int
load_chalresp_state(FILE *f, CR_STATE *state, bool verbose)
{
/*
* Load the current challenge and expected response information from a file handle.
*
* Format is hex(challenge):hex(response):slot num
*/
char challenge_hex[CR_CHALLENGE_SIZE * 2 + 1], response_hex[CR_RESPONSE_SIZE * 2 + 1];
int slot;
int r;
if (! f)
goto out;
/* XXX not ideal with hard coded lengths in this scan string.
* 126 corresponds to twice the size of CR_CHALLENGE_SIZE,
* 40 is twice the size of CR_RESPONSE_SIZE
* (twice because we hex encode the challenge and response)
*/
r = fscanf(f, "v1:%126[0-9a-z]:%40[0-9a-z]:%d", &challenge_hex[0], &response_hex[0], &slot);
if (r != 3) {
D(("Could not parse contents of chalresp_state file (%i)", r));
goto out;
}
if (verbose)
D(("Challenge: %s, expected response: %s, slot: %d", challenge_hex, response_hex, slot));
if (! yubikey_hex_p(challenge_hex)) {
D(("Invalid challenge hex input : %s", challenge_hex));
goto out;
}
if (! yubikey_hex_p(response_hex)) {
D(("Invalid expected response hex input : %s", response_hex));
goto out;
}
if (slot != 1 && slot != 2) {
D(("Invalid slot input : %i", slot));
goto out;
}
yubikey_hex_decode(state->challenge, challenge_hex, sizeof(state->challenge));
state->challenge_len = strlen(challenge_hex) / 2;
yubikey_hex_decode(state->response, response_hex, sizeof(state->response));
state->response_len = strlen(response_hex) / 2;
state->slot = slot;
return 1;
out:
return 0;
}
/**
* The Modhex encoding is described in Yubikey manual, as a start point You
* can read this: @link https://www.yubico.com/modhex-calculator/ .
* @param p2Modhex what to encode.
* @return input Modhex encoded.
*
*/
const string YubikoOtpKeyConfig::hex2Modhex(const string& p2Modhex) {
const unsigned long mySz = p2Modhex.size();
const unsigned long mySz2 = mySz / 2;
vector<uint8_t> myBytes(mySz2, uint8_t(0));
yubikey_hex_decode(reinterpret_cast<char*>(&myBytes[0]), p2Modhex.c_str(),
mySz);
string myPubId(mySz + 1, '\0');
yubikey_modhex_encode(&myPubId[0], reinterpret_cast<char*>(&myBytes[0]),
mySz2);
myPubId.resize(mySz);
return myPubId;
}
int get_entry_from_id(int id, entry_st *entry, sqlite3 *db)
{
char *request;
char *uid, *aes;
int rc;
sqlite3_stmt *ppStmt;
request = sqlite3_mprintf("SELECT uid, aes, counter, session FROM tokens WHERE id=%d;", id);
rc = sqlite3_prepare_v2(db, request, -1,
&ppStmt, NULL);
sqlite3_free(request);
if(check_error("Error in preparing SELECT", rc, db))
return CHK_FAIL;
rc = sqlite3_step(ppStmt);
if(check_error("Error in SELECT", rc, db))
return CHK_FAIL;
if (rc == SQLITE_ROW)
{
uid = (char *) sqlite3_column_text(ppStmt, 0);
//printf("uid: %s\n", uid);
aes = (char *) sqlite3_column_text(ppStmt, 1);
//printf("aes: %s\n", aes);
if ((strlen(uid) != 2*YUBIKEY_UID_SIZE) &&
(strlen(aes) != 2*YUBIKEY_KEY_SIZE))
{
sqlite3_finalize(ppStmt);
printf("Error in database: wrong uid/aes size\n");
return CHK_FAIL;
}
strcpy(entry->uid, uid);
strcpy(entry->aes, aes);
entry->counter = sqlite3_column_int(ppStmt, 2);
entry->session = sqlite3_column_int(ppStmt, 3);
entry->id = id;
//printf("counter: %d - session: %d\n", entry->counter, entry->session);
sqlite3_finalize(ppStmt);
yubikey_hex_decode ((char *) entry->aes_bin,
entry->aes, YUBIKEY_KEY_SIZE);
return CHK_OK;
}
else
{
sqlite3_finalize(ppStmt);
return CHK_FAIL;
}
}
/**
* Setter.
*
* @param pPrivateId Hex-encoded string representing the private id Yubikey token part.
