/* * 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> /* * 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 _ANSI_ARGS_ ((CONST SSL *ssl, int where, int ret)); static int CiphersObjCmd _ANSI_ARGS_ ((ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[])); static int HandshakeObjCmd _ANSI_ARGS_ ((ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[])); static int ImportObjCmd _ANSI_ARGS_ ((ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[])); static int StatusObjCmd _ANSI_ARGS_ ((ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[])); static int VersionObjCmd _ANSI_ARGS_ ((ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[])); static int MiscObjCmd _ANSI_ARGS_ ((ClientData clientData, 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, char *DHparams)); static int TlsLibInit _ANSI_ARGS_ (()) ; #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 OPENSSL_NO_DH /* code derived from output of 'openssl dhparam -C 2048' */ static unsigned char dh2048_p[]={ 0xEC,0xFD,0x6F,0x66,0xD8,0xBC,0xB4,0xCB,0xD7,0xE7,0xB4,0xAE, 0xEC,0xC0,0x06,0x25,0x40,0x9F,0x3F,0xC4,0xAC,0x34,0x19,0x36, 0x8A,0xAB,0xA9,0xF6,0x45,0x36,0x87,0x1F,0x10,0x35,0x3F,0x90, 0x00,0xC6,0x7A,0xE8,0x51,0xF4,0x7F,0x50,0x0F,0xC2,0x82,0x91, 0xAD,0x60,0x1B,0x49,0xB1,0x0B,0x23,0xC3,0x37,0xAE,0x0D,0x2C, 0x49,0xC6,0xFB,0x60,0x9D,0x50,0x2F,0x8C,0x2F,0xDE,0xE6,0x5F, 0x53,0x8B,0x5F,0xF9,0x70,0x16,0xEE,0x51,0xD1,0xAB,0x02,0x48, 0x61,0xF1,0xA0,0xD7,0xBD,0x04,0x24,0xF0,0xE4,0xD1,0x0A,0x4C, 0x28,0xDC,0x22,0x78,0x7C,0xED,0x2A,0xFA,0xF4,0x57,0x7C,0xAE, 0xDF,0x52,0xC6,0xA2,0x11,0x28,0xC5,0x3B,0xB8,0x2F,0x95,0x3F, 0x1E,0x05,0x66,0xFE,0x7D,0x1A,0x73,0xA0,0x45,0xF8,0xBB,0x8C, 0x64,0xB9,0xA9,0x4D,0x23,0xBE,0x20,0x60,0xA2,0xF7,0xC7,0xD8, 0xD8,0x49,0x28,0x9A,0x81,0xAC,0xF9,0x7F,0x3C,0xFC,0xBE,0x25, 0x5B,0x1D,0xB6,0xAB,0x08,0x06,0x11,0x8D,0x94,0x69,0x3C,0x68, 0x98,0x5A,0x90,0xF8,0xEB,0x19,0xCA,0x9F,0x1C,0x50,0x96,0x53, 0xEF,0xEC,0x1B,0x93,0x4F,0x53,0xB7,0xD9,0x04,0x8E,0x48,0x99, 0x6E,0x24,0xFF,0x66,0xF5,0xB0,0xDF,0x00,0xBA,0x22,0xE2,0xB6, 0xE3,0x3A,0xC2,0x95,0xB1,0x14,0x68,0xFB,0xA5,0x37,0x22,0x78, 0x56,0x5C,0xA4,0x23,0x31,0x02,0x97,0x7D,0xA9,0x84,0x0B,0x12, 0x26,0x58,0x2F,0x86,0x10,0xAD,0xB0,0xAB,0xB9,0x7B,0x05,0x9A, 0xDE,0x11,0xF1,0xE7,0x34,0xC7,0x95,0x42,0x1C,0x4F,0xA9,0xA8, 0x92,0xDF,0x3F,0x7B, }; static unsigned char dh2048_g[]={ 0x02, }; static DH *get_dh2048() { DH *dh=NULL; if ((dh=DH_new()) == NULL) return(NULL); dh->p=BN_bin2bn(dh2048_p,sizeof(dh2048_p),NULL); dh->g=BN_bin2bn(dh2048_g,sizeof(dh2048_g),NULL); if ((dh->p == NULL) || (dh->g == NULL)) return(NULL); return(dh); } #endif /* * Defined in Tls_Init to determine what kind of channels we are using * (old-style 8.2.0-8.3.1 or new-style 8.3.2+). */ int channelTypeVersion; /* * 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[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) { if (mode & CRYPTO_LOCK) { Tcl_MutexLock(&locks[n]); } else { Tcl_MutexUnlock(&locks[n]); } } static unsigned long CryptoThreadIdCallback(void) { return (unsigned long) Tcl_GetCurrentThread(); } #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; 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; int length; SSL *ssl = (SSL*)X509_STORE_CTX_get_app_data(ctx); 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(stderr, "Verify: %d\n", 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 (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; if (msg && *msg) { Tcl_SetErrorCode(statePtr->interp, "SSL", msg, (char *)NULL); } else { msg = Tcl_GetStringFromObj(Tcl_GetObjResult(statePtr->interp), 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; } #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; 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; } } #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 CONST84 char *protocols[] = { "ssl2", "ssl3", "tls1", "tls1.1", "tls1.2", NULL }; enum protocol { 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; 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 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; } /* *------------------------------------------------------------------- * * 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, 