private static X509Certificate2 SetEcDsaPrivateKey(X509Certificate2 cert, string privateKey)
{
string[] keyParts = privateKey.Split('-', StringSplitOptions.RemoveEmptyEntries);
byte[] keyBytes = Convert.FromBase64String(keyParts[1]);
ECDsa eccPrivateKey = ECDsa.Create();
if (eccPrivateKey == null)
{
throw new PlatformNotSupportedException("Unable to create ECDsa");
}
switch (keyParts[0])
{
case "BEGIN PRIVATE KEY":
eccPrivateKey.ImportPkcs8PrivateKey(keyBytes, out _);
break;
case "BEGIN EC PRIVATE KEY":
eccPrivateKey.ImportECPrivateKey(keyBytes, out _);
break;
default:
throw new ArgumentException("Invalid PrivateKey String", nameof(privateKey));
}
return(cert.CopyWithPrivateKey(eccPrivateKey).FixForWindows());
}
public TemporaryExposureKeySignService(
IConfiguration config,
ILogger <TemporaryExposureKeySignService> logger)
{
Logger = logger;
Logger.LogInformation($"{nameof(TemporaryExposureKeySignService)} constructor");
VerificationKeyId = config.VerificationKeyId();
VerificationKeyVersion = config.VerificationKeyVersion();
VerificationKeySecret = config.VerificationKeySecret();
var key = Convert.FromBase64String(VerificationKeySecret);
VerificationKey = ECDsa.Create();
int read;
VerificationKey.ImportECPrivateKey(key, out read);
VerificationKeyGenerator = System.Security.Cryptography.X509Certificates.X509SignatureGenerator.CreateForECDsa(VerificationKey);
}
public static ECDsa LoadKey(this byte[] priv)
{
ECCurve curve = ECCurve.NamedCurves.nistP256;
ECDsa key = ECDsa.Create(curve);
key.ImportECPrivateKey(priv, out _);
//new ECParameters
//{
// Curve = curve,
// D = priv,
// Q = new ECPoint
// {
// X = null,
// Y = null,
// },
//});
//key.ImportECPrivateKey(priv, out _);
return(key);
}
public void ExportRSAPrivateKey(AsnFormat format)
{
using ECDsa ecdsa = ECDsa.Create(ECCurve.NamedCurves.nistP256);
byte[] exported = ecdsa.ExportECPrivateKey(format);
if (format == AsnFormat.Der)
{
using ECDsa ecdsaImport = ECDsa.Create();
ecdsaImport.ImportECPrivateKey(exported, out _);
}
if (format == AsnFormat.Pem)
{
using MemoryStream ms = new MemoryStream(exported);
using TextReader tr = new StreamReader(ms, Encoding.ASCII);
PemReader pemReader = new PemReader(tr);
object obj = pemReader.ReadObject();
Assert.IsNotNull(obj);
}
this.CheckFormat(format, exported);
}
public void Initialize_key_Pair()
{
if (File.Exists("Keys/PUBkey.txt"))
{
Console.WriteLine("retreiving keys");
using (FileStream fspub = File.OpenRead("Keys/PUBkey.txt"))
using (FileStream fsprv = File.OpenRead("Keys/PRVkey.txt"))
{
PublicKey = new byte[fspub.Length];
private_key = new byte[fsprv.Length];
fspub.Read(PublicKey, 0, PublicKey.Length);
fsprv.Read(PrivateKey, 0, PrivateKey.Length);
//import the keys to the current ECDSA object
int bytes, bytes2 = 0;
Span <byte> imported_prv_key = new Span <byte>(PrivateKey);
Span <byte> imported_pub_key = new Span <byte>(PublicKey);
Ecc.ImportECPrivateKey(imported_prv_key, out bytes);
Ecc.ImportSubjectPublicKeyInfo(imported_pub_key, out bytes2);
}
}
else
{
Console.WriteLine("creating new keys");
using (FileStream fspub = File.Create("Keys/PUBkey.txt"))
using (FileStream fsprv = File.Create("Keys/PRVkey.txt"))
{
PublicKey = Ecc.ExportSubjectPublicKeyInfo();
private_key = Ecc.ExportECPrivateKey();
fspub.Write(PublicKey, 0, PublicKey.Length);
fsprv.Write(PrivateKey, 0, PrivateKey.Length);
}
}
}