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cifs: send workstation name during ntlmssp session setup
During the ntlmssp session setup (authenticate phases) send the client workstation info. This can make debugging easier on servers. Signed-off-by: Shyam Prasad N <sprasad@microsoft.com> Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz> Reviewed-by: Enzo Matsumiya <ematsumiya@suse.de> Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Shyam Prasad N
Steve French
parent
c9f1c19cf7
commit
49bd49f983
@ -15,6 +15,7 @@
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#include <linux/slab.h>
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#include <linux/mempool.h>
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#include <linux/workqueue.h>
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#include <linux/utsname.h>
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#include "cifs_fs_sb.h"
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#include "cifsacl.h"
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#include <crypto/internal/hash.h>
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@ -99,6 +100,8 @@
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#define XATTR_DOS_ATTRIB "user.DOSATTRIB"
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#endif
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#define CIFS_MAX_WORKSTATION_LEN (__NEW_UTS_LEN + 1) /* reasonable max for client */
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/*
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* CIFS vfs client Status information (based on what we know.)
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*/
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@ -909,6 +912,7 @@ struct cifs_ses {
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and after mount option parsing we fill it */
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char *domainName;
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char *password;
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char *workstation_name;
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struct session_key auth_key;
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struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
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enum securityEnum sectype; /* what security flavor was specified? */
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@ -1948,6 +1948,12 @@ cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb3_fs_context *ctx)
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if (!ses->domainName)
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goto get_ses_fail;
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}
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if (ctx->workstation_name) {
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ses->workstation_name = kstrdup(ctx->workstation_name,
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GFP_KERNEL);
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if (!ses->workstation_name)
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goto get_ses_fail;
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}
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if (ctx->domainauto)
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ses->domainAuto = ctx->domainauto;
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ses->cred_uid = ctx->cred_uid;
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@ -309,6 +309,7 @@ smb3_fs_context_dup(struct smb3_fs_context *new_ctx, struct smb3_fs_context *ctx
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new_ctx->username = NULL;
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new_ctx->password = NULL;
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new_ctx->domainname = NULL;
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new_ctx->workstation_name = NULL;
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new_ctx->UNC = NULL;
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new_ctx->source = NULL;
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new_ctx->iocharset = NULL;
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@ -323,6 +324,7 @@ smb3_fs_context_dup(struct smb3_fs_context *new_ctx, struct smb3_fs_context *ctx
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DUP_CTX_STR(UNC);
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DUP_CTX_STR(source);
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DUP_CTX_STR(domainname);
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DUP_CTX_STR(workstation_name);
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DUP_CTX_STR(nodename);
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DUP_CTX_STR(iocharset);
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@ -720,6 +722,11 @@ static int smb3_verify_reconfigure_ctx(struct fs_context *fc,
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cifs_errorf(fc, "can not change domainname during remount\n");
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return -EINVAL;
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}
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if (new_ctx->workstation_name &&
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(!old_ctx->workstation_name || strcmp(new_ctx->workstation_name, old_ctx->workstation_name))) {
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cifs_errorf(fc, "can not change workstation_name during remount\n");
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return -EINVAL;
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}
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if (new_ctx->nodename &&
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(!old_ctx->nodename || strcmp(new_ctx->nodename, old_ctx->nodename))) {
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cifs_errorf(fc, "can not change nodename during remount\n");
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@ -753,7 +760,8 @@ static int smb3_reconfigure(struct fs_context *fc)
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return rc;
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/*
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* We can not change UNC/username/password/domainname/nodename/iocharset
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* We can not change UNC/username/password/domainname/
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* workstation_name/nodename/iocharset
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* during reconnect so ignore what we have in the new context and
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* just use what we already have in cifs_sb->ctx.