*/
void YubikoOtpKeyConfig::setPrivateId(const string &pPrivateId) {
BOOST_LOG_NAMED_SCOPE("YubikoOtpKeyConfig::setPrivateId");
string myPrivateId(pPrivateId);
trim(myPrivateId);
if (myPrivateId.size() != K_YBK_PRIVATE_ID_LEN) {
throw WrongConfigValue(WrongConfigValue::EYbkPrivateId,
K_YBK_PRIVATE_ID_LEN, myPrivateId);
}
if (getPrivateId() != pPrivateId) {
yubikey_hex_decode(reinterpret_cast<char*>(itsToken.uid),
myPrivateId.c_str(), YUBIKEY_UID_SIZE);
itsChangedFlag = true;
}
}
void YubikoOtpKeyConfig::setSecretKey(const std::string& pKey) {
BOOST_LOG_NAMED_SCOPE(
"YubikoOtpKeyConfig::setSecretKey( const std::string& pKey)");
string mySecretKey(pKey);
trim(mySecretKey);
if (mySecretKey.size() != K_SEC_KEY_SZ) {
throw WrongConfigValue(WrongConfigValue::EYbkSecretKey, K_SEC_KEY_SZ,
mySecretKey);
}
if (getSecretKey() != pKey) {
yubikey_hex_decode(reinterpret_cast<char*>(itsKey.data()),
mySecretKey.c_str(),
YUBIKEY_KEY_SIZE);
itsChangedFlag = true;
}
}
static void
hex_test2 (void)
{
char buf[1024];
char buf2[1024];
yubikey_hex_encode (buf, "test", 4);
printf ("hex-encode(\"test\") = %s\n", buf);
assert (strcmp (buf, "74657374") == 0);
printf ("Hex-2.1 success\n");
printf ("hex-decode(\"%s\") = ", buf);
yubikey_hex_decode (buf2, buf, sizeof (buf2));
printf ("%.*s\n", 4, buf2);
assert (memcmp (buf2, "test", 4) == 0);
printf ("Hex-2.2 success\n");
}
/* Decode 128 bit AES key into cfg->ykcore_config.key */
int ykp_AES_key_from_hex(YKP_CONFIG *cfg, const char *hexkey) {
char aesbin[256];
/* Make sure that the hexkey is exactly 32 characters */
if (strlen(hexkey) != 32) {
return 1; /* Bad AES key */
}
/* Make sure that the hexkey is made up of only [0-9a-f] */
if (! yubikey_hex_p(hexkey))
return 1;
yubikey_hex_decode(aesbin, hexkey, sizeof(aesbin));
memcpy(cfg->ykcore_config.key, aesbin, sizeof(cfg->ykcore_config.key));
return 0;
}
static void
hex_test5 (void)
{
char buf[1024];
char buf2[1024];
char cmp[1024];
strcpy (buf, "a2c2a");
memset (buf2, 0, sizeof (buf2));
yubikey_hex_decode (buf2, buf, sizeof (buf2));
printf ("hex-decode(\"%s\") = %x%x%x\n", buf, buf2[0], buf2[1], buf2[2]);
cmp[0] = 0xa;
cmp[1] = 0x2c;
cmp[2] = 0x2a;
assert (memcmp (buf2, cmp, 3) == 0);
printf ("Hex-5 success\n");
}
/* Decode 160 bits HMAC key, used with OATH and HMAC challenge-response.
*
* The first 128 bits of the HMAC go key into cfg->ykcore_config.key,
* and 32 bits into the first four bytes of cfg->ykcore_config.uid.
*/
int ykp_HMAC_key_from_hex(YKP_CONFIG *cfg, const char *hexkey) {
char aesbin[256];
int i;
/* Make sure that the hexkey is exactly 40 characters */
if (strlen(hexkey) != 40) {
return 1; /* Bad HMAC key */
}
/* Make sure that the hexkey is made up of only [0-9a-f] */
if (! yubikey_hex_p(hexkey))
return 1;
yubikey_hex_decode(aesbin, hexkey, sizeof(aesbin));
i = sizeof(cfg->ykcore_config.key);
memcpy(cfg->ykcore_config.key, aesbin, i);
memcpy(cfg->ykcore_config.uid, aesbin + i, 20 - i);
return 0;
}
int main(int argc, char **argv) {
char * encoded = "353f962fd41dc45f842be0e0e7888a9e8dba40a4db61bacc92dae628d90e4c4a";
unsigned char response[20];
unsigned char decoded[32];
unsigned int i;
printf("%s\n",encoded);
yubikey_hex_decode((char *)decoded, encoded, sizeof(decoded));
for (i = 0; i < 32; i++) {
printf("%02x",decoded[i]);
}
printf("\n");
memset(response,0,20);
if(yubi_hmac_challenge_response(2,(unsigned char *)&decoded,(unsigned char *)&response) == 20) {
for (i = 0; i < 20; i++) {
printf("%02x",response[i]);
}
printf("\n");
}
return 0;
}
