Revert "[CIFS] Fix ntlmv2 auth with ntlmssp" (c8e56f1f) · Commits · e / devices / android_kernel_fairphone_FP5

fs/cifs/Kconfig

+0 −2

Original line number	Diff line number	Diff line
		@@ -2,8 +2,6 @@ config CIFS
		tristate "CIFS support (advanced network filesystem, SMBFS successor)"
		depends on INET
		select NLS
		select CRYPTO_MD5
		select CRYPTO_ARC4
		help
		This is the client VFS module for the Common Internet File System
		(CIFS) protocol which is the successor to the Server Message Block

fs/cifs/asn1.c

+3 −3

Original line number	Diff line number	Diff line
		@@ -597,13 +597,13 @@ decode_negTokenInit(unsigned char *security_blob, int length,
		if (compare_oid(oid, oidlen, MSKRB5_OID,
		MSKRB5_OID_LEN))
		server->sec_mskerberos = true;
		if (compare_oid(oid, oidlen, KRB5U2U_OID,
		else if (compare_oid(oid, oidlen, KRB5U2U_OID,
		KRB5U2U_OID_LEN))
		server->sec_kerberosu2u = true;
		if (compare_oid(oid, oidlen, KRB5_OID,
		else if (compare_oid(oid, oidlen, KRB5_OID,
		KRB5_OID_LEN))
		server->sec_kerberos = true;
		if (compare_oid(oid, oidlen, NTLMSSP_OID,
		else if (compare_oid(oid, oidlen, NTLMSSP_OID,
		NTLMSSP_OID_LEN))
		server->sec_ntlmssp = true;

fs/cifs/cifsencrypt.c

+122 −294

Original line number	Diff line number	Diff line
		@@ -27,7 +27,6 @@
		#include "md5.h"
		#include "cifs_unicode.h"
		#include "cifsproto.h"
		#include "ntlmssp.h"
		#include <linux/ctype.h>
		#include <linux/random.h>

		@@ -43,44 +42,21 @@ extern void SMBencrypt(unsigned char passwd, const unsigned char c8,
		unsigned char *p24);

		static int cifs_calculate_signature(const struct smb_hdr *cifs_pdu,
		struct TCP_Server_Info server, char signature)
		const struct mac_key key, char signature)
		{
		int rc = 0;
		struct {
		struct shash_desc shash;
		char ctx[crypto_shash_descsize(server->ntlmssp.md5)];
		} sdesc;
		struct MD5Context context;

		if (cifs_pdu == NULL \|\| server == NULL \|\| signature == NULL)
		if ((cifs_pdu == NULL) \|\| (signature == NULL) \|\| (key == NULL))
		return -EINVAL;

		sdesc.shash.tfm = server->ntlmssp.md5;
		sdesc.shash.flags = 0x0;

		rc = crypto_shash_init(&sdesc.shash);
		if (rc) {
		cERROR(1, "could not initialize master crypto API hmacmd5\n");
		return rc;
		}

		if (server->secType == RawNTLMSSP)
		crypto_shash_update(&sdesc.shash,
		server->session_key.data.ntlmv2.key,
		CIFS_NTLMV2_SESSKEY_SIZE);
		else
		crypto_shash_update(&sdesc.shash,
		(char *)&server->session_key.data,
		server->session_key.len);

		crypto_shash_update(&sdesc.shash,
		cifs_pdu->Protocol, cifs_pdu->smb_buf_length);

		rc = crypto_shash_final(&sdesc.shash, signature);
		cifs_MD5_init(&context);
		cifs_MD5_update(&context, (char *)&key->data, key->len);
		cifs_MD5_update(&context, cifs_pdu->Protocol, cifs_pdu->smb_buf_length);

