internal X509Certificate2 CreateCertificate(
X509Certificate2 issuer,
X500DistinguishedName subject,
IEnumerable <X509Extension> extensions,
DateTimeOffset notBefore,
DateTimeOffset notAfter, out RSA key)
{
key = CreateKeyMaterial(RSAMinimumKeySizeInBits);
var request = new CertificateRequest(subject, key, HashAlgorithmName.SHA256, RSASignaturePadding.Pkcs1);
foreach (var extension in extensions)
{
request.CertificateExtensions.Add(extension);
}
var serialNumber = new byte[20];
var random = new RandomBigInteger();
random.NextBytes(serialNumber);
return(request.Create(issuer, notBefore, notAfter, serialNumber));
RSA CreateKeyMaterial(int minimumKeySize)
{
var rsa = RSA.Create(minimumKeySize);
if (rsa.KeySize < minimumKeySize)
{
throw new InvalidOperationException($"Failed to create a key with a size of {minimumKeySize} bits");
}
return(rsa);
}
}
private static BigInteger createModel(byte[] owner, string properties, string hash)
{
StorageContext ctx = Storage.CurrentContext;
Model model = new Model();
model.owner = owner;
model.properties = properties;
model.hash = hash;
int seed = (int)(DateTime.UtcNow.Subtract(new DateTime(1970, 1, 1))).TotalSeconds;
RandomBigInteger rnd = new RandomBigInteger(seed);
BigInteger id = rnd.NextBigInteger(63);
while (Storage.Get(ctx, concatKey("models/", id)).Length != 0)
{
id = rnd.NextBigInteger(63);
}
model.id = id;
byte[] key = concatKey("models/", id);
byte[] obj = Model.ToByteArray(model);
Storage.Put(ctx, key, obj);
return(id);
}
public static void KeyGen(int key_size, out BigInteger oe, out BigInteger od, out BigInteger on)
{
RandomBigInteger rand = new RandomBigInteger();
BigInteger p = rand.NextBigInteger(key_size / 2);
p = p.GetNextPrime();
int qBitLen = key_size - p.BitLength();
BigInteger q, n;
do
{
q = rand.NextBigInteger(qBitLen);
q = q.GetNextPrime();
n = p * q;
qBitLen++;
} while (n.BitLength() < key_size + 1);
BigInteger phi = (p - 1) * (q - 1);
BigInteger e = 3;
while (BigInteger.GreatestCommonDivisor(e, phi) != 1)
{
e += 2;
}
BigInteger d = (e.ModInverse(phi));
oe = e;
od = d;
on = n;
}
BigInteger RandomWithGCD1(BigInteger min, BigInteger max)
{
RandomBigInteger rbi = new RandomBigInteger();
BigInteger value = 0;
do
{
value = rbi.NextBigInteger(min, max);
BigInteger a = BigInteger.GreatestCommonDivisor(value, max);
} while (BigInteger.GreatestCommonDivisor(value, max) != 1);
return(value);
}
protected Task <BigInteger> RandomIntegerBelowAsync(BigInteger max)
{
return(RandomBigInteger.GenerateAsync(max, this.RandomProvider));
}