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|---|---|---|
| @@ -0,0 +1,85 @@ | ||
| // Copyright 2021-present Etherna Sagl | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| using System; | ||
| using System.Security.Cryptography; | ||
| using System.Text; | ||
|
|
||
| namespace Etherna.SSOServer.Domain.Models | ||
| { | ||
| public class ApiKey : EntityModelBase<string> | ||
| { | ||
| // Consts. | ||
| public const int KeyLength = 64; | ||
| public const string KeyValidChars = "0123456789" + "abcdefghijklmnopqrstuvwxyz" + "ABCDEFGHIJKLMNOPQRSTUVWXYZ"; | ||
| public const int LabelMaxLength = 25; | ||
| public const int MaxKeysPerUser = 10; | ||
|
|
||
| // Static fields. | ||
| private static readonly SHA256 sha256Encoder = SHA256.Create(); | ||
|
|
||
| // Constructors. | ||
| public ApiKey( | ||
| string plainKey, | ||
| string label, | ||
| DateTime? endOfLife, | ||
| UserBase owner) | ||
| { | ||
| if (string.IsNullOrEmpty(plainKey)) | ||
| throw new ArgumentException($"'{nameof(plainKey)}' cannot be null or empty.", nameof(plainKey)); | ||
| if (string.IsNullOrWhiteSpace(label)) | ||
| throw new ArgumentException($"'{nameof(label)}' cannot be null or whitespace.", nameof(label)); | ||
| if (label.Length > LabelMaxLength) | ||
| throw new ArgumentException($"'{nameof(label)}' cannot be longer than {LabelMaxLength}.", nameof(label)); | ||
|
|
||
| EndOfLife = endOfLife; | ||
| KeyHash = HashKey(plainKey); | ||
| Label = label; | ||
| Owner = owner ?? throw new ArgumentNullException(nameof(owner)); | ||
| } | ||
| #pragma warning disable CS8618 // Non-nullable field must contain a non-null value when exiting constructor. Consider declaring as nullable. | ||
| protected ApiKey() { } | ||
| #pragma warning restore CS8618 // Non-nullable field must contain a non-null value when exiting constructor. Consider declaring as nullable. | ||
|
|
||
| // Properties. | ||
| public virtual DateTime? EndOfLife { get; protected set; } | ||
| public virtual bool IsAlive => EndOfLife is null || DateTime.UtcNow <= EndOfLife; | ||
| public virtual byte[] KeyHash { get; protected set; } | ||
| public virtual string Label { get; protected set; } | ||
| public virtual UserBase Owner { get; protected set; } | ||
|
|
||
| // Helpers. | ||
| public static string GetPrettyPrintedPlainKey(string plainKey, UserBase owner) | ||
| { | ||
| if (plainKey is null) | ||
| throw new ArgumentNullException(nameof(plainKey)); | ||
| if (owner is null) | ||
| throw new ArgumentNullException(nameof(owner)); | ||
|
|
||
| return $"{owner.Id}:{plainKey}"; | ||
| } | ||
|
|
||
| public static string GetRandomPlainKey() | ||
| { | ||
| var codeBuilder = new StringBuilder(); | ||
| for (int i = 0; i < KeyLength; i++) | ||
| codeBuilder.Append(KeyValidChars[RandomNumberGenerator.GetInt32(KeyValidChars.Length)]); | ||
|
|
||
| return codeBuilder.ToString(); | ||
| } | ||
|
|
||
| public static byte[] HashKey(string plainKey) => | ||
| sha256Encoder.ComputeHash(Encoding.UTF8.GetBytes(plainKey)); | ||
| } | ||
| } |
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