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-rw-r--r--source3/libsmb/ntlmssp.c741
1 files changed, 496 insertions, 245 deletions
diff --git a/source3/libsmb/ntlmssp.c b/source3/libsmb/ntlmssp.c
index c51b599b04..a0da1efcc1 100644
--- a/source3/libsmb/ntlmssp.c
+++ b/source3/libsmb/ntlmssp.c
@@ -23,6 +23,35 @@
#include "includes.h"
+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,
+ 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,
+ DATA_BLOB in, DATA_BLOB *out);
+} ntlmssp_callbacks[] = {
+ {NTLMSSP_CLIENT, NTLMSSP_INITIAL, ntlmssp_client_initial},
+ {NTLMSSP_SERVER, NTLMSSP_NEGOTIATE, ntlmssp_server_negotiate},
+ {NTLMSSP_CLIENT, NTLMSSP_CHALLENGE, ntlmssp_client_challenge},
+ {NTLMSSP_SERVER, NTLMSSP_AUTH, ntlmssp_server_auth},
+ {NTLMSSP_CLIENT, NTLMSSP_UNKNOWN, NULL},
+ {NTLMSSP_SERVER, NTLMSSP_UNKNOWN, NULL}
+};
+
+
/**
* Print out the NTLMSSP flags for debugging
* @param neg_flags The flags from the packet
@@ -71,7 +100,7 @@ void debug_ntlmssp_flags(uint32 neg_flags)
*
*/
-static const uint8 *get_challenge(struct ntlmssp_state *ntlmssp_state)
+static const uint8 *get_challenge(const struct ntlmssp_state *ntlmssp_state)
{
static uchar chal[8];
generate_random_buffer(chal, sizeof(chal), False);
@@ -80,6 +109,188 @@ static const uint8 *get_challenge(struct ntlmssp_state *ntlmssp_state)
}
/**
+ * Default 'we can set the challenge to anything we like' implementation
+ *
+ */
+
+static BOOL may_set_challenge(const struct ntlmssp_state *ntlmssp_state)
+{
+ return True;
+}
+
+/**
+ * Default 'we can set the challenge to anything we like' implementation
+ *
+ * Does not actually do anything, as the value is always in the structure anyway.
+ *
+ */
+
+static NTSTATUS set_challenge(struct ntlmssp_state *ntlmssp_state, DATA_BLOB *challenge)
+{
+ SMB_ASSERT(challenge->length == 8);
+ return NT_STATUS_OK;
+}
+
+/**
+ * Set a username on an NTLMSSP context - ensures it is talloc()ed
+ *
+ */
+
+NTSTATUS ntlmssp_set_username(NTLMSSP_STATE *ntlmssp_state, const char *user)
+{
+ ntlmssp_state->user = talloc_strdup(ntlmssp_state->mem_ctx, user);
+ if (!ntlmssp_state->user) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ return NT_STATUS_OK;
+}
+
+/**
+ * Set a password on an NTLMSSP context - ensures it is talloc()ed
+ *
+ */
+NTSTATUS ntlmssp_set_password(NTLMSSP_STATE *ntlmssp_state, const char *password)
+{
+ if (!password) {
+ ntlmssp_state->password = NULL;
+ } else {
+ ntlmssp_state->password = talloc_strdup(ntlmssp_state->mem_ctx, password);
+ if (!ntlmssp_state->password) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ }
+ return NT_STATUS_OK;
+}
+
+/**
+ * Set a domain on an NTLMSSP context - ensures it is talloc()ed
+ *
+ */
+NTSTATUS ntlmssp_set_domain(NTLMSSP_STATE *ntlmssp_state, const char *domain)
+{
+ ntlmssp_state->domain = talloc_strdup(ntlmssp_state->mem_ctx, domain);
+ if (!ntlmssp_state->domain) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ 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->mem_ctx, workstation);
+ if (!ntlmssp_state->domain) {
+ 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->mem_ctx,
+ response.data, response.length);
+ return NT_STATUS_OK;
+}
+
+/**
+ * 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.
