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-rw-r--r--udev/ykfde.c75
1 files changed, 39 insertions, 36 deletions
diff --git a/udev/ykfde.c b/udev/ykfde.c
index 51a8e17..c97c9bd 100644
--- a/udev/ykfde.c
+++ b/udev/ykfde.c
@@ -40,7 +40,7 @@
#define ASK_MESSAGE "Please enter passphrase for disk"
#define CONFIGFILE "/etc/ykfde.conf"
-#define CHALLENGEFILE "/ykfde-challenge"
+#define CHALLENGEDIR "/etc/ykfde.d/"
static int send_on_socket(int fd, const char *socket_name, const void *packet, size_t size) {
union {
@@ -112,6 +112,7 @@ int main(int argc, char **argv) {
/* read challenge */
size_t fsize;
char * challenge;
+ char challengefilename[sizeof(CHALLENGEDIR) + 11 /* "/challenge-" */ + 10 /* unsigned int in char */ + 1];
FILE * challengefile;
/* read dir */
DIR * dir;
@@ -124,14 +125,33 @@ int main(int argc, char **argv) {
/* reopening stderr to /dev/console may help debugging... */
/* freopen("/dev/console", "w", stderr); */
- /* check if challenge file exists */
- if (access(CHALLENGEFILE, R_OK) == -1)
+ /* init and open first Yubikey */
+ if (!yk_init()) {
+ perror("yk_init() failed");
goto out10;
+ }
+
+ if ((yk = yk_open_first_key()) == NULL) {
+ perror("yk_open_first_key() failed");
+ goto out20;
+ }
+
+ /* read the serial number from key */
+ if(!yk_get_serial(yk, 0, 0, &serial)) {
+ perror("yk_get_serial() failed");
+ goto out30;
+ }
+
+ sprintf(challengefilename, CHALLENGEDIR "/challenge-%d", serial);
+
+ /* check if challenge file exists */
+ if (access(challengefilename, R_OK) == -1)
+ goto out30;
/* read challenge from file */
- if ((challengefile = fopen(CHALLENGEFILE, "r")) == NULL) {
+ if ((challengefile = fopen(challengefilename, "r")) == NULL) {
perror("Failed opening challenge file for reading");
- goto out10;
+ goto out30;
}
fseek(challengefile, 0, SEEK_END);
fsize = ftell(challengefile);
@@ -139,33 +159,16 @@ int main(int argc, char **argv) {
if ((challenge = malloc(fsize + 1)) == NULL) {
perror("malloc() failed");
- goto out20;
+ goto out40;
}
if ((fread(challenge, fsize, 1, challengefile)) != 1) {
perror("Failed reading challenge from file");
- goto out30;
+ goto out50;
}
challenge[fsize] = 0;
/* finished reading challenge */
- /* init and open Yubikey */
- if (!yk_init()) {
- perror("yk_init() failed");
- goto out30;
- }
-
- if ((yk = yk_open_first_key()) == NULL) {
- perror("yk_open_first_key() failed");
- goto out40;
- }
-
- /* read the serial number from key */
- if(!yk_get_serial(yk, 0, 0, &serial)) {
- perror("yk_get_serial() failed");
- goto out40;
- }
-
/* try to read config file
* if anything here fails we do not care... slot 2 is the default */
if ((ini = iniparser_load(CONFIGFILE)) != NULL) {
@@ -255,6 +258,17 @@ out60:
close(fd_inotify);
out50:
+ /* free challenge */
+ free(challenge);
+
+out40:
+ /* close the challenge file */
+ fclose(challengefile);
+ /* Unlink it if we were successful, we can not try again later! */
+ if (ret == EXIT_SUCCESS)
+ unlink(challengefilename);
+
+out30:
/* wipe response (cleartext password!) from memory */
memset(response, 0, sizeof(response));
memset(response_hex, 0, sizeof(response_hex));
@@ -264,22 +278,11 @@ out50:
if (!yk_close_key(yk))
perror("yk_close_key() failed");
-out40:
+out20:
/* release Yubikey */
if (!yk_release())
perror("yk_release() failed");
-out30:
- /* free challenge */
- free(challenge);
-
-out20:
- /* close the challenge file */
- fclose(challengefile);
- /* Unlink it if we were successful, we can not try again later! */
- if (ret == EXIT_SUCCESS)
- unlink(CHALLENGEFILE);
-
out10:
return ret;
}