997 lines
16 KiB
PHP
997 lines
16 KiB
PHP
; @RCHER parser and filter routines
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; Written in pure assembler by Ivushkin Andrey aka Willow
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fhs_local equ 0x04034b50
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fhs_central equ 0x02014b50
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fhs_end equ 0x06054b50
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fhs_enc equ 0x08074b50
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SkipASCIIZ:
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xor eax,eax
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mov ecx,255
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mov edi,esi
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repne scasb
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mov esi,edi
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ret
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PrintFilename:
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pusha
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mov esi,edx
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mov edi,os_work
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mov edx,edi
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rep movsb
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mov dword[edi],0x00a0d
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call DebugPrint
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popa
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call Add2Fat
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ret
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Add2Fat:
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; edx - ptr, ecx - len
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pusha
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test [Flags],LIST_MODE
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jz .ex
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mov ebp,8
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mov edi,edx
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lea ebx,[edx+ecx]
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mov ecx,[lpath_len]
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cmp ecx,1
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je .lbl
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mov esi,[lpath]
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repe cmpsb
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jne .full
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mov eax,[lpath_len]
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sub dword[esp+24],eax;path_len-path
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cmp edi,ebx
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je .full
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mov edx,edi
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.lbl:
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mov ecx,[esp+24]
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mov al,'/'
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repne scasb
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mov eax,[fat_]
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mov ecx,[esp+24]
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jne .nofol
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cmp edi,ebx
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jne .full
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lea ecx,[edi-1]
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sub ecx,edx
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or byte[eax+11],0x10
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; sub edx,ecx
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.nofol:
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push [fat_fnum]
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pop dword[eax+12]
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mov edi,eax
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mov esi,edx
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.lp1:
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mov bl,[esi]
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lea edx,[eax+ebp]
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inc esi
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cmp bl,'.'
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jne .nodot
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lea edi,[eax+ebp]
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mov ebp,11
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jmp .ll
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.nodot:
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cmp edi,edx
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jae .ll
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mov [edi],bl
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inc edi
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.ll:
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loop .lp1
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mov ecx,11
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dec eax
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.lp2:
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cmp byte[eax+ecx],0
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jne .no0
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mov byte[eax+ecx],' '
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.no0:
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loop .lp2
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cmp eax,child_stack-1
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jae .full
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add [fat_],32
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.full:
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inc [fat_fnum]
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.ex:
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popa
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ret
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;path db '/';'fasm/examples/elfexe/'
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;path_len:
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; Parse routines:
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; out: edx= 0 if all ok, 1 - central dir, 2-EOD
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; 50 - encrypted
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; 51 - not deflated
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; 52 - invalid format
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; 53 - dir skipped
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; 1 - encrypted
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; ****************************************************
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ZipParse:
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call ResetFile
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.nxt:
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call ZipCrawl
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cmp edx,3
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je .ex
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cmp edx,1
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je .skipinc
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if IGNORE_DIRS eq 1
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cmp edx,53
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jne .skipinc
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end if
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inc [file_count]
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.skipinc:
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cmp edx,52
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je .er1
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cmp edx,50
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jne .seek
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.er1:
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Msg edx
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ret
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.seek:
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add eax,ecx
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mov ebx,1
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call FileSeek
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jmp .nxt
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.ex:
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Msg 2
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mov eax,[file_count]
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if ~ SYS eq win
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dpd eax
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else
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pusha
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call int2str
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mov edx,os_work
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call DebugPrint
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popa
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end if
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Newline
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; Dump fat,160,os_work
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ret
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ZipFindN:
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; ecx - file #
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Msg 33
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or [Flags],FIND_MODE
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cmp ecx,[file_count]
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jae .err
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push ecx
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call ResetFile
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.nxt:
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call ZipCrawl
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cmp edx,51
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je .ok2
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.noenc:
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test edx,edx
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jnz .err
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.ok2:
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add eax,ecx
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cmp dword[esp],0
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jz .ok
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dec dword[esp]
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mov ebx,1
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call FileSeek
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jmp .nxt
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.err:
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mov edx,4
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jmp .ex
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.ok:
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pop ecx
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sub eax,[esi+18]
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add esi,eax
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mov edx,5
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.ex:
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and [Flags],-1-FIND_MODE
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push edx
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Msg edx
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pop edx
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ret
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ZipCrawl:
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mov edx,52
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cmp dword[esi],fhs_central
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jne .noc
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mov eax,46
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movzx ecx,word[esi+28]
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add eax,ecx
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movzx ecx,word[esi+30]
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add eax,ecx
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movzx ecx,word[esi+32]
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mov edx,1
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ret
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.noc:
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cmp dword[esi],fhs_end
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jne .noe
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.edx3:
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Msg 3
