-/*
+/*
Unix SMB/Netbios implementation.
Version 3.0
handle NLTMSSP, server side
*/
#include "includes.h"
+#include "../libcli/auth/ntlmssp.h"
+#include "../libcli/auth/ntlmssp_private.h"
#include "../libcli/auth/libcli_auth.h"
+#include "../librpc/gen_ndr/ndr_ntlmssp.h"
+#include "../libcli/auth/ntlmssp_ndr.h"
+#include "../lib/crypto/md5.h"
+#include "../lib/crypto/arcfour.h"
+#include "../lib/crypto/hmacmd5.h"
-static NTSTATUS ntlmssp_client_initial(struct ntlmssp_state *ntlmssp_state,
+static NTSTATUS ntlmssp_client_initial(struct ntlmssp_state *ntlmssp_state,
DATA_BLOB reply, DATA_BLOB *next_request);
static NTSTATUS ntlmssp_server_negotiate(struct ntlmssp_state *ntlmssp_state,
const DATA_BLOB in, DATA_BLOB *out);
-static NTSTATUS ntlmssp_client_challenge(struct ntlmssp_state *ntlmssp_state,
+static NTSTATUS ntlmssp_client_challenge(struct ntlmssp_state *ntlmssp_state,
const DATA_BLOB reply, DATA_BLOB *next_request);
static NTSTATUS ntlmssp_server_auth(struct ntlmssp_state *ntlmssp_state,
const DATA_BLOB request, DATA_BLOB *reply);
/**
* Callbacks for NTLMSSP - for both client and server operating modes
- *
+ *
*/
static const struct ntlmssp_callbacks {
- enum NTLMSSP_ROLE role;
- enum NTLM_MESSAGE_TYPE ntlmssp_command;
- NTSTATUS (*fn)(struct ntlmssp_state *ntlmssp_state,
+ enum ntlmssp_role role;
+ enum ntlmssp_message_type ntlmssp_command;
+ NTSTATUS (*fn)(struct ntlmssp_state *ntlmssp_state,
DATA_BLOB in, DATA_BLOB *out);
} ntlmssp_callbacks[] = {
{NTLMSSP_CLIENT, NTLMSSP_INITIAL, ntlmssp_client_initial},
};
-/**
- * Print out the NTLMSSP flags for debugging
- * @param neg_flags The flags from the packet
- */
-
-void debug_ntlmssp_flags(uint32 neg_flags)
-{
- DEBUG(3,("Got NTLMSSP neg_flags=0x%08x\n", neg_flags));
-
- if (neg_flags & NTLMSSP_NEGOTIATE_UNICODE)
- DEBUGADD(4, (" NTLMSSP_NEGOTIATE_UNICODE\n"));
- if (neg_flags & NTLMSSP_NEGOTIATE_OEM)
- DEBUGADD(4, (" NTLMSSP_NEGOTIATE_OEM\n"));
- if (neg_flags & NTLMSSP_REQUEST_TARGET)
- DEBUGADD(4, (" NTLMSSP_REQUEST_TARGET\n"));
- if (neg_flags & NTLMSSP_NEGOTIATE_SIGN)
- DEBUGADD(4, (" NTLMSSP_NEGOTIATE_SIGN\n"));
- if (neg_flags & NTLMSSP_NEGOTIATE_SEAL)
- DEBUGADD(4, (" NTLMSSP_NEGOTIATE_SEAL\n"));
- if (neg_flags & NTLMSSP_NEGOTIATE_DATAGRAM_STYLE)
- DEBUGADD(4, (" NTLMSSP_NEGOTIATE_DATAGRAM_STYLE\n"));
- if (neg_flags & NTLMSSP_NEGOTIATE_LM_KEY)
- DEBUGADD(4, (" NTLMSSP_NEGOTIATE_LM_KEY\n"));
- if (neg_flags & NTLMSSP_NEGOTIATE_NETWARE)
- DEBUGADD(4, (" NTLMSSP_NEGOTIATE_NETWARE\n"));
- if (neg_flags & NTLMSSP_NEGOTIATE_NTLM)
- DEBUGADD(4, (" NTLMSSP_NEGOTIATE_NTLM\n"));
- if (neg_flags & NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED)
- DEBUGADD(4, (" NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED\n"));
- if (neg_flags & NTLMSSP_NEGOTIATE_WORKSTATION_SUPPLIED)
- DEBUGADD(4, (" NTLMSSP_NEGOTIATE_WORKSTATION_SUPPLIED\n"));
- if (neg_flags & NTLMSSP_NEGOTIATE_THIS_IS_LOCAL_CALL)
- DEBUGADD(4, (" NTLMSSP_NEGOTIATE_THIS_IS_LOCAL_CALL\n"));
- if (neg_flags & NTLMSSP_NEGOTIATE_ALWAYS_SIGN)
- DEBUGADD(4, (" NTLMSSP_NEGOTIATE_ALWAYS_SIGN\n"));
- if (neg_flags & NTLMSSP_CHAL_ACCEPT_RESPONSE)
- DEBUGADD(4, (" NTLMSSP_CHAL_ACCEPT_RESPONSE\n"));
- if (neg_flags & NTLMSSP_CHAL_NON_NT_SESSION_KEY)
- DEBUGADD(4, (" NTLMSSP_CHAL_NON_NT_SESSION_KEY\n"));
- if (neg_flags & NTLMSSP_NEGOTIATE_NTLM2)
- DEBUGADD(4, (" NTLMSSP_NEGOTIATE_NTLM2\n"));
- if (neg_flags & NTLMSSP_CHAL_TARGET_INFO)
- DEBUGADD(4, (" NTLMSSP_CHAL_TARGET_INFO\n"));
- if (neg_flags & NTLMSSP_NEGOTIATE_VERSION)
- DEBUGADD(4, (" NTLMSSP_NEGOTIATE_VERSION\n"));
- if (neg_flags & NTLMSSP_NEGOTIATE_128)
- DEBUGADD(4, (" NTLMSSP_NEGOTIATE_128\n"));
- if (neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH)
- DEBUGADD(4, (" NTLMSSP_NEGOTIATE_KEY_EXCH\n"));
- if (neg_flags & NTLMSSP_NEGOTIATE_56)
- DEBUGADD(4, (" NTLMSSP_NEGOTIATE_56\n"));
-}
-
/**
* Default challenge generation code.
