Commit fad4161b authored by Hyunchul Lee's avatar Hyunchul Lee Committed by Namjae Jeon
Browse files

cifsd: decoding gss token using lib/asn1_decoder.c 



Decode gss token of SMB2_SESSSION_SETUP using
lib/asn1_decoder.c

Signed-off-by: default avatarHyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: default avatarNamjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: default avatarSteve French <stfrench@microsoft.com>
parent bcd62a36

fs/cifsd/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ config SMB_SERVER 
	select CRYPTO_AEAD2

	select CRYPTO_CCM

	select CRYPTO_GCM

	select ASN1

	default n

	help

	  Choose Y here if you want to allow SMB3 compliant clients

fs/cifsd/Makefile

+2 −1
Original line number Diff line number Diff line
@@ -9,5 +9,6 @@ ksmbd-y := unicode.o auth.o vfs.o vfs_cache.o server.o buffer_pool.o \ 
		mgmt/ksmbd_ida.o mgmt/user_config.o mgmt/share_config.o \

		mgmt/tree_connect.o mgmt/user_session.o smb_common.o \

		transport_tcp.o transport_ipc.o smbacl.o smb2pdu.o \

		smb2ops.o smb2misc.o asn1.o ndr.o

		smb2ops.o smb2misc.o spnego_negtokeninit.asn1.o \

		spnego_negtokentarg.asn1.o asn1.o ndr.o

ksmbd-$(CONFIG_SMB_SERVER_SMBDIRECT) += transport_rdma.o

fs/cifsd/asn1.c

+132 −482
Original line number Diff line number Diff line
@@ -11,61 +11,15 @@ 
#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"



/*****************************************************************************

 *

 * Basic ASN.1 decoding routines (gxsnmp author Dirk Wisse)

 *

 *****************************************************************************/



/* Class */

#define ASN1_UNI	0	/* Universal */

#define ASN1_APL	1	/* Application */

#define ASN1_CTX	2	/* Context */

#define ASN1_PRV	3	/* Private */



/* Tag */

#define ASN1_EOC	0	/* End Of Contents or N/A */

#define ASN1_BOL	1	/* Boolean */

#define ASN1_INT	2	/* Integer */

#define ASN1_BTS	3	/* Bit String */

#define ASN1_OTS	4	/* Octet String */

#define ASN1_NUL	5	/* Null */

#define ASN1_OJI	6	/* Object Identifier  */

#define ASN1_OJD	7	/* Object Description */

#define ASN1_EXT	8	/* External */

#define ASN1_ENUM	10	/* Enumerated */

#define ASN1_SEQ	16	/* Sequence */

#define ASN1_SET	17	/* Set */

#define ASN1_NUMSTR	18	/* Numerical String */

#define ASN1_PRNSTR	19	/* Printable String */

#define ASN1_TEXSTR	20	/* Teletext String */

#define ASN1_VIDSTR	21	/* Video String */

#define ASN1_IA5STR	22	/* IA5 String */

#define ASN1_UNITIM	23	/* Universal Time */

#define ASN1_GENTIM	24	/* General Time */

#define ASN1_GRASTR	25	/* Graphical String */

#define ASN1_VISSTR	26	/* Visible String */

#define ASN1_GENSTR	27	/* General String */



/* Primitive / Constructed methods*/

#define ASN1_PRI	0	/* Primitive */

#define ASN1_CON	1	/* Constructed */



/*

 * Error codes.

 */

#define ASN1_ERR_NOERROR		0

#define ASN1_ERR_DEC_EMPTY		2

#define ASN1_ERR_DEC_EOC_MISMATCH	3

#define ASN1_ERR_DEC_LENGTH_MISMATCH	4

#define ASN1_ERR_DEC_BADVALUE		5

#include "spnego_negtokeninit.asn1.h"

#include "spnego_negtokentarg.asn1.h"



#define SPNEGO_OID_LEN 7

#define NTLMSSP_OID_LEN  10
@@ -81,212 +35,49 @@ static unsigned long MSKRB5_OID[7] = { 1, 2, 840, 48018, 1, 2, 2 }; 
static char NTLMSSP_OID_STR[NTLMSSP_OID_LEN] = { 0x2b, 0x06, 0x01, 0x04, 0x01,

	0x82, 0x37, 0x02, 0x02, 0x0a };



/*

 * ASN.1 context.