static 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;
}
int YubiKeyUtil::hexModhexDecode(unsigned char *result, size_t *resultLen,
const char *str, size_t strLen,
size_t minSize, size_t maxSize,
bool modhex)
{
if ((strLen % 2 != 0) || (strLen < minSize) || (strLen > maxSize)) {
return -1;
}
*resultLen = strLen / 2;
if (modhex) {
if (yubikey_modhex_p(str)) {
yubikey_modhex_decode((char *)result, str, strLen);
return 1;
}
} else {
if (yubikey_hex_p(str)) {
yubikey_hex_decode((char *)result, str, strLen);
return 1;
}
}
return 0;
}
int
main (void)
{
char buf[1024];
size_t i;
int rc;
yubikey_token_st tok;
/* Test Modhex */
yubikey_modhex_encode (buf, "test", 4);
printf ("modhex-encode(\"test\") = %s\n", buf);
if (strcmp (buf, "ifhgieif") != 0)
{
printf ("ModHex failure\n");
return 1;
}
printf ("Modhex-1 success\n");
printf ("modhex-decode(\"%s\") = ", buf);
yubikey_modhex_decode (buf, buf, strlen ((char *) buf));
printf ("%.*s\n", 4, buf);
if (memcmp (buf, "test", 4) != 0)
{
printf ("ModHex failure\n");
return 1;
}
printf ("Modhex-2 success\n");
strcpy (buf, "cbdefghijklnrtuv");
rc = yubikey_modhex_p (buf);
printf ("hex-p(\"%s\") = %d\n", buf, rc);
if (!rc)
{
printf ("Hex_p failure\n");
return 1;
}
printf ("Hex-3 success\n");
strcpy (buf, "0123Xabc");
rc = yubikey_hex_p (buf);
printf ("hex-p(\"%s\") = %d\n", buf, rc);
if (rc)
{
printf ("Hex_p failure\n");
return 1;
}
printf ("Hex-3 success\n");
/* Test Hex */
yubikey_hex_encode (buf, "test", 4);
printf ("hex-encode(\"test\") = %s\n", buf);
if (strcmp (buf, "74657374") != 0)
{
printf ("Hex failure\n");
return 1;
}
printf ("Hex-1 success\n");
printf ("hex-decode(\"%s\") = ", buf);
yubikey_hex_decode (buf, buf, strlen ((char *) buf));
printf ("%.*s\n", 4, buf);
if (memcmp (buf, "test", 4) != 0)
{
printf ("Hex failure\n");
return 1;
}
printf ("Hex-2 success\n");
strcpy (buf, "0123456789abcdef");
rc = yubikey_hex_p (buf);
printf ("hex-p(\"%s\") = %d\n", buf, rc);
if (!rc)
{
printf ("Hex_p failure\n");
return 1;
}
printf ("Hex-3 success\n");
strcpy (buf, "0123Xabc");
rc = yubikey_hex_p (buf);
printf ("hex-p(\"%s\") = %d\n", buf, rc);
if (rc)
{
printf ("Hex_p failure\n");
return 1;
}
printf ("Hex-3 success\n");
/* Test AES */
{
uint8_t buf[1024];
char out[1024];
uint8_t key[16 + 1];
memcpy (buf, "0123456789abcdef\0", 17);
memcpy (key, "abcdef0123456789\0", 17);
printf ("aes-decrypt (data=%s, key=%s)\n => ", (char *) buf,
(char *) key);
yubikey_aes_decrypt (buf, key);
for (i = 0; i < 16; i++)
printf ("%02x", buf[i] & 0xFF);
printf ("\n");
if (memcmp (buf,
"\x83\x8a\x46\x7f\x34\x63\x95\x51"
"\x75\x5b\xd3\x2a\x4a\x2f\x15\xe1", 16) != 0)
{
printf ("AES failure\n");
return 1;
}
printf ("AES-1 success\n");
yubikey_aes_encrypt (buf, key);
if (memcmp (buf, "0123456789abcdef", 16) != 0)
{
printf ("AES encryption failure\n");
return 1;
}
printf ("AES-2 success\n");
/* Test OTP */
memcpy ((void *) &tok,
"\x16\xe1\xe5\xd9\xd3\x99\x10\x04\x45\x20\x07\xe3\x02\x00\x00",
16);
memcpy (key, "abcdef0123456789", 16);
yubikey_generate ((void *) &tok, key, out);
yubikey_parse ((uint8_t *) out, key, &tok);
if (memcmp
(&tok, "\x16\xe1\xe5\xd9\xd3\x99\x10\x04\x45\x20\x07\xe3\x02\x00\x00",
16) != 0)
{
printf ("OTP generation - parse failure\n");
return 1;
}
printf ("OTP-1 success\n");
}
return 0;
}
int main(int argc, char **argv)
{
YK_KEY *yk = 0;
bool error = true;
int exit_code = 0;
/* Options */
bool serial_dec = false;
bool serial_modhex = false;
bool serial_hex = false;
bool version = false;
bool touch_level = false;
bool pgm_seq = false;
bool slot1 = false;
