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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 $
* $Header: /home/rkeene/tmp/cvs2fossil/../tcltls/tls/tls/tls.c,v 1.35 2014/12/08 19:09:06 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 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 TLS_PROTO_SSL2 0x01
#define TLS_PROTO_SSL3 0x02
#define TLS_PROTO_TLS1 0x04
#define TLS_PROTO_TLS1_1 0x08
#define TLS_PROTO_TLS1_2 0x10
#define ENABLED(flag, mask) (((flag) & (mask)) == (mask))
/*
* Static data structures
*/
#ifndef NO_DH
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CiphersObjCmd(clientData, interp, objc, objv)
ClientData clientData; /* Not used. */
Tcl_Interp *interp;
int objc;
Tcl_Obj *CONST objv[];
{
static CONST84 char *protocols[] = {
"ssl2", "ssl3", "tls1", NULL
"ssl2", "ssl3", "tls1", "tls1.1", "tls1.2", NULL
};
enum protocol {
TLS_SSL2, TLS_SSL3, TLS_TLS1, TLS_NONE
TLS_SSL2, TLS_SSL3, TLS_TLS1, TLS_TLS1_1, TLS_TLS1_2, TLS_NONE
};
Tcl_Obj *objPtr;
SSL_CTX *ctx = NULL;
SSL *ssl = NULL;
STACK_OF(SSL_CIPHER) *sk;
char *cp, buf[BUFSIZ];
int index, verbose = 0;
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case TLS_TLS1:
#if defined(NO_TLS1)
Tcl_AppendResult(interp, "protocol not supported", NULL);
return TCL_ERROR;
#else
ctx = SSL_CTX_new(TLSv1_method()); break;
#endif
case TLS_TLS1_1:
#if defined(NO_TLS1_1)
Tcl_AppendResult(interp, "protocol not supported", NULL);
return TCL_ERROR;
#else
ctx = SSL_CTX_new(TLSv1_1_method()); break;
#endif
case TLS_TLS1_2:
#if defined(NO_TLS1_2)
Tcl_AppendResult(interp, "protocol not supported", NULL);
return TCL_ERROR;
#else
ctx = SSL_CTX_new(TLSv1_2_method()); break;
#endif
default:
break;
}
if (ctx == NULL) {
Tcl_AppendResult(interp, REASON(), (char *) NULL);
return TCL_ERROR;
}
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int server = 0; /* is connection incoming or outgoing? */
char *key = NULL;
char *cert = NULL;
char *ciphers = NULL;
char *CAfile = NULL;
char *CAdir = NULL;
char *model = NULL;
#ifndef OPENSSL_NO_TLSEXT
char *servername = NULL; /* hostname for Server Name Indication */
#endif
#if defined(NO_SSL2)
int ssl2 = 0;
#else
int ssl2 = 1;
#endif
#if defined(NO_SSL3)
int ssl3 = 0;
#else
int ssl3 = 1;
#endif
#if defined(NO_SSL2) && defined(NO_SSL3)
#else
int tls1 = 0;
#endif
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OPTOBJ( "-command", script);
OPTSTR( "-keyfile", key);
OPTSTR( "-model", model);
OPTOBJ( "-password", password);
OPTBOOL( "-require", require);
OPTBOOL( "-request", request);
OPTBOOL( "-server", server);
#ifndef OPENSSL_NO_TLSEXT
OPTSTR( "-servername", servername);
#endif
OPTBOOL( "-ssl2", ssl2);
OPTBOOL( "-ssl3", ssl3);
OPTBOOL( "-tls1", tls1);
OPTBOOL( "-tls1.1", tls1_1);
OPTBOOL( "-tls1.2", tls1_2);
OPTBAD( "option", "-cadir, -cafile, -certfile, -cipher, -command, -keyfile, -model, -password, -require, -request, -server, -ssl2, -ssl3, or -tls1");
OPTBAD( "option", "-cadir, -cafile, -certfile, -cipher, -command, -keyfile, -model, -password, -require, -request, -server, -servername, -ssl2, -ssl3, -tls1, -tls1.1 or -tls1.2");
return TCL_ERROR;
}
if (request) verify |= SSL_VERIFY_CLIENT_ONCE | SSL_VERIFY_PEER;
if (request && require) verify |= SSL_VERIFY_FAIL_IF_NO_PEER_CERT;
if (verify == 0) verify = SSL_VERIFY_NONE;
proto |= (ssl2 ? TLS_PROTO_SSL2 : 0);
proto |= (ssl3 ? TLS_PROTO_SSL3 : 0);
proto |= (tls1 ? TLS_PROTO_TLS1 : 0);
proto |= (tls1_1 ? TLS_PROTO_TLS1_1 : 0);
proto |= (tls1_2 ? TLS_PROTO_TLS1_2 : 0);
/* reset to NULL if blank string provided */
if (cert && !*cert) cert = NULL;
