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/* -*- mode:C; c-file-style: "bsd" -*- */
/*
* Copyright (c) 2008-2014 Yubico AB
* Copyright (c) 2010 Tollef Fog Heen <tfheen@err.no>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdlib.h>
#include <stdio.h>
#include <stddef.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <ykpers.h>
#include <yubikey.h> /* To get yubikey_modhex_encode and yubikey_hex_encode */
#include <ykdef.h>
#include "ykpers-args.h"
#define YUBICO_OATH_VENDOR_ID_HEX 0xe1 /* UB as hex */
#define YUBICO_HOTP_EVENT_TOKEN_TYPE 0x63 /* HE as hex */
const char *usage =
"Usage: ykpersonalize [options]\n"
"-Nkey use nth key found\n"
"-u update configuration without overwriting. This is only available\n"
" in YubiKey 2.3 and later. EXTFLAG_ALLOW_UPDATE will be set by\n"
" default\n"
"-1 change the first configuration. This is the default and\n"
" is normally used for true OTP generation.\n"
" In this configuration, TKTFLAG_APPEND_CR is set by default.\n"
"-2 change the second configuration. This is for Yubikey II only\n"
" and is then normally used for static key generation.\n"
" In this configuration, TKTFLAG_APPEND_CR, CFGFLAG_STATIC_TICKET,\n"
" CFGFLAG_STRONG_PW1, CFGFLAG_STRONG_PW2 and CFGFLAG_MAN_UPDATE\n"
" are set by default.\n"
"-x swap the configuration in slot 1 and 2. This is for YubiKey 2.3\n"
" and newer only\n"
"-z delete the configuration in slot 1 or 2.\n"
"-sFILE save configuration to FILE instead of key.\n"
" (if FILE is -, send to stdout)\n"
"-iFILE read configuration from FILE. (only valid for -fycfg)\n"
" (if FILE is -, read from stdin)\n"
"-fformat set the data format for -s and -i valid values are ycfg or legacy.\n"
"-a[XXX..] The AES secret key as a 32 (or 40 for OATH-HOTP/HMAC CHAL-RESP)\n"
" char hex value (not modhex) (none to prompt for key on stdin)\n"
" If -a is not used a random key will be generated.\n"
"-c[XXX..] A 12 char hex value (not modhex) to use as access code for programming\n"
" (this does NOT SET the access code, that's done with -oaccess=)\n"
" If -c is provided without argument a code is prompted for\n"
"-nXXX.. Write NDEF URI to YubiKey NEO, must be used with -1 or -2\n"
"-tXXX.. Write NDEF text to YubiKey NEO, must be used with -1 or -2\n"
"-mMODE Set the USB device configuration of the YubiKey.\n"
" See the manpage for details. This is for YubiKey 3 and 4 only.\n"
"-S0605.. Set the scanmap to use with the YubiKey. Must be 45 unique bytes,\n"
" in hex. Use with no argument to reset to the default. This is for\n"
" YubiKey 3.0 and newer only.\n"
"-D0403.. Set the deviceinfo to use with this YubiKey. YubiKey 5 and newer only.\n"
"-oOPTION change configuration option. Possible OPTION arguments are:\n"
" fixed=xxxxxxxxxxx The public identity of key, in MODHEX.\n"
" This is 0-32 characters long.\n"
" uid[=xxxxxx] The uid part of the generated ticket, in HEX.\n"
" MUST be 12 characters long.\n"
" If argument is omitted uid is prompted for on stdin.\n"
" access[=xxxxxx] New access code to set, in HEX.\n"
" MUST be 12 characters long.\n"
