private bool method_1()
{
var num = _class1870.method_0(16);
if (num < 0)
{
return(false);
}
_class1870.method_1(16);
num = ((num << 8 | num >> 8) & 65535);
if (num % 31 != 0)
{
throw new SharpZipBaseException("Header checksum illegal");
}
if ((num & 3840) != 2048)
{
throw new SharpZipBaseException("Compression Method unknown");
}
if ((num & 32) == 0)
{
_int4 = 2;
}
else
{
_int4 = 1;
_int6 = 32;
}
return(true);
}
public int method_1(Class187 class187_0)
{
int num;
if ((num = class187_0.method_0(9)) >= 0)
{
int num2;
if ((num2 = (int)this.short_0[num]) >= 0)
{
class187_0.method_1(num2 & 15);
return(num2 >> 4);
}
int num3 = -(num2 >> 4);
int int_ = num2 & 15;
if ((num = class187_0.method_0(int_)) >= 0)
{
num2 = (int)this.short_0[num3 | num >> 9];
class187_0.method_1(num2 & 15);
return(num2 >> 4);
}
int num4 = class187_0.method_2();
num = class187_0.method_0(num4);
num2 = (int)this.short_0[num3 | num >> 9];
if ((num2 & 15) <= num4)
{
class187_0.method_1(num2 & 15);
return(num2 >> 4);
}
return(-1);
}
else
{
int num5 = class187_0.method_2();
num = class187_0.method_0(num5);
int num2 = (int)this.short_0[num];
if (num2 >= 0 && (num2 & 15) <= num5)
{
class187_0.method_1(num2 & 15);
return(num2 >> 4);
}
return(-1);
}
}
public int method_1(Class187 class1870)
{
int num;
if ((num = class1870.method_0(9)) >= 0)
{
int num2;
if ((num2 = _short0[num]) >= 0)
{
class1870.method_1(num2 & 15);
return(num2 >> 4);
}
var num3 = -(num2 >> 4);
var int_ = num2 & 15;
if ((num = class1870.method_0(int_)) >= 0)
{
num2 = _short0[num3 | num >> 9];
class1870.method_1(num2 & 15);
return(num2 >> 4);
}
var num4 = class1870.method_2();
num = class1870.method_0(num4);
num2 = _short0[num3 | num >> 9];
if ((num2 & 15) <= num4)
{
class1870.method_1(num2 & 15);
return(num2 >> 4);
}
return(-1);
}
else
{
var num5 = class1870.method_2();
num = class1870.method_0(num5);
int num2 = _short0[num];
if (num2 >= 0 && (num2 & 15) <= num5)
{
class1870.method_1(num2 & 15);
return(num2 >> 4);
}
return(-1);
}
}
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);
}
}
public bool method_0(Class187 class1870)
{
while (true)
{
switch (_int3)
{
case 0:
_int4 = class1870.method_0(5);
if (_int4 >= 0)
{
_int4 += 257;
class1870.method_1(5);
_int3 = 1;
goto IL_1FD;
}
return(false);
case 1:
goto IL_1FD;
case 2:
goto IL_1AF;
case 3:
goto IL_176;
case 4:
break;
case 5:
goto IL_2C;
default:
continue;
}
IL_F4:
int num;
while (((num = _class1970.method_1(class1870)) & -16) == 0)
{
_byte1[_int9++] = (_byte2 = (byte)num);
if (_int9 == _int7)
{
return(true);
}
}
if (num >= 0)
{
if (num >= 17)
{
_byte2 = 0;
}
else if (_int9 == 0)
{
goto IL_2A6;
}
_int8 = num - 16;
_int3 = 5;
goto IL_2C;
}
return(false);
IL_176:
while (_int9 < _int6)
{
var num2 = class1870.method_0(3);
if (num2 < 0)
{
return(false);
