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SynSQLite3Static.pas
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SynSQLite3Static.pas
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/// SQLite3 3.34.0 Database engine - statically linked for Windows/Linux
// - this unit is a part of the freeware Synopse mORMot framework,
// licensed under a MPL/GPL/LGPL tri-license; version 1.18
unit SynSQLite3Static;
{
This file is part of Synopse mORMot framework.
Synopse mORMot framework. Copyright (C) 2020 Arnaud Bouchez
Synopse Informatique - https://synopse.info
*** BEGIN LICENSE BLOCK *****
Version: MPL 1.1/GPL 2.0/LGPL 2.1
The contents of this file are subject to the Mozilla Public License Version
1.1 (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.mozilla.org/MPL
Software distributed under the License is distributed on an "AS IS" basis,
WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
for the specific language governing rights and limitations under the License.
The Original Code is Synopse mORMot framework.
The Initial Developer of the Original Code is Arnaud Bouchez.
Portions created by the Initial Developer are Copyright (C) 2020
the Initial Developer. All Rights Reserved.
Contributor(s):
- Alfred Glaenzer (alf)
- Maciej Izak (hnb)
Alternatively, the contents of this file may be used under the terms of
either the GNU General Public License Version 2 or later (the "GPL"), or
the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
in which case the provisions of the GPL or the LGPL are applicable instead
of those above. If you wish to allow use of your version of this file only
under the terms of either the GPL or the LGPL, and not to allow others to
use your version of this file under the terms of the MPL, indicate your
decision by deleting the provisions above and replace them with the notice
and other provisions required by the GPL or the LGPL. If you do not delete
the provisions above, a recipient may use your version of this file under
the terms of any one of the MPL, the GPL or the LGPL.
***** END LICENSE BLOCK *****
Statically linked SQLite3 3.34.0 engine with optional AES encryption
**********************************************************************
To be declared in your project uses clause: will fill SynSQlite3.sqlite3
global variable with all statically linked .obj API entries.
sqlite3 := TSQLite3LibraryStatic.Create; is called at unit initialization.
Will work on Windows 32-bit or 64-bit (with Delphi or FPC, with expected
.obj / .o) or Linux 32-bit 64-bit on Intel and ARM (with FPC, with the
corresponding .o) under other platforms, this unit will just do nothing
(but compile).
To patch and compile the official SQlite3 amalgamation file, follow the
instruction from SQLite3\amalgamation\ReadMe.md
Uses TSQLite3LibraryDynamic to access external library (e.g. sqlite3.dll/.so)
}
{$I Synopse.inc} // define HASINLINE CPU32 CPU64 OWNNORMTOUPPER
interface
{$ifdef NOSQLITE3STATIC} // conditional defined -> auto-load local .dll/.so
uses
SysUtils,
SynSQLite3;
implementation
uses
SynCommons;
procedure DoInitialization;
begin
FreeAndNil(sqlite3);
try
sqlite3 := TSQLite3LibraryDynamic.Create(SQLITE_LIBRARY_DEFAULT_NAME);
sqlite3.ForceToUseSharedMemoryManager; // faster process
except
on E: Exception do
{$ifdef LINUX}
writeln(SQLITE_LIBRARY_DEFAULT_NAME+' initialization failed with ',
E.ClassName,': ',E.Message);
{$endif}
end;
end;
initialization
DoInitialization;
{$else NOSTATIC}
uses
{$ifdef MSWINDOWS}
Windows,
{$else}
{$ifdef FPC}
SynFPCLinux,
BaseUnix,
{$endif}
{$ifdef KYLIX3}
Types,
LibC,
SynKylix,
{$endif}
{$endif}
Classes,
SysUtils,
SynCommons,
SynSQLite3,
SynCrypto;
type