" If argument is omitted code is prompted for on stdin.\n"
" oath-imf=IMF OATH Initial Moving Factor to use.\n"
" oath-id[=h:OOTT...] OATH Token Identifier (none for serial-based)\n"
"\n"
" Ticket flags for all firmware versions:\n"
" [-]tab-first set/clear TAB_FIRST\n"
" [-]append-tab1 set/clear APPEND_TAB1\n"
" [-]append-tab2 set/clear APPEND_TAB2\n"
" [-]append-delay1 set/clear APPEND_DELAY1\n"
" [-]append-delay2 set/clear APPEND_DELAY2\n"
" [-]append-cr set/clear APPEND_CR\n"
"\n"
" Ticket flags for firmware version 2.0 and above:\n"
" [-]protect-cfg2 set/clear PROTECT_CFG2\n"
"\n"
" Ticket flags for firmware version 2.1 and above:\n"
" [-]oath-hotp set/clear OATH_HOTP\n"
"\n"
" Ticket flags for firmware version 2.2 and above:\n"
" [-]chal-resp set/clear CHAL_RESP\n"
"\n"
" Configuration flags for all firmware versions:\n"
" [-]send-ref set/clear SEND_REF\n"
" [-]pacing-10ms set/clear PACING_10MS\n"
" [-]pacing-20ms set/clear PACING_20MS\n"
" [-]static-ticket set/clear STATIC_TICKET\n"
"\n"
" Configuration flags for firmware version 1.x only:\n"
" [-]ticket-first set/clear TICKET_FIRST\n"
" [-]allow-hidtrig set/clear ALLOW_HIDTRIG\n"
"\n"
" Configuration flags for firmware version 2.0 and above:\n"
" [-]short-ticket set/clear SHORT_TICKET\n"
" [-]strong-pw1 set/clear STRONG_PW1\n"
" [-]strong-pw2 set/clear STRONG_PW2\n"
" [-]man-update set/clear MAN_UPDATE\n"
"\n"
" Configuration flags for firmware version 2.1 and above:\n"
" [-]oath-hotp8 set/clear OATH_HOTP8\n"
" [-]oath-fixed-modhex1 set/clear OATH_FIXED_MODHEX1\n"
" [-]oath-fixed-modhex2 set/clear OATH_FIXED_MODHEX2\n"
" [-]oath-fixed-modhex set/clear OATH_MODHEX\n"
"\n"
" Configuration flags for firmware version 2.2 and above:\n"
" [-]chal-yubico set/clear CHAL_YUBICO\n"
" [-]chal-hmac set/clear CHAL_HMAC\n"
" [-]hmac-lt64 set/clear HMAC_LT64\n"
" [-]chal-btn-trig set/clear CHAL_BTN_TRIG\n"
"\n"
" Extended flags for firmware version 2.2 and above:\n"
" [-]serial-btn-visible set/clear SERIAL_BTN_VISIBLE\n"
" [-]serial-usb-visible set/clear SERIAL_USB_VISIBLE\n"
" [-]serial-api-visible set/clear SERIAL_API_VISIBLE\n"
"\n"
" Extended flags for firmware version 2.3 and above:\n"
" [-]use-numeric-keypad set/clear USE_NUMERIC_KEYPAD\n"
" [-]fast-trig set/clear FAST_TRIG\n"
" [-]allow-update set/clear ALLOW_UPDATE\n"
" [-]dormant set/clear DORMANT\n"
"\n"
" Extended flags for firmware version 2.4/3.1 and above:\n"
" [-]led-inv set/clear LED_INV\n"
"\n"
"-y always commit (do not prompt)\n"
"\n"
"-d dry-run (don't write anything to key)\n"
"\n"
"-v verbose\n"
"-V tool version\n"
"-h help (this text)\n"
;
const char *optstring = ":u12xza:c:n:t:hi:o:s:f:dvym:S:VN:D:";
static int _set_fixed(char *opt, YKP_CONFIG *cfg);
static int _format_decimal_as_hex(uint8_t *dst, size_t dst_len, uint8_t *src);
static int _format_oath_id(uint8_t *dst, size_t dst_len, uint8_t vendor, uint8_t type, uint32_t mui);
int hex_modhex_decode(unsigned char *result, size_t *resultlen,
const char *str, size_t strl,
size_t minsize, size_t maxsize,
bool primarily_modhex)
{
if (strl >= 2) {