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mov edx,3
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ret
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.noe:
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cmp dword[esi],fhs_local
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je .loc
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cmp dword[esi],fhs_enc
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jne .err
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mov eax,16
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xor ecx,ecx
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mov edx,1
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ret
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.loc:
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push word[esi+6]
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pop [gpbf]
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push dword[esi+14]
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pop [CRC_check]
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push dword[esi+22]
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pop [unp_size]
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movzx ecx,word[esi+26]
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mov eax,30
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lea edx,[esi+eax]
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add eax,ecx
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if IGNORE_DIRS eq 1
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cmp byte[edx+ecx-1],'/'
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je .skipdp
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end if
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test [Flags],FIND_MODE
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jnz .skipdp
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call PrintFilename
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.skipdp:
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movzx ecx,word[esi+28]
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add eax,[esi+18]
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test [gpbf],1
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jz .no_enc
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or [Flags],DECRYPT_MODE ; encrypted
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mov edx,51
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jmp .err
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.no_enc:
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test word[esi+8],7
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rep_err z,50
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.ok:
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xor edx,edx
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.err:
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ret
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; ***********************************************
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GzipParse:
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ID1ID2 equ 0x8b1f
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FTEXT equ 1b
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FHCRC equ 10b
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FEXTRA equ 100b
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FNAME equ 1000b
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FCOMMENT equ 10000b
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mov eax,7
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mov ebx,2
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call FileSeek
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push dword[esi]
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pop [CRC_check]
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push dword[esi+4]
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pop [unp_size]
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call ResetFile
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xor edx,edx
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cmp word[esi],ID1ID2
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rep_err e, 52, 15
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cmp byte[esi+2],8
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rep_err e, 52, 50
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mov bl,[esi+3] ; bl - FLG
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add esi,10 ; esi->extra
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test bl,FEXTRA
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jz .noextr
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movzx eax,word[esi]
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lea esi,[esi+eax+2] ; esi->FNAME
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.noextr:
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test bl,FNAME
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jz .nofname
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mov edx,esi
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call DebugPrint
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call SkipASCIIZ
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cmp dword[esi-5],'.tar'
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jne .nofname
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or [Flags],TAR_MODE
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.nofname: ; esi->FCOMMENT
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test bl,FCOMMENT
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jz .nocomm
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call SkipASCIIZ
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.nocomm: ; esi->HCRC
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test bl,FHCRC
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jz .noCRC16
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add esi,2
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.noCRC16:
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cmp [unp_size],OUTBUF
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jb .sizeok2
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Msg 16
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mov edx,15
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ret
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.sizeok2:
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xor edx,edx
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.err:
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ret
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PngParse:
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ID1 equ 0x474e5089
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ID2 equ 0x0a1a0a0d
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FDICT equ 100000b
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InitIDAT equ 2
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mov [IDATcount],InitIDAT
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call ResetFile
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cmp dword[esi],ID1
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rep_err e, 52, 18
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cmp dword[esi+4],ID2
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rep_err e, 52, 18
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add esi,8
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cmp dword[esi+4],'IHDR'
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rep_err e,52, 18
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memcpy_esi PNG_info,13,8
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mov eax,[PNG_info.Width]
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bswap eax
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mov [PNG_info.Width],eax
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mov eax,[PNG_info.Height]
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bswap eax
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mov ebx,eax
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mov [PNG_info.Height],eax
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call scanline_calc
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; dps 'All='
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cmp [PNG_info.Color_type],3
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jne .nopal
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shl eax,3
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inc eax
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.nopal:
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inc eax
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imul eax,ebx
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mov [unp_size],eax
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; dpd eax
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add esi,25
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cmp byte[esi-5],0
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rep_err e,52,29
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or [Flags],PNG_MODE
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.nxt_sec:
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lodsd
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bswap eax ; eax - section size
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push eax
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lodsd
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mov edi,Png_ch
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mov ecx,(E_ch-Png_ch) / 4
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repne scasd
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pop eax
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mov ebx,[esi-4]
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mov edx,os_work
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mov [edx],ebx
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mov dword[edx+4],0x0a0d
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.dp:
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sub edi,Png_ch
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shr edi,2 ; edi- chunk #
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if SHOW_PNG_SEC eq 1
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call DebugPrint
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end if
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cmp edi,1
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jne .noend
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mov edx,21
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jmp .err
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.noend:
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cmp edi,2
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jne .noplte
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memcpy_esi PNG_info.Palette,eax
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jmp .noidat
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.noplte:
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cmp edi,3
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jne .noidat
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mov [IDATsize],eax
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cmp [IDATcount],InitIDAT
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jne .ex
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mov [bits],8
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if RBLOCK eq 4
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lodsd
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else
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lodsb
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end if
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call setcurb
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rbits 0,16
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test ah,FDICT
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jz .ex
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rbits 0,32
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add [IDATcount],4
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jmp .ex
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.noidat:
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add eax,4
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mov ebx,1
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call FileSeek
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jmp .nxt_sec
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.ex:
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xor edx,edx
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.err:
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ret
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Png_ch:
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dd 'IEND','PLTE','IDAT','????'