/// access class to the static .obj SQLite3 engine
// - the intialization section of this unit calls:
// ! sqlite3 := TSQLite3LibraryStatic.Create;
// therefore, adding SynSQLite3Static to your uses clause is enough to use
// the statically linked SQLite3 engine with SynSQLite3
TSQLite3LibraryStatic = class(TSQLite3Library)
public
/// fill the internal API reference s with the static .obj engine
constructor Create; override;
/// unload the static library
destructor Destroy; override;
end;
/// use this procedure to change the password for an existing SQLite3 database file
// - convenient and faster alternative to the sqlite3.rekey() API call
// - conversion is done in-place at file level, with no SQL nor BTree pages
// involved, therefore it can process very big files with best possible speed
// - the OldPassWord must be correct, otherwise the resulting file will be corrupted
// - any password can be '' to mark no encryption as input or output
// - the password may be a JSON-serialized TSynSignerParams object, or will use
// AES-OFB-128 after SHAKE_128 with rounds=1000 and a fixed salt on plain password text
// - please note that this encryption is compatible only with SQlite3 files made
// with SynSQLiteStatic.pas unit (not external/official/wxsqlite3 dll)
// - implementation is NOT compatible with the official SQLite Encryption Extension
// (SEE) file format, not the wxsqlite3 extension, but is (much) faster thanks
// to our SynCrypto AES-NI enabled unit
// - if the key is not correct, a ESQLite3Exception will be raised with
// 'database disk image is malformed' (SQLITE_CORRUPT) at database opening
// - see also IsSQLite3File/IsSQLite3FileEncrypted functions
// - warning: this encryption is NOT compatible with our previous (<1.18.4413)
// cyphered format, which was much less safe (simple XOR on fixed tables), and
// was not working on any database size, making unclean patches to the official
// sqlite3.c amalgamation file, so is deprecated and unsupported any longer -
// see OldSQLEncryptTablePassWordToPlain() to convert your existing databases
function ChangeSQLEncryptTablePassWord(const FileName: TFileName;
const OldPassWord, NewPassword: RawUTF8): boolean;
/// this function may be used to create a plain database file from an existing
// one encrypted with our old/deprecated/unsupported format (<1.18.4413)
// - then call ChangeSQLEncryptTablePassWord() to convert to the new safer format
procedure OldSQLEncryptTablePassWordToPlain(const FileName: TFileName;
const OldPassWord: RawUTF8);
/// could be used to detect a database in old/deprecated/unsupported format (<1.18.4413)
// - to call OldSQLEncryptTablePassWordToPlain + ChangeSQLEncryptTablePassWord
// and switch to the new format
function IsOldSQLEncryptTable(const FileName: TFileName): boolean;
var
/// global flag to use initial AES encryption scheme
// - IV derivation was hardened in revision 1.18.4607 - set TRUE to this
// global constant to use the former implementation (theoritically slightly
// less resistant to brute force attacks) and convert existing databases
ForceSQLite3LegacyAES: boolean;
implementation
{$ifdef FPC} // FPC expects .o linking, and only one version including FTS
{$ifdef MSWINDOWS}
{$ifdef CPU64}
const _PREFIX = '';
{$L .\static\x86_64-win64\sqlite3.o}
{$linklib .\static\x86_64-win64\libkernel32.a}
{$linklib .\static\x86_64-win64\libgcc.a}
{$linklib .\static\x86_64-win64\libmsvcrt.a}
{$else}
const _PREFIX = '_';
{$L .\static\i386-win32\sqlite3.o}
{$linklib .\static\i386-win32\libkernel32.a}
{$linklib .\static\i386-win32\libgcc.a}
{$linklib .\static\i386-win32\libmsvcrt.a}
{$endif CPU64}
{$endif MSWINDOWS}
{$ifdef Darwin}
const _PREFIX = '_';
{$ifdef CPU64}