if (strncmp(str, "m:", 2) == 0
|| strncmp(str, "M:", 2) == 0) {
str += 2;
strl -= 2;
primarily_modhex = true;
} else if (strncmp(str, "h:", 2) == 0
|| strncmp(str, "H:", 2) == 0) {
str += 2;
strl -= 2;
primarily_modhex = false;
}
}
if ((strl % 2 != 0) || (strl < minsize) || (strl > maxsize)) {
return -1;
}
*resultlen = strl / 2;
if (primarily_modhex) {
if (yubikey_modhex_p(str)) {
yubikey_modhex_decode((char *)result, str, strl);
return 1;
}
} else {
if (yubikey_hex_p(str)) {
yubikey_hex_decode((char *)result, str, strl);
return 1;
}
}
return 0;
}
void report_yk_error(void)
{
if (ykp_errno)
fprintf(stderr, "Yubikey personalization error: %s\n",
ykp_strerror(ykp_errno));
if (yk_errno) {
if (yk_errno == YK_EUSBERR) {
fprintf(stderr, "USB error: %s\n",
yk_usb_strerror());
} else {
fprintf(stderr, "Yubikey core error: %s\n",
yk_strerror(yk_errno));
}
}
}
static int prompt_for_data(const char *prompt, char **data) {
size_t datalen;
fprintf(stderr, "%s", prompt);
fflush(stderr);
*data = calloc(257, sizeof(char));
if(!fgets(*data, 256, stdin)) {
fprintf(stderr, "Error reading from stdin\n");
perror ("fgets");
return 1;
}
datalen = strlen(*data);
if(datalen > 0 && (*data)[datalen - 1] == '\n') {
(*data)[datalen - 1] = '\0';
}
return 0;
}
extern char *optarg;
extern int optind;
/*
* Parse all arguments supplied to this program and turn it into mainly
* a YKP_CONFIG (but return some other parameters as well, like
* access_code, verbose etc.).
*
* Done in this way to be testable (see tests/test_args_to_config.c).
*/
int args_to_config(int argc, char **argv, YKP_CONFIG *cfg, char *oathid,
size_t oathid_len, const char **infname,
const char **outfname, int *data_format, bool *autocommit,
YK_STATUS *st, bool *verbose, bool *dry_run,
char **access_code, char **new_access_code,
char *ndef_type, char *ndef, size_t ndef_len,
unsigned char *usb_mode, bool *zap,
unsigned char *scan_bin, unsigned char *cr_timeout,
unsigned short *autoeject_timeout, int *num_modes_seen,
unsigned char *device_info, size_t *device_info_len,
int *exit_code)
{
int c;
char keylocation = 0;
const char *aeshash = NULL;
bool slot_chosen = false;
bool mode_chosen = false;
bool option_seen = false;
bool swap_seen = false;
bool update_seen = false;
bool ndef_seen = false;
bool usb_mode_seen = false;
bool scan_map_seen = false;
bool device_info_seen = false;
ykp_configure_version(cfg, st);
while((c = getopt(argc, argv, optstring)) != -1) {
if (c == 'o') {
if (strcmp(optarg, "oath-hotp") == 0 ||
strcmp(optarg, "chal-resp") == 0) {
if (mode_chosen) {
fprintf(stderr, "You may only choose mode (-ooath-hotp / "
"-ochal-resp) once.\n");
*exit_code = 1;
return 0;
}
if (option_seen) {
fprintf(stderr, "Mode choosing flags (oath-hotp / chal-resp) "
"must be set prior to any other options (-o).\n");
*exit_code = 1;
return 0;
}
/* The default flags (particularly for slot 2) does not apply to
* these new modes of operation found in Yubikey >= 2.1. Therefor,
* we reset them here and, as a consequence of that, require the
* mode choosing options to be specified before any other.