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E_ch:
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ZipDecrypt:
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push edi
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mov ecx,3
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mov edi,Dheader
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rep movsd
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pop edi
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call QueryPwd
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jecxz .ex
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push esi
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mov [DKeys], 305419896
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mov [DKeys+4],591751049
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mov [DKeys+8],878082192
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xor eax,eax
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mov esi,Dpassword
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.enc_init:
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lodsb
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call UKeys
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loop .enc_init
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mov ecx,12
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mov esi,Dheader
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.dec_header:
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call decrypt_byte
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xor al,[esi]
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call UKeys
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mov [esi],al
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inc esi
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loop .dec_header
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mov eax,[CRC_check]
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pop esi
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.ex:
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ret
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QueryPwd:
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; out: ecx - passwd len
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if SYS eq win
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Msg 32
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invoke ReadConsole,[cons_in],Dpassword,PASSW_LEN,cparam1,NULL
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test eax,eax
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jnz .inp_ok
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xor ecx,ecx
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jmp .ex
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.inp_ok:
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mov ecx,[cparam1]
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cmp ecx,PASSW_LEN
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je .ex
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sub ecx,2
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else
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end if
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.ex:
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ret
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UKeys:
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; in: al - char
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pusha
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mov edi,134775813
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mov ebx,DKeys
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mov esi,os_work
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mov byte[esi],al
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mov ecx,1
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push dword[ebx]
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pop [CRC32]
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call UCRC
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push [CRC32]
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pop dword[ebx]
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mov eax,[ebx]
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and eax,0xff
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add eax,[ebx+4]
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mul edi
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inc eax
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mov [ebx+4],eax
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shr eax,24
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mov byte[esi],al
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push dword[ebx+8]
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pop [CRC32]
