ssl: Implement SSL connectivity (#2961)

* implement certain servicessl functions

* ssl: Implement more of SSL connection and abstract it

This adds support to non blocking SSL operations and unlink the SSL
implementation from the IPC logic.

* Rename SslDefaultSocketConnection to SslManagedSocketConnection

* Fix regression on Pokemon TV

* Address gdkchan's comment

* Simplify value read from previous commit

* ssl: some changes

- Implement builtin certificates parsing and retrieving
- Fix issues with SSL version handling
- Improve managed SSL socket error handling
- Ensure to only return a certificate on DoHandshake when actually requested

* Add missing BuiltInCertificateManager initialization call

* Address gdkchan's comment

* Address Ack's comment

Co-authored-by: InvoxiPlayGames <webmaster@invoxiplaygames.uk>

Ryujinx.HLE/FileSystem/Content/ContentManager.cs

@@ -10,6 +10,7 @@ using LibHac.Tools.FsSystem.NcaUtils;
 using LibHac.Tools.Ncm;
 using Ryujinx.Common.Logging;
 using Ryujinx.HLE.Exceptions;
+using Ryujinx.HLE.HOS.Services.Ssl;
 using Ryujinx.HLE.HOS.Services.Time;
 using Ryujinx.HLE.Utilities;
 using System;
@@ -195,6 +196,7 @@ namespace Ryujinx.HLE.FileSystem.Content
                 if (device != null)
                 {
                     TimeManager.Instance.InitializeTimeZone(device);
+                    BuiltInCertificateManager.Instance.Initialize(device);
                     device.System.SharedFontManager.Initialize();
                 }
             }

Ryujinx.HLE/HOS/Services/Ssl/BuiltInCertificateManager.cs

@@ -0,0 +1,237 @@
+using LibHac;
+using LibHac.Common;
+using LibHac.Fs;
+using LibHac.Fs.Fsa;
+using LibHac.FsSystem;
+using LibHac.Tools.FsSystem;
+using LibHac.Tools.FsSystem.NcaUtils;
+using Ryujinx.Common.Configuration;
+using Ryujinx.Common.Logging;
+using Ryujinx.HLE.Exceptions;
+using Ryujinx.HLE.FileSystem;
+using Ryujinx.HLE.FileSystem.Content;
+using Ryujinx.HLE.HOS.Services.Ssl.Types;
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.HLE.HOS.Services.Ssl
+{
+    class BuiltInCertificateManager
+    {
+        private const long CertStoreTitleId = 0x0100000000000800;
+
+        private readonly string CertStoreTitleMissingErrorMessage = "CertStore system title not found! SSL CA retrieving will not work, provide the system archive to fix this error. (See https://github.com/Ryujinx/Ryujinx/wiki/Ryujinx-Setup-&-Configuration-Guide#initial-setup-continued---installation-of-firmware for more information)";
+
+        private static BuiltInCertificateManager _instance;
+
+        public static BuiltInCertificateManager Instance
+        {
+            get
+            {
+                if (_instance == null)
+                {
+                    _instance = new BuiltInCertificateManager();
+                }
+
+                return _instance;
+            }
+        }
+
+        private VirtualFileSystem   _virtualFileSystem;
+        private IntegrityCheckLevel _fsIntegrityCheckLevel;
+        private ContentManager      _contentManager;
+        private bool                _initialized;
+        private Dictionary<CaCertificateId, CertStoreEntry> _certificates;
+
+        private object _lock = new object();
+
+        private struct CertStoreFileHeader
+        {
+            private const uint ValidMagic = 0x546C7373;
+
+#pragma warning disable CS0649
+            public uint Magic;
+            public uint EntriesCount;
+#pragma warning restore CS0649
+
+            public bool IsValid()
+            {
+                return Magic == ValidMagic;
+            }
+        }
+
+        private struct CertStoreFileEntry
+        {
+#pragma warning disable CS0649
+            public CaCertificateId Id;
+            public TrustedCertStatus Status;
+            public uint DataSize;
+            public uint DataOffset;
+#pragma warning restore CS0649
+        }
+
+        public class CertStoreEntry
+        {
+            public CaCertificateId Id;
+            public TrustedCertStatus Status;
+            public byte[] Data;
+        }
+
+        public string GetCertStoreTitleContentPath()
+        {
+            return _contentManager.GetInstalledContentPath(CertStoreTitleId, StorageId.NandSystem, NcaContentType.Data);
+        }
+
+        public bool HasCertStoreTitle()
+        {
+            return !string.IsNullOrEmpty(GetCertStoreTitleContentPath());
+        }
+
+        private CertStoreEntry ReadCertStoreEntry(ReadOnlySpan<byte> buffer, CertStoreFileEntry entry)
+        {
+            string customCertificatePath = System.IO.Path.Join(AppDataManager.BaseDirPath, "system", "ssl", $"{entry.Id}.der");
+
+            byte[] data;
+
+            if (File.Exists(customCertificatePath))
+            {
+                data = File.ReadAllBytes(customCertificatePath);
+            }
+            else
+            {