bool slot2 = false;
bool vid = false;
bool pid = false;
bool quiet = false;
yk_errno = 0;
if (! parse_args(argc, argv,
&serial_dec, &serial_modhex, &serial_hex,
&version, &touch_level, &pgm_seq, &quiet,
&slot1, &slot2, &vid, &pid,
&exit_code))
exit(exit_code);
if (!yk_init()) {
exit_code = 1;
goto err;
}
if (!(yk = yk_open_first_key())) {
exit_code = 1;
goto err;
}
if(serial_dec || serial_modhex || serial_hex) {
unsigned int serial;
int ret = yk_get_serial(yk, 1, 0, &serial);
if(!ret) {
exit_code = 1;
goto err;
}
if(serial_dec) {
if(!quiet)
printf("serial: ");
printf("%d\n", serial);
}
if(serial_modhex || serial_hex) {
char buf[64];
char hex_serial[64];
char modhex_serial[64];
char *ptr = buf;
int chars = snprintf(buf + 1, 63, "%x", serial);
if(chars % 2 == 1) {
buf[0] = '0';
} else {
ptr += 1;
}
if(serial_hex) {
if(!quiet)
printf("serial_hex: ");
printf("%s\n", ptr);
}
if(serial_modhex) {
yubikey_hex_decode(hex_serial, ptr, strlen(ptr));
yubikey_modhex_encode(modhex_serial, hex_serial, strlen(hex_serial));
if(!quiet)
printf("serial_modhex: ");
printf("%s\n", modhex_serial);
}
}
}
if(version || touch_level || pgm_seq || slot1 || slot2) {
YK_STATUS *st = ykds_alloc();
if(!yk_get_status(yk, st)) {
ykds_free(st);
exit_code = 1;
goto err;
}
if(version) {
if(!quiet)
printf("version: ");
printf("%d.%d.%d\n", ykds_version_major(st), ykds_version_minor(st), ykds_version_build(st));
}
if(touch_level) {
if(!quiet)
printf("touch_level: ");
printf("%d\n", ykds_touch_level(st));
}
if(pgm_seq) {
if(!quiet)
printf("programming_sequence: ");
printf("%d\n", ykds_pgm_seq(st));
}
if(slot1) {
if(!quiet)
printf("slot1_status: ");
printf("%d\n", (ykds_touch_level(st) & CONFIG1_VALID) == CONFIG1_VALID);
}
if(slot2) {
if(!quiet)
printf("slot2_status: ");
printf("%d\n", (ykds_touch_level(st) & CONFIG2_VALID) == CONFIG2_VALID);
}
ykds_free(st);
}
if(vid || pid) {
int vendor_id, product_id;
if(!yk_get_key_vid_pid(yk, &vendor_id, &product_id)) {
exit_code = 1;
goto err;
}
if(vid) {
if(!quiet)
printf("vendor_id: ");
printf("%x\n", vendor_id);
}
if(pid) {
if(!quiet)
printf("product_id: ");
printf("%x\n", product_id);
}
}
exit_code = 0;
error = false;
err:
if (error || exit_code != 0) {
report_yk_error();
}
if (yk && !yk_close_key(yk)) {
report_yk_error();
exit_code = 2;
}
if (!yk_release()) {
report_yk_error();
exit_code = 2;
}
exit(exit_code);
}
int
main (int argc, char *argv[])
{
uint8_t buf[128];
uint8_t key[YUBIKEY_KEY_SIZE];
char *aeskey, *token;
yubikey_token_st tok;
/* Parse command line parameters. */
if (argc <= 2)
{
printf ("Usage: %s <aeskey> <token>\n", argv[0]);
printf (" AESKEY:\tHex encoded AES-key.\n");
printf (" TOKEN:\t\tModHex encoded token.\n");
return EXIT_FAILURE;
}
aeskey = argv[1];
token = argv[2];
if (strlen (aeskey) != 32)
{
printf ("error: Hex encoded AES-key must be 32 characters.\n");
return EXIT_FAILURE;
}
if (strlen (token) > 32)
{
printf ("warning: overlong token, ignoring prefix: %.*s\n",
(int) strlen (token) - 32, token);
token = token + (strlen (token) - 32);
}
if (strlen (token) != 32)
{
printf ("error: ModHex encoded token must be 32 characters.\n");
return EXIT_FAILURE;
}
/* Debug. */
printf ("Input:\n");
printf (" token: %s\n", token);
yubikey_modhex_decode ((char *) key, token, YUBIKEY_KEY_SIZE);
{
size_t i;
printf (" ");
for (i = 0; i < YUBIKEY_KEY_SIZE; i++)
printf ("%02x ", key[i] & 0xFF);
printf ("\n");
}
printf (" aeskey: %s\n", aeskey);
yubikey_hex_decode ((char *) key, aeskey, YUBIKEY_KEY_SIZE);
{
size_t i;
printf (" ");