}
class1870.method_1(3);
_byte0[Int2[_int9]] = (byte)num2;
_int9++;
}
_class1970 = new Class197(_byte0);
_byte0 = null;
_int9 = 0;
_int3 = 4;
goto IL_F4;
IL_2C:
var num3 = Int1[_int8];
var num4 = class1870.method_0(num3);
if (num4 < 0)
{
return(false);
}
class1870.method_1(num3);
num4 += Int0[_int8];
if (_int9 + num4 > _int7)
{
break;
}
while (num4-- > 0)
{
_byte1[_int9++] = _byte2;
}
if (_int9 == _int7)
{
return(true);
}
_int3 = 4;
continue;
IL_1AF:
_int6 = class1870.method_0(4);
if (_int6 >= 0)
{
_int6 += 4;
class1870.method_1(4);
_byte0 = new byte[19];
_int9 = 0;
_int3 = 3;
goto IL_176;
}
return(false);
IL_1FD:
_int5 = class1870.method_0(5);
if (_int5 >= 0)
{
_int5++;
class1870.method_1(5);
_int7 = _int4 + _int5;
_byte1 = new byte[_int7];
_int3 = 2;
goto IL_1AF;
}
return(false);
}
throw new SharpZipBaseException();
IL_2A6:
throw new SharpZipBaseException();
}
public bool method_0(Class187 class187_0)
{
while (true)
{
switch (this.int_3)
{
case 0:
this.int_4 = class187_0.method_0(5);
if (this.int_4 >= 0)
{
this.int_4 += 257;
class187_0.method_1(5);
this.int_3 = 1;
goto IL_1FD;
}
return(false);
case 1:
goto IL_1FD;
case 2:
goto IL_1AF;
case 3:
goto IL_176;
case 4:
break;
case 5:
goto IL_2C;
default:
continue;
}
IL_F4:
int num;
while (((num = this.class197_0.method_1(class187_0)) & -16) == 0)
{
this.byte_1[this.int_9++] = (this.byte_2 = (byte)num);
if (this.int_9 == this.int_7)
{
return(true);
}
}
if (num >= 0)
{
if (num >= 17)
{
this.byte_2 = 0;
}
else if (this.int_9 == 0)
{
goto IL_2A6;
}
this.int_8 = num - 16;
this.int_3 = 5;
goto IL_2C;
}
return(false);
IL_176:
while (this.int_9 < this.int_6)
{
int num2 = class187_0.method_0(3);
if (num2 < 0)
{
return(false);
}
class187_0.method_1(3);
this.byte_0[Class198.int_2[this.int_9]] = (byte)num2;
this.int_9++;
}
this.class197_0 = new Class197(this.byte_0);
this.byte_0 = null;
this.int_9 = 0;
this.int_3 = 4;
goto IL_F4;
IL_2C:
int num3 = Class198.int_1[this.int_8];
int num4 = class187_0.method_0(num3);
if (num4 < 0)
{
return(false);
}
class187_0.method_1(num3);
num4 += Class198.int_0[this.int_8];
if (this.int_9 + num4 > this.int_7)
{
break;
}
while (num4-- > 0)
{
this.byte_1[this.int_9++] = this.byte_2;
}
if (this.int_9 == this.int_7)
{
return(true);
}
this.int_3 = 4;
continue;
IL_1AF:
this.int_6 = class187_0.method_0(4);
if (this.int_6 >= 0)
{
this.int_6 += 4;
class187_0.method_1(4);
this.byte_0 = new byte[19];
this.int_9 = 0;
this.int_3 = 3;
goto IL_176;
}
return(false);
IL_1FD:
this.int_5 = class187_0.method_0(5);
if (this.int_5 >= 0)
{
this.int_5++;
class187_0.method_1(5);
this.int_7 = this.int_4 + this.int_5;
this.byte_1 = new byte[this.int_7];
this.int_3 = 2;
goto IL_1AF;
}
return(false);
}
throw new SharpZipBaseException();
IL_2A6:
throw new SharpZipBaseException();
}