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-rw-r--r--client/cifs.upcall.c63
1 files changed, 33 insertions, 30 deletions
diff --git a/client/cifs.upcall.c b/client/cifs.upcall.c
index 926ec2064d..0ddcc75660 100644
--- a/client/cifs.upcall.c
+++ b/client/cifs.upcall.c
@@ -32,11 +32,11 @@ create dns_resolver * * /usr/local/sbin/cifs.upcall %k
const char *CIFSSPNEGO_VERSION = "1.2";
static const char *prog = "cifs.upcall";
-typedef enum _secType {
+typedef enum _sectype {
NONE = 0,
KRB5,
MS_KRB5
-} secType_t;
+} sectype_t;
/*
* given a process ID, get the value of the KRB5CCNAME environment variable
@@ -156,9 +156,16 @@ handle_krb5_mech(const char *oid, const char *principal, DATA_BLOB *secblob,
#define DKD_HAVE_PID 0x40
#define DKD_MUSTHAVE_SET (DKD_HAVE_HOSTNAME|DKD_HAVE_VERSION|DKD_HAVE_SEC)
+static struct decoded_args {
+ int ver;
+ char *hostname;
+ uid_t uid;
+ pid_t pid;
+ sectype_t sec;
+};
+
static int
-decode_key_description(const char *desc, int *ver, secType_t *sec,
- char **hostname, uid_t *uid, pid_t *pid)
+decode_key_description(const char *desc, struct decoded_args *arg)
{
int retval = 0;
char *pos;
@@ -175,9 +182,9 @@ decode_key_description(const char *desc, int *ver, secType_t *sec,
len = pos - tkn;
len -= 4;
- SAFE_FREE(*hostname);
- *hostname = SMB_XMALLOC_ARRAY(char, len);
- strlcpy(*hostname, tkn + 5, len);
+ SAFE_FREE(arg->hostname);
+ arg->hostname = SMB_XMALLOC_ARRAY(char, len);
+ strlcpy(arg->hostname, tkn + 5, len);
retval |= DKD_HAVE_HOSTNAME;
} else if (strncmp(tkn, "ipv4=", 5) == 0) {
/* BB: do we need it if we have hostname already? */
@@ -185,7 +192,7 @@ decode_key_description(const char *desc, int *ver, secType_t *sec,
/* BB: do we need it if we have hostname already? */
} else if (strncmp(tkn, "pid=", 4) == 0) {
errno = 0;
- *pid = strtol(tkn + 4, NULL, 0);
+ arg->pid = strtol(tkn + 4, NULL, 0);
if (errno != 0) {
syslog(LOG_ERR, "Invalid pid format: %s",
strerror(errno));
@@ -196,14 +203,14 @@ decode_key_description(const char *desc, int *ver, secType_t *sec,
} else if (strncmp(tkn, "sec=", 4) == 0) {
if (strncmp(tkn + 4, "krb5", 4) == 0) {
retval |= DKD_HAVE_SEC;
- *sec = KRB5;
+ arg->sec = KRB5;
} else if (strncmp(tkn + 4, "mskrb5", 6) == 0) {
retval |= DKD_HAVE_SEC;
- *sec = MS_KRB5;
+ arg->sec = MS_KRB5;
}
} else if (strncmp(tkn, "uid=", 4) == 0) {
errno = 0;
- *uid = strtol(tkn + 4, NULL, 16);
+ arg->uid = strtol(tkn + 4, NULL, 16);
if (errno != 0) {
syslog(LOG_ERR, "Invalid uid format: %s",
strerror(errno));
@@ -213,7 +220,7 @@ decode_key_description(const char *desc, int *ver, secType_t *sec,
}
} else if (strncmp(tkn, "ver=", 4) == 0) { /* if version */
errno = 0;
- *ver = strtol(tkn + 4, NULL, 16);
+ arg->ver = strtol(tkn + 4, NULL, 16);
if (errno != 0) {
syslog(LOG_ERR, "Invalid version format: %s",
strerror(errno));
