Collective work for Release Candidate 1 #99

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Draft

d2dyno1 wants to merge 91 commits into master from f_intro

+11,624 −2,299

SecureFolderFS.sln

-Original file line number
+Diff line change
@@ Expand Up @@
     EndProject
     Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SecureFolderFS.Cli", "src\Platforms\SecureFolderFS.Cli\SecureFolderFS.Cli.csproj", "{A9219707-C494-4D3B-8123-43652707B516}"
     EndProject
+    Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SecureFolderFS.Sdk.PhoneLink", "src\Sdk\SecureFolderFS.Sdk.PhoneLink\SecureFolderFS.Sdk.PhoneLink.csproj", "{85FE77EA-9F89-4F42-BD79-26C82F847DDC}"
+    EndProject
     Global
     	GlobalSection(SolutionConfigurationPlatforms) = preSolution
     		Debug|Any CPU = Debug|Any CPU
@@ Expand Down Expand Up / @@ -504,6 +506,22 @@ Global @@
     		{A9219707-C494-4D3B-8123-43652707B516}.Release|x64.Build.0 = Release|Any CPU
     		{A9219707-C494-4D3B-8123-43652707B516}.Release|x86.ActiveCfg = Release|Any CPU
     		{A9219707-C494-4D3B-8123-43652707B516}.Release|x86.Build.0 = Release|Any CPU
+    		{85FE77EA-9F89-4F42-BD79-26C82F847DDC}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+    		{85FE77EA-9F89-4F42-BD79-26C82F847DDC}.Debug|Any CPU.Build.0 = Debug|Any CPU
+    		{85FE77EA-9F89-4F42-BD79-26C82F847DDC}.Debug|arm64.ActiveCfg = Debug|Any CPU
+    		{85FE77EA-9F89-4F42-BD79-26C82F847DDC}.Debug|arm64.Build.0 = Debug|Any CPU
+    		{85FE77EA-9F89-4F42-BD79-26C82F847DDC}.Debug|x64.ActiveCfg = Debug|Any CPU
+    		{85FE77EA-9F89-4F42-BD79-26C82F847DDC}.Debug|x64.Build.0 = Debug|Any CPU
+    		{85FE77EA-9F89-4F42-BD79-26C82F847DDC}.Debug|x86.ActiveCfg = Debug|Any CPU
+    		{85FE77EA-9F89-4F42-BD79-26C82F847DDC}.Debug|x86.Build.0 = Debug|Any CPU
+    		{85FE77EA-9F89-4F42-BD79-26C82F847DDC}.Release|Any CPU.ActiveCfg = Release|Any CPU
+    		{85FE77EA-9F89-4F42-BD79-26C82F847DDC}.Release|Any CPU.Build.0 = Release|Any CPU
+    		{85FE77EA-9F89-4F42-BD79-26C82F847DDC}.Release|arm64.ActiveCfg = Release|Any CPU
+    		{85FE77EA-9F89-4F42-BD79-26C82F847DDC}.Release|arm64.Build.0 = Release|Any CPU
+    		{85FE77EA-9F89-4F42-BD79-26C82F847DDC}.Release|x64.ActiveCfg = Release|Any CPU
+    		{85FE77EA-9F89-4F42-BD79-26C82F847DDC}.Release|x64.Build.0 = Release|Any CPU
+    		{85FE77EA-9F89-4F42-BD79-26C82F847DDC}.Release|x86.ActiveCfg = Release|Any CPU
+    		{85FE77EA-9F89-4F42-BD79-26C82F847DDC}.Release|x86.Build.0 = Release|Any CPU
     	EndGlobalSection
     	GlobalSection(SolutionProperties) = preSolution
     		HideSolutionNode = FALSE
@@ Expand Down Expand Up / @@ -539,6 +557,7 @@ Global @@
     		{79C128B4-DD9D-4BAC-AA81-9BFAD02ECDD3} = {086CDAC6-2730-4F09-BA28-B41F737E6C4D}
     		{F56308B3-01B8-489B-ABE2-69F35FC5A7DE} = {F2ACE2B7-1599-4769-8FF4-41FA03B25D26}
     		{A9219707-C494-4D3B-8123-43652707B516} = {66BC1E2B-D99A-49E2-8B8F-EF7851493CB0}
+    		{85FE77EA-9F89-4F42-BD79-26C82F847DDC} = {086CDAC6-2730-4F09-BA28-B41F737E6C4D}
     	EndGlobalSection
     	GlobalSection(ExtensibilityGlobals) = postSolution
     		SolutionGuid = {A1906FD8-BB54-4688-BC0F-9ED7532D2CB0}
@@ Expand Down @@