		cifs_MD5_final(signature, &context);
		return 0;
		}


		int cifs_sign_smb(struct smb_hdr cifs_pdu, struct TCP_Server_Info server,
		__u32 *pexpected_response_sequence_number)
		{
		@@ -102,7 +78,8 @@ int cifs_sign_smb(struct smb_hdr cifs_pdu, struct TCP_Server_Info server,
		server->sequence_number++;
		spin_unlock(&GlobalMid_Lock);

		rc = cifs_calculate_signature(cifs_pdu, server, smb_signature);
		rc = cifs_calculate_signature(cifs_pdu, &server->mac_signing_key,
		smb_signature);
		if (rc)
		memset(cifs_pdu->Signature.SecuritySignature, 0, 8);
		else
		@@ -112,36 +89,16 @@ int cifs_sign_smb(struct smb_hdr cifs_pdu, struct TCP_Server_Info server,
		}

		static int cifs_calc_signature2(const struct kvec *iov, int n_vec,
		struct TCP_Server_Info server, char signature)
		const struct mac_key key, char signature)
		{
		struct MD5Context context;
		int i;
		int rc = 0;
		struct {
		struct shash_desc shash;
		char ctx[crypto_shash_descsize(server->ntlmssp.md5)];
		} sdesc;

		if (iov == NULL \|\| server == NULL \|\| signature == NULL)
		if ((iov == NULL) \|\| (signature == NULL) \|\| (key == NULL))
		return -EINVAL;

		sdesc.shash.tfm = server->ntlmssp.md5;
		sdesc.shash.flags = 0x0;

		rc = crypto_shash_init(&sdesc.shash);
		if (rc) {
		cERROR(1, "could not initialize master crypto API hmacmd5\n");
		return rc;
		}

		if (server->secType == RawNTLMSSP)
		crypto_shash_update(&sdesc.shash,
		server->session_key.data.ntlmv2.key,
		CIFS_NTLMV2_SESSKEY_SIZE);
		else
		crypto_shash_update(&sdesc.shash,
		(char *)&server->session_key.data,
		server->session_key.len);

		cifs_MD5_init(&context);
		cifs_MD5_update(&context, (char *)&key->data, key->len);
		for (i = 0; i < n_vec; i++) {
		if (iov[i].iov_len == 0)
		continue;
		@@ -154,18 +111,18 @@ static int cifs_calc_signature2(const struct kvec *iov, int n_vec,
		if (i == 0) {
		if (iov[0].iov_len <= 8) /* cmd field at offset 9 */
		break; /* nothing to sign or corrupt header */
		crypto_shash_update(&sdesc.shash,
		iov[i].iov_base + 4, iov[i].iov_len - 4);
		cifs_MD5_update(&context, iov[0].iov_base+4,
		iov[0].iov_len-4);
		} else
		crypto_shash_update(&sdesc.shash,
		iov[i].iov_base, iov[i].iov_len);
		cifs_MD5_update(&context, iov[i].iov_base, iov[i].iov_len);
		}

		rc = crypto_shash_final(&sdesc.shash, signature);
		cifs_MD5_final(signature, &context);

		return 0;
		}


		int cifs_sign_smb2(struct kvec iov, int n_vec, struct TCP_Server_Info server,
		__u32 *pexpected_response_sequence_number)
		{
		@@ -188,7 +145,8 @@ int cifs_sign_smb2(struct kvec iov, int n_vec, struct TCP_Server_Info server,
		server->sequence_number++;
		spin_unlock(&GlobalMid_Lock);

		rc = cifs_calc_signature2(iov, n_vec, server, smb_signature);
		rc = cifs_calc_signature2(iov, n_vec, &server->mac_signing_key,
		smb_signature);
		if (rc)
		memset(cifs_pdu->Signature.SecuritySignature, 0, 8);
		else
		@@ -198,14 +156,14 @@ int cifs_sign_smb2(struct kvec iov, int n_vec, struct TCP_Server_Info server,
		}

		int cifs_verify_signature(struct smb_hdr *cifs_pdu,
		struct TCP_Server_Info *server,
		const struct mac_key *mac_key,
		__u32 expected_sequence_number)
		{
		int rc;
		unsigned int rc;
		char server_response_sig[8];
		char what_we_think_sig_should_be[20];

