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MD6.pas
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MD6.pas
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{-------------------------------------------------------------------------------
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/.
-------------------------------------------------------------------------------}
{===============================================================================
MD6 calculation
Provides classes and functions for calculation of MD6 hash. All hash widths
that are a multiple of 8 are supported (meaning only whole bytes, arbitrary
bitstreams are not supported). Also, all mandatory and optional hash inputs
can be varied (key, mode control, number of rounds).
Default implementation provided here (class TMD6Hash and its descendants)
is only single-threaded, but as the MD6 can be heavily parallelized, an
attemp was made to provide MD6 hashing that can use multiple execution
paths.
This is done in the form of TMD6HashParallel class (note that this class
is NOT a descendant of THashBase, but rather a standalone class).
The used code is purely experimental and probably bugged, but it offers a
full freedom in hash input values (there is a limiting factor that
protects against excessive memory use for combination of long messages
and low mode control - property MaxSequentialNodes - but it can be
changed as needed).
The only strict limit is, that the entire message must be available at
the start of processing, so only hashing of memory buffer or file is
provided.
WARNING - The parallel code is not fully tested, use it at your own
risk. Also, performance gain and scaling is uncertain, as
I was not able to test the code on more than dual-core CPU.
Version 1.1 (2023-01-13)
Last change 2024-02-03
©2022-2024 František Milt
Contacts:
František Milt: [email protected]
Support:
If you find this code useful, please consider supporting its author(s) by
making a small donation using the following link(s):
https://www.paypal.me/FMilt
Changelog:
For detailed changelog and history please refer to this git repository:
github.com/TheLazyTomcat/Lib.MD6
Dependencies:
AuxClasses - github.com/TheLazyTomcat/Lib.AuxClasses
AuxTypes - github.com/TheLazyTomcat/Lib.AuxTypes
BasicUIM - github.com/TheLazyTomcat/Lib.BasicUIM
BitOps - github.com/TheLazyTomcat/Lib.BitOps
* BinaryStreamingLite - github.com/TheLazyTomcat/Lib.BinaryStreamingLite
* BitVector - github.com/TheLazyTomcat/Lib.BitVector
CrossSyncObjs - github.com/TheLazyTomcat/Lib.CrossSyncObjs
HashBase - github.com/TheLazyTomcat/Lib.HashBase
InterlockedOps - github.com/TheLazyTomcat/Lib.InterlockedOps
* LinSyncObjs - github.com/TheLazyTomcat/Lib.LinSyncObjs
NamedSharedItems - github.com/TheLazyTomcat/Lib.NamedSharedItems
SHA1 - github.com/TheLazyTomcat/Lib.SHA1
* SimpleCPUID - github.com/TheLazyTomcat/Lib.SimpleCPUID
* SimpleFutex - github.com/TheLazyTomcat/Lib.SimpleFutex
SharedMemoryStream - github.com/TheLazyTomcat/Lib.SharedMemoryStream
StaticMemoryStream - github.com/TheLazyTomcat/Lib.StaticMemoryStream
StrRect - github.com/TheLazyTomcat/Lib.StrRect
* UInt64Utils - github.com/TheLazyTomcat/Lib.UInt64Utils
* WinSyncObjs - github.com/TheLazyTomcat/Lib.WinSyncObjs
Libraries UInt64Utils and WinSyncObjs are required only when compiling for
Windows OS.
Libraries BitVector, LinSyncObjs and SimpleFutex are required only when
compiling for Linux OS.
Library SimpleCPUID might not be required, depending on defined symbols in
InterlockedOps and BitOps libraries.
BinaryStreamingLite can be replaced by full BinaryStreaming.
===============================================================================}
unit MD6;
{$IF defined(CPU64) or defined(CPU64BITS)}
{$DEFINE CPU64bit}
{$ELSEIF defined(CPU16)}
{$MESSAGE FATAL 'Unsupported CPU.'}
{$ELSE}
{$DEFINE CPU32bit}
{$IFEND}
{$IF Defined(WINDOWS) or Defined(MSWINDOWS)}
{$DEFINE Windows}
{$ELSEIF Defined(LINUX) and Defined(FPC)}
{$DEFINE Linux}
{$ELSE}
{$MESSAGE FATAL 'Unsupported operating system.'}
{$IFEND}
{$IFDEF FPC}
{$MODE ObjFPC}
{$MODESWITCH DuplicateLocals+}
{$MODESWITCH ClassicProcVars+}
{$DEFINE FPC_DisableWarns}
{$MACRO ON}
{$ENDIF}
{$H+}
interface
uses
SysUtils, Classes,
AuxTypes, AuxClasses, HashBase, CrossSyncObjs;
{===============================================================================
Library-specific exceptions
===============================================================================}
type
EMD6Exception = class(EHASHException);
EMD6InvalidValue = class(EMD6Exception);
EMD6InvalidState = class(EMD6Exception);
EMD6InvalidHashLength = class(EMD6Exception);
EMD6IncompatibleClass = class(EMD6Exception);
EMD6SizeMismatch = class(EMD6Exception);
EMD6ProcessingError = class(EMD6Exception);
EMD6OperationNotAllowed = class(EMD6Exception);
EMD6ParallelInternal = class(EMD6Exception);
{===============================================================================
Common types and constants
===============================================================================}
{
Bytes in all MD6 hashes are always ordered from the most significant byte to
the least significant byte (big endian).
MD6 does not differ in little and big endian form, as it is not a single
quantity, therefore methods like MD6ToLE or MD6ToBE do nothing and are
present only for the sake of completeness.
