?? dcpmars.pas
字號:
m:= blk[0] + KeyData[28];
r:= LRot32(blk[0],13) * KeyData[29];
l:= s_box[m and $1FF]; r:= LRot32(r,5);
t:= r and $1f; m:= LRot32(m,t);
l:= l xor r; r:= LRot32(r,5); l:= l xor r;
t:= r and $1f; l:= LRot32(l,t);
blk[0]:= LRot32(blk[0],13);
blk[3]:= blk[3] + l;
blk[2]:= blk[2] + m;
blk[1]:= blk[1] xor r;
m:= blk[1] + KeyData[30];
r:= LRot32(blk[1],13) * KeyData[31];
l:= s_box[m and $1FF]; r:= LRot32(r,5);
t:= r and $1f; m:= LRot32(m,t);
l:= l xor r; r:= LRot32(r,5); l:= l xor r;
t:= r and $1f; l:= LRot32(l,t);
blk[1]:= LRot32(blk[1],13);
blk[0]:= blk[0] + l;
blk[3]:= blk[3] + m;
blk[2]:= blk[2] xor r;
m:= blk[2] + KeyData[32];
r:= LRot32(blk[2],13) * KeyData[33];
l:= s_box[m and $1FF]; r:= LRot32(r,5);
t:= r and $1f; m:= LRot32(m,t);
l:= l xor r; r:= LRot32(r,5); l:= l xor r;
t:= r and $1f; l:= LRot32(l,t);
blk[2]:= LRot32(blk[2],13);
blk[1]:= blk[1] + l;
blk[0]:= blk[0] + m;
blk[3]:= blk[3] xor r;
m:= blk[3] + KeyData[34];
r:= LRot32(blk[3],13) * KeyData[35];
l:= s_box[m and $1FF]; r:= LRot32(r,5);
t:= r and $1f; m:= LRot32(m,t);
l:= l xor r; r:= LRot32(r,5); l:= l xor r;
t:= r and $1f; l:= LRot32(l,t);
blk[3]:= LRot32(blk[3],13);
blk[2]:= blk[2] + l;
blk[1]:= blk[1] + m;
blk[0]:= blk[0] xor r;
blk[1]:= blk[1] xor s_box[ (blk[0] and $FF) + 256];
blk[2]:= blk[2] - s_box[ (blk[0] shr 24) and $FF];
blk[3]:= blk[3] - s_box[((blk[0] shr 16) and $FF) + 256];
blk[3]:= blk[3] xor s_box[ (blk[0] shr 8) and $FF];
blk[0]:= LRot32(blk[0], 24);
blk[2]:= blk[2] xor s_box[ (blk[1] and $FF) + 256];
blk[3]:= blk[3] - s_box[ (blk[1] shr 24) and $FF];
blk[0]:= blk[0] - s_box[((blk[1] shr 16) and $FF) + 256];
blk[0]:= blk[0] xor s_box[ (blk[1] shr 8) and $FF];
blk[1]:= LRot32(blk[1], 24); blk[2]:= blk[2] - blk[1];
blk[3]:= blk[3] xor s_box[ (blk[2] and $FF) + 256];
blk[0]:= blk[0] - s_box[ (blk[2] shr 24) and $FF];
blk[1]:= blk[1] - s_box[((blk[2] shr 16) and $FF) + 256];
blk[1]:= blk[1] xor s_box[ (blk[2] shr 8) and $FF];
blk[2]:= LRot32(blk[2], 24); blk[3]:= blk[3] - blk[0];
blk[0]:= blk[0] xor s_box[ (blk[3] and $FF) + 256];
blk[1]:= blk[1] - s_box[ (blk[3] shr 24) and $FF];
blk[2]:= blk[2] - s_box[((blk[3] shr 16) and $FF) + 256];
blk[2]:= blk[2] xor s_box[ (blk[3] shr 8) and $FF];
blk[3]:= LRot32(blk[3], 24);
blk[1]:= blk[1] xor s_box[ (blk[0] and $FF) + 256];
blk[2]:= blk[2] - s_box[ (blk[0] shr 24) and $FF];
blk[3]:= blk[3] - s_box[((blk[0] shr 16) and $FF) + 256];
blk[3]:= blk[3] xor s_box[ (blk[0] shr 8) and $FF];
blk[0]:= LRot32(blk[0], 24);
blk[2]:= blk[2] xor s_box[ (blk[1] and $FF) + 256];
blk[3]:= blk[3] - s_box[ (blk[1] shr 24) and $FF];
blk[0]:= blk[0] - s_box[((blk[1] shr 16) and $FF) + 256];