global.json

-Original file line number
+Diff line change
@@ -1,5 +1,5 @@
     {
       "msbuild-sdks": {
-        "Uno.Sdk": "6.0.96"
+        "Uno.Sdk": "6.4.24"
       }
     }

lib/nwebdav

Submodule nwebdav updated 41 files

+0 −28		NWebDav.Server/Extensions/DavStorageExtensions.Folder.cs
+0 −24		NWebDav.Server/Extensions/StoreExtensions.cs
+5 −4		NWebDav.Server/Handlers/CopyHandler.cs
+26 −12		NWebDav.Server/Handlers/DeleteHandler.cs
+8 −7		NWebDav.Server/Handlers/GetAndHeadHandler.cs
+11 −2		NWebDav.Server/Handlers/MkcolHandler.cs
+31 −16		NWebDav.Server/Handlers/MoveHandler.cs
+11 −9		NWebDav.Server/Handlers/PropFindHandler.cs
+69 −23		NWebDav.Server/Handlers/PutHandler.cs
+14 −14		NWebDav.Server/Locking/BaseLockingManager.cs
+8 −8		NWebDav.Server/Locking/ILockingManager.cs
+10 −10		NWebDav.Server/Locking/InMemoryLockingManager.cs
+12 −12		NWebDav.Server/Props/DavExtCollectionProperties.cs
+2 −2		NWebDav.Server/Props/DavProperty.cs
+11 −11		NWebDav.Server/Props/DavTypedProperties.cs
+5 −5		NWebDav.Server/Props/DefaultLockingProperties.cs
+3 −3		NWebDav.Server/Props/IPropertyManager.cs
+6 −6		NWebDav.Server/Props/OverridePropertyManager.cs
+5 −5		NWebDav.Server/Props/PropertyManager.cs
+3 −3		NWebDav.Server/Props/QuotaProperties.cs
+12 −12		NWebDav.Server/Props/StandardProperties.cs
+5 −5		NWebDav.Server/Props/Win32Properties.cs
+245 −0		NWebDav.Server/Storage/BackedDavFile.cs
+426 −0		NWebDav.Server/Storage/BackedDavFolder.cs
+145 −0		NWebDav.Server/Storage/BackedDavStore.cs
+0 −21		NWebDav.Server/Storage/DavFile.cs
+0 −111		NWebDav.Server/Storage/DavFolder.cs
+0 −52		NWebDav.Server/Storage/DavStorable.cs
+2 −1		NWebDav.Server/Storage/IDavFile.cs
+11 −3		NWebDav.Server/Storage/IDavFolder.cs
+14 −1		NWebDav.Server/Storage/IDavStorable.cs
+98 −0		NWebDav.Server/Storage/LengthLimitedStream.cs
+8 −7		NWebDav.Server/Stores/DiskStore.cs
+126 −102		NWebDav.Server/Stores/DiskStoreCollection.cs
+66 −48		NWebDav.Server/Stores/DiskStoreFile.cs
+3 −2		NWebDav.Server/Stores/IStore.cs
+0 −34		NWebDav.Server/Stores/IStoreCollection.cs
+0 −15		NWebDav.Server/Stores/IStoreFile.cs
+0 −20		NWebDav.Server/Stores/IStoreItem.cs
+5 −4		NWebDav.Server/Stores/RootDiskStore.cs
+3 −2		NWebDav.Server/Stores/StoreResult.cs

src/Core/SecureFolderFS.Core.Cryptography/Cipher/AesSiv128.cs

-Original file line number
+Diff line change
@@ Expand Up @@
                 macKey.CopyTo(longKeySpan.Slice(dekKey.Length));
                 var aesCmacSiv = Aead.CreateAesCmacSiv(longKey);
                 return new AesSiv128(aesCmacSiv);
             }
@@ Expand Down @@