 */

struct asn1_ctx {

	int error;		/* Error condition */

	unsigned char *pointer;	/* Octet just to be decoded */

	unsigned char *begin;	/* First octet */

	unsigned char *end;	/* Octet after last octet */

};



/*

 * Octet string (not null terminated)

 */

struct asn1_octstr {

	unsigned char *data;

	unsigned int len;

};



static void

asn1_open(struct asn1_ctx *ctx, unsigned char *buf, unsigned int len)

{

	ctx->begin = buf;

	ctx->end = buf + len;

	ctx->pointer = buf;

	ctx->error = ASN1_ERR_NOERROR;

}



static unsigned char

asn1_octet_decode(struct asn1_ctx *ctx, unsigned char *ch)

{

	if (ctx->pointer >= ctx->end) {

		ctx->error = ASN1_ERR_DEC_EMPTY;

		return 0;

	}

	*ch = *(ctx->pointer)++;

	return 1;

}



static unsigned char

asn1_tag_decode(struct asn1_ctx *ctx, unsigned int *tag)

{

	unsigned char ch;



	*tag = 0;



	do {

		if (!asn1_octet_decode(ctx, &ch))

			return 0;

		*tag <<= 7;

		*tag |= ch & 0x7F;

	} while ((ch & 0x80) == 0x80);

	return 1;

}



static unsigned char

asn1_id_decode(struct asn1_ctx *ctx,

	       unsigned int *cls, unsigned int *con, unsigned int *tag)

{

	unsigned char ch;



	if (!asn1_octet_decode(ctx, &ch))

		return 0;



	*cls = (ch & 0xC0) >> 6;

	*con = (ch & 0x20) >> 5;

	*tag = (ch & 0x1F);



	if (*tag == 0x1F) {

		if (!asn1_tag_decode(ctx, tag))

			return 0;

	}

	return 1;

}



static unsigned char

asn1_length_decode(struct asn1_ctx *ctx, unsigned int *def, unsigned int *len)

{

	unsigned char ch, cnt;



	if (!asn1_octet_decode(ctx, &ch))

		return 0;



	if (ch == 0x80)

		*def = 0;

	else {

		*def = 1;



		if (ch < 0x80)

			*len = ch;

		else {

			cnt = (unsigned char) (ch & 0x7F);

			*len = 0;



			while (cnt > 0) {

				if (!asn1_octet_decode(ctx, &ch))

					return 0;

				*len <<= 8;

				*len |= ch;

				cnt--;

			}

		}

	}



	/* don't trust len bigger than ctx buffer */

	if (*len > ctx->end - ctx->pointer)

		return 0;



	return 1;

}



static unsigned char

asn1_header_decode(struct asn1_ctx *ctx,

		   unsigned char **eoc,

		   unsigned int *cls, unsigned int *con, unsigned int *tag)

{

	unsigned int def = 0;

	unsigned int len = 0;



	if (!asn1_id_decode(ctx, cls, con, tag))

		return 0;



	if (!asn1_length_decode(ctx, &def, &len))

		return 0;



	/* primitive shall be definite, indefinite shall be constructed */

	if (*con == ASN1_PRI && !def)

		return 0;



	if (def)

		*eoc = ctx->pointer + len;

	else

		*eoc = NULL;

	return 1;

}



static unsigned char

asn1_eoc_decode(struct asn1_ctx *ctx, unsigned char *eoc)

{

	unsigned char ch;



	if (!eoc) {

		if (!asn1_octet_decode(ctx, &ch))

			return 0;



		if (ch != 0x00) {

			ctx->error = ASN1_ERR_DEC_EOC_MISMATCH;

			return 0;

		}



		if (!asn1_octet_decode(ctx, &ch))

			return 0;



		if (ch != 0x00) {

			ctx->error = ASN1_ERR_DEC_EOC_MISMATCH;

			return 0;

		}

	} else {

		if (ctx->pointer != eoc) {

			ctx->error = ASN1_ERR_DEC_LENGTH_MISMATCH;

			return 0;

		}

	}

	return 1;

}



static unsigned char

asn1_subid_decode(struct asn1_ctx *ctx, unsigned long *subid)

static bool

asn1_subid_decode(const unsigned char **begin, const unsigned char *end,

		unsigned long *subid)

{

	const unsigned char *ptr = *begin;

	unsigned char ch;



	*subid = 0;



	do {

		if (!asn1_octet_decode(ctx, &ch))

			return 0;

		if (ptr >= end)

			return false;



		ch = *ptr++;

		*subid <<= 7;

		*subid |= ch & 0x7F;

	} while ((ch & 0x80) == 0x80);

	return 1;