+                data = buffer.Slice((int)entry.DataOffset, (int)entry.DataSize).ToArray();
+            }
+
+            return new CertStoreEntry
+            {
+                Id = entry.Id,
+                Status = entry.Status,
+                Data = data
+            };
+        }
+
+        public void Initialize(Switch device)
+        {
+            lock (_lock)
+            {
+                _certificates = new Dictionary<CaCertificateId, CertStoreEntry>();
+                _initialized = false;
+                _contentManager = device.System.ContentManager;
+                _virtualFileSystem = device.FileSystem;
+                _fsIntegrityCheckLevel = device.System.FsIntegrityCheckLevel;
+
+                if (HasCertStoreTitle())
+                {
+                    using LocalStorage ncaFile = new LocalStorage(_virtualFileSystem.SwitchPathToSystemPath(GetCertStoreTitleContentPath()), FileAccess.Read, FileMode.Open);
+
+                    Nca nca = new Nca(_virtualFileSystem.KeySet, ncaFile);
+
+                    IFileSystem romfs = nca.OpenFileSystem(NcaSectionType.Data, _fsIntegrityCheckLevel);
+
+                    using var trustedCertsFileRef = new UniqueRef<IFile>();
+
+                    Result result = romfs.OpenFile(ref trustedCertsFileRef.Ref(), "/ssl_TrustedCerts.bdf".ToU8Span(), OpenMode.Read);
+
+                    if (!result.IsSuccess())
+                    {
+                        // [1.0.0 - 2.3.0]
+                        if (ResultFs.PathNotFound.Includes(result))
+                        {
+                            result = romfs.OpenFile(ref trustedCertsFileRef.Ref(), "/ssl_TrustedCerts.tcf".ToU8Span(), OpenMode.Read);
+                        }
+
+                        if (result.IsFailure())
+                        {
+                            Logger.Error?.Print(LogClass.ServiceSsl, CertStoreTitleMissingErrorMessage);
+
+                            return;
+                        }
+                    }
+
+                    using IFile trustedCertsFile = trustedCertsFileRef.Release();
+
+                    trustedCertsFile.GetSize(out long fileSize).ThrowIfFailure();
+
+                    Span<byte> trustedCertsRaw = new byte[fileSize];
+
+                    trustedCertsFile.Read(out _, 0, trustedCertsRaw).ThrowIfFailure();
+
+                    CertStoreFileHeader header = MemoryMarshal.Read<CertStoreFileHeader>(trustedCertsRaw);
+
+                    if (!header.IsValid())
+                    {
+                        Logger.Error?.Print(LogClass.ServiceSsl, "Invalid CertStore data found, skipping!");
+
+                        return;
+                    }
+
+                    ReadOnlySpan<byte> trustedCertsData = trustedCertsRaw[Unsafe.SizeOf<CertStoreFileHeader>()..];
+                    ReadOnlySpan<CertStoreFileEntry> trustedCertsEntries = MemoryMarshal.Cast<byte, CertStoreFileEntry>(trustedCertsData)[..(int)header.EntriesCount];
+
+                    foreach (CertStoreFileEntry entry in trustedCertsEntries)
+                    {
+                        _certificates.Add(entry.Id, ReadCertStoreEntry(trustedCertsData, entry));
+                    }
+
+                    _initialized = true;
+                }
+            }
+        }
+
+        public bool TryGetCertificates(ReadOnlySpan<CaCertificateId> ids, out CertStoreEntry[] entries)
+        {
+            lock (_lock)
+            {
+                if (!_initialized)
+                {
+                    throw new InvalidSystemResourceException(CertStoreTitleMissingErrorMessage);
+                }
+
+                bool hasAllCertificates = false;
+
+                foreach (CaCertificateId id in ids)
+                {
+                    if (id == CaCertificateId.All)
+                    {
+                        hasAllCertificates = true;
+
+                        break;
+                    }
+                }
+
+                if (hasAllCertificates)
+                {
+                    entries = new CertStoreEntry[_certificates.Count];
+
+                    int i = 0;
+
+                    foreach (CertStoreEntry entry in _certificates.Values)
+                    {
+                        entries[i++] = entry;
+                    }
+
+                    return true;
+                }
+                else
+                {
+                    entries = new CertStoreEntry[ids.Length];
+
+                    for (int i = 0; i < ids.Length; i++)
+                    {
+                        if (!_certificates.TryGetValue(ids[i], out CertStoreEntry entry))
+                        {
+                            return false;
+                        }
+
+                        entries[i] = entry;
+                    }
+
+                    return true;
+                }
+            }
+        }
+    }
+}

