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-rw-r--r--fs/cifs/cifsencrypt.c195
-rw-r--r--fs/cifs/cifsproto.h1
-rw-r--r--fs/cifs/connect.c6
-rw-r--r--fs/cifs/smb2transport.c90
4 files changed, 174 insertions, 118 deletions
diff --git a/fs/cifs/cifsencrypt.c b/fs/cifs/cifsencrypt.c
index 3d8bf941d126..45e57cc38200 100644
--- a/fs/cifs/cifsencrypt.c
+++ b/fs/cifs/cifsencrypt.c
@@ -1,7 +1,7 @@
/*
* fs/cifs/cifsencrypt.c
*
- * Copyright (C) International Business Machines Corp., 2005,2006
+ * Copyright (C) International Business Machines Corp., 2005,2013
* Author(s): Steve French (sfrench@us.ibm.com)
*
* This library is free software; you can redistribute it and/or modify
@@ -31,6 +31,36 @@
#include <linux/random.h>
#include <linux/highmem.h>
+static int
+cifs_crypto_shash_md5_allocate(struct TCP_Server_Info *server)
+{
+ int rc;
+ unsigned int size;
+
+ if (server->secmech.sdescmd5 != NULL)
+ return 0; /* already allocated */
+
+ server->secmech.md5 = crypto_alloc_shash("md5", 0, 0);
+ if (IS_ERR(server->secmech.md5)) {
+ cifs_dbg(VFS, "could not allocate crypto md5\n");
+ return PTR_ERR(server->secmech.md5);
+ }
+
+ size = sizeof(struct shash_desc) +
+ crypto_shash_descsize(server->secmech.md5);
+ server->secmech.sdescmd5 = kmalloc(size, GFP_KERNEL);
+ if (!server->secmech.sdescmd5) {
+ rc = -ENOMEM;
+ crypto_free_shash(server->secmech.md5);
+ server->secmech.md5 = NULL;
+ return rc;
+ }
+ server->secmech.sdescmd5->shash.tfm = server->secmech.md5;
+ server->secmech.sdescmd5->shash.flags = 0x0;
+
+ return 0;
+}
+
/*
* Calculate and return the CIFS signature based on the mac key and SMB PDU.
* The 16 byte signature must be allocated by the caller. Note we only use the
@@ -50,8 +80,11 @@ static int cifs_calc_signature(struct smb_rqst *rqst,
return -EINVAL;
if (!server->secmech.sdescmd5) {
- cifs_dbg(VFS, "%s: Can't generate signature\n", __func__);
- return -1;
+ rc = cifs_crypto_shash_md5_allocate(server);
+ if (rc) {
+ cifs_dbg(VFS, "%s: Can't alloc md5 crypto\n", __func__);
+ return -1;
+ }
}
rc = crypto_shash_init(&server->secmech.sdescmd5->shash);
@@ -556,6 +589,33 @@ CalcNTLMv2_response(const struct cifs_ses *ses, char *ntlmv2_hash)
return rc;
}
+static int crypto_hmacmd5_alloc(struct TCP_Server_Info *server)
+{
+ unsigned int size;
+
+ /* check if already allocated */
+ if (server->secmech.sdeschmacmd5)
+ return 0;
+
+ server->secmech.hmacmd5 = crypto_alloc_shash("hmac(md5)", 0, 0);
+ if (IS_ERR(server->secmech.hmacmd5)) {
+ cifs_dbg(VFS, "could not allocate crypto hmacmd5\n");
+ return PTR_ERR(server->secmech.hmacmd5);
+ }
+
+ size = sizeof(struct shash_desc) +
+ crypto_shash_descsize(server->secmech.hmacmd5);
+ server->secmech.sdeschmacmd5 = kmalloc(size, GFP_KERNEL);
+ if (!server->secmech.sdeschmacmd5) {
+ crypto_free_shash(server->secmech.hmacmd5);
+ server->secmech.hmacmd5 = NULL;
+ return -ENOMEM;
+ }
+ server->secmech.sdeschmacmd5->shash.tfm = server->secmech.hmacmd5;
+ server->secmech.sdeschmacmd5->shash.flags = 0x0;
+
+ return 0;
+}
int
setup_ntlmv2_rsp(struct cifs_ses *ses, const struct nls_table *nls_cp)
@@ -606,6 +666,12 @@ setup_ntlmv2_rsp(struct cifs_ses *ses, const struct nls_table *nls_cp)
memcpy(ses->auth_key.response + baselen, tiblob, tilen);