+ */
+
+NTSTATUS ntlmssp_update(NTLMSSP_STATE *ntlmssp_state,
+ const DATA_BLOB in, DATA_BLOB *out)
+{
+ DATA_BLOB input;
+ uint32 ntlmssp_command;
+ int i;
+
+ *out = data_blob(NULL, 0);
+
+ 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, 0);
+ } else {
+ input = in;
+ }
+
+ if (!input.length) {
+ switch (ntlmssp_state->role) {
+ case NTLMSSP_CLIENT:
+ ntlmssp_command = NTLMSSP_INITIAL;
+ break;
+ case NTLMSSP_SERVER:
+ /* 'datagram' mode - no neg packet */
+ ntlmssp_command = NTLMSSP_NEGOTIATE;
+ break;
+ }
+ } else {
+ if (!msrpc_parse(&input, "Cd",
+ "NTLMSSP",
+ &ntlmssp_command)) {
+ DEBUG(1, ("Failed to parse NTLMSSP packet, could not extract NTLMSSP command\n"));
+ dump_data(2, (const char *)input.data, input.length);
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+ }
+
+ if (ntlmssp_command != ntlmssp_state->expected_state) {
+ DEBUG(1, ("got NTLMSSP command %u, expected %u\n", ntlmssp_command, ntlmssp_state->expected_state));
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ for (i=0; ntlmssp_callbacks[i].fn; i++) {
+ 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));
+
+ 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)
+{
+ TALLOC_CTX *mem_ctx = (*ntlmssp_state)->mem_ctx;
+
+ (*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_destroy(mem_ctx);
+ }
+
+ *ntlmssp_state = NULL;
+ return;
+}
+
+/**
* Determine correct target name flags for reply, given server role
* and negotiated flags
*
@@ -107,6 +318,46 @@ static const char *ntlmssp_target_name(struct ntlmssp_state *ntlmssp_state,
}
}
+static void ntlmssp_handle_neg_flags(struct ntlmssp_state *ntlmssp_state,
+ uint32 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;
+ ntlmssp_state->unicode = True;
+ } else {
+ ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_UNICODE;
+ ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_OEM;
+ ntlmssp_state->unicode = False;
+ }
+
+ if (neg_flags & NTLMSSP_NEGOTIATE_LM_KEY && allow_lm) {
+ /* other end forcing us to use LM */
+ ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_LM_KEY;
+ ntlmssp_state->use_ntlmv2 = False;
+ } else {
+ ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
+ }
+
+ if (!(neg_flags & NTLMSSP_NEGOTIATE_NTLM2)) {
+ ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_NTLM2;
+ ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
+ }
+
+ if (!(neg_flags & NTLMSSP_NEGOTIATE_128)) {
+ ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_128;
+ }
+
+ if (!(neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH)) {
+ ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_KEY_EXCH;
+ }
+
+ if ((neg_flags & NTLMSSP_REQUEST_TARGET)) {
+ ntlmssp_state->neg_flags |= NTLMSSP_REQUEST_TARGET;
+ }
+
+}
+
+
/**
* Next state function for the Negotiate packet
*
@@ -150,31 +401,27 @@ static NTSTATUS ntlmssp_server_negotiate(struct ntlmssp_state *ntlmssp_state,
debug_ntlmssp_flags(neg_flags);
}
- cryptkey = ntlmssp_state->get_challenge(ntlmssp_state);
+ ntlmssp_handle_neg_flags(ntlmssp_state, neg_flags, lp_lanman_auth());
- data_blob_free(&ntlmssp_state->chal);