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*/
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@ -762,6 +770,7 @@ static int smb3_reconfigure(struct fs_context *fc)
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STEAL_STRING(cifs_sb, ctx, username);
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STEAL_STRING(cifs_sb, ctx, password);
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STEAL_STRING(cifs_sb, ctx, domainname);
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STEAL_STRING(cifs_sb, ctx, workstation_name);
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STEAL_STRING(cifs_sb, ctx, nodename);
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STEAL_STRING(cifs_sb, ctx, iocharset);
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@ -1414,13 +1423,22 @@ static int smb3_fs_context_parse_param(struct fs_context *fc,
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int smb3_init_fs_context(struct fs_context *fc)
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{
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int rc;
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struct smb3_fs_context *ctx;
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char *nodename = utsname()->nodename;
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int i;
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ctx = kzalloc(sizeof(struct smb3_fs_context), GFP_KERNEL);
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if (unlikely(!ctx))
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return -ENOMEM;
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if (unlikely(!ctx)) {
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rc = -ENOMEM;
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goto err_exit;
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}
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ctx->workstation_name = kstrdup(nodename, GFP_KERNEL);
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if (unlikely(!ctx->workstation_name)) {
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rc = -ENOMEM;
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goto err_exit;
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}
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/*
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* does not have to be perfect mapping since field is
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@ -1493,6 +1511,14 @@ int smb3_init_fs_context(struct fs_context *fc)
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fc->fs_private = ctx;
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fc->ops = &smb3_fs_context_ops;
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return 0;
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err_exit:
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if (ctx) {
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kfree(ctx->workstation_name);
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kfree(ctx);
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}
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return rc;
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}
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void
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@ -1518,6 +1544,8 @@ smb3_cleanup_fs_context_contents(struct smb3_fs_context *ctx)
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ctx->source = NULL;
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kfree(ctx->domainname);
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ctx->domainname = NULL;
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kfree(ctx->workstation_name);
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ctx->workstation_name = NULL;
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kfree(ctx->nodename);
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ctx->nodename = NULL;
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kfree(ctx->iocharset);
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@ -170,6 +170,7 @@ struct smb3_fs_context {
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char *server_hostname;
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char *UNC;
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char *nodename;
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char *workstation_name;
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char *iocharset; /* local code page for mapping to and from Unicode */
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char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */
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char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */
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@ -94,6 +94,7 @@ sesInfoFree(struct cifs_ses *buf_to_free)
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kfree_sensitive(buf_to_free->password);
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kfree(buf_to_free->user_name);
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kfree(buf_to_free->domainName);
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kfree(buf_to_free->workstation_name);
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kfree_sensitive(buf_to_free->auth_key.response);
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kfree(buf_to_free->iface_list);
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kfree_sensitive(buf_to_free);
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@ -119,7 +119,9 @@ typedef struct _AUTHENTICATE_MESSAGE {
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*/
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int decode_ntlmssp_challenge(char *bcc_ptr, int blob_len, struct cifs_ses *ses);
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void build_ntlmssp_negotiate_blob(unsigned char *pbuffer, struct cifs_ses *ses);
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int build_ntlmssp_negotiate_blob(unsigned char **pbuffer, u16 *buflen,
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struct cifs_ses *ses,
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const struct nls_table *nls_cp);
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int build_ntlmssp_auth_blob(unsigned char **pbuffer, u16 *buflen,
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struct cifs_ses *ses,
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const struct nls_table *nls_cp);
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188
fs/cifs/sess.c
188
fs/cifs/sess.c
@ -599,18 +599,85 @@ int decode_ntlmssp_challenge(char *bcc_ptr, int blob_len,
