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authorShirish Pargaonkar <shirishpargaonkar@gmail.com>2010-10-27 15:20:36 -0500
committerSteve French <sfrench@us.ibm.com>2010-10-29 01:47:30 +0000
commitd3ba50b17aa7a391bb5b3dcd8d6ba7a02c4f031c (patch)
tree452ddaeb1d52387a852d0c3cf46c4253347d0a27 /fs/cifs
parent6b03590412c977ae8fa1635c9b80854ab19a5b78 (diff)
NTLM auth and sign - Use appropriate server challenge
Need to have cryptkey or server challenge in smb connection (struct TCP_Server_Info) for ntlm and ntlmv2 auth types for which cryptkey (Encryption Key) is supplied just once in Negotiate Protocol response during an smb connection setup for all the smb sessions over that smb connection. For ntlmssp, cryptkey or server challenge is provided for every smb session in type 2 packet of ntlmssp negotiation, the cryptkey provided during Negotiation Protocol response before smb connection does not count. Rename cryptKey to cryptkey and related changes. Signed-off-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
Diffstat (limited to 'fs/cifs')
-rw-r--r--fs/cifs/cifsencrypt.c10
-rw-r--r--fs/cifs/cifsglob.h3
-rw-r--r--fs/cifs/cifssmb.c4
-rw-r--r--fs/cifs/connect.c4
-rw-r--r--fs/cifs/sess.c12
5 files changed, 21 insertions, 12 deletions
diff --git a/fs/cifs/cifsencrypt.c b/fs/cifs/cifsencrypt.c
index 17d603ad5e3..ef95a272f73 100644
--- a/fs/cifs/cifsencrypt.c
+++ b/fs/cifs/cifsencrypt.c
@@ -249,7 +249,7 @@ int setup_ntlm_response(struct cifsSesInfo *ses)
}
ses->auth_key.len = temp_len;
- SMBNTencrypt(ses->password, ses->cryptKey,
+ SMBNTencrypt(ses->password, ses->server->cryptkey,
ses->auth_key.response + CIFS_SESS_KEY_SIZE);
E_md4hash(ses->password, temp_key);
@@ -537,8 +537,12 @@ CalcNTLMv2_response(const struct cifsSesInfo *ses)
return rc;
}
- memcpy(ses->auth_key.response + offset,
- ses->cryptKey, CIFS_SERVER_CHALLENGE_SIZE);
+ if (ses->server->secType == RawNTLMSSP)
+ memcpy(ses->auth_key.response + offset,
+ ses->cryptkey, CIFS_SERVER_CHALLENGE_SIZE);
+ else
+ memcpy(ses->auth_key.response + offset,
+ ses->server->cryptkey, CIFS_SERVER_CHALLENGE_SIZE);
crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash,
ses->auth_key.response + offset, ses->auth_key.len - offset);
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index 67d6a2280a0..b7369517646 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -196,6 +196,7 @@ struct TCP_Server_Info {
int capabilities; /* allow selective disabling of caps by smb sess */
int timeAdj; /* Adjust for difference in server time zone in sec */
__u16 CurrentMid; /* multiplex id - rotating counter */
+ char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
/* 16th byte of RFC1001 workstation name is always null */
char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
__u32 sequence_number; /* needed for CIFS PDU signature */
@@ -240,7 +241,7 @@ struct cifsSesInfo {
char userName[MAX_USERNAME_SIZE + 1];
char *domainName;
char *password;
- char cryptKey[CIFS_CRYPTO_KEY_SIZE];
+ char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */
struct session_key auth_key;
char ntlmv2_hash[16];
unsigned int tilen; /* length of the target info blob */
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index e98f1f317b1..2f2632b6df5 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -503,7 +503,7 @@ CIFSSMBNegotiate(unsigned int xid, struct cifsSesInfo *ses)
if (rsp->EncryptionKeyLength ==
cpu_to_le16(CIFS_CRYPTO_KEY_SIZE)) {
- memcpy(ses->cryptKey, rsp->EncryptionKey,
+ memcpy(ses->server->cryptkey, rsp->EncryptionKey,
CIFS_CRYPTO_KEY_SIZE);
} else if (server->secMode & SECMODE_PW_ENCRYPT) {
rc = -EIO; /* need cryptkey unless plain text */
@@ -574,7 +574,7 @@ CIFSSMBNegotiate(unsigned int xid, struct cifsSesInfo *ses)
server->timeAdj = (int)(__s16)le16_to_cpu(pSMBr->ServerTimeZone);
server->timeAdj *= 60;
if (pSMBr->EncryptionKeyLength == CIFS_CRYPTO_KEY_SIZE) {
- memcpy(ses->cryptKey, pSMBr->u.EncryptionKey,
+ memcpy(ses->server->cryptkey, pSMBr->u.EncryptionKey,
CIFS_CRYPTO_KEY_SIZE);
} else if ((pSMBr->hdr.Flags2 & SMBFLG2_EXT_SEC)
&& (pSMBr->EncryptionKeyLength == 0)) {
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 469c3ddba46..4d8004ce583 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -3002,13 +3002,13 @@ CIFSTCon(unsigned int xid, struct cifsSesInfo *ses,
#ifdef CONFIG_CIFS_WEAK_PW_HASH
if ((global_secflags & CIFSSEC_MAY_LANMAN) &&
(ses->server->secType == LANMAN))
- calc_lanman_hash(tcon->password, ses->cryptKey,
+ calc_lanman_hash(tcon->password, ses->server->cryptkey,
ses->server->secMode &
SECMODE_PW_ENCRYPT ? true : false,
bcc_ptr);
else
#endif /* CIFS_WEAK_PW_HASH */
- SMBNTencrypt(tcon->password, ses->cryptKey, bcc_ptr);
+ SMBNTencrypt(tcon->password, ses->server->cryptkey, bcc_ptr);
bcc_ptr += CIFS_SESS_KEY_SIZE;
if (ses->capabilities & CAP_UNICODE) {
diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c
index e0515a62715..f74c5a88dd4 100644
--- a/fs/cifs/sess.c
+++ b/fs/cifs/sess.c
@@ -399,7 +399,7 @@ static int decode_ntlmssp_challenge(char *bcc_ptr, int blob_len,
return -EINVAL;
}
- memcpy(ses->cryptKey, pblob->Challenge, CIFS_CRYPTO_KEY_SIZE);
+ memcpy(ses->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
@@ -667,10 +667,14 @@ ssetup_ntlmssp_authenticate:
/* no capabilities flags in old lanman negotiation */
pSMB->old_req.PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE);
- /* BB calculate hash with password */
- /* and copy into bcc */
- calc_lanman_hash(ses->password, ses->cryptKey,
+ /* Calculate hash with password and copy into bcc_ptr.
+ * Encryption Key (stored as in cryptkey) gets used if the
+ * security mode bit in Negottiate Protocol response states
+ * to use challenge/response method (i.e. Password bit is 1).
+ */
+
+ calc_lanman_hash(ses->password, ses->server->cryptkey,
ses->server->secMode & SECMODE_PW_ENCRYPT ?
true : false, lnm_session_key);