public SpanContainer(CTR_DRBG_CTX state, byte txSequenceNumber, byte rxSequenceNumber, byte[] nonce)
: this(txSequenceNumber, rxSequenceNumber)
{
_state = state;
SpanState = SpanStates.Span;
Array.Copy(nonce, _span, 16);
}
/// <summary>
/// Gets 16 bytes of pseudo random data
/// </summary>
/// <returns>16 bytes of pseudo random data</returns>
public byte[] GetRandomData()
{
var ctx = new CTR_DRBG_CTX();
var personalization = new byte[SecurityS2Utils.PERSONALIZATION_SIZE];
SecurityS2Utils.AesCtrDrbgInstantiate(ref ctx, GetEntropyInput(), personalization);
var ret = new byte[SecurityS2Utils.KEY_SIZE];
SecurityS2Utils.AesCtrDrbgGenerate(ref ctx, ret);
return(ret);
}
public static int NextNonceGenerate(ref CTR_DRBG_CTX ctx, byte[] rand)
{
lock (_syncObj)
{
if (Is64Bit)
{
return(NextNonceGenerate_64(ref ctx, rand));
}
else
{
return(NextNonceGenerate_32(ref ctx, rand));
}
}
}
public static void NextNonceInstantiate(ref CTR_DRBG_CTX ctx, byte[] ei_sender, byte[] ei_receiver, byte[] personalization)
{
lock (_syncObj)
{
if (Is64Bit)
{
NextNonceInstantiate_64(ref ctx, ei_sender, ei_receiver, personalization);
}
else
{
NextNonceInstantiate_32(ref ctx, ei_sender, ei_receiver, personalization);
}
}
}
public static void AesCtrDrbgInstantiate(ref CTR_DRBG_CTX ctx, byte[] entropy_input, byte[] personalization)
{
lock (_syncObj)
{
if (Is64Bit)
{
AesCtrDrbgInstantiate_64(ref ctx, entropy_input, personalization);
}
else
{
AesCtrDrbgInstantiate_32(ref ctx, entropy_input, personalization);
}
}
}
private extern static int NextNonceGenerate_64(ref CTR_DRBG_CTX ctx,
[MarshalAs(UnmanagedType.LPArray)] byte[] rand);
private extern static void NextNonceInstantiate_64(ref CTR_DRBG_CTX ctx,
[In, MarshalAs(UnmanagedType.LPArray, SizeConst = SecurityS2Utils.NONCE_SIZE)] byte[] ei_sender,
[In, MarshalAs(UnmanagedType.LPArray, SizeConst = SecurityS2Utils.NONCE_SIZE)] byte[] ei_receiver,
[In, MarshalAs(UnmanagedType.LPArray, SizeConst = SecurityS2Utils.PERSONALIZATION_SIZE)] byte[] personalization);
private extern static int AesCtrDrbgGenerate_32(ref CTR_DRBG_CTX ctx,
[MarshalAs(UnmanagedType.LPArray)] byte[] rand);
private extern static void AesCtrDrbgInstantiate_32(ref CTR_DRBG_CTX ctx,
[In, MarshalAs(UnmanagedType.LPArray, SizeConst = 32)] byte[] entropy_input,
[In, MarshalAs(UnmanagedType.LPArray, SizeConst = 32)] byte[] personalization);