*/
ykp_clear_config(cfg);
mode_chosen = 1;
}
option_seen = true;
}
switch (c) {
case 'u':
if (slot_chosen) {
fprintf(stderr, "You must use update before slot (-1 / -2).\n");
*exit_code = 1;
return 0;
}
if (swap_seen) {
fprintf(stderr, "Update (-u) and swap (-x) can't be combined.\n");
*exit_code = 1;
return 0;
}
if (ndef_seen) {
fprintf(stderr, "Update (-u) can not be combined with ndef (-n).\n");
*exit_code = 1;
return 0;
}
update_seen = true;
break;
case '1':
case '2': {
int command;
if (slot_chosen) {
fprintf(stderr, "You may only choose slot (-1 / -2) once.\n");
*exit_code = 1;
return 0;
}
if (option_seen) {
fprintf(stderr, "You must choose slot before any options (-o).\n");
*exit_code = 1;
return 0;
}
if (swap_seen) {
fprintf(stderr, "You can not combine slot swap (-x) with configuring a slot.\n");
*exit_code = 1;
return 0;
}
ykp_set_tktflag_APPEND_CR(cfg, true);
if (update_seen) {
ykp_set_extflag_ALLOW_UPDATE(cfg, true);
if(c == '1') {
command = SLOT_UPDATE1;
} else if(c == '2') {
command = SLOT_UPDATE2;
}
} else if (c == '1') {
command = SLOT_CONFIG;
} else if (c == '2') {
command = SLOT_CONFIG2;
ykp_set_cfgflag_STATIC_TICKET(cfg, true);
ykp_set_cfgflag_STRONG_PW1(cfg, true);
ykp_set_cfgflag_STRONG_PW2(cfg, true);
ykp_set_cfgflag_MAN_UPDATE(cfg, true);
}
if (!ykp_configure_command(cfg, command))
return 0;
slot_chosen = true;
break;
}
case 'x':
if (slot_chosen || option_seen || update_seen || ndef_seen || *zap || usb_mode_seen || scan_map_seen || device_info_seen) {
fprintf(stderr, "Slot swap (-x) can not be used with other options.\n");
*exit_code = 1;
return 0;
}
if (!ykp_configure_command(cfg, SLOT_SWAP)) {
return 0;
}
swap_seen = true;
break;
case 'z':
if (swap_seen || update_seen || ndef_seen || usb_mode_seen || scan_map_seen || device_info_seen) {
fprintf(stderr, "Zap (-z) can only be used with a slot (-1 / -2).\n");
*exit_code = 1;
return 0;
}
*zap = true;
break;
case 'i':
*infname = optarg;
break;
case 's':
*outfname = optarg;
break;
case 'f':
if(strcmp(optarg, "ycfg") == 0) {
*data_format = YKP_FORMAT_YCFG;
} else if(strcmp(optarg, "legacy") == 0) {
*data_format = YKP_FORMAT_LEGACY;
} else {
fprintf(stderr, "The only valid formats to -f is ycfg and legacy.\n");
*exit_code = 1;
return 0;
}
break;
case 'a':
if(optarg[0] == '-') {
keylocation = 2;
optind--;
} else {
aeshash = optarg;
keylocation = 1;
}
break;
case 'c':
if(optarg[0] == '-') {
optind--;
if(prompt_for_data(" Access code, 6 bytes (12 characters hex) : ", access_code) != 0) {
*exit_code = 1;
return 0;
}
} else {
*access_code = strdup(optarg);
}
break;
case 't':
*ndef_type = 'T';
case 'n': {
int command;
if(!*ndef_type) {
*ndef_type = 'U';
}
if (swap_seen || update_seen || option_seen || *zap || usb_mode_seen || scan_map_seen || device_info_seen) {
fprintf(stderr, "Ndef (-n/-t) can only be used with a slot (-1/-2).\n");
*exit_code = 1;
return 0;
}
if(ykp_command(cfg) == SLOT_CONFIG) {
command = SLOT_NDEF;
} else if(ykp_command(cfg) == SLOT_CONFIG2) {
command = SLOT_NDEF2;
} else {
command = SLOT_NDEF;
}
