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* Sets result to message digest or error message
*
*-------------------------------------------------------------------
*/
static int DigestMain(int type, Tcl_Interp *interp, int objc, Tcl_Obj *const objv[]) {
int idx, start = 1, format = HEX_FORMAT, res = TCL_OK;
Tcl_Obj *cmdObj = NULL, *dataObj = NULL, *fileObj = NULL, *keyObj = NULL;
const char *digestName = NULL, *cipherName = NULL, *channel = NULL, *opt;
const char *digestName = NULL, *cipherName = NULL, *macName = NULL, *channel = NULL, *opt;
const EVP_MD *md = NULL;
const EVP_CIPHER *cipher = NULL;
/* Clear interp result */
Tcl_ResetResult(interp);
/* Validate arg count */
if (objc < 3 || objc > 12) {
Tcl_WrongNumArgs(interp, 1, objv, "?-bin|-hex? ?-cipher name? ?-digest name? ?-key key? [-channel chan | -command cmdName | -file filename | ?-data? data]");
Tcl_WrongNumArgs(interp, 1, objv, "?-bin|-hex? ?-cipher name? ?-digest name? ?-key key? ?-mac name? [-channel chan | -command cmdName | -file filename | ?-data? data]");
return TCL_ERROR;
}
/* Optimal case for a digest and blob of data */
if (objc == 3 && type == TYPE_MD) {
digestName = Tcl_GetStringFromObj(objv[1],NULL);
if ((md = EVP_get_digestbyname(digestName)) != NULL) {
return DigestDataHandler(interp, objv[2], md, NULL, HEX_FORMAT | TYPE_MD, NULL);
} else {
Tcl_AppendResult(interp, "Invalid digest \"", digestName, "\"", NULL);
return TCL_ERROR;
}
} else {
/* Special case if first arg is digest, cipher, or mac */
opt = Tcl_GetStringFromObj(objv[start], NULL);
if (opt[0] != '-') {
if (type == TYPE_MD || type == TYPE_HMAC) {
digestName = opt;
start++;
} else if (type == TYPE_CMAC) {
cipherName = opt;
start++;
} else if (type == TYPE_MAC) {
macName = opt;
start++;
}
}
}
*opt = Tcl_GetStringFromObj(objv[idx], NULL);
opt = Tcl_GetStringFromObj(objv[idx], NULL);
if (opt[0] != '-') {
break;
}
OPTFLAG("-bin", format, BIN_FORMAT);
OPTFLAG("-binary", format, BIN_FORMAT);
OPTFLAG("-hex", format, HEX_FORMAT);
OPTFLAG("-hexadecimal", format, HEX_FORMAT);
OPTSTR("-chan", channel);
OPTSTR("-channel", channel);
OPTSTR("-cipher", cipherName);
OPTOBJ("-command", cmdObj);
OPTOBJ("-data", dataObj);
OPTSTR("-digest", digestName);
OPTOBJ("-file", fileObj);
OPTOBJ("-filename", fileObj);
OPTOBJ("-key", keyObj);
OPTSTR("-mac", macName);
OPTBAD("option", "-bin, -channel, -cipher, -command, -data, -digest, -file, -filename, -hex, or -key");
OPTBAD("option", "-bin, -channel, -cipher, -command, -data, -digest, -file, -filename, -hex, -key, or -mac");
return TCL_ERROR;
}
/* If only 1 arg left, it's the data */
if (idx < objc && dataObj == NULL) {
dataObj = objv[idx];
}
/* Get cipher */
if (cipherName != NULL) {
cipher = EVP_get_cipherbyname(cipherName);
type = TYPE_CMAC;
if (cipher == NULL) {
Tcl_AppendResult(interp, "Invalid cipher \"", cipherName, "\"", NULL);
return TCL_ERROR;
}
} else if (type == TYPE_CMAC) {
Tcl_AppendResult(interp, "No cipher specified", NULL);
return TCL_ERROR;
}
/* Get digest */
/* Get message digest */
if (digestName != NULL) {
md = EVP_get_digestbyname(digestName);
if (md == NULL) {
Tcl_AppendResult(interp, "Invalid digest \"", digestName, "\"", NULL);
return TCL_ERROR;
} else if (md == EVP_shake128() || md == EVP_shake256()) {
format |= IS_XOF;
}
} else if (type == TYPE_MD || type == TYPE_HMAC) {
Tcl_AppendResult(interp, "No digest specified", NULL);
return TCL_ERROR;
}
/* Get key */
if (keyObj != NULL) {
if (type == TYPE_MD) {
type = TYPE_HMAC;
}
} else if (type != TYPE_MD) {
Tcl_AppendResult(interp, "No key specified", NULL);
return TCL_ERROR;
}
/* Get MAC */
if (macName != NULL) {
if (strcmp(macName, "cmac") == 0) {
type = TYPE_CMAC;
} else if (strcmp(macName, "hmac") == 0) {
type = TYPE_HMAC;
} else {
Tcl_AppendResult(interp, "Invalid MAC \"", macName, "\"", NULL);
return TCL_ERROR;
}
} else if (type == TYPE_MAC) {
Tcl_AppendResult(interp, "No MAC specified", NULL);
return TCL_ERROR;
}
/* Calc digest on file, stacked channel, using instance command, or data blob */
if (fileObj != NULL) {
res = DigestFileHandler(interp, fileObj, md, cipher, format | type, keyObj);
} else if (channel != NULL) {
res = DigestChannelHandler(interp, channel, md, cipher, format | type, keyObj);
} else if (cmdObj != NULL) {
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static int CMACObjCmd(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *const objv[]) {
return DigestMain(TYPE_CMAC, interp, objc, objv);
}
static int HMACObjCmd(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *const objv[]) {
return DigestMain(TYPE_HMAC, interp, objc, objv);
}
static int MACObjCmd(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *const objv[]) {
return DigestMain(TYPE_MAC, interp, objc, objv);
}
/*
*-------------------------------------------------------------------
*
* Message Digest Convenience Commands --
*
* Convenience commands for select message digests.
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*-------------------------------------------------------------------
*/
int Tls_DigestCommands(Tcl_Interp *interp) {
Tcl_CreateObjCommand(interp, "tls::digest", MdObjCmd, (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);
Tcl_CreateObjCommand(interp, "tls::md", MdObjCmd, (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);
Tcl_CreateObjCommand(interp, "tls::cmac", CMACObjCmd, (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);
Tcl_CreateObjCommand(interp, "tls::hmac", HMACObjCmd, (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);
Tcl_CreateObjCommand(interp, "tls::mac", MACObjCmd, (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);
Tcl_CreateObjCommand(interp, "tls::md4", MD4ObjCmd, (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);
Tcl_CreateObjCommand(interp, "tls::md5", MD5ObjCmd, (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);
Tcl_CreateObjCommand(interp, "tls::sha1", SHA1ObjCmd, (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);
Tcl_CreateObjCommand(interp, "tls::sha256", SHA256ObjCmd, (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);
Tcl_CreateObjCommand(interp, "tls::sha512", SHA512ObjCmd, (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);
Tcl_CreateObjCommand(interp, "tls::unstack", DigestUnstackObjCmd, (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);
return TCL_OK;
}
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