Ryujinx.HLE/HOS/Services/Ssl/ISslService.cs

@@ -1,6 +1,11 @@
 using Ryujinx.Common.Logging;
+using Ryujinx.HLE.Exceptions;
 using Ryujinx.HLE.HOS.Services.Ssl.SslService;
 using Ryujinx.HLE.HOS.Services.Ssl.Types;
+using Ryujinx.Memory;
+using System;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
 
 namespace Ryujinx.HLE.HOS.Services.Ssl
 {
@@ -18,13 +23,85 @@ namespace Ryujinx.HLE.HOS.Services.Ssl
             SslVersion sslVersion     = (SslVersion)context.RequestData.ReadUInt32();
             ulong      pidPlaceholder = context.RequestData.ReadUInt64();
 
-            MakeObject(context, new ISslContext(context));
+            MakeObject(context, new ISslContext(context.Request.HandleDesc.PId, sslVersion));
 
             Logger.Stub?.PrintStub(LogClass.ServiceSsl, new { sslVersion });
 
             return ResultCode.Success;
         }
 
+        private uint ComputeCertificateBufferSizeRequired(ReadOnlySpan<BuiltInCertificateManager.CertStoreEntry> entries)
+        {
+            uint totalSize = 0;
+
+            for (int i = 0; i < entries.Length; i++)
+            {
+                totalSize += (uint)Unsafe.SizeOf<BuiltInCertificateInfo>();
+                totalSize += (uint)entries[i].Data.Length;
+            }
+
+            return totalSize;
+        }
+
+        [CommandHipc(2)]
+        // GetCertificates(buffer<CaCertificateId, 5> ids) -> (u32 certificates_count, buffer<bytes, 6> certificates)
+        public ResultCode GetCertificates(ServiceCtx context)
+        {
+            ReadOnlySpan<CaCertificateId> ids = MemoryMarshal.Cast<byte, CaCertificateId>(context.Memory.GetSpan(context.Request.SendBuff[0].Position, (int)context.Request.SendBuff[0].Size));
+
+            if (!BuiltInCertificateManager.Instance.TryGetCertificates(ids, out BuiltInCertificateManager.CertStoreEntry[] entries))
+            {
+                throw new InvalidOperationException();
+            }
+
+            if (ComputeCertificateBufferSizeRequired(entries) > context.Request.ReceiveBuff[0].Size)
+            {
+                return ResultCode.InvalidCertBufSize;
+            }
+
+            using (WritableRegion region = context.Memory.GetWritableRegion(context.Request.ReceiveBuff[0].Position, (int)context.Request.ReceiveBuff[0].Size))
+            {
+                Span<byte> rawData = region.Memory.Span;
+                Span<BuiltInCertificateInfo> infos = MemoryMarshal.Cast<byte, BuiltInCertificateInfo>(rawData)[..entries.Length];
+                Span<byte> certificatesData = rawData[(Unsafe.SizeOf<BuiltInCertificateInfo>() * entries.Length)..];
+
+                for (int i = 0; i < infos.Length; i++)
+                {
+                    entries[i].Data.CopyTo(certificatesData);
+
+                    infos[i] = new BuiltInCertificateInfo
+                    {
+                        Id = entries[i].Id,
+                        Status = entries[i].Status,
+                        CertificateDataSize = (ulong)entries[i].Data.Length,
+                        CertificateDataOffset = (ulong)(rawData.Length - certificatesData.Length)
+                    };
+
+                    certificatesData = certificatesData[entries[i].Data.Length..];
+                }
+            }
+
+            context.ResponseData.Write(entries.Length);
+
+            return ResultCode.Success;
+        }
+
+        [CommandHipc(3)]
+        // GetCertificateBufSize(buffer<CaCertificateId, 5> ids) -> u32 buffer_size;
+        public ResultCode GetCertificateBufSize(ServiceCtx context)
+        {
+            ReadOnlySpan<CaCertificateId> ids = MemoryMarshal.Cast<byte, CaCertificateId>(context.Memory.GetSpan(context.Request.SendBuff[0].Position, (int)context.Request.SendBuff[0].Size));
+
+            if (!BuiltInCertificateManager.Instance.TryGetCertificates(ids, out BuiltInCertificateManager.CertStoreEntry[] entries))
+            {
+                throw new InvalidOperationException();
+            }
+
+            context.ResponseData.Write(ComputeCertificateBufferSizeRequired(entries));
+
+            return ResultCode.Success;
+        }
+
         [CommandHipc(5)]
         // SetInterfaceVersion(u32)
         public ResultCode SetInterfaceVersion(ServiceCtx context)

Ryujinx.HLE/HOS/Services/Ssl/ResultCode.cs

@@ -0,0 +1,20 @@
+namespace Ryujinx.HLE.HOS.Services.Ssl
+{
+    public enum ResultCode
+    {
+        OsModuleId     = 123,
+        ErrorCodeShift = 9,
+
+        Success            = 0,
+        NoSocket           = (103 << ErrorCodeShift) | OsModuleId,
+        InvalidSocket      = (106 << ErrorCodeShift) | OsModuleId,
+        InvalidCertBufSize = (112 << ErrorCodeShift) | OsModuleId,
+        InvalidOption      = (126 << ErrorCodeShift) | OsModuleId,
+        CertBufferTooSmall = (202 << ErrorCodeShift) | OsModuleId,
+        AlreadyInUse       = (203 << ErrorCodeShift) | OsModuleId,
+        WouldBlock         = (204 << ErrorCodeShift) | OsModuleId,
+        Timeout            = (205 << ErrorCodeShift) | OsModuleId,
+        ConnectionReset    = (209 << ErrorCodeShift) | OsModuleId,
+        ConnectionAbort    = (210 << ErrorCodeShift) | OsModuleId
+    }
+}

Ryujinx.HLE/HOS/Services/Ssl/SslService/ISslConnection.cs

@@ -1,41 +1,101 @@
 using Ryujinx.Common.Logging;
+using Ryujinx.HLE.Exceptions;
+using Ryujinx.HLE.HOS.Services.Sockets.Bsd;
 using Ryujinx.HLE.HOS.Services.Ssl.Types;
+using Ryujinx.Memory;
+using System;
 using System.Text;
 
 namespace Ryujinx.HLE.HOS.Services.Ssl.SslService
 {
-    class ISslConnection : IpcService
+    class ISslConnection : IpcService, IDisposable
     {
-        public ISslConnection() { }
+        private bool _doNotClockSocket;
+        private bool _getServerCertChain;
+        private bool _skipDefaultVerify;
+        private bool _enableAlpn;
+
+        private SslVersion _sslVersion;
+        private IoMode _ioMode;
+        private VerifyOption _verifyOption;
+        private SessionCacheMode _sessionCacheMode;
+        private string _hostName;
+
+        private ISslConnectionBase _connection;
+        private BsdContext _bsdContext;
+        private readonly long _processId;
+
+        private byte[] _nextAplnProto;
+
+        public ISslConnection(long processId, SslVersion sslVersion)
+        {
+            _processId = processId;
+            _sslVersion = sslVersion;
+            _ioMode = IoMode.Blocking;
+            _sessionCacheMode = SessionCacheMode.None;
+            _verifyOption = VerifyOption.PeerCa | VerifyOption.HostName;
+        }
 
         [CommandHipc(0)]
         // SetSocketDescriptor(u32) -> u32
         public ResultCode SetSocketDescriptor(ServiceCtx context)
         {
-            uint socketFd          = context.RequestData.ReadUInt32();
-            uint duplicateSocketFd = 0;
+            if (_connection != null)
+            {
+                return ResultCode.AlreadyInUse;
+            }
+
+            _bsdContext = BsdContext.GetContext(_processId);
+
+            if (_bsdContext == null)
+            {
+                return ResultCode.InvalidSocket;
+            }
+
+            int inputFd = context.RequestData.ReadInt32();
 
-            context.ResponseData.Write(duplicateSocketFd);
+            int internalFd = _bsdContext.DuplicateFileDescriptor(inputFd);
 
