private BigInteger DecodePrimaryKey(byte[] decodeKey, byte[] primaryKey)
{
var engine = new Gost28147Engine();
var param = new ParametersWithSBox(
new KeyParameter(decodeKey),
Gost28147Engine.GetSBox("E-A"));
engine.Init(false, param);
var buf = new byte[32];
engine.ProcessBlock(primaryKey, 0, buf, 0);
engine.ProcessBlock(primaryKey, 8, buf, 8);
engine.ProcessBlock(primaryKey, 16, buf, 16);
engine.ProcessBlock(primaryKey, 24, buf, 24);
return(new BigInteger(1, buf.Reverse().ToArray()));
}
private BigInteger DecodePrimaryKey(byte[] decodeKey, byte[] primaryKey)
{
Gost28147Engine engine = new Gost28147Engine();
byte[] sbox =
ProviderType == ProviderType.CryptoPro_2001
? Gost28147Engine.GetSBox("E-A")
: Gost28147_TC26ParamSetZ;
ParametersWithSBox param = new ParametersWithSBox(
new KeyParameter(decodeKey), sbox);
engine.Init(false, param);
byte[] buf = new byte[primaryKey.Length];
for (int i = 0; i < primaryKey.Length; i += 8)
{
engine.ProcessBlock(primaryKey, i, buf, i);
}
return(new BigInteger(1, buf.Reverse().ToArray()));
}