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call UCRC
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push [CRC32]
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pop dword[ebx+8]
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popa
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ret
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decrypt_byte:
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; out: al
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push ebx edx
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movzx ebx,word[DKeys+8]
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or ebx,2
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mov eax,ebx
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xor eax,1
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mul ebx
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shr eax,8
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pop edx ebx
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ret
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setcurb:
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; in: eax
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test [Flags],DECRYPT_MODE
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jz .noenc
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push eax
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call decrypt_byte
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xor al,byte[esp]
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add esp,4
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call UKeys
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.noenc:
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mov [cur_byte],eax
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ret
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TarParse:
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mov esi,output
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; call ResetFile
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.nxt:
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call TarCrawl
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; wait
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cmp edx,3
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je ZipParse.ex
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if IGNORE_DIRS eq 1
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cmp edx,53
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jne .skipinc
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end if
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inc [file_count]
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.skipinc:
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add eax,ecx
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; mov ebx,1
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add esi,eax
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; call FileSeek
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jmp .nxt
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TarFindN:
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; in: ecx - file number
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; ecx - file #
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Msg 33
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cmp ecx,[file_count]
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jae .err
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push ecx
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mov esi,output
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; call ResetFile
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.nxt:
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call TarCrawl
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if IGNORE_DIRS eq 1
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cmp edx,53
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je .seek
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end if
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test edx,edx
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jnz .err
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cmp dword[esp],0
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jz .ok
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dec dword[esp]
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.seek:
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add eax,ecx
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; mov ebx,1
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add esi,eax
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; call FileSeek
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jmp .nxt
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.err:
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mov edx,4
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jmp .ex
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.ok:
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pop ecx
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add esi,eax
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mov edx,5
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.ex:
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Msg edx
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ret
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TarCrawl:
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cmp byte[esi],0
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jz ZipCrawl.edx3
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push esi
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mov ecx,11
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add esi,0x7c
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call Octal_str
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mov esi,[esp]
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mov [outfile.size],eax
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call SkipASCIIZ
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if IGNORE_DIRS eq 1
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cmp byte[esi-2],'/'
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je .skipdp
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end if
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mov edx,[esp]
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lea ecx,[esi-1]
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sub ecx,edx
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call PrintFilename
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.skipdp:
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mov ecx,[outfile.size]
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jecxz .zerolen
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shr ecx,9
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inc ecx
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shl ecx,9
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.zerolen:
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mov eax,512
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pop esi
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jmp ZipCrawl.ok
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Octal_str:
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; in: esi - ASCIIZ octal string
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; ecx - its length
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; out: eax - value
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push esi ebx ecx
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xor ebx,ebx
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xor eax,eax
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.jec:
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jecxz .zero
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cmp byte[esi+ecx-1],' '
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jne .lp
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dec ecx
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jmp .jec
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.lp:
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lodsb
|
|
shl ebx,3
|
|
cmp eax,' '
|
|
je .space
|
|
lea ebx,[ebx+eax-'0']
|
|
.space:
|
|
loop .lp
|
|
mov eax,ebx
|
|
.zero:
|
|
pop ecx ebx esi
|
|
ret
|
|
|
|
TRAILING_BUF equ 2048
|
|
SfxParse:
|
|
call ResetFile
|
|
cmp word[esi],'MZ'
|
|
rep_err e, 34
|
|
mov eax,TRAILING_BUF
|
|
mov ecx,eax
|
|
mov ebx,2
|
|
call FileSeek
|
|
mov edi,esi
|
|
mov al,'P'
|
|
.lp:
|
|
repne scasb
|
|
cmp dword[edi-1],fhs_end
|
|
je .end_found
|
|
jecxz .err
|
|
jmp .lp
|
|
.end_found:
|
|
dec edi
|
|
mov esi,edi
|
|
mov eax,[edi+12]
|
|
neg eax
|
|
mov ebx,1
|
|
call FileSeek
|
|
push dword[esi+42]
|
|
pop [arc_base]
|
|
.err:
|
|
ret
|
|
|
|
scanline_calc:
|
|
movzx ecx,byte[PNG_info.Color_type]
|
|
mov eax,1
|
|
cmp cl,3
|
|
je .palette
|
|
test cl,2
|
|
jz .notriple
|
|
add eax,2
|
|
.notriple:
|
|
test cl,4
|
|
jz .calc_bpp
|
|
inc eax
|
|
.calc_bpp:
|
|
mul [PNG_info.Bit_depth]
|
|
.palette:
|
|
mov ecx,eax ; in bits
|
|
shr eax,3 ; in bytes
|
|
test eax,eax
|
|
jnz .noz
|
|
inc eax
|
|
.noz:
|
|
mov [png_bpp],eax
|
|
mov eax,[PNG_info.Width]
|
|
mov ebp,eax
|
|
imul ecx
|
|
shr eax,3
|
|
test eax,eax
|
|
jnz .noz2
|
|
inc eax
|
|
.noz2:
|
|
ret
|
|
|
|
; Created: May 31, 2005
|
|
FiltCall:
|
|
dd PngFilter.nofilt,Filt_sub,Filt_up,Filt_av,Filt_paeth,PngFilter.nofilt
|
|
PngFilter:
|
|
; esi - filtered uncompressed image data
|
|
; edi - destination
|
|
call scanline_calc