}
type
TMD6 = packed array of UInt8;
TMD6_224 = packed array[0..27] of UInt8; PMD6_224 = ^TMD6_224;
TMD6_256 = packed array[0..31] of UInt8; PMD6_256 = ^TMD6_256;
TMD6_384 = packed array[0..47] of UInt8; PMD6_384 = ^TMD6_384;
TMD6_512 = packed array[0..63] of UInt8; PMD6_512 = ^TMD6_512;
TMD6Key = packed array of UInt8;
//------------------------------------------------------------------------------
const
ZeroMD6_224: TMD6_224 = (0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0);
ZeroMD6_256: TMD6_256 = (0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0);
ZeroMD6_384: TMD6_384 = (0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0);
ZeroMD6_512: TMD6_512 = (0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0);
MD6_BITS_DEFAULT = 512;
{===============================================================================
--------------------------------------------------------------------------------
TMD6Hash
--------------------------------------------------------------------------------
===============================================================================}
type
TMD6Word = UInt64;
TMD6ProcessingBlock = array of TMD6Word;
TMD6ProcessingNode = record
Index: Int64;
Bytes: TMemSize; // number of bytes already stored in block
Block: TMD6ProcessingBlock;
end;
TMD6ProcessingState = record
Levels: array of TMD6ProcessingNode;
end;
{===============================================================================
TMD6Hash - class declaration
===============================================================================}
type
TMD6Hash = class(TBlockHash)
protected
fMD6: TMD6;
fHashBits: Integer; // whole bytes only (div 8)
fKey: TMD6Key; // max length 64
fRounds: Integer; // default is 40 + (fHashBits / 4)
fRoundsDef: Boolean; // indicates if rounds were set explicitly (false) or implicitly (true)
fModeControl: Integer; // >= 0 (explicitly limited to 255)
fState: TMD6ProcessingState;
fProcessing: Boolean;
// getters setters
Function GetMD6: TMD6; virtual;
procedure SetMD6(Value: TMD6); virtual; // not used as a setter in any property
procedure SetHashBits(Value: Integer); virtual;
Function GetKey: TMD6Key; virtual;
procedure PutKey(Value: TMD6Key); virtual;
procedure SetRoundsDefault; virtual;
procedure SetRounds(Value: Integer); virtual;
procedure SetModeControl(Value: Integer); virtual;
// main processing
procedure AddTreeLevel; virtual;
procedure ProcessTreeNode(Level: Integer; const Data); virtual;
procedure ProcessTreeNodeFinal(Level: Integer; PadBytes: TMemSize); virtual;
// block hash processing
procedure ProcessBlock(const Block); override;
procedure ProcessFirst(const Block); override;
procedure ProcessLast; override;
// init/final
procedure Initialize; override;
public
class Function MD6ToLE(MD6: TMD6): TMD6; virtual;
class Function MD6ToBE(MD6: TMD6): TMD6; virtual;
class Function MD6FromLE(MD6: TMD6): TMD6; virtual;
class Function MD6FromBE(MD6: TMD6): TMD6; virtual;
Function HashSize: TMemSize; reintroduce;
class Function HashName: String; override;
class Function HashEndianness: THashEndianness; override;
class Function HashFinalization: Boolean; override;
constructor CreateAndInitFrom(Hash: THashBase); overload; override;
constructor CreateAndInitFrom(Hash: TMD6); overload; virtual;
procedure Init; override;
Function Compare(Hash: THashBase): Integer; override;
Function AsString: String; override;
procedure FromString(const Str: String); override;
procedure FromStringDef(const Str: String; const Default: TMD6); reintroduce; overload; virtual;
procedure SaveToStream(Stream: TStream; Endianness: THashEndianness = heDefault); override;
procedure LoadFromStream(Stream: TStream; Endianness: THashEndianness = heDefault); override;
procedure SetKey(const Key; Size: TMemSize); overload; virtual;
{
The Key parameter is converted to UTF8 encoding and this new string is
then used for the actual key. If it is longer than 64 bytes, it is
truncated.
}
procedure SetKey(const Key: String); overload; virtual;
property MD6: TMD6 read GetMD6;
property HashBits: Integer read fHashBits write SetHashBits;
property Key: TMD6Key read GetKey write PutKey;
property Rounds: Integer read fRounds write SetRounds;
property ModeControl: Integer read fModeControl write SetModeControl;
end;
{===============================================================================
--------------------------------------------------------------------------------
TMD6DefHash
--------------------------------------------------------------------------------
===============================================================================}
{===============================================================================
TMD6DefHash - class declaration
===============================================================================}
type
TMD6DefHash = class(TMD6Hash)
protected
procedure SetMD6(Value: TMD6); override;
procedure SetHashBits(Value: Integer); override;
procedure PutKey(Value: TMD6Key); override;
procedure SetRounds(Value: Integer); override;
procedure SetModeControl(Value: Integer); override;
public
procedure SetKey(const Key; Size: TMemSize); overload; override;
procedure SetKey(const Key: String); overload; override;
// the properties are made read-only
property HashBits: Integer read fHashBits;
property Key: TMD6Key read GetKey;
property Rounds: Integer read fRounds;
property ModeControl: Integer read fModeControl;
end;
{===============================================================================
--------------------------------------------------------------------------------
TMD6_224Hash
--------------------------------------------------------------------------------
===============================================================================}
{===============================================================================
TMD6_224Hash - class declaration
===============================================================================}
type
TMD6_224Hash = class(TMD6DefHash)
protected
Function GetMD6_224: TMD6_224; virtual;
procedure Initialize; override;
