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For improved debugging it can be helpful to send version information as other clients do during NTLMSSP negotiation. See protocol document MS-NLMP section 2.2.1.1 Set the major and minor versions based on the kernel version, and the BuildNumber based on the internal cifs.ko module version number, and following the recommendation in the protocol documentation (MS-NLMP section 2.2.10) we set the NTLMRevisionCurrent field to 15. Reviewed-by: Shyam Prasad N <sprasad@microsoft.com> Signed-off-by: Steve French <stfrench@microsoft.com>
157 lines
6 KiB
C
157 lines
6 KiB
C
/* SPDX-License-Identifier: LGPL-2.1 */
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/*
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*
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* Copyright (c) International Business Machines Corp., 2002,2007
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* Author(s): Steve French (sfrench@us.ibm.com)
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*
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*/
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#define NTLMSSP_SIGNATURE "NTLMSSP"
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/* Message Types */
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#define NtLmNegotiate cpu_to_le32(1)
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#define NtLmChallenge cpu_to_le32(2)
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#define NtLmAuthenticate cpu_to_le32(3)
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#define UnknownMessage cpu_to_le32(8)
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/* Negotiate Flags */
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#define NTLMSSP_NEGOTIATE_UNICODE 0x01 /* Text strings are unicode */
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#define NTLMSSP_NEGOTIATE_OEM 0x02 /* Text strings are in OEM */
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#define NTLMSSP_REQUEST_TARGET 0x04 /* Srv returns its auth realm */
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/* define reserved9 0x08 */
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#define NTLMSSP_NEGOTIATE_SIGN 0x0010 /* Request signing capability */
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#define NTLMSSP_NEGOTIATE_SEAL 0x0020 /* Request confidentiality */
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#define NTLMSSP_NEGOTIATE_DGRAM 0x0040
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#define NTLMSSP_NEGOTIATE_LM_KEY 0x0080 /* Use LM session key */
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/* defined reserved 8 0x0100 */
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#define NTLMSSP_NEGOTIATE_NTLM 0x0200 /* NTLM authentication */
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#define NTLMSSP_NEGOTIATE_NT_ONLY 0x0400 /* Lanman not allowed */
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#define NTLMSSP_ANONYMOUS 0x0800
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#define NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED 0x1000 /* reserved6 */
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#define NTLMSSP_NEGOTIATE_WORKSTATION_SUPPLIED 0x2000
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#define NTLMSSP_NEGOTIATE_LOCAL_CALL 0x4000 /* client/server same machine */
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#define NTLMSSP_NEGOTIATE_ALWAYS_SIGN 0x8000 /* Sign. All security levels */
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#define NTLMSSP_TARGET_TYPE_DOMAIN 0x10000
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#define NTLMSSP_TARGET_TYPE_SERVER 0x20000
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#define NTLMSSP_TARGET_TYPE_SHARE 0x40000
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#define NTLMSSP_NEGOTIATE_EXTENDED_SEC 0x80000 /* NB:not related to NTLMv2 pwd*/
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/* #define NTLMSSP_REQUEST_INIT_RESP 0x100000 */
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#define NTLMSSP_NEGOTIATE_IDENTIFY 0x100000
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#define NTLMSSP_REQUEST_ACCEPT_RESP 0x200000 /* reserved5 */
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#define NTLMSSP_REQUEST_NON_NT_KEY 0x400000
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#define NTLMSSP_NEGOTIATE_TARGET_INFO 0x800000
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/* #define reserved4 0x1000000 */
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#define NTLMSSP_NEGOTIATE_VERSION 0x2000000 /* we only set for SMB2+ */
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/* #define reserved3 0x4000000 */
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/* #define reserved2 0x8000000 */
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/* #define reserved1 0x10000000 */
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#define NTLMSSP_NEGOTIATE_128 0x20000000
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#define NTLMSSP_NEGOTIATE_KEY_XCH 0x40000000
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#define NTLMSSP_NEGOTIATE_56 0x80000000
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/* Define AV Pair Field IDs */
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enum av_field_type {
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NTLMSSP_AV_EOL = 0,
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NTLMSSP_AV_NB_COMPUTER_NAME,
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NTLMSSP_AV_NB_DOMAIN_NAME,
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NTLMSSP_AV_DNS_COMPUTER_NAME,
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NTLMSSP_AV_DNS_DOMAIN_NAME,
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NTLMSSP_AV_DNS_TREE_NAME,
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NTLMSSP_AV_FLAGS,
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NTLMSSP_AV_TIMESTAMP,
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NTLMSSP_AV_RESTRICTION,
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NTLMSSP_AV_TARGET_NAME,
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NTLMSSP_AV_CHANNEL_BINDINGS
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};
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/* Although typedefs are not commonly used for structure definitions */
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/* in the Linux kernel, in this particular case they are useful */
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/* to more closely match the standards document for NTLMSSP from */
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/* OpenGroup and to make the code more closely match the standard in */
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/* appearance */
