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| author | Shirish Pargaonkar <shirishpargaonkar@gmail.com> | 2010-10-28 16:53:07 +0200 |
|---|---|---|
| committer | Steve French <sfrench@us.ibm.com> | 2010-10-29 03:47:33 +0200 |
| commit | d3686d54c7902a303bd65d751226aa1647319863 (patch) | |
| tree | b4acd7dfc6c5ec2f254608a2f0ef11ef274861b8 /fs/cifs/sess.c | |
| parent | NTLM auth and sign - Use appropriate server challenge (diff) | |
| download | linux-d3686d54c7902a303bd65d751226aa1647319863.tar.xz linux-d3686d54c7902a303bd65d751226aa1647319863.zip | |
cifs: Cleanup and thus reduce smb session structure and fields used during authentication
Removed following fields from smb session structure
cryptkey, ntlmv2_hash, tilen, tiblob
and ntlmssp_auth structure is allocated dynamically only if the auth mech
in NTLMSSP.
response field within a session_key structure is used to initially store the
target info (either plucked from type 2 challenge packet in case of NTLMSSP
or fabricated in case of NTLMv2 without extended security) and then to store
Message Authentication Key (mak) (session key + client response).
Server challenge or cryptkey needed during a NTLMSSP authentication
is now part of ntlmssp_auth structure which gets allocated and freed
once authenticaiton process is done.
Signed-off-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
Diffstat (limited to 'fs/cifs/sess.c')
| -rw-r--r-- | fs/cifs/sess.c | 29 |
1 files changed, 18 insertions, 11 deletions
diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c index f74c5a88dd4c..7b01d3f6eed6 100644 --- a/fs/cifs/sess.c +++ b/fs/cifs/sess.c @@ -399,23 +399,22 @@ static int decode_ntlmssp_challenge(char *bcc_ptr, int blob_len, return -EINVAL; } - memcpy(ses->cryptkey, pblob->Challenge, CIFS_CRYPTO_KEY_SIZE); + memcpy(ses->ntlmssp->cryptkey, pblob->Challenge, CIFS_CRYPTO_KEY_SIZE); /* BB we could decode pblob->NegotiateFlags; some may be useful */ /* In particular we can examine sign flags */ /* BB spec says that if AvId field of MsvAvTimestamp is populated then we must set the MIC field of the AUTHENTICATE_MESSAGE */ - ses->ntlmssp.server_flags = le32_to_cpu(pblob->NegotiateFlags); + ses->ntlmssp->server_flags = le32_to_cpu(pblob->NegotiateFlags); tioffset = cpu_to_le16(pblob->TargetInfoArray.BufferOffset); tilen = cpu_to_le16(pblob->TargetInfoArray.Length); - ses->tilen = tilen; - if (ses->tilen) { - ses->tiblob = kmalloc(tilen, GFP_KERNEL); - if (!ses->tiblob) { + if (tilen) { + ses->auth_key.response = kmalloc(tilen, GFP_KERNEL); + if (!ses->auth_key.response) { cERROR(1, "Challenge target info allocation failure"); - ses->tilen = 0; return -ENOMEM; } - memcpy(ses->tiblob, bcc_ptr + tioffset, ses->tilen); + memcpy(ses->auth_key.response, bcc_ptr + tioffset, tilen); + ses->auth_key.len = tilen; } return 0; @@ -545,9 +544,9 @@ static int build_ntlmssp_auth_blob(unsigned char *pbuffer, sec_blob->WorkstationName.MaximumLength = 0; tmp += 2; - if ((ses->ntlmssp.server_flags & NTLMSSP_NEGOTIATE_KEY_XCH) && + if ((ses->ntlmssp->server_flags & NTLMSSP_NEGOTIATE_KEY_XCH) && !calc_seckey(ses)) { - memcpy(tmp, ses->ntlmssp.ciphertext, CIFS_CPHTXT_SIZE); + memcpy(tmp, ses->ntlmssp->ciphertext, CIFS_CPHTXT_SIZE); sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - pbuffer); sec_blob->SessionKey.Length = cpu_to_le16(CIFS_CPHTXT_SIZE); sec_blob->SessionKey.MaximumLength = @@ -601,8 +600,16 @@ CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses, return -EINVAL; type = ses->server->secType; - cFYI(1, "sess setup type %d", type); + if (type == RawNTLMSSP) { + /* if memory allocation is successful, caller of this function + * frees it. + */ + ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL); + if (!ses->ntlmssp) + return -ENOMEM; + } + ssetup_ntlmssp_authenticate: if (phase == NtLmChallenge) phase = NtLmAuthenticate; /* if ntlmssp, now final phase */ |