public
class Function MD6_224ToLE(MD6: TMD6_224): TMD6_224; virtual;
class Function MD6_224ToBE(MD6: TMD6_224): TMD6_224; virtual;
class Function MD6_224FromLE(MD6: TMD6_224): TMD6_224; virtual;
class Function MD6_224FromBE(MD6: TMD6_224): TMD6_224; virtual;
class Function HashName: String; override;
constructor CreateAndInitFrom(Hash: THashBase); overload; override;
constructor CreateAndInitFrom(Hash: TMD6); overload; override;
constructor CreateAndInitFrom(Hash: TMD6_224); overload; virtual;
procedure FromStringDef(const Str: String; const Default: TMD6_224); overload; virtual;
property MD6_224: TMD6_224 read GetMD6_224;
end;
{===============================================================================
--------------------------------------------------------------------------------
TMD6_256Hash
--------------------------------------------------------------------------------
===============================================================================}
{===============================================================================
TMD6_256Hash - class declaration
===============================================================================}
type
TMD6_256Hash = class(TMD6DefHash)
protected
Function GetMD6_256: TMD6_256; virtual;
procedure Initialize; override;
public
class Function MD6_256ToLE(MD6: TMD6_256): TMD6_256; virtual;
class Function MD6_256ToBE(MD6: TMD6_256): TMD6_256; virtual;
class Function MD6_256FromLE(MD6: TMD6_256): TMD6_256; virtual;
class Function MD6_256FromBE(MD6: TMD6_256): TMD6_256; virtual;
class Function HashName: String; override;
constructor CreateAndInitFrom(Hash: THashBase); overload; override;
constructor CreateAndInitFrom(Hash: TMD6); overload; override;
constructor CreateAndInitFrom(Hash: TMD6_256); overload; virtual;
procedure FromStringDef(const Str: String; const Default: TMD6_256); overload; virtual;
property MD6_256: TMD6_256 read GetMD6_256;
end;
{===============================================================================
--------------------------------------------------------------------------------
TMD6_384Hash
--------------------------------------------------------------------------------
===============================================================================}
{===============================================================================
TMD6_384Hash - class declaration
===============================================================================}
type
TMD6_384Hash = class(TMD6DefHash)
protected
Function GetMD6_384: TMD6_384; virtual;
procedure Initialize; override;
public
class Function MD6_384ToLE(MD6: TMD6_384): TMD6_384; virtual;
class Function MD6_384ToBE(MD6: TMD6_384): TMD6_384; virtual;
class Function MD6_384FromLE(MD6: TMD6_384): TMD6_384; virtual;
class Function MD6_384FromBE(MD6: TMD6_384): TMD6_384; virtual;
class Function HashName: String; override;
constructor CreateAndInitFrom(Hash: THashBase); overload; override;
constructor CreateAndInitFrom(Hash: TMD6); overload; override;
constructor CreateAndInitFrom(Hash: TMD6_384); overload; virtual;
procedure FromStringDef(const Str: String; const Default: TMD6_384); overload; virtual;
property MD6_384: TMD6_384 read GetMD6_384;
end;
{===============================================================================
--------------------------------------------------------------------------------
TMD6_512Hash
--------------------------------------------------------------------------------
===============================================================================}
{===============================================================================
TMD6_512Hash - class declaration
===============================================================================}
type
TMD6_512Hash = class(TMD6DefHash)
protected
Function GetMD6_512: TMD6_512; virtual;
procedure Initialize; override;
public
class Function MD6_512ToLE(MD6: TMD6_512): TMD6_512; virtual;
class Function MD6_512ToBE(MD6: TMD6_512): TMD6_512; virtual;
class Function MD6_512FromLE(MD6: TMD6_512): TMD6_512; virtual;
class Function MD6_512FromBE(MD6: TMD6_512): TMD6_512; virtual;
class Function HashName: String; override;
constructor CreateAndInitFrom(Hash: THashBase); overload; override;
constructor CreateAndInitFrom(Hash: TMD6); overload; override;
constructor CreateAndInitFrom(Hash: TMD6_512); overload; virtual;
procedure FromStringDef(const Str: String; const Default: TMD6_512); overload; virtual;
property MD6_512: TMD6_512 read GetMD6_512;
end;
{===============================================================================
--------------------------------------------------------------------------------
TMD6HashParallel
--------------------------------------------------------------------------------
===============================================================================}
type
TMD6ThreadFunction = procedure(Param: Pointer);
TMD6ThreadStartCallback = procedure(Sender: TObject; ThreadFunction: TMD6ThreadFunction; Param: Pointer);
TMD6ThreadStartEvent = procedure(Sender: TObject; ThreadFunction: TMD6ThreadFunction; Param: Pointer) of object;
// internals
type
TMD6ProcessingMode = (tmBuffer,tmFile);
PMD6CommonProcessingNode = ^TMD6CommonProcessingNode;
TMD6CommonProcessingNode = record
IsLastNode: Boolean;
ParentNodePtr: PMD6CommonProcessingNode;
ParentNodePutIndex: Integer;
Counter: Integer;
LevelIndex: Integer;
Index: Int64;
Bytes: TMemSize;
Block: TMD6ProcessingBlock;
end;
TMD6CommonProcessingLevel = record
Index: Integer;
Nodes: array of TMD6CommonProcessingNode;
end;
TMD6CommonProcessingState = record
Levels: array of TMD6CommonProcessingLevel;
end;
TMD6ThreadTask = record
CurrentOffset: Int64;
State: TMD6ProcessingState;
end;
{===============================================================================
TMD6HashParallel - class declaration
===============================================================================}
type
TMD6HashParallel = class(TCustomObject)
protected
fMD6: TMD6;
{
Some of the following fields are accessed from (multiple) working threads.
