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/*
* Copyright (C) 1997-1999 Matt Newman <matt@novadigm.com>
* some modifications:
* Copyright (C) 2000 Ajuba Solutions
* Copyright (C) 2002 ActiveState Corporation
* Copyright (C) 2004 Starfish Systems
*
* $Header: /home/rkeene/tmp/cvs2fossil/../tcltls/tls/tls/tls.c,v 1.33 2012/07/09 23:28:02 andreas_kupries Exp $
*
* TLS (aka SSL) Channel - can be layered on any bi-directional
* Tcl_Channel (Note: Requires Trf Core Patch)
*
* This was built (almost) from scratch based upon observation of
* OpenSSL 0.9.2B
*
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/*
* Copyright (C) 1997-1999 Matt Newman <matt@novadigm.com>
* some modifications:
* Copyright (C) 2000 Ajuba Solutions
* Copyright (C) 2002 ActiveState Corporation
* Copyright (C) 2004 Starfish Systems
*
* $Header: /home/rkeene/tmp/cvs2fossil/../tcltls/tls/tls/tls.c,v 1.34 2014/04/16 18:33:03 andreas_kupries Exp $
*
* TLS (aka SSL) Channel - can be layered on any bi-directional
* Tcl_Channel (Note: Requires Trf Core Patch)
*
* This was built (almost) from scratch based upon observation of
* OpenSSL 0.9.2B
*
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Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
static int UnimportObjCmd _ANSI_ARGS_ ((ClientData clientData,
Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
static SSL_CTX *CTX_Init _ANSI_ARGS_((State *statePtr, int proto, char *key,
char *cert, char *CAdir, char *CAfile, char *ciphers));
#define TLS_PROTO_SSL2 0x01
#define TLS_PROTO_SSL3 0x02
#define TLS_PROTO_TLS1 0x04
#define ENABLED(flag, mask) (((flag) & (mask)) == (mask))
/*
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Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
static int UnimportObjCmd _ANSI_ARGS_ ((ClientData clientData,
Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
static SSL_CTX *CTX_Init _ANSI_ARGS_((State *statePtr, int proto, char *key,
char *cert, char *CAdir, char *CAfile, char *ciphers));
static int TlsLibInit _ANSI_ARGS_ (()) ;
#define TLS_PROTO_SSL2 0x01
#define TLS_PROTO_SSL3 0x02
#define TLS_PROTO_TLS1 0x04
#define ENABLED(flag, mask) (((flag) & (mask)) == (mask))
/*
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/*
* Threaded operation requires locking callbacks
* Based from /crypto/cryptlib.c of OpenSSL and NSOpenSSL.
*/
static Tcl_Mutex locks[CRYPTO_NUM_LOCKS];
static void CryptoThreadLockCallback (int mode, int n, const char *file, int line);
static unsigned long CryptoThreadIdCallback (void);
static void
CryptoThreadLockCallback(int mode, int n, const char *file, int line)
{
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/*
* Threaded operation requires locking callbacks
* Based from /crypto/cryptlib.c of OpenSSL and NSOpenSSL.
*/
static Tcl_Mutex locks[CRYPTO_NUM_LOCKS];
static Tcl_Mutex init_mx;
static int initialized;
static void CryptoThreadLockCallback (int mode, int n, const char *file, int line);
static unsigned long CryptoThreadIdCallback (void);
static void
CryptoThreadLockCallback(int mode, int n, const char *file, int line)
{
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*-------------------------------------------------------------------
*/
int
Tls_Init(Tcl_Interp *interp) /* Interpreter in which the package is
* to be made available. */
{
int major, minor, patchlevel, release, i;
char rnd_seed[16] = "GrzSlplKqUdnnzP!"; /* 16 bytes */
#if defined(OPENSSL_THREADS) && defined(TCL_THREADS)
size_t num_locks;
#endif
/*
* The original 8.2.0 stacked channel implementation (and the patch
* that preceded it) had problems with scalability and robustness.
* These were address in 8.3.2 / 8.4a2, so we now require that as a
* minimum for TLS 1.4+. We only support 8.2+ now (8.3.2+ preferred).
*/
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*-------------------------------------------------------------------
*/
int
Tls_Init(Tcl_Interp *interp) /* Interpreter in which the package is
* to be made available. */
{
int major, minor, patchlevel, release;
/*
* The original 8.2.0 stacked channel implementation (and the patch
* that preceded it) had problems with scalability and robustness.
* These were address in 8.3.2 / 8.4a2, so we now require that as a
* minimum for TLS 1.4+. We only support 8.2+ now (8.3.2+ preferred).