	*begin = ptr;

	return true;

}



static int

asn1_oid_decode(struct asn1_ctx *ctx,

		unsigned char *eoc, unsigned long **oid, unsigned int *len)

static bool asn1_oid_decode(const unsigned char *value, size_t vlen,

		unsigned long **oid, size_t *oidlen)

{

	unsigned long subid;

	unsigned int size;

	const unsigned char *iptr = value, *end = value + vlen;

	unsigned long *optr;

	unsigned long subid;



	size = eoc - ctx->pointer + 1;

	vlen += 1;

	if (vlen < 2 || vlen > UINT_MAX/sizeof(unsigned long))

		return false;



	/* first subid actually encodes first two subids */

	if (size < 2 || size > UINT_MAX/sizeof(unsigned long))

		return 0;



	*oid = kmalloc(size * sizeof(unsigned long), GFP_KERNEL);

	*oid = kmalloc(vlen * sizeof(unsigned long), GFP_KERNEL);

	if (!*oid)

		return 0;

		return false;



	optr = *oid;



	if (!asn1_subid_decode(ctx, &subid)) {

	if (!asn1_subid_decode(&iptr, end, &subid)) {

		kfree(*oid);

		*oid = NULL;

		return 0;

		return false;

	}



	if (subid < 40) {
@@ -300,285 +91,55 @@ asn1_oid_decode(struct asn1_ctx *ctx, 
		optr[1] = subid - 80;

	}



	*len = 2;

	*oidlen = 2;

	optr += 2;



	while (ctx->pointer < eoc) {

		if (++(*len) > size) {

			ctx->error = ASN1_ERR_DEC_BADVALUE;

	while (iptr < end) {

		if (++(*oidlen) > vlen) {

			kfree(*oid);

			*oid = NULL;

			return 0;

			return false;

		}



		if (!asn1_subid_decode(ctx, optr++)) {

		if (!asn1_subid_decode(&iptr, end, optr++)) {

			kfree(*oid);

			*oid = NULL;

			return 0;

			return false;

		}

	}

	return 1;

	return true;

}



static int

compare_oid(unsigned long *oid1, unsigned int oid1len,

static bool

oid_eq(unsigned long *oid1, unsigned int oid1len,

		unsigned long *oid2, unsigned int oid2len)

{

	unsigned int i;



	if (oid1len != oid2len)

		return 0;

		return false;



	for (i = 0; i < oid1len; i++) {

		if (oid1[i] != oid2[i])

			return 0;

			return false;

	}

	return 1;

	return true;

}



/* BB check for endian conversion issues here */



int

ksmbd_decode_negTokenInit(unsigned char *security_blob, int length,

		struct ksmbd_conn *conn)

{

	struct asn1_ctx ctx;

	unsigned char *end;

	unsigned char *sequence_end;

	unsigned long *oid = NULL;

	unsigned int cls, con, tag, oidlen, rc, mechTokenlen;

	unsigned int mech_type;



	ksmbd_debug(AUTH, "Received SecBlob: length %d\n", length);



	asn1_open(&ctx, security_blob, length);



	/* GSSAPI header */

	if (asn1_header_decode(&ctx, &end, &cls, &con, &tag) == 0) {

		ksmbd_debug(AUTH, "Error decoding negTokenInit header\n");

		return 0;

	} else if ((cls != ASN1_APL) || (con != ASN1_CON)

		   || (tag != ASN1_EOC)) {

		ksmbd_debug(AUTH, "cls = %d con = %d tag = %d\n", cls, con,

			tag);

		return 0;

	}



	/* Check for SPNEGO OID -- remember to free obj->oid */

	rc = asn1_header_decode(&ctx, &end, &cls, &con, &tag);

	if (rc) {

		if ((tag == ASN1_OJI) && (con == ASN1_PRI) &&

		    (cls == ASN1_UNI)) {

			rc = asn1_oid_decode(&ctx, end, &oid, &oidlen);

			if (rc) {

				rc = compare_oid(oid, oidlen, SPNEGO_OID,

						 SPNEGO_OID_LEN);

				kfree(oid);

			}

		} else

			rc = 0;

	}



	/* SPNEGO OID not present or garbled -- bail out */

	if (!rc) {

		ksmbd_debug(AUTH, "Error decoding negTokenInit header\n");

		return 0;

	}



	/* SPNEGO */

	if (asn1_header_decode(&ctx, &end, &cls, &con, &tag) == 0) {

		ksmbd_debug(AUTH, "Error decoding negTokenInit\n");

		return 0;