Data integrity protection mechanisms are as follows:
R - read-only field, immutable during processing, does not need to be
thread-protected
I - accessed using only interlocked functions
C - combined access
}
fHashSettings: record
{R} HashBits: Integer;
{R} Key: TMD6Key;
{R} Rounds: Integer;
RoundsDef: Boolean;
{R} ModeControl: Integer;
MaxThreads: Integer;
MaxSeqNodes: Int64;
end;
fInputMessage: record
{R} ProcessingMode: TMD6ProcessingMode;
{R} Buffer: Pointer;
{R} FileName: String;
{R} Size: UInt64;
end;
fProcessingSettings: record
{R} Sequential: Boolean;
{R} ThreadCount: Integer;
{R} ThreadLevelCount: Integer;
end;
fTasksSettings: record
{R} ChunksPerTask: UInt64;
{R} BytesPerTask: UInt64;
end;
fProcessingVariables: record
{I} StopCounter: Integer;
{I} CurrentOffset: UInt64;
{I} Terminated: Boolean;
end;
fCommonTree: record
{C} State: TMD6CommonProcessingState;
end;
fProgressTracking: record
{I} CurrentIntProgress: UInt64;
end;
fProgUpdInterval: UInt32;
fDoneEvent: TEvent;
fProcessing: Boolean;
fLastProgress: Double;
// events and callbacks
fOnThreadStartCallback: TMD6ThreadStartCallback;
fOnThreadStartEvent: TMD6ThreadStartEvent;
fOnProgressCallback: TFloatCallback;
fOnProgressEvent: TFloatEvent;
// getters setters
Function GetMD6: TMD6; virtual;
procedure SetHashBits(Value: Integer); virtual;
Function GetKey: TMD6Key; virtual;
procedure PutKey(Value: TMD6Key); virtual;
procedure SetRoundsDefault; virtual;
procedure SetRounds(Value: Integer); virtual;
procedure SetModeControl(Value: Integer); virtual;
procedure SetMaxThreads(Value: Integer); virtual;
procedure SetMaxSeqNodes(Value: Int64); virtual;
// parallel processing - all following methods are called from within the worker threads
Function Thread_GetTask(var ThreadTask: TMD6ThreadTask): Boolean; virtual;
procedure Thread_ProcessThreadNode(var ThreadTask: TMD6ThreadTask; Level: Integer; const Data); virtual;
procedure Thread_ProcessThreadNodeFinal(var ThreadTask: TMD6ThreadTask; Level: Integer; PadBytes: TMemSize); virtual;
procedure Thread_CommonNodesEntry(const ThreadTask: TMD6ThreadTask); virtual;
procedure Thread_ProcessCommonNode(NodePtr: PMD6CommonProcessingNode; PutIndex: Integer; const Data); virtual;
procedure Thread_Execute; virtual;
// preparation and execution of parallel processing
Function ParallelPossible(DataSize: UInt64): Boolean; virtual;
procedure ParallelPrepare; virtual;
Function ParallelExecute(Memory: Pointer; Size: TMemSize): Integer; overload; virtual;
Function ParallelExecute(const FileName: String; Size: Int64): Integer; overload; virtual;
Function ParallelExecute: Integer; overload; virtual;
procedure DoThreadStart; virtual;
// object init/final
procedure Initialize; virtual;
// others
procedure ProgressHandler(Sender: TObject; Progress: Double); virtual;
procedure DoProgress; virtual;
public
class Function ProcessorCount: Integer; virtual;
constructor Create;
procedure SetKey(const Key; Size: TMemSize); overload; virtual;
procedure SetKey(const Key: String); overload; virtual;
Function HashMemory(Memory: Pointer; Size: TMemSize): Integer; virtual;
Function HashBuffer(const Buffer; Size: TMemSize): Integer; virtual;
Function HashFile(const FileName: String): Integer; virtual;
property MD6: TMD6 read GetMD6;
property HashBits: Integer read fHashSettings.HashBits write SetHashBits;
property Key: TMD6Key read GetKey write PutKey;
property Rounds: Integer read fHashSettings.Rounds write SetRounds;
property ModeControl: Integer read fHashSettings.ModeControl write SetModeControl;
property MaxThreads: Integer read fHashSettings.MaxThreads write SetMaxThreads;
property MaxSequentialNodes: Int64 read fHashSettings.MaxSeqNodes write SetMaxSeqNodes;
property ProgressUpdateInterval: UInt32 read fProgUpdInterval write fProgUpdInterval;
property OnThreadStartCallback: TMD6ThreadStartCallback read fOnThreadStartCallback write fOnThreadStartCallback;
property OnThreadStartEvent: TMD6ThreadStartEvent read fOnThreadStartEvent write fOnThreadStartEvent;
property OnThreadStart: TMD6ThreadStartEvent read fOnThreadStartEvent write fOnThreadStartEvent;
property OnProgressCallback: TFloatCallback read fOnProgressCallback write fOnProgressCallback;
property OnProgressEvent: TFloatEvent read fOnProgressEvent write fOnProgressEvent;
property OnProgress: TFloatEvent read fOnProgressEvent write fOnProgressEvent;
end;
{===============================================================================
--------------------------------------------------------------------------------
Standalone functions
--------------------------------------------------------------------------------
===============================================================================}
{
Note that there is, for the sake of simplicity, no function implemented for
fixed-length hash types (eg. TMD6_224), only for variant-length type TMD6.
If you want to pass a fixed type, or convert variant-length result to fixed
type, use following conversion functions to do so.
}
Function MD6ToMD6_224(Hash: TMD6): TMD6_224;
Function MD6ToMD6_256(Hash: TMD6): TMD6_256;
Function MD6ToMD6_384(Hash: TMD6): TMD6_384;
Function MD6ToMD6_512(Hash: TMD6): TMD6_512;
Function MD6_224ToMD6(Hash: TMD6_224): TMD6;
Function MD6_256ToMD6(Hash: TMD6_256): TMD6;
Function MD6_384ToMD6(Hash: TMD6_384): TMD6;
Function MD6_512ToMD6(Hash: TMD6_512): TMD6;
Function IsCompatibleMD6_224(Hash: TMD6): Boolean;
Function IsCompatibleMD6_256(Hash: TMD6): Boolean;
Function IsCompatibleMD6_384(Hash: TMD6): Boolean;
Function IsCompatibleMD6_512(Hash: TMD6): Boolean;
//------------------------------------------------------------------------------
Function MD6ToStr(MD6: TMD6): String;
Function StrToMD6(Str: String): TMD6;
Function TryStrToMD6(const Str: String; out MD6: TMD6): Boolean;
Function StrToMD6Def(const Str: String; Default: TMD6): TMD6;
Function CompareMD6(A,B: TMD6): Integer;
Function SameMD6(A,B: TMD6): Boolean;
Function BinaryCorrectMD6(Hash: TMD6): TMD6;
//------------------------------------------------------------------------------
{
For MD6, it is not enough to pass hash from previous step when doing
continuous hashing (BufferMD6 > LastBufferMD6). TDM6State type is introduced
for this purpose.