{$linklib .\static\x86_64-darwin\libsqlite3.a}
{$else}
{$linklib .\static\i386-darwin\libsqlite3.a}
{$endif}
{$endif Darwin}
{$ifdef ANDROID}
const _PREFIX = '';
{$ifdef CPUAARCH64}
{$L .\static\aarch64-android\libsqlite3.a}
{$L .\static\aarch64-android\libgcc.a}
{$endif CPUAARCH64}
{$ifdef CPUARM}
{$L .\static\arm-android\libsqlite3.a}
{$L .\static\arm-android\libgcc.a}
{$endif CPUARM}
{$endif ANDROID}
{$ifdef FREEBSD}
{$ifdef CPUX86}
const _PREFIX = '';
{$L .\static\i386-freebsd\sqlite3.o}
{$ifdef FPC_CROSSCOMPILING}
{$linklib .\static\i386-freebsd\libgcc.a}
{$endif}
{$endif CPUX86}
{$ifdef CPUX64}
const _PREFIX = '';
{$L .\static\x86_64-freebsd\sqlite3.o}
{$ifdef FPC_CROSSCOMPILING}
{$linklib .\static\x86_64-freebsd\libgcc.a}
{$endif}
{$endif CPUX64}
{$endif FREEBSD}
{$ifdef OPENBSD}
{$ifdef CPUX86}
const _PREFIX = '';
{$L .\static\i386-openbsd\sqlite3.o}
{$ifdef FPC_CROSSCOMPILING}
{$linklib .\static\i386-openbsd\libgcc.a}
{$endif}
{$endif CPUX86}
{$ifdef CPUX64}
const _PREFIX = '';
{$L .\static\x86_64-openbsd\sqlite3.o}
{$ifdef FPC_CROSSCOMPILING}
{$linklib .\static\x86_64-openbsd\libgcc.a}
{$endif}
{$endif CPUX64}
{$endif OPENBSD}
{$if defined(Linux) and not defined(BSD) and not defined(Android)}
const _PREFIX = '';
{$ifdef CPUAARCH64}
{$L .\static\aarch64-linux\sqlite3.o}
{$L .\static\aarch64-linux\libgcc.a}
{$endif CPUAARCH64}
{$ifdef CPUARM}
{$L .\static\arm-linux\sqlite3.o}
{$L .\static\arm-linux\libgcc.a}
{$endif CPUARM}
{$ifdef CPUX86}
{$L .\static\i386-linux\sqlite3.o}
{$ifdef FPC_CROSSCOMPILING}
{$linklib .\static\i386-linux\libgcc.a}
{$endif}
{$endif CPUX86}
{$ifdef CPUX64}
{$L .\static\x86_64-linux\sqlite3.o}
{$ifdef FPC_CROSSCOMPILING}
{$linklib .\static\x86_64-linux\libgcc.a}
{$endif}
{$endif CPUX64}
{$ifend}
function log(x: double): double; cdecl; public name _PREFIX+'log'; export;
begin
result := ln(x);
end;
{$ifdef MSWINDOWS}
{$ifdef CPUX86} // not a compiler intrinsic on x86
function _InterlockedCompareExchange(var Dest: longint; New,Comp: longint): longint; stdcall;
public alias: '_InterlockedCompareExchange@12';
begin
result := InterlockedCompareExchange(Dest,New,Comp);
end;
{$endif CPUX86}
{$endif MSWINDOWS}
{$ifdef DARWIN}
function moddi3(num, den: int64): int64; cdecl; public alias: '___moddi3';
begin
result := num mod den;
end;
function umoddi3(num, den: uint64): uint64; cdecl; public alias: '___umoddi3';
begin
result := num mod den;
end;
function divdi3(num, den: int64): int64; cdecl; public alias: '___divdi3';
begin
result := num div den;
end;
function udivdi3(num, den: uint64): uint64; cdecl; public alias: '___udivdi3';
begin
result := num div den;
end;
{$endif DARWIN}
{$ifdef ANDROID}
{$ifdef CPUARM}
function bswapsi2(num:uint32):uint32; cdecl; public alias: '__bswapsi2';
asm
rev r0, r0 // reverse bytes in parameter and put into result register
bx lr
end;
function bswapdi2(num:uint64):uint64; cdecl; public alias: '__bswapdi2';
asm
rev r2, r0 // r2 = rev(r0)
rev r0, r1 // r0 = rev(r1)
mov r1, r2 // r1 = r2 = rev(r0)
bx lr
end;
{$endif}
{$endif ANDROID}
{$else FPC}
// Delphi has a diverse linking strategy, since $linklib doesn't exist :(
{$ifdef MSWINDOWS}
{$ifdef CPU64}
{$L sqlite3.o} // compiled with C++ Builder 10.3 Community Edition bcc64
{$else}
{$L sqlite3.obj} // compiled with free Borland C++ Compiler 5.5
{$endif}
{$else}
{$ifdef KYLIX3} // in practice, we failed to compile SQLite3 with gcc 2 :(
{$L kylix/sqlite3/sqlite3.o}
{$L kylix/sqlite3/_divdi3.o}
{$L kylix/sqlite3/_moddi3.o}
{$L kylix/sqlite3/_udivdi3.o}
{$L kylix/sqlite3/_umoddi3.o}
{$L kylix/sqlite3/_cmpdi2.o}
{$endif KYLIX3}
{$endif MSWINDOWS}
// those functions will be called only under Delphi + Win32/Win64
function malloc(size: cardinal): Pointer; cdecl; { always cdecl }