for (i = 0; i < YUBIKEY_KEY_SIZE; i++)
printf ("%02x ", key[i] & 0xFF);
printf ("\n");
}
/* Pack up dynamic password, decrypt it and verify checksum */
yubikey_parse ((uint8_t *) token, key, &tok);
printf ("Output:\n");
{
size_t i;
printf (" ");
for (i = 0; i < YUBIKEY_BLOCK_SIZE; i++)
printf ("%02x ", ((uint8_t *) & tok)[i] & 0xFF);
printf ("\n");
}
printf ("\nStruct:\n");
/* Debug */
{
size_t i;
printf (" uid: ");
for (i = 0; i < YUBIKEY_UID_SIZE; i++)
printf ("%02x ", tok.uid[i] & 0xFF);
printf ("\n");
}
printf (" counter: %d (0x%04x)\n", tok.ctr, tok.ctr);
printf (" timestamp (low): %d (0x%04x)\n", tok.tstpl, tok.tstpl);
printf (" timestamp (high): %d (0x%02x)\n", tok.tstph, tok.tstph);
printf (" session use: %d (0x%02x)\n", tok.use, tok.use);
printf (" random: %d (0x%02x)\n", tok.rnd, tok.rnd);
printf (" crc: %d (0x%04x)\n", tok.crc, tok.crc);
printf ("\nDerived:\n");
printf (" cleaned counter: %d (0x%04x)\n",
yubikey_counter (tok.ctr), yubikey_counter (tok.ctr));
yubikey_modhex_encode ((char *) buf, (char *) tok.uid, YUBIKEY_UID_SIZE);
printf (" modhex uid: %s\n", buf);
printf (" triggered by caps lock: %s\n",
yubikey_capslock (tok.ctr) ? "yes" : "no");
printf (" crc: %04X\n", yubikey_crc16 ((void *) &tok, YUBIKEY_KEY_SIZE));
printf (" crc check: ");
if (yubikey_crc_ok_p ((uint8_t *) & tok))
{
printf ("ok\n");
return EXIT_SUCCESS;
}
printf ("fail\n");
return EXIT_FAILURE;
}
static int yubikey_auth_core(myConf_t *myConf, REQUEST *request)
{
int passLen = 0, session = 0, counter = 0, i = 0;
MD5_CTX ctx;
int result = 0;
char *filename = "/usr/local/etc/raddb/yubico/users";
//get password by removing the last 32 characters of the password
if (strlen(request->password->vp_strvalue) <= 32)
{
DEBUG("rlm_yubikey: Password too short.");
return RLM_MODULE_REJECT;
}
passLen = strlen(request->password->vp_strvalue) - 32;
strncpy(myConf->pass, request->password->vp_strvalue, passLen);
myConf->pass[passLen] = '\0';
strncpy(myConf->token, request->password->vp_strvalue + passLen, 32);
myConf->token[32] = '\0';
//md5 stuff
MD5Init(&ctx);
DEBUG("rlm_yubikey: length: %d, string: %s", passLen, myConf->pass);
MD5Update(&ctx, (unsigned char *)myConf->pass, passLen);
MD5Final(&ctx);
MD5toString(&ctx, myConf->md5ComputedString);
myConf->md5ComputedString[32] = '\0';
DEBUG("rlm_yubikey: MD5string of your pass: %s", myConf->md5ComputedString);
DEBUG("rlm_yubikey: Username: %s", request->username->vp_strvalue);
//read file
result = config_read_file(&(myConf->config), filename);
if (result != CONFIG_TRUE)
{
DEBUG("rlm_yubikey: Failed to parse configuration file: config_read_file (&config, filename);");
DEBUG("config_error_text()= %s and config_error_line()=%d", config_error_text(&(myConf->config)), config_error_line(&(myConf->config)));
return RLM_MODULE_FAIL;
}
//parse file
myConf->config_setting = config_lookup(&(myConf->config), USERS_PATH);
if (myConf->config_setting == NULL)
{
DEBUG("rlm_yubikey: Failed to parse configuration file: config_lookup failed to find the users node");
return RLM_MODULE_FAIL;
}
//go through the list of users
for (i = 0; i < config_setting_length(myConf->config_setting); i++)
{
DEBUG("Trying i: %d", i);
config_setting_t *tmpSetting = NULL;
tmpSetting = config_setting_get_elem(myConf->config_setting, i);
if (tmpSetting == NULL)
{
DEBUG("rlm_yubikey: Failed to parse configuration file: config_setting_get_elem(config_setting,i);");
return RLM_MODULE_FAIL;
}
if ((config_setting_get_string_elem(tmpSetting, 0) == NULL) ||
(config_setting_get_string_elem(tmpSetting, 1) == NULL) ||