}
type
TMD6State = type Pointer;
TMD6Settings = record
HashBits: Integer;
Rounds: Integer;
ModeControl: Integer;
Key: TMD6Key;
end;
Function MD6Settings(HashBits,Rounds,ModeControl: Integer; Key: TMD6Key): TMD6Settings; overload;
Function MD6Settings(HashBits,Rounds,ModeControl: Integer; const Key; KeySize: TMemSize): TMD6Settings; overload;
Function MD6Settings(HashBits,Rounds,ModeControl: Integer; const Key: String): TMD6Settings; overload;
Function InitialMD6(Settings: TMD6Settings): TMD6State; overload;
Function InitialMD6(HashBits: Integer = MD6_BITS_DEFAULT): TMD6State; overload;
procedure BufferMD6(State: TMD6State; const Buffer; Size: TMemSize); overload;
Function LastBufferMD6(var State: TMD6State; const Buffer; Size: TMemSize): TMD6;
//------------------------------------------------------------------------------
Function BufferMD6(const Buffer; Size: TMemSize; Settings: TMD6Settings): TMD6; overload;
Function BufferMD6(const Buffer; Size: TMemSize; HashBits: Integer = MD6_BITS_DEFAULT): TMD6; overload;
Function AnsiStringMD6(const Str: AnsiString; Settings: TMD6Settings): TMD6; overload;
Function AnsiStringMD6(const Str: AnsiString; HashBits: Integer = MD6_BITS_DEFAULT): TMD6; overload;
Function WideStringMD6(const Str: WideString; Settings: TMD6Settings): TMD6; overload;
Function WideStringMD6(const Str: WideString; HashBits: Integer = MD6_BITS_DEFAULT): TMD6; overload;
Function StringMD6(const Str: String; Settings: TMD6Settings): TMD6; overload;
Function StringMD6(const Str: String; HashBits: Integer = MD6_BITS_DEFAULT): TMD6; overload;
Function StreamMD6(Stream: TStream; Count: Int64; Settings: TMD6Settings): TMD6; overload;
Function StreamMD6(Stream: TStream; Count: Int64 = -1; HashBits: Integer = MD6_BITS_DEFAULT): TMD6; overload;
Function FileMD6(const FileName: String; Settings: TMD6Settings): TMD6; overload;
Function FileMD6(const FileName: String; HashBits: Integer = MD6_BITS_DEFAULT): TMD6; overload;
//------------------------------------------------------------------------------
type
TMD6Context = type Pointer;
Function MD6_Init(Settings: TMD6Settings): TMD6Context; overload;
Function MD6_Init(HashBits: Integer = MD6_BITS_DEFAULT): TMD6Context; overload;
procedure MD6_Update(Context: TMD6Context; const Buffer; Size: TMemSize);
Function MD6_Final(var Context: TMD6Context; const Buffer; Size: TMemSize): TMD6; overload;
Function MD6_Final(var Context: TMD6Context): TMD6; overload;
Function MD6_Hash(const Buffer; Size: TMemSize; HashBits: Integer = MD6_BITS_DEFAULT): TMD6;
implementation
uses
{$IFDEF Windows}Windows,{$ELSE}BaseUnix,{$ENDIF} Math,
StrRect, BitOps, InterlockedOps, StaticMemoryStream;
{$IFDEF FPC_DisableWarns}
{$DEFINE FPCDWM}
{$DEFINE W5024:={$WARN 5024 OFF}} // Parameter "$1" not used
{$ENDIF}
{===============================================================================
General utilities
===============================================================================}
{$IFDEF Windows}
procedure GetNativeSystemInfo(lpSystemInfo: PSystemInfo); stdcall; external kernel32;
{$ELSE}
const
_SC_NPROCESSORS_ONLN = 84;
Function sysconf(name: cInt): cLong; cdecl; external;
{$ENDIF}
//------------------------------------------------------------------------------
{$IF not Declared(Ceil64)}
Function Ceil64(x: Extended): Int64;
begin
Result := Trunc(x);
If Frac(x) > 0 then
Result := Result + 1;
end;
{$IFEND}
{===============================================================================
--------------------------------------------------------------------------------
TMD6Hash
--------------------------------------------------------------------------------
===============================================================================}
{===============================================================================
TMD6Hash - Implementation constants
===============================================================================}
const
MD6_BITS_MAX = 512;
MD6_MODE_DEFAULT = 64;
MD6_KEY_MAXLEN = 64; // in bytes
MD6_CHUNK_SIZE = 128; // bytes (16 words)
MD6_CHUNK_LEN = 16; // words
MD6_BLOCK_LEN = 89; // words
MD6_BLOCK_KEYSTART = 15;
MD6_BLOCK_KEYEND = 22;
MD6_BLOCK_DATASTART = 25;
MD6_BLOCK_CAPACITY = 512; // bytes (64 words)
MD6_BLOCK_IDX_U = 23; // position of unique node ID word
MD6_BLOCK_IDX_V = 24; // position of control word
// fractional part of sqrt(6)
MD6_VEC_Q: array[0..14] of TMD6Word = (
TMD6Word($7311c2812425cfa0), TMD6Word($6432286434aac8e7),
TMD6Word($b60450e9ef68b7c1), TMD6Word($e8fb23908d9f06f1),
TMD6Word($dd2e76cba691e5bf), TMD6Word($0cd0d63b2c30bc41),
TMD6Word($1f8ccf6823058f8a), TMD6Word($54e5ed5b88e3775d),
TMD6Word($4ad12aae0a6d6031), TMD6Word($3e7f16bb88222e0d),
TMD6Word($8af8671d3fb50c2c), TMD6Word($995ad1178bd25c31),
TMD6Word($c878c1dd04c4b633), TMD6Word($3b72066c7a1552ac),
TMD6Word($0d6f3522631effcb));
MD6_S_0 = TMD6Word($0123456789abcdef);
MD6_S_MASK = TMD6Word($7311c2812425cfa0);
(*
--------------------------------------------------------------------------------
Following constants are not used anywhere in the code, they are instead
directly expanded into numerals where needed or calculated on-the-fly.
