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/*
 *----------------------------------------------------------------------
 * Copyright (C) 1997-2000 Matt Newman <[email protected]>
 *
 * TLS (aka SSL) Channel - can be layered on any bi-directional
 * Tcl_Channel (Note: Requires Trf Core Patch)
 *	Macro and structure definitions
 *
 * This was built from scratch based upon observation of OpenSSL 0.9.2B
 *
 * Addition credit is due for Andreas Kupries ([email protected]), for
 * providing the Tcl_ReplaceChannel mechanism and working closely with me
 * to enhance it to support full fileevent semantics.
 *
 * Also work done by the follow people provided the impetus to do this "right":-
 *	tclSSL (Colin McCormack, Shared Technology)
 *	SSLtcl (Peter Antman)
 *
 *----------------------------------------------------------------------
 */
#ifndef _TLSINT_H
#define _TLSINT_H

/* Platform unique definitions */
#ifdef _WIN32
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <wincrypt.h> /* OpenSSL needs this on Windows */
#endif

#include "tls.h"
#include <errno.h>
#include <string.h>
#include <stdint.h>
#include <openssl/ssl.h>
#include <openssl/err.h>
#include <openssl/rand.h>
#include <openssl/opensslv.h>

/* Windows needs to know which symbols to export. */
#ifdef _WIN32
#define WIN32_LEAN_AND_MEAN
#ifdef BUILD_tls
#undef TCL_STORAGE_CLASS
#define TCL_STORAGE_CLASS DLLEXPORT
#include <windows.h>
#include <wincrypt.h> /* OpenSSL needs this on Windows */
#endif
#endif /* BUILD_udp */

/* Handle TCL 8.6 CONST changes */
#ifndef CONST86
#   if TCL_MAJOR_VERSION > 8
#	define CONST86 const
#   else
#	define CONST86
#   endif
#endif

/*
 * Backwards compatibility for size type change
 */
#if TCL_MAJOR_VERSION < 9 && TCL_MINOR_VERSION < 7
    #include <limits.h>
    #define TCL_SIZE_MAX INT_MAX

    #ifndef Tcl_Size
        typedef int Tcl_Size;
    #endif

    #define TCL_SIZE_MODIFIER ""
    #define Tcl_GetSizeIntFromObj Tcl_GetIntFromObj
    #define Tcl_NewSizeIntObj     Tcl_NewIntObj
    #define Tcl_NewSizeIntFromObj Tcl_NewWideIntObj
#endif

#include <openssl/ssl.h>
#include <openssl/err.h>
#include <openssl/rand.h>
#include <openssl/opensslv.h>

/* Define missing POSIX error codes */
#ifndef ECONNABORTED
#define ECONNABORTED	130	/* Software caused connection abort */
#endif
#ifndef ECONNRESET
#define ECONNRESET	131	/* Connection reset by peer */
#endif

/* Debug and error macros */
#ifdef TCLEXT_TCLTLS_DEBUG
#include <ctype.h>
#define dprintf(...) { \
	char dprintfBuffer[8192], *dprintfBuffer_p; \
	dprintfBuffer_p = &dprintfBuffer[0]; \
	dprintfBuffer_p += sprintf(dprintfBuffer_p, "%s:%i:%s():", __FILE__, __LINE__, __func__); \
	dprintfBuffer_p += sprintf(dprintfBuffer_p, __VA_ARGS__); \
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	SSL_CTX *ctx;		/* SSL Context */
	BIO *bio;		/* Struct for SSL processing */
	BIO *p_bio;		/* Parent BIO (that is layered on Tcl_Channel) */

	unsigned char *protos;	/* List of supported protocols in protocol format */
	unsigned int protos_len; /* Length of protos */

	char *err;
	const char *err;
} State;

#ifdef USE_TCL_STUBS
#ifndef Tcl_StackChannel
#error "Unable to compile on this version of Tcl"
#endif /* Tcl_GetStackedChannel */
#endif /* USE_TCL_STUBS */
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 * Forward declarations
 */
const Tcl_ChannelType *Tls_ChannelType(void);
Tcl_Channel     Tls_GetParent(State *statePtr, int maskFlags);

Tcl_Obj         *Tls_NewX509Obj(Tcl_Interp *interp, X509 *cert);
Tcl_Obj		*Tls_NewCAObj(Tcl_Interp *interp, const SSL *ssl, int peer);
void            Tls_Error(State *statePtr, char *msg);
void            Tls_Error(State *statePtr, const char *msg);
void            Tls_Free(tls_free_type *blockPtr);
void            Tls_Clean(State *statePtr);
int             Tls_WaitForConnect(State *statePtr, int *errorCodePtr, int handshakeFailureIsPermanent);

BIO             *BIO_new_tcl(State* statePtr, int flags);

#define PTR2INT(x) ((int) ((intptr_t) (x)))

#endif /* _TLSINT_H */
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