// Token: 0x0600498B RID: 18827 RVA: 0x0018A1F4 File Offset: 0x001885F4
public static RSACryptoServiceProvider CryptoServiceProviderFromPublicKeyInfo(string base64EncodedKey)
{
try
{
return(PEMKeyLoader.CryptoServiceProviderFromPublicKeyInfo(Convert.FromBase64String(base64EncodedKey)));
}
catch (FormatException)
{
}
return(null);
}
// Token: 0x0600498A RID: 18826 RVA: 0x00189FB4 File Offset: 0x001883B4
public static RSACryptoServiceProvider CryptoServiceProviderFromPublicKeyInfo(byte[] x509key)
{
byte[] a = new byte[15];
if (x509key == null || x509key.Length == 0)
{
return(null);
}
MemoryStream input = new MemoryStream(x509key);
BinaryReader binaryReader = new BinaryReader(input);
RSACryptoServiceProvider result;
try
{
ushort num = binaryReader.ReadUInt16();
if (num == 33072)
{
binaryReader.ReadByte();
}
else
{
if (num != 33328)
{
return(null);
}
binaryReader.ReadInt16();
}
a = binaryReader.ReadBytes(15);
if (!PEMKeyLoader.CompareBytearrays(a, PEMKeyLoader.SeqOID))
{
result = null;
}
else
{
num = binaryReader.ReadUInt16();
if (num == 33027)
{
binaryReader.ReadByte();
}
else
{
if (num != 33283)
{
return(null);
}
binaryReader.ReadInt16();
}
byte b = binaryReader.ReadByte();
if (b != 0)
{
result = null;
}
else
{
num = binaryReader.ReadUInt16();
if (num == 33072)
{
binaryReader.ReadByte();
}
else
{
if (num != 33328)
{
return(null);
}
binaryReader.ReadInt16();
}
num = binaryReader.ReadUInt16();
byte b2 = 0;
byte b3;
if (num == 33026)
{
b3 = binaryReader.ReadByte();
}
else
{
if (num != 33282)
{
return(null);
}
b2 = binaryReader.ReadByte();
b3 = binaryReader.ReadByte();
}
byte[] array = new byte[4];
array[0] = b3;
array[1] = b2;
byte[] value = array;
int num2 = BitConverter.ToInt32(value, 0);
if (binaryReader.PeekChar() == 0)
{
binaryReader.ReadByte();
num2--;
}
byte[] modulus = binaryReader.ReadBytes(num2);
if (binaryReader.ReadByte() != 2)
{
result = null;
}
else
{
int count = (int)binaryReader.ReadByte();
byte[] exponent = binaryReader.ReadBytes(count);
RSACryptoServiceProvider rsacryptoServiceProvider = new RSACryptoServiceProvider();
rsacryptoServiceProvider.ImportParameters(new RSAParameters
{
Modulus = modulus,
Exponent = exponent
});
result = rsacryptoServiceProvider;
}
}
}
}
finally
{
binaryReader.Close();
}
return(result);
}
