private void init(byte[] keyBlob)
{
if (keyBlob == null)
{
throw new ArgumentException("InvalidKeyBlob", "keyBlob");
}
if (RsaKeyBlob.isValidKeyBlob(keyBlob))
{
this.m_keyBlob = (byte[])keyBlob.Clone();
}
else
{
if (keyBlob.Length <= 12)
{
throw new CryptographicException("Key blob is invalid");
}
this.m_keyBlob = new byte[keyBlob.Length - 12];
Array.Copy(keyBlob, 12, this.m_keyBlob, 0, this.m_keyBlob.Length);
}
RsaKeyBlob.checkKeyBlob(this.m_keyBlob);
if (keyBlob[0] == 7)
{
this.m_bitLength = RsaKeyBlob.getPrivateKeyLength(this.m_keyBlob.Length);
this.m_isPrivateKey = true;
}
else
{
this.m_bitLength = RsaKeyBlob.getPublicKeyLength(this.m_keyBlob.Length);
this.m_isPrivateKey = false;
}
this.m_modulus = new byte[this.m_bitLength / 8];
Array.Copy(this.m_keyBlob, 20, this.m_modulus, 0, this.m_modulus.Length);
this.m_exponent = new byte[4];
Array.Copy(this.m_keyBlob, 16, this.m_exponent, 0, this.m_exponent.Length);
if (this.m_isPrivateKey)
{
int num = 20 + this.m_modulus.Length;
RsaKeyBlob.assignPrivateKeyValue(this.m_keyBlob, ref num, out this.m_P, this.m_modulus.Length / 2);
RsaKeyBlob.assignPrivateKeyValue(this.m_keyBlob, ref num, out this.m_Q, this.m_modulus.Length / 2);
RsaKeyBlob.assignPrivateKeyValue(this.m_keyBlob, ref num, out this.m_DP, this.m_modulus.Length / 2);
RsaKeyBlob.assignPrivateKeyValue(this.m_keyBlob, ref num, out this.m_DQ, this.m_modulus.Length / 2);
RsaKeyBlob.assignPrivateKeyValue(this.m_keyBlob, ref num, out this.m_inverseQ, this.m_modulus.Length / 2);
RsaKeyBlob.assignPrivateKeyValue(this.m_keyBlob, ref num, out this.m_D, this.m_modulus.Length);
}
}
private static bool isValidKeyBlob(byte[] putativeKeyBlob)
{
bool flag = RsaKeyBlob.isValuePresent(putativeKeyBlob, 0, 1, new int[]
{
6
});
int num = (int)BitConverter.ToUInt32(putativeKeyBlob, 12);
return(RsaKeyBlob.isValuePresent(putativeKeyBlob, 0, 1, new int[]
{
flag ? 6 : 7
}) && RsaKeyBlob.isValuePresent(putativeKeyBlob, 4, 2, new int[]
{
41984,
9216
}) && RsaKeyBlob.isValuePresent(putativeKeyBlob, 8, 4, new int[]
{
flag ? 826364754 : 843141970
}) && num == (flag ? RsaKeyBlob.getPublicKeyLength(putativeKeyBlob.Length) : RsaKeyBlob.getPrivateKeyLength(putativeKeyBlob.Length)));
}