-            Logger.Stub?.PrintStub(LogClass.ServiceSsl, new { socketFd });
+            if (internalFd == -1)
+            {
+                return ResultCode.InvalidSocket;
+            }
+
+            InitializeConnection(internalFd);
+
+            int outputFd = inputFd;
+
+            if (_doNotClockSocket)
+            {
+                outputFd = -1;
+            }
+
+            context.ResponseData.Write(outputFd);
 
             return ResultCode.Success;
         }
 
+        private void InitializeConnection(int socketFd)
+        {
+            ISocket bsdSocket = _bsdContext.RetrieveSocket(socketFd);
+
+            _connection = new SslManagedSocketConnection(_bsdContext, _sslVersion, socketFd, bsdSocket);
+        }
+
         [CommandHipc(1)]
         // SetHostName(buffer<bytes, 5>)
         public ResultCode SetHostName(ServiceCtx context)
         {
             ulong hostNameDataPosition = context.Request.SendBuff[0].Position;
-            ulong hostNameDataSize     = context.Request.SendBuff[0].Size;
+            ulong hostNameDataSize = context.Request.SendBuff[0].Size;
 
             byte[] hostNameData = new byte[hostNameDataSize];
 
             context.Memory.Read(hostNameDataPosition, hostNameData);
 
-            string hostName = Encoding.ASCII.GetString(hostNameData).Trim('\0');
+            _hostName = Encoding.ASCII.GetString(hostNameData).Trim('\0');
 
-            Logger.Stub?.PrintStub(LogClass.ServiceSsl, new { hostName });
+            Logger.Info?.Print(LogClass.ServiceSsl, _hostName);
 
             return ResultCode.Success;
         }
@@ -44,9 +104,9 @@ namespace Ryujinx.HLE.HOS.Services.Ssl.SslService
         // SetVerifyOption(nn::ssl::sf::VerifyOption)
         public ResultCode SetVerifyOption(ServiceCtx context)
         {
-            VerifyOption verifyOption = (VerifyOption)context.RequestData.ReadUInt32();
+            _verifyOption = (VerifyOption)context.RequestData.ReadUInt32();
 
-            Logger.Stub?.PrintStub(LogClass.ServiceSsl, new { verifyOption });
+            Logger.Stub?.PrintStub(LogClass.ServiceSsl, new { _verifyOption });
 
             return ResultCode.Success;
         }
@@ -55,9 +115,67 @@ namespace Ryujinx.HLE.HOS.Services.Ssl.SslService
         // SetIoMode(nn::ssl::sf::IoMode)
         public ResultCode SetIoMode(ServiceCtx context)
         {
-            IoMode ioMode = (IoMode)context.RequestData.ReadUInt32();
+            if (_connection == null)
+            {
+                return ResultCode.NoSocket;
+            }
+
+            _ioMode = (IoMode)context.RequestData.ReadUInt32();
+
+            _connection.Socket.Blocking = _ioMode == IoMode.Blocking;
+
+            Logger.Stub?.PrintStub(LogClass.ServiceSsl, new { _ioMode });
+
+            return ResultCode.Success;
+        }
+
+        [CommandHipc(4)]
+        // GetSocketDescriptor() -> u32
+        public ResultCode GetSocketDescriptor(ServiceCtx context)
+        {
+            context.ResponseData.Write(_connection.SocketFd);
+
+            return ResultCode.Success;
+        }
+
+        [CommandHipc(5)]
+        // GetHostName(buffer<bytes, 6>) -> u32
+        public ResultCode GetHostName(ServiceCtx context)
+        {
+            ulong hostNameDataPosition = context.Request.ReceiveBuff[0].Position;
+            ulong hostNameDataSize = context.Request.ReceiveBuff[0].Size;
+
+            byte[] hostNameData = new byte[hostNameDataSize];
 
-            Logger.Stub?.PrintStub(LogClass.ServiceSsl, new { ioMode });
+            Encoding.ASCII.GetBytes(_hostName, hostNameData);
+
+            context.Memory.Write(hostNameDataPosition, hostNameData);
+
+            context.ResponseData.Write((uint)_hostName.Length);
+
+            Logger.Info?.Print(LogClass.ServiceSsl, _hostName);
+
+            return ResultCode.Success;
+        }
+
+        [CommandHipc(6)]
+        // GetVerifyOption() -> nn::ssl::sf::VerifyOption
+        public ResultCode GetVerifyOption(ServiceCtx context)
+        {
+            context.ResponseData.Write((uint)_verifyOption);
+
+            Logger.Stub?.PrintStub(LogClass.ServiceSsl, new { _verifyOption });
+
+            return ResultCode.Success;
+        }
+
+        [CommandHipc(7)]
+        // GetIoMode() -> nn::ssl::sf::IoMode
+        public ResultCode GetIoMode(ServiceCtx context)
+        {
+            context.ResponseData.Write((uint)_ioMode);
+
+            Logger.Stub?.PrintStub(LogClass.ServiceSsl, new { _ioMode });
 
             return ResultCode.Success;
         }
@@ -66,32 +184,155 @@ namespace Ryujinx.HLE.HOS.Services.Ssl.SslService
         // DoHandshake()
         public ResultCode DoHandshake(ServiceCtx context)
         {
-            Logger.Stub?.PrintStub(LogClass.ServiceSsl);
+            if (_connection == null)
+            {
+                return ResultCode.NoSocket;
+            }
 