*
*/
-static void get_challenge(const struct ntlmssp_state *ntlmssp_state,
- uint8_t chal[8])
+static NTSTATUS get_challenge(const struct ntlmssp_state *ntlmssp_state,
+ uint8_t chal[8])
{
generate_random_buffer(chal, 8);
+ return NT_STATUS_OK;
}
/**
return NT_STATUS_OK;
}
-/**
- * Set a username on an NTLMSSP context - ensures it is talloc()ed
+/**
+ * Set a username on an NTLMSSP context - ensures it is talloc()ed
*
*/
-NTSTATUS ntlmssp_set_username(NTLMSSP_STATE *ntlmssp_state, const char *user)
+NTSTATUS ntlmssp_set_username(struct ntlmssp_state *ntlmssp_state, const char *user)
{
ntlmssp_state->user = talloc_strdup(ntlmssp_state, user ? user : "" );
if (!ntlmssp_state->user) {
return NT_STATUS_OK;
}
-/**
- * Store NT and LM hashes on an NTLMSSP context - ensures they are talloc()ed
+/**
+ * Store NT and LM hashes on an NTLMSSP context - ensures they are talloc()ed
*
*/
-NTSTATUS ntlmssp_set_hashes(NTLMSSP_STATE *ntlmssp_state,
- const unsigned char lm_hash[16],
- const unsigned char nt_hash[16])
+NTSTATUS ntlmssp_set_hashes(struct ntlmssp_state *ntlmssp_state,
+ const uint8_t lm_hash[16],
+ const uint8_t nt_hash[16])
{
- ntlmssp_state->lm_hash = (unsigned char *)
+ ntlmssp_state->lm_hash = (uint8_t *)
TALLOC_MEMDUP(ntlmssp_state, lm_hash, 16);
- ntlmssp_state->nt_hash = (unsigned char *)
+ ntlmssp_state->nt_hash = (uint8_t *)
TALLOC_MEMDUP(ntlmssp_state, nt_hash, 16);
if (!ntlmssp_state->lm_hash || !ntlmssp_state->nt_hash) {
TALLOC_FREE(ntlmssp_state->lm_hash);
return NT_STATUS_OK;
}
-/**
+/**
* Converts a password to the hashes on an NTLMSSP context.
*
*/
-NTSTATUS ntlmssp_set_password(NTLMSSP_STATE *ntlmssp_state, const char *password)
+NTSTATUS ntlmssp_set_password(struct ntlmssp_state *ntlmssp_state, const char *password)
{
if (!password) {
ntlmssp_state->lm_hash = NULL;
ntlmssp_state->nt_hash = NULL;
} else {
- unsigned char lm_hash[16];
- unsigned char nt_hash[16];
+ uint8_t lm_hash[16];
+ uint8_t nt_hash[16];
E_deshash(password, lm_hash);
E_md4hash(password, nt_hash);
return NT_STATUS_OK;
}
-/**
- * Set a domain on an NTLMSSP context - ensures it is talloc()ed
+/**
+ * Set a domain on an NTLMSSP context - ensures it is talloc()ed
*
*/
-NTSTATUS ntlmssp_set_domain(NTLMSSP_STATE *ntlmssp_state, const char *domain)
+NTSTATUS ntlmssp_set_domain(struct ntlmssp_state *ntlmssp_state, const char *domain)
{
ntlmssp_state->domain = talloc_strdup(ntlmssp_state,
domain ? domain : "" );
return NT_STATUS_OK;
}
-/**
- * Set a workstation on an NTLMSSP context - ensures it is talloc()ed
- *
- */
-NTSTATUS ntlmssp_set_workstation(NTLMSSP_STATE *ntlmssp_state, const char *workstation)
-{
- ntlmssp_state->workstation = talloc_strdup(ntlmssp_state, workstation);
- if (!ntlmssp_state->workstation) {
- return NT_STATUS_NO_MEMORY;
- }
- return NT_STATUS_OK;
-}
-
-/**
- * Store a DATA_BLOB containing an NTLMSSP response, for use later.
- * This copies the data blob
- */
-
-NTSTATUS ntlmssp_store_response(NTLMSSP_STATE *ntlmssp_state,
- DATA_BLOB response)
-{
- ntlmssp_state->stored_response = data_blob_talloc(ntlmssp_state,
- response.data,
- response.length);
- return NT_STATUS_OK;
-}
-
/**
* Request features for the NTLMSSP negotiation
*
* @param ntlmssp_state NTLMSSP state
* @param feature_list List of space seperated features requested from NTLMSSP.
*/
-void ntlmssp_want_feature_list(NTLMSSP_STATE *ntlmssp_state, char *feature_list)
+void ntlmssp_want_feature_list(struct ntlmssp_state *ntlmssp_state, char *feature_list)
{
/*
* We need to set this to allow a later SetPassword
if(in_list("NTLMSSP_FEATURE_SEAL", feature_list, True)) {
ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SEAL;
}
+ if (in_list("NTLMSSP_FEATURE_CCACHE", feature_list, true)) {
+ ntlmssp_state->use_ccache = true;
+ }
}
/**
* @param ntlmssp_state NTLMSSP state
* @param feature Bit flag specifying the requested feature
*/
-void ntlmssp_want_feature(NTLMSSP_STATE *ntlmssp_state, uint32 feature)
+void ntlmssp_want_feature(struct ntlmssp_state *ntlmssp_state, uint32_t feature)
{
/* As per JRA's comment above */
if (feature & NTLMSSP_FEATURE_SESSION_KEY) {
if (feature & NTLMSSP_FEATURE_SEAL) {
ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SEAL;
}
+ if (feature & NTLMSSP_FEATURE_CCACHE) {
+ ntlmssp_state->use_ccache = true;
+ }
}
/**
* Next state function for the NTLMSSP state machine
- *
+ *
* @param ntlmssp_state NTLMSSP State
* @param in The packet in from the NTLMSSP partner, as a DATA_BLOB
* @param out The reply, as an allocated DATA_BLOB, caller to free.
