1 files changed, 131 insertions, 9 deletions

diff --git a/fs/cifs/cifsencrypt.c b/fs/cifs/cifsencrypt.c
index e7d63737e651..a89efaf78a26 100644
--- a/fs/cifs/cifsencrypt.c
+++ b/fs/cifs/cifsencrypt.c
@@ -26,6 +26,8 @@
 #include "md5.h"
 #include "cifs_unicode.h"
 #include "cifsproto.h"
+#include <linux/ctype.h>
+#include <linux/random.h>
 
 /* Calculate and return the CIFS signature based on the mac key and the smb pdu */
 /* the 16 byte signature must be allocated by the caller  */
@@ -35,6 +37,8 @@
 
 extern void mdfour(unsigned char *out, unsigned char *in, int n);
 extern void E_md4hash(const unsigned char *passwd, unsigned char *p16);
+extern void SMBencrypt(unsigned char *passwd, unsigned char *c8,
+                       unsigned char *p24);
         
 static int cifs_calculate_signature(const struct smb_hdr * cifs_pdu, 
                                     const char * key, char * signature)
@@ -45,7 +49,7 @@ static int cifs_calculate_signature(const struct smb_hdr * cifs_pdu,
                 return -EINVAL;
 
         MD5Init(&context);
-        MD5Update(&context,key,CIFS_SESSION_KEY_SIZE+16);
+        MD5Update(&context,key,CIFS_SESS_KEY_SIZE+16);
         MD5Update(&context,cifs_pdu->Protocol,cifs_pdu->smb_buf_length);
         MD5Final(signature,&context);
         return 0;
@@ -90,7 +94,7 @@ static int cifs_calc_signature2(const struct kvec * iov, int n_vec,
                 return -EINVAL;
 
         MD5Init(&context);
-        MD5Update(&context,key,CIFS_SESSION_KEY_SIZE+16);
+        MD5Update(&context,key,CIFS_SESS_KEY_SIZE+16);
         for(i=0;i<n_vec;i++) {
                 if(iov[i].iov_base == NULL) {
                         cERROR(1,("null iovec entry"));
@@ -204,11 +208,12 @@ int cifs_calculate_mac_key(char * key, const char * rn, const char * password)
 
         E_md4hash(password, temp_key);
         mdfour(key,temp_key,16);
-        memcpy(key+16,rn, CIFS_SESSION_KEY_SIZE);
+        memcpy(key+16,rn, CIFS_SESS_KEY_SIZE);
         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;
@@ -225,6 +230,8 @@ int CalcNTLMv2_partial_mac_key(struct cifsSesInfo * ses, struct nls_table * nls_
         user_name_len = strlen(ses->userName);
         if(user_name_len > MAX_USERNAME_SIZE)
                 return -EINVAL;
+        if(ses->domainName == NULL)
+                return -EINVAL; /* BB should we use CIFS_LINUX_DOM */
         dom_name_len = strlen(ses->domainName);
         if(dom_name_len > MAX_USERNAME_SIZE)
                 return -EINVAL;
@@ -259,16 +266,131 @@ int CalcNTLMv2_partial_mac_key(struct cifsSesInfo * ses, struct nls_table * nls_
         kfree(unicode_buf);
         return 0;
 }
-void CalcNTLMv2_response(const struct cifsSesInfo * ses,char * v2_session_response)
+
+#ifdef CONFIG_CIFS_WEAK_PW_HASH
+void calc_lanman_hash(struct cifsSesInfo * ses, char * lnm_session_key)
+{
+        int i;
+        char password_with_pad[CIFS_ENCPWD_SIZE];
+
+        if(ses->server == NULL)
+                return;
+
+        memset(password_with_pad, 0, CIFS_ENCPWD_SIZE);
+        strncpy(password_with_pad, ses->password, CIFS_ENCPWD_SIZE);
+
+        if((ses->server->secMode & SECMODE_PW_ENCRYPT) == 0)
+                if(extended_security & CIFSSEC_MAY_PLNTXT) {
+                        memcpy(lnm_session_key, password_with_pad, CIFS_ENCPWD_SIZE); 
+                        return;
+                }
+
+        /* calculate old style session key */
+        /* calling toupper is less broken than repeatedly
+        calling nls_toupper would be since that will never
+        work for UTF8, but neither handles multibyte code pages
+        but the only alternative would be converting to UCS-16 (Unicode)
+        (using a routine something like UniStrupr) then
+        uppercasing and then converting back from Unicode - which
+        would only worth doing it if we knew it were utf8. Basically
+        utf8 and other multibyte codepages each need their own strupper
+        function since a byte at a time will ont work. */
+
+        for(i = 0; i < CIFS_ENCPWD_SIZE; i++) {
+                password_with_pad[i] = toupper(password_with_pad[i]);
+        }
+
+        SMBencrypt(password_with_pad, ses->server->cryptKey, lnm_session_key);
+        /* clear password before we return/free memory */
+        memset(password_with_pad, 0, CIFS_ENCPWD_SIZE);
+}
+#endif /* CIFS_WEAK_PW_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);
+
+        if(pctxt == NULL)
+                return -ENOMEM;
+
+        /* calculate md4 hash of password */
+        E_md4hash(ses->password, nt_hash);
+
+        /* convert Domainname to unicode and uppercase */
+        hmac_md5_init_limK_to_64(nt_hash, 16, pctxt);
+
+        /* convert ses->userName to unicode and uppercase */
+        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);
+
+                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_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(struct cifsSesInfo * ses, char * resp_buf, 
+                      const struct nls_table * nls_cp)
+{
+        int rc;
+        struct ntlmv2_resp * buf = (struct ntlmv2_resp *)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));
+        buf->reserved2 = 0;
+        buf->names[0].type = 0;
+        buf->names[0].length = 0;
+
+        /* calculate 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)
 {
         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); */
 }