-            return ResultCode.Success;
+            return _connection.Handshake(_hostName);
+        }
+
+        [CommandHipc(9)]
+        // DoHandshakeGetServerCert() -> (u32, u32, buffer<bytes, 6>)
+        public ResultCode DoHandshakeGetServerCert(ServiceCtx context)
+        {
+            if (_connection == null)
+            {
+                return ResultCode.NoSocket;
+            }
+
+            ResultCode result = _connection.Handshake(_hostName);
+
+            if (result == ResultCode.Success)
+            {
+                if (_getServerCertChain)
+                {
+                    using (WritableRegion region = context.Memory.GetWritableRegion(context.Request.ReceiveBuff[0].Position, (int)context.Request.ReceiveBuff[0].Size))
+                    {
+                        result = _connection.GetServerCertificate(_hostName, region.Memory.Span, out uint bufferSize, out uint certificateCount);
+
+                        context.ResponseData.Write(bufferSize);
+                        context.ResponseData.Write(certificateCount);
+                    }
+                }
+                else
+                {
+                    context.ResponseData.Write(0);
+                    context.ResponseData.Write(0);
+                }
+            }
+
+            return result;
+        }
+
+        [CommandHipc(10)]
+        // Read() -> (u32, buffer<bytes, 6>)
+        public ResultCode Read(ServiceCtx context)
+        {
+            if (_connection == null)
+            {
+                return ResultCode.NoSocket;
+            }
+
+            ResultCode result;
+
+            using (WritableRegion region = context.Memory.GetWritableRegion(context.Request.ReceiveBuff[0].Position, (int)context.Request.ReceiveBuff[0].Size))
+            {
+                // TODO: Better error management.
+                result = _connection.Read(out int readCount, region.Memory);
+
+                if (result == ResultCode.Success)
+                {
+                    context.ResponseData.Write(readCount);
+                }
+            }
+
+            return result;
         }
 
         [CommandHipc(11)]
-        // Write(buffer<bytes, 5>) -> u32
+        // Write(buffer<bytes, 5>) -> s32
         public ResultCode Write(ServiceCtx context)
         {
-            ulong inputDataPosition = context.Request.SendBuff[0].Position;
-            ulong inputDataSize     = context.Request.SendBuff[0].Size;
+            if (_connection == null)
+            {
+                return ResultCode.NoSocket;
+            }
 
-            byte[] data = new byte[inputDataSize];
+            // We don't dispose as this isn't supposed to be modified
+            WritableRegion region = context.Memory.GetWritableRegion(context.Request.SendBuff[0].Position, (int)context.Request.SendBuff[0].Size);
 
-            context.Memory.Read(inputDataPosition, data);
+            // TODO: Better error management.
+            ResultCode result = _connection.Write(out int writtenCount, region.Memory);
 
-            // NOTE: Tell the guest everything is transferred.
-            uint transferredSize = (uint)inputDataSize;
+            if (result == ResultCode.Success)
+            {
+                context.ResponseData.Write(writtenCount);
+            }
 
-            context.ResponseData.Write(transferredSize);
+            return result;
+        }
+
+        [CommandHipc(12)]
+        // Pending() -> s32
+        public ResultCode Pending(ServiceCtx context)
+        {
+            if (_connection == null)
+            {
+                return ResultCode.NoSocket;
+            }
 
-            Logger.Stub?.PrintStub(LogClass.ServiceSsl);
+            context.ResponseData.Write(_connection.Pending());
 
             return ResultCode.Success;
         }
 
+        [CommandHipc(13)]
+        // Peek() -> (s32, buffer<bytes, 6>)
+        public ResultCode Peek(ServiceCtx context)
+        {
+            if (_connection == null)
+            {
+                return ResultCode.NoSocket;
+            }
+
+            ResultCode result;
+
+            using (WritableRegion region = context.Memory.GetWritableRegion(context.Request.ReceiveBuff[0].Position, (int)context.Request.ReceiveBuff[0].Size))
+            {
+                // TODO: Better error management.
+                result = _connection.Peek(out int peekCount, region.Memory);
+
+                if (result == ResultCode.Success)
+                {
+                    context.ResponseData.Write(peekCount);
+                }
+            }
+
+            return result;
+        }
+
+        [CommandHipc(14)]
+        // Poll(nn::ssl::sf::PollEvent poll_event, u32 timeout) -> nn::ssl::sf::PollEvent
+        public ResultCode Poll(ServiceCtx context)
+        {
+            throw new ServiceNotImplementedException(this, context);
+        }
+
+        [CommandHipc(15)]
+        // GetVerifyCertError()
+        public ResultCode GetVerifyCertError(ServiceCtx context)
+        {
+            throw new ServiceNotImplementedException(this, context);
+        }
+
+        [CommandHipc(16)]
+        // GetNeededServerCertBufferSize() -> u32
+        public ResultCode GetNeededServerCertBufferSize(ServiceCtx context)
+        {
+            throw new ServiceNotImplementedException(this, context);
+        }
+
         [CommandHipc(17)]
         // SetSessionCacheMode(nn::ssl::sf::SessionCacheMode)
         public ResultCode SetSessionCacheMode(ServiceCtx context)
@@ -100,19 +341,176 @@ namespace Ryujinx.HLE.HOS.Services.Ssl.SslService
 
             Logger.Stub?.PrintStub(LogClass.ServiceSsl, new { sessionCacheMode });
 
+            _sessionCacheMode = sessionCacheMode;
+
             return ResultCode.Success;
         }
 
+        [CommandHipc(18)]
+        // GetSessionCacheMode() -> nn::ssl::sf::SessionCacheMode
+        public ResultCode GetSessionCacheMode(ServiceCtx context)
+        {
+            throw new ServiceNotImplementedException(this, context);
+        }
+
+        [CommandHipc(19)]
+        // FlushSessionCache()
+        public ResultCode FlushSessionCache(ServiceCtx context)
+        {
+            throw new ServiceNotImplementedException(this, context);
+        }
+
+        [CommandHipc(20)]
+        // SetRenegotiationMode(nn::ssl::sf::RenegotiationMode)
+        public ResultCode SetRenegotiationMode(ServiceCtx context)
+        {
+            throw new ServiceNotImplementedException(this, context);
+        }
+
+        [CommandHipc(21)]
+        // GetRenegotiationMode() -> nn::ssl::sf::RenegotiationMode
+        public ResultCode GetRenegotiationMode(ServiceCtx context)
+        {
+            throw new ServiceNotImplementedException(this, context);
+        }
+
         [CommandHipc(22)]
-        // SetOption(b8, nn::ssl::sf::OptionType)
+        // SetOption(b8 value, nn::ssl::sf::OptionType option)
         public ResultCode SetOption(ServiceCtx context)
         {
-            bool       optionEnabled = context.RequestData.ReadBoolean();
-            OptionType optionType    = (OptionType)context.RequestData.ReadUInt32();
+            bool       value  = context.RequestData.ReadUInt32() != 0;
+            OptionType option = (OptionType)context.RequestData.ReadUInt32();
+
+            Logger.Stub?.PrintStub(LogClass.ServiceSsl, new { option, value });
+
+            return SetOption(option, value);
+        }
+
+        [CommandHipc(23)]
+        // GetOption(nn::ssl::sf::OptionType) -> b8
+        public ResultCode GetOption(ServiceCtx context)
+        {
+            OptionType option = (OptionType)context.RequestData.ReadUInt32();
+
+            Logger.Stub?.PrintStub(LogClass.ServiceSsl, new { option });
+
+            ResultCode result = GetOption(option, out bool value);
+
+            if (result == ResultCode.Success)
+            {
+                context.ResponseData.Write(value);
+            }
+
+            return result;
+        }
+
+        [CommandHipc(24)]
+        // GetVerifyCertErrors() -> (u32, u32, buffer<bytes, 6>)
+        public ResultCode GetVerifyCertErrors(ServiceCtx context)
+        {
+            throw new ServiceNotImplementedException(this, context);
+        }
 