		if (cifs_pdu == NULL \|\| server == NULL)
		if ((cifs_pdu == NULL) \|\| (mac_key == NULL))
		return -EINVAL;

		if (cifs_pdu->Command == SMB_COM_NEGOTIATE)
		@@ -234,7 +192,7 @@ int cifs_verify_signature(struct smb_hdr *cifs_pdu,
		cpu_to_le32(expected_sequence_number);
		cifs_pdu->Signature.Sequence.Reserved = 0;

		rc = cifs_calculate_signature(cifs_pdu, server,
		rc = cifs_calculate_signature(cifs_pdu, mac_key,
		what_we_think_sig_should_be);

		if (rc)
		@@ -251,7 +209,7 @@ int cifs_verify_signature(struct smb_hdr *cifs_pdu,
		}

		/* We fill in key by putting in 40 byte array which was allocated by caller */
		int cifs_calculate_session_key(struct session_key key, const char rn,
		int cifs_calculate_mac_key(struct mac_key key, const char rn,
		const char *password)
		{
		char temp_key[16];
		@@ -265,6 +223,63 @@ int cifs_calculate_session_key(struct session_key key, const char rn,
		return 0;
		}

		int CalcNTLMv2_partial_mac_key(struct cifsSesInfo *ses,
		const struct nls_table *nls_info)
		{
		char temp_hash[16];
		struct HMACMD5Context ctx;
		char *ucase_buf;
		__le16 *unicode_buf;
		unsigned int i, user_name_len, dom_name_len;

		if (ses == NULL)
		return -EINVAL;

		E_md4hash(ses->password, temp_hash);

		hmac_md5_init_limK_to_64(temp_hash, 16, &ctx);
		user_name_len = strlen(ses->userName);
		if (user_name_len > MAX_USERNAME_SIZE)
		return -EINVAL;
		if (ses->domainName == NULL)
		return -EINVAL; /* BB should we use CIFS_LINUX_DOM */
		dom_name_len = strlen(ses->domainName);
		if (dom_name_len > MAX_USERNAME_SIZE)
		return -EINVAL;

		ucase_buf = kmalloc((MAX_USERNAME_SIZE+1), GFP_KERNEL);
		if (ucase_buf == NULL)
		return -ENOMEM;
		unicode_buf = kmalloc((MAX_USERNAME_SIZE+1)*4, GFP_KERNEL);
		if (unicode_buf == NULL) {
		kfree(ucase_buf);
		return -ENOMEM;
		}

		for (i = 0; i < user_name_len; i++)
		ucase_buf[i] = nls_info->charset2upper[(int)ses->userName[i]];
		ucase_buf[i] = 0;
		user_name_len = cifs_strtoUCS(unicode_buf, ucase_buf,
		MAX_USERNAME_SIZE*2, nls_info);
		unicode_buf[user_name_len] = 0;
		user_name_len++;

		for (i = 0; i < dom_name_len; i++)
		ucase_buf[i] = nls_info->charset2upper[(int)ses->domainName[i]];
		ucase_buf[i] = 0;
		dom_name_len = cifs_strtoUCS(unicode_buf+user_name_len, ucase_buf,
		MAX_USERNAME_SIZE*2, nls_info);

		unicode_buf[user_name_len + dom_name_len] = 0;
		hmac_md5_update((const unsigned char *) unicode_buf,
		(user_name_len+dom_name_len)*2, &ctx);

		hmac_md5_final(ses->server->ntlmv2_hash, &ctx);
		kfree(ucase_buf);
		kfree(unicode_buf);
		return 0;
		}