(config_setting_get_string_elem(tmpSetting, 2) == NULL))
{
DEBUG("rlm_yubikey: Failed to parse configuration file while reading the username/password/aeskey triplet ");
return RLM_MODULE_FAIL;
}
//check usernames are equal
if (strcmp(request->username->vp_strvalue, config_setting_get_string_elem(tmpSetting, 0)) != 0)
{
//users do not match. No need to debug this
//Go to next iteration
continue;
}
//check passwords are equal
if (strcmp(myConf->md5ComputedString, config_setting_get_string_elem(tmpSetting, 1)) != 0)
{
//passwords do not match. We debug
DEBUG("rlm_yubikey: Password does not match for user %s", request->username->vp_strvalue);
//Go to next iteration
continue;
}
//check aes stuff - mostly copied from the ykdebug.c that comes with the low-level yubikey library
uint8_t buf[128];
const char *aeskey = config_setting_get_string_elem(tmpSetting, 2);
char *token = myConf->token;
uint8_t key[YUBIKEY_KEY_SIZE];
yubikey_token_st tok;
yubikey_modhex_decode((char*) key, token, YUBIKEY_KEY_SIZE);
DEBUG("rlm_yubikey: aeskey: %s", aeskey);
yubikey_hex_decode((char*) key, aeskey, YUBIKEY_KEY_SIZE);
/* Pack up dynamic password, decrypt it and verify checksum */
yubikey_parse((uint8_t*) token, key, &tok);
DEBUG("rlm_yubikey: Struct:");
size_t i;
char *tmp = (char*) malloc(1024);
for (i = 0; i < YUBIKEY_UID_SIZE; i++)
{
sprintf(tmp + i, "%c ", tok.uid[i] & 0xFF);
}
tmp[YUBIKEY_UID_SIZE + i] = 0;
DEBUG("rlm_yubikey: uid:%s", tmp);
free(tmp);
DEBUG("rlm_yubikey: counter: %d (0x%04x)", tok.ctr, tok.ctr);
DEBUG("rlm_yubikey: timestamp (low): %d (0x%04x)", tok.tstpl, tok.tstpl);
DEBUG("rlm_yubikey: timestamp (high): %d (0x%02x)", tok.tstph, tok.tstph);
DEBUG("rlm_yubikey: session use: %d (0x%02x)", tok.use, tok.use);
DEBUG("rlm_yubikey: random: %d (0x%02x)", tok.rnd, tok.rnd);
DEBUG("rlm_yubikey: crc: %d (0x%04x)", tok.crc, tok.crc);
DEBUG("rlm_yubikey: Derived:");
DEBUG("rlm_yubikey: cleaned counter: %d (0x%04x)",yubikey_counter(tok.ctr), yubikey_counter(tok.ctr));
yubikey_modhex_encode((char*) buf, (char*) tok.uid, YUBIKEY_UID_SIZE);
DEBUG("rlm_yubikey: modhex uid: %s", buf);
DEBUG("rlm_yubikey: triggered by caps lock: %s", yubikey_capslock(tok.ctr) ? "yes" : "no");
DEBUG("rlm_yubikey: crc: %04X", yubikey_crc16((void*) & tok, YUBIKEY_KEY_SIZE));
DEBUG("rlm_yubikey: crc check: ");
if (yubikey_crc_ok_p((uint8_t*) & tok))
{
DEBUG("rlm_yubikey: ok");
char *tmppath = KEYS_PATH;
char *path = (char*) malloc(strlen(tmppath) + 32 + 1);
strcpy(path, tmppath);
strcat(path, aeskey);
myConf->config_setting = config_lookup(&(myConf->config), path);
if (myConf->config_setting == NULL)
{
DEBUG("rlm_yubikey: Error parsing file: %s not found", path);
return RLM_MODULE_FAIL;
}
//checking counter and session and update them if necessary
counter = config_setting_get_int_elem(myConf->config_setting, 0);
session = config_setting_get_int_elem(myConf->config_setting, 1);
DEBUG("rlm_yubikey: Read counter: %d, session: %d", counter, session);
if ((tok.ctr < counter)||((tok.ctr == counter) && (tok.use <= session)))
{
DEBUG("rlm_yubikey: someone tried to login with an old generated hash");
return RLM_MODULE_REJECT;
}
//updating config file with counter and session
config_setting_set_int_elem(myConf->config_setting, 0, tok.ctr);
config_setting_set_int_elem(myConf->config_setting, 1, tok.use);
DEBUG("rlm_yubikey: Written element: %ld", config_setting_get_int_elem(myConf->config_setting, 0));
DEBUG("rlm_yubikey: Written element: %ld", config_setting_get_int_elem(myConf->config_setting, 1));
