1 /* SPDX-License-Identifier: LGPL-2.1+ */ 2 /* 3 * Copyright (c) International Business Machines Corp., 2002,2007 4 * Author(s): Steve French (sfrench@us.ibm.com) 5 */ 6 7 #ifndef __KSMBD_NTLMSSP_H 8 #define __KSMBD_NTLMSSP_H 9 10 #define NTLMSSP_SIGNATURE "NTLMSSP" 11 12 /* Security blob target info data */ 13 #define TGT_Name "KSMBD" 14 15 /* 16 * Size of the crypto key returned on the negotiate SMB in bytes 17 */ 18 #define CIFS_CRYPTO_KEY_SIZE (8) 19 #define CIFS_KEY_SIZE (40) 20 21 /* 22 * Size of encrypted user password in bytes 23 */ 24 #define CIFS_ENCPWD_SIZE (16) 25 #define CIFS_CPHTXT_SIZE (16) 26 27 /* Message Types */ 28 #define NtLmNegotiate cpu_to_le32(1) 29 #define NtLmChallenge cpu_to_le32(2) 30 #define NtLmAuthenticate cpu_to_le32(3) 31 #define UnknownMessage cpu_to_le32(8) 32 33 /* Negotiate Flags */ 34 #define NTLMSSP_NEGOTIATE_UNICODE 0x01 /* Text strings are unicode */ 35 #define NTLMSSP_NEGOTIATE_OEM 0x02 /* Text strings are in OEM */ 36 #define NTLMSSP_REQUEST_TARGET 0x04 /* Srv returns its auth realm */ 37 /* define reserved9 0x08 */ 38 #define NTLMSSP_NEGOTIATE_SIGN 0x0010 /* Request signing capability */ 39 #define NTLMSSP_NEGOTIATE_SEAL 0x0020 /* Request confidentiality */ 40 #define NTLMSSP_NEGOTIATE_DGRAM 0x0040 41 #define NTLMSSP_NEGOTIATE_LM_KEY 0x0080 /* Use LM session key */ 42 /* defined reserved 8 0x0100 */ 43 #define NTLMSSP_NEGOTIATE_NTLM 0x0200 /* NTLM authentication */ 44 #define NTLMSSP_NEGOTIATE_NT_ONLY 0x0400 /* Lanman not allowed */ 45 #define NTLMSSP_ANONYMOUS 0x0800 46 #define NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED 0x1000 /* reserved6 */ 47 #define NTLMSSP_NEGOTIATE_WORKSTATION_SUPPLIED 0x2000 48 #define NTLMSSP_NEGOTIATE_LOCAL_CALL 0x4000 /* client/server same machine */ 49 #define NTLMSSP_NEGOTIATE_ALWAYS_SIGN 0x8000 /* Sign. All security levels */ 50 #define NTLMSSP_TARGET_TYPE_DOMAIN 0x10000 51 #define NTLMSSP_TARGET_TYPE_SERVER 0x20000 52 #define NTLMSSP_TARGET_TYPE_SHARE 0x40000 53 #define NTLMSSP_NEGOTIATE_EXTENDED_SEC 0x80000 /* NB:not related to NTLMv2 pwd*/ 54 /* #define NTLMSSP_REQUEST_INIT_RESP 0x100000 */ 55 #define NTLMSSP_NEGOTIATE_IDENTIFY 0x100000 56 #define NTLMSSP_REQUEST_ACCEPT_RESP 0x200000 /* reserved5 */ 57 #define NTLMSSP_REQUEST_NON_NT_KEY 0x400000 58 #define NTLMSSP_NEGOTIATE_TARGET_INFO 0x800000 59 /* #define reserved4 0x1000000 */ 60 #define NTLMSSP_NEGOTIATE_VERSION 0x2000000 /* we do not set */ 61 /* #define reserved3 0x4000000 */ 62 /* #define reserved2 0x8000000 */ 63 /* #define reserved1 0x10000000 */ 64 #define NTLMSSP_NEGOTIATE_128 0x20000000 65 #define NTLMSSP_NEGOTIATE_KEY_XCH 0x40000000 66 #define NTLMSSP_NEGOTIATE_56 0x80000000 67 68 /* Define AV Pair Field IDs */ 69 enum av_field_type { 70 NTLMSSP_AV_EOL = 0, 71 NTLMSSP_AV_NB_COMPUTER_NAME, 72 NTLMSSP_AV_NB_DOMAIN_NAME, 73 NTLMSSP_AV_DNS_COMPUTER_NAME, 74 NTLMSSP_AV_DNS_DOMAIN_NAME, 75 NTLMSSP_AV_DNS_TREE_NAME, 76 NTLMSSP_AV_FLAGS, 77 NTLMSSP_AV_TIMESTAMP, 