linux/fs/smb/server/asn1.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * The ASB.1/BER parsing code is derived from ip_nat_snmp_basic.c which was in
 * turn derived from the gxsnmp package by Gregory McLean & Jochen Friedrich
 *
 * Copyright (c) 2000 RP Internet (www.rpi.net.au).
 */

#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/oid_registry.h>

#include "glob.h"

#include "asn1.h"
#include "connection.h"
#include "auth.h"
#include "ksmbd_spnego_negtokeninit.asn1.h"
#include "ksmbd_spnego_negtokentarg.asn1.h"

#define NTLMSSP_OID_LEN …

static char NTLMSSP_OID_STR[NTLMSSP_OID_LEN] = …;

int
ksmbd_decode_negTokenInit(unsigned char *security_blob, int length,
			  struct ksmbd_conn *conn)
{ … }

int
ksmbd_decode_negTokenTarg(unsigned char *security_blob, int length,
			  struct ksmbd_conn *conn)
{ … }

static int compute_asn_hdr_len_bytes(int len)
{ … }

static void encode_asn_tag(char *buf, unsigned int *ofs, char tag, char seq,
			   int length)
{ … }

int build_spnego_ntlmssp_neg_blob(unsigned char **pbuffer, u16 *buflen,
				  char *ntlm_blob, int ntlm_blob_len)
{ … }

int build_spnego_ntlmssp_auth_blob(unsigned char **pbuffer, u16 *buflen,
				   int neg_result)
{ … }

int ksmbd_gssapi_this_mech(void *context, size_t hdrlen, unsigned char tag,
			   const void *value, size_t vlen)
{ … }

int ksmbd_neg_token_init_mech_type(void *context, size_t hdrlen,
				   unsigned char tag, const void *value,
				   size_t vlen)
{ … }

static int ksmbd_neg_token_alloc(void *context, size_t hdrlen,
				 unsigned char tag, const void *value,
				 size_t vlen)
{ … }

int ksmbd_neg_token_init_mech_token(void *context, size_t hdrlen,
				    unsigned char tag, const void *value,
				    size_t vlen)
{ … }

int ksmbd_neg_token_targ_resp_token(void *context, size_t hdrlen,
				    unsigned char tag, const void *value,
				    size_t vlen)
{ … }