if (!ykp_configure_command(cfg, command)) {
return 0;
}
strncpy(ndef, optarg, ndef_len);
if (ndef_len > 0) {
ndef[ndef_len - 1] = '\0';
}
ndef_seen = true;
break;
}
case 'm':
if(slot_chosen || swap_seen || update_seen || option_seen || ndef_seen || *zap || scan_map_seen || device_info_seen) {
fprintf(stderr, "USB mode (-m) can not be combined with other options.\n");
*exit_code = 1;
return 0;
}
unsigned char mode, crtime;
unsigned short autotime;
int matched = sscanf(optarg, "%hhx:%hhd:%hd", &mode, &crtime, &autotime);
if(matched > 0) {
*usb_mode = mode;
if(matched > 1) {
*cr_timeout = crtime;
if(matched > 2) {
*autoeject_timeout = autotime;
}
}
usb_mode_seen = true;
*num_modes_seen = matched;
} else {
fprintf(stderr, "Invalid USB operation mode.\n");
*exit_code = 1;
return 0;
}
if (!ykp_configure_command(cfg, SLOT_DEVICE_CONFIG))
return 0;
break;
case 'S':
{
size_t scanlength = strlen(SCAN_MAP);
if(slot_chosen || swap_seen || update_seen || option_seen || ndef_seen || *zap || usb_mode_seen || device_info_seen) {
fprintf(stderr, "Scanmap (-S) can not be combined with other options.\n");
*exit_code = 1;
return 0;
}
{
size_t scanbinlen;
size_t scanlen = strlen (optarg);
int rc = hex_modhex_decode(scan_bin, &scanbinlen,
optarg, scanlen,
scanlength * 2, scanlength * 2,
false);
if (rc <= 0) {
fprintf(stderr,
"Invalid scanmap string %s\n",
optarg);
*exit_code = 1;
return 0;
}
}
scan_map_seen = true;
}
if (!ykp_configure_command(cfg, SLOT_SCAN_MAP))
return 0;
break;
case 'D':
if(slot_chosen || swap_seen || update_seen || option_seen || ndef_seen || *zap || usb_mode_seen || scan_map_seen) {
fprintf(stderr, "Deviceinfo (-D) can not be combined with other options.\n");
*exit_code = 1;
return 0;
}
{
size_t len = strlen(optarg);
int rc = hex_modhex_decode(device_info, device_info_len, optarg, strlen(optarg), 2, 128, false);
if (rc <= 0) {
fprintf(stderr, "Failed decoding deviceinfo string: '%s'\n", optarg);
*exit_code = 1;
return 0;
}
if (!ykp_configure_command(cfg, SLOT_YK4_SET_DEVICE_INFO)) {
return 0;
}
device_info_seen = true;
}
break;
case 'o':
if (*zap) {
fprintf(stderr, "No options can be given with zap (-z).\n");
*exit_code = 1;
return 0;
}
if (strncmp(optarg, "fixed=", 6) == 0) {
if (_set_fixed(optarg + 6, cfg) != 1) {
fprintf(stderr,
"Invalid fixed string: %s\n",
optarg + 6);
*exit_code = 1;
return 0;
}
}
else if (strncmp(optarg, "uid", 3) == 0) {
char *uid = optarg+4;
size_t uidlen;
unsigned char uidbin[256];
size_t uidbinlen = 0;
int rc;
char *uidtmp = NULL;
if(strncmp(optarg, "uid=", 4) != 0) {
if(prompt_for_data(" Private ID, 6 bytes (12 characters hex) : ", &uidtmp) != 0) {
*exit_code = 1;
return 0;
}
uid = uidtmp;
}
uidlen = strlen(uid);
rc = hex_modhex_decode(uidbin, &uidbinlen,
uid, uidlen,
12, 12, false);
if (rc <= 0) {
fprintf(stderr,
"Invalid uid string: %s\n",
uid);
*exit_code = 1;
return 0;
}
free(uidtmp);
/* for OATH-HOTP and CHAL-RESP, uid is not applicable */
if (ykp_get_tktflag_OATH_HOTP(cfg) || ykp_get_tktflag_CHAL_RESP(cfg)) {
fprintf(stderr,
"Option uid= not valid with -ooath-hotp or -ochal-resp.\n"