	} else if ((cls != ASN1_CTX) || (con != ASN1_CON)

		   || (tag != ASN1_EOC)) {

		ksmbd_debug(AUTH,

			"cls = %d con = %d tag = %d end = %p (%d) exit 0\n",

			cls, con, tag, end, *end);

		return 0;

	}



	/* negTokenInit */

	if (asn1_header_decode(&ctx, &end, &cls, &con, &tag) == 0) {

		ksmbd_debug(AUTH, "Error decoding negTokenInit\n");

		return 0;

	} else if ((cls != ASN1_UNI) || (con != ASN1_CON)

		   || (tag != ASN1_SEQ)) {

		ksmbd_debug(AUTH,

			"cls = %d con = %d tag = %d end = %p (%d) exit 1\n",

			cls, con, tag, end, *end);

		return 0;

	}



	/* sequence */

	if (asn1_header_decode(&ctx, &end, &cls, &con, &tag) == 0) {

		ksmbd_debug(AUTH, "Error decoding 2nd part of negTokenInit\n");

		return 0;

	} else if ((cls != ASN1_CTX) || (con != ASN1_CON)

		   || (tag != ASN1_EOC)) {

		ksmbd_debug(AUTH,

			"cls = %d con = %d tag = %d end = %p (%d) exit 0\n",

			cls, con, tag, end, *end);

		return 0;

	}



	/* sequence of */

	if (asn1_header_decode

	    (&ctx, &sequence_end, &cls, &con, &tag) == 0) {

		ksmbd_debug(AUTH, "Error decoding 2nd part of negTokenInit\n");

		return 0;

	} else if ((cls != ASN1_UNI) || (con != ASN1_CON)

		   || (tag != ASN1_SEQ)) {

		ksmbd_debug(AUTH,

			"cls = %d con = %d tag = %d end = %p (%d) exit 1\n",

			cls, con, tag, end, *end);

		return 0;

	}



	/* list of security mechanisms */

	while (!asn1_eoc_decode(&ctx, sequence_end)) {

		rc = asn1_header_decode(&ctx, &end, &cls, &con, &tag);

		if (!rc) {

			ksmbd_debug(AUTH,

				"Error decoding negTokenInit hdr exit2\n");

			return 0;

		}

		if ((tag == ASN1_OJI) && (con == ASN1_PRI)) {

			if (asn1_oid_decode(&ctx, end, &oid, &oidlen)) {

				if (compare_oid(oid, oidlen, MSKRB5_OID,

						MSKRB5_OID_LEN))

					mech_type = KSMBD_AUTH_MSKRB5;

				else if (compare_oid(oid, oidlen, KRB5U2U_OID,

						     KRB5U2U_OID_LEN))

					mech_type = KSMBD_AUTH_KRB5U2U;

				else if (compare_oid(oid, oidlen, KRB5_OID,

						     KRB5_OID_LEN))

					mech_type = KSMBD_AUTH_KRB5;

				else if (compare_oid(oid, oidlen, NTLMSSP_OID,

						     NTLMSSP_OID_LEN))

					mech_type = KSMBD_AUTH_NTLMSSP;

				else {

					kfree(oid);

					continue;

				}



				conn->auth_mechs |= mech_type;

				if (conn->preferred_auth_mech == 0)

					conn->preferred_auth_mech = mech_type;

				kfree(oid);

			}

		} else {

			ksmbd_debug(AUTH,

				"Should be an oid what is going on?\n");

		}

	}



	/* sequence */

	if (asn1_header_decode(&ctx, &end, &cls, &con, &tag) == 0) {

		ksmbd_debug(AUTH, "Error decoding 2nd part of negTokenInit\n");

		return 0;

	} else if ((cls != ASN1_CTX) || (con != ASN1_CON)

		   || (tag != ASN1_INT)) {

		ksmbd_debug(AUTH,

			"cls = %d con = %d tag = %d end = %p (%d) exit 0\n",

			cls, con, tag, end, *end);

		return 0;

	}



	/* sequence of */

	if (asn1_header_decode(&ctx, &end, &cls, &con, &tag) == 0) {

		ksmbd_debug(AUTH, "Error decoding 2nd part of negTokenInit\n");

		return 0;

	} else if ((cls != ASN1_UNI) || (con != ASN1_PRI)

		   || (tag != ASN1_OTS)) {

		ksmbd_debug(AUTH,

			"cls = %d con = %d tag = %d end = %p (%d) exit 0\n",

			cls, con, tag, end, *end);

		return 0;

