/* * Copyright (C) 1997-1999 Matt Newman <[email protected]> * some modifications: * Copyright (C) 2000 Ajuba Solutions * Copyright (C) 2002 ActiveState Corporation * Copyright (C) 2004 Starfish Systems * * 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 * * 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) * */ #include "tlsInt.h" #include "tclOpts.h" #include <stdlib.h> #if TCL_MAJOR_VERSION < 9 typedef int Tcl_Size; #endif /* * External functions */ /* * Forward declarations */ #define F2N( key, dsp) \ (((key) == NULL) ? (char *) NULL : \ Tcl_TranslateFileName(interp, (key), (dsp))) #define REASON() ERR_reason_error_string(ERR_get_error()) static void InfoCallback(const SSL *ssl, int where, int ret); static int CiphersObjCmd(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *const objv[]); static int HandshakeObjCmd(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *const objv[]); static int ImportObjCmd(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *const objv[]); static int StatusObjCmd(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *const objv[]); static int VersionObjCmd(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *const objv[]); static int MiscObjCmd(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *const objv[]); static int UnimportObjCmd(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *const objv[]); static SSL_CTX *CTX_Init(State *statePtr, int isServer, int proto, char *key, char *certfile, unsigned char *key_asn1, unsigned char *cert_asn1, int key_asn1_len, int cert_asn1_len, char *CAdir, char *CAfile, char *ciphers, char *DHparams); static int TlsLibInit(int uninitialize); #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 TLS_PROTO_TLS1_3 0x20 #define ENABLED(flag, mask) (((flag) & (mask)) == (mask)) /* * Static data structures */ #ifndef OPENSSL_NO_DH #include "dh_params.h" #endif /* * We lose the tcl password callback when we use the RSA BSAFE SSL-C 1.1.2 * libraries instead of the current OpenSSL libraries. */ #ifdef BSAFE #define PRE_OPENSSL_0_9_4 1 #endif /* * Pre OpenSSL 0.9.4 Compat */ #ifndef STACK_OF #define STACK_OF(x) STACK #define sk_SSL_CIPHER_num(sk) sk_num((sk)) #define sk_SSL_CIPHER_value( sk, index) (SSL_CIPHER*)sk_value((sk), (index)) #endif /* * Thread-Safe TLS Code */ #ifdef TCL_THREADS #define OPENSSL_THREAD_DEFINES #include <openssl/opensslconf.h> #ifdef OPENSSL_THREADS #include <openssl/crypto.h> /* * Threaded operation requires locking callbacks * Based from /crypto/cryptlib.c of OpenSSL and NSOpenSSL. */ static Tcl_Mutex *locks = NULL; static int locksCount = 0; static Tcl_Mutex init_mx; void CryptoThreadLockCallback(int mode, int n, const char *file, int line) { if (mode & CRYPTO_LOCK) { /* This debugging is turned off by default -- it's too noisy. */ /* dprintf("Called to lock (n=%i of %i)", n, locksCount); */ Tcl_MutexLock(&locks[n]); } else { /* dprintf("Called to unlock (n=%i of %i)", n, locksCount); */ Tcl_MutexUnlock(&locks[n]); } /* dprintf("Returning"); */ return; file = file; line = line; } unsigned long CryptoThreadIdCallback(void) { unsigned long ret; dprintf("Called"); ret = (unsigned long) Tcl_GetCurrentThread(); dprintf("Returning %lu", ret); return(ret); } #endif /* OPENSSL_THREADS */ #endif /* TCL_THREADS */ /* *------------------------------------------------------------------- * * InfoCallback -- * * monitors SSL connection process * * Results: * None * * Side effects: * Calls callback (if defined) *------------------------------------------------------------------- */ static void InfoCallback(const SSL *ssl, int where, int ret) { State *statePtr = (State*)SSL_get_app_data((SSL *)ssl); Tcl_Obj *cmdPtr; char *major; char *minor; dprintf("Called"); if (statePtr->callback == (Tcl_Obj*)NULL) return; cmdPtr = Tcl_DuplicateObj(statePtr->callback); #if 0 if (where & SSL_CB_ALERT) { sev = SSL_alert_type_string_long(ret); if (strcmp( sev, "fatal")==0) { /* Map to error */ Tls_Error(statePtr, SSL_ERROR(ssl, 0)); return; } } #endif if (where & SSL_CB_HANDSHAKE_START) { major = "handshake"; minor = "start"; } else if (where & SSL_CB_HANDSHAKE_DONE) { major = "handshake"; minor = "done"; } else { if (where & SSL_CB_ALERT) major = "alert"; else if (where & SSL_ST_CONNECT) major = "connect"; else if (where & SSL_ST_ACCEPT) major = "accept"; else major = "unknown"; if (where & SSL_CB_READ) minor = "read"; else if (where & SSL_CB_WRITE) minor = "write"; else if (where & SSL_CB_LOOP) minor = "loop"; else if (where & SSL_CB_EXIT) minor = "exit"; else minor = "unknown"; } Tcl_ListObjAppendElement( statePtr->interp, cmdPtr, Tcl_NewStringObj( "info", -1)); Tcl_ListObjAppendElement( statePtr->interp, cmdPtr, Tcl_NewStringObj( Tcl_GetChannelName(statePtr->self), -1) ); Tcl_ListObjAppendElement( statePtr->interp, cmdPtr, Tcl_NewStringObj( major, -1) ); Tcl_ListObjAppendElement( statePtr->interp, cmdPtr, Tcl_NewStringObj( minor, -1) ); if (where & (SSL_CB_LOOP|SSL_CB_EXIT)) { Tcl_ListObjAppendElement( statePtr->interp, cmdPtr, Tcl_NewStringObj( SSL_state_string_long(ssl), -1) ); } else if (where & SSL_CB_ALERT) { const char *cp = (char *) SSL_alert_desc_string_long(ret); Tcl_ListObjAppendElement( statePtr->interp, cmdPtr, Tcl_NewStringObj( cp, -1) ); } else { Tcl_ListObjAppendElement( statePtr->interp, cmdPtr, Tcl_NewStringObj( SSL_state_string_long(ssl), -1) ); } Tcl_Preserve( (ClientData) statePtr->interp); Tcl_Preserve( (ClientData) statePtr); Tcl_IncrRefCount( cmdPtr); (void) Tcl_EvalObjEx(statePtr->interp, cmdPtr, TCL_EVAL_GLOBAL); Tcl_DecrRefCount( cmdPtr); Tcl_Release( (ClientData) statePtr); Tcl_Release( (ClientData) statePtr->interp); } /* *------------------------------------------------------------------- * * VerifyCallback -- * * Monitors SSL certificate validation process. * This is called whenever a certificate is inspected * or decided invalid. * * Results: * A callback bound to the socket may return one of: * 0 - the certificate is deemed invalid * 1 - the certificate is deemed valid * empty string - no change to certificate validation * * Side effects: * The err field of the currently operative State is set * to a string describing the SSL negotiation failure reason *------------------------------------------------------------------- */ static int VerifyCallback(int ok, X509_STORE_CTX *ctx) { Tcl_Obj *cmdPtr, *result; char *errStr, *string; Tcl_Size length; SSL *ssl = (SSL*)X509_STORE_CTX_get_ex_data(ctx, SSL_get_ex_data_X509_STORE_CTX_idx()); X509 *cert = X509_STORE_CTX_get_current_cert(ctx); State *statePtr = (State*)SSL_get_app_data(ssl); int depth = X509_STORE_CTX_get_error_depth(ctx); int err = X509_STORE_CTX_get_error(ctx); dprintf("Verify: %d", ok); if (!ok) { errStr = (char*)X509_verify_cert_error_string(err); } else { errStr = (char *)0; } if (statePtr->callback == (Tcl_Obj*)NULL) { if (statePtr->vflags & SSL_VERIFY_FAIL_IF_NO_PEER_CERT) { return ok; } else { return 1; } } cmdPtr = Tcl_DuplicateObj(statePtr->callback); Tcl_ListObjAppendElement( statePtr->interp, cmdPtr, Tcl_NewStringObj( "verify", -1)); Tcl_ListObjAppendElement( statePtr->interp, cmdPtr, Tcl_NewStringObj( Tcl_GetChannelName(statePtr->self), -1) ); Tcl_ListObjAppendElement( statePtr->interp, cmdPtr, Tcl_NewIntObj( depth) ); Tcl_ListObjAppendElement( statePtr->interp, cmdPtr, Tls_NewX509Obj( statePtr->interp, cert) ); Tcl_ListObjAppendElement( statePtr->interp, cmdPtr, Tcl_NewIntObj( ok) ); Tcl_ListObjAppendElement( statePtr->interp, cmdPtr, Tcl_NewStringObj( errStr ? errStr : "", -1) ); Tcl_Preserve( (ClientData) statePtr->interp); Tcl_Preserve( (ClientData) statePtr); statePtr->flags |= TLS_TCL_CALLBACK; Tcl_IncrRefCount( cmdPtr); if (Tcl_EvalObjEx(statePtr->interp, cmdPtr, TCL_EVAL_GLOBAL) != TCL_OK) { /* It got an error - reject the certificate. */ Tcl_BackgroundError( statePtr->interp); ok = 0; } else { result = Tcl_GetObjResult(statePtr->interp); string = Tcl_GetStringFromObj(result, &length); /* An empty result leaves verification unchanged. */ if (string != NULL && length > 0) { if (Tcl_GetIntFromObj(statePtr->interp, result, &ok) != TCL_OK) { Tcl_BackgroundError(statePtr->interp); ok = 0; } } } Tcl_DecrRefCount( cmdPtr); statePtr->flags &= ~(TLS_TCL_CALLBACK); Tcl_Release( (ClientData) statePtr); Tcl_Release( (ClientData) statePtr->interp); return(ok); /* By default, leave verification unchanged. */ } /* *------------------------------------------------------------------- * * Tls_Error -- * * Calls callback with $fd and $msg - so the callback can decide * what to do with errors. * * Side effects: * The err field of the currently operative State is set * to a string describing the SSL negotiation failure reason *------------------------------------------------------------------- */ void Tls_Error(State *statePtr, char *msg) { Tcl_Obj *cmdPtr; dprintf("Called"); if (msg && *msg) { Tcl_SetErrorCode(statePtr->interp, "SSL", msg, (char *)NULL); } else { msg = Tcl_GetStringFromObj(Tcl_GetObjResult(statePtr->interp), (Tcl_Size *)NULL); } statePtr->err = msg; if (statePtr->callback == (Tcl_Obj*)NULL) { char buf[BUFSIZ]; sprintf(buf, "SSL channel \"%s\": error: %s", Tcl_GetChannelName(statePtr->self), msg); Tcl_SetResult( statePtr->interp, buf, TCL_VOLATILE); Tcl_BackgroundError( statePtr->interp); return; } cmdPtr = Tcl_DuplicateObj(statePtr->callback); Tcl_ListObjAppendElement(statePtr->interp, cmdPtr, Tcl_NewStringObj("error", -1)); Tcl_ListObjAppendElement(statePtr->interp, cmdPtr, Tcl_NewStringObj(Tcl_GetChannelName(statePtr->self), -1)); Tcl_ListObjAppendElement(statePtr->interp, cmdPtr, Tcl_NewStringObj(msg, -1)); Tcl_Preserve((ClientData) statePtr->interp); Tcl_Preserve((ClientData) statePtr); Tcl_IncrRefCount(cmdPtr); if (Tcl_EvalObjEx(statePtr->interp, cmdPtr, TCL_EVAL_GLOBAL) != TCL_OK) { Tcl_BackgroundError(statePtr->interp); } Tcl_DecrRefCount(cmdPtr); Tcl_Release((ClientData) statePtr); Tcl_Release((ClientData) statePtr->interp); } /* *------------------------------------------------------------------- * * PasswordCallback -- * * Called when a password is needed to unpack RSA and PEM keys. * Evals any bound password script and returns the result as * the password string. *------------------------------------------------------------------- */ #ifdef PRE_OPENSSL_0_9_4 /* * No way to handle user-data therefore no way without a global * variable to access the Tcl interpreter. */ static int PasswordCallback(char *buf, int size, int verify) { return -1; buf = buf; size = size; verify = verify; } #else static int PasswordCallback(char *buf, int size, int verify, void *udata) { State *statePtr = (State *) udata; Tcl_Interp *interp = statePtr->interp; Tcl_Obj *cmdPtr; int result; dprintf("Called"); if (statePtr->password == NULL) { if (Tcl_EvalEx(interp, "tls::password", -1, TCL_EVAL_GLOBAL) == TCL_OK) { char *ret = (char *) Tcl_GetStringResult(interp); strncpy(buf, ret, (size_t) size); return (int)strlen(ret); } else { return -1; } } cmdPtr = Tcl_DuplicateObj(statePtr->password); Tcl_Preserve((ClientData) statePtr->interp); Tcl_Preserve((ClientData) statePtr); Tcl_IncrRefCount(cmdPtr); result = Tcl_EvalObjEx(interp, cmdPtr, TCL_EVAL_GLOBAL); if (result != TCL_OK) { Tcl_BackgroundError(statePtr->interp); } Tcl_DecrRefCount(cmdPtr); Tcl_Release((ClientData) statePtr); Tcl_Release((ClientData) statePtr->interp); if (result == TCL_OK) { char *ret = (char *) Tcl_GetStringResult(interp); strncpy(buf, ret, (size_t) size); return (int)strlen(ret); } else { return -1; } verify = verify; } #endif /* *------------------------------------------------------------------- * * CiphersObjCmd -- list available ciphers * * This procedure is invoked to process the "tls::ciphers" command * to list available ciphers, based upon protocol selected. * * Results: * A standard Tcl result list. * * Side effects: * constructs and destroys SSL context (CTX) * *------------------------------------------------------------------- */ static int CiphersObjCmd(clientData, interp, objc, objv) ClientData clientData; /* Not used. */ Tcl_Interp *interp; int objc; Tcl_Obj *const objv[]; { static const char *protocols[] = { "ssl2", "ssl3", "tls1", "tls1.1", "tls1.2", "tls1.3", NULL }; enum protocol { TLS_SSL2, TLS_SSL3, TLS_TLS1, TLS_TLS1_1, TLS_TLS1_2, TLS_TLS1_3, 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; dprintf("Called"); if (objc < 2 || objc > 3) { Tcl_WrongNumArgs(interp, 1, objv, "protocol ?verbose?"); return TCL_ERROR; } if (Tcl_GetIndexFromObj( interp, objv[1], protocols, "protocol", 0, &index) != TCL_OK) { return TCL_ERROR; } if (objc > 2 && Tcl_GetBooleanFromObj( interp, objv[2], &verbose) != TCL_OK) { return TCL_ERROR; } switch ((enum protocol)index) { case TLS_SSL2: #if defined(NO_SSL2) Tcl_AppendResult(interp, "protocol not supported", NULL); return TCL_ERROR; #else ctx = SSL_CTX_new(SSLv2_method()); break; #endif case TLS_SSL3: #if defined(NO_SSL3) Tcl_AppendResult(interp, "protocol not supported", NULL); return TCL_ERROR; #else ctx = SSL_CTX_new(SSLv3_method()); break; #endif 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 case TLS_TLS1_3: #if defined(NO_TLS1_3) Tcl_AppendResult(interp, "protocol not supported", NULL); return TCL_ERROR; #else ctx = SSL_CTX_new(TLS_method()); break; SSL_CTX_set_min_proto_version (ctx, TLS1_3_VERSION); SSL_CTX_set_max_proto_version (ctx, TLS1_3_VERSION); #endif default: break; } if (ctx == NULL) { Tcl_AppendResult(interp, REASON(), (char *) NULL); return TCL_ERROR; } ssl = SSL_new(ctx); if (ssl == NULL) { Tcl_AppendResult(interp, REASON(), (char *) NULL); SSL_CTX_free(ctx); return TCL_ERROR; } objPtr = Tcl_NewListObj( 0, NULL); if (!verbose) { for (index = 0; ; index++) { cp = (char*)SSL_get_cipher_list( ssl, index); if (cp == NULL) break; Tcl_ListObjAppendElement( interp, objPtr, Tcl_NewStringObj( cp, -1) ); } } else { sk = SSL_get_ciphers(ssl); for (index = 0; index < sk_SSL_CIPHER_num(sk); index++) { register size_t i; SSL_CIPHER_description( sk_SSL_CIPHER_value( sk, index), buf, sizeof(buf)); for (i = strlen(buf) - 1; i ; i--) { if (buf[i] == ' ' || buf[i] == '\n' || buf[i] == '\r' || buf[i] == '\t') { buf[i] = '\0'; } else { break; } } Tcl_ListObjAppendElement( interp, objPtr, Tcl_NewStringObj( buf, -1) ); } } SSL_free(ssl); SSL_CTX_free(ctx); Tcl_SetObjResult( interp, objPtr); return TCL_OK; clientData = clientData; } /* *------------------------------------------------------------------- * * HandshakeObjCmd -- * * This command is used to verify whether the handshake is complete * or not. * * Results: * A standard Tcl result. 1 means handshake complete, 0 means pending. * * Side effects: * May force SSL negotiation to take place. * *------------------------------------------------------------------- */ static int HandshakeObjCmd(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *const objv[]) { Tcl_Channel chan; /* The channel to set a mode on. */ State *statePtr; /* client state for ssl socket */ const char *errStr = NULL; int ret = 1; int err = 0; dprintf("Called"); if (objc != 2) { Tcl_WrongNumArgs(interp, 1, objv, "channel"); return(TCL_ERROR); } chan = Tcl_GetChannel(interp, Tcl_GetStringFromObj(objv[1], (Tcl_Size *)NULL), NULL); if (chan == (Tcl_Channel) NULL) { return(TCL_ERROR); } /* * Make sure to operate on the topmost channel */ chan = Tcl_GetTopChannel(chan); if (Tcl_GetChannelType(chan) != Tls_ChannelType()) { Tcl_AppendResult(interp, "bad channel \"", Tcl_GetChannelName(chan), "\": not a TLS channel", NULL); return(TCL_ERROR); } statePtr = (State *)Tcl_GetChannelInstanceData(chan); dprintf("Calling Tls_WaitForConnect"); ret = Tls_WaitForConnect(statePtr, &err, 1); dprintf("Tls_WaitForConnect returned: %i", ret); if ( ret < 0 && \ ((statePtr->flags & TLS_TCL_ASYNC) && err == EAGAIN) ) { dprintf("Async set and err = EAGAIN"); ret = 0; } else if (ret < 0) { errStr = statePtr->err; Tcl_ResetResult(interp); Tcl_SetErrno(err); if (!errStr || *errStr == 0) { errStr = Tcl_PosixError(interp); } Tcl_AppendResult(interp, "handshake failed: ", errStr, (char *) NULL); dprintf("Returning TCL_ERROR with handshake failed: %s", errStr); return(TCL_ERROR); } else { if (err != 0) { dprintf("Got an error with a completed handshake: err = %i", err); } ret = 1; } dprintf("Returning TCL_OK with data \"%i\"", ret); Tcl_SetObjResult(interp, Tcl_NewIntObj(ret)); return(TCL_OK); clientData = clientData; } /* *------------------------------------------------------------------- * * ImportObjCmd -- * * This procedure is invoked to process the "ssl" command * * The ssl command pushes SSL over a (newly connected) tcp socket * * Results: * A standard Tcl result. * * Side effects: * May modify the behavior of an IO channel. * *------------------------------------------------------------------- */ static int ImportObjCmd(clientData, interp, objc, objv) ClientData clientData; /* Not used. */ Tcl_Interp *interp; int objc; Tcl_Obj *const objv[]; { Tcl_Channel chan; /* The channel to set a mode on. */ State *statePtr; /* client state for ssl socket */ SSL_CTX *ctx = NULL; Tcl_Obj *script = NULL; Tcl_Obj *password = NULL; Tcl_DString upperChannelTranslation, upperChannelBlocking, upperChannelEncoding, upperChannelEOFChar; int idx, len; int flags = TLS_TCL_INIT; int server = 0; /* is connection incoming or outgoing? */ char *keyfile = NULL; char *certfile = NULL; unsigned char *key = NULL; int key_len = 0; unsigned char *cert = NULL; int cert_len = 0; char *ciphers = NULL; char *CAfile = NULL; char *CAdir = NULL; char *DHparams = NULL; char *model = NULL; #ifndef OPENSSL_NO_TLSEXT char *servername = NULL; /* hostname for Server Name Indication */ #endif int ssl2 = 0, ssl3 = 0; int tls1 = 1, tls1_1 = 1, tls1_2 = 1, tls1_3 = 1; int proto = 0; int verify = 0, require = 0, request = 1; dprintf("Called"); #if defined(NO_TLS1) && defined(NO_TLS1_1) && defined(NO_TLS1_2) && defined(NO_SSL3) && !defined(NO_SSL2) ssl2 = 1; #endif #if defined(NO_TLS1) && defined(NO_TLS1_1) && defined(NO_TLS1_2) && defined(NO_SSL2) && !defined(NO_SSL3) ssl3 = 1; #endif #if defined(NO_TLS1) tls1 = 0; #endif #if defined(NO_TLS1_1) tls1_1 = 0; #endif #if defined(NO_TLS1_2) tls1_2 = 0; #endif #if defined(NO_TLS1_3) tls1_3 = 0; #endif if (objc < 2) { Tcl_WrongNumArgs(interp, 1, objv, "channel ?options?"); return TCL_ERROR; } chan = Tcl_GetChannel(interp, Tcl_GetStringFromObj(objv[1], (Tcl_Size *) NULL), NULL); if (chan == (Tcl_Channel) NULL) { return TCL_ERROR; } /* * Make sure to operate on the topmost channel */ chan = Tcl_GetTopChannel(chan); for (idx = 2; idx < objc; idx++) { char *opt = Tcl_GetStringFromObj(objv[idx], (Tcl_Size *)NULL); if (opt[0] != '-') break; OPTSTR( "-cadir", CAdir); OPTSTR( "-cafile", CAfile); OPTSTR( "-certfile", certfile); OPTSTR( "-cipher", ciphers); OPTOBJ( "-command", script); OPTSTR( "-dhparams", DHparams); OPTSTR( "-keyfile", keyfile); 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); OPTBOOL( "-tls1.3", tls1_3); OPTBYTE("-cert", cert, cert_len); OPTBYTE("-key", key, key_len); OPTBAD( "option", "-cadir, -cafile, -cert, -certfile, -cipher, -command, -dhparams, -key, -keyfile, -model, -password, -require, -request, -server, -servername, -ssl2, -ssl3, -tls1, -tls1.1, -tls1.2, or tls1.3"); 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); proto |= (tls1_3 ? TLS_PROTO_TLS1_3 : 0); /* reset to NULL if blank string provided */ if (cert && !*cert) cert = NULL; if (key && !*key) key = NULL; if (certfile && !*certfile) certfile = NULL; if (keyfile && !*keyfile) keyfile = NULL; if (ciphers && !*ciphers) ciphers = NULL; if (CAfile && !*CAfile) CAfile = NULL; if (CAdir && !*CAdir) CAdir = NULL; if (DHparams && !*DHparams) DHparams = NULL; /* new SSL state */ statePtr = (State *) ckalloc((unsigned) sizeof(State)); memset(statePtr, 0, sizeof(State)); statePtr->flags = flags; statePtr->interp = interp; statePtr->vflags = verify; statePtr->err = ""; /* allocate script */ if (script) { (void) Tcl_GetStringFromObj(script, &len); if (len) { statePtr->callback = script; Tcl_IncrRefCount(statePtr->callback); } } /* allocate password */ if (password) { (void) Tcl_GetStringFromObj(password, &len); if (len) { statePtr->password = password; Tcl_IncrRefCount(statePtr->password); } } if (model != NULL) { int mode; /* Get the "model" context */ chan = Tcl_GetChannel(interp, model, &mode); if (chan == (Tcl_Channel) NULL) { Tls_Free((char *) statePtr); return TCL_ERROR; } /* * Make sure to operate on the topmost channel */ chan = Tcl_GetTopChannel(chan); if (Tcl_GetChannelType(chan) != Tls_ChannelType()) { Tcl_AppendResult(interp, "bad channel \"", Tcl_GetChannelName(chan), "\": not a TLS channel", NULL); Tls_Free((char *) statePtr); return TCL_ERROR; } ctx = ((State *)Tcl_GetChannelInstanceData(chan))->ctx; } else { if ((ctx = CTX_Init(statePtr, server, proto, keyfile, certfile, key, cert, key_len, cert_len, CAdir, CAfile, ciphers, DHparams)) == (SSL_CTX*)0) { Tls_Free((char *) statePtr); return TCL_ERROR; } } statePtr->ctx = ctx; /* * We need to make sure that the channel works in binary (for the * encryption not to get goofed up). * We only want to adjust the buffering in pre-v2 channels, where * each channel in the stack maintained its own buffers. */ Tcl_DStringInit(&upperChannelTranslation); Tcl_DStringInit(&upperChannelBlocking); Tcl_DStringInit(&upperChannelEOFChar); Tcl_DStringInit(&upperChannelEncoding); Tcl_GetChannelOption(interp, chan, "-eofchar", &upperChannelEOFChar); Tcl_GetChannelOption(interp, chan, "-encoding", &upperChannelEncoding); Tcl_GetChannelOption(interp, chan, "-translation", &upperChannelTranslation); Tcl_GetChannelOption(interp, chan, "-blocking", &upperChannelBlocking); Tcl_SetChannelOption(interp, chan, "-translation", "binary"); Tcl_SetChannelOption(interp, chan, "-blocking", "true"); dprintf("Consuming