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Improve authentication performance by caching on file system
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Gautam Sheth
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Aug 30, 2024
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86 changes: 86 additions & 0 deletions
86
src/lib/PnP.Framework/Utilities/Cache/MsalCacheHelperUtility.cs
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using Microsoft.Identity.Client.Extensions.Msal; | ||
using System; | ||
using System.Collections.Generic; | ||
using System.IO; | ||
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namespace PnP.Framework.Utilities.Cache | ||
{ | ||
public class MsalCacheHelperUtility | ||
{ | ||
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private static MsalCacheHelper MsalCacheHelper; | ||
private static readonly object ObjectLock = new(); | ||
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private static class Config | ||
{ | ||
// Cache settings | ||
public const string CacheFileName = "m365pnpmsal.cache"; | ||
public readonly static string CacheDir = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), ".M365PnPAuthService"); | ||
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public const string KeyChainServiceName = "M365.PnP.Framework"; | ||
public const string KeyChainAccountName = "M365PnPAuthCache"; | ||
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public const string LinuxKeyRingSchema = "com.m365.pnp.auth.tokencache"; | ||
public const string LinuxKeyRingCollection = MsalCacheHelper.LinuxKeyRingDefaultCollection; | ||
public const string LinuxKeyRingLabel = "MSAL token cache for M365 PnP Framework."; | ||
public static readonly KeyValuePair<string, string> LinuxKeyRingAttr1 = new KeyValuePair<string, string>("Version", "1"); | ||
public static readonly KeyValuePair<string, string> LinuxKeyRingAttr2 = new KeyValuePair<string, string>("Product", "M365PnPAuth"); | ||
} | ||
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public static MsalCacheHelper CreateCacheHelper() | ||
{ | ||
if (MsalCacheHelper == null) | ||
{ | ||
lock (ObjectLock) | ||
{ | ||
if (MsalCacheHelper == null) | ||
{ | ||
StorageCreationProperties storageProperties; | ||
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try | ||
{ | ||
storageProperties = new StorageCreationPropertiesBuilder( | ||
Config.CacheFileName, | ||
Config.CacheDir) | ||
.WithLinuxKeyring( | ||
Config.LinuxKeyRingSchema, | ||
Config.LinuxKeyRingCollection, | ||
Config.LinuxKeyRingLabel, | ||
Config.LinuxKeyRingAttr1, | ||
Config.LinuxKeyRingAttr2) | ||
.WithMacKeyChain( | ||
Config.KeyChainServiceName, | ||
Config.KeyChainAccountName) | ||
.Build(); | ||
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var cacheHelper = MsalCacheHelper.CreateAsync(storageProperties).ConfigureAwait(false).GetAwaiter().GetResult(); | ||
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cacheHelper.VerifyPersistence(); | ||
MsalCacheHelper = cacheHelper; | ||
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} | ||
catch (MsalCachePersistenceException) | ||
{ | ||
// do not use the same file name so as not to overwrite the encrypted version | ||
storageProperties = new StorageCreationPropertiesBuilder( | ||
Config.CacheFileName + ".plaintext", | ||
Config.CacheDir) | ||
.WithUnprotectedFile() | ||
.Build(); | ||
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var cacheHelper = MsalCacheHelper.CreateAsync(storageProperties).ConfigureAwait(false).GetAwaiter().GetResult(); | ||
cacheHelper.VerifyPersistence(); | ||
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MsalCacheHelper = cacheHelper; | ||
} | ||
catch | ||
{ | ||
MsalCacheHelper = null; | ||
} | ||
} | ||
} | ||
} | ||
return MsalCacheHelper; | ||
} | ||
} | ||
} |