--------------------------------------------------------------------------------
{
Round constants MD6_S can be calculated like this:
MD6_S[0] := MD6_S_0;
For i := 1 to High(MD6_S) do
MD6_S[i] := ROL(MD6_S[i - 1],1) xor (MD6_S[i - 1] and MD6_S_STAR)
}
MD6_S: array[0..167] of TMD6Word = (
TMD6Word($0123456789ABCDEF), TMD6Word($0347CACE1376567E),
TMD6Word($058E571C26C8EADC), TMD6Word($0A1CEC3869911F38),
TMD6Word($16291870F3233150), TMD6Word($3E5330E1C66763A0),
TMD6Word($4EB7614288EB84E0), TMD6Word($DF7F828511F68D60),
TMD6Word($EDEE878B23C997E1), TMD6Word($BADD8D976792A863),
TMD6Word($47AA9BAFEB25D8E7), TMD6Word($CC55B5DEF66E796E),
TMD6Word($D8BAEB3DC8F8BBFD), TMD6Word($E165147A91D1FC5B),
TMD6Word($A3CB28F523A234B7), TMD6Word($6497516B67646DCF),
TMD6Word($A93FE2D7EAEC961E), TMD6Word($736E072EF5FDAA3D),
TMD6Word($95DC0C5DCFDEDE5A), TMD6Word($3AA818BA9BB972B5),
TMD6Word($475031F53753A7CA), TMD6Word($CDB0636B4AA6C814),
TMD6Word($DA7084D795695829), TMD6Word($E6F1892E2EF3F873),
TMD6Word($AFF2925C79C638C7), TMD6Word($7CF5A6B8D388790F),
TMD6Word($89FACFF1A710BB1E), TMD6Word($12E55D626A21FD3D),
TMD6Word($37CBFAC4F462375A), TMD6Word($5C963709CCE469B4),
TMD6Word($E93C6C129DEC9AC8), TMD6Word($B36898253FFDBF11),
TMD6Word($55D1B04B5BDEF123), TMD6Word($FAB2E097B7B92366),
TMD6Word($877501AE4B5345ED), TMD6Word($0DFB03DC96A7CE7B),
TMD6Word($1AE70539296A52D6), TMD6Word($27CF0A7372F4E72C),
TMD6Word($6C9F16E7C5CD0978), TMD6Word($B92F2F4E8F9F1BD0),
TMD6Word($435F5C9D1B3B3C21), TMD6Word($C5AFF9BB36577462),
TMD6Word($CA5E33F748ABACE5), TMD6Word($D6AC656F9176D56B),
TMD6Word($FF588ADE22C96FF7), TMD6Word($8DA1973C6593904F),
TMD6Word($1A42AC78EF26A09F), TMD6Word($2685D8F1FA69C1BE),
TMD6Word($6F0A7162D4F242DC), TMD6Word($BD14A2C5ADC4C738),
TMD6Word($4B39C70A7F8D4951), TMD6Word($D5624C14DB1FDBA2),
TMD6Word($FBC4D829B63A7CE5), TMD6Word($848970524854B56B),
TMD6Word($0913A0A490ADEFF7), TMD6Word($1336C1C9217E104E),
TMD6Word($357D431362D8209C), TMD6Word($5BEBC427E5B041B8),
TMD6Word($E4D6484EEF40C2D0), TMD6Word($A9BCD09DFA814721),
TMD6Word($726961BAD503C963), TMD6Word($96D383F5AE065BE6),
TMD6Word($3FB6856A7808FC6D), TMD6Word($4C7D8AD4D01134FA),
TMD6Word($D8EA9729A0236D54), TMD6Word($E1D5AC52606797A9),
TMD6Word($A2BAD8A4E0EAA8F3), TMD6Word($676571C9E1F5D947),
TMD6Word($ADCBA312E3CE7B8E), TMD6Word($7A96C425E798BC9D),
TMD6Word($873D484AEB31F5BA), TMD6Word($0D6BD095F6422ED5),
TMD6Word($1BD661AAC884532A), TMD6Word($24BC83D5910CE574),
TMD6Word($6969852A221D0FC8), TMD6Word($B3D28A54643F1010),
TMD6Word($54B596A8EC5B2021), TMD6Word($F97AAFD1FCB74062),
TMD6Word($83E5DD22DD4BC0E5), TMD6Word($04CA7A45BE96416B),
TMD6Word($0994B68A5928C3F6), TMD6Word($1239EF94B271444C),
TMD6Word($36621DA944C3CC98), TMD6Word($5EC43BD38D8655B0),
TMD6Word($EF8875261F08EEC0), TMD6Word($BC10AA4C3A111301),
TMD6Word($4831D69854232503), TMD6Word($D0726FB0AC674F06),
TMD6Word($F0F49DE17CEBD10D), TMD6Word($91F9BB43DDF6631B),
TMD6Word($32E2F486BFC88537), TMD6Word($57C5298D5B918F4E),
TMD6Word($FC8B539BB722919C), TMD6Word($8917E5B64A65A2B9),
TMD6Word($133E0BEC94EEC7D3), TMD6Word($356C15592DF94826),
TMD6Word($5BD82AB37FD3D86C), TMD6Word($E4A057E7DBA678F8),
TMD6Word($A940ED4EB768B951), TMD6Word($73811A9D4AF1FBA3),
TMD6Word($940337BB95C23CE6), TMD6Word($38076DF62F84756D),
TMD6Word($400F9B6C7B0CAFFA), TMD6Word($C01EB4D8D61DD054),
TMD6Word($C02DE931A83E60A9), TMD6Word($C05A1262705881F3),
TMD6Word($C0A426C4C0B18247), TMD6Word($C1484F098142868F),
TMD6Word($C390DC1202858B9F), TMD6Word($C4317824050E9CBF),
TMD6Word($C873B0480E19B5DF), TMD6Word($D0F6E0901832EE3F),
TMD6Word($F1FD01A03045125F), TMD6Word($92EB03C0408F26BF),