+ rc = crypto_hmacmd5_alloc(ses->server);
+ if (rc) {
+ cifs_dbg(VFS, "could not crypto alloc hmacmd5 rc %d\n", rc);
+ goto setup_ntlmv2_rsp_ret;
+ }
+
/* calculate ntlmv2_hash */
rc = calc_ntlmv2_hash(ses, ntlmv2_hash, nls_cp);
if (rc) {
@@ -705,123 +771,32 @@ calc_seckey(struct cifs_ses *ses)
void
cifs_crypto_shash_release(struct TCP_Server_Info *server)
{
- if (server->secmech.cmacaes)
+ if (server->secmech.cmacaes) {
crypto_free_shash(server->secmech.cmacaes);
+ server->secmech.cmacaes = NULL;
+ }
- if (server->secmech.hmacsha256)
+ if (server->secmech.hmacsha256) {
crypto_free_shash(server->secmech.hmacsha256);
+ server->secmech.hmacsha256 = NULL;
+ }
- if (server->secmech.md5)
+ if (server->secmech.md5) {
crypto_free_shash(server->secmech.md5);
+ server->secmech.md5 = NULL;
+ }
- if (server->secmech.hmacmd5)
+ if (server->secmech.hmacmd5) {
crypto_free_shash(server->secmech.hmacmd5);
+ server->secmech.hmacmd5 = NULL;
+ }
kfree(server->secmech.sdesccmacaes);
-
+ server->secmech.sdesccmacaes = NULL;
kfree(server->secmech.sdeschmacsha256);
-
+ server->secmech.sdeschmacsha256 = NULL;
kfree(server->secmech.sdeschmacmd5);
-
+ server->secmech.sdeschmacmd5 = NULL;
kfree(server->secmech.sdescmd5);
-}
-
-int
-cifs_crypto_shash_allocate(struct TCP_Server_Info *server)
-{
- int rc;
- unsigned int size;
-
- server->secmech.hmacmd5 = crypto_alloc_shash("hmac(md5)", 0, 0);
- if (IS_ERR(server->secmech.hmacmd5)) {
- cifs_dbg(VFS, "could not allocate crypto hmacmd5\n");
- return PTR_ERR(server->secmech.hmacmd5);
- }
-
- server->secmech.md5 = crypto_alloc_shash("md5", 0, 0);
- if (IS_ERR(server->secmech.md5)) {
- cifs_dbg(VFS, "could not allocate crypto md5\n");
- rc = PTR_ERR(server->secmech.md5);
- goto crypto_allocate_md5_fail;
- }
-
- server->secmech.hmacsha256 = crypto_alloc_shash("hmac(sha256)", 0, 0);
- if (IS_ERR(server->secmech.hmacsha256)) {
- cifs_dbg(VFS, "could not allocate crypto hmacsha256\n");
- rc = PTR_ERR(server->secmech.hmacsha256);
- goto crypto_allocate_hmacsha256_fail;
- }
-
- server->secmech.cmacaes = crypto_alloc_shash("cmac(aes)", 0, 0);
- if (IS_ERR(server->secmech.cmacaes)) {
- cifs_dbg(VFS, "could not allocate crypto cmac-aes");
- rc = PTR_ERR(server->secmech.cmacaes);
- goto crypto_allocate_cmacaes_fail;
- }
-
- size = sizeof(struct shash_desc) +
- crypto_shash_descsize(server->secmech.hmacmd5);
- server->secmech.sdeschmacmd5 = kmalloc(size, GFP_KERNEL);
- if (!server->secmech.sdeschmacmd5) {
- rc = -ENOMEM;
- goto crypto_allocate_hmacmd5_sdesc_fail;
- }
- server->secmech.sdeschmacmd5->shash.tfm = server->secmech.hmacmd5;
- server->secmech.sdeschmacmd5->shash.flags = 0x0;
-
- size = sizeof(struct shash_desc) +
- crypto_shash_descsize(server->secmech.md5);
- server->secmech.sdescmd5 = kmalloc(size, GFP_KERNEL);
- if (!server->secmech.sdescmd5) {
- rc = -ENOMEM;
- goto crypto_allocate_md5_sdesc_fail;
- }
- server->secmech.sdescmd5->shash.tfm = server->secmech.md5;
- server->secmech.sdescmd5->shash.flags = 0x0;
-
- size = sizeof(struct shash_desc) +
- crypto_shash_descsize(server->secmech.hmacsha256);
- server->secmech.sdeschmacsha256 = kmalloc(size, GFP_KERNEL);
- if (!server->secmech.sdeschmacsha256) {
- rc = -ENOMEM;
- goto crypto_allocate_hmacsha256_sdesc_fail;