blk[0]:= blk[0] xor s_box[ (blk[1] shr 8) and $FF];
blk[1]:= LRot32(blk[1], 24); blk[2]:= blk[2] - blk[1];
blk[3]:= blk[3] xor s_box[ (blk[2] and $FF) + 256];
blk[0]:= blk[0] - s_box[ (blk[2] shr 24) and $FF];
blk[1]:= blk[1] - s_box[((blk[2] shr 16) and $FF) + 256];
blk[1]:= blk[1] xor s_box[ (blk[2] shr 8) and $FF];
blk[2]:= LRot32(blk[2], 24); blk[3]:= blk[3] - blk[0];
blk[0]:= blk[0] xor s_box[ (blk[3] and $FF) + 256];
blk[1]:= blk[1] - s_box[ (blk[3] shr 24) and $FF];
blk[2]:= blk[2] - s_box[((blk[3] shr 16) and $FF) + 256];
blk[2]:= blk[2] xor s_box[ (blk[3] shr 8) and $FF];
blk[3]:= LRot32(blk[3], 24);
blk[0]:= blk[0] - KeyData[36]; blk[1]:= blk[1] - KeyData[37];
blk[2]:= blk[2] - KeyData[38]; blk[3]:= blk[3] - KeyData[39];
PDWord(@OutData)^:= Blk[0];
PDWord(longword(@OutData)+4)^:= Blk[1];
PDWord(longword(@OutData)+8)^:= Blk[2];
PDWord(longword(@OutData)+12)^:= Blk[3];
end;
procedure TDCP_mars.DecryptECB(const InData; var OutData);
var
l, m, r, t: DWord;
blk: array[0..3] of DWord;
begin
if not fInitialized then
raise EDCP_blockcipher.Create('Cipher not initialized');
Blk[0]:= PDWord(@InData)^;
Blk[1]:= PDWord(longword(@InData)+4)^;
Blk[2]:= PDWord(longword(@InData)+8)^;
Blk[3]:= PDWord(longword(@InData)+12)^;
blk[0]:= blk[0] + KeyData[36]; blk[1]:= blk[1] + KeyData[37];
blk[2]:= blk[2] + KeyData[38]; blk[3]:= blk[3] + KeyData[39];
blk[3]:= RRot32(blk[3], 24);
blk[2]:= blk[2] xor s_box[ (blk[3] shr 8) and $FF];
blk[2]:= blk[2] + s_box[((blk[3] shr 16) and $FF) + 256];
blk[1]:= blk[1] + s_box[ (blk[3] shr 24) and $FF];
blk[0]:= blk[0] xor s_box[ (blk[3] and $FF) + 256];
blk[3]:= blk[3] + blk[0]; blk[2]:= RRot32(blk[2], 24);
blk[1]:= blk[1] xor s_box[ (blk[2] shr 8) and $FF];
blk[1]:= blk[1] + s_box[((blk[2] shr 16) and $FF) + 256];
blk[0]:= blk[0] + s_box[ (blk[2] shr 24) and $FF];
blk[3]:= blk[3] xor s_box[ (blk[2] and $FF) + 256];
blk[2]:= blk[2] + blk[1]; blk[1]:= RRot32(blk[1], 24);
blk[0]:= blk[0] xor s_box[ (blk[1] shr 8) and $FF];
blk[0]:= blk[0] + s_box[((blk[1] shr 16) and $FF) + 256];
blk[3]:= blk[3] + s_box[ (blk[1] shr 24) and $FF];
blk[2]:= blk[2] xor s_box[ (blk[1] and $FF) + 256];
blk[0]:= RRot32(blk[0], 24);
blk[3]:= blk[3] xor s_box[ (blk[0] shr 8) and $FF];
blk[3]:= blk[3] + s_box[((blk[0] shr 16) and $FF) + 256];
blk[2]:= blk[2] + s_box[ (blk[0] shr 24) and $FF];
blk[1]:= blk[1] xor s_box[ (blk[0] and $FF) + 256];
blk[3]:= RRot32(blk[3], 24);
blk[2]:= blk[2] xor s_box[ (blk[3] shr 8) and $FF];
blk[2]:= blk[2] + s_box[((blk[3] shr 16) and $FF) + 256];
blk[1]:= blk[1] + s_box[ (blk[3] shr 24) and $FF];
blk[0]:= blk[0] xor s_box[ (blk[3] and $FF) + 256];