TMD6Word($37D70500811B4BDF), TMD6Word($5CBF0A010237DC3E),
TMD6Word($E96F1603044A745C), TMD6Word($B3DF2E070C94ACB9),
TMD6Word($54AF5E0F1D2DD5D3), TMD6Word($F95FFE1F3E7E6E26),
TMD6Word($83AE3E3F58D8926D), TMD6Word($045C7E7FB1B1A6FB),
TMD6Word($08A8BEFE4342CB56), TMD6Word($1151FF7C86855DAC),
TMD6Word($33B23CF9090FF6F8), TMD6Word($54747973121A2B50),
TMD6Word($F8F8B2E724345DA0), TMD6Word($81E1E74F6C4CF6E1),
TMD6Word($02C20C9FFC9D2B63), TMD6Word($078419BEDD3F5DE6),
TMD6Word($0C0833FDBE5BF66C), TMD6Word($1810657A58B62AF8),
TMD6Word($20308AF4B1485F50), TMD6Word($607197694290F1A0),
TMD6Word($A0F2ACD3852122E0), TMD6Word($61F5D9260E634761),
TMD6Word($A2FA724C18E7C9E2), TMD6Word($67E4A69831EA5A65),
TMD6Word($ACC9CFB043F4FEEA), TMD6Word($79925DE087CD3375),
TMD6Word($8234FB410B9F65CA), TMD6Word($06793483173B8E15),
TMD6Word($0EE369872A56922A), TMD6Word($1FC7938F74A9A674),
TMD6Word($2C8EA59FCD72CAC8), TMD6Word($791DCBBE9EC55F10),
TMD6Word($832A55FD398FF120), TMD6Word($0554EB7B531A2361),
TMD6Word($0BB914F7A63445E2), TMD6Word($1463296E684CCE64),
TMD6Word($38C752DCF09D52E8), TMD6Word($418FE739C13FE770),
TMD6Word($C21E0C72825A09C0), TMD6Word($C62C18E504B41A01),
TMD6Word($CE58314B0D4C3E03), TMD6Word($DEA062971E9C7207),
TMD6Word($EF4087AF393CA60F), TMD6Word($BD818DDF525DCA1F),
TMD6Word($4A029B3FA4BE5E3F), TMD6Word($D605B47E6D58F25E),
TMD6Word($FE0AE8FCFEB126BD), TMD6Word($8E151179D9434BDB),
TMD6Word($1E3B22F2B287DC37), TMD6Word($2E674765450A744E),
TMD6Word($7ECFCCCB8E14AC9C), TMD6Word($8F9E5916182DD5B8),
TMD6Word($1C2CF22C307E6ED1), TMD6Word($2859265840D89322));
// tap positions
MD6_TAP: array[0..4] of Integer = (17,18,21,31,67);
// right shifts
MD6_SHIFT_R: array[0..15] of Integer = (
10, 5, 13, 10, 11, 12, 2, 7, 14, 15, 7, 13, 11, 7, 6, 12);
// left shifts
MD6_SHIFT_L: array[0..15] of Integer = (
11, 24, 9, 16, 15, 9, 27, 15, 6, 2, 29, 8, 15, 5, 31, 9);
*)
{===============================================================================
TMD6Hash - utility functions
===============================================================================}
Function GetControlWord(Rnds, ModeCtrl, PadBits, KeyLen, HashBits: Integer; Final: Boolean): TMD6Word;
begin
Result := 0 or
(TMD6Word(Rnds and $FFF) shl 48) or
(TMD6Word(ModeCtrl and $FF) shl 40) or
(TMD6Word(Integer(IfThen(Final,1,0)) and $F) shl 36) or
(TMD6Word(PadBits and $FFFF) shl 20) or
(TMD6Word(KeyLen and $FF) shl 12) or
TMD6Word(HashBits and $FFF);
end;
//------------------------------------------------------------------------------
Function GetUniqueNodeIDWord(LevelNumber: Integer; NodeIndex: Int64): TMD6Word;
begin
Result := (TMD6Word(LevelNumber and $FF) shl 56) or (NodeIndex and $00FFFFFFFFFFFFFF);
end;
//------------------------------------------------------------------------------
procedure InitializeBlock(out Block: TMD6ProcessingBlock; Rounds: Integer; Key: TMD6Key);
var
i: Integer;
begin
Block := nil;
SetLength(Block,MD6_BLOCK_LEN + (Rounds * MD6_CHUNK_LEN));
For i := Low(MD6_VEC_Q) to High(MD6_VEC_Q) do
Block[i] := MD6_VEC_Q[i];
// prepare key
If Length(Key) > 0 then
begin
Move(Key[0],Block[MD6_BLOCK_KEYSTART],Length(Key));
{$IFNDEF ENDIAN_BIG}
For i := MD6_BLOCK_KEYSTART to MD6_BLOCK_KEYEND do
EndianSwapValue(Block[i]);
{$ENDIF}
end;
end;
//------------------------------------------------------------------------------
procedure CompressBlock(var Block: TMD6ProcessingBlock);
var
i: Integer;
RoundConst: TMD6Word;
x: TMD6Word;
begin
// block is assumed to be completely prepared, only do endianness corrections
{$IFNDEF ENDIAN_BIG}
For i := MD6_BLOCK_DATASTART to Pred(MD6_BLOCK_LEN) do
EndianSwapValue(Block[i]);
{$ENDIF}
// main calculation...
