*/
#include <linux/fs.h>
+#include <linux/slab.h>
#include "cifspdu.h"
-#include "cifsglob.h"
+#include "cifsglob.h"
#include "cifs_debug.h"
#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 */
+/* Calculate and return the CIFS signature based on the mac key and SMB PDU */
/* the 16 byte signature must be allocated by the caller */
/* Note we only use the 1st eight bytes */
-/* Note that the smb header signature field on input contains the
+/* Note that the smb header signature field on input contains the
sequence number before this function is called */
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)
+extern void SMBencrypt(unsigned char *passwd, const unsigned char *c8,
+ unsigned char *p24);
+
+static int cifs_calculate_signature(const struct smb_hdr *cifs_pdu,
+ const struct mac_key *key, char *signature)
{
struct MD5Context context;
- if((cifs_pdu == NULL) || (signature == NULL))
+ if ((cifs_pdu == NULL) || (signature == NULL) || (key == NULL))
return -EINVAL;
- MD5Init(&context);
- MD5Update(&context,key,CIFS_SESS_KEY_SIZE+16);
- MD5Update(&context,cifs_pdu->Protocol,cifs_pdu->smb_buf_length);
- MD5Final(signature,&context);
+ cifs_MD5_init(&context);
+ cifs_MD5_update(&context, (char *)&key->data, key->len);
+ cifs_MD5_update(&context, cifs_pdu->Protocol, cifs_pdu->smb_buf_length);
+
+ cifs_MD5_final(signature, &context);
return 0;
}
-int cifs_sign_smb(struct smb_hdr * cifs_pdu, struct TCP_Server_Info * server,
- __u32 * pexpected_response_sequence_number)
+int cifs_sign_smb(struct smb_hdr *cifs_pdu, struct TCP_Server_Info *server,
+ __u32 *pexpected_response_sequence_number)
{
int rc = 0;
char smb_signature[20];
- if((cifs_pdu == NULL) || (server == NULL))
+ if ((cifs_pdu == NULL) || (server == NULL))
return -EINVAL;
- if((cifs_pdu->Flags2 & SMBFLG2_SECURITY_SIGNATURE) == 0)
+ if ((cifs_pdu->Flags2 & SMBFLG2_SECURITY_SIGNATURE) == 0)
return rc;
spin_lock(&GlobalMid_Lock);
- cifs_pdu->Signature.Sequence.SequenceNumber = cpu_to_le32(server->sequence_number);
+ cifs_pdu->Signature.Sequence.SequenceNumber =
+ cpu_to_le32(server->sequence_number);
cifs_pdu->Signature.Sequence.Reserved = 0;
-
+
*pexpected_response_sequence_number = server->sequence_number++;
server->sequence_number++;
spin_unlock(&GlobalMid_Lock);
- rc = cifs_calculate_signature(cifs_pdu, server->mac_signing_key,smb_signature);
- if(rc)
+ rc = cifs_calculate_signature(cifs_pdu, &server->mac_signing_key,
+ smb_signature);
+ if (rc)
memset(cifs_pdu->Signature.SecuritySignature, 0, 8);
else
memcpy(cifs_pdu->Signature.SecuritySignature, smb_signature, 8);
return rc;
}
-static int cifs_calc_signature2(const struct kvec * iov, int n_vec,
- const char * key, char * signature)
+static int cifs_calc_signature2(const struct kvec *iov, int n_vec,
+ const struct mac_key *key, char *signature)
{
struct MD5Context context;
int i;
- if((iov == NULL) || (signature == NULL))
+ if ((iov == NULL) || (signature == NULL) || (key == NULL))
return -EINVAL;
- 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"));
+ cifs_MD5_init(&context);
+ cifs_MD5_update(&context, (char *)&key->data, key->len);
+ for (i = 0; i < n_vec; i++) {
+ if (iov[i].iov_len == 0)
+ continue;