Tcl channel %s", Tcl_GetChannelName(chan)); statePtr->self = Tcl_StackChannel(interp, Tls_ChannelType(), (ClientData) statePtr, (TCL_READABLE | TCL_WRITABLE), chan); dprintf("Created channel named %s", Tcl_GetChannelName(statePtr->self)); if (statePtr->self == (Tcl_Channel) NULL) { /* * No use of Tcl_EventuallyFree because no possible Tcl_Preserve. */ Tls_Free((char *) statePtr); return TCL_ERROR; } Tcl_SetChannelOption(interp, statePtr->self, "-translation", Tcl_DStringValue(&upperChannelTranslation)); Tcl_SetChannelOption(interp, statePtr->self, "-encoding", Tcl_DStringValue(&upperChannelEncoding)); Tcl_SetChannelOption(interp, statePtr->self, "-eofchar", Tcl_DStringValue(&upperChannelEOFChar)); Tcl_SetChannelOption(interp, statePtr->self, "-blocking", Tcl_DStringValue(&upperChannelBlocking)); /* * SSL Initialization */ statePtr->ssl = SSL_new(statePtr->ctx); 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 */ SSL_set_verify(statePtr->ssl, verify, VerifyCallback); SSL_CTX_set_info_callback(statePtr->ctx, InfoCallback); /* Create Tcl_Channel BIO Handler */ statePtr->p_bio = BIO_new_tcl(statePtr, BIO_NOCLOSE); statePtr->bio = BIO_new(BIO_f_ssl()); if (server) { statePtr->flags |= TLS_TCL_SERVER; SSL_set_accept_state(statePtr->ssl); } else { SSL_set_connect_state(statePtr->ssl); } SSL_set_bio(statePtr->ssl, statePtr->p_bio, statePtr->p_bio); BIO_set_ssl(statePtr->bio, statePtr->ssl, BIO_NOCLOSE); /* * End of SSL Init */ dprintf("Returning %s", Tcl_GetChannelName(statePtr->self)); Tcl_SetResult(interp, (char *) Tcl_GetChannelName(statePtr->self), TCL_VOLATILE); return TCL_OK; clientData = clientData; } /* *------------------------------------------------------------------- * * UnimportObjCmd -- * * This procedure is invoked to remove the topmost channel filter. * * Results: * A standard Tcl result. * * Side effects: * May modify the behavior of an IO channel. * *------------------------------------------------------------------- */ static int UnimportObjCmd(clientData, interp, objc, objv) ClientData clientData; /* Not used. */ Tcl_Interp *interp; int objc; Tcl_Obj *const objv[]; { Tcl_Channel chan; /* The channel to set a mode on. */ dprintf("Called"); if (objc != 2) { Tcl_WrongNumArgs(interp, 1, objv, "channel"); return TCL_ERROR; } chan = Tcl_GetChannel(interp, Tcl_GetString(objv[1]), NULL); if (chan == (Tcl_Channel) NULL) { return TCL_ERROR; } /* * Make sure to operate on the topmost channel */ chan = Tcl_GetTopChannel(chan); if (Tcl_GetChannelType(chan) != Tls_ChannelType()) { Tcl_AppendResult(interp, "bad channel \"", Tcl_GetChannelName(chan), "\": not a TLS channel", NULL); return TCL_ERROR; } if (Tcl_UnstackChannel(interp, chan) == TCL_ERROR) { return TCL_ERROR; } return TCL_OK; clientData = clientData; } /* *------------------------------------------------------------------- * * CTX_Init -- construct a SSL_CTX instance * * Results: * A valid SSL_CTX instance or NULL. * * Side effects: * constructs SSL context (CTX) * *------------------------------------------------------------------- */ static SSL_CTX * CTX_Init(statePtr, isServer, proto, keyfile, certfile, key, cert, key_len, cert_len, CAdir, CAfile, ciphers, DHparams) State *statePtr; int isServer; int proto; char *keyfile; char *certfile; unsigned char *key; unsigned char *cert; int key_len; int cert_len; char *CAdir; char *CAfile; char *ciphers; char *DHparams; { Tcl_Interp *interp = statePtr->interp; SSL_CTX *ctx = NULL; Tcl_DString ds; Tcl_DString ds1; int off = 0; int load_private_key; const SSL_METHOD *method; dprintf("Called"); if (!proto) { Tcl_AppendResult(interp, "no valid protocol selected", NULL); return (SSL_CTX *)0; } /* create SSL context */ #if defined(NO_SSL2) if (ENABLED(proto, TLS_PROTO_SSL2)) { Tcl_AppendResult(interp, "protocol not supported", NULL); return (SSL_CTX *)0; } #endif #if defined(NO_SSL3) if (ENABLED(proto, TLS_PROTO_SSL3)) { Tcl_AppendResult(interp, "protocol not supported", NULL); return (SSL_CTX *)0; } #endif #if defined(NO_TLS1) 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 #if defined(NO_TLS1_3) if (ENABLED(proto, TLS_PROTO_TLS1_3)) { 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 #if !defined(NO_TLS1_3) case TLS_PROTO_TLS1_3: /* * The version range is constrained below, * after the context is created. Use the * generic method here. */ method = TLS_method (); break; #endif default: #ifdef HAVE_TLS_METHOD method = TLS_method (); #else method = SSLv23_method (); #endif #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 #if !defined(NO_TLS1_3) off |= (ENABLED(proto, TLS_PROTO_TLS1_3) ? 