- ntlmssp_state->chal = data_blob(cryptkey, 8);
-
- /* Give them the challenge. For now, ignore neg_flags and just
- return the flags we want. Obviously this is not correct */
-
- chal_flags =
- NTLMSSP_NEGOTIATE_128 |
- NTLMSSP_NEGOTIATE_NTLM;
-
- if (neg_flags & NTLMSSP_NEGOTIATE_UNICODE) {
- chal_flags |= NTLMSSP_NEGOTIATE_UNICODE;
- ntlmssp_state->unicode = True;
- } else {
- chal_flags |= NTLMSSP_NEGOTIATE_OEM;
- }
+ chal_flags = ntlmssp_state->neg_flags;
target_name = ntlmssp_target_name(ntlmssp_state,
neg_flags, &chal_flags);
-
- if (target_name == NULL)
+ if (target_name == NULL)
return NT_STATUS_INVALID_PARAMETER;
+ /* Ask our caller what challenge they would like in the packet */
+ cryptkey = ntlmssp_state->get_challenge(ntlmssp_state);
+
+ /* Check if we may set the challenge */
+ if (!ntlmssp_state->may_set_challenge(ntlmssp_state)) {
+ ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_NTLM2;
+ }
+
+ ntlmssp_state->chal = data_blob_talloc(ntlmssp_state->mem_ctx, cryptkey, 8);
+ ntlmssp_state->internal_chal = data_blob_talloc(ntlmssp_state->mem_ctx, cryptkey, 8);
+
+
/* This should be a 'netbios domain -> DNS domain' mapping */
dnsdomname[0] = '\0';
get_mydomname(dnsdomname);
@@ -184,6 +431,7 @@ static NTSTATUS ntlmssp_server_negotiate(struct ntlmssp_state *ntlmssp_state,
get_myfullname(dnsname);
strlower_m(dnsname);
+ /* This creates the 'blob' of names that appears at the end of the packet */
if (chal_flags & NTLMSSP_CHAL_TARGET_INFO)
{
const char *target_name_dns = "";
@@ -194,16 +442,17 @@ static NTSTATUS ntlmssp_server_negotiate(struct ntlmssp_state *ntlmssp_state,
}
msrpc_gen(&struct_blob, "aaaaa",
- ntlmssp_state->unicode, NTLMSSP_NAME_TYPE_DOMAIN, target_name,
- ntlmssp_state->unicode, NTLMSSP_NAME_TYPE_SERVER, ntlmssp_state->get_global_myname(),
- ntlmssp_state->unicode, NTLMSSP_NAME_TYPE_DOMAIN_DNS, target_name_dns,
- ntlmssp_state->unicode, NTLMSSP_NAME_TYPE_SERVER_DNS, dnsdomname,
- ntlmssp_state->unicode, 0, "");
+ 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, "");
} else {
struct_blob = data_blob(NULL, 0);
}
{
+ /* Marshel the packet in the right format, be it unicode or ASCII */
const char *gen_string;
if (ntlmssp_state->unicode) {
gen_string = "CdUdbddB";
@@ -240,13 +489,27 @@ static NTSTATUS ntlmssp_server_negotiate(struct ntlmssp_state *ntlmssp_state,
static NTSTATUS ntlmssp_server_auth(struct ntlmssp_state *ntlmssp_state,
const DATA_BLOB request, DATA_BLOB *reply)
{
- DATA_BLOB sess_key;
- uint32 ntlmssp_command, neg_flags;
+ DATA_BLOB encrypted_session_key = data_blob(NULL, 0);
+ DATA_BLOB nt_session_key = data_blob(NULL, 0);
+ DATA_BLOB lm_session_key = data_blob(NULL, 0);
+ DATA_BLOB session_key = data_blob(NULL, 0);
+ uint32 ntlmssp_command, auth_flags;
NTSTATUS nt_status;
+ /* used by NTLM2 */
+ BOOL doing_ntlm2 = False;
+
+ uchar session_nonce[16];
+ uchar session_nonce_hash[16];
+
const char *parse_string;
+ char *domain = NULL;
+ char *user = NULL;
+ char *workstation = NULL;
/* parse the NTLMSSP packet */
+ *reply = data_blob(NULL, 0);
+
#if 0
file_save("ntlmssp_auth.dat", request.data, request.length);