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return 0;
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}
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static int size_of_ntlmssp_blob(struct cifs_ses *ses, int base_size)
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{
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int sz = base_size + ses->auth_key.len
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- CIFS_SESS_KEY_SIZE + CIFS_CPHTXT_SIZE + 2;
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if (ses->domainName)
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sz += sizeof(__le16) * strnlen(ses->domainName, CIFS_MAX_DOMAINNAME_LEN);
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else
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sz += sizeof(__le16);
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if (ses->user_name)
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sz += sizeof(__le16) * strnlen(ses->user_name, CIFS_MAX_USERNAME_LEN);
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else
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sz += sizeof(__le16);
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sz += sizeof(__le16) * strnlen(ses->workstation_name, CIFS_MAX_WORKSTATION_LEN);
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return sz;
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}
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static inline void cifs_security_buffer_from_str(SECURITY_BUFFER *pbuf,
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char *str_value,
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int str_length,
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unsigned char *pstart,
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unsigned char **pcur,
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const struct nls_table *nls_cp)
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{
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unsigned char *tmp = pstart;
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int len;
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if (!pbuf)
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return;
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if (!pcur)
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pcur = &tmp;
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if (!str_value) {
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pbuf->BufferOffset = cpu_to_le32(*pcur - pstart);
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pbuf->Length = 0;
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pbuf->MaximumLength = 0;
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*pcur += sizeof(__le16);
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} else {
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len = cifs_strtoUTF16((__le16 *)*pcur,
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str_value,
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str_length,
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nls_cp);
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len *= sizeof(__le16);
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pbuf->BufferOffset = cpu_to_le32(*pcur - pstart);
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pbuf->Length = cpu_to_le16(len);
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pbuf->MaximumLength = cpu_to_le16(len);
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*pcur += len;
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}
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}
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/* BB Move to ntlmssp.c eventually */
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/* We do not malloc the blob, it is passed in pbuffer, because
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it is fixed size, and small, making this approach cleaner */
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void build_ntlmssp_negotiate_blob(unsigned char *pbuffer,
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struct cifs_ses *ses)
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int build_ntlmssp_negotiate_blob(unsigned char **pbuffer,
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u16 *buflen,
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struct cifs_ses *ses,
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const struct nls_table *nls_cp)
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{
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int rc = 0;
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struct TCP_Server_Info *server = cifs_ses_server(ses);
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NEGOTIATE_MESSAGE *sec_blob = (NEGOTIATE_MESSAGE *)pbuffer;
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NEGOTIATE_MESSAGE *sec_blob;
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__u32 flags;
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unsigned char *tmp;
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int len;
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memset(pbuffer, 0, sizeof(NEGOTIATE_MESSAGE));
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len = size_of_ntlmssp_blob(ses, sizeof(NEGOTIATE_MESSAGE));
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*pbuffer = kmalloc(len, GFP_KERNEL);
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if (!*pbuffer) {
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rc = -ENOMEM;
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cifs_dbg(VFS, "Error %d during NTLMSSP allocation\n", rc);
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*buflen = 0;
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goto setup_ntlm_neg_ret;
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}
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sec_blob = (NEGOTIATE_MESSAGE *)*pbuffer;
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memset(*pbuffer, 0, sizeof(NEGOTIATE_MESSAGE));
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memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8);
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sec_blob->MessageType = NtLmNegotiate;
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@ -624,34 +691,25 @@ void build_ntlmssp_negotiate_blob(unsigned char *pbuffer,
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if (!server->session_estab || ses->ntlmssp->sesskey_per_smbsess)
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flags |= NTLMSSP_NEGOTIATE_KEY_XCH;
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tmp = *pbuffer + sizeof(NEGOTIATE_MESSAGE);
