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(CPZ5): another encryption scheme.

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morkt
2016-09-27 10:40:02 +04:00
parent a244509039
commit d0c5f958b9
3 changed files with 25 additions and 9 deletions
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10
ArcFormats/Cmvs/ArcCPZ.cs
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@@ -290,13 +290,7 @@ namespace GameRes.Formats.Purple
for (int i = 0; i < secret_length; ++i)
secret_key[i] = secret[i] - key;
uint shift = key;
shift = (shift >> 8) ^ key;
shift = (shift >> 8) ^ key;
shift = (shift >> 8) ^ key;
shift = (shift >> 8) ^ key;
shift = ((shift ^ 0xB) & 0xF) + 7;
int shift = (int)(((key >> 24) ^ (key >> 16) ^ (key >> 8) ^ key ^ 0xB) & 0xF) + 7;
unsafe
{
fixed (byte* raw = data)
@@ -305,7 +299,7 @@ namespace GameRes.Formats.Purple
int i = 5;
for (int n = data.Length / 4; n > 0; --n)
{
*data32 = Binary.RotR ((secret_key[i] ^ *data32) + scheme.IndexAddend, (int)shift) + 0x01010101;
*data32 = Binary.RotR ((secret_key[i] ^ *data32) + scheme.IndexAddend, shift) + 0x01010101;
++data32;
i = (i + 1) % 24;
}