/*
* fs/cifs/cifsencrypt.c
*
- * Copyright (C) International Business Machines Corp., 2005
+ * Copyright (C) International Business Machines Corp., 2005,2006
* Author(s): Steve French (sfrench@us.ibm.com)
*
* This library is free software; you can redistribute it and/or modify
#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 */
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)
+static int cifs_calculate_signature(const struct smb_hdr * cifs_pdu,
+ const char * key, char * signature)
{
struct MD5Context context;
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;
int rc = 0;
char smb_signature[20];
- /* BB remember to initialize sequence number elsewhere and initialize mac_signing key elsewhere BB */
- /* BB remember to add code to save expected sequence number in midQ entry BB */
-
if((cifs_pdu == NULL) || (server == NULL))
return -EINVAL;
static int cifs_calc_signature2(const struct kvec * iov, int n_vec,
const char * key, char * signature)
{
- struct MD5Context context;
-
- if((iov == NULL) || (signature == NULL))
- return -EINVAL;
+ struct MD5Context context;
+ int i;
- MD5Init(&context);
- MD5Update(&context,key,CIFS_SESSION_KEY_SIZE+16);
+ if((iov == NULL) || (signature == NULL))
+ return -EINVAL;
-/* MD5Update(&context,cifs_pdu->Protocol,cifs_pdu->smb_buf_length); */ /* BB FIXME BB */
+ MD5Init(&context);
+ 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"));
+ return -EIO;
+ } else if(iov[i].iov_len == 0)
+ break; /* bail out if we are sent nothing to sign */
+ /* The first entry includes a length field (which does not get
+ signed that occupies the first 4 bytes before the header */
+ if(i==0) {
+ if (iov[0].iov_len <= 8 ) /* cmd field at offset 9 */
+ break; /* nothing to sign or corrupt header */
+ MD5Update(&context,iov[0].iov_base+4, iov[0].iov_len-4);
+ } else
+ MD5Update(&context,iov[i].iov_base, iov[i].iov_len);
+ }
- MD5Final(signature,&context);
+ MD5Final(signature,&context);
- return -EOPNOTSUPP;
-/* return 0; */
+ return 0;
}
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;
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;
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); */
}
git.openpandora.org / pandora-kernel.git / blobdiff