public override byte[] Split(byte[] secretClear, int shareCount, int threshold)
{
Shares = HashiCorpShamir.Split(secretClear, shareCount, threshold);
// All encoded data is contained within the encoded shares,
// so there is no transformed form of the secret to return
return(new byte[0]);
}
public void TestSplit()
{
var secret = Encoding.UTF8.GetBytes("test");
var ret = HashiCorpShamir.Split(secret, 5, 3);
Assert.Equal(5, ret.Length);
foreach (var share in ret)
{
Assert.Equal(share.Length, secret.Length + 1);
}
}
public void TestSplit_invalid()
{
var secret = Encoding.UTF8.GetBytes("test");
Assert.ThrowsAny <ArgumentException>(
() => HashiCorpShamir.Split(secret, 0, 0));
Assert.ThrowsAny <ArgumentException>(
() => HashiCorpShamir.Split(secret, 2, 3));
Assert.ThrowsAny <ArgumentException>(
() => HashiCorpShamir.Split(secret, 1000, 3));
Assert.ThrowsAny <ArgumentException>(
() => HashiCorpShamir.Split(secret, 10, 1));
Assert.ThrowsAny <ArgumentException>(
() => HashiCorpShamir.Split(new byte[0], 3, 2));
Assert.ThrowsAny <ArgumentException>(
() => HashiCorpShamir.Split(null, 3, 2));
// if _, err := Split(secret, 0, 0); err == nil {
// t.Fatalf("expect error")
// }
// if _, err := Split(secret, 2, 3); err == nil {
// t.Fatalf("expect error")
// }
// if _, err := Split(secret, 1000, 3); err == nil {
// t.Fatalf("expect error")
// }
// if _, err := Split(secret, 10, 1); err == nil {
// t.Fatalf("expect error")
// }
// if _, err := Split(nil, 3, 2); err == nil {
// t.Fatalf("expect error")
// }
}
public void TestCombine()
{
var secret = Encoding.UTF8.GetBytes("test");
var ret = HashiCorpShamir.Split(secret, 5, 3);
// There is 5*4*3 possible choices,
// we will just brute force try them all
for (int i = 0; i < 5; i++)
{
for (var j = 0; j < 5; j++)
{
if (j == i)
{
continue;
}
for (var k = 0; k < 5; k++)
{
if (k == i || k == j)
{
continue;
}
var parts = new byte[][] { ret[i], ret[j], ret[k] };
var recomb = HashiCorpShamir.Combine(parts);
Assert.Equal(recomb, secret);
// if !bytes.Equal(recomb, secret) {
// t.Errorf("parts: (i:%d, j:%d, k:%d) %v", i, j, k, parts)
// t.Fatalf("bad: %v %v", recomb, secret)
// }
}
}
}
}