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typedef struct _SECURITY_BUFFER {
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__le16 Length;
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__le16 MaximumLength;
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__le32 BufferOffset; /* offset to buffer */
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} __attribute__((packed)) SECURITY_BUFFER;
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typedef struct _NEGOTIATE_MESSAGE {
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__u8 Signature[sizeof(NTLMSSP_SIGNATURE)];
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__le32 MessageType; /* NtLmNegotiate = 1 */
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__le32 NegotiateFlags;
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SECURITY_BUFFER DomainName; /* RFC 1001 style and ASCII */
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SECURITY_BUFFER WorkstationName; /* RFC 1001 and ASCII */
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/* SECURITY_BUFFER for version info not present since we
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do not set the version is present flag */
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char DomainString[0];
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/* followed by WorkstationString */
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} __attribute__((packed)) NEGOTIATE_MESSAGE, *PNEGOTIATE_MESSAGE;
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#define NTLMSSP_REVISION_W2K3 0x0F
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/* See MS-NLMP section 2.2.2.10 */
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struct ntlmssp_version {
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__u8 ProductMajorVersion;
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__u8 ProductMinorVersion;
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__le16 ProductBuild; /* we send the cifs.ko module version here */
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__u8 Reserved[3];
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__u8 NTLMRevisionCurrent; /* currently 0x0F */
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} __packed;
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/* see MS-NLMP section 2.2.1.1 */
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struct negotiate_message {
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__u8 Signature[sizeof(NTLMSSP_SIGNATURE)];
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__le32 MessageType; /* NtLmNegotiate = 1 */
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__le32 NegotiateFlags;
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SECURITY_BUFFER DomainName; /* RFC 1001 style and ASCII */
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SECURITY_BUFFER WorkstationName; /* RFC 1001 and ASCII */
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struct ntlmssp_version Version;
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/* SECURITY_BUFFER */
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char DomainString[0];
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/* followed by WorkstationString */
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} __packed;
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typedef struct _CHALLENGE_MESSAGE {
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__u8 Signature[sizeof(NTLMSSP_SIGNATURE)];
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__le32 MessageType; /* NtLmChallenge = 2 */
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SECURITY_BUFFER TargetName;
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__le32 NegotiateFlags;
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__u8 Challenge[CIFS_CRYPTO_KEY_SIZE];
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__u8 Reserved[8];
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SECURITY_BUFFER TargetInfoArray;
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/* SECURITY_BUFFER for version info not present since we
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do not set the version is present flag */
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} __attribute__((packed)) CHALLENGE_MESSAGE, *PCHALLENGE_MESSAGE;
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typedef struct _AUTHENTICATE_MESSAGE {
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__u8 Signature[sizeof(NTLMSSP_SIGNATURE)];
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__le32 MessageType; /* NtLmsAuthenticate = 3 */
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SECURITY_BUFFER LmChallengeResponse;
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SECURITY_BUFFER NtChallengeResponse;
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SECURITY_BUFFER DomainName;
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SECURITY_BUFFER UserName;
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SECURITY_BUFFER WorkstationName;
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SECURITY_BUFFER SessionKey;
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__le32 NegotiateFlags;
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/* SECURITY_BUFFER for version info not present since we
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do not set the version is present flag */
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char UserString[0];
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} __attribute__((packed)) AUTHENTICATE_MESSAGE, *PAUTHENTICATE_MESSAGE;
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/*
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* Size of the session key (crypto key encrypted with the password
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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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int build_ntlmssp_negotiate_blob(unsigned char **pbuffer, u16 *buflen,
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struct cifs_ses *ses,
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struct TCP_Server_Info *server,
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const struct nls_table *nls_cp);
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int build_ntlmssp_smb3_negotiate_blob(unsigned char **pbuffer, u16 *buflen,
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struct cifs_ses *ses,
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struct TCP_Server_Info *server,
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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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struct TCP_Server_Info *server,
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const struct nls_table *nls_cp);
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