158 lines · c
1/* SPDX-License-Identifier: LGPL-2.1 */2/*3 *4 * Copyright (c) International Business Machines Corp., 2002,20075 * Author(s): Steve French (sfrench@us.ibm.com)6 *7 */8 9#define NTLMSSP_SIGNATURE "NTLMSSP"10/* Message Types */11#define NtLmNegotiate cpu_to_le32(1)12#define NtLmChallenge cpu_to_le32(2)13#define NtLmAuthenticate cpu_to_le32(3)14#define UnknownMessage cpu_to_le32(8)15 16/* Negotiate Flags */17#define NTLMSSP_NEGOTIATE_UNICODE 0x01 /* Text strings are unicode */18#define NTLMSSP_NEGOTIATE_OEM 0x02 /* Text strings are in OEM */19#define NTLMSSP_REQUEST_TARGET 0x04 /* Srv returns its auth realm */20/* define reserved9 0x08 */21#define NTLMSSP_NEGOTIATE_SIGN 0x0010 /* Request signing capability */22#define NTLMSSP_NEGOTIATE_SEAL 0x0020 /* Request confidentiality */23#define NTLMSSP_NEGOTIATE_DGRAM 0x004024#define NTLMSSP_NEGOTIATE_LM_KEY 0x0080 /* Use LM session key */25/* defined reserved 8 0x0100 */26#define NTLMSSP_NEGOTIATE_NTLM 0x0200 /* NTLM authentication */27#define NTLMSSP_NEGOTIATE_NT_ONLY 0x0400 /* Lanman not allowed */28#define NTLMSSP_ANONYMOUS 0x080029#define NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED 0x1000 /* reserved6 */30#define NTLMSSP_NEGOTIATE_WORKSTATION_SUPPLIED 0x200031#define NTLMSSP_NEGOTIATE_LOCAL_CALL 0x4000 /* client/server same machine */32#define NTLMSSP_NEGOTIATE_ALWAYS_SIGN 0x8000 /* Sign. All security levels */33#define NTLMSSP_TARGET_TYPE_DOMAIN 0x1000034#define NTLMSSP_TARGET_TYPE_SERVER 0x2000035#define NTLMSSP_TARGET_TYPE_SHARE 0x4000036#define NTLMSSP_NEGOTIATE_EXTENDED_SEC 0x80000 /* NB:not related to NTLMv2 pwd*/37/* #define NTLMSSP_REQUEST_INIT_RESP 0x100000 */38#define NTLMSSP_NEGOTIATE_IDENTIFY 0x10000039#define NTLMSSP_REQUEST_ACCEPT_RESP 0x200000 /* reserved5 */40#define NTLMSSP_REQUEST_NON_NT_KEY 0x40000041#define NTLMSSP_NEGOTIATE_TARGET_INFO 0x80000042/* #define reserved4 0x1000000 */43#define NTLMSSP_NEGOTIATE_VERSION 0x2000000 /* we only set for SMB2+ */44/* #define reserved3 0x4000000 */45/* #define reserved2 0x8000000 */46/* #define reserved1 0x10000000 */47#define NTLMSSP_NEGOTIATE_128 0x2000000048#define NTLMSSP_NEGOTIATE_KEY_XCH 0x4000000049#define NTLMSSP_NEGOTIATE_56 0x8000000050 51/* Define AV Pair Field IDs */52enum av_field_type {53 NTLMSSP_AV_EOL = 0,54 NTLMSSP_AV_NB_COMPUTER_NAME,55 NTLMSSP_AV_NB_DOMAIN_NAME,56 NTLMSSP_AV_DNS_COMPUTER_NAME,57 NTLMSSP_AV_DNS_DOMAIN_NAME,58 NTLMSSP_AV_DNS_TREE_NAME,59 NTLMSSP_AV_FLAGS,60 NTLMSSP_AV_TIMESTAMP,61 NTLMSSP_AV_RESTRICTION,62 NTLMSSP_AV_TARGET_NAME,63 NTLMSSP_AV_CHANNEL_BINDINGS64};65 66/* Although typedefs are not commonly used for structure definitions */67/* in the Linux kernel, in this particular case they are useful */68/* to more closely match the standards document for NTLMSSP from */69/* OpenGroup and to make the code more closely match the standard in */70/* appearance */71 72typedef struct _SECURITY_BUFFER {73 __le16 Length;74 __le16 MaximumLength;75 __le32 BufferOffset; /* offset to