#endif
@@ -260,9 +523,9 @@ static NTSTATUS ntlmssp_server_auth(struct ntlmssp_state *ntlmssp_state,
data_blob_free(&ntlmssp_state->lm_resp);
data_blob_free(&ntlmssp_state->nt_resp);
- SAFE_FREE(ntlmssp_state->user);
- SAFE_FREE(ntlmssp_state->domain);
- SAFE_FREE(ntlmssp_state->workstation);
+ ntlmssp_state->user = NULL;
+ ntlmssp_state->domain = NULL;
+ ntlmssp_state->workstation = NULL;
/* now the NTLMSSP encoded auth hashes */
if (!msrpc_parse(&request, parse_string,
@@ -270,18 +533,73 @@ static NTSTATUS ntlmssp_server_auth(struct ntlmssp_state *ntlmssp_state,
&ntlmssp_command,
&ntlmssp_state->lm_resp,
&ntlmssp_state->nt_resp,
- &ntlmssp_state->domain,
- &ntlmssp_state->user,
- &ntlmssp_state->workstation,
- &sess_key,
- &neg_flags)) {
+ &domain,
+ &user,
+ &workstation,
+ &encrypted_session_key,
+ &auth_flags)) {
DEBUG(1, ("ntlmssp_server_auth: failed to parse NTLMSSP:\n"));
dump_data(2, (const char *)request.data, request.length);
- return NT_STATUS_INVALID_PARAMETER;
+ SAFE_FREE(domain);
+ SAFE_FREE(user);
+ SAFE_FREE(workstation);
+ data_blob_free(&encrypted_session_key);
+ auth_flags = 0;
+
+ /* Try again with a shorter string (Win9X truncates this packet) */
+ if (ntlmssp_state->unicode) {
+ parse_string = "CdBBUUU";
+ } else {
+ parse_string = "CdBBAAA";
+ }
+
+ /* now the NTLMSSP encoded auth hashes */
+ if (!msrpc_parse(&request, parse_string,
+ "NTLMSSP",
+ &ntlmssp_command,
+ &ntlmssp_state->lm_resp,
+ &ntlmssp_state->nt_resp,
+ &domain,
+ &user,
+ &workstation)) {
+ DEBUG(1, ("ntlmssp_server_auth: failed to parse NTLMSSP:\n"));
+ dump_data(2, (const char *)request.data, request.length);
+ SAFE_FREE(domain);
+ SAFE_FREE(user);
+ SAFE_FREE(workstation);
+
+ return NT_STATUS_INVALID_PARAMETER;
+ }
}
- data_blob_free(&sess_key);
-
+ if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_domain(ntlmssp_state, domain))) {
+ SAFE_FREE(domain);
+ SAFE_FREE(user);
+ SAFE_FREE(workstation);
+ data_blob_free(&encrypted_session_key);
+ return nt_status;
+ }
+
+ if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_username(ntlmssp_state, user))) {
+ SAFE_FREE(domain);
+ SAFE_FREE(user);
+ SAFE_FREE(workstation);
+ data_blob_free(&encrypted_session_key);
+ return nt_status;
+ }
+
+ if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_workstation(ntlmssp_state, workstation))) {
+ SAFE_FREE(domain);
+ SAFE_FREE(user);
+ SAFE_FREE(workstation);
+ data_blob_free(&encrypted_session_key);
+ return nt_status;
+ }
+
+ SAFE_FREE(domain);
+ SAFE_FREE(user);
+ SAFE_FREE(workstation);
+
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));
@@ -290,9 +608,98 @@ static NTSTATUS ntlmssp_server_auth(struct ntlmssp_state *ntlmssp_state,
file_save("lmhash1.dat", &ntlmssp_state->lm_resp.data, &ntlmssp_state->lm_resp.length);
#endif
- nt_status = ntlmssp_state->check_password(ntlmssp_state);
+ /* NTLM2 uses a 'challenge' that is made of up both the server challenge, and a
+ client challenge
- *reply = data_blob(NULL, 0);
+ However, the NTLM2 flag may still be set for the real NTLMv2 logins, be careful.