- * @return Errors, NT_STATUS_MORE_PROCESSING_REQUIRED or NT_STATUS_OK.
+ * @return Errors, NT_STATUS_MORE_PROCESSING_REQUIRED or NT_STATUS_OK.
*/
-NTSTATUS ntlmssp_update(NTLMSSP_STATE *ntlmssp_state,
- const DATA_BLOB in, DATA_BLOB *out)
+NTSTATUS ntlmssp_update(struct ntlmssp_state *ntlmssp_state,
+ const DATA_BLOB input, DATA_BLOB *out)
{
- DATA_BLOB input;
- uint32 ntlmssp_command;
+ uint32_t ntlmssp_command;
int i;
if (ntlmssp_state->expected_state == NTLMSSP_DONE) {
*out = data_blob_null;
- if (!in.length && ntlmssp_state->stored_response.length) {
- input = ntlmssp_state->stored_response;
-
- /* we only want to read the stored response once - overwrite it */
- ntlmssp_state->stored_response = data_blob_null;
- } else {
- input = in;
- }
-
if (!input.length) {
switch (ntlmssp_state->role) {
case NTLMSSP_CLIENT:
}
for (i=0; ntlmssp_callbacks[i].fn; i++) {
- if (ntlmssp_callbacks[i].role == ntlmssp_state->role
+ if (ntlmssp_callbacks[i].role == ntlmssp_state->role
&& ntlmssp_callbacks[i].ntlmssp_command == ntlmssp_command) {
return ntlmssp_callbacks[i].fn(ntlmssp_state, input, out);
}
}
- DEBUG(1, ("failed to find NTLMSSP callback for NTLMSSP mode %u, command %u\n",
- ntlmssp_state->role, ntlmssp_command));
+ DEBUG(1, ("failed to find NTLMSSP callback for NTLMSSP mode %u, command %u\n",
+ ntlmssp_state->role, ntlmssp_command));
return NT_STATUS_INVALID_PARAMETER;
}
/**
* End an NTLMSSP state machine
- *
+ *
* @param ntlmssp_state NTLMSSP State, free()ed by this function
*/
-void ntlmssp_end(NTLMSSP_STATE **ntlmssp_state)
+void ntlmssp_end(struct ntlmssp_state **ntlmssp_state)
{
- (*ntlmssp_state)->ref_count--;
-
- if ((*ntlmssp_state)->ref_count == 0) {
- data_blob_free(&(*ntlmssp_state)->chal);
- data_blob_free(&(*ntlmssp_state)->lm_resp);
- data_blob_free(&(*ntlmssp_state)->nt_resp);
- TALLOC_FREE(*ntlmssp_state);
- }
+ data_blob_free(&(*ntlmssp_state)->chal);
+ data_blob_free(&(*ntlmssp_state)->lm_resp);
+ data_blob_free(&(*ntlmssp_state)->nt_resp);
+ TALLOC_FREE(*ntlmssp_state);
*ntlmssp_state = NULL;
return;
}
/**
- * Determine correct target name flags for reply, given server role
+ * Determine correct target name flags for reply, given server role
* and negotiated flags
- *
+ *
* @param ntlmssp_state NTLMSSP State
* @param neg_flags The flags from the packet
* @param chal_flags The flags to be set in the reply packet
*/
static const char *ntlmssp_target_name(struct ntlmssp_state *ntlmssp_state,
- uint32 neg_flags, uint32 *chal_flags)
+ uint32_t neg_flags, uint32_t *chal_flags)
{
if (neg_flags & NTLMSSP_REQUEST_TARGET) {
- *chal_flags |= NTLMSSP_CHAL_TARGET_INFO;
+ *chal_flags |= NTLMSSP_NEGOTIATE_TARGET_INFO;
*chal_flags |= NTLMSSP_REQUEST_TARGET;
- if (ntlmssp_state->server_role == ROLE_STANDALONE) {
+ if (ntlmssp_state->server.is_standalone) {
*chal_flags |= NTLMSSP_TARGET_TYPE_SERVER;
- return ntlmssp_state->get_global_myname();
+ return ntlmssp_state->server.netbios_name;
} else {
*chal_flags |= NTLMSSP_TARGET_TYPE_DOMAIN;
- return ntlmssp_state->get_domain();
+ return ntlmssp_state->server.netbios_domain;
};
} else {
return "";
}
static void ntlmssp_handle_neg_flags(struct ntlmssp_state *ntlmssp_state,
- uint32 neg_flags, bool allow_lm) {
+ uint32_t neg_flags, bool allow_lm) {
if (neg_flags & NTLMSSP_NEGOTIATE_UNICODE) {
ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_UNICODE;
ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_OEM;
}
}
-/**
- Weaken NTLMSSP keys to cope with down-level clients and servers.
-
- We probably should have some parameters to control this, but as
- it only occours for LM_KEY connections, and this is controlled
- by the client lanman auth/lanman auth parameters, it isn't too bad.
-*/
-
-DATA_BLOB ntlmssp_weaken_keys(NTLMSSP_STATE *ntlmssp_state, TALLOC_CTX *mem_ctx)
-{
- DATA_BLOB weakened_key = data_blob_talloc(mem_ctx,
- ntlmssp_state->session_key.data,
- ntlmssp_state->session_key.length);
-
- /* Nothing to weaken. We certainly don't want to 'extend' the length... */
- if (weakened_key.length < 16) {
- /* perhaps there was no key? */
- return weakened_key;
- }
-
- /* Key weakening not performed on the master key for NTLM2
- and does not occour for NTLM1. Therefore we only need
- to do this for the LM_KEY.