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 */ int ret = 1; if (objc != 2) { Tcl_WrongNumArgs(interp, 1, objv, "channel"); return TCL_ERROR; } chan = Tcl_GetChannel(interp, Tcl_GetStringFromObj(objv[1], NULL), NULL); if (chan == (Tcl_Channel) NULL) { return TCL_ERROR; } if (channelTypeVersion == TLS_CHANNEL_VERSION_2) { /* * 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 (!SSL_is_init_finished(statePtr->ssl)) { int err; ret = Tls_WaitForConnect(statePtr, &err); if ((statePtr->flags & TLS_TCL_ASYNC) && err == EAGAIN) { ret = 0; } if (ret < 0) { CONST char *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); return TCL_ERROR; } } Tcl_SetObjResult(interp, Tcl_NewIntObj(ret)); return TCL_OK; } /* *------------------------------------------------------------------- * * 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; int idx, len; int flags = TLS_TCL_INIT; int server = 0; /* is connection incoming or outgoing? */ char *key = NULL; char *cert = NULL; 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 #if defined(NO_SSL2) int ssl2 = 0; #else int ssl2 = 1; #endif #if defined(NO_SSL3) int ssl3 = 0; #else int ssl3 = 1; #endif int tls1 = 1; int tls1_1 = 1; int tls1_2 = 1; int proto = 0; int verify = 0, require = 0, request = 1; if (objc < 2) { Tcl_WrongNumArgs(interp, 1, objv, "channel ?options?"); return TCL_ERROR; } chan = Tcl_GetChannel(interp, Tcl_GetStringFromObj(objv[1], NULL), NULL); if (chan == (Tcl_Channel) NULL) { return TCL_ERROR; } if (channelTypeVersion == TLS_CHANNEL_VERSION_2) { /* * Make sure to operate on the topmost channel */ chan = Tcl_GetTopChannel(chan); } for (idx = 2; idx < objc; idx++) { char *opt = Tcl_GetStringFromObj(objv[idx], NULL); if (opt[0] != '-') break; OPTSTR( "-cadir", CAdir); OPTSTR( "-cafile", CAfile); OPTSTR( "-certfile", cert); OPTSTR( "-cipher", ciphers); OPTOBJ( "-command", script); OPTSTR( "-dhparams", DHparams); 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, -dhparams, -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; 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; } if (channelTypeVersion == TLS_CHANNEL_VERSION_2) { /* * 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, proto, key, cert, 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_SetChannelOption(interp, chan, "-translation", "binary"); if (channelTypeVersion == TLS_CHANNEL_VERSION_1) { Tcl_SetChannelOption(interp, chan, "-buffering", "none"); } if (channelTypeVersion == TLS_CHANNEL_VERSION_2) { statePtr->self = Tcl_StackChannel(interp, Tls_ChannelType(), (ClientData) statePtr, (TCL_READABLE | TCL_WRITABLE), chan); } else { statePtr->self = chan; Tcl_StackChannel(interp, Tls_ChannelType(), (ClientData) statePtr, (TCL_READABLE | TCL_WRITABLE), chan); } if (statePtr->self == (Tcl_Channel) NULL) { /* * No use of Tcl_EventuallyFree because no possible Tcl_Preserve. */ Tls_Free((char *) statePtr); return TCL_ERROR; } /* * 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_CLOSE); 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 */ Tcl_SetResult(interp, (char *) Tcl_GetChannelName(statePtr->self), TCL_VOLATILE); return TCL_OK; } /* *------------------------------------------------------------------- * * 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. */ 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; } if (channelTypeVersion == TLS_CHANNEL_VERSION_2) { /* * 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; } /* *------------------------------------------------------------------- * * 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, proto, key, cert, CAdir, CAfile, ciphers, DHparams) State *statePtr; int proto; char *key; char *cert; 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; const SSL_METHOD *method; 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 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); /* 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_dh2048(); } SSL_CTX_set_tmp_dh(ctx, dh); DH_free(dh); } #endif /* set our certificate */ if (cert != NULL) { Tcl_DStringInit(&ds); if (SSL_CTX_use_certificate_file(ctx, F2N( cert, &ds), SSL_FILETYPE_PEM) <= 