+ */
+ if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) {
+ if (ntlmssp_state->nt_resp.length == 24 && ntlmssp_state->lm_resp.length == 24) {
+ struct MD5Context md5_session_nonce_ctx;
+ SMB_ASSERT(ntlmssp_state->internal_chal.data && ntlmssp_state->internal_chal.length == 8);
+
+ doing_ntlm2 = True;
+
+ memcpy(session_nonce, ntlmssp_state->internal_chal.data, 8);
+ memcpy(&session_nonce[8], ntlmssp_state->lm_resp.data, 8);
+
+ MD5Init(&md5_session_nonce_ctx);
+ MD5Update(&md5_session_nonce_ctx, session_nonce, 16);
+ MD5Final(session_nonce_hash, &md5_session_nonce_ctx);
+
+ ntlmssp_state->chal = data_blob_talloc(ntlmssp_state->mem_ctx, session_nonce_hash, 8);
+
+ /* LM response is no longer useful */
+ data_blob_free(&ntlmssp_state->lm_resp);
+
+ /* We changed the effective challenge - set it */
+ if (!NT_STATUS_IS_OK(nt_status = ntlmssp_state->set_challenge(ntlmssp_state, &ntlmssp_state->chal))) {
+ data_blob_free(&encrypted_session_key);
+ return nt_status;
+ }
+ }
+ }
+
+ /* Finally, actually ask if the password is OK */
+ if (!NT_STATUS_IS_OK(nt_status = ntlmssp_state->check_password(ntlmssp_state, &nt_session_key, &lm_session_key))) {
+ data_blob_free(&encrypted_session_key);
+ return nt_status;
+ }
+
+ dump_data_pw("NT session key:\n", nt_session_key.data, nt_session_key.length);
+ dump_data_pw("LM first-8:\n", lm_session_key.data, lm_session_key.length);
+
+ /* Handle the different session key derivation for NTLM2 */
+ if (doing_ntlm2) {
+ if (nt_session_key.data && nt_session_key.length == 16) {
+ session_key = data_blob_talloc(ntlmssp_state->mem_ctx, NULL, 16);
+ hmac_md5(nt_session_key.data, session_nonce,
+ sizeof(session_nonce), session_key.data);
+ dump_data_pw("NTLM2 session key:\n", session_key.data, session_key.length);
+
+ }
+ } else if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_LM_KEY) {
+ if (lm_session_key.data && lm_session_key.length >= 8 &&
+ ntlmssp_state->lm_resp.data && ntlmssp_state->lm_resp.length == 24) {
+ session_key = data_blob_talloc(ntlmssp_state->mem_ctx, NULL, 16);
+ SMBsesskeygen_lmv1(lm_session_key.data, ntlmssp_state->lm_resp.data,
+ session_key.data);
+ dump_data_pw("LM session key:\n", session_key.data, session_key.length);
+ }
+ } else if (nt_session_key.data) {
+ session_key = nt_session_key;
+ dump_data_pw("unmodified session key:\n", session_key.data, session_key.length);
+ }
+
+ /* 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",
+ 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",
+ session_key.length));
+ } else {
+ dump_data_pw("KEY_EXCH session key (enc):\n", encrypted_session_key.data, encrypted_session_key.length);
+ SamOEMhash(encrypted_session_key.data,
+ session_key.data,
+ encrypted_session_key.length);
+ ntlmssp_state->session_key = data_blob_talloc(ntlmssp_state->mem_ctx,
+ encrypted_session_key.data,
+ encrypted_session_key.length);
+ dump_data_pw("KEY_EXCH session key:\n", session_key.data, session_key.length);
+ }
+ } else {
+ ntlmssp_state->session_key = session_key;