|
|
mov [sline_len],eax ; scanline length
|
|
push edi
|
|
and [Flags],not 1
|
|
mov ecx,[PNG_info.Height]
|
|
.scanline:
|
|
; Msg 9,1
|
|
push ecx
|
|
lodsb
|
|
movzx eax,al
|
|
cmp eax,5
|
|
jb .f_ok
|
|
mov eax,5
|
|
.f_ok:
|
|
inc dword[filters+eax*4]
|
|
jmp dword[FiltCall+eax*4]
|
|
.nofilt:
|
|
mov dl,[PNG_info.Color_type]
|
|
cmp dl,3
|
|
jne .nopalette
|
|
lodsb
|
|
mov [cur_byte],eax
|
|
mov [bits],8
|
|
mov ecx,ebp
|
|
.pixel:
|
|
push ecx
|
|
movzx ecx,[PNG_info.Bit_depth]
|
|
call rb_png
|
|
push esi
|
|
lea esi,[eax+eax*2]
|
|
add esi,PNG_info.Palette
|
|
call PngStore
|
|
pop esi
|
|
pop ecx
|
|
loop .pixel
|
|
cmp [bits],8
|
|
jne .lp
|
|
dec esi
|
|
.lp:
|
|
pop ecx
|
|
loop .sl
|
|
jmp .sl2
|
|
.sl:
|
|
;//
|
|
MV equ 1
|
|
; mov eax,ecx
|
|
; and eax,1 shl MOVE_SLINE_LEV-1
|
|
; jnz .scanline
|
|
;stop
|
|
if MV eq 0
|
|
push ecx
|
|
mov ecx,edi
|
|
sub ecx,esi
|
|
sub [outp],esi
|
|
mov edi,output
|
|
add [outp],edi
|
|
rep movsb
|
|
mov esi,output
|
|
pop ecx
|
|
pop eax
|
|
push [outp]
|
|
end if
|
|
;;//
|
|
jmp .scanline
|
|
.sl2:
|
|
;//
|
|
; call MoveScanline
|
|
sub edi,[outp]
|
|
;//
|
|
; sub edi,[esp]
|
|
pop eax
|
|
ret
|
|
|
|
.nopalette:
|
|
test dl,2
|
|
jz .notriple1
|
|
.__:
|
|
mov ecx,[PNG_info.Width]
|
|
.RGBcp:
|
|
call PngStore
|
|
add esi,[png_bpp]
|
|
loop .RGBcp
|
|
jmp .lp
|
|
.notriple1:
|
|
test dl,dl
|
|
jz .gray
|
|
cmp dl,4
|
|
jne .__
|
|
; Msg 31
|
|
; ud2
|
|
.gray:
|
|
; stop
|
|
push ecx
|
|
mov ecx,[PNG_info.Width]
|
|
mov [bits],8
|
|
lodsb
|
|
mov [cur_byte],eax
|
|
.gray2:
|
|
push ecx
|
|
movzx ecx,[PNG_info.Bit_depth]
|
|
push ecx
|
|
call rb_png
|
|
pop ecx
|
|
cmp ecx,8
|
|
jbe .lo
|
|
add esi,2
|
|
shr eax,8
|
|
jmp .stsb
|
|
.lo:
|
|
neg ecx
|
|
add ecx,8
|
|
shl eax,cl
|
|
.stsb:
|
|
mov ecx,3
|
|
rep stosb
|
|
pop ecx
|
|
loop .gray2
|
|
dec esi
|
|
pop ecx
|
|
jmp .lp
|
|
|
|
Filt_sub:
|
|
; dps '-'
|
|
mov ecx,[sline_len]
|
|
sub ecx,[png_bpp]
|
|
push esi edi
|
|
mov edi,esi
|
|
add edi,[png_bpp]
|
|
.scan: ; esi - previous, edi - current
|
|
lodsb
|
|
add [edi],al
|
|
inc edi
|
|
loop .scan
|
|
|
|
pop edi esi
|
|
; dps '-'
|
|
jmp PngFilter.nofilt
|
|
|
|
Filt_up:
|
|
cmp ecx,[PNG_info.Height]
|
|
je PngFilter.nofilt
|
|
push esi edi
|
|
mov ecx,[sline_len]
|
|
mov edi,esi
|
|
sub esi,ecx
|
|
dec esi
|
|
jmp Filt_sub.scan
|
|
|
|
Filt_av:
|
|
pusha
|
|
mov ecx,[sline_len]
|
|
mov ebp,[PNG_info.Height]
|
|
mov edx,[png_bpp] ; edx-raw
|
|
neg edx
|
|
mov ebx,ecx
|
|
sub ebx,[png_bpp]
|
|
mov edi,esi
|
|
sub esi,ecx
|
|
dec esi ; esi-prior
|
|
.lpavg:
|
|
xor eax,eax
|
|
cmp [esp+24h],ebp
|
|
je .1stl
|
|
movzx eax,byte[esi]
|
|
.1stl:
|
|
cmp ecx,ebx
|
|
ja .leftbad
|
|
push ecx
|
|
movzx ecx,byte[edi+edx]
|
|
add eax,ecx
|
|
pop ecx
|
|
.leftbad:
|
|
shr eax,1
|
|
add [edi],al
|
|
inc esi
|
|
inc edi
|
|
loop .lpavg
|
|
popa
|
|
jmp PngFilter.nofilt
|
|
|
|
Filt_paeth:
|
|
pusha
|
|
mov ecx,[sline_len]
|
|
mov edx,[png_bpp]
|
|
neg edx
|
|
lea ebp,[ecx+edx] ; left edge
|
|
mov edi,esi
|
|
sub esi,ecx
|
|
dec esi
|
|
.lpaeth:
|
|
push ecx
|
|
movzx eax,byte[edi+edx]
|
|
movzx ebx,byte[esi]
|
|
movzx ecx,byte[esi+edx]
|
|
push eax
|
|
mov eax,[esp+28h]
|
|
cmp eax,[PNG_info.Height] ; 1st line
|
|
jne .no1stlineok
|
|
xor ebx,ebx
|
|
xor ecx,ecx
|
|
.no1stlineok:
|
|
pop eax
|
|
cmp [esp],ebp ; ecx
|
|
jbe .leftok ; x-bpp>=0
|
|
xor eax,eax
|
|
xor ecx,ecx
|
|
.leftok:
|
|
pusha ; eax-28, ebx-16, ecx-24
|
|
lea edx,[eax+ebx]
|
|
sub edx,ecx ; p=edx
|
|
sub eax,edx ; pa := abs(p - a)
|
|
jge .eaxp
|
|
neg eax
|
|
.eaxp:
|
|
sub ebx,edx ; pb := abs(p - b)
|
|
jge .ebxp
|
|
neg ebx
|
|
.ebxp:
|
|
sub ecx,edx ; pc := abs(p - c)
|
|
jge .ecxp
|
|
neg ecx
|
|
.ecxp:
|
|
cmp eax,ebx
|
|
ja .noa
|
|
cmp eax,ecx
|
|
jbe .ex ; pa-min
|
|
.noa:
|
|
cmp ebx,ecx
|
|
ja .nob
|
|
mov eax,[esp+16]
|
|
jmp .ex2
|
|
.nob:
|
|
mov eax,[esp+24]
|
|
.ex2:
|
|
mov [esp+28],eax
|
|
.ex:
|
|
popa
|
|
add [edi],al
|
|
inc esi
|
|
inc edi
|
|
pop ecx
|
|
loop .lpaeth
|
|
popa
|
|
jmp PngFilter.nofilt
|
|
|
|
rb_png: ; eax-dest; ecx-count
|
|
push ecx
|
|
xor eax,eax
|
|
.shift:
|
|
rol byte[cur_byte],1
|
|
rcl eax,1
|
|
.dec:
|
|
dec [bits]
|
|
jnz .loop1
|
|
.push:
|
|
push dword[esi]
|
|
pop [cur_byte]
|
|
mov [bits],8
|
|
inc esi
|
|
.loop1:
|
|
loop .shift
|
|
pop ecx
|
|
ret
|
|
|
|
PngStore:
|
|
push esi
|
|
cmp [PNG_info.Bit_depth],8
|
|
jbe .lo
|
|
add esi,3
|
|
.lo:
|
|
if ~ SYS eq win
|
|
mov esi,[esi]
|
|
bswap esi
|
|
shr esi,8
|
|
mov [edi],esi
|
|
add edi,3
|
|
else
|
|
movsw
|
|
movsb
|
|
end if
|
|
pop esi
|
|
ret
|
|
|
|
FiltStats:
|
|
pusha
|
|
xor ebx,ebx
|
|
mov edx,23
|
|
mov ecx,6
|
|
.lp:
|
|
push ecx edx
|
|
Msg edx
|
|
mov eax,[filters+ebx*4]
|
|
DebugPrintDec
|
|
pop edx ecx
|
|
inc edx
|
|
inc ebx
|
|
loop .lp
|
|
Newline
|
|
popa
|
|
ret
|
|
|