof(AesKey));
|
|
}
|
|
|
|
static
|
|
VOID
|
|
KsecDecryptMemoryAes (
|
|
_Inout_ PVOID Buffer,
|
|
_In_ ULONG Length,
|
|
_In_ ULONG OptionFlags)
|
|
{
|
|
UCHAR BlockData[16];
|
|
AES_KEY AesKey;
|
|
|
|
/* Get they AES key */
|
|
KsecGetAesKey(&AesKey, OptionFlags);
|
|
|
|
/* Do the AES decryption */
|
|
while (Length >= sizeof(BlockData))
|
|
{
|
|
aes_ecb_decrypt(Buffer, BlockData, &AesKey);
|
|
RtlCopyMemory(Buffer, BlockData, sizeof(BlockData));
|
|
Buffer = (PUCHAR)Buffer + sizeof(BlockData);
|
|
Length -= sizeof(BlockData);
|
|
}
|
|
|
|
/* Erase the key data */
|
|
RtlSecureZeroMemory(&AesKey, sizeof(AesKey));
|
|
}
|
|
|
|
NTSTATUS
|
|
NTAPI
|
|
KsecEncryptMemory (
|
|
_Inout_ PVOID Buffer,
|
|
_In_ ULONG Length,
|
|
_In_ ULONG OptionFlags)
|
|
{
|
|
/* Validate parameter */
|
|
if (OptionFlags > RTL_ENCRYPT_OPTION_SAME_LOGON)
|
|
{
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
/* Check if the length is not 16 bytes aligned */
|
|
if (Length & 15)
|
|
{
|
|
/* Is it at least 8 bytes aligned? */
|
|
if (Length & 7)
|
|
{
|
|
/* No, we can't deal with it! */
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
/* Use triple DES encryption */
|
|
KsecEncryptMemoryDes3(Buffer, Length, OptionFlags);
|
|
}
|
|
else
|
|
{
|
|
/* Use AES encryption */
|
|
KsecEncryptMemoryAes(Buffer, Length, OptionFlags);
|
|
}
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
NTSTATUS
|
|
NTAPI
|
|
KsecDecryptMemory (
|
|
_Inout_ PVOID Buffer,
|
|
_In_ ULONG Length,
|
|
_In_ ULONG OptionFlags)
|
|
{
|
|
/* Validate parameter */
|
|
if (OptionFlags > RTL_ENCRYPT_OPTION_SAME_LOGON)
|
|
{
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
/* Check if the length is not 16 bytes aligned */
|
|
if (Length & 15)
|
|
{
|
|
/* Is it at least 8 bytes aligned? */
|
|
if (Length & 7)
|
|
{
|
|
/* No, we can't deal with it! */
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
/* Use triple DES encryption */
|
|
KsecDecryptMemoryDes3(Buffer, Length, OptionFlags);
|
|
}
|
|
else
|
|
{
|
|
/* Use AES encryption */
|
|
KsecDecryptMemoryAes(Buffer, Length, OptionFlags);
|
|
}
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|