		#ifdef CONFIG_CIFS_WEAK_PW_HASH
		void calc_lanman_hash(const char password, const char cryptkey, bool encrypt,
		char *lnm_session_key)
		@@ -309,29 +324,21 @@ static int calc_ntlmv2_hash(struct cifsSesInfo *ses,
		{
		int rc = 0;
		int len;
		char nt_hash[CIFS_NTHASH_SIZE];
		char nt_hash[16];
		struct HMACMD5Context *pctxt;
		wchar_t *user;
		wchar_t *domain;
		wchar_t *server;
		struct {
		struct shash_desc shash;
		char ctx[crypto_shash_descsize(ses->server->ntlmssp.hmacmd5)];
		} sdesc;

		/* calculate md4 hash of password */
		E_md4hash(ses->password, nt_hash);
		pctxt = kmalloc(sizeof(struct HMACMD5Context), GFP_KERNEL);

		sdesc.shash.tfm = ses->server->ntlmssp.hmacmd5;
		sdesc.shash.flags = 0x0;
		if (pctxt == NULL)
		return -ENOMEM;

		crypto_shash_setkey(ses->server->ntlmssp.hmacmd5, nt_hash,
		CIFS_NTHASH_SIZE);
		/* calculate md4 hash of password */
		E_md4hash(ses->password, nt_hash);

		rc = crypto_shash_init(&sdesc.shash);
		if (rc) {
		cERROR(1, "could not initialize master crypto API hmacmd5\n");
		return rc;
		}
		/* convert Domainname to unicode and uppercase */
		hmac_md5_init_limK_to_64(nt_hash, 16, pctxt);

		/* convert ses->userName to unicode and uppercase */
		len = strlen(ses->userName);
		@@ -340,8 +347,7 @@ static int calc_ntlmv2_hash(struct cifsSesInfo *ses,
		goto calc_exit_2;
		len = cifs_strtoUCS((__le16 *)user, ses->userName, len, nls_cp);
		UniStrupr(user);

		crypto_shash_update(&sdesc.shash, (char )user, 2 len);
		hmac_md5_update((char )user, 2len, pctxt);

		/* convert ses->domainName to unicode and uppercase */
		if (ses->domainName) {
		@@ -357,243 +363,65 @@ static int calc_ntlmv2_hash(struct cifsSesInfo *ses,
		Maybe converting the domain name earlier makes sense */
		/* UniStrupr(domain); */

		crypto_shash_update(&sdesc.shash, (char )domain, 2 len);
		hmac_md5_update((char )domain, 2len, pctxt);

		kfree(domain);
		} else if (ses->serverName) {
		len = strlen(ses->serverName);

		server = kmalloc(2 + (len * 2), GFP_KERNEL);
		if (server == NULL)
		goto calc_exit_1;
		len = cifs_strtoUCS((__le16 *)server, ses->serverName, len,
		nls_cp);
		/* the following line was removed since it didn't work well
		with lower cased domain name that passed as an option.
		Maybe converting the domain name earlier makes sense */
		/* UniStrupr(domain); */

		crypto_shash_update(&sdesc.shash, (char )server, 2 len);

		kfree(server);
		}
		calc_exit_1:
		kfree(user);
		calc_exit_2:
		/* BB FIXME what about bytes 24 through 40 of the signing key?
		compare with the NTLM example */
		rc = crypto_shash_final(&sdesc.shash, ses->server->ntlmv2_hash);
		hmac_md5_final(ses->server->ntlmv2_hash, pctxt);

		kfree(pctxt);
		return rc;
		}

		static int
		find_domain_name(struct cifsSesInfo *ses)
		{
		int rc = 0;
		unsigned int attrsize;
		unsigned int type;
		unsigned char *blobptr;
		struct ntlmssp2_name *attrptr;

		if (ses->server->tiblob) {
		blobptr = ses->server->tiblob;
		attrptr = (struct ntlmssp2_name *) blobptr;

