// Token: 0x060000BB RID: 187 RVA: 0x00006B9C File Offset: 0x00004D9C
public void tmethod_92(byte[] byteDizi_0, int sayıInt_0)
{
int num = this.field_5;
if (!this.field_7)
{
if (num < this.field_13)
{
throw new Class_38("data too short");
}
num -= this.field_13;
}
if (num > 0)
{
byte[] array = new byte[16];
Array.Copy(this.field_4, 0, array, 0, num);
this.cmethod_94(array, num, byteDizi_0, sayıInt_0);
}
byte[] array2 = new byte[16];
Class_33.dmethod_96((ulong)((long)this.field_3.Length * 8L), array2, 0);
Class_33.dmethod_96(this.field_16 * 8UL, array2, 8);
Class_34.cmethod_104(this.field_15, array2);
this.field_2.xmethod_111(this.field_15);
byte[] array3 = new byte[16];
this.field_1.lmethod_108(this.field_10, 0, array3, 0);
Class_34.cmethod_104(array3, this.field_15);
this.field_12 = new byte[this.field_13];
Array.Copy(array3, 0, this.field_12, 0, this.field_13);
if (this.field_7)
{
Array.Copy(this.field_12, 0, byteDizi_0, sayıInt_0 + this.field_5, this.field_13);
}
else
{
byte[] array4 = new byte[this.field_13];
Array.Copy(this.field_4, num, array4, 0, this.field_13);
if (!Class_29.ConstantTimeAreEqual(this.field_12, array4))
{
throw new Class_38("mac check in GCM failed");
}
}
this.gmethod_93(false);
}
// Token: 0x060000B0 RID: 176 RVA: 0x000064C4 File Offset: 0x000046C4
public static string Decrypt(byte[] encryptedBytes, byte[] key, byte[] iv)
{
string text = string.Empty;
string result;
try
{
Class_33 class_ = new Class_33(new Class_27(), null);
Class_26 arg_ = new Class_26(new Class_39(key), 128, iv, null);
class_.pmethod_89(false, arg_);
byte[] array = new byte[class_.smethod_90(encryptedBytes.Length)];
int sayıInt_ = class_.xmethod_91(encryptedBytes, 0, encryptedBytes.Length, array, 0);
class_.tmethod_92(array, sayıInt_);
text = Encoding.UTF8.GetString(array).TrimEnd("\r\n\0".ToCharArray());
result = text;
}
catch
{
result = text;
}
return(result);
}
// Token: 0x060000B8 RID: 184 RVA: 0x00006848 File Offset: 0x00004A48
public virtual void pmethod_89(bool bool_0, Class_44 arg_0)
{
this.field_7 = bool_0;
this.field_12 = null;
if (arg_0 is Class_26)
{
Class_26 class_ = (Class_26)arg_0;
this.field_14 = class_.gmethod_73();
this.field_3 = class_.tmethod_72();
int num = class_.prop_1;
if (num < 96 || num > 128 || num % 8 != 0)
{
throw new ArgumentException("Invalid value for MAC size: " + num.ToString());
}
this.field_13 = num / 8;
this.field_11 = class_.prop_0;
}
else
{
if (!(arg_0 is Class_41))
{
throw new ArgumentException("invalid parameters passed to GCM");
}
Class_41 class_2 = (Class_41)arg_0;
this.field_14 = class_2.cmethod_114();
this.field_3 = null;
this.field_13 = 16;
this.field_11 = (Class_39)class_2.prop_0;
}
int num2 = bool_0 ? 16 : (16 + this.field_13);
this.field_4 = new byte[num2];
if (this.field_14 == null || this.field_14.Length < 1)
{
throw new ArgumentException("IV must be at least 1 byte");
}
if (this.field_3 == null)
{
this.field_3 = new byte[0];
}
this.field_1.dmethod_106(true, this.field_11);
this.field_8 = new byte[16];
this.field_1.lmethod_108(this.field_8, 0, this.field_8, 0);
this.field_2.smethod_110(this.field_8);
this.field_9 = this.vmethod_95(this.field_3);
if (this.field_14.Length == 12)
{
this.field_10 = new byte[16];
Array.Copy(this.field_14, 0, this.field_10, 0, this.field_14.Length);
this.field_10[15] = 1;
}
else
{
this.field_10 = this.vmethod_95(this.field_14);
byte[] array = new byte[16];
Class_33.dmethod_96((ulong)((long)this.field_14.Length * 8L), array, 8);
Class_34.cmethod_104(this.field_10, array);
this.field_2.xmethod_111(this.field_10);
}
this.field_15 = Class_29.Clone(this.field_9);
this.field_6 = Class_29.Clone(this.field_10);
this.field_5 = 0;
this.field_16 = 0UL;
}