);
*exit_code = 1;
return 0;
}
ykp_set_uid(cfg, uidbin, uidbinlen);
}
else if (strncmp(optarg, "access=", 7) == 0) {
*new_access_code = strdup(optarg + 7);
}
else if (strncmp(optarg, "access", 6) == 0) {
if(prompt_for_data(" New access code, 6 bytes (12 characters hex) : ", new_access_code) != 0) {
*exit_code = 1;
return 0;
}
}
#define TKTFLAG(o, f) \
else if (strcmp(optarg, o) == 0) { \
if (!ykp_set_tktflag_##f(cfg, true)) { \
*exit_code = 1; \
return 0; \
} \
} else if (strcmp(optarg, "-" o) == 0) { \
if (! ykp_set_tktflag_##f(cfg, false)) { \
*exit_code = 1; \
return 0; \
} \
}
TKTFLAG("tab-first", TAB_FIRST)
TKTFLAG("append-tab1", APPEND_TAB1)
TKTFLAG("append-tab2", APPEND_TAB2)
TKTFLAG("append-delay1", APPEND_DELAY1)
TKTFLAG("append-delay2", APPEND_DELAY2)
TKTFLAG("append-cr", APPEND_CR)
TKTFLAG("protect-cfg2", PROTECT_CFG2)
TKTFLAG("oath-hotp", OATH_HOTP)
TKTFLAG("chal-resp", CHAL_RESP)
#undef TKTFLAG
#define CFGFLAG(o, f) \
else if (strcmp(optarg, o) == 0) { \
if (! ykp_set_cfgflag_##f(cfg, true)) { \
*exit_code = 1; \
return 0; \
} \
} else if (strcmp(optarg, "-" o) == 0) { \
if (! ykp_set_cfgflag_##f(cfg, false)) { \
*exit_code = 1; \
return 0; \
} \
}
CFGFLAG("send-ref", SEND_REF)
CFGFLAG("ticket-first", TICKET_FIRST)
CFGFLAG("pacing-10ms", PACING_10MS)
CFGFLAG("pacing-20ms", PACING_20MS)
CFGFLAG("allow-hidtrig", ALLOW_HIDTRIG)
CFGFLAG("static-ticket", STATIC_TICKET)
CFGFLAG("short-ticket", SHORT_TICKET)
CFGFLAG("strong-pw1", STRONG_PW1)
CFGFLAG("strong-pw2", STRONG_PW2)
CFGFLAG("man-update", MAN_UPDATE)
CFGFLAG("oath-hotp8", OATH_HOTP8)
CFGFLAG("oath-fixed-modhex1", OATH_FIXED_MODHEX1)
CFGFLAG("oath-fixed-modhex2", OATH_FIXED_MODHEX2)
CFGFLAG("oath-fixed-modhex", OATH_FIXED_MODHEX)
CFGFLAG("chal-yubico", CHAL_YUBICO)
CFGFLAG("chal-hmac", CHAL_HMAC)
CFGFLAG("hmac-lt64", HMAC_LT64)
CFGFLAG("chal-btn-trig", CHAL_BTN_TRIG)
#undef CFGFLAG
else if (strncmp(optarg, "oath-imf=", 9) == 0) {
unsigned long imf;
if (!ykp_get_tktflag_OATH_HOTP(cfg)) {
fprintf(stderr,
"Option oath-imf= only valid with -ooath-hotp or -ooath-hotp8.\n"
);
*exit_code = 1;
return 0;
}
if (sscanf(optarg+9, "%lu", &imf) != 1 ||
/* yubikey limitations */
imf > 65535*16 || imf % 16 != 0) {
fprintf(stderr,
"Invalid value %s for oath-imf=.\n", optarg+9
);
*exit_code = 1;
return 0;
}
if (! ykp_set_oath_imf(cfg, imf)) {
*exit_code = 1;
return 0;
}
}
else if (strncmp(optarg, "oath-id=", 8) == 0 || strcmp(optarg, "oath-id") == 0) {
strncpy(oathid, optarg, oathid_len);
if (oathid_len > 0) {
oathid[oathid_len - 1] = '\0';
}
}
#define EXTFLAG(o, f) \
else if (strcmp(optarg, o) == 0) { \
if (! ykp_set_extflag_##f(cfg, true)) { \
*exit_code = 1; \
return 0; \
} \
} else if (strcmp(optarg, "-" o) == 0) { \
if (! ykp_set_extflag_##f(cfg, false)) { \
*exit_code = 1; \
return 0; \
} \
}
EXTFLAG("serial-btn-visible", SERIAL_BTN_VISIBLE)
EXTFLAG("serial-usb-visible", SERIAL_USB_VISIBLE)
EXTFLAG("serial-api-visible", SERIAL_API_VISIBLE)
EXTFLAG("use-numeric-keypad", USE_NUMERIC_KEYPAD)
EXTFLAG("fast-trig", FAST_TRIG)
EXTFLAG("allow-update", ALLOW_UPDATE)