begin
GetMem(Result, size);
end;
procedure free(P: Pointer); cdecl; { always cdecl }
begin
FreeMem(P);
end;
function realloc(P: Pointer; Size: Integer): Pointer; cdecl; { always cdecl }
begin
result := P;
ReallocMem(result,Size);
end;
function rename(oldname, newname: PUTF8Char): integer; cdecl; { always cdecl }
begin
if RenameFile(UTF8DecodeToString(oldname,StrLen(oldname)),
UTF8DecodeToString(newname,StrLen(newname))) then
result := 0 else
result := -1;
end;
{$ifdef MSWINDOWS}
{$ifdef CPU32} // Delphi Win32 will link static Borland C++ sqlite3.obj
// we then implement all needed Borland C++ runtime functions in pure pascal:
function _ftol: Int64;
// Borland C++ float to integer (Int64) conversion
asm
jmp System.@Trunc // FST(0) -> EDX:EAX, as expected by BCC32 compiler
end;
function _ftoul: Int64;
// Borland C++ float to integer (Int64) conversion
asm
jmp System.@Trunc // FST(0) -> EDX:EAX, as expected by BCC32 compiler
end;
var __turbofloat: word; { not used, but must be present for linking }
// Borland C++ and Delphi share the same low level Int64 _ll*() functions:
procedure _lldiv;
asm
jmp System.@_lldiv
end;
procedure _lludiv;
asm
jmp System.@_lludiv
end;
procedure _llmod;
asm
jmp System.@_llmod
end;
procedure _llmul;
asm
jmp System.@_llmul
end;
procedure _llumod;
asm
jmp System.@_llumod
end;
procedure _llshl;
asm
jmp System.@_llshl
end;
procedure _llshr;
asm
{$ifndef ENHANCEDRTL} // need this code for Borland/CodeGear default System.pas
shrd eax, edx, cl
sar edx, cl
cmp cl, 32
jl @@Done
cmp cl, 64
jge @@RetSign
mov eax, edx
sar edx, 31
ret
@@RetSign:
sar edx, 31
mov eax, edx
@@Done:
{$else}
// our customized System.pas didn't forget to put _llshr in its interface :)
jmp System.@_llshr
{$endif}
end;
procedure _llushr;
asm
jmp System.@_llushr
end;
function log(const val: double): double; cdecl; { always cdecl }
asm
fld qword ptr val
fldln2
fxch
fyl2x
end;
{$endif CPU32}
{$endif MSWINDOWS}
function memset(P: Pointer; B: Integer; count: Integer): pointer; cdecl; { always cdecl }
// a fast full pascal version of the standard C library function
begin
FillCharFast(P^, count, B);
result := P;
end;
function memmove(dest, source: pointer; count: Integer): pointer; cdecl; { always cdecl }
{$ifdef FPC}public name{$ifdef CPU64}'memmove'{$else}'_memmove'{$endif};{$endif}
// a fast full pascal version of the standard C library function
begin
MoveFast(source^, dest^, count); // move() is overlapping-friendly
result := dest;
end;
function memcpy(dest, source: Pointer; count: Integer): pointer; cdecl; { always cdecl }
{$ifdef FPC}public name{$ifdef CPU64}'memcpy'{$else}'_memcpy'{$endif};{$endif}
// a fast full pascal version of the standard C library function
begin
MoveFast(source^, dest^, count);
result := dest;
end;
function strlen(p: PAnsiChar): integer; cdecl; { always cdecl }
{$ifdef FPC}public name{$ifdef CPU64}'strlen'{$else}'_strlen'{$endif};{$endif}
// a fast full pascal version of the standard C library function
begin // called only by some obscure FTS3 functions (normal code use dedicated functions)
result := SynCommons.StrLen(pointer(p));
end;
function strcmp(p1,p2: PAnsiChar): integer; cdecl; { always cdecl }
{$ifdef FPC}public name{$ifdef CPU64}'strcmp'{$else}'_strcmp'{$endif};{$endif}
// a fast full pascal version of the standard C library function
begin // called only by some obscure FTS3 functions (normal code use dedicated functions)
result := SynCommons.StrComp(p1,p2);
end;
function strcspn(str,reject: PAnsiChar): integer; cdecl;
{$ifdef FPC}public name{$ifdef CPU64}'strcspn'{$else}'_strcspn'{$endif};{$endif}
begin // called e.g. during LIKE process
result := SynCommons.strcspn(str,reject); // use SSE4.2 if available
