private MemoryStream method_5(Stream A_0, string A_1, Class994 A_2)
{
byte[] buffer = new byte[0x10];
MemoryStream stream = new MemoryStream();
long length = A_0.Length;
int num2 = 0;
A_0.Position = 0L;
uint num3 = 0;
using (Class989 class2 = new Class989(A_2.method_6(), A_2.method_7()))
{
Class992 class3 = A_2.method_7();
Class993 class4 = A_2.method_6();
IntPtr ptr = class2.method_4(A_1, class3.method_0(), num3, class4.method_12());
while (num2 < length)
{
for (int i = A_0.Read(buffer, 0, 0x10); i < 0x10; i++)
{
buffer[i] = 1;
}
buffer = class2.method_3(ptr, buffer);
stream.Write(buffer, 0, 0x10);
num2 += 0x10;
if ((num2 % 0x200) == 0)
{
num3++;
Class990.CryptDestroyKey(ptr);
ptr = class2.method_4(A_1, class3.method_0(), num3, class4.method_12());
}
}
Class990.CryptDestroyKey(ptr);
}
stream.Position = 0L;
return(stream);
}
internal bool method_2(string A_0)
{
Class992 class2 = this.method_1();
IntPtr ptr = this.method_4(A_0, class2.method_0(), 0, this.method_0().method_12());
byte[] buffer = this.method_3(ptr, class2.method_2());
byte[] buffer2 = this.method_3(ptr, class2.method_4());
Class990.CryptDestroyKey(ptr);
byte[] buffer3 = new SHA1Managed().ComputeHash(buffer);
int index = 0;
int length = buffer2.Length;
while (index < length)
{
if (buffer2[index] != buffer3[index])
{
return(false);
}
index++;
}
return(true);
}