-            Logger.Stub?.PrintStub(LogClass.ServiceSsl, new { optionType, optionEnabled });
+        [CommandHipc(25)] // 4.0.0+
+        // GetCipherInfo(u32) -> buffer<bytes, 6>
+        public ResultCode GetCipherInfo(ServiceCtx context)
+        {
+            throw new ServiceNotImplementedException(this, context);
+        }
+
+        [CommandHipc(26)]
+        // SetNextAlpnProto(buffer<bytes, 5>) -> u32
+        public ResultCode SetNextAlpnProto(ServiceCtx context)
+        {
+            ulong inputDataPosition = context.Request.SendBuff[0].Position;
+            ulong inputDataSize = context.Request.SendBuff[0].Size;
+
+            _nextAplnProto = new byte[inputDataSize];
+
+            context.Memory.Read(inputDataPosition, _nextAplnProto);
+
+            Logger.Stub?.PrintStub(LogClass.ServiceSsl, new { inputDataSize });
+
+            return ResultCode.Success;
+        }
+
+        [CommandHipc(27)]
+        // GetNextAlpnProto(buffer<bytes, 6>) -> u32
+        public ResultCode GetNextAlpnProto(ServiceCtx context)
+        {
+            ulong outputDataPosition = context.Request.ReceiveBuff[0].Position;
+            ulong outputDataSize = context.Request.ReceiveBuff[0].Size;
+
+            context.Memory.Write(outputDataPosition, _nextAplnProto);
+
+            context.ResponseData.Write(_nextAplnProto.Length);
+
+            Logger.Stub?.PrintStub(LogClass.ServiceSsl, new { outputDataSize });
 
             return ResultCode.Success;
         }
+
+        private ResultCode SetOption(OptionType option, bool value)
+        {
+            switch (option)
+            {
+                case OptionType.DoNotCloseSocket:
+                    _doNotClockSocket = value;
+                    break;
+
+                case OptionType.GetServerCertChain:
+                    _getServerCertChain = value;
+                    break;
+
+                case OptionType.SkipDefaultVerify:
+                    _skipDefaultVerify = value;
+                    break;
+
+                case OptionType.EnableAlpn:
+                    _enableAlpn = value;
+                    break;
+
+                default:
+                    Logger.Warning?.Print(LogClass.ServiceSsl, $"Unsupported option {option}");
+                    return ResultCode.InvalidOption;
+            }
+
+            return ResultCode.Success;
+        }
+
+        private ResultCode GetOption(OptionType option, out bool value)
+        {
+            switch (option)
+            {
+                case OptionType.DoNotCloseSocket:
+                    value = _doNotClockSocket;
+                    break;
+
+                case OptionType.GetServerCertChain:
+                    value = _getServerCertChain;
+                    break;
+
+                case OptionType.SkipDefaultVerify:
+                    value = _skipDefaultVerify;
+                    break;
+
+                case OptionType.EnableAlpn:
+                    value = _enableAlpn;
+                    break;
+
+                default:
+                    Logger.Warning?.Print(LogClass.ServiceSsl, $"Unsupported option {option}");
+
+                    value = false;
+                    return ResultCode.InvalidOption;
+            }
+
+            return ResultCode.Success;
+        }
+
+        public void Dispose()
+        {
+            _connection?.Dispose();
+        }
     }
 }

Ryujinx.HLE/HOS/Services/Ssl/SslService/ISslConnectionBase.cs

@@ -0,0 +1,25 @@
+using Ryujinx.HLE.HOS.Services.Sockets.Bsd;
+using System;
+using System.Net.Sockets;
+
+namespace Ryujinx.HLE.HOS.Services.Ssl.SslService
+{
+    interface ISslConnectionBase: IDisposable
+    {
+        int SocketFd { get; }
+
+        ISocket Socket { get; }
+
+        ResultCode Handshake(string hostName);
+
+        ResultCode GetServerCertificate(string hostname, Span<byte> certificates, out uint storageSize, out uint certificateCount);
+
+        ResultCode Write(out int writtenCount, ReadOnlyMemory<byte> buffer);
+
+        ResultCode Read(out int readCount, Memory<byte> buffer);
+
+        ResultCode Peek(out int peekCount, Memory<byte> buffer);
+
+        int Pending();
+    }
+}

Ryujinx.HLE/HOS/Services/Ssl/SslService/ISslContext.cs

@@ -1,4 +1,5 @@
 using Ryujinx.Common.Logging;
+using Ryujinx.HLE.HOS.Services.Sockets.Bsd;
 using Ryujinx.HLE.HOS.Services.Ssl.Types;
 using System.Text;
 
@@ -8,16 +9,22 @@ namespace Ryujinx.HLE.HOS.Services.Ssl.SslService
     {
         private uint _connectionCount;
 