+ 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
+ }
+ /* 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 */
+ 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);
+ cifs_MD5_update(&context, iov[0].iov_base+4,
+ iov[0].iov_len-4);
} else
- MD5Update(&context,iov[i].iov_base, iov[i].iov_len);
+ cifs_MD5_update(&context, iov[i].iov_base, iov[i].iov_len);
}
- MD5Final(signature,&context);
+ cifs_MD5_final(signature, &context);
return 0;
}
-int cifs_sign_smb2(struct kvec * iov, int n_vec, struct TCP_Server_Info *server,
- __u32 * pexpected_response_sequence_number)
+int cifs_sign_smb2(struct kvec *iov, int n_vec, struct TCP_Server_Info *server,
+ __u32 *pexpected_response_sequence_number)
{
int rc = 0;
char smb_signature[20];
- struct smb_hdr * cifs_pdu = iov[0].iov_base;
+ struct smb_hdr *cifs_pdu = iov[0].iov_base;
- if((cifs_pdu == NULL) || (server == NULL))
+ if ((cifs_pdu == NULL) || (server == NULL))
return -EINVAL;
- if((cifs_pdu->Flags2 & SMBFLG2_SECURITY_SIGNATURE) == 0)
+ if ((cifs_pdu->Flags2 & SMBFLG2_SECURITY_SIGNATURE) == 0)
return rc;
- spin_lock(&GlobalMid_Lock);
- cifs_pdu->Signature.Sequence.SequenceNumber =
+ spin_lock(&GlobalMid_Lock);
+ cifs_pdu->Signature.Sequence.SequenceNumber =
cpu_to_le32(server->sequence_number);
- cifs_pdu->Signature.Sequence.Reserved = 0;
+ cifs_pdu->Signature.Sequence.Reserved = 0;
- *pexpected_response_sequence_number = server->sequence_number++;
- server->sequence_number++;
- spin_unlock(&GlobalMid_Lock);
+ *pexpected_response_sequence_number = server->sequence_number++;
+ server->sequence_number++;
+ spin_unlock(&GlobalMid_Lock);
- rc = cifs_calc_signature2(iov, n_vec, server->mac_signing_key,
+ rc = cifs_calc_signature2(iov, n_vec, &server->mac_signing_key,
smb_signature);
- if(rc)
- memset(cifs_pdu->Signature.SecuritySignature, 0, 8);
- else
- memcpy(cifs_pdu->Signature.SecuritySignature, smb_signature, 8);
-
- return rc;
+ if (rc)
+ memset(cifs_pdu->Signature.SecuritySignature, 0, 8);
+ else
+ memcpy(cifs_pdu->Signature.SecuritySignature, smb_signature, 8);
+ return rc;
}
-int cifs_verify_signature(struct smb_hdr * cifs_pdu, const char * mac_key,
- __u32 expected_sequence_number)
+int cifs_verify_signature(struct smb_hdr *cifs_pdu,
+ const struct mac_key *mac_key,
+ __u32 expected_sequence_number)
{
unsigned int rc;
char server_response_sig[8];
char what_we_think_sig_should_be[20];
- if((cifs_pdu == NULL) || (mac_key == NULL))
+ if ((cifs_pdu == NULL) || (mac_key == NULL))
return -EINVAL;
if (cifs_pdu->Command == SMB_COM_NEGOTIATE)
return 0;
if (cifs_pdu->Command == SMB_COM_LOCKING_ANDX) {
- struct smb_com_lock_req * pSMB = (struct smb_com_lock_req *)cifs_pdu;
- if(pSMB->LockType & LOCKING_ANDX_OPLOCK_RELEASE)
+ struct smb_com_lock_req *pSMB =
+ (struct smb_com_lock_req *)cifs_pdu;
+ if (pSMB->LockType & LOCKING_ANDX_OPLOCK_RELEASE)
return 0;
}
- /* BB what if signatures are supposed to be on for session but server does not
- send one? BB */
-
+ /* BB what if signatures are supposed to be on for session but
+ server does not send one? BB */
+
/* Do not need to verify session setups with signature "BSRSPYL " */
- if(memcmp(cifs_pdu->Signature.SecuritySignature,"BSRSPYL ",8)==0)