end;
function strrchr(s: PAnsiChar; c: AnsiChar): PAnsiChar; cdecl;
{$ifdef FPC}public name{$ifdef CPU64}'strrchr'{$else}'_strrchr'{$endif};{$endif}
begin // simple full pascal version of the standard C library function
result := nil;
if s<>nil then
while s^<>#0 do begin
if s^=c then
result := s;
inc(s);
end;
end;
function memcmp(p1, p2: pByte; Size: integer): integer; cdecl; { always cdecl }
{$ifdef FPC}
public name{$ifdef CPU64}'memcmp'{$else}'_memcmp'{$endif};
begin
result := CompareByte(p1,p2,Size); // use FPC
end;
{$else}
begin // full pascal version of the standard C library function
if (p1<>p2) and (Size<>0) then
if p1<>nil then
if p2<>nil then begin
repeat
if p1^=p2^ then begin
inc(p1);
inc(p2);
dec(Size);
if Size<>0 then
continue else break;
end;
result := p1^-p2^;
exit;
until false;
result := 0;
end else
result := 1 else
result := -1 else
result := 0;
end;
{$endif}
function strncmp(p1, p2: PByte; Size: integer): integer; cdecl; { always cdecl }
{$ifdef FPC}public name{$ifdef CPU64}'strncmp'{$else}'_strncmp'{$endif};{$endif}
var i: integer;
begin // a fast full pascal version of the standard C library function
for i := 1 to Size do begin
result := p1^-p2^;
if (result<>0) or (p1^=0) then
exit;
inc(p1);
inc(p2);
end;
result := 0;
end;
type
// qsort() is used if SQLITE_ENABLE_FTS3 is defined
// this function type is defined for calling termDataCmp() in sqlite3.c
qsort_compare_func = function(P1,P2: pointer): integer; cdecl; { always cdecl }
procedure QuickSortPtr(base: PPointerArray; L, R: Integer; comparF: qsort_compare_func);
var I, J, P: Integer;
PP, C: PAnsiChar;
begin
repeat // from SQLite (FTS), With=sizeof(PAnsiChar) AFAIK
I := L;
J := R;
P := (L+R) shr 1;
repeat
PP := @base[P];
while comparF(@base[I],PP)<0 do
inc(I);
while comparF(@base[J],PP)>0 do
dec(J);
if I<=J then begin
C := base[I];
base[I] := base[J];
base[J] := C; // fast memory exchange
if P=I then P := J else if P=J then P := I;
inc(I);
dec(J);
end;
until I>J;
if L<J then
QuickSortPtr(base, L, J, comparF);
L := I;
until I>=R;
end;
procedure QuickSort(baseP: PAnsiChar; Width: integer; L, R: Integer; comparF: qsort_compare_func);
// code below is very fast and optimized
procedure Exchg(P1,P2: PAnsiChar; Size: integer);
var B: AnsiChar;
i: integer;
begin
for i := 0 to Size-1 do begin
B := P1[i];
P1[i] := P2[i];
P2[i] := B;
end;
end;
var I, J, P: Integer;
PP, C: PAnsiChar;
begin
repeat // generic sorting algorithm
I := L;
J := R;
P := (L+R) shr 1;
repeat
PP := baseP+P*Width; // compute PP at every loop, since P may change
C := baseP+I*Width;
while comparF(C,PP)<0 do begin
inc(I);
inc(C,width); // avoid slower multiplication in loop
end;
C := baseP+J*Width;
while comparF(C,PP)>0 do begin
dec(J);
dec(C,width); // avoid slower multiplication in loop
end;
if I<=J then begin
Exchg(baseP+I*Width,baseP+J*Width,Width); // fast memory exchange
if P=I then P := J else if P=J then P := I;
inc(I);
dec(J);
end;
until I>J;
if L<J then
QuickSort(baseP, Width, L, J, comparF);
L := I;
until I>=R;
end;
procedure qsort(baseP: pointer; NElem, Width: integer; comparF: pointer); cdecl; { always cdecl }
{$ifdef FPC}public name{$ifdef CPU64}'qsort'{$else}'_qsort'{$endif};{$endif}
// a fast full pascal version of the standard C library function
begin
if (cardinal(NElem)>1) and (Width>0) then
if Width=sizeof(pointer) then
QuickSortPtr(baseP, 0, NElem-1, qsort_compare_func(comparF)) else
QuickSort(baseP, Width, 0, NElem-1, qsort_compare_func(comparF));
end;
var
{ as standard C library documentation states:
Statically allocated buffer, shared by the functions gmtime() and localtime().
Each call of these functions overwrites the content of this structure.