EXTFLAG("dormant", DORMANT)
EXTFLAG("led-inv", LED_INV)
#undef EXTFLAG
else {
fprintf(stderr, "Unknown option '%s'\n",
optarg);
fputs(usage, stderr);
*exit_code = 1;
return 0;
}
break;
case 'd':
*dry_run = true;
break;
case 'v':
*verbose = true;
break;
case 'y':
*autocommit = true;
break;
case 'V':
case 'N':
continue;
case ':':
switch(optopt) {
case 'S':
{
size_t scanlength = strlen(SCAN_MAP);
if(slot_chosen || swap_seen || update_seen || option_seen || ndef_seen || *zap || usb_mode_seen) {
fprintf(stderr, "Scanmap (-S) can not be combined with other options.\n");
*exit_code = 1;
return 0;
}
memset(scan_bin, 0, scanlength);
scan_map_seen = true;
if (!ykp_configure_command(cfg, SLOT_SCAN_MAP))
return 0;
continue;
}
case 'a':
keylocation = 2;
continue;
case 'c':
if(prompt_for_data(" Access code, 6 bytes (12 characters hex) : ", access_code) != 0) {
*exit_code = 1;
return 0;
}
continue;
}
case 'h':
default:
fputs(usage, stderr);
*exit_code = 0;
return 0;
}
}
if (!slot_chosen && !ndef_seen && !swap_seen && !usb_mode_seen && !scan_map_seen && !device_info_seen) {
if (argc == 1) {
fputs(usage, stderr);
} else {
fprintf(stderr, "A slot must be chosen with -1 or -2.\n");
}
*exit_code = 1;
return 0;
}
if (update_seen) {
struct config_st *core_config = (struct config_st *) ykp_core_config(cfg);
if ((core_config->tktFlags & TKTFLAG_UPDATE_MASK) != core_config->tktFlags) {
fprintf(stderr, "Unallowed ticket flags with update.\n");
*exit_code = 1;
return 0;
}
if ((core_config->cfgFlags & CFGFLAG_UPDATE_MASK) != core_config->cfgFlags) {
fprintf(stderr, "Unallowed cfg flags with update.\n");
*exit_code = 1;
return 0;
}
if ((core_config->extFlags & EXTFLAG_UPDATE_MASK) != core_config->extFlags) {
fprintf(stderr, "Unallowed ext flags with update.\n");
*exit_code = 1;
return 0;
}
}
if (! *zap && (ykp_command(cfg) == SLOT_CONFIG || ykp_command(cfg) == SLOT_CONFIG2)) {
size_t key_bytes = (size_t)ykp_get_supported_key_length(cfg);
int res = 0;
char *key_tmp = NULL;
char keybuf[20];
if(keylocation == 2) {
const char *prompt = " AES key, 16 bytes (32 characters hex) : ";
if (key_bytes == 20) {
prompt = " HMAC key, 20 bytes (40 characters hex) : ";
}
if (prompt_for_data(prompt, &key_tmp) != 0) {
*exit_code = 1;
return 0;
}
aeshash = key_tmp;
keylocation = 1;
}
if(keylocation == 0) {
const char *random_places[] = {
"/dev/srandom",
"/dev/urandom",
"/dev/random",
0
};
const char **random_place;
size_t read_bytes = 0;
for (random_place = random_places; *random_place; random_place++) {
FILE *random_file = fopen(*random_place, "r");
if (random_file) {
read_bytes = 0;
while (read_bytes < key_bytes) {
size_t n = fread(&keybuf[read_bytes], 1,
key_bytes - read_bytes, random_file);
read_bytes += n;
}
fclose(random_file);
break;
}
}
if(read_bytes < key_bytes) {
ykp_errno = YKP_ENORANDOM;
*exit_code = 1;
return 0;
}
} else {
size_t key_len = 0;
int rc = hex_modhex_decode((unsigned char *)keybuf, &key_len, aeshash, strlen(aeshash), key_bytes * 2, key_bytes * 2, false);
free(key_tmp);
if(rc <= 0) {
fprintf(stderr, "Invalid key string\n");