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sec_blob->NegotiateFlags = cpu_to_le32(flags);
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sec_blob->WorkstationName.BufferOffset = 0;
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sec_blob->WorkstationName.Length = 0;
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sec_blob->WorkstationName.MaximumLength = 0;
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/* these fields should be null in negotiate phase MS-NLMP 3.1.5.1.1 */
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cifs_security_buffer_from_str(&sec_blob->DomainName,
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NULL,
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CIFS_MAX_DOMAINNAME_LEN,
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*pbuffer, &tmp,
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nls_cp);
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/* Domain name is sent on the Challenge not Negotiate NTLMSSP request */
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sec_blob->DomainName.BufferOffset = 0;
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sec_blob->DomainName.Length = 0;
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sec_blob->DomainName.MaximumLength = 0;
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}
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cifs_security_buffer_from_str(&sec_blob->WorkstationName,
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NULL,
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CIFS_MAX_WORKSTATION_LEN,
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*pbuffer, &tmp,
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nls_cp);
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static int size_of_ntlmssp_blob(struct cifs_ses *ses)
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{
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int sz = sizeof(AUTHENTICATE_MESSAGE) + ses->auth_key.len
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- CIFS_SESS_KEY_SIZE + CIFS_CPHTXT_SIZE + 2;
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if (ses->domainName)
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sz += 2 * strnlen(ses->domainName, CIFS_MAX_DOMAINNAME_LEN);
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else
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sz += 2;
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if (ses->user_name)
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sz += 2 * strnlen(ses->user_name, CIFS_MAX_USERNAME_LEN);
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else
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sz += 2;
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return sz;
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*buflen = tmp - *pbuffer;
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setup_ntlm_neg_ret:
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return rc;
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}
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int build_ntlmssp_auth_blob(unsigned char **pbuffer,
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@ -663,6 +721,7 @@ int build_ntlmssp_auth_blob(unsigned char **pbuffer,
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AUTHENTICATE_MESSAGE *sec_blob;
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__u32 flags;
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unsigned char *tmp;
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int len;
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rc = setup_ntlmv2_rsp(ses, nls_cp);
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if (rc) {
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@ -670,7 +729,9 @@ int build_ntlmssp_auth_blob(unsigned char **pbuffer,
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*buflen = 0;
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goto setup_ntlmv2_ret;
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}
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*pbuffer = kmalloc(size_of_ntlmssp_blob(ses), GFP_KERNEL);
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len = size_of_ntlmssp_blob(ses, sizeof(AUTHENTICATE_MESSAGE));
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*pbuffer = kmalloc(len, GFP_KERNEL);
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if (!*pbuffer) {
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rc = -ENOMEM;
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cifs_dbg(VFS, "Error %d during NTLMSSP allocation\n", rc);
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@ -686,7 +747,7 @@ int build_ntlmssp_auth_blob(unsigned char **pbuffer,
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NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_TARGET_INFO |
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NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE |
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NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_EXTENDED_SEC |
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NTLMSSP_NEGOTIATE_SEAL;
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NTLMSSP_NEGOTIATE_SEAL | NTLMSSP_NEGOTIATE_WORKSTATION_SUPPLIED;
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if (ses->server->sign)
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flags |= NTLMSSP_NEGOTIATE_SIGN;
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if (!ses->server->session_estab || ses->ntlmssp->sesskey_per_smbsess)
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@ -719,42 +780,23 @@ int build_ntlmssp_auth_blob(unsigned char **pbuffer,
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sec_blob->NtChallengeResponse.MaximumLength = 0;
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}
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if (ses->domainName == NULL) {
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sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - *pbuffer);
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sec_blob->DomainName.Length = 0;
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sec_blob->DomainName.MaximumLength = 0;
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tmp += 2;
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} else {
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int len;
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len = cifs_strtoUTF16((__le16 *)tmp, ses->domainName,
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CIFS_MAX_DOMAINNAME_LEN, nls_cp);
