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Merge pull request #7692 from gasbytes/sni-csharp-wrapper-patch

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Sni csharp wrapper patch
This commit is contained in:
JacobBarthelmeh
2024-07-02 16:49:31 -06:00
committed by GitHub
parent 32066373c2 91cad98d67
commit 5aca239714
2 changed files with 77 additions and 0 deletions
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50
wrapper/CSharp/wolfSSL-TLS-Server/wolfSSL-TLS-Server.cs
View File

@ -155,6 +155,7 @@ public class wolfSSL_TLS_CSHarp
Console.WriteLine("Started TCP and waiting for a connection");
fd = tcp.AcceptSocket();
ssl = wolfssl.new_ssl(ctx);
if (ssl == IntPtr.Zero)
{
@ -208,6 +209,16 @@ public class wolfSSL_TLS_CSHarp
return;
}
/* get and print sni used by the client */
if (haveSNI(args)) {
IntPtr data = IntPtr.Zero;
ushort size = wolfssl.SNI_GetRequest(ssl, 0, ref data);
string dataStr = Marshal.PtrToStringAnsi(data);
Console.WriteLine("(SNI_GetRequest) Size of SNI used by client: " + size);
Console.WriteLine("(SNI_GetRequest) SNI used by client: " + dataStr);
}
/* print out results of TLS/SSL accept */
Console.WriteLine("SSL version is " + wolfssl.get_version(ssl));
Console.WriteLine("SSL cipher suite is " + wolfssl.get_current_cipher(ssl));
@ -222,6 +233,45 @@ public class wolfSSL_TLS_CSHarp
}
Console.WriteLine(buff);
/* get and print sni from a sample buffer, can be used by using the raw client hello */
if (haveSNI(args)) {
IntPtr result = Marshal.AllocHGlobal(32);
IntPtr inOutSz = Marshal.AllocHGlobal(sizeof(int));
Marshal.WriteInt32(inOutSz, 32);
byte []buffer = { /* from TextMate website client hello example */
0x16, 0x03, 0x01, 0x00, 0xc6, 0x01, 0x00, 0x00, 0xc2, 0x03, 0x03, 0x52,
0x8b, 0x7b, 0xca, 0x69, 0xec, 0x97, 0xd5, 0x08, 0x03, 0x50, 0xfe, 0x3b,
0x99, 0xc3, 0x20, 0xce, 0xa5, 0xf6, 0x99, 0xa5, 0x71, 0xf9, 0x57, 0x7f,
0x04, 0x38, 0xf6, 0x11, 0x0b, 0xb8, 0xd3, 0x00, 0x00, 0x5e, 0x00, 0xff,
0xc0, 0x24, 0xc0, 0x23, 0xc0, 0x0a, 0xc0, 0x09, 0xc0, 0x07, 0xc0, 0x08,
0xc0, 0x28, 0xc0, 0x27, 0xc0, 0x14, 0xc0, 0x13, 0xc0, 0x11, 0xc0, 0x12,
0xc0, 0x26, 0xc0, 0x25, 0xc0, 0x2a, 0xc0, 0x29, 0xc0, 0x05, 0xc0, 0x04,
0xc0, 0x02, 0xc0, 0x03, 0xc0, 0x0f, 0xc0, 0x0e, 0xc0, 0x0c, 0xc0, 0x0d,
0x00, 0x3d, 0x00, 0x3c, 0x00, 0x2f, 0x00, 0x05, 0x00, 0x04, 0x00, 0x35,
0x00, 0x0a, 0x00, 0x67, 0x00, 0x6b, 0x00, 0x33, 0x00, 0x39, 0x00, 0x16,
0x00, 0xaf, 0x00, 0xae, 0x00, 0x8d, 0x00, 0x8c, 0x00, 0x8a, 0x00, 0x8b,
0x00, 0xb1, 0x00, 0xb0, 0x00, 0x2c, 0x00, 0x3b, 0x01, 0x00, 0x00, 0x3b,
0x00, 0x00, 0x00, 0x15, 0x00, 0x13, 0x00, 0x00, 0x10, 0x61, 0x70, 0x69,
0x2e, 0x74, 0x65, 0x78, 0x74, 0x6d, 0x61, 0x74, 0x65, 0x2e, 0x6f, 0x72,
0x67, 0x00, 0x0a, 0x00, 0x08, 0x00, 0x06, 0x00, 0x17, 0x00, 0x18, 0x00,
0x19, 0x00, 0x0b, 0x00, 0x02, 0x01, 0x00, 0x00, 0x0d, 0x00, 0x0c, 0x00,
0x0a, 0x05, 0x01, 0x04, 0x01, 0x02, 0x01, 0x04, 0x03, 0x02, 0x03
};
int ret = wolfssl.SNI_GetFromBuffer(buffer, 1024, 0, result, inOutSz);
if (ret != wolfssl.SUCCESS) {
Console.WriteLine("Error on reading SNI from buffer, ret value = " + ret);
tcp.Stop();
clean(ssl, ctx);
return;
}
string resultStr = Marshal.PtrToStringAnsi(result);
Console.WriteLine("(SNI_GetFromBuffer) SNI used by client: " + resultStr);
}
if (wolfssl.write(ssl, reply, reply.Length) != reply.Length)
{
Console.WriteLine("Error in write");

27
wrapper/CSharp/wolfSSL_CSharp/wolfSSL.cs
View File

@ -330,6 +330,10 @@ namespace wolfSSL.CSharp {
private extern static int wolfSSL_CTX_UseSNI(IntPtr ctx, byte type, IntPtr data, ushort size);
[DllImport(wolfssl_dll, CallingConvention = CallingConvention.Cdecl)]
private extern static int wolfSSL_UseSNI(IntPtr ssl, byte type, IntPtr data, ushort size);
[DllImport(wolfssl_dll, CallingConvention = CallingConvention.Cdecl)]
private extern static ushort wolfSSL_SNI_GetRequest(IntPtr ssl, byte type, ref IntPtr data);
[DllImport(wolfssl_dll, CallingConvention = CallingConvention.Cdecl)]
private extern static int wolfSSL_SNI_GetFromBuffer(byte[] clientHello, uint helloSz, byte type, IntPtr sni, IntPtr inOutSz);
/********************************
* SSL Structure
@ -1200,6 +1204,29 @@ namespace wolfSSL.CSharp {
}
}
public static ushort SNI_GetRequest(IntPtr ssl, byte type, ref IntPtr data)
{
try {
GCHandle gch = GCHandle.FromIntPtr(ssl);
ssl_handle handles = (ssl_handle)gch.Target;
return wolfSSL_SNI_GetRequest(handles.get_ssl(), type, ref data);
} catch (Exception e) {
log(ERROR_LOG, "wolfssl sni get request error: " + e.ToString());
return ushort.MaxValue;
}
}
public static int SNI_GetFromBuffer(byte []clientHello, uint helloSz, byte type, IntPtr sni, IntPtr inOutSz)
{
try {
return wolfSSL_SNI_GetFromBuffer(clientHello, helloSz, type, sni, inOutSz);
} catch(Exception e) {
log(ERROR_LOG, "wolfssl sni get from buffer error: " + e.ToString());
return FAILURE;
}
}
/// <summary>
/// Set identity hint to use
/// </summary>