if (CONFIG_FALSE == config_write_file(&(myConf->config), filename))
{
DEBUG("rlm_yubikey: Failed to write the file.");
return RLM_MODULE_FAIL;
}
return RLM_MODULE_OK;
}
DEBUG("rlm_yubikey: fail");
}
DEBUG("rlm_yubikey: Authenticating with password %s", request->password->vp_strvalue);
return RLM_MODULE_REJECT;
}
static int
yubikey_login(const char *username, const char *password)
{
char fn[MAXPATHLEN];
char hexkey[33], key[YUBIKEY_KEY_SIZE];
char hexuid[13], uid[YUBIKEY_UID_SIZE];
FILE *f;
yubikey_token_st tok;
u_int32_t last_ctr = 0, ctr;
int r, i = 0, mapok = 0, crcok = 0;
snprintf(fn, sizeof(fn), "%s/%s.uid", path, username);
if ((f = fopen(fn, "r")) == NULL) {
syslog(LOG_ERR, "user %s: fopen: %s: %m", username, fn);
return (AUTH_FAILED);
}
if (fscanf(f, "%12s", hexuid) != 1) {
syslog(LOG_ERR, "user %s: fscanf: %s: %m", username, fn);
fclose(f);
return (AUTH_FAILED);
}
fclose(f);
snprintf(fn, sizeof(fn), "%s/%s.key", path, username);
if ((f = fopen(fn, "r")) == NULL) {
syslog(LOG_ERR, "user %s: fopen: %s: %m", username, fn);
return (AUTH_FAILED);
}
if (fscanf(f, "%32s", hexkey) != 1) {
syslog(LOG_ERR, "user %s: fscanf: %s: %m", username, fn);
fclose(f);
return (AUTH_FAILED);
}
fclose(f);
if (strlen(hexkey) != 32) {
syslog(LOG_ERR, "user %s: key len != 32", username);
return (AUTH_FAILED);
}
snprintf(fn, sizeof(fn), "%s/%s.ctr", path, username);
if ((f = fopen(fn, "r")) != NULL) {
if (fscanf(f, "%u", &last_ctr) != 1)
last_ctr = 0;
fclose(f);
}
yubikey_hex_decode(uid, hexuid, YUBIKEY_UID_SIZE);
yubikey_hex_decode(key, hexkey, YUBIKEY_KEY_SIZE);
/*
* Cycle through the key mapping table.
* XXX brute force, unoptimized; a lookup table for valid mappings may
* be appropriate.
*/
while (1) {
r = yubikey_parse((uint8_t *)password, (uint8_t *)key, &tok, i++);
switch (r) {
case EMSGSIZE:
syslog(LOG_INFO, "user %s failed: password too short.",
username);
return (AUTH_FAILED);
case EINVAL: /* keyboard mapping invalid */
continue;
case 0: /* found a valid keyboard mapping */
mapok++;
if (!yubikey_crc_ok_p((uint8_t *)&tok))
continue; /* try another one */
crcok++;
syslog(LOG_DEBUG, "user %s: crc %04x ok",
username, tok.crc);
if (memcmp(tok.uid, uid, YUBIKEY_UID_SIZE)) {
char h[13];
yubikey_hex_encode(h, (const char *)tok.uid,
YUBIKEY_UID_SIZE);
syslog(LOG_DEBUG, "user %s: uid %s != %s",
username, h, hexuid);
continue; /* try another one */
}
break; /* uid matches */
case -1:
syslog(LOG_INFO, "user %s: could not decode password "
"with any keymap (%d crc ok)",
username, crcok);
return (AUTH_FAILED);
default:
syslog(LOG_DEBUG, "user %s failed: %s",
username, strerror(r));
return (AUTH_FAILED);
}
break; /* only reached through the bottom of case 0 */
}
syslog(LOG_INFO, "user %s uid %s: %d matching keymaps (%d checked), "
"%d crc ok", username, hexuid, mapok, i, crcok);
ctr = ((u_int32_t)yubikey_counter(tok.ctr) << 8) | tok.use;
if (ctr <= last_ctr) {
syslog(LOG_INFO, "user %s: counter %u.%u <= %u.%u "
"(REPLAY ATTACK!)", username, ctr / 256, ctr % 256,
last_ctr / 256, last_ctr % 256);
return (AUTH_FAILED);
}
syslog(LOG_INFO, "user %s: counter %u.%u > %u.%u",
username, ctr / 256, ctr % 256, last_ctr / 256, last_ctr % 256);
umask(S_IRWXO);
if ((f = fopen(fn, "w")) == NULL) {
syslog(LOG_ERR, "user %s: fopen: %s: %m", username, fn);
return (AUTH_FAILED);
}
fprintf(f, "%u", ctr);
fclose(f);
return (AUTH_OK);
}
int
load_chalresp_state(FILE *f, CR_STATE *state, bool verbose)
{
/*
* Load the current challenge and expected response information from a file handle.
