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-rw-r--r--fs/cifs/cifs_ioctl.h9
-rw-r--r--fs/cifs/ioctl.c29
2 files changed, 38 insertions, 0 deletions
diff --git a/fs/cifs/cifs_ioctl.h b/fs/cifs/cifs_ioctl.h
index 6c3bd07868d7..0f0dc1c1fe41 100644
--- a/fs/cifs/cifs_ioctl.h
+++ b/fs/cifs/cifs_ioctl.h
@@ -57,9 +57,18 @@ struct smb_query_info {
/* char buffer[]; */
} __packed;
+struct smb3_key_debug_info {
+ __u64 Suid;
+ __u16 cipher_type;
+ __u8 auth_key[16]; /* SMB2_NTLMV2_SESSKEY_SIZE */
+ __u8 smb3encryptionkey[SMB3_SIGN_KEY_SIZE];
+ __u8 smb3decryptionkey[SMB3_SIGN_KEY_SIZE];
+} __packed;
+
#define CIFS_IOCTL_MAGIC 0xCF
#define CIFS_IOC_COPYCHUNK_FILE _IOW(CIFS_IOCTL_MAGIC, 3, int)
#define CIFS_IOC_SET_INTEGRITY _IO(CIFS_IOCTL_MAGIC, 4)
#define CIFS_IOC_GET_MNT_INFO _IOR(CIFS_IOCTL_MAGIC, 5, struct smb_mnt_fs_info)
#define CIFS_ENUMERATE_SNAPSHOTS _IOR(CIFS_IOCTL_MAGIC, 6, struct smb_snapshot_array)
#define CIFS_QUERY_INFO _IOWR(CIFS_IOCTL_MAGIC, 7, struct smb_query_info)
+#define CIFS_DUMP_KEY _IOWR(CIFS_IOCTL_MAGIC, 8, struct smb3_key_debug_info)
diff --git a/fs/cifs/ioctl.c b/fs/cifs/ioctl.c
index 76ddd98b6298..1a01e108d75e 100644
--- a/fs/cifs/ioctl.c
+++ b/fs/cifs/ioctl.c
@@ -164,6 +164,7 @@ static long smb_mnt_get_fsinfo(unsigned int xid, struct cifs_tcon *tcon,
long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg)
{
struct inode *inode = file_inode(filep);
+ struct smb3_key_debug_info pkey_inf;
int rc = -ENOTTY; /* strange error - but the precedent */
unsigned int xid;
struct cifsFileInfo *pSMBFile = filep->private_data;
@@ -270,6 +271,34 @@ long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg)
else
rc = -EOPNOTSUPP;
break;
+ case CIFS_DUMP_KEY:
+ if (pSMBFile == NULL)
+ break;
+ if (!capable(CAP_SYS_ADMIN)) {
+ rc = -EACCES;
+ break;
+ }
+
+ tcon = tlink_tcon(pSMBFile->tlink);
+ if (!smb3_encryption_required(tcon)) {
+ rc = -EOPNOTSUPP;
+ break;
+ }
+ pkey_inf.cipher_type =
+ le16_to_cpu(tcon->ses->server->cipher_type);
+ pkey_inf.Suid = tcon->ses->Suid;
+ memcpy(pkey_inf.auth_key, tcon->ses->auth_key.response,
+ 16 /* SMB2_NTLMV2_SESSKEY_SIZE */);
+ memcpy(pkey_inf.smb3decryptionkey,
+ tcon->ses->smb3decryptionkey, SMB3_SIGN_KEY_SIZE);
+ memcpy(pkey_inf.smb3encryptionkey,
+ tcon->ses->smb3encryptionkey, SMB3_SIGN_KEY_SIZE);
+ if (copy_to_user((void __user *)arg, &pkey_inf,
+ sizeof(struct smb3_key_debug_info)))
+ rc = -EFAULT;
+ else
+ rc = 0;
+ break;
default:
cifs_dbg(FYI, "unsupported ioctl\n");
break;