private byte[] method_2(Stream A_0, Interface61 A_1, Class187 A_2, byte[] A_3)
{
byte[] bytes = BitConverter.GetBytes(A_0.Length);
SHA1 sha = new SHA1Managed();
using (Stream1 stream = A_1.imethod_2(BookmarkStart.b("漩䈫䴭䈯䬱䐳䈵崷帹氻弽⌿⥁╃ⅅⵇ", 4)))
{
int num = (int)(A_0.Length / 0x1000L);
if ((A_0.Length % 0x1000L) != 0L)
{
num++;
}
for (int i = 0; i < num; i++)
{
int count = Math.Min(0x1000, ((int)A_0.Length) - (i * 0x1000));
byte[] buffer = new byte[count];
byte[] buffer3 = new byte[count];
A_0.Read(buffer, 0, count);
byte[] buffer4 = sha.ComputeHash(this.class299_0.method_12(A_2.method_14(), BitConverter.GetBytes(i)));
buffer3 = this.method_11(buffer, A_2.method_2(), A_3, buffer4);
bytes = this.class299_0.method_12(bytes, buffer3);
}
stream.Write(bytes, 0, bytes.Length);
}
return(bytes);
}
private void method_1(Stream A_0, Interface61 A_1, string A_2)
{
SHA1 sha = new SHA1Managed();
using (Stream1 stream = A_1.imethod_2(BookmarkStart.b("欭帯儱䘳伵䠷丹唻儽⸿ୁ⩃⁅❇", 8)))
{
Class62 class2 = new Class62();
class2.method_1(0x40004);
class2.method_3(0x40);
Class187 class3 = class2.method_4().method_0();
this.method_3(class3);
class3.method_15(this.method_10(class3.method_0()));
Class190 class4 = class2.method_4().method_4().method_0();
this.method_4(class4);
class4.method_17(this.method_10(class4.method_2()));
byte[] buffer = this.method_10(class4.method_2());
byte[] buffer2 = new byte[] { 0xfe, 0xa7, 210, 0x76, 0x3b, 0x4b, 0x9e, 0x79 };
byte[] buffer3 = this.class299_0.method_9(A_2, class4.method_16(), buffer2, class4.method_6() >> 3, class4.method_0());
class4.method_19(this.method_11(buffer, class4.method_4(), buffer3, class4.method_16()));
byte[] buffer4 = new byte[] { 0xd7, 170, 15, 0x6d, 0x30, 0x61, 0x34, 0x4e };
buffer3 = this.class299_0.method_9(A_2, class4.method_16(), buffer4, class4.method_6() >> 3, class4.method_0());
class4.method_21(this.method_11(sha.ComputeHash(buffer), class4.method_4(), buffer3, class4.method_16()));
byte[] buffer5 = this.method_10(class3.method_4() / 8);
byte[] buffer6 = new byte[] { 20, 110, 11, 0xe7, 0xab, 0xac, 0xd0, 0xd6 };
buffer3 = this.class299_0.method_9(A_2, class4.method_16(), buffer6, class4.method_6() >> 3, class4.method_0());
class4.method_23(this.method_11(buffer5, class4.method_4(), buffer3, class4.method_16()));
Class188 class5 = class2.method_4().method_2();
byte[] buffer7 = new byte[] { 0x5f, 0xb2, 0xad, 1, 12, 0xb9, 0xe1, 0xf6 };
byte[] buffer8 = sha.ComputeHash(this.class299_0.method_12(class3.method_14(), buffer7));
buffer8 = this.class299_0.method_13(buffer8, class3.method_2(), 0);
byte[] buffer9 = this.method_10(class3.method_6());
class5.method_1(this.method_11(buffer9, class3.method_2(), buffer5, buffer8));
byte[] buffer10 = this.method_2(A_0, A_1, class3, buffer5);
HMACSHA1 hmacsha = new HMACSHA1 {
Key = this.class299_0.method_13(buffer9, class3.method_6(), 0)
};
byte[] buffer11 = new byte[] { 160, 0x67, 0x7f, 2, 0xb2, 0x2c, 0x84, 0x33 };
byte[] buffer12 = sha.ComputeHash(this.class299_0.method_12(class3.method_14(), buffer11));
