public static SplitSecret Split(SecretShareType shareType, byte[] secret, int threshold, Diffuser diffuser)
{
var irreduciblePolynomial = IrreduciblePolynomial.CreateOfByteSize(secret.Length);
var rawSecret = secret.ToBigIntegerFromBigEndianUnsignedBytes();
var diffusedSecret = diffuser.Scramble(rawSecret, secret.Length);
var secretCoefficient = new FiniteFieldPolynomial(irreduciblePolynomial, diffusedSecret);
var allCoefficients = new[] { secretCoefficient }
.Concat(
GetRandomPolynomials(
irreduciblePolynomial,
threshold - 1)
)
.ToArray();
var passPhrase = new SecureString();
try {
foreach (var currentChar in secret.ToHexString())
{
passPhrase.AppendChar(currentChar);
}
}
catch {
passPhrase = null;
}
if ((passPhrase == null) || (passPhrase.Length == 0))
{
passPhrase = null;
}
return(new SplitSecret(shareType, threshold, irreduciblePolynomial, allCoefficients, passPhrase));
}
public static SplitSecret Split(SecretShareType shareType, byte[] secret, int threshold, Diffuser diffuser)
{
var irreduciblePolynomial = IrreduciblePolynomial.CreateOfByteSize(secret.Length);
var rawSecret = secret.ToBigIntegerFromBigEndianUnsignedBytes();
var diffusedSecret = diffuser.Scramble(rawSecret, secret.Length);
var secretCoefficient = new FiniteFieldPolynomial(irreduciblePolynomial, diffusedSecret);
var allCoefficients = new[] { secretCoefficient }
.Concat(
GetRandomPolynomials(
irreduciblePolynomial,
threshold - 1)
)
.ToArray();
var passPhrase = new SecureString();
try {
foreach (var currentChar in secret.ToHexString()) {
passPhrase.AppendChar(currentChar);
}
}
catch {
passPhrase = null;
}
if((passPhrase == null) || (passPhrase.Length == 0)) {
passPhrase = null;
}
return new SplitSecret(shareType, threshold, irreduciblePolynomial, allCoefficients, passPhrase);
}
public SplitSecret(SecretShareType shareType, int threshold, IrreduciblePolynomial irreduciblePolynomial, FiniteFieldPolynomial[] allCoefficients, SecureString passPhrase = null)
{
_ShareType = shareType;
Threshold = threshold;
_IrreduciblePolynomial = irreduciblePolynomial;
_AllCoefficients = allCoefficients;
_PassPhrase = passPhrase;
}
public CombinedSecret(SecretShareType shareType, byte[] recoveredBytes)
{
ShareType = shareType;
// TODO: Use ProtectedData.Protect, but that'd pull in another DLL
RecoveredBytes = recoveredBytes;
}
public CombinedSecret(SecretShareType shareType, byte[] recoveredBytes) {
ShareType = shareType;
// TODO: Use ProtectedData.Protect, but that'd pull in another DLL
RecoveredBytes = recoveredBytes;
}
private static SplitSecret Split(SecretShareType shareType, byte[] secret, int threshold)
{
return(Split(shareType, secret, threshold, DefaultDiffuser));
}
private static SplitSecret Split(SecretShareType shareType, byte[] secret, int threshold)
{
return Split(shareType, secret, threshold, DefaultDiffuser);
}
public SplitSecret(SecretShareType shareType, int threshold, IrreduciblePolynomial irreduciblePolynomial, FiniteFieldPolynomial[] allCoefficients, SecureString passPhrase = null)
{
_ShareType = shareType;
Threshold = threshold;
_IrreduciblePolynomial = irreduciblePolynomial;
_AllCoefficients = allCoefficients;
_PassPhrase = passPhrase;
}
public SecretShare(SecretShareType shareType, FiniteFieldPoint point, string checksum = null) {
ShareType = shareType;
Point = point;
Checksum = checksum;
}
public SecretShare(SecretShareType shareType, FiniteFieldPoint point, string checksum = null)
{
ShareType = shareType;
Point = point;
Checksum = checksum;
}