@@ -293,15 +300,12 @@ int main(const int argc, char *const argv[])
struct cifs_spnego_msg *keydata = NULL;
DATA_BLOB secblob = data_blob_null;
DATA_BLOB sess_key = data_blob_null;
- secType_t sectype = NONE;
key_serial_t key = 0;
size_t datalen;
long rc = 1;
- uid_t uid = 0;
- pid_t pid = 0;
- int kernel_upcall_version = 0;
int c, use_cifs_service_prefix = 0;
- char *buf, *princ, *ccname = NULL, *hostname = NULL;
+ char *buf, *princ, *ccname = NULL;
+ struct decoded_args arg = { };
const char *oid;
openlog(prog, 0, LOG_DAEMON);
@@ -351,8 +355,7 @@ int main(const int argc, char *const argv[])
goto out;
}
- rc = decode_key_description(buf, &kernel_upcall_version, &sectype,
- &hostname, &uid, &pid);
+ rc = decode_key_description(buf, &arg);
if ((rc & DKD_MUSTHAVE_SET) != DKD_MUSTHAVE_SET) {
syslog(LOG_ERR, "unable to get necessary params from key "
"description (0x%x)", rc);
@@ -362,18 +365,18 @@ int main(const int argc, char *const argv[])
}
SAFE_FREE(buf);
- if (kernel_upcall_version > CIFS_SPNEGO_UPCALL_VERSION) {
+ if (arg.ver > CIFS_SPNEGO_UPCALL_VERSION) {
syslog(LOG_ERR, "incompatible kernel upcall version: 0x%x",
- kernel_upcall_version);
+ arg.ver);
rc = 1;
goto out;
}
if (rc & DKD_HAVE_PID)
- ccname = get_krb5_ccname(pid);
+ ccname = get_krb5_ccname(arg.pid);
if (rc & DKD_HAVE_UID) {
- rc = setuid(uid);
+ rc = setuid(arg.uid);
if (rc == -1) {
syslog(LOG_ERR, "setuid: %s", strerror(errno));
goto out;
@@ -381,11 +384,11 @@ int main(const int argc, char *const argv[])
}
// do mech specific authorization
- switch (sectype) {
+ switch (arg.sec) {
case MS_KRB5:
case KRB5:
/* for "cifs/" service name + terminating 0 */
- datalen = strlen(hostname) + 5 + 1;
+ datalen = strlen(arg.hostname) + 5 + 1;
princ = SMB_XMALLOC_ARRAY(char, datalen);
if (!princ) {
rc = 1;
@@ -397,9 +400,9 @@ int main(const int argc, char *const argv[])
else
strlcpy(princ, "host/", datalen);
- strlcpy(princ + 5, hostname, datalen - 5);
+ strlcpy(princ + 5, arg.hostname, datalen - 5);
- if (sectype == MS_KRB5)
+ if (arg.sec == MS_KRB5)
oid = OID_KERBEROS5_OLD;
else
oid = OID_KERBEROS5;
@@ -408,7 +411,7 @@ int main(const int argc, char *const argv[])
SAFE_FREE(princ);
break;
default:
- syslog(LOG_ERR, "sectype: %d is not implemented", sectype);
+ syslog(LOG_ERR, "sectype: %d is not implemented", arg.sec);
rc = 1;
break;
}
@@ -424,7 +427,7 @@ int main(const int argc, char *const argv[])
rc = 1;
goto out;
}
- keydata->version = kernel_upcall_version;
+ keydata->version = arg.ver;
keydata->flags = 0;
keydata->sesskey_len = sess_key.length;
keydata->secblob_len = secblob.length;
@@ -453,7 +456,7 @@ out:
data_blob_free(&secblob);
data_blob_free(&sess_key);
SAFE_FREE(ccname);
- SAFE_FREE(hostname);
+ SAFE_FREE(arg.hostname);
SAFE_FREE(keydata);
return rc;
}
generated by cgit (git 2.34.1) at 2025-11-04 01:17:47 +0000