0) { Tcl_DStringFree(&ds); Tcl_AppendResult(interp, "unable to set certificate file ", cert, ": ", REASON(), (char *) NULL); SSL_CTX_free(ctx); return (SSL_CTX *)0; } /* get the private key associated with this certificate */ if (key == NULL) key=cert; if (SSL_CTX_use_PrivateKey_file(ctx, F2N( key, &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 ", key, " ", REASON(), (char *) NULL); SSL_CTX_free(ctx); return (SSL_CTX *)0; } Tcl_DStringFree(&ds); /* 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; } } else { cert = (char*)X509_get_default_cert_file(); if (SSL_CTX_use_certificate_file(ctx, cert, SSL_FILETYPE_PEM) <= 0) { #if 0 Tcl_DStringFree(&ds); Tcl_AppendResult(interp, "unable to use default certificate file ", cert, ": ", REASON(), (char *) NULL); SSL_CTX_free(ctx); return (SSL_CTX *)0; #endif } } 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/ */ 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; switch (objc) { case 2: channelName = Tcl_GetStringFromObj(objv[1], NULL); break; case 3: if (!strcmp (Tcl_GetString (objv[1]), "-local")) { channelName = Tcl_GetStringFromObj(objv[2], 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; } if (channelTypeVersion == TLS_CHANNEL_VERSION_2) { /* * 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_SetObjResult( interp, objPtr); return TCL_OK; } /* *------------------------------------------------------------------- * * 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; objPtr = Tcl_NewStringObj(OPENSSL_VERSION_TEXT, -1); Tcl_SetObjResult(interp, objPtr); return TCL_OK; } /* *------------------------------------------------------------------- * * 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 CONST84 char *commands [] = { "req", NULL }; enum command { C_REQ, C_DUMMY }; int cmd; 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, k_C, -1, -1, 0); X509_NAME_add_entry_by_txt(name,"ST", MBSTRING_ASC, k_ST, -1, -1, 0); X509_NAME_add_entry_by_txt(name,"L", MBSTRING_ASC, k_L, -1, -1, 0); X509_NAME_add_entry_by_txt(name,"O", MBSTRING_ASC, k_O, -1, -1, 0); X509_NAME_add_entry_by_txt(name,"OU", MBSTRING_ASC, k_OU, -1, -1, 0); X509_NAME_add_entry_by_txt(name,"CN", MBSTRING_ASC, k_CN, -1, -1, 0); X509_NAME_add_entry_by_txt(name,"Email", MBSTRING_ASC, 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; } /* *------------------------------------------------------------------- * * 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; 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) { /* * 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(stderr, "BIO_free_all(%p)\n", statePtr->bio); BIO_free_all(statePtr->bio); statePtr->bio = NULL; } if (statePtr->ssl) { dprintf(stderr, "SSL_free(%p)\n", 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; } } /* *------------------------------------------------------------------- * * 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 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). */ if ( #ifdef USE_TCL_STUBS Tcl_InitStubs(interp, "8.2", 0) #else Tcl_PkgRequire(interp, "Tcl", "8.2", 0) #endif == NULL) { return TCL_ERROR; } /* * Get the version so we can runtime switch on available functionality. * TLS should really only be used in 8.3.2+, but the other works for * some limited functionality, so an attempt at support is made. */ Tcl_GetVersion(&major, &minor, &patchlevel, &release); if ((major > 8) || ((major == 8) && ((minor > 3) || ((minor == 3) && (release == TCL_FINAL_RELEASE) && (patchlevel >= 2))))) { /* 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); 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); return Tcl_PkgProvide(interp, PACKAGE_NAME, 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 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 */ int status=TCL_OK; #if defined(OPENSSL_THREADS) && defined(TCL_THREADS) size_t num_locks; if (initialized) { return status; } Tcl_MutexLock(&init_mx); if (!initialized) { initialized = 1; #else { #endif 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: #if defined(OPENSSL_THREADS) && defined(TCL_THREADS) Tcl_MutexUnlock(&init_mx); #endif return status; }
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