	}



	mechTokenlen = ctx.end - ctx.pointer;

	conn->mechToken = kmalloc(mechTokenlen + 1, GFP_KERNEL);

	if (!conn->mechToken) {

		ksmbd_err("memory allocation error\n");

		return 0;

	}



	memcpy(conn->mechToken, ctx.pointer, mechTokenlen);

	conn->mechToken[mechTokenlen] = '\0';



	return 1;

	return asn1_ber_decoder(&spnego_negtokeninit_decoder, conn,

				security_blob, length);

}



int

ksmbd_decode_negTokenTarg(unsigned char *security_blob, int length,

		struct ksmbd_conn *conn)

{

	struct asn1_ctx ctx;

	unsigned char *end;

	unsigned int cls, con, tag, mechTokenlen;



	ksmbd_debug(AUTH, "Received Auth SecBlob: length %d\n", length);



	asn1_open(&ctx, security_blob, length);



	/* GSSAPI header */

	if (asn1_header_decode(&ctx, &end, &cls, &con, &tag) == 0) {

		ksmbd_debug(AUTH, "Error decoding negTokenInit header\n");

		return 0;

	} else if ((cls != ASN1_CTX) || (con != ASN1_CON)

		   || (tag != ASN1_BOL)) {

		ksmbd_debug(AUTH, "cls = %d con = %d tag = %d\n", cls, con,

			tag);

		return 0;

	}



	/* SPNEGO */

	if (asn1_header_decode(&ctx, &end, &cls, &con, &tag) == 0) {

		ksmbd_debug(AUTH, "Error decoding negTokenInit\n");

		return 0;

	} else if ((cls != ASN1_UNI) || (con != ASN1_CON)

		   || (tag != ASN1_SEQ)) {

		ksmbd_debug(AUTH,

			"cls = %d con = %d tag = %d end = %p (%d) exit 0\n",

			cls, con, tag, end, *end);

		return 0;

	}



	/* negTokenTarg */

	if (asn1_header_decode(&ctx, &end, &cls, &con, &tag) == 0) {

		ksmbd_debug(AUTH, "Error decoding negTokenInit\n");

		return 0;

	} else if ((cls != ASN1_CTX) || (con != ASN1_CON)

		   || (tag != ASN1_INT)) {

		ksmbd_debug(AUTH,

			"cls = %d con = %d tag = %d end = %p (%d) exit 1\n",

			cls, con, tag, end, *end);

		return 0;

	}



	/* negTokenTarg */

	if (asn1_header_decode(&ctx, &end, &cls, &con, &tag) == 0) {

		ksmbd_debug(AUTH, "Error decoding negTokenInit\n");

		return 0;

	} else if ((cls != ASN1_UNI) || (con != ASN1_PRI)

		   || (tag != ASN1_OTS)) {

		ksmbd_debug(AUTH,

			"cls = %d con = %d tag = %d end = %p (%d) exit 1\n",

			cls, con, tag, end, *end);

		return 0;

	}



	mechTokenlen = ctx.end - ctx.pointer;

	conn->mechToken = kmalloc(mechTokenlen + 1, GFP_KERNEL);

	if (!conn->mechToken) {

		ksmbd_err("memory allocation error\n");

		return 0;

	}



	memcpy(conn->mechToken, ctx.pointer, mechTokenlen);

	conn->mechToken[mechTokenlen] = '\0';



	return 1;

	return asn1_ber_decoder(&spnego_negtokentarg_decoder, conn,

				security_blob, length);

}



static int compute_asn_hdr_len_bytes(int len)
@@ -700,3 +261,92 @@ int build_spnego_ntlmssp_auth_blob(unsigned char **pbuffer, u16 *buflen, 
	*buflen = total_len;

	return 0;

}



int gssapi_this_mech(void *context, size_t hdrlen,

		unsigned char tag, const void *value, size_t vlen)

{

	unsigned long *oid;

	size_t oidlen;

	int err = 0;



	if (!asn1_oid_decode(value, vlen, &oid, &oidlen)) {

		err = -EBADMSG;

		goto out;

	}



	if (!oid_eq(oid, oidlen, SPNEGO_OID, SPNEGO_OID_LEN))

		err = -EBADMSG;

	kfree(oid);

out:

	if (err) {

		char buf[50];



		sprint_oid(value, vlen, buf, sizeof(buf));

		ksmbd_debug(AUTH, "Unexpected OID: %s\n", buf);

	}

	return err;