buffer12 = this.class299_0.method_13(buffer12, class3.method_2(), 0);
class5.method_3(this.method_11(hmacsha.ComputeHash(buffer10), class3.method_2(), buffer5, buffer12));
class2.method_5(stream);
}
}
internal Stream method_1()
{
int num = 0;
if (this.byte_0 == null)
{
throw new InvalidOperationException(BookmarkStart.b("漥䘧䤩䌫尭䈯圱圳䈵ᠷ䨹崻䴽㌿㕁⭃㑅ⱇ摉", num));
}
MemoryStream stream2 = new MemoryStream();
Class187 class2 = this.class62_0.method_4().method_0();
bool flag = this.method_0();
HashAlgorithm algorithm = null;
if (flag)
{
algorithm = new SHA512Managed();
}
else
{
algorithm = new SHA1Managed();
}
using (Stream1 stream = this.interface61_0.imethod_0(BookmarkStart.b("挥䘧䤩師圭䀯䘱儳刵样嬹弻唽ℿ╁⅃", num)))
{
byte[] buffer = new byte[8];
stream.Read(buffer, 0, 8);
int count = BitConverter.ToInt32(buffer, 0);
int num3 = count % class2.method_2();
int num4 = (num3 > 0) ? ((count + class2.method_2()) - num3) : count;
byte[] buffer3 = new byte[num4];
stream.Read(buffer3, 0, num4);
byte[] buffer4 = this.class299_0.method_12(buffer, buffer3);
if (!this.method_4(buffer4))
{
throw new Exception(BookmarkStart.b("挥䘧䤩師圭䀯䘱儳刵ᠷ䨹崻崽⬿⍁⍃⍅桇⍉㽋湍㥏㱑≓㝕㑗㍙㡛", num));
}
byte[] dst = new byte[count];
int num6 = ((num4 % 0x1000) == 0) ? (num4 / 0x1000) : ((num4 / 0x1000) + 1);
for (int i = 0; i < num6; i++)
{
int num7 = Math.Min(0x1000, num4 - (i * 0x1000));
byte[] buffer5 = new byte[num7];
byte[] src = new byte[num7];
Buffer.BlockCopy(buffer3, i * 0x1000, buffer5, 0, num7);
byte[] buffer7 = algorithm.ComputeHash(this.class299_0.method_12(class2.method_14(), BitConverter.GetBytes(i)));
src = this.method_5(buffer5, class2.method_2(), this.byte_0, buffer7, num7);
num7 = (i == (num6 - 1)) ? (num7 - (num4 - count)) : num7;
Buffer.BlockCopy(src, 0, dst, i * 0x1000, num7);
}
stream2.Write(dst, 0, count);
stream2.Position = 0L;
}
return(stream2);
}
private bool method_4(byte[] A_0)
{
Class187 class2 = this.class62_0.method_4().method_0();
Class188 class3 = this.class62_0.method_4().method_2();
bool flag = this.method_0();
HashAlgorithm algorithm = null;
if (flag)
{
algorithm = new SHA512Managed();
}
else
{
algorithm = new SHA1Managed();
}
byte[] buffer = new byte[] { 0x5f, 0xb2, 0xad, 1, 12, 0xb9, 0xe1, 0xf6 };
byte[] buffer2 = algorithm.ComputeHash(this.class299_0.method_12(class2.method_14(), buffer));
buffer2 = this.class299_0.method_13(buffer2, class2.method_2(), 0);
byte[] buffer3 = this.method_5(class3.method_0(), class2.method_2(), this.byte_0, buffer2, class2.method_6());
HMAC hmac = null;
if (flag)
{
hmac = new HMACSHA512();
}
else
{
hmac = new HMACSHA1();
}
hmac.Key = this.class299_0.method_13(buffer3, class2.method_6(), 0);
byte[] buffer4 = hmac.ComputeHash(A_0);
byte[] buffer5 = new byte[] { 160, 0x67, 0x7f, 2, 0xb2, 0x2c, 0x84, 0x33 };
byte[] buffer6 = algorithm.ComputeHash(this.class299_0.method_12(class2.method_14(), buffer5));
buffer6 = this.class299_0.method_13(buffer6, class2.method_2(), 0);
byte[] buffer7 = this.method_5(class3.method_2(), class2.method_2(), this.byte_0, buffer6, class2.method_6());
return(this.class299_0.method_15(buffer4, buffer7));
}