blk[3]:= blk[3] + blk[0]; blk[2]:= RRot32(blk[2], 24);
blk[1]:= blk[1] xor s_box[ (blk[2] shr 8) and $FF];
blk[1]:= blk[1] + s_box[((blk[2] shr 16) and $FF) + 256];
blk[0]:= blk[0] + s_box[ (blk[2] shr 24) and $FF];
blk[3]:= blk[3] xor s_box[ (blk[2] and $FF) + 256];
blk[2]:= blk[2] + blk[1]; blk[1]:= RRot32(blk[1], 24);
blk[0]:= blk[0] xor s_box[ (blk[1] shr 8) and $FF];
blk[0]:= blk[0] + s_box[((blk[1] shr 16) and $FF) + 256];
blk[3]:= blk[3] + s_box[ (blk[1] shr 24) and $FF];
blk[2]:= blk[2] xor s_box[ (blk[1] and $FF) + 256];
blk[0]:= RRot32(blk[0], 24);
blk[3]:= blk[3] xor s_box[ (blk[0] shr 8) and $FF];
blk[3]:= blk[3] + s_box[((blk[0] shr 16) and $FF) + 256];
blk[2]:= blk[2] + s_box[ (blk[0] shr 24) and $FF];
blk[1]:= blk[1] xor s_box[ (blk[0] and $FF) + 256];
blk[3]:= RRot32(blk[3],13);
m:= blk[3] + KeyData[34];
r:= LRot32(blk[3],13) * KeyData[35];
l:= s_box[m and $1FF]; r:= LRot32(r,5);
t:= r and $1f; m:= LRot32(m,t);
l:= l xor r; r:= LRot32(r,5); l:= l xor r;
t:= r and $1f; l:= LRot32(l,t);
blk[2]:= blk[2] - l;
blk[1]:= blk[1] - m;
blk[0]:= blk[0] xor r;
blk[2]:= RRot32(blk[2],13);
m:= blk[2] + KeyData[32];
r:= LRot32(blk[2],13) * KeyData[33];
l:= s_box[m and $1FF]; r:= LRot32(r,5);
t:= r and $1f; m:= LRot32(m,t);
l:= l xor r; r:= LRot32(r,5); l:= l xor r;
t:= r and $1f; l:= LRot32(l,t);
blk[1]:= blk[1] - l;
blk[0]:= blk[0] - m;
blk[3]:= blk[3] xor r;
blk[1]:= RRot32(blk[1],13);
m:= blk[1] + KeyData[30];
r:= LRot32(blk[1],13) * KeyData[31];
l:= s_box[m and $1FF]; r:= LRot32(r,5);
t:= r and $1f; m:= LRot32(m,t);
l:= l xor r; r:= LRot32(r,5); l:= l xor r;
t:= r and $1f; l:= LRot32(l,t);
blk[0]:= blk[0] - l;
blk[3]:= blk[3] - m;
blk[2]:= blk[2] xor r;
blk[0]:= RRot32(blk[0],13);
m:= blk[0] + KeyData[28];
r:= LRot32(blk[0],13) * KeyData[29];
l:= s_box[m and $1FF]; r:= LRot32(r,5);
t:= r and $1f; m:= LRot32(m,t);
l:= l xor r; r:= LRot32(r,5); l:= l xor r;
t:= r and $1f; l:= LRot32(l,t);
blk[3]:= blk[3] - l;
blk[2]:= blk[2] - m;
blk[1]:= blk[1] xor r;
blk[3]:= RRot32(blk[3],13);
m:= blk[3] + KeyData[26];
r:= LRot32(blk[3],13) * KeyData[27];
l:= s_box[m and $1FF]; r:= LRot32(r,5);
t:= r and $1f; m:= LRot32(m,t);
l:= l xor r; r:= LRot32(r,5); l:= l xor r;
t:= r and $1f; l:= LRot32(l,t);
blk[2]:= blk[2] - l;
blk[1]:= blk[1] - m;
blk[0]:= blk[0] xor r;
blk[2]:= RRot32(blk[2],13);
m:= blk[2] + KeyData[24];
r:= LRot32(blk[2],13) * KeyData[25];
l:= s_box[m and $1FF]; r:= LRot32(r,5);
t:= r and $1f; m:= LRot32(m,t);
l:= l xor r; r:= LRot32(r,5); l:= l xor r;
t:= r and $1f; l:= LRot32(l,t);
blk[1]:= blk[1] - l;
blk[0]:= blk[0] - m;
blk[3]:= blk[3] xor r;
blk[1]:= RRot32(blk[1],13);
m:= blk[1] + KeyData[22];
r:= LRot32(blk[1],13) * KeyData[23];