RoundConst := MD6_S_0;
i := MD6_BLOCK_LEN;
while i <= (Length(Block) - MD6_CHUNK_LEN) do
begin
// unrolled round (16 steps)...
// step 0
x := RoundConst xor Block[i - 89] xor Block[i - 17];
x := x xor (Block[i - 18] and Block[i - 21]);
x := x xor (Block[i - 31] and Block[i - 67]);
x := x xor (x shr 10);
Block[i] := x xor (x shl 11);
// step 1
x := RoundConst xor Block[i - 88] xor Block[i - 16];
x := x xor (Block[i - 17] and Block[i - 20]);
x := x xor (Block[i - 30] and Block[i - 66]);
x := x xor (x shr 5);
Block[i + 1] := x xor (x shl 24);
// step 2
x := RoundConst xor Block[i - 87] xor Block[i - 15];
x := x xor (Block[i - 16] and Block[i - 19]);
x := x xor (Block[i - 29] and Block[i - 65]);
x := x xor (x shr 13);
Block[i + 2] := x xor (x shl 9);
// step 3
x := RoundConst xor Block[i - 86] xor Block[i - 14];
x := x xor (Block[i - 15] and Block[i - 18]);
x := x xor (Block[i - 28] and Block[i - 64]);
x := x xor (x shr 10);
Block[i + 3] := x xor (x shl 16);
// step 4
x := RoundConst xor Block[i - 85] xor Block[i - 13];
x := x xor (Block[i - 14] and Block[i - 17]);
x := x xor (Block[i - 27] and Block[i - 63]);
x := x xor (x shr 11);
Block[i + 4] := x xor (x shl 15);
// step 5
x := RoundConst xor Block[i - 84] xor Block[i - 12];
x := x xor (Block[i - 13] and Block[i - 16]);
x := x xor (Block[i - 26] and Block[i - 62]);
x := x xor (x shr 12);
Block[i + 5] := x xor (x shl 9);
// step 6
x := RoundConst xor Block[i - 83] xor Block[i - 11];
x := x xor (Block[i - 12] and Block[i - 15]);
x := x xor (Block[i - 25] and Block[i - 61]);
x := x xor (x shr 2);
Block[i + 6] := x xor (x shl 27);
// step 7
x := RoundConst xor Block[i - 82] xor Block[i - 10];
x := x xor (Block[i - 11] and Block[i - 14]);
x := x xor (Block[i - 24] and Block[i - 60]);
x := x xor (x shr 7);
Block[i + 7] := x xor (x shl 15);
// step 8
x := RoundConst xor Block[i - 81] xor Block[i - 9];
x := x xor (Block[i - 10] and Block[i - 13]);
x := x xor (Block[i - 23] and Block[i - 59]);
x := x xor (x shr 14);
Block[i + 8] := x xor (x shl 6);
// step 9
x := RoundConst xor Block[i - 80] xor Block[i - 8];
x := x xor (Block[i - 9] and Block[i - 12]);
x := x xor (Block[i - 22] and Block[i - 58]);
x := x xor (x shr 15);
Block[i + 9] := x xor (x shl 2);
// step 10
x := RoundConst xor Block[i - 79] xor Block[i - 7];
x := x xor (Block[i - 8] and Block[i - 11]);
x := x xor (Block[i - 21] and Block[i - 57]);
x := x xor (x shr 7);
Block[i + 10] := x xor (x shl 29);
// step 11
x := RoundConst xor Block[i - 78] xor Block[i - 6];
x := x xor (Block[i - 7] and Block[i - 10]);
x := x xor (Block[i - 20] and Block[i - 56]);
x := x xor (x shr 13);
Block[i + 11] := x xor (x shl 8);
// step 12
x := RoundConst xor Block[i - 77] xor Block[i - 5];
x := x xor (Block[i - 6] and Block[i - 9]);
x := x xor (Block[i - 19] and Block[i - 55]);
x := x xor (x shr 11);
Block[i + 12] := x xor (x shl 15);
// step 13
x := RoundConst xor Block[i - 76] xor Block[i - 4];
x := x xor (Block[i - 5] and Block[i - 8]);
x := x xor (Block[i - 18] and Block[i - 54]);
x := x xor (x shr 7);
Block[i + 13] := x xor (x shl 5);
// step 14
x := RoundConst xor Block[i - 75] xor Block[i - 3];
x := x xor (Block[i - 4] and Block[i - 7]);
x := x xor (Block[i - 17] and Block[i - 53]);
x := x xor (x shr 6);
Block[i + 14] := x xor (x shl 31);
// step 15
x := RoundConst xor Block[i - 74] xor Block[i - 2];
x := x xor (Block[i - 3] and Block[i - 6]);
x := x xor (Block[i - 16] and Block[i - 52]);
x := x xor (x shr 12);
Block[i + 15] := x xor (x shl 9);
// recalculate round constant
RoundConst := ROL(RoundConst,1) xor (RoundConst and MD6_S_MASK);