-> since timing is not thread-dependent, it's OK to share this buffer :) }
atm: packed record
tm_sec: Integer; { Seconds. [0-60] (1 leap second) }
tm_min: Integer; { Minutes. [0-59] }
tm_hour: Integer; { Hours. [0-23] }
tm_mday: Integer; { Day. [1-31] }
tm_mon: Integer; { Month. [0-11] }
tm_year: Integer; { Year - 1900. }
tm_wday: Integer; { Day of week. [0-6] }
tm_yday: Integer; { Days in year. [0-365] }
tm_isdst: Integer; { DST. [-1/0/1]}
__tm_gmtoff: Integer; { Seconds east of UTC. }
__tm_zone: ^Char; { Timezone abbreviation.}
end;
function localtime64(const t: Int64): pointer; cdecl; { always cdecl }
{$ifdef FPC}public name '__imp__localtime64';{$endif}
// a fast full pascal version of the standard C library function
var {$ifdef MSWINDOWS}
uTm: TFileTime;
lTm: TFileTime;
{$endif}
S: TSystemTime;
begin
{$ifdef MSWINDOWS}
Int64(uTm) := (t+11644473600)*10000000; // unix time to dos file time
FileTimeToLocalFileTime(uTM,lTM);
FileTimeToSystemTime(lTM,S);
atm.tm_sec := S.wSecond;
atm.tm_min := S.wMinute;
atm.tm_hour := S.wHour;
atm.tm_mday := S.wDay;
atm.tm_mon := S.wMonth-1;
atm.tm_year := S.wYear-1900;
atm.tm_wday := S.wDayOfWeek;
{$else}
GetNowUTCSystem(S);
atm.tm_sec := S.Second;
atm.tm_min := S.Minute;
atm.tm_hour := S.Hour;
atm.tm_mday := S.Day;
atm.tm_mon := S.Month-1;
atm.tm_year := S.Year-1900;
atm.tm_wday := S.Day;
{$endif}
result := @atm;
end;
function localtime(t: PCardinal): pointer; cdecl; { always cdecl }
{$ifdef FPC}public name{$ifdef CPU64}'localtime32'{$else}'__localtime32'{$endif};{$endif}
begin
result := localtime64(t^);
end;
{$ifdef MSWINDOWS}
const
msvcrt = 'msvcrt.dll';
kernel = 'kernel32.dll';
function _beginthreadex(security: pointer; stksize: dword;
start,arg: pointer; flags: dword; var threadid: dword): THandle; cdecl; external msvcrt;
procedure _endthreadex(exitcode: dword); cdecl; external msvcrt;
{$ifdef CPU64}
// Delphi Win64 will link its own static sqlite3.o (diverse from FPC's)
function _log(x: double): double; export; // to link LLVM bcc64 compiler
begin
result := ln(x);
end;
function log(x: double): double; export; // to link old non-LLVM bcc64 compiler
begin
result := ln(x);
end;
procedure __chkstk;
begin
end;
procedure __faststorefence;
asm
.noframe
mfence;
end;
var
_finf: double = 1.0 / 0.0; // compiles to some double infinity constant
_fltused: Int64 = 0; // to link old non-LLVM bcc64 compiler
{$endif CPU64}
{$else MSWINDOWS}
{$ifdef KYLIX3}
function close(Handle: Integer): Integer; cdecl;
external libcmodulename;
function read(Handle: Integer; var Buffer; Count: size_t): ssize_t; cdecl;
external libcmodulename;
function write(Handle: Integer; const Buffer; Count: size_t): ssize_t; cdecl;
external libcmodulename;
function __fixunsdfdi(a: double): Int64; cdecl;
begin
if a<0 then
result := 0 else
result := round(a);
end;
{$endif KYLIX3}
{$endif MSWINDOWS}
{$endif FPC}
// some external functions as expected by codecext.c and our sqlite3mc.c wrapper
procedure CodecGenerateKey(var aes: TAES; userPassword: pointer; passwordLength: integer);
var s: TSynSigner;
k: THash512Rec;
begin
s.PBKDF2(userPassword,passwordLength,k,'J6CuDftfPr22FnYn');
s.AssignTo(k,aes,{encrypt=}true);
end;
function CodecGetReadKey(codec: pointer): PAES; cdecl; external;
function CodecGetWriteKey(codec: pointer): PAES; cdecl; external;
procedure CodecGenerateReadKey(codec: pointer;
userPassword: PAnsiChar; passwordLength: integer); cdecl;
