diff options
Diffstat (limited to 'fs/cifs/cifssmb.c')
| -rw-r--r-- | fs/cifs/cifssmb.c | 95 |
1 files changed, 85 insertions, 10 deletions
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c index f00369277c0..da3154fa9c8 100644 --- a/fs/cifs/cifssmb.c +++ b/fs/cifs/cifssmb.c @@ -44,8 +44,11 @@ static struct { int index; char *name; } protocols[] = { +#ifdef CONFIG_CIFS_WEAK_PW_HASH + {LANMAN_PROT, "\2LM1.2X002"}, +#endif /* weak password hashing for legacy clients */ {CIFS_PROT, "\2NT LM 0.12"}, - {CIFS_PROT, "\2POSIX 2"}, + {POSIX_PROT, "\2POSIX 2"}, {BAD_PROT, "\2"} }; #else @@ -53,11 +56,29 @@ static struct { int index; char *name; } protocols[] = { +#ifdef CONFIG_CIFS_WEAK_PW_HASH + {LANMAN_PROT, "\2LM1.2X002"}, +#endif /* weak password hashing for legacy clients */ {CIFS_PROT, "\2NT LM 0.12"}, {BAD_PROT, "\2"} }; #endif +/* define the number of elements in the cifs dialect array */ +#ifdef CONFIG_CIFS_POSIX +#ifdef CONFIG_CIFS_WEAK_PW_HASH +#define CIFS_NUM_PROT 3 +#else +#define CIFS_NUM_PROT 2 +#endif /* CIFS_WEAK_PW_HASH */ +#else /* not posix */ +#ifdef CONFIG_CIFS_WEAK_PW_HASH +#define CIFS_NUM_PROT 2 +#else +#define CIFS_NUM_PROT 1 +#endif /* CONFIG_CIFS_WEAK_PW_HASH */ +#endif /* CIFS_POSIX */ + /* Mark as invalid, all open files on tree connections since they were closed when session to server was lost */ @@ -322,7 +343,8 @@ smb_init(int smb_command, int wct, struct cifsTconInfo *tcon, /* potential retries of smb operations it turns out we can determine */ /* from the mid flags when the request buffer can be resent without */ /* having to use a second distinct buffer for the response */ - *response_buf = *request_buf; + if(response_buf) + *response_buf = *request_buf; header_assemble((struct smb_hdr *) *request_buf, smb_command, tcon, wct /*wct */ ); @@ -373,6 +395,7 @@ CIFSSMBNegotiate(unsigned int xid, struct cifsSesInfo *ses) NEGOTIATE_RSP *pSMBr; int rc = 0; int bytes_returned; + int i; struct TCP_Server_Info * server; u16 count; @@ -388,19 +411,71 @@ CIFSSMBNegotiate(unsigned int xid, struct cifsSesInfo *ses) return rc; pSMB->hdr.Mid = GetNextMid(server); pSMB->hdr.Flags2 |= SMBFLG2_UNICODE; - if (extended_security) - pSMB->hdr.Flags2 |= SMBFLG2_EXT_SEC; - - count = strlen(protocols[0].name) + 1; - strncpy(pSMB->DialectsArray, protocols[0].name, 30); - /* null guaranteed to be at end of source and target buffers anyway */ - +/* if (extended_security) + pSMB->hdr.Flags2 |= SMBFLG2_EXT_SEC;*/ + + count = 0; + for(i=0;i<CIFS_NUM_PROT;i++) { + strncpy(pSMB->DialectsArray+count, protocols[i].name, 16); + count += strlen(protocols[i].name) + 1; + /* null at end of source and target buffers anyway */ + } pSMB->hdr.smb_buf_length += count; pSMB->ByteCount = cpu_to_le16(count); rc = SendReceive(xid, ses, (struct smb_hdr *) pSMB, (struct smb_hdr *) pSMBr, &bytes_returned, 0); if (rc == 0) { + cFYI(1,("Dialect: %d", pSMBr->DialectIndex)); + /* Check wct = 1 error case */ + if((pSMBr->hdr.WordCount < 13) + || (pSMBr->DialectIndex == BAD_PROT)) { + /* core returns wct = 1, but we do not ask for + core - otherwise it just comes when dialect + index is -1 indicating we could not negotiate + a common dialect */ + rc = -EOPNOTSUPP; + goto neg_err_exit; + } else if((pSMBr->hdr.WordCount == 13) && + (pSMBr->DialectIndex == LANMAN_PROT)) { + struct lanman_neg_rsp * rsp = + (struct lanman_neg_rsp *)pSMBr; + + + /* BB Mark ses struct as negotiated lanman level BB */ + server->secType = LANMAN; + server->secMode = (__u8)le16_to_cpu(rsp->SecurityMode); + server->maxReq = le16_to_cpu(rsp->MaxMpxCount); + server->maxBuf = min((__u32)le16_to_cpu(rsp->MaxBufSize), + (__u32)CIFSMaxBufSize + MAX_CIFS_HDR_SIZE); + + /* BB what do we do with raw mode? BB */ + server->timeZone = le16_to_cpu(rsp->ServerTimeZone); + /* Do we have to set signing flags? no signing + was available LANMAN - default should be ok */ + + /* BB FIXME set default dummy capabilities since + they are not returned by the server in this dialect */ + + /* get server time for time conversions and add + code to use it and timezone since this is not UTC */ + + if (rsp->EncryptionKeyLength == CIFS_CRYPTO_KEY_SIZE) { + memcpy(server->cryptKey, rsp->EncryptionKey, + CIFS_CRYPTO_KEY_SIZE); + } else { + rc = -EIO; + goto neg_err_exit; + } + + cFYI(1,("LANMAN negotiated")); /* BB removeme BB */ + goto neg_err_exit; + } else if(pSMBr->hdr.WordCount != 17) { + /* unknown wct */ + rc = -EOPNOTSUPP; + goto neg_err_exit; + } + server->secMode = pSMBr->SecurityMode; if((server->secMode & SECMODE_USER) == 0) cFYI(1,("share mode security")); @@ -479,7 +554,7 @@ CIFSSMBNegotiate(unsigned int xid, struct cifsSesInfo *ses) } } - +neg_err_exit: cifs_buf_release(pSMB); return rc; } |