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authorJeff Layton <jlayton@redhat.com>2012-09-18 16:20:35 -0700
committerSteve French <smfrench@gmail.com>2012-09-24 21:46:31 -0500
commitfb308a6f22f7f4f3574dab6b36c4a3598e50cf05 (patch)
treefa948996f96a226db3ec0a8b3175bdc877115458 /fs/cifs
parent97bc00b39408a4180eeeaa976d02d37121488997 (diff)
cifs: teach signing routines how to deal with arrays of pages in a smb_rqst
Use the smb_send_rqst helper function to kmap each page in the array and update the hash for that chunk. Reviewed-by: Pavel Shilovsky <pshilovsky@samba.org> Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <smfrench@gmail.com>
Diffstat (limited to 'fs/cifs')
-rw-r--r--fs/cifs/cifsencrypt.c11
-rw-r--r--fs/cifs/cifsproto.h2
-rw-r--r--fs/cifs/smb2transport.c11
-rw-r--r--fs/cifs/transport.c2
4 files changed, 25 insertions, 1 deletions
diff --git a/fs/cifs/cifsencrypt.c b/fs/cifs/cifsencrypt.c
index af520522ef20..652f5051be09 100644
--- a/fs/cifs/cifsencrypt.c
+++ b/fs/cifs/cifsencrypt.c
@@ -29,6 +29,7 @@
#include "ntlmssp.h"
#include <linux/ctype.h>
#include <linux/random.h>
+#include <linux/highmem.h>
/*
* Calculate and return the CIFS signature based on the mac key and SMB PDU.
@@ -93,6 +94,16 @@ static int cifs_calc_signature(struct smb_rqst *rqst,
}
}
+ /* now hash over the rq_pages array */
+ for (i = 0; i < rqst->rq_npages; i++) {
+ struct kvec p_iov;
+
+ cifs_rqst_page_to_kvec(rqst, i, &p_iov);
+ crypto_shash_update(&server->secmech.sdescmd5->shash,
+ p_iov.iov_base, p_iov.iov_len);
+ kunmap(rqst->rq_pages[i]);
+ }
+
rc = crypto_shash_final(&server->secmech.sdescmd5->shash, signature);
if (rc)
cERROR(1, "%s: Could not generate md5 hash", __func__);
diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h
index 8e071a5a7da4..e97a1843ab98 100644
--- a/fs/cifs/cifsproto.h
+++ b/fs/cifs/cifsproto.h
@@ -36,6 +36,8 @@ extern struct smb_hdr *cifs_buf_get(void);
extern void cifs_buf_release(void *);
extern struct smb_hdr *cifs_small_buf_get(void);
extern void cifs_small_buf_release(void *);
+extern void cifs_rqst_page_to_kvec(struct smb_rqst *rqst, unsigned int idx,
+ struct kvec *iov);
extern int smb_send(struct TCP_Server_Info *, struct smb_hdr *,
unsigned int /* length */);
extern unsigned int _get_xid(void);
diff --git a/fs/cifs/smb2transport.c b/fs/cifs/smb2transport.c
index 1850d9ec3c90..9ca4bcfb34c6 100644
--- a/fs/cifs/smb2transport.c
+++ b/fs/cifs/smb2transport.c
@@ -30,6 +30,7 @@
#include <linux/uaccess.h>
#include <asm/processor.h>
#include <linux/mempool.h>
+#include <linux/highmem.h>
#include "smb2pdu.h"
#include "cifsglob.h"
#include "cifsproto.h"
@@ -95,6 +96,16 @@ smb2_calc_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server)
}
}
+ /* now hash over the rq_pages array */
+ for (i = 0; i < rqst->rq_npages; i++) {
+ struct kvec p_iov;
+
+ cifs_rqst_page_to_kvec(rqst, i, &p_iov);
+ crypto_shash_update(&server->secmech.sdeschmacsha256->shash,
+ p_iov.iov_base, p_iov.iov_len);
+ kunmap(rqst->rq_pages[i]);
+ }
+
rc = crypto_shash_final(&server->secmech.sdeschmacsha256->shash,
sigptr);
if (rc)
diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c
index 381dbb778478..b6097344cd5b 100644
--- a/fs/cifs/transport.c
+++ b/fs/cifs/transport.c
@@ -251,7 +251,7 @@ smb_send_kvec(struct TCP_Server_Info *server, struct kvec *iov, size_t n_vec,
* The page will be kmapped and the address placed into iov_base. The length
* will then be adjusted according to the ptailoff.
*/
-static void
+void
cifs_rqst_page_to_kvec(struct smb_rqst *rqst, unsigned int idx,
struct kvec *iov)
{