+        private readonly long _processId;
+        private readonly SslVersion _sslVersion;
         private ulong _serverCertificateId;
         private ulong _clientCertificateId;
 
-        public ISslContext(ServiceCtx context) { }
+        public ISslContext(long processId, SslVersion sslVersion)
+        {
+            _processId = processId;
+            _sslVersion = sslVersion;
+        }
 
         [CommandHipc(2)]
         // CreateConnection() -> object<nn::ssl::sf::ISslConnection>
         public ResultCode CreateConnection(ServiceCtx context)
         {
-            MakeObject(context, new ISslConnection());
+            MakeObject(context, new ISslConnection(_processId, _sslVersion));
 
             _connectionCount++;
 

Ryujinx.HLE/HOS/Services/Ssl/SslService/SslManagedSocketConnection.cs

@@ -0,0 +1,247 @@
+using Ryujinx.HLE.HOS.Services.Sockets.Bsd;
+using Ryujinx.HLE.HOS.Services.Ssl.Types;
+using System;
+using System.IO;
+using System.Net.Security;
+using System.Net.Sockets;
+using System.Security.Authentication;
+
+namespace Ryujinx.HLE.HOS.Services.Ssl.SslService
+{
+    class SslManagedSocketConnection : ISslConnectionBase
+    {
+        public int SocketFd { get; }
+
+        public ISocket Socket { get; }
+
+        private BsdContext _bsdContext;
+        private SslVersion _sslVersion;
+        private SslStream _stream;
+        private bool _isBlockingSocket;
+        private int _previousReadTimeout;
+
+        public SslManagedSocketConnection(BsdContext bsdContext, SslVersion sslVersion, int socketFd, ISocket socket)
+        {
+            _bsdContext = bsdContext;
+            _sslVersion = sslVersion;
+
+            SocketFd = socketFd;
+            Socket = socket;
+        }
+
+        private void StartSslOperation()
+        {
+            // Save blocking state
+            _isBlockingSocket = Socket.Blocking;
+
+            // Force blocking for SslStream
+            Socket.Blocking = true;
+        }
+
+        private void EndSslOperation()
+        {
+            // Restore blocking state
+            Socket.Blocking = _isBlockingSocket;
+        }
+
+        private void StartSslReadOperation()
+        {
+            StartSslOperation();
+
+            if (!_isBlockingSocket)
+            {
+                _previousReadTimeout = _stream.ReadTimeout;
+
+                _stream.ReadTimeout = 1;
+            }
+        }
+
+        private void EndSslReadOperation()
+        {
+            if (!_isBlockingSocket)
+            {
+                _stream.ReadTimeout = _previousReadTimeout;
+            }
+
+            EndSslOperation();
+        }
+
+        private static SslProtocols TranslateSslVersion(SslVersion version)
+        {
+            switch (version & SslVersion.VersionMask)
+            {
+                case SslVersion.Auto:
+                    return SslProtocols.Tls | SslProtocols.Tls11 | SslProtocols.Tls12 | SslProtocols.Tls13;
+                case SslVersion.TlsV10:
+                    return SslProtocols.Tls;
+                case SslVersion.TlsV11:
+                    return SslProtocols.Tls11;
+                case SslVersion.TlsV12:
+                    return SslProtocols.Tls12;
+                case SslVersion.TlsV13:
+                    return SslProtocols.Tls13;
+                default:
+                    throw new NotImplementedException(version.ToString());
+            }
+        }
+
+        public ResultCode Handshake(string hostName)
+        {
+            StartSslOperation();
+            _stream = new SslStream(new NetworkStream(((ManagedSocket)Socket).Socket, false), false, null, null);
+            _stream.AuthenticateAsClient(hostName, null, TranslateSslVersion(_sslVersion), false);
+            EndSslOperation();
+
+            return ResultCode.Success;
+        }
+
+        public ResultCode Peek(out int peekCount, Memory<byte> buffer)
+        {
+            // NOTE: We cannot support that on .NET SSL API.
+            // As Nintendo's curl implementation detail check if a connection is alive via Peek, we just return that it would block to let it know that it's alive.
+            peekCount = -1;
+
+            return ResultCode.WouldBlock;
+        }
+
+        public int Pending()
+        {
+            // Unsupported
+            return 0;
+        }
+
+        private static bool TryTranslateWinSockError(bool isBlocking, WsaError error, out ResultCode resultCode)
+        {
+            switch (error)
+            {
+                case WsaError.WSAETIMEDOUT:
+                    resultCode = isBlocking ? ResultCode.Timeout : ResultCode.WouldBlock;
+                    return true;
+                case WsaError.WSAECONNABORTED:
+                    resultCode = ResultCode.ConnectionAbort;
+                    return true;
+                case WsaError.WSAECONNRESET:
+                    resultCode = ResultCode.ConnectionReset;
+                    return true;
+                default:
+                    resultCode = ResultCode.Success;
+                    return false;
+            }
+        }
+
+        public ResultCode Read(out int readCount, Memory<byte> buffer)
+        {
+            if (!Socket.Poll(0, SelectMode.SelectRead))
+            {
+                readCount = -1;
+
+                return ResultCode.WouldBlock;
+            }
+
+            StartSslReadOperation();
+
+            try
+            {
+                readCount = _stream.Read(buffer.Span);
+            }
+            catch (IOException exception)
+            {
+                readCount = -1;
+
+                if (exception.InnerException is SocketException socketException)
+                {
+                    WsaError socketErrorCode = (WsaError)socketException.SocketErrorCode;
+
+                    if (TryTranslateWinSockError(_isBlockingSocket, socketErrorCode, out ResultCode result))
+                    {
+                        return result;
+                    }
+                    else
+                    {
+                        throw socketException;
+                    }
+                }
+                else
+                {
+                    throw exception;
+                }
+            }
+            finally
+            {
+                EndSslReadOperation();
+            }
+
+            return ResultCode.Success;
+        }
+
+        public ResultCode Write(out int writtenCount, ReadOnlyMemory<byte> buffer)
+        {
+            if (!Socket.Poll(0, SelectMode.SelectWrite))
+            {
+                writtenCount = 0;
+
+                return ResultCode.WouldBlock;
+            }
+
+            StartSslOperation();
+
+            try
+            {
+                _stream.Write(buffer.Span);
+            }
+            catch (IOException exception)
+            {
+                writtenCount = -1;
+
+                if (exception.InnerException is SocketException socketException)
+                {
+                    WsaError socketErrorCode = (WsaError)socketException.SocketErrorCode;
+
+                    if (TryTranslateWinSockError(_isBlockingSocket, socketErrorCode, out ResultCode result))
+                    {
+                        return result;
+                    }
+                    else
+                    {
+                        throw socketException;
+                    }
+                }
+                else
+                {
+                    throw exception;
+                }
+            }
+            finally
+            {
+                EndSslOperation();
+            }
+
+            // .NET API doesn't provide the size written, assume all written.
+            writtenCount = buffer.Length;
+
+            return ResultCode.Success;
+        }
+
+        public ResultCode GetServerCertificate(string hostname, Span<byte> certificates, out uint storageSize, out uint certificateCount)
+        {
+            byte[] rawCertData = _stream.RemoteCertificate.GetRawCertData();
+
+            storageSize = (uint)rawCertData.Length;
+            certificateCount = 1;
+
+            if (rawCertData.Length > certificates.Length)
+            {
+                return ResultCode.CertBufferTooSmall;
+            }
+
+            rawCertData.CopyTo(certificates);
+
+            return ResultCode.Success;
+        }
+
+        public void Dispose()
+        {
+            _bsdContext.CloseFileDescriptor(SocketFd);
+        }
+    }
+}