- */
-
- if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_LM_KEY) {
- /* LM key doesn't support 128 bit crypto, so this is
- * the best we can do. If you negotiate 128 bit, but
- * not 56, you end up with 40 bit... */
- if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_56) {
- weakened_key.data[7] = 0xa0;
- } else { /* forty bits */
- weakened_key.data[5] = 0xe5;
- weakened_key.data[6] = 0x38;
- weakened_key.data[7] = 0xb0;
- }
- weakened_key.length = 8;
- }
- return weakened_key;
-}
-
/**
* Next state function for the Negotiate packet
*
*/
static NTSTATUS ntlmssp_server_negotiate(struct ntlmssp_state *ntlmssp_state,
- const DATA_BLOB request, DATA_BLOB *reply)
+ const DATA_BLOB request, DATA_BLOB *reply)
{
DATA_BLOB struct_blob;
- const char *dnsname;
- char *dnsdomname = NULL;
- uint32 neg_flags = 0;
- uint32 ntlmssp_command, chal_flags;
+ uint32_t neg_flags = 0;
+ uint32_t ntlmssp_command, chal_flags;
uint8_t cryptkey[8];
const char *target_name;
+ struct NEGOTIATE_MESSAGE negotiate;
+ struct CHALLENGE_MESSAGE challenge;
+ NTSTATUS status;
/* parse the NTLMSSP packet */
#if 0
return NT_STATUS_INVALID_PARAMETER;
}
debug_ntlmssp_flags(neg_flags);
+
+ if (DEBUGLEVEL >= 10) {
+ if (NT_STATUS_IS_OK(ntlmssp_pull_NEGOTIATE_MESSAGE(&request,
+ ntlmssp_state,
+ &negotiate)))
+ {
+ NDR_PRINT_DEBUG(NEGOTIATE_MESSAGE, &negotiate);
+ }
+ }
}
ntlmssp_handle_neg_flags(ntlmssp_state, neg_flags, lp_lanman_auth());
/* Ask our caller what challenge they would like in the packet */
- ntlmssp_state->get_challenge(ntlmssp_state, cryptkey);
+ status = ntlmssp_state->get_challenge(ntlmssp_state, cryptkey);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
/* Check if we may set the challenge */
if (!ntlmssp_state->may_set_challenge(ntlmssp_state)) {
ntlmssp_state->internal_chal = data_blob_talloc(ntlmssp_state,
cryptkey, 8);
- /* This should be a 'netbios domain -> DNS domain' mapping */
- dnsdomname = get_mydnsdomname(ntlmssp_state);
- if (!dnsdomname) {
- dnsdomname = talloc_strdup(ntlmssp_state, "");
- }
- if (!dnsdomname) {
- return NT_STATUS_NO_MEMORY;
- }
- strlower_m(dnsdomname);
-
- dnsname = get_mydnsfullname();
- if (!dnsname) {
- dnsname = "";
- }
-
/* This creates the 'blob' of names that appears at the end of the packet */
- if (chal_flags & NTLMSSP_CHAL_TARGET_INFO)
+ if (chal_flags & NTLMSSP_NEGOTIATE_TARGET_INFO)
{
msrpc_gen(ntlmssp_state, &struct_blob, "aaaaa",
- NTLMSSP_NAME_TYPE_DOMAIN, target_name,
- NTLMSSP_NAME_TYPE_SERVER, ntlmssp_state->get_global_myname(),
- NTLMSSP_NAME_TYPE_DOMAIN_DNS, dnsdomname,
- NTLMSSP_NAME_TYPE_SERVER_DNS, dnsname,
- 0, "");
+ MsvAvNbDomainName, target_name,
+ MsvAvNbComputerName, ntlmssp_state->server.netbios_name,
+ MsvAvDnsDomainName, ntlmssp_state->server.dns_domain,
+ MsvAvDnsComputerName, ntlmssp_state->server.dns_name,
+ MsvAvEOL, "");
} else {
struct_blob = data_blob_null;
}
{
- /* Marshel the packet in the right format, be it unicode or ASCII */
+ /* Marshal the packet in the right format, be it unicode or ASCII */
const char *gen_string;
+ DATA_BLOB version_blob = data_blob_null;
+
+ if (chal_flags & NTLMSSP_NEGOTIATE_VERSION) {
+ enum ndr_err_code err;
+ struct VERSION vers;
+
+ /* "What Windows returns" as a version number. */
+ ZERO_STRUCT(vers);
+ vers.ProductMajorVersion = NTLMSSP_WINDOWS_MAJOR_VERSION_6;
+ vers.ProductMinorVersion = NTLMSSP_WINDOWS_MINOR_VERSION_1;
+ vers.ProductBuild = 0;
+ vers.NTLMRevisionCurrent = NTLMSSP_REVISION_W2K3;
+
+ err = ndr_push_struct_blob(&version_blob,
+ ntlmssp_state,
+ &vers,
+ (ndr_push_flags_fn_t)ndr_push_VERSION);
+
+ if (!NDR_ERR_CODE_IS_SUCCESS(err)) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ }
+
if (ntlmssp_state->unicode) {
- gen_string = "CdUdbddB";
+ gen_string = "CdUdbddBb";
} else {
- gen_string = "CdAdbddB";
+ gen_string = "CdAdbddBb";
}
msrpc_gen(ntlmssp_state, reply, gen_string,
- "NTLMSSP",
- NTLMSSP_CHALLENGE,
- target_name,
- chal_flags,
- cryptkey, 8,
- 0, 0,
- struct_blob.data, struct_blob.length);
+ "NTLMSSP",
+ NTLMSSP_CHALLENGE,
+ target_name,
+ chal_flags,
+ cryptkey, 8,
+ 0, 0,
+ struct_blob.data, struct_blob.length,
+ version_blob.data, version_blob.length);
+
+ data_blob_free(&version_blob);
+
+ if (DEBUGLEVEL >= 10) {
+ if (NT_STATUS_IS_OK(ntlmssp_pull_CHALLENGE_MESSAGE(reply,
+ ntlmssp_state,
+ &challenge)))
+ {
+ NDR_PRINT_DEBUG(CHALLENGE_MESSAGE, &challenge);
+ }
+ }
}
data_blob_free(&struct_blob);
* @param ntlmssp_state NTLMSSP State
* @param request The request, as a DATA_BLOB
* @param request The reply, as an allocated DATA_BLOB, caller to free.
- * @return Errors or NT_STATUS_OK.
+ * @return Errors or NT_STATUS_OK.