+ }
+
+ data_blob_free(&encrypted_session_key);
+
+ /* allow arbitarily many authentications */
+ ntlmssp_state->expected_state = NTLMSSP_AUTH;
return nt_status;
}
@@ -316,8 +723,12 @@ NTSTATUS ntlmssp_server_start(NTLMSSP_STATE **ntlmssp_state)
return NT_STATUS_NO_MEMORY;
}
+ (*ntlmssp_state)->role = NTLMSSP_SERVER;
+
(*ntlmssp_state)->mem_ctx = mem_ctx;
(*ntlmssp_state)->get_challenge = get_challenge;
+ (*ntlmssp_state)->set_challenge = set_challenge;
+ (*ntlmssp_state)->may_set_challenge = may_set_challenge;
(*ntlmssp_state)->get_global_myname = global_myname;
(*ntlmssp_state)->get_domain = lp_workgroup;
@@ -325,73 +736,18 @@ NTSTATUS ntlmssp_server_start(NTLMSSP_STATE **ntlmssp_state)
(*ntlmssp_state)->expected_state = NTLMSSP_NEGOTIATE;
- return NT_STATUS_OK;
-}
-
-/**
- * End an NTLMSSP state machine
- *
- * @param ntlmssp_state NTLMSSP State, free()ed by this function
- */
-
-NTSTATUS ntlmssp_server_end(NTLMSSP_STATE **ntlmssp_state)
-{
- TALLOC_CTX *mem_ctx = (*ntlmssp_state)->mem_ctx;
-
- data_blob_free(&(*ntlmssp_state)->chal);
- data_blob_free(&(*ntlmssp_state)->lm_resp);
- data_blob_free(&(*ntlmssp_state)->nt_resp);
+ (*ntlmssp_state)->ref_count = 1;
- SAFE_FREE((*ntlmssp_state)->user);
- SAFE_FREE((*ntlmssp_state)->domain);
- SAFE_FREE((*ntlmssp_state)->workstation);
+ (*ntlmssp_state)->neg_flags =
+ NTLMSSP_NEGOTIATE_128 |
+ NTLMSSP_NEGOTIATE_NTLM |
+ NTLMSSP_NEGOTIATE_NTLM2 |
+ NTLMSSP_NEGOTIATE_KEY_EXCH |
+ NTLMSSP_NEGOTIATE_SIGN;
- talloc_destroy(mem_ctx);
- *ntlmssp_state = NULL;
return NT_STATUS_OK;
}
-/**
- * Next state function for the NTLMSSP state machine
- *
- * @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, NT_STATUS_MORE_PROCESSING_REQUIRED or NT_STATUS_OK.
- */
-
-NTSTATUS ntlmssp_server_update(NTLMSSP_STATE *ntlmssp_state,
- const DATA_BLOB request, DATA_BLOB *reply)
-{
- uint32 ntlmssp_command;
- *reply = data_blob(NULL, 0);
-
- if (request.length) {
- if (!msrpc_parse(&request, "Cd",
- "NTLMSSP",
- &ntlmssp_command)) {
- return NT_STATUS_INVALID_PARAMETER;
- }
- } else {
- /* 'datagram' mode - no neg packet */
- ntlmssp_command = NTLMSSP_NEGOTIATE;
- }
-
- if (ntlmssp_command != ntlmssp_state->expected_state) {
- DEBUG(1, ("got NTLMSSP command %u, expected %u\n", ntlmssp_command, ntlmssp_state->expected_state));
- return NT_STATUS_INVALID_PARAMETER;
- }
-
- if (ntlmssp_command == NTLMSSP_NEGOTIATE) {
- return ntlmssp_server_negotiate(ntlmssp_state, request, reply);
- } else if (ntlmssp_command == NTLMSSP_AUTH) {
- return ntlmssp_server_auth(ntlmssp_state, request, reply);
- } else {
- DEBUG(1, ("unknown NTLMSSP command %u, expected %u\n", ntlmssp_command, ntlmssp_state->expected_state));
- return NT_STATUS_INVALID_PARAMETER;
- }
-}
-
/*********************************************************************
Client side NTLMSSP
*********************************************************************/
@@ -405,11 +761,13 @@ NTSTATUS ntlmssp_server_update(NTLMSSP_STATE *ntlmssp_state,
* @return Errors or NT_STATUS_OK.