l:= s_box[m and $1FF]; r:= LRot32(r,5);
t:= r and $1f; m:= LRot32(m,t);
l:= l xor r; r:= LRot32(r,5); l:= l xor r;
t:= r and $1f; l:= LRot32(l,t);
blk[0]:= blk[0] - l;
blk[3]:= blk[3] - m;
blk[2]:= blk[2] xor r;
blk[0]:= RRot32(blk[0],13);
m:= blk[0] + KeyData[20];
r:= LRot32(blk[0],13) * KeyData[21];
l:= s_box[m and $1FF]; r:= LRot32(r,5);
t:= r and $1f; m:= LRot32(m,t);
l:= l xor r; r:= LRot32(r,5); l:= l xor r;
t:= r and $1f; l:= LRot32(l,t);
blk[3]:= blk[3] - l;
blk[2]:= blk[2] - m;
blk[1]:= blk[1] xor r;
blk[3]:= RRot32(blk[3],13);
m:= blk[3] + KeyData[18];
r:= LRot32(blk[3],13) * KeyData[19];
l:= s_box[m and $1FF]; r:= LRot32(r,5);
t:= r and $1f; m:= LRot32(m,t);
l:= l xor r; r:= LRot32(r,5); l:= l xor r;
t:= r and $1f; l:= LRot32(l,t);
blk[0]:= blk[0] - l;
blk[1]:= blk[1] - m;
blk[2]:= blk[2] xor r;
blk[2]:= RRot32(blk[2],13);
m:= blk[2] + KeyData[16];
r:= LRot32(blk[2],13) * KeyData[17];
l:= s_box[m and $1FF]; r:= LRot32(r,5);
t:= r and $1f; m:= LRot32(m,t);
l:= l xor r; r:= LRot32(r,5); l:= l xor r;
t:= r and $1f; l:= LRot32(l,t);
blk[3]:= blk[3] - l;
blk[0]:= blk[0] - m;
blk[1]:= blk[1] xor r;
blk[1]:= RRot32(blk[1],13);
m:= blk[1] + KeyData[14];
r:= LRot32(blk[1],13) * KeyData[15];
l:= s_box[m and $1FF]; r:= LRot32(r,5);
t:= r and $1f; m:= LRot32(m,t);
l:= l xor r; r:= LRot32(r,5); l:= l xor r;
t:= r and $1f; l:= LRot32(l,t);
blk[2]:= blk[2] - l;
blk[3]:= blk[3] - m;
blk[0]:= blk[0] xor r;
blk[0]:= RRot32(blk[0],13);
m:= blk[0] + KeyData[12];
r:= LRot32(blk[0],13) * KeyData[13];
l:= s_box[m and $1FF]; r:= LRot32(r,5);
t:= r and $1f; m:= LRot32(m,t);
l:= l xor r; r:= LRot32(r,5); l:= l xor r;
t:= r and $1f; l:= LRot32(l,t);
blk[1]:= blk[1] - l;
blk[2]:= blk[2] - m;
blk[3]:= blk[3] xor r;
blk[3]:= RRot32(blk[3],13);
m:= blk[3] + KeyData[10];
r:= LRot32(blk[3],13) * KeyData[11];
l:= s_box[m and $1FF]; r:= LRot32(r,5);
t:= r and $1f; m:= LRot32(m,t);
l:= l xor r; r:= LRot32(r,5); l:= l xor r;
t:= r and $1f; l:= LRot32(l,t);
blk[0]:= blk[0] - l;
blk[1]:= blk[1] - m;
blk[2]:= blk[2] xor r;
blk[2]:= RRot32(blk[2],13);
m:= blk[2] + KeyData[8];
r:= LRot32(blk[2],13) * KeyData[9];
l:= s_box[m and $1FF]; r:= LRot32(r,5);
t:= r and $1f; m:= LRot32(m,t);
l:= l xor r; r:= LRot32(r,5); l:= l xor r;
t:= r and $1f; l:= LRot32(l,t);
blk[3]:= blk[3] - l;
blk[0]:= blk[0] - m;
blk[1]:= blk[1] xor r;
blk[1]:= RRot32(blk[1],13);
m:= blk[1] + KeyData[6];
r:= LRot32(blk[1],13) * KeyData[7];
l:= s_box[m and $1FF]; r:= LRot32(r,5);
t:= r and $1f; m:= LRot32(m,t);
l:= l xor r; r:= LRot32(r,5); l:= l xor r;
t:= r and $1f; l:= LRot32(l,t);
blk[2]:= blk[2] - l;
blk[3]:= blk[3] - m;
blk[0]:= blk[0] xor r;