{$ifdef FPC}public name _PREFIX+'CodecGenerateReadKey';{$endif} export;
begin
CodecGenerateKey(CodecGetReadKey(codec)^,userPassword,passwordLength);
end;
procedure CodecGenerateWriteKey(codec: pointer;
userPassword: PAnsiChar; passwordLength: integer); cdecl;
{$ifdef FPC}public name _PREFIX+'CodecGenerateWriteKey';{$endif} export;
begin
CodecGenerateKey(CodecGetWriteKey(codec)^,userPassword,passwordLength);
end;
procedure CodecAESProcess(page: cardinal; data: PAnsiChar; len: integer;
aes: PAES; encrypt: boolean);
var plain: Int64; // bytes 16..23 should always be unencrypted
iv: THash128Rec; // is genuine and AES-protected (since not random)
begin
if (len and AESBlockMod<>0) or (len<=0) or (integer(page)<=0) then
raise ESQLite3Exception.CreateUTF8('CodecAESProcess(page=%,len=%)', [page,len]);
iv.c0 := page xor 668265263; // prime-based initialization
iv.c1 := page*2654435761;
iv.c2 := page*2246822519;
iv.c3 := page*3266489917;
if not ForceSQLite3LegacyAES then
aes^.Encrypt(iv.b); // avoid potential brute force attack
len := len shr AESBlockShift;
if page=1 then // ensure header bytes 16..23 are stored unencrypted
if (PInt64(data)^=SQLITE_FILE_HEADER128.lo) and
(data[21]=#64) and (data[22]=#32) and (data[23]=#32) then
if encrypt then begin
plain := PInt64(data+16)^;
aes^.DoBlocksOFB(iv.b,data+16,data+16,len-1);
PInt64(data+8)^ := PInt64(data+16)^; // 8..15 are encrypted bytes 16..23
PInt64(data+16)^ := plain;
end else begin
PInt64(data+16)^ := PInt64(data+8)^;
aes^.DoBlocksOFB(iv.b,data+16,data+16,len-1);
if (data[21]=#64) and (data[22]=#32) and (data[23]=#32) then
PHash128(data)^ := SQLITE_FILE_HEADER128.b else
FillZero(PHash128(data)^); // report incorrect password
end else
FillZero(PHash128(data)^) else
aes^.DoBlocksOFB(iv.b,data,data,len);
end;
function CodecEncrypt(codec: pointer; page: integer; data: PAnsiChar;
len, useWriteKey: integer): integer; cdecl;
{$ifdef FPC}public name _PREFIX+'CodecEncrypt';{$endif} export;
begin
if useWriteKey=1 then
CodecAESProcess(page,data,len,CodecGetWriteKey(codec),true) else
CodecAESProcess(page,data,len,CodecGetReadKey(codec),true);
result := SQLITE_OK;
end;
function CodecDecrypt(codec: pointer; page: integer;
data: PAnsiChar; len: integer): integer; cdecl;
{$ifdef FPC}public name _PREFIX+'CodecDecrypt';{$endif} export;
begin
CodecAESProcess(page,data,len,CodecGetReadKey(codec),false);
result := SQLITE_OK;
end;
function CodecTerm(codec: pointer): integer; cdecl;
{$ifdef FPC}public name _PREFIX+'CodecTerm';{$endif} export;
begin
CodecGetReadKey(codec)^.Done;
CodecGetWriteKey(codec)^.Done;
result := SQLITE_OK;
end;
function ChangeSQLEncryptTablePassWord(const FileName: TFileName;
const OldPassWord, NewPassword: RawUTF8): boolean;
var F: THandle;
bufsize,page,pagesize,pagecount,n,p,read: cardinal;
head: THash256Rec;
buf: PAnsiChar;
temp: RawByteString;
size: TQWordRec;
posi: Int64;
old, new: TAES;
begin
result := false;
if OldPassword=NewPassword then
exit;
F := FileOpen(FileName,fmOpenReadWrite);
if F<>INVALID_HANDLE_VALUE then
try
if OldPassword<>'' then
CodecGenerateKey(old,pointer(OldPassword),length(OldPassWord));
if NewPassword<>'' then
CodecGenerateKey(new,pointer(NewPassword),length(NewPassWord));
size.L := GetFileSize(F,@size.H);
read := FileRead(F,head,SizeOf(head));
if read<>SizeOf(head) then
exit;
if size.V>4 shl 20 then // use up to 4MB of R/W buffer
bufsize := 4 shl 20 else
