[CIFS] NTLM auth and sign - Use appropriate server challenge

Commit Message

Shirish Pargaonkar Oct. 27, 2010, 4:38 p.m. UTC

None

Patch

diff --git a/fs/cifs/cifsencrypt.c b/fs/cifs/cifsencrypt.c
index 17d603a..10d3d0f 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 67d6a22..7255657 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 e98f1f3..a32a42e 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 469c3dd..f8f1ec6 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 e0515a6..cbd3bf7 100644
--- a/fs/cifs/sess.c
+++ b/fs/cifs/sess.c
@@ -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);