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