		while ((type = attrptr->type) != 0) {
		blobptr += 2; /* advance attr type */
		attrsize = attrptr->length;
		blobptr += 2; /* advance attr size */
		if (type == NTLMSSP_AV_NB_DOMAIN_NAME) {
		if (!ses->domainName) {
		ses->domainName =
		kmalloc(attrptr->length + 1,
		GFP_KERNEL);
		if (!ses->domainName)
		return -ENOMEM;
		cifs_from_ucs2(ses->domainName,
		(__le16 *)blobptr,
		attrptr->length,
		attrptr->length,
		load_nls_default(), false);
		}
		}
		blobptr += attrsize; /* advance attr value */
		attrptr = (struct ntlmssp2_name *) blobptr;
		}
		} else {
		ses->server->tilen = 2 * sizeof(struct ntlmssp2_name);
		ses->server->tiblob = kmalloc(ses->server->tilen, GFP_KERNEL);
		if (!ses->server->tiblob) {
		ses->server->tilen = 0;
		cERROR(1, "Challenge target info allocation failure");
		return -ENOMEM;
		}
		memset(ses->server->tiblob, 0x0, ses->server->tilen);
		attrptr = (struct ntlmssp2_name *) ses->server->tiblob;
		attrptr->type = cpu_to_le16(NTLMSSP_DOMAIN_TYPE);
		}

		return rc;
		}

		static int
		CalcNTLMv2_response(const struct TCP_Server_Info *server,
		char *v2_session_response)
		{
		int rc;
		struct {
		struct shash_desc shash;
		char ctx[crypto_shash_descsize(server->ntlmssp.hmacmd5)];
		} sdesc;

		sdesc.shash.tfm = server->ntlmssp.hmacmd5;
		sdesc.shash.flags = 0x0;

		crypto_shash_setkey(server->ntlmssp.hmacmd5, server->ntlmv2_hash,
		CIFS_HMAC_MD5_HASH_SIZE);

		rc = crypto_shash_init(&sdesc.shash);
		if (rc) {
		cERROR(1, "could not initialize master crypto API hmacmd5\n");
		return rc;
		}

		memcpy(v2_session_response + CIFS_SERVER_CHALLENGE_SIZE,
		server->cryptKey, CIFS_SERVER_CHALLENGE_SIZE);
		crypto_shash_update(&sdesc.shash,
		v2_session_response + CIFS_SERVER_CHALLENGE_SIZE,
		sizeof(struct ntlmv2_resp) - CIFS_SERVER_CHALLENGE_SIZE);

		if (server->tilen)
		crypto_shash_update(&sdesc.shash,
		server->tiblob, server->tilen);

		rc = crypto_shash_final(&sdesc.shash, v2_session_response);

		return rc;
		}

		int
		setup_ntlmv2_rsp(struct cifsSesInfo ses, char resp_buf,
		void setup_ntlmv2_rsp(struct cifsSesInfo ses, char resp_buf,
		const struct nls_table *nls_cp)
		{
		int rc = 0;
		int rc;
		struct ntlmv2_resp buf = (struct ntlmv2_resp )resp_buf;
		struct {
		struct shash_desc shash;
		char ctx[crypto_shash_descsize(ses->server->ntlmssp.hmacmd5)];
		} sdesc;
		struct HMACMD5Context context;

		buf->blob_signature = cpu_to_le32(0x00000101);
		buf->reserved = 0;
		buf->time = cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
		get_random_bytes(&buf->client_chal, sizeof(buf->client_chal));
		buf->reserved2 = 0;

		if (!ses->domainName) {
		rc = find_domain_name(ses);
		if (rc) {
		cERROR(1, "could not get domain/server name rc %d", rc);
		return rc;
		}
		}
		buf->names[0].type = cpu_to_le16(NTLMSSP_DOMAIN_TYPE);
		buf->names[0].length = 0;
		buf->names[1].type = 0;
		buf->names[1].length = 0;