0 : SSL_OP_NO_TLSv1_3); #endif break; } ctx = SSL_CTX_new (method); if (!ctx) { return(NULL); } #if !defined(NO_TLS1_3) if (proto == TLS_PROTO_TLS1_3) { SSL_CTX_set_min_proto_version (ctx, TLS1_3_VERSION); SSL_CTX_set_max_proto_version (ctx, TLS1_3_VERSION); } #endif 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); /* set some callbacks */ SSL_CTX_set_default_passwd_cb(ctx, PasswordCallback); #ifndef BSAFE SSL_CTX_set_default_passwd_cb_userdata(ctx, (void *)statePtr); #endif /* read a Diffie-Hellman parameters file, or use the built-in one */ #ifdef OPENSSL_NO_DH if (DHparams != NULL) { Tcl_AppendResult(interp, "DH parameter support not available", (char *) NULL); SSL_CTX_free(ctx); return (SSL_CTX *)0; } #else { DH* dh; if (DHparams != NULL) { BIO *bio; Tcl_DStringInit(&ds); bio = BIO_new_file(F2N(DHparams, &ds), "r"); if (!bio) { Tcl_DStringFree(&ds); Tcl_AppendResult(interp, "Could not find DH parameters file", (char *) NULL); SSL_CTX_free(ctx); return (SSL_CTX *)0; } dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL); BIO_free(bio); Tcl_DStringFree(&ds); if (!dh) { Tcl_AppendResult(interp, "Could not read DH parameters from file", (char *) NULL); SSL_CTX_free(ctx); return (SSL_CTX *)0; } } else { dh = get_dhParams(); } SSL_CTX_set_tmp_dh(ctx, dh); DH_free(dh); } #endif /* set our certificate */ load_private_key = 0; if (certfile != NULL) { load_private_key = 1; Tcl_DStringInit(&ds); if (SSL_CTX_use_certificate_file(ctx, F2N( certfile, &ds), SSL_FILETYPE_PEM) <= 0) { Tcl_DStringFree(&ds); Tcl_AppendResult(interp, "unable to set certificate file ", certfile, ": ", REASON(), (char *) NULL); SSL_CTX_free(ctx); return (SSL_CTX *)0; } } else if (cert != NULL) { load_private_key = 1; if (SSL_CTX_use_certificate_ASN1(ctx, cert_len, cert) <= 0) { Tcl_DStringFree(&ds); Tcl_AppendResult(interp, "unable to set certificate: ", REASON(), (char *) NULL); SSL_CTX_free(ctx); return (SSL_CTX *)0; } } else { certfile = (char*)X509_get_default_cert_file(); if (SSL_CTX_use_certificate_file(ctx, certfile, SSL_FILETYPE_PEM) <= 0) { #if 0 Tcl_DStringFree(&ds); Tcl_AppendResult(interp, "unable to use default certificate file ", certfile, ": ", REASON(), (char *) NULL); SSL_CTX_free(ctx); return (SSL_CTX *)0; #endif } } /* set our private key */ if (load_private_key) { if (keyfile == NULL && key == NULL) { keyfile = certfile; } if (keyfile != NULL) { /* get the private key associated with this certificate */ if (keyfile == NULL) { keyfile = certfile; } if (SSL_CTX_use_PrivateKey_file(ctx, F2N( keyfile, &ds), SSL_FILETYPE_PEM) <= 0) { Tcl_DStringFree(&ds); /* flush the passphrase which might be left in the result */ Tcl_SetResult(interp, NULL, TCL_STATIC); Tcl_AppendResult(interp, "unable to set public key file ", keyfile, " ", REASON(), (char *) NULL); SSL_CTX_free(ctx); return (SSL_CTX *)0; } Tcl_DStringFree(&ds); } else if (key != NULL) { if (SSL_CTX_use_PrivateKey_ASN1(EVP_PKEY_RSA, ctx, key,key_len) <= 0) { Tcl_DStringFree(&ds); /* flush the passphrase which might be left in the result */ Tcl_SetResult(interp, NULL, TCL_STATIC); Tcl_AppendResult(interp, "unable to set public key: ", REASON(), (char *) NULL); SSL_CTX_free(ctx); return (SSL_CTX *)0; } } /* Now we know that a key and cert have been set against * the SSL context */ if (!SSL_CTX_check_private_key(ctx)) { Tcl_AppendResult(interp, "private key does not match the certificate public key", (char *) NULL); SSL_CTX_free(ctx); return (SSL_CTX *)0; } } /* Set verification CAs */ Tcl_DStringInit(&ds); Tcl_DStringInit(&ds1); if (!SSL_CTX_load_verify_locations(ctx, F2N(CAfile, &ds), F2N(CAdir, &ds1)) || !SSL_CTX_set_default_verify_paths(ctx)) { #if 0 Tcl_DStringFree(&ds); Tcl_DStringFree(&ds1); /* Don't currently care if this fails */ Tcl_AppendResult(interp, "SSL default verify paths: ", REASON(), (char *) NULL); SSL_CTX_free(ctx); return (SSL_CTX *)0; #endif } /* https://sourceforge.net/p/tls/bugs/57/ */ /* XXX:TODO: Let the user supply values here instead of something that exists on the filesystem */ if ( CAfile != NULL ) { STACK_OF(X509_NAME) *certNames = SSL_load_client_CA_file( F2N(CAfile, &ds) ); if ( certNames != NULL ) { SSL_CTX_set_client_CA_list(ctx, certNames ); } } Tcl_DStringFree(&ds); Tcl_DStringFree(&ds1); return ctx; } /* *------------------------------------------------------------------- * * StatusObjCmd -- return certificate for connected peer. * * Results: * A standard Tcl result. * * Side effects: * None. * *------------------------------------------------------------------- */ static int StatusObjCmd(clientData, interp, objc, objv) ClientData clientData; /* Not used. */ Tcl_Interp *interp; int objc; Tcl_Obj *const objv[]; { State *statePtr; X509 *peer; Tcl_Obj *objPtr; Tcl_Channel chan; char *channelName, *ciphers; int mode; dprintf("Called"); switch (objc) { case 2: channelName = Tcl_GetStringFromObj(objv[1], (Tcl_Size *) NULL); break; case 3: if (!strcmp (Tcl_GetString (objv[1]), "-local")) { channelName = Tcl_GetStringFromObj(objv[2], (Tcl_Size *)NULL); break; } /* else fall... */ default: Tcl_WrongNumArgs(interp, 1, objv, "?-local? channel"); return TCL_ERROR; } chan = Tcl_GetChannel(interp, channelName, &mode); if (chan == (Tcl_Channel) NULL) { return TCL_ERROR; } /* * Make sure to operate on the topmost channel */ chan = Tcl_GetTopChannel(chan); if (Tcl_GetChannelType(chan) != Tls_ChannelType()) { Tcl_AppendResult(interp, "bad channel \"", Tcl_GetChannelName(chan), "\": not a TLS channel", NULL); return TCL_ERROR; } statePtr = (State *) Tcl_GetChannelInstanceData(chan); if (objc == 2) { peer = SSL_get_peer_certificate(statePtr->ssl); } else { peer = SSL_get_certificate(statePtr->ssl); } if (peer) { objPtr = Tls_NewX509Obj(interp, peer); if (objc == 2) { X509_free(peer); } } else { objPtr = Tcl_NewListObj(0, NULL); } Tcl_ListObjAppendElement (interp, objPtr, Tcl_NewStringObj ("sbits", -1)); Tcl_ListObjAppendElement (interp, objPtr, Tcl_NewIntObj (SSL_get_cipher_bits (statePtr->ssl, NULL))); ciphers = (char*)SSL_get_cipher(statePtr->ssl); if (ciphers != NULL && strcmp(ciphers, "(NONE)")!