src/Core/SecureFolderFS.Core.Cryptography/Constants.cs

-Original file line number
+Diff line change
@@ Expand Up / @@ -9,8 +9,10 @@ public static class KeyTraits @@
                 public const int DEK_KEY_LENGTH = 32;
                 public const int MAC_KEY_LENGTH = 32;
                 public const int ARGON2_KEK_LENGTH = 32;
-                public const int CHALLENGE_KEY_PART_LENGTH = 128;
+                public const int CHALLENGE_KEY_PART_LENGTH_64 = 64;
+                public const int CHALLENGE_KEY_PART_LENGTH_128 = 128;
                 public const int ECIES_SHA256_AESGCM_STDX963_KEY_LENGTH = 32;
+                public const int HMAC_SHA1_HASH_LENGTH = 20;
             }
             public static class CipherId
@@ Expand Down @@

src/Core/SecureFolderFS.Core.Cryptography/ContentCrypt/AesCtrHmacContentCrypt.cs

            
                      Original file line number
                      Diff line number
                      Diff line change
                  
    @@ -3,6 +3,7 @@
  
    using System;

    using System.Runtime.CompilerServices;

    using System.Security.Cryptography;

    using SecureFolderFS.Shared.ComponentModel;

    using static SecureFolderFS.Core.Cryptography.Constants.Crypto.Chunks.AesCtrHmac;

    using static SecureFolderFS.Core.Cryptography.Extensions.ContentCryptExtensions.AesCtrHmacContentExtensions;

    using static SecureFolderFS.Core.Cryptography.Extensions.HeaderCryptExtensions.AesCtrHmacHeaderExtensions;

    @@ -12,7 +13,7 @@ namespace SecureFolderFS.Core.Cryptography.ContentCrypt
  
        /// <inheritdoc cref="IContentCrypt"/>

        internal sealed class AesCtrHmacContentCrypt : BaseContentCrypt

        {

            private readonly SecretKey _macKey;

            private readonly IKeyUsage _macKey;

            /// <inheritdoc/>

            public override int ChunkPlaintextSize { get; } = CHUNK_PLAINTEXT_SIZE;

    @@ -23,16 +24,17 @@ internal sealed class AesCtrHmacContentCrypt : BaseContentCrypt
  
            /// <inheritdoc/>

            public override int ChunkFirstReservedSize { get; } = CHUNK_NONCE_SIZE;

            public AesCtrHmacContentCrypt(SecretKey macKey)

            public AesCtrHmacContentCrypt(IKeyUsage macKey)

            {

                _macKey = macKey;

            }

            /// <inheritdoc/>

            public override void EncryptChunk(ReadOnlySpan<byte> plaintextChunk, long chunkNumber, ReadOnlySpan<byte> header, Span<byte> ciphertextChunk)

            [SkipLocalsInit]

            public override unsafe void EncryptChunk(ReadOnlySpan<byte> plaintextChunk, long chunkNumber, ReadOnlySpan<byte> header, Span<byte> ciphertextChunk)

            {

                // Chunk nonce

                secureRandom.GetBytes(ciphertextChunk.Slice(0, CHUNK_NONCE_SIZE));

                RandomNumberGenerator.Fill(ciphertextChunk.Slice(0, CHUNK_NONCE_SIZE));

                // Encrypt

                AesCtr128.Encrypt(

    @@ -41,34 +43,75 @@ public override void EncryptChunk(ReadOnlySpan<byte> plaintextChunk, long chunkN
  
                    ciphertextChunk.Slice(0, CHUNK_NONCE_SIZE),

                    ciphertextChunk.Slice(CHUNK_NONCE_SIZE, plaintextChunk.Length));

                // Calculate MAC

                CalculateChunkMac(

                    header.GetHeaderNonce(),

                    ciphertextChunk.Slice(0, CHUNK_NONCE_SIZE),

                    ciphertextChunk.Slice(CHUNK_NONCE_SIZE, plaintextChunk.Length),

                    chunkNumber,

                    ciphertextChunk.Slice(CHUNK_NONCE_SIZE + plaintextChunk.Length, CHUNK_MAC_SIZE));

                // Calculate MAC using UseKey pattern

                fixed (byte* headerPtr = header)

                fixed (byte* ciphertextPtr = ciphertextChunk)