- cFYI(1,("dummy signature received for smb command 0x%x",cifs_pdu->Command));
+ if (memcmp(cifs_pdu->Signature.SecuritySignature, "BSRSPYL ", 8) == 0)
+ cFYI(1, "dummy signature received for smb command 0x%x",
+ cifs_pdu->Command);
/* save off the origiginal signature so we can modify the smb and check
its signature against what the server sent */
- memcpy(server_response_sig,cifs_pdu->Signature.SecuritySignature,8);
+ memcpy(server_response_sig, cifs_pdu->Signature.SecuritySignature, 8);
- cifs_pdu->Signature.Sequence.SequenceNumber = cpu_to_le32(expected_sequence_number);
+ cifs_pdu->Signature.Sequence.SequenceNumber =
+ cpu_to_le32(expected_sequence_number);
cifs_pdu->Signature.Sequence.Reserved = 0;
rc = cifs_calculate_signature(cifs_pdu, mac_key,
what_we_think_sig_should_be);
- if(rc)
+ if (rc)
return rc;
-
-/* cifs_dump_mem("what we think it should be: ",what_we_think_sig_should_be,16); */
+/* cifs_dump_mem("what we think it should be: ",
+ what_we_think_sig_should_be, 16); */
- if(memcmp(server_response_sig, what_we_think_sig_should_be, 8))
+ if (memcmp(server_response_sig, what_we_think_sig_should_be, 8))
return -EACCES;
else
return 0;
}
/* We fill in key by putting in 40 byte array which was allocated by caller */
-int cifs_calculate_mac_key(char * key, const char * rn, const char * password)
+int cifs_calculate_mac_key(struct mac_key *key, const char *rn,
+ const char *password)
{
char temp_key[16];
if ((key == NULL) || (rn == NULL))
return -EINVAL;
E_md4hash(password, temp_key);
- mdfour(key,temp_key,16);
- memcpy(key+16,rn, CIFS_SESS_KEY_SIZE);
+ mdfour(key->data.ntlm, temp_key, 16);
+ memcpy(key->data.ntlm+16, rn, CIFS_SESS_KEY_SIZE);
+ key->len = 40;
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;
- char * ucase_buf;
- __le16 * unicode_buf;
- unsigned int i,user_name_len,dom_name_len;
+ char *ucase_buf;
+ __le16 *unicode_buf;
+ unsigned int i, user_name_len, dom_name_len;
- if(ses == NULL)
+ if (ses == NULL)
return -EINVAL;
E_md4hash(ses->password, temp_hash);
hmac_md5_init_limK_to_64(temp_hash, 16, &ctx);
user_name_len = strlen(ses->userName);
- if(user_name_len > MAX_USERNAME_SIZE)
+ if (user_name_len > MAX_USERNAME_SIZE)
return -EINVAL;
- if(ses->domainName == NULL)
+ 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)
+ if (dom_name_len > MAX_USERNAME_SIZE)
return -EINVAL;
-
+
ucase_buf = kmalloc((MAX_USERNAME_SIZE+1), GFP_KERNEL);
- if(ucase_buf == NULL)
+ if (ucase_buf == NULL)
return -ENOMEM;
unicode_buf = kmalloc((MAX_USERNAME_SIZE+1)*4, GFP_KERNEL);
- if(unicode_buf == NULL) {
+ if (unicode_buf == NULL) {
kfree(ucase_buf);
return -ENOMEM;
}
-
- for(i=0;i<user_name_len;i++)
+
+ for (i = 0; i < user_name_len; i++)
ucase_buf[i] = nls_info->charset2upper[(int)ses->userName[i]];
ucase_buf[i] = 0;
- user_name_len = cifs_strtoUCS(unicode_buf, ucase_buf, MAX_USERNAME_SIZE*2, nls_info);
+ user_name_len = cifs_strtoUCS(unicode_buf, ucase_buf,
+ MAX_USERNAME_SIZE*2, nls_info);
unicode_buf[user_name_len] = 0;
user_name_len++;
- for(i=0;i<dom_name_len;i++)
+ for (i = 0; i < dom_name_len; i++)
ucase_buf[i] = nls_info->charset2upper[(int)ses->domainName[i]];
ucase_buf[i] = 0;
- dom_name_len = cifs_strtoUCS(unicode_buf+user_name_len, ucase_buf, MAX_USERNAME_SIZE*2, nls_info);