bufsize := size.L;
pagesize := cardinal(head.b[16]) shl 8+head.b[17];
pagecount := size.V div pagesize;
if (pagesize<1024) or (pagesize and AESBlockMod<>0) or (pagesize>bufsize) or
(QWord(pagecount)*pagesize<>size.V) or (head.d0<>SQLITE_FILE_HEADER128.Lo) or
((head.d1=SQLITE_FILE_HEADER128.Hi)<>(OldPassWord='')) then
exit;
FileSeek64(F,0,soFromBeginning);
SetLength(temp,bufsize);
posi := 0;
page := 1;
while page<=pagecount do begin
n := bufsize div pagesize;
read := pagecount-page+1;
if read < n then
n := read;
buf := pointer(temp);
read := FileRead(F,buf^,pagesize*n);
if read<>pagesize*n then
exit; // stop on any read error
for p := 0 to n-1 do begin
if OldPassword<>'' then begin
CodecAESProcess(page+p,buf,pagesize,@old,false);
if (p=0) and (page=1) and (PInteger(buf)^=0) then
exit; // OldPassword is obviously incorrect
end;
if NewPassword<>'' then
CodecAESProcess(page+p,buf,pagesize,@new,true);
inc(buf,pagesize);
end;
FileSeek64(F,posi,soFromBeginning);
FileWrite(F,pointer(temp)^,pagesize*n); // update in-place
inc(posi,pagesize*n);
inc(page,n);
end;
result := true;
finally
FileClose(F);
if OldPassword<>'' then
old.Done;
if NewPassword<>'' then
new.Done;
end;
end;
function IsOldSQLEncryptTable(const FileName: TFileName): boolean;
var F: THandle;
Header: array[0..2047] of byte;
begin
result := false;
F := FileOpen(FileName,fmOpenRead or fmShareDenyNone);
if F=INVALID_HANDLE_VALUE then
exit;
if (FileRead(F,Header,SizeOf(Header))=SizeOf(Header)) and
// see https://www.sqlite.org/fileformat.html (4 in big endian = 1024 bytes)
(PWord(@Header[16])^=4) and
IsEqual(PHash128(@Header)^,SQLITE_FILE_HEADER128.b) then
if not(Header[1024] in [5,10,13]) then
// B-tree leaf Type to be either 5 (interior) 10 (index) or 13 (table)
result := true;
FileClose(F);
end;
procedure OldSQLEncryptTablePassWordToPlain(const FileName: TFileName;
const OldPassWord: RawUTF8);
const
SQLEncryptTableSize = $4000;
procedure CreateSQLEncryptTableBytes(const PassWord: RawUTF8; Table: PByteArray);
// very fast table (private key) computation from a given password
// - use a simple prime-based random generator, strong enough for common use
// - execution speed and code size was the goal here: can be easily broken
// - SynCrypto proposes SHA-256 and AES-256 for more secure encryption
var i, j, k, L: integer;
begin
L := length(Password)-1;
j := 0;
k := integer(L*ord(Password[1]))+134775813; // initial value, prime number derivated
for i := 0 to SQLEncryptTableSize-1 do begin
Table^[i] := (ord(PassWord[j+1])) xor byte(k);
k := Integer(k*3+i); // fast prime-based pseudo random generator
if j=L then
j := 0 else
inc(j);
end;
end;
procedure XorOffset(P: PByte; Index, Count: cardinal; SQLEncryptTable: PByteArray);
var Len: cardinal;
begin // fast and simple Cypher using Index (= offset in file)
if Count>0 then
repeat
Index := Index and (SQLEncryptTableSize-1);
Len := SQLEncryptTableSize-Index;
if Len>Count then
Len := Count;
XorMemory(pointer(P),@SQLEncryptTable^[Index],Len);
inc(P,Len);
inc(Index,Len);
dec(Count,Len);
until Count=0;
end;
var F: THandle;
R: integer;
Buf: array[word] of byte; // temp buffer for read/write (64KB is enough)
Size, Posi: TQWordRec;
OldP: array[0..SQLEncryptTableSize-1] of byte; // 2x16KB tables
begin
F := FileOpen(FileName,fmOpenReadWrite);
if F=INVALID_HANDLE_VALUE then
exit;
Size.L := GetFileSize(F,@Size.H);
if (Size.L<=1024) and (Size.H=0) then begin