                {

                    var state = (

                        headerPtr: (nint)headerPtr,

                        headerLen: header.Length,

                        ctPtr: (nint)ciphertextPtr,

                        ctLen: ciphertextChunk.Length,

                        ptLen: plaintextChunk.Length,

                        chunkNumber

                    );

                    _macKey.UseKey(state, static (macKey, s) =>

                    {

                        var hdr = new ReadOnlySpan<byte>((byte*)s.headerPtr, s.headerLen);

                        var ct = new Span<byte>((byte*)s.ctPtr, s.ctLen);

                        CalculateChunkMacStatic(

                            macKey,

                            hdr.GetHeaderNonce(),

                            ct.Slice(0, CHUNK_NONCE_SIZE),

                            ct.Slice(CHUNK_NONCE_SIZE, s.ptLen),

                            s.chunkNumber,

                            ct.Slice(CHUNK_NONCE_SIZE + s.ptLen, CHUNK_MAC_SIZE));

                    });

                }

            }

            /// <inheritdoc/>

            [SkipLocalsInit]

            public override bool DecryptChunk(ReadOnlySpan<byte> ciphertextChunk, long chunkNumber,

                ReadOnlySpan<byte> header, Span<byte> plaintextChunk)

            public override unsafe bool DecryptChunk(ReadOnlySpan<byte> ciphertextChunk, long chunkNumber, ReadOnlySpan<byte> header, Span<byte> plaintextChunk)

            {

                // Allocate byte* for MAC

                Span<byte> mac = stackalloc byte[CHUNK_MAC_SIZE];

                // Calculate MAC

                CalculateChunkMac(

                    header.GetHeaderNonce(),

                    ciphertextChunk.GetChunkNonce(),

                    ciphertextChunk.GetChunkPayload(),

                    chunkNumber,

                    mac);

                // Check MAC

                if (!mac.SequenceEqual(ciphertextChunk.GetChunkMac()))

                    return false;

                // Verify MAC using UseKey pattern

                fixed (byte* headerPtr = header)

                fixed (byte* ciphertextPtr = ciphertextChunk)

                {

                    var state = (

                        headerPtr: (nint)headerPtr,

                        headerLen: header.Length,

                        ctPtr: (nint)ciphertextPtr,

                        ctLen: ciphertextChunk.Length,

                        chunkNumber

                    );

                    var macValid = _macKey.UseKey(state, static (macKey, s) =>

                    {

                        var hdr = new ReadOnlySpan<byte>((byte*)s.headerPtr, s.headerLen);

                        var ct = new ReadOnlySpan<byte>((byte*)s.ctPtr, s.ctLen);

                        // Allocate byte* for MAC

                        Span<byte> mac = stackalloc byte[CHUNK_MAC_SIZE];

                        // Calculate MAC

                        CalculateChunkMacStatic(

                            macKey,

                            hdr.GetHeaderNonce(),

                            ct.GetChunkNonce(),

                            ct.GetChunkPayload(),

                            s.chunkNumber,

                            mac);

                        // Check MAC using constant-time comparison to prevent timing attacks

                        return CryptographicOperations.FixedTimeEquals(mac, ct.GetChunkMac());

                    });

                    if (!macValid)

                        return false;

                }

                // Decrypt

                AesCtr128.Decrypt(

    @@ -81,7 +124,7 @@ public override bool DecryptChunk(ReadOnlySpan<byte> ciphertextChunk, long chunk
  
            }

            [SkipLocalsInit]

            private void CalculateChunkMac(ReadOnlySpan<byte> headerNonce, ReadOnlySpan<byte> chunkNonce, ReadOnlySpan<byte> ciphertextPayload, long chunkNumber, Span<byte> chunkMac)

            private static void CalculateChunkMacStatic(ReadOnlySpan<byte> macKey, ReadOnlySpan<byte> headerNonce, ReadOnlySpan<byte> chunkNonce, ReadOnlySpan<byte> ciphertextPayload, long chunkNumber, Span<byte> chunkMac)

            {

                // Convert long to byte array

                Span<byte> beChunkNumber = stackalloc byte[sizeof(long)];

    @@ -92,12 +135,12 @@ private void CalculateChunkMac(ReadOnlySpan<byte> headerNonce, ReadOnlySpan<byte
  
                    beChunkNumber.Reverse();

