public bool Verify([ReadOnlyArray] byte[] signature, [ReadOnlyArray] byte[] securedInput, object key)
{
var publicKey = Ensure.Type <ICryptographicKey>(key, "RsaUsingSha expects key to be of type 'ICryptographicKey'");
//reattach key to alg provider
byte[] keyBlob = publicKey.ExportPublicKey(CryptographicPublicKeyBlobType.Pkcs1RsaPublicKey);
ICryptographicKey cKey = AlgProvider.ImportPublicKey(keyBlob, CryptographicPublicKeyBlobType.Pkcs1RsaPublicKey);
return(WinRTCrypto.CryptographicEngine.VerifySignature(cKey, securedInput, signature));
}
public bool Verify([ReadOnlyArray] byte[] signature, [ReadOnlyArray] byte[] securedInput, object key)
{
var publicKey = Ensure.Type <CryptographicKey>(key, "EcdsaUsingSha expects key to be of type 'CryptographicKey'");
IBuffer msg = CryptographicBuffer.CreateFromByteArray(securedInput);
IBuffer sig = CryptographicBuffer.CreateFromByteArray(signature);
//reattach key to alg provider
IBuffer keyBlob = publicKey.ExportPublicKey(CryptographicPublicKeyBlobType.BCryptPublicKey);
CryptographicKey cKey = AlgProvider.ImportPublicKey(keyBlob, CryptographicPublicKeyBlobType.BCryptPublicKey);
return(CryptographicEngine.VerifySignature(cKey, msg, sig));
}
public Part[] WrapNewKey(uint cekSizeBits, object key, JsonObject header)
{
var publicKey = Ensure.Type <CryptographicKey>(key, "RsaUsingSha expects key to be of type 'CryptographicKey'");
IBuffer cek = CryptographicBuffer.GenerateRandom(cekSizeBits >> 3);
//reattach key to alg provider
IBuffer keyBlob = publicKey.ExportPublicKey(CryptographicPublicKeyBlobType.BCryptPublicKey);
CryptographicKey cKey = AlgProvider.ImportPublicKey(keyBlob, CryptographicPublicKeyBlobType.BCryptPublicKey);
IBuffer encryptedCek = CryptographicEngine.Encrypt(cKey, cek, null);
return(new [] { new Part(Buffer.ToBytes(cek)), new Part(Buffer.ToBytes(encryptedCek)) });
}