*/
-static NTSTATUS ntlmssp_client_initial(struct ntlmssp_client_state *ntlmssp_state,
+static NTSTATUS ntlmssp_client_initial(struct ntlmssp_state *ntlmssp_state,
DATA_BLOB reply, DATA_BLOB *next_request)
{
if (ntlmssp_state->unicode) {
ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_UNICODE;
+ } else {
+ ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_OEM;
}
if (ntlmssp_state->use_ntlmv2) {
@@ -426,6 +784,8 @@ static NTSTATUS ntlmssp_client_initial(struct ntlmssp_client_state *ntlmssp_stat
ntlmssp_state->get_domain(),
ntlmssp_state->get_global_myname());
+ ntlmssp_state->expected_state = NTLMSSP_CHALLENGE;
+
return NT_STATUS_MORE_PROCESSING_REQUIRED;
}
@@ -438,7 +798,7 @@ static NTSTATUS ntlmssp_client_initial(struct ntlmssp_client_state *ntlmssp_stat
* @return Errors or NT_STATUS_OK.
*/
-static NTSTATUS ntlmssp_client_challenge(struct ntlmssp_client_state *ntlmssp_state,
+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;
@@ -469,17 +829,16 @@ static NTSTATUS ntlmssp_client_challenge(struct ntlmssp_client_state *ntlmssp_st
DEBUG(3, ("Got challenge flags:\n"));
debug_ntlmssp_flags(chal_flags);
- if (chal_flags & NTLMSSP_NEGOTIATE_UNICODE) {
+ ntlmssp_handle_neg_flags(ntlmssp_state, chal_flags, lp_client_lanman_auth());
+
+ if (ntlmssp_state->unicode) {
if (chal_flags & NTLMSSP_CHAL_TARGET_INFO) {
chal_parse_string = "CdUdbddB";
} else {
chal_parse_string = "CdUdbdd";
}
auth_gen_string = "CdBBUUUBd";
- ntlmssp_state->unicode = True;
- ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_UNICODE;
- ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_OEM;
- } else if (chal_flags & NTLMSSP_NEGOTIATE_OEM) {
+ } else {
if (chal_flags & NTLMSSP_CHAL_TARGET_INFO) {
chal_parse_string = "CdAdbddB";
} else {
@@ -487,32 +846,6 @@ static NTSTATUS ntlmssp_client_challenge(struct ntlmssp_client_state *ntlmssp_st
}
auth_gen_string = "CdBBAAABd";
-
- ntlmssp_state->unicode = False;
- ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_UNICODE;
- ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_OEM;
- } else {
- return NT_STATUS_INVALID_PARAMETER;
- }
-
- if (chal_flags & NTLMSSP_NEGOTIATE_LM_KEY && lp_client_lanman_auth()) {
- /* server forcing us to use LM */
- ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_LM_KEY;
- ntlmssp_state->use_ntlmv2 = False;
- } else {
- ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
- }
-
- if (!(chal_flags & NTLMSSP_NEGOTIATE_NTLM2)) {
- ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_NTLM2;
- }
-
- if (!(chal_flags & NTLMSSP_NEGOTIATE_128)) {
- ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_128;
- }
-
- if (!(chal_flags & NTLMSSP_NEGOTIATE_KEY_EXCH)) {
- ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_KEY_EXCH;
}
DEBUG(3, ("NTLMSSP: Set final flags:\n"));
@@ -546,6 +879,7 @@ static NTSTATUS ntlmssp_client_challenge(struct ntlmssp_client_state *ntlmssp_st
if (!struct_blob.length) {
/* be lazy, match win2k - we can't do NTLMv2 without it */
+ DEBUG(1, ("Server did not provide 'target information', required for NTLMv2\n"));
return NT_STATUS_INVALID_PARAMETER;
}
@@ -569,7 +903,7 @@ static NTSTATUS ntlmssp_client_challenge(struct ntlmssp_client_state *ntlmssp_st