*/
static NTSTATUS ntlmssp_server_auth(struct ntlmssp_state *ntlmssp_state,
- const DATA_BLOB request, DATA_BLOB *reply)
+ const DATA_BLOB request, DATA_BLOB *reply)
{
DATA_BLOB encrypted_session_key = data_blob_null;
DATA_BLOB user_session_key = data_blob_null;
DATA_BLOB lm_session_key = data_blob_null;
DATA_BLOB session_key = data_blob_null;
- uint32 ntlmssp_command, auth_flags;
+ uint32_t ntlmssp_command, auth_flags;
NTSTATUS nt_status = NT_STATUS_OK;
+ struct AUTHENTICATE_MESSAGE authenticate;
/* used by NTLM2 */
bool doing_ntlm2 = False;
- uchar session_nonce[16];
- uchar session_nonce_hash[16];
+ uint8_t session_nonce[16];
+ uint8_t session_nonce_hash[16];
const char *parse_string;
ntlmssp_state->user = NULL;
ntlmssp_state->domain = NULL;
- ntlmssp_state->workstation = NULL;
/* now the NTLMSSP encoded auth hashes */
if (!msrpc_parse(ntlmssp_state, &request, parse_string,
- "NTLMSSP",
- &ntlmssp_command,
+ "NTLMSSP",
+ &ntlmssp_command,
&ntlmssp_state->lm_resp,
&ntlmssp_state->nt_resp,
- &ntlmssp_state->domain,
- &ntlmssp_state->user,
- &ntlmssp_state->workstation,
+ &ntlmssp_state->domain,
+ &ntlmssp_state->user,
+ &ntlmssp_state->client.netbios_name,
&encrypted_session_key,
&auth_flags)) {
auth_flags = 0;
/* now the NTLMSSP encoded auth hashes */
if (!msrpc_parse(ntlmssp_state, &request, parse_string,
- "NTLMSSP",
- &ntlmssp_command,
+ "NTLMSSP",
+ &ntlmssp_command,
&ntlmssp_state->lm_resp,
&ntlmssp_state->nt_resp,
- &ntlmssp_state->domain,
- &ntlmssp_state->user,
- &ntlmssp_state->workstation)) {
+ &ntlmssp_state->domain,
+ &ntlmssp_state->user,
+ &ntlmssp_state->client.netbios_name)) {
DEBUG(1, ("ntlmssp_server_auth: failed to parse NTLMSSP (tried both formats):\n"));
dump_data(2, request.data, request.length);
if (auth_flags)
ntlmssp_handle_neg_flags(ntlmssp_state, auth_flags, lp_lanman_auth());
+ if (DEBUGLEVEL >= 10) {
+ if (NT_STATUS_IS_OK(ntlmssp_pull_AUTHENTICATE_MESSAGE(&request,
+ ntlmssp_state,
+ &authenticate)))
+ {
+ NDR_PRINT_DEBUG(AUTHENTICATE_MESSAGE, &authenticate);
+ }
+ }
+
DEBUG(3,("Got user=[%s] domain=[%s] workstation=[%s] len1=%lu len2=%lu\n",
- ntlmssp_state->user, ntlmssp_state->domain, ntlmssp_state->workstation, (unsigned long)ntlmssp_state->lm_resp.length, (unsigned long)ntlmssp_state->nt_resp.length));
+ ntlmssp_state->user, ntlmssp_state->domain,
+ ntlmssp_state->client.netbios_name,
+ (unsigned long)ntlmssp_state->lm_resp.length,
+ (unsigned long)ntlmssp_state->nt_resp.length));
#if 0
file_save("nthash1.dat", &ntlmssp_state->nt_resp.data, &ntlmssp_state->nt_resp.length);
file_save("lmhash1.dat", &ntlmssp_state->lm_resp.data, &ntlmssp_state->lm_resp.length);
#endif
- /* NTLM2 uses a 'challenge' that is made of up both the server challenge, and a
- client challenge
+ /* NTLM2 uses a 'challenge' that is made of up both the server challenge, and a
+ client challenge
However, the NTLM2 flag may still be set for the real NTLMv2 logins, be careful.
*/
/* Finally, actually ask if the password is OK */
- if (!NT_STATUS_IS_OK(nt_status = ntlmssp_state->check_password(ntlmssp_state,
+ if (!NT_STATUS_IS_OK(nt_status = ntlmssp_state->check_password(ntlmssp_state,
&user_session_key, &lm_session_key))) {
data_blob_free(&encrypted_session_key);
return nt_status;
if (user_session_key.data && user_session_key.length == 16) {
session_key = data_blob_talloc(ntlmssp_state,
NULL, 16);
- hmac_md5(user_session_key.data, session_nonce,
+ hmac_md5(user_session_key.data, session_nonce,
sizeof(session_nonce), session_key.data);
DEBUG(10,("ntlmssp_server_auth: Created NTLM2 session key.\n"));
dump_data_pw("NTLM2 session key:\n", session_key.data, session_key.length);
if (session_key.data == NULL) {
return NT_STATUS_NO_MEMORY;
}
- SMBsesskeygen_lm_sess_key(lm_session_key.data, ntlmssp_state->lm_resp.data,
+ SMBsesskeygen_lm_sess_key(lm_session_key.data, ntlmssp_state->lm_resp.data,
session_key.data);
DEBUG(10,("ntlmssp_server_auth: Created NTLM session key.\n"));
} else {
- uint8 zeros[24];
- ZERO_STRUCT(zeros);
+ static const uint8_t zeros[24] = {0, };
session_key = data_blob_talloc(
ntlmssp_state, NULL, 16);
if (session_key.data == NULL) {
session_key = data_blob_null;
}
- /* With KEY_EXCH, the client supplies the proposed session key,
+ /* With KEY_EXCH, the client supplies the proposed session key,
but encrypts it with the long-term key */
if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH) {
if (!encrypted_session_key.data || encrypted_session_key.length != 16) {
data_blob_free(&encrypted_session_key);
- DEBUG(1, ("Client-supplied KEY_EXCH session key was of invalid length (%u)!\n",
+ DEBUG(1, ("Client-supplied KEY_EXCH session key was of invalid length (%u)!\n",
(unsigned int)encrypted_session_key.length));
return NT_STATUS_INVALID_PARAMETER;
} else if (!session_key.data || session_key.length != 16) {
