refactor(CryptographParams): umbenannt in CryptoFactoryParams

DigitalData.Core.Security/Config/CryptoFactoryParams.cs

@@ -0,0 +1,94 @@
+using DigitalData.Core.Security.RSAKey;
+
+namespace DigitalData.Core.Security.Config
+{
+    public class CryptoFactoryParams : RSAFactoryParams
+    {
+        public string PemDirectory { get; init; } = string.Empty;
+
+        /// <summary>
+        /// Represents the separator used to concatenate the components of a file-related token string.
+        /// </summary>
+        /// <remarks>
+        /// The resulting file-related token string is constructed as follows:
+        /// <c>string.Join(FileNameSeparator, Issuer, Audience, Secret_version)</c>.
+        /// If <c>Secret_version</c> is not null, it will be included in the concatenation.
+        /// </remarks>
+        /// <example>
+        /// For example, if <c>FileNameSeparator = "_-_"</c>, the output might look like:
+        /// <c>"Issuer_-_Audience_-_Secret_version"</c>.
+        /// </example>
+        public string FileNameSeparator { get; init; } = "_-_";
+
+        public string FileExtension { get; init; } = "pem";
+
+        /// <summary>
+        ///This is the subtext of the pem file name. For the file to be automatically renewed, the name must be assigned to change periodically. For example, by default MM/2 will be refreshed every 2 months.
+        /// <br />
+        /// - <see cref="StringExtensions.ToTag(DateTime, string)" /> is used when converting to tag.
+        /// <br />
+        /// - If the format contains the symbol “//”, the method divides the numeric value obtained from the left side of the format
+        ///   by one minus the numeric value obtained from the right side of the format string and adds one. For instance:
+        /// <br />
+        /// - If the date is 02.03.2024 and the format is "MM//2", it extracts the month (02), subtracts one (3), divides it by 2,
+        ///   rounds down the outgoing number (1), adds one to the number (resulting in 2).
+        ///   <br />
+        /// - If the format does not contain "//", the method uses the default <see cref="DateTime.ToString"/> format.
+        /// <br />
+        /// This method provides a way to format the date based on typical or customized rules, including mathematical operations like division.
+        /// </summary>
+        public string DateTagFormat { get; init; } = "MM//2";
+
+        public IEnumerable<RSADecryptor> Decryptors { get; init; } = new List<RSADecryptor>();
+
+        public IEnumerable<RSATokenDescriptor> TokenDescriptors { get; init; } = new List<RSATokenDescriptor>();
+
+        public RSADecryptor? VaultDecryptor { get; init; }
+
+        public CryptoFactoryParams()
+        {
+            // init decryptors
+            AfterCreate += () =>
+            {
+                // Create root folder if it does not exist
+                if (!Directory.Exists(PemDirectory))
+                    Directory.CreateDirectory(PemDirectory);
+
+                var privateKeys = new List<RSAPrivateKey>();
+                privateKeys.AddRange(Decryptors);
+                privateKeys.AddRange(TokenDescriptors);
+                if (VaultDecryptor is not null)
+                    privateKeys.Add(VaultDecryptor);
+
+                foreach (var privateKey in privateKeys)
+                {
+                    // set default path
+                    if (privateKey.IsPemNull)
+                    {
+                        var file_name_params = new List<object> { privateKey.Issuer, privateKey.Audience, KeySizeInBits, DateTime.Now.ToTag(DateTagFormat) };
+                        if (privateKey.IsEncrypted)
+                            file_name_params.Add(Secrets.Version);
+
+                        var file_name = $"{string.Join(FileNameSeparator, file_name_params)}.{FileExtension}";
+
+                        var path = Path.Combine(PemDirectory, file_name);
+
+                        if (File.Exists(path))
+                            privateKey.SetPem(File.ReadAllText(path));
+                        else
+                        {
+                            var pem = privateKey.IsEncrypted
+                                ? Instance.RSAFactory.CreateEncryptedPrivateKeyPem(pbeParameters: PbeParameters, keySizeInBits: KeySizeInBits, password: Secrets.PBE_PASSWORD)
+                                : Instance.RSAFactory.CreatePrivateKeyPem(keySizeInBits: KeySizeInBits);
+
+                            privateKey.SetPem(pem);
+
+                            // Save file in background
+                            Task.Run(async () => await File.WriteAllTextAsync(path: path, pem));
+                        }
+                    }
+                }
+            };
+        }
+    }
+}