		/* calculate buf->ntlmv2_hash */
		rc = calc_ntlmv2_hash(ses, nls_cp);
		if (rc) {
		cERROR(1, "could not get v2 hash rc %d", rc);
		return rc;
		}
		rc = CalcNTLMv2_response(ses->server, resp_buf);
		if (rc) {
		if (rc)
		cERROR(1, "could not get v2 hash rc %d", rc);
		return rc;
		}

		crypto_shash_setkey(ses->server->ntlmssp.hmacmd5,
		ses->server->ntlmv2_hash, CIFS_HMAC_MD5_HASH_SIZE);

		sdesc.shash.tfm = ses->server->ntlmssp.hmacmd5;
		sdesc.shash.flags = 0x0;

		rc = crypto_shash_init(&sdesc.shash);
		if (rc) {
		cERROR(1, "could not initialize master crypto API hmacmd5\n");
		return rc;
		}
		CalcNTLMv2_response(ses, resp_buf);

		crypto_shash_update(&sdesc.shash, resp_buf, CIFS_HMAC_MD5_HASH_SIZE);
		/* now calculate the MAC key for NTLMv2 */
		hmac_md5_init_limK_to_64(ses->server->ntlmv2_hash, 16, &context);
		hmac_md5_update(resp_buf, 16, &context);
		hmac_md5_final(ses->server->mac_signing_key.data.ntlmv2.key, &context);

		rc = crypto_shash_final(&sdesc.shash,
		ses->server->session_key.data.ntlmv2.key);

		memcpy(&ses->server->session_key.data.ntlmv2.resp, resp_buf,
		memcpy(&ses->server->mac_signing_key.data.ntlmv2.resp, resp_buf,
		sizeof(struct ntlmv2_resp));
		ses->server->session_key.len = 16 + sizeof(struct ntlmv2_resp);

		return rc;
		}

		int
		calc_seckey(struct TCP_Server_Info *server)
		{
		int rc;
		unsigned char sec_key[CIFS_NTLMV2_SESSKEY_SIZE];
		struct crypto_blkcipher *tfm_arc4;
		struct scatterlist sgin, sgout;
		struct blkcipher_desc desc;

		get_random_bytes(sec_key, CIFS_NTLMV2_SESSKEY_SIZE);

		tfm_arc4 = crypto_alloc_blkcipher("ecb(arc4)",
		0, CRYPTO_ALG_ASYNC);
		if (!tfm_arc4 \|\| IS_ERR(tfm_arc4)) {
		cERROR(1, "could not allocate " "master crypto API arc4\n");
		return 1;
		ses->server->mac_signing_key.len = 16 + sizeof(struct ntlmv2_resp);
		}

		crypto_blkcipher_setkey(tfm_arc4,
		server->session_key.data.ntlmv2.key, CIFS_CPHTXT_SIZE);
		sg_init_one(&sgin, sec_key, CIFS_CPHTXT_SIZE);
		sg_init_one(&sgout, server->ntlmssp.ciphertext, CIFS_CPHTXT_SIZE);
		rc = crypto_blkcipher_encrypt(&desc, &sgout, &sgin, CIFS_CPHTXT_SIZE);

		if (!rc)
		memcpy(server->session_key.data.ntlmv2.key,
		sec_key, CIFS_NTLMV2_SESSKEY_SIZE);

		crypto_free_blkcipher(tfm_arc4);

		return 0;
		}

		void
		cifs_crypto_shash_release(struct TCP_Server_Info *server)
		{
		if (server->ntlmssp.md5)
		crypto_free_shash(server->ntlmssp.md5);

		if (server->ntlmssp.hmacmd5)
		crypto_free_shash(server->ntlmssp.hmacmd5);
		}

		int
		cifs_crypto_shash_allocate(struct TCP_Server_Info *server)
		void CalcNTLMv2_response(const struct cifsSesInfo *ses,
		char *v2_session_response)
		{
		server->ntlmssp.hmacmd5 = crypto_alloc_shash("hmac(md5)", 0, 0);
		if (!server->ntlmssp.hmacmd5 \|\|
		IS_ERR(server->ntlmssp.hmacmd5)) {
		cERROR(1, "could not allocate master crypto API hmacmd5\n");
		return 1;
		}
		struct HMACMD5Context context;
		/* rest of v2 struct already generated */
		memcpy(v2_session_response + 8, ses->server->cryptKey, 8);
		hmac_md5_init_limK_to_64(ses->server->ntlmv2_hash, 16, &context);

