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author | Steve French <sfrench@us.ibm.com> | 2006-06-08 05:41:32 (GMT) |
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committer | Steve French <sfrench@us.ibm.com> | 2006-06-08 05:41:32 (GMT) |
commit | 1717ffc58850dfa9e08b4977f8d0323cb3336863 (patch) | |
tree | 6528d6d355b1288fe4831cdff59671f6536b4b2b /fs/cifs/cifsencrypt.c | |
parent | f3ffb6814408f29817fc84d40ecc9c796acaa3ab (diff) | |
download | linux-1717ffc58850dfa9e08b4977f8d0323cb3336863.tar.xz |
[CIFS] NTLMv2 support part 5
NTLMv2 authentication (stronger authentication than default NTLM) which
many servers support now works. There was a problem with the construction
of the security blob in the older code. Currently requires
/proc/fs/cifs/Experimental to be set to 2
and
/proc/fs/cifs/SecurityFlags to be set to 0x4004 (to require using
NTLMv2 instead of default of NTLM)
Next we will check signing to make sure optional NTLMv2 packet signing also
works.
Signed-off-by: Steve French <sfrench@us.ibm.com>
Diffstat (limited to 'fs/cifs/cifsencrypt.c')
-rw-r--r-- | fs/cifs/cifsencrypt.c | 60 |
1 files changed, 41 insertions, 19 deletions
diff --git a/fs/cifs/cifsencrypt.c b/fs/cifs/cifsencrypt.c index 8bcb1da..a89efaf 100644 --- a/fs/cifs/cifsencrypt.c +++ b/fs/cifs/cifsencrypt.c @@ -212,7 +212,8 @@ int cifs_calculate_mac_key(char * key, const char * rn, const char * password) return 0; } -int CalcNTLMv2_partial_mac_key(struct cifsSesInfo * ses, struct nls_table * nls_info) +int CalcNTLMv2_partial_mac_key(struct cifsSesInfo * ses, + const struct nls_table * nls_info) { char temp_hash[16]; struct HMACMD5Context ctx; @@ -305,13 +306,15 @@ void calc_lanman_hash(struct cifsSesInfo * ses, char * lnm_session_key) } #endif /* CIFS_WEAK_PW_HASH */ -static int calc_ntlmv2_hash(const struct cifsSesInfo *ses, - char * ntv2_hash) +static int calc_ntlmv2_hash(struct cifsSesInfo *ses, + const struct nls_table * nls_cp) { int rc = 0; int len; char nt_hash[16]; struct HMACMD5Context * pctxt; + wchar_t * user; + wchar_t * domain; pctxt = kmalloc(sizeof(struct HMACMD5Context), GFP_KERNEL); @@ -321,26 +324,44 @@ static int calc_ntlmv2_hash(const struct cifsSesInfo *ses, /* calculate md4 hash of password */ E_md4hash(ses->password, nt_hash); - /* convERT Domainname to unicode and uppercase */ + /* convert Domainname to unicode and uppercase */ hmac_md5_init_limK_to_64(nt_hash, 16, pctxt); /* convert ses->userName to unicode and uppercase */ - - /* len = ... */ /* BB FIXME BB */ - - /* hmac_md5_update(user, len, pctxt); */ + len = strlen(ses->userName); + user = kmalloc(2 + (len * 2), GFP_KERNEL); + if(user == NULL) + goto calc_exit_2; + len = cifs_strtoUCS(user, ses->userName, len, nls_cp); + UniStrupr(user); + hmac_md5_update((char *)user, 2*len, pctxt); /* convert ses->domainName to unicode and uppercase */ + if(ses->domainName) { + len = strlen(ses->domainName); - /* len = ... */ /* BB FIXME BB */ - /* hmac_md5_update(domain, len, pctxt); */ + domain = kmalloc(2 + (len * 2), GFP_KERNEL); + if(domain == NULL) + goto calc_exit_1; + len = cifs_strtoUCS(domain, ses->domainName, len, nls_cp); + UniStrupr(domain); - hmac_md5_final(ntv2_hash, pctxt); + hmac_md5_update((char *)domain, 2*len, pctxt); + + kfree(domain); + } +calc_exit_1: + kfree(user); +calc_exit_2: + /* BB FIXME what about bytes 24 through 40 of the signing key? + compare with the NTLM example */ + hmac_md5_final(ses->server->mac_signing_key, pctxt); return rc; } -void setup_ntlmv2_rsp(const struct cifsSesInfo * ses, char * resp_buf) +void setup_ntlmv2_rsp(struct cifsSesInfo * ses, char * resp_buf, + const struct nls_table * nls_cp) { int rc; struct ntlmv2_resp * buf = (struct ntlmv2_resp *)resp_buf; @@ -348,27 +369,28 @@ void setup_ntlmv2_rsp(const struct cifsSesInfo * ses, char * resp_buf) buf->blob_signature = cpu_to_le32(0x00000101); buf->reserved = 0; buf->time = cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME)); - get_random_bytes(&buf->client_chal, sizeof(buf->client_chal)); + get_random_bytes(&buf->client_chal, sizeof(buf->client_chal)); buf->reserved2 = 0; buf->names[0].type = 0; buf->names[0].length = 0; /* calculate buf->ntlmv2_hash */ - rc = calc_ntlmv2_hash(ses,buf->ntlmv2_hash); + rc = calc_ntlmv2_hash(ses, nls_cp); if(rc) cERROR(1,("could not get v2 hash rc %d",rc)); + CalcNTLMv2_response(ses, resp_buf); } -void CalcNTLMv2_response(const struct cifsSesInfo * ses,char * v2_session_response) +void CalcNTLMv2_response(const struct cifsSesInfo * ses, char * v2_session_response) { struct HMACMD5Context context; + /* rest of v2 struct already generated */ memcpy(v2_session_response + 8, ses->server->cryptKey,8); - /* gen_blob(v2_session_response + 16); */ hmac_md5_init_limK_to_64(ses->server->mac_signing_key, 16, &context); - hmac_md5_update(ses->server->cryptKey,8,&context); -/* hmac_md5_update(v2_session_response+16)client thing,8,&context); */ /* BB fix */ + hmac_md5_update(v2_session_response+8, + sizeof(struct ntlmv2_resp) - 8, &context); hmac_md5_final(v2_session_response,&context); - cifs_dump_mem("v2_sess_rsp: ", v2_session_response, 32); /* BB removeme BB */ +/* cifs_dump_mem("v2_sess_rsp: ", v2_session_response, 32); */ } |