private static EncryptionInstructions EncryptEnvelopeKeyUsingAsymmetricKeyPairV2()

in src/EncryptionUtilsV2.cs [150:177]

26 lines of code
3 McCabe index (conditional complexity)


        private static EncryptionInstructions EncryptEnvelopeKeyUsingAsymmetricKeyPairV2(EncryptionMaterialsV2 materials)
        {
            var rsa = materials.AsymmetricProvider as RSA;
            if (rsa == null)
            {
                throw new NotSupportedException("RSA is the only supported algorithm with this method.");
            }

            switch (materials.AsymmetricProviderType)
            {
                case AsymmetricAlgorithmType.RsaOaepSha1:
                {
                    var aesObject = Aes.Create();
                    var nonce = aesObject.IV.Take(DefaultNonceSize).ToArray();
                    var envelopeKeyToEncrypt = EnvelopeKeyForDataKey(aesObject.Key);
                    var cipher = RsaUtils.CreateRsaOaepSha1Cipher(true, rsa);
                    var encryptedEnvelopeKey = cipher.DoFinal(envelopeKeyToEncrypt);

                    var instructions = new EncryptionInstructions(materials.MaterialsDescription, aesObject.Key, encryptedEnvelopeKey, nonce,
                        XAmzWrapAlgRsaOaepSha1, XAmzAesGcmCekAlgValue);
                    return instructions;
                }
                default:
                {
                    throw new NotSupportedException($"{materials.AsymmetricProviderType} isn't supported with AsymmetricProvider");
                }
            }
        }