*/
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/* 8.3.2+ */
channelTypeVersion = TLS_CHANNEL_VERSION_2;
} else {
/* 8.2.0 - 8.3.1 */
channelTypeVersion = TLS_CHANNEL_VERSION_1;
}
if (CRYPTO_set_mem_functions((void *(*)(size_t))Tcl_Alloc,
(void *(*)(void *, size_t))Tcl_Realloc,
(void(*)(void *))Tcl_Free) == 0) {
/* Not using Tcl's mem functions ... not critical */
}
#if defined(OPENSSL_THREADS) && defined(TCL_THREADS)
/* should we consider allocating mutexes? */
num_locks = CRYPTO_num_locks();
if (num_locks > CRYPTO_NUM_LOCKS) {
Tcl_AppendResult(interp, "crypto num locks size error", NULL);
return TCL_ERROR;
}
CRYPTO_set_locking_callback(CryptoThreadLockCallback);
CRYPTO_set_id_callback(CryptoThreadIdCallback);
#endif
if (SSL_library_init() != 1) {
Tcl_AppendResult(interp, "could not initialize SSL library", NULL);
return TCL_ERROR;
}
SSL_load_error_strings();
ERR_load_crypto_strings();
/*
* Seed the random number generator in the SSL library,
* using the do/while construct because of the bug note in the
* OpenSSL FAQ at http://www.openssl.org/support/faq.html#USER1
*
* The crux of the problem is that Solaris 7 does not have a
* /dev/random or /dev/urandom device so it cannot gather enough
* entropy from the RAND_seed() when TLS initializes and refuses
* to go further. Earlier versions of OpenSSL carried on regardless.
*/
srand((unsigned int) time((time_t *) NULL));
do {
for (i = 0; i < 16; i++) {
rnd_seed[i] = 1 + (char) (255.0 * rand()/(RAND_MAX+1.0));
}
RAND_seed(rnd_seed, sizeof(rnd_seed));
} while (RAND_status() != 1);
Tcl_CreateObjCommand(interp, "tls::ciphers", CiphersObjCmd,
(ClientData) 0, (Tcl_CmdDeleteProc *) NULL);
Tcl_CreateObjCommand(interp, "tls::handshake", HandshakeObjCmd,
(ClientData) 0, (Tcl_CmdDeleteProc *) NULL);
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/* 8.3.2+ */
channelTypeVersion = TLS_CHANNEL_VERSION_2;
} else {
/* 8.2.0 - 8.3.1 */
channelTypeVersion = TLS_CHANNEL_VERSION_1;
}
if (TlsLibInit() != TCL_OK) {
Tcl_AppendResult(interp, "could not initialize SSL library", NULL);
return TCL_ERROR;
}
Tcl_CreateObjCommand(interp, "tls::ciphers", CiphersObjCmd,
(ClientData) 0, (Tcl_CmdDeleteProc *) NULL);
Tcl_CreateObjCommand(interp, "tls::handshake", HandshakeObjCmd,
(ClientData) 0, (Tcl_CmdDeleteProc *) NULL);
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*/
int
Tls_SafeInit (Tcl_Interp* interp)
{
return Tls_Init (interp);
}
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*/
int
Tls_SafeInit (Tcl_Interp* interp)
{
return Tls_Init (interp);
}
/*
*------------------------------------------------------*
*
* TlsLibInit --
*
* ------------------------------------------------*
* Initializes SSL library once per application
* ------------------------------------------------*
*
* Side effects:
* initilizes SSL library
*
* Result:
* none
*
*------------------------------------------------------*
*/
static int
TlsLibInit ()
{
int i;
char rnd_seed[16] = "GrzSlplKqUdnnzP!"; /* 16 bytes */
#if defined(OPENSSL_THREADS) && defined(TCL_THREADS)
size_t num_locks;
#endif
int status=TCL_OK;
if (!initialized) {
Tcl_MutexLock(&init_mx);
if (!initialized) {
initialized = 1;
if (CRYPTO_set_mem_functions((void *(*)(size_t))Tcl_Alloc,
(void *(*)(void *, size_t))Tcl_Realloc,
(void(*)(void *))Tcl_Free) == 0) {
/* Not using Tcl's mem functions ... not critical */
}
#if defined(OPENSSL_THREADS) && defined(TCL_THREADS)
/* should we consider allocating mutexes? */
num_locks = CRYPTO_num_locks();
if (num_locks > CRYPTO_NUM_LOCKS) {
status=TCL_ERROR;
goto done;
}
CRYPTO_set_locking_callback(CryptoThreadLockCallback);
CRYPTO_set_id_callback(CryptoThreadIdCallback);
#endif
if (SSL_library_init() != 1) {
status=TCL_ERROR;
goto done;
}
SSL_load_error_strings();
ERR_load_crypto_strings();
/*
* Seed the random number generator in the SSL library,
* using the do/while construct because of the bug note in the
* OpenSSL FAQ at http://www.openssl.org/support/faq.html#USER1
*
* The crux of the problem is that Solaris 7 does not have a
* /dev/random or /dev/urandom device so it cannot gather enough
* entropy from the RAND_seed() when TLS initializes and refuses
* to go further. Earlier versions of OpenSSL carried on regardless.
*/
srand((unsigned int) time((time_t *) NULL));
do {
for (i = 0; i < 16; i++) {
rnd_seed[i] = 1 + (char) (255.0 * rand()/(RAND_MAX+1.0));
}
RAND_seed(rnd_seed, sizeof(rnd_seed));
} while (RAND_status() != 1);
}
done:
Tcl_MutexUnlock(&init_mx);
}
return status;
}
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