*
* Format is hex(challenge):hex(response):slot num
*/
char challenge_hex[CR_CHALLENGE_SIZE * 2 + 1], response_hex[CR_RESPONSE_SIZE * 2 + 1];
char salt_hex[CR_SALT_SIZE * 2 + 1];
unsigned int iterations;
int slot;
int r;
if (! f)
goto out;
/* XXX not ideal with hard coded lengths in this scan string.
* 126 corresponds to twice the size of CR_CHALLENGE_SIZE,
* 40 is twice the size of CR_RESPONSE_SIZE
* (twice because we hex encode the challenge and response)
*/
r = fscanf(f, "v2:%126[0-9a-z]:%40[0-9a-z]:%64[0-9a-z]:%d:%d", challenge_hex, response_hex, salt_hex, &iterations, &slot);
if(r == 5) {
if (! yubikey_hex_p(salt_hex)) {
D(("Invalid salt hex input : %s", salt_hex));
goto out;
}
if(verbose) {
D(("Challenge: %s, hashed response: %s, salt: %s, iterations: %d, slot: %d",
challenge_hex, response_hex, salt_hex, iterations, slot));
}
yubikey_hex_decode(state->salt, salt_hex, sizeof(state->salt));
state->salt_len = strlen(salt_hex) / 2;
} else {
rewind(f);
r = fscanf(f, "v1:%126[0-9a-z]:%40[0-9a-z]:%d", challenge_hex, response_hex, &slot);
if (r != 3) {
D(("Could not parse contents of chalresp_state file (%i)", r));
goto out;
}
if (verbose) {
D(("Challenge: %s, expected response: %s, slot: %d", challenge_hex, response_hex, slot));
}
iterations = CR_DEFAULT_ITERATIONS;
}
state->iterations = iterations;
if (! yubikey_hex_p(challenge_hex)) {
D(("Invalid challenge hex input : %s", challenge_hex));
goto out;
}
if (! yubikey_hex_p(response_hex)) {
D(("Invalid expected response hex input : %s", response_hex));
goto out;
}
if (slot != 1 && slot != 2) {
D(("Invalid slot input : %i", slot));
goto out;
}
yubikey_hex_decode(state->challenge, challenge_hex, sizeof(state->challenge));
state->challenge_len = strlen(challenge_hex) / 2;
yubikey_hex_decode(state->response, response_hex, sizeof(state->response));
state->response_len = strlen(response_hex) / 2;
state->slot = slot;
return 1;
out:
return 0;
}
int main(int argc, char **argv)
{
YK_KEY *yk = 0;
bool error = true;
int exit_code = 0;
/* Options */
bool serial_dec = false;
bool serial_modhex = false;
bool serial_hex = false;
bool version = false;
bool touch_level = false;
bool pgm_seq = false;
bool quiet = false;
yk_errno = 0;
if (! parse_args(argc, argv,
&serial_dec, &serial_modhex, &serial_hex,
&version, &touch_level, &pgm_seq, &quiet,
&exit_code))
exit(exit_code);
if (!yk_init()) {
exit_code = 1;
goto err;
}
if (!(yk = yk_open_first_key())) {
exit_code = 1;
goto err;
}
if(serial_dec || serial_modhex || serial_hex) {
unsigned int serial;
int ret = yk_get_serial(yk, 1, 0, &serial);
if(!ret) {
exit_code = 1;
goto err;
}
if(serial_dec) {
if(!quiet)
printf("serial: ");
printf("%d\n", serial);
}
if(serial_hex) {
if(!quiet)
printf("serial_hex: ");
printf("%x\n", serial);
}
if(serial_modhex) {
char buf[64];
char hex_serial[64];
char modhex_serial[64];
snprintf(buf, 64, "%x", serial);
yubikey_hex_decode(hex_serial, buf, strlen(buf));
yubikey_modhex_encode(modhex_serial, hex_serial, strlen(hex_serial));
if(!quiet)
printf("serial_modhex: ");
printf("%s\n", modhex_serial);
}
}
if(version || touch_level || pgm_seq) {
YK_STATUS *st = ykds_alloc();
if(!yk_get_status(yk, st)) {
ykds_free(st);
exit_code = 1;
goto err;
}
if(version) {
if(!quiet)
printf("version: ");
printf("%d.%d.%d\n", ykds_version_major(st), ykds_version_minor(st), ykds_version_build(st));
}
if(touch_level) {
if(!quiet)
printf("touch_level: ");
printf("%d\n", ykds_touch_level(st));
}
if(pgm_seq) {
if(!quiet)
printf("programming_sequence: ");
printf("%d\n", ykds_pgm_seq(st));
}
ykds_free(st);
}
exit_code = 0;
error = false;
err:
if (error || exit_code != 0) {
report_yk_error();
}
if (yk && !yk_close_key(yk)) {
report_yk_error();
exit_code = 2;
}
if (!yk_release()) {
report_yk_error();
exit_code = 2;
}
exit(exit_code);
}