if (key && !*key) key = NULL;
if (ciphers && !*ciphers) ciphers = NULL;
if (CAfile && !*CAfile) CAfile = NULL;
if (CAdir && !*CAdir) CAdir = NULL;
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if (!statePtr->ssl) {
/* SSL library error */
Tcl_AppendResult(interp, "couldn't construct ssl session: ", REASON(),
(char *) NULL);
Tls_Free((char *) statePtr);
return TCL_ERROR;
}
#ifndef OPENSSL_NO_TLSEXT
if (servername) {
if (!SSL_set_tlsext_host_name(statePtr->ssl, servername) && require) {
Tcl_AppendResult(interp, "setting TLS host name extension failed",
(char *) NULL);
Tls_Free((char *) statePtr);
return TCL_ERROR;
}
}
#endif
/*
* SSL Callbacks
*/
SSL_set_app_data(statePtr->ssl, (VOID *)statePtr); /* point back to us */
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char *ciphers;
{
Tcl_Interp *interp = statePtr->interp;
SSL_CTX *ctx = NULL;
Tcl_DString ds;
Tcl_DString ds1;
int off = 0;
const SSL_METHOD *method;
/* create SSL context */
#if !defined(NO_SSL2) && !defined(NO_SSL3)
if (ENABLED(proto, TLS_PROTO_SSL2) &&
ENABLED(proto, TLS_PROTO_SSL3)) {
ctx = SSL_CTX_new(SSLv23_method());
} else
#endif
if (ENABLED(proto, TLS_PROTO_SSL2)) {
#if defined(NO_SSL2)
Tcl_AppendResult(interp, "protocol not supported", NULL);
return (SSL_CTX *)0;
#else
ctx = SSL_CTX_new(SSLv2_method());
#endif
} else if (ENABLED(proto, TLS_PROTO_TLS1)) {
ctx = SSL_CTX_new(TLSv1_method());
} else if (ENABLED(proto, TLS_PROTO_SSL3)) {
#if defined(NO_SSL3)
Tcl_AppendResult(interp, "protocol not supported", NULL);
return (SSL_CTX *)0;
#else
ctx = SSL_CTX_new(SSLv3_method());
#endif
} else {
off |= (ENABLED(proto, TLS_PROTO_TLS1) ? 0 : SSL_OP_NO_TLSv1);
off |= (ENABLED(proto, TLS_PROTO_SSL2) ? 0 : SSL_OP_NO_SSLv2);
off |= (ENABLED(proto, TLS_PROTO_SSL3) ? 0 : SSL_OP_NO_SSLv3);
if (ENABLED(proto, TLS_PROTO_TLS1)) {
Tcl_AppendResult(interp, "protocol not supported", NULL);
return (SSL_CTX *)0;
}
#endif
#if defined(NO_TLS1_1)
if (ENABLED(proto, TLS_PROTO_TLS1_1)) {
Tcl_AppendResult(interp, "protocol not supported", NULL);
return (SSL_CTX *)0;
}
#endif
#if defined(NO_TLS1_2)
if (ENABLED(proto, TLS_PROTO_TLS1_2)) {
Tcl_AppendResult(interp, "protocol not supported", NULL);
return (SSL_CTX *)0;
}
#endif
switch (proto) {
#if !defined(NO_SSL2)
case TLS_PROTO_SSL2:
method = SSLv2_method ();
break;
#endif
#if !defined(NO_SSL3)
case TLS_PROTO_SSL3:
method = SSLv3_method ();
break;
#endif
#if !defined(NO_TLS1)
case TLS_PROTO_TLS1:
method = TLSv1_method ();
break;
#endif
#if !defined(NO_TLS1_1)
case TLS_PROTO_TLS1_1:
method = TLSv1_1_method ();
break;
#endif
#if !defined(NO_TLS1_2)
case TLS_PROTO_TLS1_2:
method = TLSv1_2_method ();
break;
#endif
default:
method = SSLv23_method ();
#if !defined(NO_SSL2)
off |= (ENABLED(proto, TLS_PROTO_SSL2) ? 0 : SSL_OP_NO_SSLv2);
#endif
#if !defined(NO_SSL3)
off |= (ENABLED(proto, TLS_PROTO_SSL3) ? 0 : SSL_OP_NO_SSLv3);
#endif
#if !defined(NO_TLS1)
off |= (ENABLED(proto, TLS_PROTO_TLS1) ? 0 : SSL_OP_NO_TLSv1);
#endif
#if !defined(NO_TLS1_1)
off |= (ENABLED(proto, TLS_PROTO_TLS1_1) ? 0 : SSL_OP_NO_TLSv1_1);
#endif
#if !defined(NO_TLS1_2)
off |= (ENABLED(proto, TLS_PROTO_TLS1_2) ? 0 : SSL_OP_NO_TLSv1_2);
#endif
break;
}
ctx = SSL_CTX_new (method);
SSL_CTX_set_app_data( ctx, (VOID*)interp); /* remember the interpreter */
SSL_CTX_set_options( ctx, SSL_OP_ALL); /* all SSL bug workarounds */
SSL_CTX_set_options( ctx, off); /* all SSL bug workarounds */
SSL_CTX_sess_set_cache_size( ctx, 128);
if (ciphers != NULL)
SSL_CTX_set_cipher_list(ctx, ciphers);
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