                // Initialize HMAC

                using var hmacSha256 = IncrementalHash.CreateHMAC(HashAlgorithmName.SHA256, _macKey);

                using var hmacSha256 = IncrementalHash.CreateHMAC(HashAlgorithmName.SHA256, macKey);

                hmacSha256.AppendData(headerNonce);         // headerNonce

                hmacSha256.AppendData(beChunkNumber);       // beChunkNumber

                hmacSha256.AppendData(chunkNonce);          // chunkNonce

                hmacSha256.AppendData(ciphertextPayload);   // ciphertextPayload   

                hmacSha256.AppendData(ciphertextPayload);   // ciphertextPayload

                hmacSha256.GetCurrentHash(chunkMac);

            }

src/Core/SecureFolderFS.Core.Cryptography/ContentCrypt/AesGcmContentCrypt.cs

            
                      Original file line number
                      Diff line number
                      Diff line change
                  
    @@ -2,6 +2,7 @@
  
    using SecureFolderFS.Core.Cryptography.Helpers;

    using System;

    using System.Runtime.CompilerServices;

    using System.Security.Cryptography;

    using static SecureFolderFS.Core.Cryptography.Constants.Crypto.Chunks.AesGcm;

    using static SecureFolderFS.Core.Cryptography.Constants.Crypto.Headers.AesGcm;

    using static SecureFolderFS.Core.Cryptography.Extensions.ContentCryptExtensions.AesGcmContentExtensions;

    @@ -26,11 +27,11 @@ internal sealed class AesGcmContentCrypt : BaseContentCrypt
  
            public override void EncryptChunk(ReadOnlySpan<byte> plaintextChunk, long chunkNumber, ReadOnlySpan<byte> header, Span<byte> ciphertextChunk)

            {

                // Chunk nonce

                secureRandom.GetBytes(ciphertextChunk.Slice(0, CHUNK_NONCE_SIZE));

                RandomNumberGenerator.Fill(ciphertextChunk.Slice(0, CHUNK_NONCE_SIZE));

                // Big Endian chunk number and file header nonce

                Span<byte> associatedData = stackalloc byte[sizeof(long) + HEADER_NONCE_SIZE];

                CryptHelpers.FillAssociatedDataBe(associatedData, header.GetHeaderNonce(), chunkNumber);

                CryptHelpers.FillAssociatedDataBigEndian(associatedData, header.GetHeaderNonce(), chunkNumber);

                // Encrypt

                AesGcm128.Encrypt(

    @@ -48,7 +49,7 @@ public override bool DecryptChunk(ReadOnlySpan<byte> ciphertextChunk, long chunk
  
            {

                // Big Endian chunk number and file header nonce

                Span<byte> associatedData = stackalloc byte[sizeof(long) + HEADER_NONCE_SIZE];

                CryptHelpers.FillAssociatedDataBe(associatedData, header.GetHeaderNonce(), chunkNumber);

                CryptHelpers.FillAssociatedDataBigEndian(associatedData, header.GetHeaderNonce(), chunkNumber);

                // Decrypt

                return AesGcm128.TryDecrypt(

src/Core/SecureFolderFS.Core.Cryptography/ContentCrypt/BaseContentCrypt.cs

-Original file line number
+Diff line change
@@ Expand Up / @@ -6,8 +6,6 @@ namespace SecureFolderFS.Core.Cryptography.ContentCrypt @@
         /// <inheritdoc cref="IContentCrypt"/>
         internal abstract class BaseContentCrypt : IContentCrypt
         {
-            protected readonly RandomNumberGenerator secureRandom;
             /// <inheritdoc/>
             public abstract int ChunkPlaintextSize { get; }
@@ Expand All / @@ -17,11 +15,6 @@ internal abstract class BaseContentCrypt : IContentCrypt @@
             /// <inheritdoc/>
             public abstract int ChunkFirstReservedSize { get; }
-            protected BaseContentCrypt()
-            {
-                secureRandom = RandomNumberGenerator.Create();
-            }
             /// <inheritdoc/>
             public abstract void EncryptChunk(ReadOnlySpan<byte> plaintextChunk, long chunkNumber, ReadOnlySpan<byte> header, Span<byte> ciphertextChunk);
@@ Expand Down Expand Up @@
             /// <inheritdoc/>
             public virtual void Dispose()
             {
-                secureRandom.Dispose();
             }
         }
     }

src/Core/SecureFolderFS.Core.Cryptography/ContentCrypt/XChaChaContentCrypt.cs

            
                      Original file line number
                      Diff line number
                      Diff line change
                  