=0) { Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj("cipher", -1)); Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj(SSL_get_cipher(statePtr->ssl), -1)); } Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj("version", -1)); Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj(SSL_get_version(statePtr->ssl), -1)); Tcl_SetObjResult( interp, objPtr); return TCL_OK; clientData = clientData; } /* *------------------------------------------------------------------- * * VersionObjCmd -- return version string from OpenSSL. * * Results: * A standard Tcl result. * * Side effects: * None. * *------------------------------------------------------------------- */ static int VersionObjCmd(clientData, interp, objc, objv) ClientData clientData; /* Not used. */ Tcl_Interp *interp; int objc; Tcl_Obj *const objv[]; { Tcl_Obj *objPtr; dprintf("Called"); objPtr = Tcl_NewStringObj(OPENSSL_VERSION_TEXT, -1); Tcl_SetObjResult(interp, objPtr); return TCL_OK; clientData = clientData; objc = objc; objv = objv; } /* *------------------------------------------------------------------- * * MiscObjCmd -- misc commands * * Results: * A standard Tcl result. * * Side effects: * None. * *------------------------------------------------------------------- */ static int MiscObjCmd(clientData, interp, objc, objv) ClientData clientData; /* Not used. */ Tcl_Interp *interp; int objc; Tcl_Obj *const objv[]; { static const char *commands [] = { "req", NULL }; enum command { C_REQ, C_DUMMY }; int cmd; dprintf("Called"); if (objc < 2) { Tcl_WrongNumArgs(interp, 1, objv, "subcommand ?args?"); return TCL_ERROR; } if (Tcl_GetIndexFromObj(interp, objv[1], commands, "command", 0,&cmd) != TCL_OK) { return TCL_ERROR; } switch ((enum command) cmd) { case C_REQ: { EVP_PKEY *pkey=NULL; X509 *cert=NULL; X509_NAME *name=NULL; Tcl_Obj **listv; int listc,i; BIO *out=NULL; char *k_C="",*k_ST="",*k_L="",*k_O="",*k_OU="",*k_CN="",*k_Email=""; char *keyout,*pemout,*str; int keysize,serial=0,days=365; if ((objc<5) || (objc>6)) { Tcl_WrongNumArgs(interp, 2, objv, "keysize keyfile certfile ?info?"); return TCL_ERROR; } if (Tcl_GetIntFromObj(interp, objv[2], &keysize) != TCL_OK) { return TCL_ERROR; } keyout=Tcl_GetString(objv[3]); pemout=Tcl_GetString(objv[4]); if (objc>=6) { if (Tcl_ListObjGetElements(interp, objv[5], &listc, &listv) != TCL_OK) { return TCL_ERROR; } if ((listc%2) != 0) { Tcl_SetResult(interp,"Information list must have even number of arguments",NULL); return TCL_ERROR; } for (i=0; i<listc; i+=2) { str=Tcl_GetString(listv[i]); if (strcmp(str,"days")==0) { if (Tcl_GetIntFromObj(interp,listv[i+1],&days)!=TCL_OK) return TCL_ERROR; } else if (strcmp(str,"serial")==0) { if (Tcl_GetIntFromObj(interp,listv[i+1],&serial)!=TCL_OK) return TCL_ERROR; } else if (strcmp(str,"serial")==0) { if (Tcl_GetIntFromObj(interp,listv[i+1],&serial)!=TCL_OK) return TCL_ERROR; } else if (strcmp(str,"C")==0) { k_C=Tcl_GetString(listv[i+1]); } else if (strcmp(str,"ST")==0) { k_ST=Tcl_GetString(listv[i+1]); } else if (strcmp(str,"L")==0) { k_L=Tcl_GetString(listv[i+1]); } else if (strcmp(str,"O")==0) { k_O=Tcl_GetString(listv[i+1]); } else if (strcmp(str,"OU")==0) { k_OU=Tcl_GetString(listv[i+1]); } else if (strcmp(str,"CN")==0) { k_CN=Tcl_GetString(listv[i+1]); } else if (strcmp(str,"Email")==0) { k_Email=Tcl_GetString(listv[i+1]); } else { Tcl_SetResult(interp,"Unknown parameter",NULL); return TCL_ERROR; } } } if ((pkey = EVP_PKEY_new()) != NULL) { if (!EVP_PKEY_assign_RSA(pkey, RSA_generate_key(keysize, 0x10001, NULL, NULL))) { Tcl_SetResult(interp,"Error generating private key",NULL); EVP_PKEY_free(pkey); return TCL_ERROR; } out=BIO_new(BIO_s_file()); BIO_write_filename(out,keyout); PEM_write_bio_PrivateKey(out,pkey,NULL,NULL,0,NULL,NULL); BIO_free_all(out); if ((cert=X509_new())==NULL) { Tcl_SetResult(interp,"Error generating certificate request",NULL); EVP_PKEY_free(pkey); return(TCL_ERROR); } X509_set_version(cert,2); ASN1_INTEGER_set(X509_get_serialNumber(cert),serial); X509_gmtime_adj(X509_get_notBefore(cert),0); X509_gmtime_adj(X509_get_notAfter(cert),(long)60*60*24*days); X509_set_pubkey(cert,pkey); name=X509_get_subject_name(cert); X509_NAME_add_entry_by_txt(name,"C", MBSTRING_ASC, (unsigned char *) k_C, -1, -1, 0); X509_NAME_add_entry_by_txt(name,"ST", MBSTRING_ASC, (unsigned char *) k_ST, -1, -1, 0); X509_NAME_add_entry_by_txt(name,"L", MBSTRING_ASC, (unsigned char *) k_L, -1, -1, 0); X509_NAME_add_entry_by_txt(name,"O", MBSTRING_ASC, (unsigned char *) k_O, -1, -1, 0); X509_NAME_add_entry_by_txt(name,"OU", MBSTRING_ASC, (unsigned char *) k_OU, -1, -1, 0); X509_NAME_add_entry_by_txt(name,"CN", MBSTRING_ASC, (unsigned char *) k_CN, -1, -1, 0); X509_NAME_add_entry_by_txt(name,"Email", MBSTRING_ASC, (unsigned char *) k_Email, -1, -1, 0); X509_set_subject_name(cert,name); if (!X509_sign(cert,pkey,EVP_md5())) { X509_free(cert); EVP_PKEY_free(pkey); Tcl_SetResult(interp,"Error signing certificate",NULL); return TCL_ERROR; } out=BIO_new(BIO_s_file()); BIO_write_filename(out,pemout); PEM_write_bio_X509(out,cert); BIO_free_all(out); X509_free(cert); EVP_PKEY_free(pkey); } else { Tcl_SetResult(interp,"Error generating private key",NULL); return TCL_ERROR; } } break; default: break; } return TCL_OK; clientData = clientData; } /* *------------------------------------------------------------------- * * Tls_Free -- * * This procedure cleans up when a SSL socket based channel * is closed and its reference count falls below 1 * * Results: * none * * Side effects: * Frees all the state * *------------------------------------------------------------------- */ void Tls_Free( char *blockPtr ) { State *statePtr = (State *)blockPtr; dprintf("Called"); Tls_Clean(statePtr); ckfree(blockPtr); } /* *------------------------------------------------------------------- * * Tls_Clean -- * * This procedure cleans up when a SSL socket based channel * is closed and its reference count falls below 1. This should * be called synchronously by the CloseProc, not in the * EventuallyFree callback. * * Results: * none * * Side effects: * Frees all the state * *------------------------------------------------------------------- */ void Tls_Clean(State *statePtr) { dprintf("Called"); /* * we're assuming here that we're single-threaded */ if (statePtr->timer != (Tcl_TimerToken) NULL) { Tcl_DeleteTimerHandler(statePtr->timer); statePtr->timer = NULL; } if (statePtr->bio) { /* This will call SSL_shutdown. Bug 1414045 */ dprintf("BIO_free_all(%p)", statePtr->bio); BIO_free_all(statePtr->bio); statePtr->bio = NULL; } if (statePtr->ssl) { dprintf("SSL_free(%p)", statePtr->ssl); SSL_free(statePtr->ssl); statePtr->ssl = NULL; } if (statePtr->ctx) { SSL_CTX_free(statePtr->ctx); statePtr->ctx = NULL; } if (statePtr->callback) { Tcl_DecrRefCount(statePtr->callback); statePtr->callback = NULL; } if (statePtr->password) { Tcl_DecrRefCount(statePtr->password); statePtr->password = NULL; } dprintf("Returning"); } /* *------------------------------------------------------------------- * * Tls_Init -- * * This is a package initialization procedure, which is called * by Tcl when this package is to be added to an interpreter. * * Results: Ssl configured and loaded * * Side effects: * create the ssl command, initialise ssl context * *------------------------------------------------------------------- */ int DLLEXPORT Tls_Init(Tcl_Interp *interp) { const char tlsTclInitScript[] = { #include "tls.tcl.h" 0x00 }; dprintf("Called"); /* * We only support Tcl 8.4 or newer */ if ( #ifdef USE_TCL_STUBS Tcl_InitStubs(interp, "8.4", 0) #else Tcl_PkgRequire(interp, "Tcl", "8.4-", 0) #endif == NULL) { return TCL_ERROR; } if (TlsLibInit(0) != 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); Tcl_CreateObjCommand(interp, "tls::import", ImportObjCmd, (ClientData) 0, (Tcl_CmdDeleteProc *) NULL); Tcl_CreateObjCommand(interp, "tls::unimport", UnimportObjCmd, (ClientData) 0, (Tcl_CmdDeleteProc *) NULL); Tcl_CreateObjCommand(interp, "tls::status", StatusObjCmd, (ClientData) 0, (Tcl_CmdDeleteProc *) NULL); Tcl_CreateObjCommand(interp, "tls::version", VersionObjCmd, (ClientData) 0, (Tcl_CmdDeleteProc *) NULL); Tcl_CreateObjCommand(interp, "tls::misc", MiscObjCmd, (ClientData) 0, (Tcl_CmdDeleteProc *) NULL); if (interp) { Tcl_Eval(interp, tlsTclInitScript); } return(Tcl_PkgProvide(interp, "tls", PACKAGE_VERSION)); } /* *------------------------------------------------------* * * Tls_SafeInit -- * * ------------------------------------------------* * Standard procedure required by 'load'. * Initializes this extension for a safe interpreter. * ------------------------------------------------* * * Sideeffects: * As of 'Tls_Init' * * Result: * A standard Tcl error code. * *------------------------------------------------------* */ int DLLEXPORT Tls_SafeInit(Tcl_Interp *interp) { dprintf("Called"); return(Tls_Init(interp)); } /* *------------------------------------------------------* * * TlsLibInit -- * * ------------------------------------------------* * Initializes SSL library once per application * ------------------------------------------------* * * Side effects: * initilizes SSL library * * Result: * none * *------------------------------------------------------* */ static int TlsLibInit(int uninitialize) { static int initialized = 0; int status = TCL_OK; #if defined(OPENSSL_THREADS) && defined(TCL_THREADS) size_t num_locks; #endif if (uninitialize) { if (!initialized) { dprintf("Asked to uninitialize, but we are not initialized"); return(TCL_OK); } dprintf("Asked to uninitialize"); #if defined(OPENSSL_THREADS) && defined(TCL_THREADS) Tcl_MutexLock(&init_mx); CRYPTO_set_locking_callback(NULL); CRYPTO_set_id_callback(NULL); if (locks) { free(locks); locks = NULL; locksCount = 0; } #endif initialized = 0; #if defined(OPENSSL_THREADS) && defined(TCL_THREADS) Tcl_MutexUnlock(&init_mx); #endif return(TCL_OK); } if (initialized) { dprintf("Called, but using cached value"); return(status); } dprintf("Called"); #if defined(OPENSSL_THREADS) && defined(TCL_THREADS) Tcl_MutexLock(&init_mx); #endif initialized = 1; #if defined(OPENSSL_THREADS) && defined(TCL_THREADS) num_locks = CRYPTO_num_locks(); locksCount = num_locks; locks = malloc(sizeof(*locks) * num_locks); memset(locks, 0, sizeof(*locks) * num_locks); 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(); BIO_new_tcl(NULL, 0); #if 0 /* * XXX:TODO: Remove this code and replace it with a check * for enough entropy and do not try to create our own * terrible entropy */ /* * 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); #endif done: #if defined(OPENSSL_THREADS) && defined(TCL_THREADS) Tcl_MutexUnlock(&init_mx); #endif return(status); }
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