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-rw-r--r--bin/ykfde.c61
1 files changed, 21 insertions, 40 deletions
diff --git a/bin/ykfde.c b/bin/ykfde.c
index cace8b2..21e7bea 100644
--- a/bin/ykfde.c
+++ b/bin/ykfde.c
@@ -57,12 +57,12 @@ const static struct option options_long[] = {
int main(int argc, char **argv) {
unsigned int version = 0, help = 0;
char challenge_old[CHALLENGELEN + 1],
- challenge_old_no_2f[CHALLENGELEN + 1],
challenge_new[CHALLENGELEN + 1],
response_old[RESPONSELEN],
response_new[RESPONSELEN],
passphrase_old[PASSPHRASELEN + 1],
passphrase_new[PASSPHRASELEN + 1];
+ const char * tmp;
char challengefilename[sizeof(CHALLENGEDIR) + 11 /* "/challenge-" */ + 10 /* unsigned int in char */ + 1],
challengefiletmpname[sizeof(CHALLENGEDIR) + 11 /* "/challenge-" */ + 10 /* unsigned int in char */ + 7 /* -XXXXXX */ + 1];
int challengefile = 0, challengefiletmp = 0;
@@ -76,7 +76,6 @@ int main(int argc, char **argv) {
crypt_status_info cryptstatus;
crypt_keyslot_info cryptkeyslot;
/* keyutils */
- int second_factor = 1;
key_serial_t key;
void * payload = NULL;
char * new_2nd_factor = NULL;
@@ -125,7 +124,6 @@ int main(int argc, char **argv) {
/* initialize static buffers */
memset(challenge_old, 0, CHALLENGELEN + 1);
- memset(challenge_old_no_2f, 0, CHALLENGELEN + 1);
memset(challenge_new, 0, CHALLENGELEN + 1);
memset(response_old, 0, RESPONSELEN);
memset(response_new, 0, RESPONSELEN);
@@ -154,7 +152,7 @@ int main(int argc, char **argv) {
if ((yk = yk_open_first_key()) == NULL) {
rc = EXIT_FAILURE;
- perror("yk_open_first_key() failed");
+ fprintf(stderr, "No Yubikey available.\n");
goto out30;
}
@@ -229,11 +227,9 @@ int main(int argc, char **argv) {
/* now that the new challenge has been written to file...
* add second factor to new challenge */
- if (second_factor) {
- const char * tmp = new_2nd_factor ? new_2nd_factor : payload;
- plen = strlen(tmp);
- memcpy(challenge_new, tmp, plen < CHALLENGELEN / 2 ? plen : CHALLENGELEN / 2);
- }
+ tmp = new_2nd_factor ? new_2nd_factor : payload;
+ plen = strlen(tmp);
+ memcpy(challenge_new, tmp, plen < CHALLENGELEN / 2 ? plen : CHALLENGELEN / 2);
/* do challenge/response and encode to hex */
if ((rc = yk_challenge_response(yk, yk_slot, true,
@@ -280,38 +276,24 @@ int main(int argc, char **argv) {
challengefile = close(challengefile);
/* finished reading challenge */
- /* create a copy for second run in loop */
- memcpy(challenge_old_no_2f, challenge_old, CHALLENGELEN);
-
/* copy the second factor */
- if (second_factor) {
- plen = strlen(payload);
- memcpy(challenge_old, payload, plen < CHALLENGELEN / 2 ? plen : CHALLENGELEN / 2);
+ plen = strlen(payload);
+ memcpy(challenge_old, payload, plen < CHALLENGELEN / 2 ? plen : CHALLENGELEN / 2);
+
+ /* do challenge/response and encode to hex */
+ if ((rc = yk_challenge_response(yk, yk_slot, true,
+ CHALLENGELEN, (unsigned char *) challenge_old,
+ RESPONSELEN, (unsigned char *) response_old)) < 0) {
+ perror("yk_challenge_response() failed");
+ goto out60;
}
+ yubikey_hex_encode((char *) passphrase_old, (char *) response_old, SHA1_DIGEST_SIZE);
- /* try old with and without 2nd factor */
- for (uint8_t i = 0; i < 1 + second_factor; i++) {
- /* do challenge/response and encode to hex */
- if ((rc = yk_challenge_response(yk, yk_slot, true,
- CHALLENGELEN, (unsigned char *) challenge_old,
- RESPONSELEN, (unsigned char *) response_old)) < 0) {
- perror("yk_challenge_response() failed");
- goto out60;
- }
- yubikey_hex_encode((char *) passphrase_old, (char *) response_old, SHA1_DIGEST_SIZE);
-
- if ((rc = crypt_keyslot_change_by_passphrase(cryptdevice, luks_slot, luks_slot,
- passphrase_old, PASSPHRASELEN,
- passphrase_new, PASSPHRASELEN)) < 0) {
- fprintf(stderr, "Could not update passphrase for key slot %d on %s try.\n",
- luks_slot, i ? "second" : "first");
- if (!second_factor || i > 0)
- goto out60;
- } else
- break;
-
- /* copy back... */
- memcpy(challenge_old, challenge_old_no_2f, CHALLENGELEN);
+ if ((rc = crypt_keyslot_change_by_passphrase(cryptdevice, luks_slot, luks_slot,
+ passphrase_old, PASSPHRASELEN,
+ passphrase_new, PASSPHRASELEN)) < 0) {
+ fprintf(stderr, "Could not update passphrase for key slot %d.\n", luks_slot);
+ goto out60;
}
if ((rc = unlink(challengefilename)) < 0) {
@@ -321,7 +303,7 @@ int main(int argc, char **argv) {
} else { /* ck == CRYPT_SLOT_INACTIVE */
if ((rc = crypt_keyslot_add_by_passphrase(cryptdevice, luks_slot, NULL, 0,
passphrase_new, PASSPHRASELEN)) < 0) {
- fprintf(stderr, "Could add passphrase for key slot %d.\n", luks_slot);
+ fprintf(stderr, "Could not add passphrase for key slot %d.\n", luks_slot);
goto out60;
}
}
@@ -364,7 +346,6 @@ out10:
/* wipe response (cleartext password!) from memory */
/* This is statically allocated and always save to wipe! */
memset(challenge_old, 0, CHALLENGELEN + 1);
- memset(challenge_old_no_2f, 0, CHALLENGELEN + 1);
memset(challenge_new, 0, CHALLENGELEN + 1);
memset(response_old, 0, RESPONSELEN);
memset(response_new, 0, RESPONSELEN);