78 NTLMSSP_AV_RESTRICTION, 79 NTLMSSP_AV_TARGET_NAME, 80 NTLMSSP_AV_CHANNEL_BINDINGS 81 }; 82 83 /* Although typedefs are not commonly used for structure definitions */ 84 /* in the Linux kernel, in this particular case they are useful */ 85 /* to more closely match the standards document for NTLMSSP from */ 86 /* OpenGroup and to make the code more closely match the standard in */ 87 /* appearance */ 88 89 struct security_buffer { 90 __le16 Length; 91 __le16 MaximumLength; 92 __le32 BufferOffset; /* offset to buffer */ 93 } __packed; 94 95 struct target_info { 96 __le16 Type; 97 __le16 Length; 98 __u8 Content[]; 99 } __packed; 100 101 struct negotiate_message { 102 __u8 Signature[sizeof(NTLMSSP_SIGNATURE)]; 103 __le32 MessageType; /* NtLmNegotiate = 1 */ 104 __le32 NegotiateFlags; 105 struct security_buffer DomainName; /* RFC 1001 style and ASCII */ 106 struct security_buffer WorkstationName; /* RFC 1001 and ASCII */ 107 /* 108 * struct security_buffer for version info not present since we 109 * do not set the version is present flag 110 */ 111 char DomainString[]; 112 /* followed by WorkstationString */ 113 } __packed; 114 115 struct challenge_message { 116 __u8 Signature[sizeof(NTLMSSP_SIGNATURE)]; 117 __le32 MessageType; /* NtLmChallenge = 2 */ 118 struct security_buffer TargetName; 119 __le32 NegotiateFlags; 120 __u8 Challenge[CIFS_CRYPTO_KEY_SIZE]; 121 __u8 Reserved[8]; 122 struct security_buffer TargetInfoArray; 123 /* 124 * struct security_buffer for version info not present since we 125 * do not set the version is present flag 126 */ 127 } __packed; 128 129 struct authenticate_message { 130 __u8 Signature[sizeof(NTLMSSP_SIGNATURE)]; 131 __le32 MessageType; /* NtLmsAuthenticate = 3 */ 132 struct security_buffer LmChallengeResponse; 133 struct security_buffer NtChallengeResponse; 134 struct security_buffer DomainName; 135 struct security_buffer UserName; 136 struct security_buffer WorkstationName; 137 struct security_buffer SessionKey; 138 __le32 NegotiateFlags; 139 /* 140 * struct security_buffer for version info not present since we 141 * do not set the version is present flag 142 */ 143 char UserString[]; 144 } __packed; 145 146 struct ntlmv2_resp { 147 char ntlmv2_hash[CIFS_ENCPWD_SIZE]; 148 __le32 blob_signature; 149 __u32 reserved; 150 __le64 time; 151 __u64 client_chal; /* random */ 152 __u32 reserved2; 153 /* array of name entries could follow ending in minimum 4 byte struct */ 154 } __packed; 155 156 /* per smb session structure/fields */ 157 struct ntlmssp_auth { 158 /* whether session key is per smb session */ 159 bool sesskey_per_smbsess; 160 /* sent by client in type 1 ntlmsssp exchange */ 161 __u32 client_flags; 162 /* sent by server in type 2 ntlmssp exchange */ 163 __u32 conn_flags; 164 /* sent to server */ 165 unsigned char ciphertext[CIFS_CPHTXT_SIZE]; 166 /* used by ntlmssp */ 167 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; 168 }; 169 #endif /* __KSMBD_NTLMSSP_H */ 170