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len *= 2; /* unicode is 2 bytes each */
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sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - *pbuffer);
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sec_blob->DomainName.Length = cpu_to_le16(len);
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sec_blob->DomainName.MaximumLength = cpu_to_le16(len);
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tmp += len;
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}
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cifs_security_buffer_from_str(&sec_blob->DomainName,
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ses->domainName,
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CIFS_MAX_DOMAINNAME_LEN,
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*pbuffer, &tmp,
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nls_cp);
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if (ses->user_name == NULL) {
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sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - *pbuffer);
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sec_blob->UserName.Length = 0;
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sec_blob->UserName.MaximumLength = 0;
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tmp += 2;
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} else {
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int len;
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len = cifs_strtoUTF16((__le16 *)tmp, ses->user_name,
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CIFS_MAX_USERNAME_LEN, nls_cp);
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len *= 2; /* unicode is 2 bytes each */
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sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - *pbuffer);
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sec_blob->UserName.Length = cpu_to_le16(len);
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sec_blob->UserName.MaximumLength = cpu_to_le16(len);
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tmp += len;
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}
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cifs_security_buffer_from_str(&sec_blob->UserName,
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ses->user_name,
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CIFS_MAX_USERNAME_LEN,
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*pbuffer, &tmp,
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nls_cp);
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sec_blob->WorkstationName.BufferOffset = cpu_to_le32(tmp - *pbuffer);
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sec_blob->WorkstationName.Length = 0;
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sec_blob->WorkstationName.MaximumLength = 0;
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tmp += 2;
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cifs_security_buffer_from_str(&sec_blob->WorkstationName,
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ses->workstation_name,
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CIFS_MAX_WORKSTATION_LEN,
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*pbuffer, &tmp,
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nls_cp);
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if (((ses->ntlmssp->server_flags & NTLMSSP_NEGOTIATE_KEY_XCH) ||
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(ses->ntlmssp->server_flags & NTLMSSP_NEGOTIATE_EXTENDED_SEC))
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@ -1230,6 +1272,7 @@ sess_auth_rawntlmssp_negotiate(struct sess_data *sess_data)
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struct cifs_ses *ses = sess_data->ses;
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__u16 bytes_remaining;
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char *bcc_ptr;
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unsigned char *ntlmsspblob = NULL;
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u16 blob_len;
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cifs_dbg(FYI, "rawntlmssp session setup negotiate phase\n");
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@ -1253,10 +1296,15 @@ sess_auth_rawntlmssp_negotiate(struct sess_data *sess_data)
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pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base;
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/* Build security blob before we assemble the request */
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build_ntlmssp_negotiate_blob(pSMB->req.SecurityBlob, ses);
|
||||
sess_data->iov[1].iov_len = sizeof(NEGOTIATE_MESSAGE);
|
||||
sess_data->iov[1].iov_base = pSMB->req.SecurityBlob;
|
||||
pSMB->req.SecurityBlobLength = cpu_to_le16(sizeof(NEGOTIATE_MESSAGE));
|
||||
rc = build_ntlmssp_negotiate_blob(&ntlmsspblob,
|
||||
&blob_len, ses,
|
||||
sess_data->nls_cp);
|
||||
if (rc)
|
||||
goto out;
|
||||
|
||||
sess_data->iov[1].iov_len = blob_len;
|
||||
sess_data->iov[1].iov_base = ntlmsspblob;
|
||||
pSMB->req.SecurityBlobLength = cpu_to_le16(blob_len);
|
||||
|
||||
rc = _sess_auth_rawntlmssp_assemble_req(sess_data);
|
||||
if (rc)
|
||||
|
||||
@ -1456,7 +1456,7 @@ SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data *sess_data)
|
||||
int rc;
|
||||
struct cifs_ses *ses = sess_data->ses;
|
||||
struct smb2_sess_setup_rsp *rsp = NULL;
|
||||
char *ntlmssp_blob = NULL;
|
||||
unsigned char *ntlmssp_blob = NULL;
|
||||
bool use_spnego = false; /* else use raw ntlmssp */
|
||||
u16 blob_length = 0;
|
||||
|
||||
@ -1475,22 +1475,17 @@ SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data *sess_data)
|
||||
if (rc)
|
||||
goto out_err;
|
||||
|
||||
ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE),
|
||||
GFP_KERNEL);
|
||||
if (ntlmssp_blob == NULL) {
|
||||
rc = -ENOMEM;
|
||||
goto out;
|
||||
}
|
||||
rc = build_ntlmssp_negotiate_blob(&ntlmssp_blob,
|
||||
&blob_length, ses,
|
||||
sess_data->nls_cp);
|
||||
if (rc)
|
||||
goto out_err;
|
||||
|
||||
build_ntlmssp_negotiate_blob(ntlmssp_blob, ses);
|
||||
if (use_spnego) {
|
||||
/* BB eventually need to add this */
|
||||
cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
|
||||
rc = -EOPNOTSUPP;
|
||||
goto out;
|
||||
} else {
|
||||
blob_length = sizeof(struct _NEGOTIATE_MESSAGE);
|
||||
/* with raw NTLMSSP we don't encapsulate in SPNEGO */
|
||||
}
|
||||
sess_data->iov[1].iov_base = ntlmssp_blob;
|
||||
sess_data->iov[1].iov_len = blob_length;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user