    @@ -2,6 +2,7 @@
  
    using SecureFolderFS.Core.Cryptography.Helpers;

    using System;

    using System.Runtime.CompilerServices;

    using System.Security.Cryptography;

    using static SecureFolderFS.Core.Cryptography.Constants.Crypto.Chunks.XChaCha20Poly1305;

    using static SecureFolderFS.Core.Cryptography.Constants.Crypto.Headers.XChaCha20Poly1305;

    using static SecureFolderFS.Core.Cryptography.Extensions.ContentCryptExtensions.XChaChaContentExtensions;

    @@ -26,11 +27,11 @@ internal sealed class XChaChaContentCrypt : BaseContentCrypt
  
            public override void EncryptChunk(ReadOnlySpan<byte> plaintextChunk, long chunkNumber, ReadOnlySpan<byte> header, Span<byte> ciphertextChunk)

            {

                // Chunk nonce

                secureRandom.GetBytes(ciphertextChunk.Slice(0, CHUNK_NONCE_SIZE));

                RandomNumberGenerator.Fill(ciphertextChunk.Slice(0, CHUNK_NONCE_SIZE));

                // Big Endian chunk number and file header nonce

                Span<byte> associatedData = stackalloc byte[sizeof(long) + HEADER_NONCE_SIZE];

                CryptHelpers.FillAssociatedDataBe(associatedData, header.GetHeaderNonce(), chunkNumber);

                CryptHelpers.FillAssociatedDataBigEndian(associatedData, header.GetHeaderNonce(), chunkNumber);

                // Encrypt

                XChaCha20Poly1305.Encrypt(

    @@ -48,7 +49,7 @@ public override unsafe bool DecryptChunk(ReadOnlySpan<byte> ciphertextChunk, lon
  
            {

                // Big Endian chunk number and file header nonce

                Span<byte> associatedData = stackalloc byte[sizeof(long) + HEADER_NONCE_SIZE];

                CryptHelpers.FillAssociatedDataBe(associatedData, header.GetHeaderNonce(), chunkNumber);

                CryptHelpers.FillAssociatedDataBigEndian(associatedData, header.GetHeaderNonce(), chunkNumber);

                // Decrypt

                return XChaCha20Poly1305.Decrypt(

src/Core/SecureFolderFS.Core.Cryptography/Extensions/KeyExtensions.cs

-Original file line number
+Diff line change
@@ -0,0 +1,40 @@
+    using System;
+    using SecureFolderFS.Core.Cryptography.SecureStore;
+    using SecureFolderFS.Shared.ComponentModel;
+    namespace SecureFolderFS.Core.Cryptography.Extensions
+    {
+        /// <summary>
+        /// Provides extension methods for the <see cref="ManagedKey"/> class.
+        /// </summary>
+        public static class KeyExtensions
+        {
+            /// <summary>
+            /// Creates a copy of the specified <see cref="IKeyBytes"/> instance if it is cloneable.
+            /// </summary>
+            /// <param name="originalKey">The original <see cref="IKeyBytes"/> to copy.</param>
+            /// <returns>A new copy of the <see cref="IKeyBytes"/>.</returns>
+            public static TKey CreateCopy<TKey>(this TKey originalKey)
+                where TKey : IKeyUsage
+            {
+                if (originalKey is ICloneable cloneableKey)
+                    return (TKey)cloneableKey.Clone();
+                throw new NotSupportedException("The provided key instance is not cloneable.");
+            }
+            /// <summary>
+            /// Creates a unique copy of the specified <typeparamref name="TKey"/> and disposes the original key.
+            /// </summary>
+            /// <param name="originalKey">The original <typeparamref name="TKey"/> to copy.</param>
+            /// <returns>A new copy of the key.</returns>
+            public static TKey CreateUniqueCopy<TKey>(this TKey originalKey)
+                where TKey : IKeyUsage
+            {
+                var copiedKey = originalKey.CreateCopy();
+                originalKey.Dispose();
+                return copiedKey;
+            }
+        }
+    }

src/Core/SecureFolderFS.Core.Cryptography/Extensions/SecretKeyExtensions.cs

This file was deleted.

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