Anno 1701 RDA

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*.rda

{{GRAFPageMisc{{ subst:#if: Archive | {{subst:!}}Archive }}{{ subst:#if: Little Endian | {{subst:!}}Little Endian }}}}

Format Specifications

//header
Char {26}    - header ("Crypted Resource File V1.1")
byte {230}   - reserved
uint32 {4}   - number of files
//dictionary
Char {256}   - filename
uint32 {4}   - file offset
uint32 {4}   - file size (compressed)
uint32 {4}   - file size (decompressed)
uint32 (4)   - compression flag (7:compressed)
uint32 {4}   - timestamp
//data
byte {x}     - files

Notes and Comments

Das Archiv enthält komprimierte(deflate) und unkomprimierte Daten,
Kopf und Verzeichnis sind einzeln verschlüsselt. Hier der Algorithmus:
(anzahl ist die Größe des Blocks durch 2, also für den Kopf = 130)
English: The archive contains compressed(deflate) and uncompressed data,
header and dictionary are separately encrypted. Here is the algorithm:
(anzahl is the size of the block divided by 2, for the head = 130)

mov ebx, puffer
mov ecx,0
mov x,0xA2C2A
start:
mov eax,x
imul eax,eax,0x343FD
add eax,0x269EC3
mov x,eax
shr eax,0x10
and eax,0x7FFF
mov ebx, ecx
shl ebx, 1
add ebx, puffer
xor word ptr [ebx], ax
inc ecx
cmp ecx, anzahl
jb start

MultiEx BMS Script

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Anno 1701