blk[0]:= RRot32(blk[0],13);
m:= blk[0] + KeyData[4];
r:= LRot32(blk[0],13) * KeyData[5];
l:= s_box[m and $1FF]; r:= LRot32(r,5);
t:= r and $1f; m:= LRot32(m,t);
l:= l xor r; r:= LRot32(r,5); l:= l xor r;
t:= r and $1f; l:= LRot32(l,t);
blk[1]:= blk[1] - l;
blk[2]:= blk[2] - m;
blk[3]:= blk[3] xor r;
blk[3]:= LRot32(blk[3], 24);
blk[2]:= blk[2] xor s_box[((blk[3] shr 24) and $FF) + 256];
blk[1]:= blk[1] - s_box[ (blk[3] shr 16) and $FF];
blk[0]:= blk[0] - s_box[((blk[3] shr 8) and $FF) + 256];
blk[0]:= blk[0] xor s_box[ blk[3] and $FF];
blk[2]:= LRot32(blk[2], 24);
blk[1]:= blk[1] xor s_box[((blk[2] shr 24) and $FF) + 256];
blk[0]:= blk[0] - s_box[ (blk[2] shr 16) and $FF];
blk[3]:= blk[3] - s_box[((blk[2] shr 8) and $FF) + 256];
blk[3]:= blk[3] xor s_box[ blk[2] and $FF];
blk[1]:= blk[1] - blk[2]; blk[1]:= LRot32(blk[1], 24);
blk[0]:= blk[0] xor s_box[((blk[1] shr 24) and $FF) + 256];
blk[3]:= blk[3] - s_box[ (blk[1] shr 16) and $FF];
blk[2]:= blk[2] - s_box[((blk[1] shr 8) and $FF) + 256];
blk[2]:= blk[2] xor s_box[ blk[1] and $FF];
blk[0]:= blk[0] - blk[3]; blk[0]:= LRot32(blk[0], 24);
blk[3]:= blk[3] xor s_box[((blk[0] shr 24) and $FF) + 256];
blk[2]:= blk[2] - s_box[ (blk[0] shr 16) and $FF];
blk[1]:= blk[1] - s_box[((blk[0] shr 8) and $FF) + 256];
blk[1]:= blk[1] xor s_box[ blk[0] and $FF];
blk[3]:= LRot32(blk[3], 24);
blk[2]:= blk[2] xor s_box[((blk[3] shr 24) and $FF) + 256];
blk[1]:= blk[1] - s_box[ (blk[3] shr 16) and $FF];
blk[0]:= blk[0] - s_box[((blk[3] shr 8) and $FF) + 256];
blk[0]:= blk[0] xor s_box[ blk[3] and $FF];
blk[2]:= LRot32(blk[2], 24);
blk[1]:= blk[1] xor s_box[((blk[2] shr 24) and $FF) + 256];
blk[0]:= blk[0] - s_box[ (blk[2] shr 16) and $FF];
blk[3]:= blk[3] - s_box[((blk[2] shr 8) and $FF) + 256];
blk[3]:= blk[3] xor s_box[ blk[2] and $FF];
blk[1]:= blk[1] - blk[2]; blk[1]:= LRot32(blk[1], 24);
blk[0]:= blk[0] xor s_box[((blk[1] shr 24) and $FF) + 256];
blk[3]:= blk[3] - s_box[ (blk[1] shr 16) and $FF];
blk[2]:= blk[2] - s_box[((blk[1] shr 8) and $FF) + 256];
blk[2]:= blk[2] xor s_box[ blk[1] and $FF];
blk[0]:= blk[0] - blk[3]; blk[0]:= LRot32(blk[0], 24);
blk[3]:= blk[3] xor s_box[((blk[0] shr 24) and $FF) + 256];
blk[2]:= blk[2] - s_box[ (blk[0] shr 16) and $FF];
blk[1]:= blk[1] - s_box[((blk[0] shr 8) and $FF) + 256];
blk[1]:= blk[1] xor s_box[ blk[0] and $FF];
blk[0]:= blk[0] - KeyData[0]; blk[1]:= blk[1] - KeyData[1];
blk[2]:= blk[2] - KeyData[2]; blk[3]:= blk[3] - KeyData[3];
PDWord(@OutData)^:= Blk[0];
PDWord(longword(@OutData)+4)^:= Blk[1];
PDWord(longword(@OutData)+8)^:= Blk[2];
PDWord(longword(@OutData)+12)^:= Blk[3];
end;
end.
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