Ryujinx.HLE/HOS/Services/Ssl/Types/BuiltInCertificateInfo.cs

@@ -0,0 +1,10 @@
+namespace Ryujinx.HLE.HOS.Services.Ssl.Types
+{
+    struct BuiltInCertificateInfo
+    {
+        public CaCertificateId Id;
+        public TrustedCertStatus Status;
+        public ulong CertificateDataSize;
+        public ulong CertificateDataOffset;
+    }
+}

Ryujinx.HLE/HOS/Services/Ssl/Types/CaCertificateId.cs

@@ -0,0 +1,68 @@
+namespace Ryujinx.HLE.HOS.Services.Ssl.Types
+{
+    enum CaCertificateId : uint
+    {
+        // Nintendo CAs
+        NintendoCAG3 = 1,
+        NintendoClass2CAG3,
+
+        // External CAs
+        AmazonRootCA1 = 1000,
+        StarfieldServicesRootCertificateAuthorityG2,
+        AddTrustExternalCARoot,
+        COMODOCertificationAuthority,
+        UTNDATACorpSGC,
+        UTNUSERFirstHardware,
+        BaltimoreCyberTrustRoot,
+        CybertrustGlobalRoot,
+        VerizonGlobalRootCA,
+        DigiCertAssuredIDRootCA,
+        DigiCertAssuredIDRootG2,
+        DigiCertGlobalRootCA,
+        DigiCertGlobalRootG2,
+        DigiCertHighAssuranceEVRootCA,
+        EntrustnetCertificationAuthority2048,
+        EntrustRootCertificationAuthority,
+        EntrustRootCertificationAuthorityG2,
+        GeoTrustGlobalCA2,
+        GeoTrustGlobalCA,
+        GeoTrustPrimaryCertificationAuthorityG3,
+        GeoTrustPrimaryCertificationAuthority,
+        GlobalSignRootCA,
+        GlobalSignRootCAR2,
+        GlobalSignRootCAR3,
+        GoDaddyClass2CertificationAuthority,
+        GoDaddyRootCertificateAuthorityG2,
+        StarfieldClass2CertificationAuthority,
+        StarfieldRootCertificateAuthorityG2,
+        ThawtePrimaryRootCAG3,
+        ThawtePrimaryRootCA,
+        VeriSignClass3PublicPrimaryCertificationAuthorityG3,
+        VeriSignClass3PublicPrimaryCertificationAuthorityG5,
+        VeriSignUniversalRootCertificationAuthority,
+        DSTRootCAX3,
+        USERTrustRSACertificationAuthority,
+        ISRGRootX10,
+        USERTrustECCCertificationAuthority,
+        COMODORSACertificationAuthority,
+        COMODOECCCertificationAuthority,
+        AmazonRootCA2,
+        AmazonRootCA3,
+        AmazonRootCA4,
+        DigiCertAssuredIDRootG3,
+        DigiCertGlobalRootG3,
+        DigiCertTrustedRootG4,
+        EntrustRootCertificationAuthorityEC1,
+        EntrustRootCertificationAuthorityG4,
+        GlobalSignECCRootCAR4,
+        GlobalSignECCRootCAR5,
+        GlobalSignECCRootCAR6,
+        GTSRootR1,
+        GTSRootR2,
+        GTSRootR3,
+        GTSRootR4,
+        SecurityCommunicationRootCA,
+
+        All = uint.MaxValue
+    }
+}

Ryujinx.HLE/HOS/Services/Ssl/Types/SslVersion.cs

@@ -10,6 +10,7 @@ namespace Ryujinx.HLE.HOS.Services.Ssl.Types
         TlsV11 = 1 << 4,
         TlsV12 = 1 << 5,
         TlsV13 = 1 << 6, // 11.0.0+
-        Auto2  = 1 << 24 // 11.0.0+
+
+        VersionMask = 0xFFFFFF
     }
 }

Ryujinx.HLE/HOS/Services/Ssl/Types/TrustedCertStatus.cs

@@ -0,0 +1,12 @@
+namespace Ryujinx.HLE.HOS.Services.Ssl.Types
+{
+    enum TrustedCertStatus : uint
+    {
+        Removed,
+        EnabledTrusted,
+        EnabledNotTrusted,
+        Revoked,
+
+        Invalid = uint.MaxValue
+    }
+}