- DEBUG(5, ("server session key is invalid (len == %u), cannot do KEY_EXCH!\n",
+ DEBUG(5, ("server session key is invalid (len == %u), cannot do KEY_EXCH!\n",
(unsigned int)session_key.length));
ntlmssp_state->session_key = session_key;
} else {
dump_data_pw("KEY_EXCH session key (enc):\n", encrypted_session_key.data, encrypted_session_key.length);
- arcfour_crypt_blob(encrypted_session_key.data,
- encrypted_session_key.length,
+ arcfour_crypt_blob(encrypted_session_key.data,
+ encrypted_session_key.length,
&session_key);
ntlmssp_state->session_key = data_blob_talloc(
ntlmssp_state, encrypted_session_key.data,
encrypted_session_key.length);
- dump_data_pw("KEY_EXCH session key:\n", encrypted_session_key.data,
+ dump_data_pw("KEY_EXCH session key:\n", encrypted_session_key.data,
encrypted_session_key.length);
}
} else {
/**
* Create an NTLMSSP state machine
- *
+ *
* @param ntlmssp_state NTLMSSP State, allocated by this function
*/
-NTSTATUS ntlmssp_server_start(NTLMSSP_STATE **ntlmssp_state)
+NTSTATUS ntlmssp_server_start(TALLOC_CTX *mem_ctx,
+ bool is_standalone,
+ const char *netbios_name,
+ const char *netbios_domain,
+ const char *dns_name,
+ const char *dns_domain,
+ struct ntlmssp_state **_ntlmssp_state)
{
- *ntlmssp_state = TALLOC_ZERO_P(NULL, NTLMSSP_STATE);
- if (!*ntlmssp_state) {
- DEBUG(0,("ntlmssp_server_start: talloc failed!\n"));
- talloc_destroy(*ntlmssp_state);
- return NT_STATUS_NO_MEMORY;
+ struct ntlmssp_state *ntlmssp_state;
+
+ if (!netbios_name) {
+ netbios_name = "";
+ }
+
+ if (!netbios_domain) {
+ netbios_domain = "";
+ }
+
+ if (!dns_domain) {
+ dns_domain = "";
+ }
+
+ if (!dns_name) {
+ dns_name = "";
}
- (*ntlmssp_state)->role = NTLMSSP_SERVER;
+ ntlmssp_state = talloc_zero(mem_ctx, struct ntlmssp_state);
+ if (!ntlmssp_state) {
+ return NT_STATUS_NO_MEMORY;
+ }
- (*ntlmssp_state)->get_challenge = get_challenge;
- (*ntlmssp_state)->set_challenge = set_challenge;
- (*ntlmssp_state)->may_set_challenge = may_set_challenge;
+ ntlmssp_state->role = NTLMSSP_SERVER;
- (*ntlmssp_state)->get_global_myname = global_myname;
- (*ntlmssp_state)->get_domain = lp_workgroup;
- (*ntlmssp_state)->server_role = ROLE_DOMAIN_MEMBER; /* a good default */
+ ntlmssp_state->get_challenge = get_challenge;
+ ntlmssp_state->set_challenge = set_challenge;
+ ntlmssp_state->may_set_challenge = may_set_challenge;
- (*ntlmssp_state)->expected_state = NTLMSSP_NEGOTIATE;
+ ntlmssp_state->server.is_standalone = is_standalone;
- (*ntlmssp_state)->ref_count = 1;
+ ntlmssp_state->expected_state = NTLMSSP_NEGOTIATE;
- (*ntlmssp_state)->neg_flags =
+ ntlmssp_state->neg_flags =
NTLMSSP_NEGOTIATE_128 |
NTLMSSP_NEGOTIATE_56 |
NTLMSSP_NEGOTIATE_VERSION |
NTLMSSP_NEGOTIATE_SIGN |
NTLMSSP_NEGOTIATE_SEAL;
+ ntlmssp_state->server.netbios_name = talloc_strdup(ntlmssp_state, netbios_name);
+ if (!ntlmssp_state->server.netbios_name) {
+ talloc_free(ntlmssp_state);
+ return NT_STATUS_NO_MEMORY;
+ }
+ ntlmssp_state->server.netbios_domain = talloc_strdup(ntlmssp_state, netbios_domain);
+ if (!ntlmssp_state->server.netbios_domain) {
+ talloc_free(ntlmssp_state);
+ return NT_STATUS_NO_MEMORY;
+ }
+ ntlmssp_state->server.dns_name = talloc_strdup(ntlmssp_state, dns_name);
+ if (!ntlmssp_state->server.dns_name) {
+ talloc_free(ntlmssp_state);
+ return NT_STATUS_NO_MEMORY;
+ }
+ ntlmssp_state->server.dns_domain = talloc_strdup(ntlmssp_state, dns_domain);
+ if (!ntlmssp_state->server.dns_domain) {
+ talloc_free(ntlmssp_state);
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ *_ntlmssp_state = ntlmssp_state;
return NT_STATUS_OK;
}
/**
* Next state function for the Initial packet
- *
+ *
* @param ntlmssp_state NTLMSSP State
* @param request The request, as a DATA_BLOB. reply.data must be NULL
* @param request The reply, as an allocated DATA_BLOB, caller to free.
- * @return Errors or NT_STATUS_OK.
+ * @return Errors or NT_STATUS_OK.
*/
-static NTSTATUS ntlmssp_client_initial(struct ntlmssp_state *ntlmssp_state,
- DATA_BLOB reply, DATA_BLOB *next_request)
+static NTSTATUS ntlmssp_client_initial(struct ntlmssp_state *ntlmssp_state,
+ DATA_BLOB reply, DATA_BLOB *next_request)
{
+ struct NEGOTIATE_MESSAGE negotiate;
+
if (ntlmssp_state->unicode) {
ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_UNICODE;
} else {
"NTLMSSP",
NTLMSSP_NEGOTIATE,
ntlmssp_state->neg_flags,
- ntlmssp_state->get_domain(),
- ntlmssp_state->get_global_myname());
+ ntlmssp_state->client.netbios_domain,
+ ntlmssp_state->client.netbios_name);
+
+ if (DEBUGLEVEL >= 10) {
+ if (NT_STATUS_IS_OK(ntlmssp_pull_NEGOTIATE_MESSAGE(next_request,
+ ntlmssp_state,
+ &negotiate)))
+ {
+ NDR_PRINT_DEBUG(NEGOTIATE_MESSAGE, &negotiate);
+ }
+ }
ntlmssp_state->expected_state = NTLMSSP_CHALLENGE;
/**
* Next state function for the Challenge Packet. Generate an auth packet.