buffer */76} __attribute__((packed)) SECURITY_BUFFER;77 78typedef struct _NEGOTIATE_MESSAGE {79 __u8 Signature[sizeof(NTLMSSP_SIGNATURE)];80 __le32 MessageType; /* NtLmNegotiate = 1 */81 __le32 NegotiateFlags;82 SECURITY_BUFFER DomainName; /* RFC 1001 style and ASCII */83 SECURITY_BUFFER WorkstationName; /* RFC 1001 and ASCII */84 /* SECURITY_BUFFER for version info not present since we85 do not set the version is present flag */86 char DomainString[];87 /* followed by WorkstationString */88} __attribute__((packed)) NEGOTIATE_MESSAGE, *PNEGOTIATE_MESSAGE;89 90#define NTLMSSP_REVISION_W2K3 0x0F91 92/* See MS-NLMP section 2.2.2.10 */93struct ntlmssp_version {94 __u8 ProductMajorVersion;95 __u8 ProductMinorVersion;96 __le16 ProductBuild; /* we send the cifs.ko module version here */97 __u8 Reserved[3];98 __u8 NTLMRevisionCurrent; /* currently 0x0F */99} __packed;100 101/* see MS-NLMP section 2.2.1.1 */102struct negotiate_message {103 __u8 Signature[sizeof(NTLMSSP_SIGNATURE)];104 __le32 MessageType; /* NtLmNegotiate = 1 */105 __le32 NegotiateFlags;106 SECURITY_BUFFER DomainName; /* RFC 1001 style and ASCII */107 SECURITY_BUFFER WorkstationName; /* RFC 1001 and ASCII */108 struct ntlmssp_version Version;109 /* SECURITY_BUFFER */110 char DomainString[];111 /* followed by WorkstationString */112} __packed;113 114typedef struct _CHALLENGE_MESSAGE {115 __u8 Signature[sizeof(NTLMSSP_SIGNATURE)];116 __le32 MessageType; /* NtLmChallenge = 2 */117 SECURITY_BUFFER TargetName;118 __le32 NegotiateFlags;119 __u8 Challenge[CIFS_CRYPTO_KEY_SIZE];120 __u8 Reserved[8];121 SECURITY_BUFFER TargetInfoArray;122 /* SECURITY_BUFFER for version info not present since we123 do not set the version is present flag */124} __attribute__((packed)) CHALLENGE_MESSAGE, *PCHALLENGE_MESSAGE;125 126typedef struct _AUTHENTICATE_MESSAGE {127 __u8 Signature[sizeof(NTLMSSP_SIGNATURE)];128 __le32 MessageType; /* NtLmsAuthenticate = 3 */129 SECURITY_BUFFER LmChallengeResponse;130 SECURITY_BUFFER NtChallengeResponse;131 SECURITY_BUFFER DomainName;132 SECURITY_BUFFER UserName;133 SECURITY_BUFFER WorkstationName;134 SECURITY_BUFFER SessionKey;135 __le32 NegotiateFlags;136 struct ntlmssp_version Version;137 /* SECURITY_BUFFER */138 char UserString[];139} __attribute__((packed)) AUTHENTICATE_MESSAGE, *PAUTHENTICATE_MESSAGE;140 141/*142 * Size of the session key (crypto key encrypted with the password143 */144 145int decode_ntlmssp_challenge(char *bcc_ptr, int blob_len, struct cifs_ses *ses);146int build_ntlmssp_negotiate_blob(unsigned char **pbuffer, u16 *buflen,147 struct cifs_ses *ses,148 struct TCP_Server_Info *server,149 const struct nls_table *nls_cp);150int build_ntlmssp_smb3_negotiate_blob(unsigned char **pbuffer, u16 *buflen,151 struct cifs_ses *ses,152 struct TCP_Server_Info *server,153 const struct nls_table *nls_cp);154int build_ntlmssp_auth_blob(unsigned char **pbuffer, u16 *buflen,155 struct cifs_ses *ses,156 struct TCP_Server_Info *server,157 const struct nls_table *nls_cp);158