*exit_code = 1;
return 0;
}
}
if (key_bytes == 20) {
res = ykp_HMAC_key_from_raw(cfg, keybuf);
} else {
res = ykp_AES_key_from_raw(cfg, keybuf);
}
if (res) {
fprintf(stderr, "Bad %s key: %s\n", key_bytes == 20 ? "HMAC":"AES", aeshash);
fflush(stderr);
*exit_code = 1;
return 0;
}
}
return 1;
}
static int _set_fixed(char *opt, YKP_CONFIG *cfg) {
const char *fixed = opt;
size_t fixedlen = strlen (fixed);
unsigned char fixedbin[256];
size_t fixedbinlen = 0;
int rc = hex_modhex_decode(fixedbin, &fixedbinlen,
fixed, fixedlen,
0, 32, true);
if (rc <= 0)
return 0;
ykp_set_fixed(cfg, fixedbin, fixedbinlen);
return 1;
}
/* re-format decimal 12345678 into 'hex' 0x12 0x34 0x56 0x78 */
static int _format_decimal_as_hex(uint8_t *dst, size_t dst_len, uint8_t *src)
{
uint8_t *end;
end = dst + dst_len;
while (src[0] && src[1]) {
if (dst >= end)
return 0;
*dst = ((src[0] - '0') * 0x10) + src[1] - '0';
dst++;
src += 2;
}
return 1;
}
/* For details, see YubiKey Manual 2010-09-16 section 5.3.4 - OATH-HOTP Token Identifier */
static int _format_oath_id(uint8_t *dst, size_t dst_len, uint8_t vendor, uint8_t type, uint32_t mui)
{
uint8_t buf[8 + 1];
if (mui > 99999999)
return 0;
/* two bytes vendor and token type, and eight bytes MUI */
if (dst_len < 2 + 8)
return 0;
/* Make the YubiKey output the MUI number in decimal */
snprintf(buf, sizeof(buf), "%08i", mui);
dst[0] = vendor;
dst[1] = type;
if (_format_decimal_as_hex(dst + 2, dst_len - 2, buf) != 1)
return 0;
return 1;
}
int set_oath_id(char *opt, YKP_CONFIG *cfg, YK_KEY *yk, YK_STATUS *st) {
/* For details, see YubiKey Manual 2010-09-16 section 5.3.4 - OATH-HOTP Token Identifier */
if (!ykp_get_tktflag_OATH_HOTP(cfg)) {
fprintf(stderr,
"Option oath-id= only valid with -ooath-hotp or -ooath-hotp8.\n"
);
return 0;
}
if (! ykp_set_cfgflag_OATH_FIXED_MODHEX2(cfg, true))
return 0;
if (! ykp_set_extflag_SERIAL_API_VISIBLE(cfg, true))
return 0;
if (strlen(opt) > 7) {
if (_set_fixed(opt + 8, cfg) != 1) {
fprintf(stderr,
"Invalid OATH token identifier %s supplied with oath-id=.\n", opt + 8
);
return 0;
}
} else {
/* No Token Id supplied, try to create one automatically based on
* the serial number of the YubiKey.
*/
unsigned int serial;
uint8_t oath_id[12] = {0};
if (ykds_version_major(st) > 2 ||
(ykds_version_major(st) == 2 &&
ykds_version_minor(st) >= 2)) {
if (! yk_get_serial(yk, 0, 0, &serial)) {
fprintf(stderr,
"YubiKey refuses reading serial number. "
"Can't use -ooath-id.\n"
);
return 0;
}
} else {
fprintf(stderr,
"YubiKey %d.%d.%d does not support reading serial number. "
"Can't use -ooath-id.\n",
ykds_version_major(st),
ykds_version_minor(st),
ykds_version_build(st)
);
return 0;
}
if (_format_oath_id(oath_id, sizeof(oath_id), YUBICO_OATH_VENDOR_ID_HEX,
YUBICO_HOTP_EVENT_TOKEN_TYPE, serial) != 1) {
fprintf(stderr, "Failed formatting OATH token identifier.\n");
return 0;
}
if (ykp_set_fixed(cfg, oath_id, 6) != 1) {
fprintf(stderr,
"Failed setting OATH token identifier.\n"
);
return 0;
}
}
return 1;
}
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