- *
+ *
* @param ntlmssp_state NTLMSSP State
* @param request The request, as a DATA_BLOB. reply.data must be NULL
* @param request The reply, as an allocated DATA_BLOB, caller to free.
- * @return Errors or NT_STATUS_OK.
+ * @return Errors or NT_STATUS_OK.
*/
-static NTSTATUS ntlmssp_client_challenge(struct ntlmssp_state *ntlmssp_state,
- const DATA_BLOB reply, DATA_BLOB *next_request)
+static NTSTATUS ntlmssp_client_challenge(struct ntlmssp_state *ntlmssp_state,
+ const DATA_BLOB reply, DATA_BLOB *next_request)
{
- uint32 chal_flags, ntlmssp_command, unkn1, unkn2;
+ uint32_t chal_flags, ntlmssp_command, unkn1, unkn2;
DATA_BLOB server_domain_blob;
DATA_BLOB challenge_blob;
DATA_BLOB struct_blob = data_blob_null;
DATA_BLOB session_key = data_blob_null;
DATA_BLOB encrypted_session_key = data_blob_null;
NTSTATUS nt_status = NT_STATUS_OK;
+ struct CHALLENGE_MESSAGE challenge;
+ struct AUTHENTICATE_MESSAGE authenticate;
+
+ if (ntlmssp_state->use_ccache) {
+ struct wbcCredentialCacheParams params;
+ struct wbcCredentialCacheInfo *info = NULL;
+ struct wbcAuthErrorInfo *error = NULL;
+ struct wbcNamedBlob auth_blob;
+ struct wbcBlob *wbc_next = NULL;
+ struct wbcBlob *wbc_session_key = NULL;
+ wbcErr wbc_status;
+ int i;
+
+ params.account_name = ntlmssp_state->user;
+ params.domain_name = ntlmssp_state->domain;
+ params.level = WBC_CREDENTIAL_CACHE_LEVEL_NTLMSSP;
+
+ auth_blob.name = "challenge_blob";
+ auth_blob.flags = 0;
+ auth_blob.blob.data = reply.data;
+ auth_blob.blob.length = reply.length;
+ params.num_blobs = 1;
+ params.blobs = &auth_blob;
+
+ wbc_status = wbcCredentialCache(¶ms, &info, &error);
+ if (error != NULL) {
+ wbcFreeMemory(error);
+ }
+ if (!WBC_ERROR_IS_OK(wbc_status)) {
+ goto noccache;
+ }
+
+ for (i=0; i<info->num_blobs; i++) {
+ if (strequal(info->blobs[i].name, "auth_blob")) {
+ wbc_next = &info->blobs[i].blob;
+ }
+ if (strequal(info->blobs[i].name, "session_key")) {
+ wbc_session_key = &info->blobs[i].blob;
+ }
+ }
+ if ((wbc_next == NULL) || (wbc_session_key == NULL)) {
+ wbcFreeMemory(info);
+ goto noccache;
+ }
+
+ *next_request = data_blob(wbc_next->data, wbc_next->length);
+ ntlmssp_state->session_key = data_blob(
+ wbc_session_key->data, wbc_session_key->length);
+
+ wbcFreeMemory(info);
+ goto done;
+ }
+
+noccache:
if (!msrpc_parse(ntlmssp_state, &reply, "CdBd",
"NTLMSSP",
- &ntlmssp_command,
+ &ntlmssp_command,
&server_domain_blob,
&chal_flags)) {
DEBUG(1, ("Failed to parse the NTLMSSP Challenge: (#1)\n"));
return NT_STATUS_INVALID_PARAMETER;
}
+ if (DEBUGLEVEL >= 10) {
+ if (NT_STATUS_IS_OK(ntlmssp_pull_CHALLENGE_MESSAGE(&reply,
+ ntlmssp_state,
+ &challenge)))
+ {
+ NDR_PRINT_DEBUG(CHALLENGE_MESSAGE, &challenge);
+ }
+ }
+
data_blob_free(&server_domain_blob);
DEBUG(3, ("Got challenge flags:\n"));
ntlmssp_handle_neg_flags(ntlmssp_state, chal_flags, lp_client_lanman_auth());
if (ntlmssp_state->unicode) {
- if (chal_flags & NTLMSSP_CHAL_TARGET_INFO) {
+ if (chal_flags & NTLMSSP_NEGOTIATE_TARGET_INFO) {
chal_parse_string = "CdUdbddB";
} else {
chal_parse_string = "CdUdbdd";
}
auth_gen_string = "CdBBUUUBd";
} else {
- if (chal_flags & NTLMSSP_CHAL_TARGET_INFO) {
+ if (chal_flags & NTLMSSP_NEGOTIATE_TARGET_INFO) {
chal_parse_string = "CdAdbddB";
} else {
chal_parse_string = "CdAdbdd";
if (!msrpc_parse(ntlmssp_state, &reply, chal_parse_string,
"NTLMSSP",
- &ntlmssp_command,
+ &ntlmssp_command,
&server_domain,
&chal_flags,
&challenge_blob, 8,
return NT_STATUS_INVALID_PARAMETER;
}
- ntlmssp_state->server_domain = server_domain;
+ if (chal_flags & NTLMSSP_TARGET_TYPE_SERVER) {
+ ntlmssp_state->server.is_standalone = true;
+ } else {
+ ntlmssp_state->server.is_standalone = false;
+ }
+ /* TODO: parse struct_blob and fill in the rest */
+ ntlmssp_state->server.netbios_name = "";
+ ntlmssp_state->server.netbios_domain = server_domain;
+ ntlmssp_state->server.dns_name = "";
+ ntlmssp_state->server.dns_domain = "";
if (challenge_blob.length != 8) {
data_blob_free(&struct_blob);
}
if (!ntlmssp_state->nt_hash || !ntlmssp_state->lm_hash) {
- uchar zeros[16];
+ static const uint8_t zeros[16] = {0, };
/* do nothing - blobs are zero length */
- ZERO_STRUCT(zeros);
-
/* session key is all zeros */
session_key = data_blob_talloc(ntlmssp_state, zeros, 16);
/* TODO: if the remote server is standalone, then we should replace 'domain'
with the server name as supplied above */