+ dom_name_len = cifs_strtoUCS(unicode_buf+user_name_len, ucase_buf,
+ MAX_USERNAME_SIZE*2, nls_info);
unicode_buf[user_name_len + dom_name_len] = 0;
hmac_md5_update((const unsigned char *) unicode_buf,
- (user_name_len+dom_name_len)*2,&ctx);
+ (user_name_len+dom_name_len)*2, &ctx);
- hmac_md5_final(ses->server->mac_signing_key,&ctx);
+ hmac_md5_final(ses->server->ntlmv2_hash, &ctx);
kfree(ucase_buf);
kfree(unicode_buf);
return 0;
}
#ifdef CONFIG_CIFS_WEAK_PW_HASH
-void calc_lanman_hash(struct cifsSesInfo * ses, char * lnm_session_key)
+void calc_lanman_hash(const char *password, const char *cryptkey, bool encrypt,
+ 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 (password)
+ strncpy(password_with_pad, 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;
- }
+ if (!encrypt && extended_security & CIFSSEC_MAY_PLNTXT) {
+ memset(lnm_session_key, 0, CIFS_SESS_KEY_SIZE);
+ memcpy(lnm_session_key, password_with_pad,
+ CIFS_ENCPWD_SIZE);
+ return;
+ }
/* calculate old style session key */
/* calling toupper is less broken than repeatedly
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++) {
+ 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);
+ SMBencrypt(password_with_pad, cryptkey, lnm_session_key);
+
/* clear password before we return/free memory */
memset(password_with_pad, 0, CIFS_ENCPWD_SIZE);
}
#endif /* CIFS_WEAK_PW_HASH */
-void CalcNTLMv2_response(const struct cifsSesInfo * ses,char * v2_session_response)
+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((__le16 *)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((__le16 *)domain, ses->domainName, len,
+ nls_cp);
+ /* the following line was removed since it didn't work well
+ with lower cased domain name that passed as an option.
+ Maybe converting the domain name earlier makes sense */
+ /* 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->ntlmv2_hash, pctxt);
+
+ kfree(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;
+ struct HMACMD5Context context;
+
+ 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 = cpu_to_le16(NTLMSSP_DOMAIN_TYPE);
+ buf->names[0].length = 0;
+ buf->names[1].type = 0;
+ buf->names[1].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);
+
+ /* now calculate the MAC key for NTLMv2 */
+ hmac_md5_init_limK_to_64(ses->server->ntlmv2_hash, 16, &context);
+ hmac_md5_update(resp_buf, 16, &context);
+ hmac_md5_final(ses->server->mac_signing_key.data.ntlmv2.key, &context);
+
+ memcpy(&ses->server->mac_signing_key.data.ntlmv2.resp, resp_buf,
+ sizeof(struct ntlmv2_resp));
+ ses->server->mac_signing_key.len = 16 + sizeof(struct ntlmv2_resp);
+}
+
+void CalcNTLMv2_response(const struct cifsSesInfo *ses,
+ char *v2_session_response)
{
struct HMACMD5Context context;
- 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);
+ /* rest of v2 struct already generated */
+ memcpy(v2_session_response + 8, ses->server->cryptKey, 8);
+ hmac_md5_init_limK_to_64(ses->server->ntlmv2_hash, 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 */
+ hmac_md5_final(v2_session_response, &context);
+/* cifs_dump_mem("v2_sess_rsp: ", v2_session_response, 32); */
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff