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path: root/fs/cifs/smb2pdu.c
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Diffstat (limited to 'fs/cifs/smb2pdu.c')
-rw-r--r--fs/cifs/smb2pdu.c116
1 files changed, 91 insertions, 25 deletions
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index e8d1f8c59b56..d759ecdfa9d6 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -46,6 +46,7 @@
#include "smb2status.h"
#include "smb2glob.h"
#include "cifspdu.h"
+#include "cifs_spnego.h"
/*
* The following table defines the expected "StructureSize" of SMB2 requests
@@ -427,20 +428,15 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
cifs_dbg(FYI, "missing security blob on negprot\n");
rc = cifs_enable_signing(server, ses->sign);
-#ifdef CONFIG_SMB2_ASN1 /* BB REMOVEME when updated asn1.c ready */
if (rc)
goto neg_exit;
- if (blob_length)
- rc = decode_neg_token_init(security_blob, blob_length,
- &server->sec_type);
- if (rc == 1)
- rc = 0;
- else if (rc == 0) {
- rc = -EIO;
- goto neg_exit;
+ if (blob_length) {
+ rc = decode_negTokenInit(security_blob, blob_length, server);
+ if (rc == 1)
+ rc = 0;
+ else if (rc == 0)
+ rc = -EIO;
}
-#endif
-
neg_exit:
free_rsp_buf(resp_buftype, rsp);
return rc;
@@ -534,8 +530,9 @@ SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
__le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */
struct TCP_Server_Info *server = ses->server;
u16 blob_length = 0;
- char *security_blob;
- char *ntlmssp_blob = NULL;
+ struct key *spnego_key = NULL;
+ char *security_blob = NULL;
+ unsigned char *ntlmssp_blob = NULL;
bool use_spnego = false; /* else use raw ntlmssp */
cifs_dbg(FYI, "Session Setup\n");
@@ -562,7 +559,8 @@ SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
ses->ntlmssp->sesskey_per_smbsess = true;
/* FIXME: allow for other auth types besides NTLMSSP (e.g. krb5) */
- ses->sectype = RawNTLMSSP;
+ if (ses->sectype != Kerberos && ses->sectype != RawNTLMSSP)
+ ses->sectype = RawNTLMSSP;
ssetup_ntlmssp_authenticate:
if (phase == NtLmChallenge)
@@ -591,7 +589,48 @@ ssetup_ntlmssp_authenticate:
iov[0].iov_base = (char *)req;
/* 4 for rfc1002 length field and 1 for pad */
iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
- if (phase == NtLmNegotiate) {
+
+ if (ses->sectype == Kerberos) {
+#ifdef CONFIG_CIFS_UPCALL
+ struct cifs_spnego_msg *msg;
+
+ spnego_key = cifs_get_spnego_key(ses);
+ if (IS_ERR(spnego_key)) {
+ rc = PTR_ERR(spnego_key);
+ spnego_key = NULL;
+ goto ssetup_exit;
+ }
+
+ msg = spnego_key->payload.data;
+ /*
+ * check version field to make sure that cifs.upcall is
+ * sending us a response in an expected form
+ */
+ if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) {
+ cifs_dbg(VFS,
+ "bad cifs.upcall version. Expected %d got %d",
+ CIFS_SPNEGO_UPCALL_VERSION, msg->version);
+ rc = -EKEYREJECTED;
+ goto ssetup_exit;
+ }
+ ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len,
+ GFP_KERNEL);
+ if (!ses->auth_key.response) {
+ cifs_dbg(VFS,
+ "Kerberos can't allocate (%u bytes) memory",
+ msg->sesskey_len);
+ rc = -ENOMEM;
+ goto ssetup_exit;
+ }
+ ses->auth_key.len = msg->sesskey_len;
+ blob_length = msg->secblob_len;
+ iov[1].iov_base = msg->data + msg->sesskey_len;
+ iov[1].iov_len = blob_length;
+#else
+ rc = -EOPNOTSUPP;
+ goto ssetup_exit;
+#endif /* CONFIG_CIFS_UPCALL */
+ } else if (phase == NtLmNegotiate) { /* if not krb5 must be ntlmssp */
ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE),
GFP_KERNEL);
if (ntlmssp_blob == NULL) {
@@ -614,15 +653,11 @@ ssetup_ntlmssp_authenticate:
/* with raw NTLMSSP we don't encapsulate in SPNEGO */
security_blob = ntlmssp_blob;
}
+ iov[1].iov_base = security_blob;
+ iov[1].iov_len = blob_length;
} else if (phase == NtLmAuthenticate) {
req->hdr.SessionId = ses->Suid;
- ntlmssp_blob = kzalloc(sizeof(struct _NEGOTIATE_MESSAGE) + 500,
- GFP_KERNEL);
- if (ntlmssp_blob == NULL) {
- rc = -ENOMEM;
- goto ssetup_exit;
- }
- rc = build_ntlmssp_auth_blob(ntlmssp_blob, &blob_length, ses,
+ rc = build_ntlmssp_auth_blob(&ntlmssp_blob, &blob_length, ses,
nls_cp);
if (rc) {
cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n",
@@ -641,6 +676,8 @@ ssetup_ntlmssp_authenticate:
} else {
security_blob = ntlmssp_blob;
}
+ iov[1].iov_base = security_blob;
+ iov[1].iov_len = blob_length;
} else {
cifs_dbg(VFS, "illegal ntlmssp phase\n");
rc = -EIO;
@@ -652,8 +689,6 @@ ssetup_ntlmssp_authenticate:
cpu_to_le16(sizeof(struct smb2_sess_setup_req) -
1 /* pad */ - 4 /* rfc1001 len */);
req->SecurityBufferLength = cpu_to_le16(blob_length);
- iov[1].iov_base = security_blob;
- iov[1].iov_len = blob_length;
inc_rfc1001_len(req, blob_length - 1 /* pad */);
@@ -664,6 +699,7 @@ ssetup_ntlmssp_authenticate:
kfree(security_blob);
rsp = (struct smb2_sess_setup_rsp *)iov[0].iov_base;
+ ses->Suid = rsp->hdr.SessionId;
if (resp_buftype != CIFS_NO_BUFFER &&
rsp->hdr.Status == STATUS_MORE_PROCESSING_REQUIRED) {
if (phase != NtLmNegotiate) {
@@ -681,7 +717,6 @@ ssetup_ntlmssp_authenticate:
/* NTLMSSP Negotiate sent now processing challenge (response) */
phase = NtLmChallenge; /* process ntlmssp challenge */
rc = 0; /* MORE_PROCESSING is not an error here but expected */
- ses->Suid = rsp->hdr.SessionId;
rc = decode_ntlmssp_challenge(rsp->Buffer,
le16_to_cpu(rsp->SecurityBufferLength), ses);
}
@@ -738,6 +773,10 @@ keygen_exit:
kfree(ses->auth_key.response);
ses->auth_key.response = NULL;
}
+ if (spnego_key) {
+ key_invalidate(spnego_key);
+ key_put(spnego_key);
+ }
kfree(ses->ntlmssp);
return rc;
@@ -1584,6 +1623,33 @@ SMB2_echo(struct TCP_Server_Info *server)
cifs_dbg(FYI, "In echo request\n");
+ if (server->tcpStatus == CifsNeedNegotiate) {
+ struct list_head *tmp, *tmp2;
+ struct cifs_ses *ses;
+ struct cifs_tcon *tcon;
+
+ cifs_dbg(FYI, "Need negotiate, reconnecting tcons\n");
+ spin_lock(&cifs_tcp_ses_lock);
+ list_for_each(tmp, &server->smb_ses_list) {
+ ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
+ list_for_each(tmp2, &ses->tcon_list) {
+ tcon = list_entry(tmp2, struct cifs_tcon,
+ tcon_list);
+ /* add check for persistent handle reconnect */
+ if (tcon && tcon->need_reconnect) {
+ spin_unlock(&cifs_tcp_ses_lock);
+ rc = smb2_reconnect(SMB2_ECHO, tcon);
+ spin_lock(&cifs_tcp_ses_lock);
+ }
+ }
+ }
+ spin_unlock(&cifs_tcp_ses_lock);
+ }
+
+ /* if no session, renegotiate failed above */
+ if (server->tcpStatus == CifsNeedNegotiate)
+ return -EIO;
+
rc = small_smb2_init(SMB2_ECHO, NULL, (void **)&req);
if (rc)
return rc;
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-20 06:18:07 +0000