		server->ntlmssp.md5 = crypto_alloc_shash("md5", 0, 0);
		if (!server->ntlmssp.md5 \|\| IS_ERR(server->ntlmssp.md5)) {
		crypto_free_shash(server->ntlmssp.hmacmd5);
		cERROR(1, "could not allocate master crypto API md5\n");
		return 1;
		}
		hmac_md5_update(v2_session_response+8,
		sizeof(struct ntlmv2_resp) - 8, &context);

		return 0;
		hmac_md5_final(v2_session_response, &context);
		/* cifs_dump_mem("v2_sess_rsp: ", v2_session_response, 32); */
		}

fs/cifs/cifsglob.h

+2 −16

Original line number	Diff line number	Diff line
		@@ -25,9 +25,6 @@
		#include <linux/workqueue.h>
		#include "cifs_fs_sb.h"
		#include "cifsacl.h"
		#include <crypto/internal/hash.h>
		#include <linux/scatterlist.h>

		/*
		* The sizes of various internal tables and strings
		*/
		@@ -100,7 +97,7 @@ enum protocolEnum {
		/* Netbios frames protocol not supported at this time */
		};

		struct session_key {
		struct mac_key {
		unsigned int len;
		union {
		char ntlm[CIFS_SESS_KEY_SIZE + 16];
		@@ -123,14 +120,6 @@ struct cifs_cred {
		struct cifs_ace *aces;
		};

		struct ntlmssp_auth {
		__u32 client_flags;
		__u32 server_flags;
		unsigned char ciphertext[CIFS_CPHTXT_SIZE];
		struct crypto_shash *hmacmd5;
		struct crypto_shash *md5;
		};

		/*
		*****************************************************************
		* Except the CIFS PDUs themselves all the
		@@ -193,14 +182,11 @@ struct TCP_Server_Info {
		/* 16th byte of RFC1001 workstation name is always null */
		char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
		__u32 sequence_number; /* needed for CIFS PDU signature */
		struct session_key session_key;
		struct mac_key mac_signing_key;
		char ntlmv2_hash[16];
		unsigned long lstrp; /* when we got last response from this server */
		u16 dialect; /* dialect index that server chose */
		/* extended security flavors that server supports */
		unsigned int tilen; /* length of the target info blob */
		unsigned char tiblob; / target info blob in challenge response */
		struct ntlmssp_auth ntlmssp; /* various keys, ciphers, flags */
		bool sec_kerberos; /* supports plain Kerberos */
		bool sec_mskerberos; /* supports legacy MS Kerberos */
		bool sec_kerberosu2u; /* supports U2U Kerberos */

fs/cifs/cifspdu.h

+1 −6

Original line number	Diff line number	Diff line
		@@ -134,12 +134,6 @@
		* Size of the session key (crypto key encrypted with the password
		*/
		#define CIFS_SESS_KEY_SIZE (24)
		#define CIFS_CLIENT_CHALLENGE_SIZE (8)
		#define CIFS_SERVER_CHALLENGE_SIZE (8)
		#define CIFS_HMAC_MD5_HASH_SIZE (16)
		#define CIFS_CPHTXT_SIZE (16)
		#define CIFS_NTLMV2_SESSKEY_SIZE (16)
		#define CIFS_NTHASH_SIZE (16)

		/*
		* Maximum user name length
		@@ -669,6 +663,7 @@ struct ntlmv2_resp {
		__le64 time;
		__u64 client_chal; /* random */
		__u32 reserved2;
		struct ntlmssp2_name names[2];
		/* array of name entries could follow ending in minimum 4 byte struct */
		} __attribute__((packed));