- if (!SMBNTLMv2encrypt_hash(ntlmssp_state,
- ntlmssp_state->user,
- ntlmssp_state->domain,
- ntlmssp_state->nt_hash, &challenge_blob,
- &struct_blob,
+ if (!SMBNTLMv2encrypt_hash(ntlmssp_state,
+ ntlmssp_state->user,
+ ntlmssp_state->domain,
+ ntlmssp_state->nt_hash, &challenge_blob,
+ &struct_blob,
&lm_response, &nt_response, NULL,
&session_key)) {
data_blob_free(&challenge_blob);
}
} else if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) {
struct MD5Context md5_session_nonce_ctx;
- uchar session_nonce[16];
- uchar session_nonce_hash[16];
- uchar user_session_key[16];
+ uint8_t session_nonce[16];
+ uint8_t session_nonce_hash[16];
+ uint8_t user_session_key[16];
lm_response = data_blob_talloc(ntlmssp_state, NULL, 24);
generate_random_buffer(lm_response.data, 8);
nt_response.data);
session_key = data_blob_talloc(ntlmssp_state, NULL, 16);
- if ((ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_LM_KEY)
+ if ((ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_LM_KEY)
&& lp_client_lanman_auth()) {
SMBsesskeygen_lm_sess_key(ntlmssp_state->lm_hash, lm_response.data,
session_key.data);
the password-derived key */
if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH) {
/* Make up a new session key */
- uint8 client_session_key[16];
+ uint8_t client_session_key[16];
generate_random_buffer(client_session_key, sizeof(client_session_key));
/* Encrypt the new session key with the old one */
}
/* this generates the actual auth packet */
- if (!msrpc_gen(ntlmssp_state, next_request, auth_gen_string,
- "NTLMSSP",
- NTLMSSP_AUTH,
+ if (!msrpc_gen(ntlmssp_state, next_request, auth_gen_string,
+ "NTLMSSP",
+ NTLMSSP_AUTH,
lm_response.data, lm_response.length,
nt_response.data, nt_response.length,
- ntlmssp_state->domain,
- ntlmssp_state->user,
- ntlmssp_state->get_global_myname(),
+ ntlmssp_state->domain,
+ ntlmssp_state->user,
+ ntlmssp_state->client.netbios_name,
encrypted_session_key.data, encrypted_session_key.length,
ntlmssp_state->neg_flags)) {
return NT_STATUS_NO_MEMORY;
}
+ if (DEBUGLEVEL >= 10) {
+ if (NT_STATUS_IS_OK(ntlmssp_pull_AUTHENTICATE_MESSAGE(next_request,
+ ntlmssp_state,
+ &authenticate)))
+ {
+ NDR_PRINT_DEBUG(AUTHENTICATE_MESSAGE, &authenticate);
+ }
+ }
+
data_blob_free(&encrypted_session_key);
data_blob_free(&ntlmssp_state->chal);
ntlmssp_state->lm_resp = lm_response;
ntlmssp_state->nt_resp = nt_response;
+done:
+
ntlmssp_state->expected_state = NTLMSSP_DONE;
if (!NT_STATUS_IS_OK(nt_status = ntlmssp_sign_init(ntlmssp_state))) {
return nt_status;
}
-NTSTATUS ntlmssp_client_start(NTLMSSP_STATE **ntlmssp_state)
+NTSTATUS ntlmssp_client_start(TALLOC_CTX *mem_ctx,
+ const char *netbios_name,
+ const char *netbios_domain,
+ bool use_ntlmv2,
+ struct ntlmssp_state **_ntlmssp_state)
{
- *ntlmssp_state = TALLOC_ZERO_P(NULL, NTLMSSP_STATE);
- if (!*ntlmssp_state) {
- DEBUG(0,("ntlmssp_client_start: talloc failed!\n"));
- talloc_destroy(*ntlmssp_state);
- return NT_STATUS_NO_MEMORY;
+ struct ntlmssp_state *ntlmssp_state;
+
+ if (!netbios_name) {
+ netbios_name = "";
}
- (*ntlmssp_state)->role = NTLMSSP_CLIENT;
+ if (!netbios_domain) {
+ netbios_domain = "";
+ }
- (*ntlmssp_state)->get_global_myname = global_myname;
- (*ntlmssp_state)->get_domain = lp_workgroup;
+ ntlmssp_state = talloc_zero(mem_ctx, struct ntlmssp_state);
+ if (!ntlmssp_state) {
+ return NT_STATUS_NO_MEMORY;
+ }
- (*ntlmssp_state)->unicode = True;
+ ntlmssp_state->role = NTLMSSP_CLIENT;
- (*ntlmssp_state)->use_ntlmv2 = lp_client_ntlmv2_auth();
+ ntlmssp_state->unicode = True;
- (*ntlmssp_state)->expected_state = NTLMSSP_INITIAL;
+ ntlmssp_state->use_ntlmv2 = use_ntlmv2;
- (*ntlmssp_state)->ref_count = 1;
+ ntlmssp_state->expected_state = NTLMSSP_INITIAL;
- (*ntlmssp_state)->neg_flags =
+ ntlmssp_state->neg_flags =
NTLMSSP_NEGOTIATE_128 |
NTLMSSP_NEGOTIATE_ALWAYS_SIGN |
NTLMSSP_NEGOTIATE_NTLM |
NTLMSSP_NEGOTIATE_KEY_EXCH |
NTLMSSP_REQUEST_TARGET;
+ ntlmssp_state->client.netbios_name = talloc_strdup(ntlmssp_state, netbios_name);
+ if (!ntlmssp_state->client.netbios_name) {
+ talloc_free(ntlmssp_state);
+ return NT_STATUS_NO_MEMORY;
+ }
+ ntlmssp_state->client.netbios_domain = talloc_strdup(ntlmssp_state, netbios_domain);
+ if (!ntlmssp_state->client.netbios_domain) {
+ talloc_free(ntlmssp_state);
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ *_ntlmssp_state = ntlmssp_state;
return NT_STATUS_OK;
}
git.samba.org / amitay / samba.git / blobdiff