}



int neg_token_init_mech_type(void *context, size_t hdrlen,

		unsigned char tag, const void *value, size_t vlen)

{

	struct ksmbd_conn *conn = context;

	unsigned long *oid;

	size_t oidlen;

	int mech_type;



	if (!asn1_oid_decode(value, vlen, &oid, &oidlen)) {

		char buf[50];



		sprint_oid(value, vlen, buf, sizeof(buf));

		ksmbd_debug(AUTH, "Unexpected OID: %s\n", buf);

		return -EBADMSG;

	}



	if (oid_eq(oid, oidlen, NTLMSSP_OID, NTLMSSP_OID_LEN))

		mech_type = KSMBD_AUTH_NTLMSSP;

	else if (oid_eq(oid, oidlen, MSKRB5_OID, MSKRB5_OID_LEN))

		mech_type = KSMBD_AUTH_MSKRB5;

	else if (oid_eq(oid, oidlen, KRB5_OID, KRB5_OID_LEN))

		mech_type = KSMBD_AUTH_KRB5;

	else if (oid_eq(oid, oidlen, KRB5U2U_OID, KRB5U2U_OID_LEN))

		mech_type = KSMBD_AUTH_KRB5U2U;

	else

		goto out;



	conn->auth_mechs |= mech_type;

	if (conn->preferred_auth_mech == 0)

		conn->preferred_auth_mech = mech_type;



out:

	kfree(oid);

	return 0;

}



int neg_token_init_mech_token(void *context, size_t hdrlen,

		unsigned char tag, const void *value, size_t vlen)

{

	struct ksmbd_conn *conn = context;



	conn->mechToken = kmalloc(vlen + 1, GFP_KERNEL);

	if (!conn->mechToken)

		return -ENOMEM;



	memcpy(conn->mechToken, value, vlen);

	conn->mechToken[vlen] = '\0';

	return 0;

}



int neg_token_targ_resp_token(void *context, size_t hdrlen,

		unsigned char tag, const void *value, size_t vlen)

{

	struct ksmbd_conn *conn = context;



	conn->mechToken = kmalloc(vlen + 1, GFP_KERNEL);

	if (!conn->mechToken)

		return -ENOMEM;



	memcpy(conn->mechToken, value, vlen);

	conn->mechToken[vlen] = '\0';

	return 0;

}

fs/cifsd/smb2pdu.c

+2 −2
Original line number Diff line number Diff line
@@ -1194,8 +1194,8 @@ static int decode_negotiation_token(struct ksmbd_work *work, 
	req = work->request_buf;

	sz = le16_to_cpu(req->SecurityBufferLength);



	if (!ksmbd_decode_negTokenInit((char *)negblob, sz, conn)) {

		if (!ksmbd_decode_negTokenTarg((char *)negblob, sz, conn)) {

	if (ksmbd_decode_negTokenInit((char *)negblob, sz, conn)) {

		if (ksmbd_decode_negTokenTarg((char *)negblob, sz, conn)) {

			conn->auth_mechs |= KSMBD_AUTH_NTLMSSP;

			conn->preferred_auth_mech = KSMBD_AUTH_NTLMSSP;

			conn->use_spnego = false;

fs/cifsd/spnego_negtokeninit.asn1

0 → 100644
+43 −0
Original line number Diff line number Diff line 
GSSAPI ::=

	[APPLICATION 0] IMPLICIT SEQUENCE {

		thisMech

			OBJECT IDENTIFIER ({gssapi_this_mech}),

		negotiationToken

			NegotiationToken

	}



MechType ::= OBJECT IDENTIFIER ({neg_token_init_mech_type})



MechTypeList ::= SEQUENCE OF MechType



NegTokenInit ::=

	SEQUENCE {

		mechTypes

			[0] MechTypeList,

		reqFlags

			[1] BIT STRING OPTIONAL,

		mechToken

			[2] OCTET STRING OPTIONAL ({neg_token_init_mech_token}),

		mechListMIC

			[3] OCTET STRING OPTIONAL

	}



NegTokenTarg ::=

	SEQUENCE {

		negResult

			[0] ENUMERATED OPTIONAL,

		supportedMech

			[1] OBJECT IDENTIFIER OPTIONAL,

		responseToken

			[2] OCTET STRING OPTIONAL ({neg_token_targ_resp_token}),

		mechListMIC

			[3] OCTET STRING OPTIONAL

	}



NegotiationToken ::=

	CHOICE {

		negTokenInit

			[0] NegTokenInit,

		negTokenTarg

			[1] ANY

	}