- }
- server->secmech.sdeschmacsha256->shash.tfm = server->secmech.hmacsha256;
- server->secmech.sdeschmacsha256->shash.flags = 0x0;
-
- size = sizeof(struct shash_desc) +
- crypto_shash_descsize(server->secmech.cmacaes);
- server->secmech.sdesccmacaes = kmalloc(size, GFP_KERNEL);
- if (!server->secmech.sdesccmacaes) {
- cifs_dbg(VFS, "%s: Can't alloc cmacaes\n", __func__);
- rc = -ENOMEM;
- goto crypto_allocate_cmacaes_sdesc_fail;
- }
- server->secmech.sdesccmacaes->shash.tfm = server->secmech.cmacaes;
- server->secmech.sdesccmacaes->shash.flags = 0x0;
-
- return 0;
-
-crypto_allocate_cmacaes_sdesc_fail:
- kfree(server->secmech.sdeschmacsha256);
-
-crypto_allocate_hmacsha256_sdesc_fail:
- kfree(server->secmech.sdescmd5);
-
-crypto_allocate_md5_sdesc_fail:
- kfree(server->secmech.sdeschmacmd5);
-
-crypto_allocate_hmacmd5_sdesc_fail:
- crypto_free_shash(server->secmech.cmacaes);
-
-crypto_allocate_cmacaes_fail:
- crypto_free_shash(server->secmech.hmacsha256);
-
-crypto_allocate_hmacsha256_fail:
- crypto_free_shash(server->secmech.md5);
-
-crypto_allocate_md5_fail:
- crypto_free_shash(server->secmech.hmacmd5);
-
- return rc;
+ server->secmech.sdescmd5 = NULL;
}
diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h
index c8ff018fae68..f7e584d047e2 100644
--- a/fs/cifs/cifsproto.h
+++ b/fs/cifs/cifsproto.h
@@ -433,7 +433,6 @@ extern int SMBNTencrypt(unsigned char *, unsigned char *, unsigned char *,
const struct nls_table *);
extern int setup_ntlm_response(struct cifs_ses *, const struct nls_table *);
extern int setup_ntlmv2_rsp(struct cifs_ses *, const struct nls_table *);
-extern int cifs_crypto_shash_allocate(struct TCP_Server_Info *);
extern void cifs_crypto_shash_release(struct TCP_Server_Info *);
extern int calc_seckey(struct cifs_ses *);
extern void generate_smb3signingkey(struct TCP_Server_Info *);
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index afcb8a1a33b7..fa68813396b5 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -2108,12 +2108,6 @@ cifs_get_tcp_session(struct smb_vol *volume_info)
goto out_err;
}
- rc = cifs_crypto_shash_allocate(tcp_ses);
- if (rc) {
- cifs_dbg(VFS, "could not setup hash structures rc %d\n", rc);
- goto out_err;
- }
-
tcp_ses->ops = volume_info->ops;
tcp_ses->vals = volume_info->vals;
cifs_set_net_ns(tcp_ses, get_net(current->nsproxy->net_ns));
diff --git a/fs/cifs/smb2transport.c b/fs/cifs/smb2transport.c
index 09b4fbaadeb6..301b191270b9 100644
--- a/fs/cifs/smb2transport.c
+++ b/fs/cifs/smb2transport.c
@@ -39,6 +39,77 @@
#include "smb2status.h"
#include "smb2glob.h"
+static int
+smb2_crypto_shash_allocate(struct TCP_Server_Info *server)
+{
+ unsigned int size;
+
+ if (server->secmech.sdeschmacsha256 != NULL)
+ return 0; /* already allocated */
+
+ server->secmech.hmacsha256 = crypto_alloc_shash("hmac(sha256)", 0, 0);
+ if (IS_ERR(server->secmech.hmacsha256)) {
+ cifs_dbg(VFS, "could not allocate crypto hmacsha256\n");
+ return PTR_ERR(server->secmech.hmacsha256);
+ }
+
+ size = sizeof(struct shash_desc) +
+ crypto_shash_descsize(server->secmech.hmacsha256);
+ server->secmech.sdeschmacsha256 = kmalloc(size, GFP_KERNEL);
+ if (!server->secmech.sdeschmacsha256) {
+ crypto_free_shash(server->secmech.hmacsha256);
+ server->secmech.hmacsha256 = NULL;
+ return -ENOMEM;
+ }
+ server->secmech.sdeschmacsha256->shash.tfm = server->secmech.hmacsha256;
+ server->secmech.sdeschmacsha256->shash.flags = 0x0;
+
+ return 0;
+}
+
+static int
+smb3_crypto_shash_allocate(struct TCP_Server_Info *server)
+{
+ unsigned int size;
+ int rc;
+
+ if (server->secmech.sdesccmacaes != NULL)
+ return 0; /* already allocated */
+
+ rc = smb2_crypto_shash_allocate(server);
+ if (rc)
+ return rc;
+
+ server->secmech.cmacaes = crypto_alloc_shash("cmac(aes)", 0, 0);
+ if (IS_ERR(server->secmech.cmacaes)) {
+ cifs_dbg(VFS, "could not allocate crypto cmac-aes");
+ kfree(server->secmech.sdeschmacsha256);
+ server->secmech.sdeschmacsha256 = NULL;
+ crypto_free_shash(server->secmech.hmacsha256);
+ server->secmech.hmacsha256 = NULL;
+ return PTR_ERR(server->secmech.cmacaes);
+ }
+
+ size = sizeof(struct shash_desc) +
+ crypto_shash_descsize(server->secmech.cmacaes);
+ server->secmech.sdesccmacaes = kmalloc(size, GFP_KERNEL);
+ if (!server->secmech.sdesccmacaes) {
+ cifs_dbg(VFS, "%s: Can't alloc cmacaes\n", __func__);
+ kfree(server->secmech.sdeschmacsha256);
+ server->secmech.sdeschmacsha256 = NULL;
+ crypto_free_shash(server->secmech.hmacsha256);
+ crypto_free_shash(server->secmech.cmacaes);
+ server->secmech.hmacsha256 = NULL;
+ server->secmech.cmacaes = NULL;
+ return -ENOMEM;
+ }
+ server->secmech.sdesccmacaes->shash.tfm = server->secmech.cmacaes;
+ server->secmech.sdesccmacaes->shash.flags = 0x0;
+
+ return 0;
+}
+
+
int
smb2_calc_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server)
{
@@ -52,6 +123,12 @@ smb2_calc_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server)
memset(smb2_signature, 0x0, SMB2_HMACSHA256_SIZE);
memset(smb2_pdu->Signature, 0x0, SMB2_SIGNATURE_SIZE);
+ rc = smb2_crypto_shash_allocate(server);
+ if (rc) {
+ cifs_dbg(VFS, "%s: shah256 alloc failed\n", __func__);
+ return rc;
+ }
+
rc = crypto_shash_setkey(server->secmech.hmacsha256,
server->session_key.response, SMB2_NTLMV2_SESSKEY_SIZE);
if (rc) {
@@ -61,7 +138,7 @@ smb2_calc_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server)
rc = crypto_shash_init(&server->secmech.sdeschmacsha256->shash);
if (rc) {
- cifs_dbg(VFS, "%s: Could not init md5\n", __func__);
+ cifs_dbg(VFS, "%s: Could not init sha256", __func__);
return rc;
}
@@ -129,6 +206,12 @@ generate_smb3signingkey(struct TCP_Server_Info *server)
memset(prfhash, 0x0, SMB2_HMACSHA256_SIZE);
memset(server->smb3signingkey, 0x0, SMB3_SIGNKEY_SIZE);
+ rc = smb3_crypto_shash_allocate(server);
+ if (rc) {
+ cifs_dbg(VFS, "%s: crypto alloc failed\n", __func__);
+ goto smb3signkey_ret;
+ }
+
rc = crypto_shash_setkey(server->secmech.hmacsha256,
server->session_key.response, SMB2_NTLMV2_SESSKEY_SIZE);
if (rc) {
@@ -210,6 +293,11 @@ smb3_calc_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server)
return rc;
}
+ /*
+ * we already allocate sdesccmacaes when we init smb3 signing key,
+ * so unlike smb2 case we do not have to check here if secmech are
+ * initialized
+ */
rc = crypto_shash_init(&server->secmech.sdesccmacaes->shash);
if (rc) {
cifs_dbg(VFS, "%s: Could not init cmac aes\n", __func__);
generated by cgit v1.2.3 (git 2.0.4) at 2024-09-20 01:42:05 +0000