uchar nt_session_key[16];
E_md4hash(ntlmssp_state->password, nt_hash);
- lm_response = data_blob(NULL, 24);
+ lm_response = data_blob_talloc(ntlmssp_state->mem_ctx, NULL, 24);
generate_random_buffer(lm_response.data, 8, False);
memset(lm_response.data+8, 0, 16);
@@ -580,16 +914,21 @@ static NTSTATUS ntlmssp_client_challenge(struct ntlmssp_client_state *ntlmssp_st
MD5Update(&md5_session_nonce_ctx, challenge_blob.data, 8);
MD5Update(&md5_session_nonce_ctx, lm_response.data, 8);
MD5Final(session_nonce_hash, &md5_session_nonce_ctx);
+
+ DEBUG(5, ("NTLMSSP challenge set by NTLM2\n"));
+ DEBUG(5, ("challenge is: \n"));
+ dump_data(5, session_nonce_hash, 8);
- nt_response = data_blob(NULL, 24);
+ nt_response = data_blob_talloc(ntlmssp_state->mem_ctx, NULL, 24);
SMBNTencrypt(ntlmssp_state->password,
session_nonce_hash,
nt_response.data);
- session_key = data_blob(NULL, 16);
+ session_key = data_blob_talloc(ntlmssp_state->mem_ctx, NULL, 16);
SMBsesskeygen_ntv1(nt_hash, NULL, nt_session_key);
hmac_md5(nt_session_key, session_nonce, sizeof(session_nonce), session_key.data);
+ dump_data_pw("NTLM2 session key:\n", session_key.data, session_key.length);
} else {
@@ -600,22 +939,24 @@ static NTSTATUS ntlmssp_client_challenge(struct ntlmssp_client_state *ntlmssp_st
/* lanman auth is insecure, it may be disabled */
if (lp_client_lanman_auth()) {
- lm_response = data_blob(NULL, 24);
+ lm_response = data_blob_talloc(ntlmssp_state->mem_ctx, NULL, 24);
SMBencrypt(ntlmssp_state->password,challenge_blob.data,
lm_response.data);
- }
+ }
- nt_response = data_blob(NULL, 24);
+ nt_response = data_blob_talloc(ntlmssp_state->mem_ctx, NULL, 24);
SMBNTencrypt(ntlmssp_state->password,challenge_blob.data,
nt_response.data);
- session_key = data_blob(NULL, 16);
+ session_key = data_blob_talloc(ntlmssp_state->mem_ctx, NULL, 16);
if ((ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_LM_KEY)
&& lp_client_lanman_auth()) {
SMBsesskeygen_lmv1(lm_hash, lm_response.data,
session_key.data);
+ dump_data_pw("LM session key\n", session_key.data, session_key.length);
} else {
SMBsesskeygen_ntv1(nt_hash, NULL, session_key.data);
+ dump_data_pw("NT session key:\n", session_key.data, session_key.length);
}
}
data_blob_free(&struct_blob);
@@ -627,9 +968,12 @@ static NTSTATUS ntlmssp_client_challenge(struct ntlmssp_client_state *ntlmssp_st
generate_random_buffer(client_session_key, sizeof(client_session_key), False);
encrypted_session_key = data_blob(client_session_key, sizeof(client_session_key));
+ dump_data_pw("KEY_EXCH session key:\n", encrypted_session_key.data, encrypted_session_key.length);
+
SamOEMhash(encrypted_session_key.data, session_key.data, encrypted_session_key.length);
data_blob_free(&session_key);
- session_key = data_blob(client_session_key, sizeof(client_session_key));
+ session_key = data_blob_talloc(ntlmssp_state->mem_ctx, client_session_key, sizeof(client_session_key));
+ dump_data_pw("KEY_EXCH session key (enc):\n", encrypted_session_key.data, encrypted_session_key.length);
}
/* this generates the actual auth packet */
@@ -644,28 +988,24 @@ static NTSTATUS ntlmssp_client_challenge(struct ntlmssp_client_state *ntlmssp_st
encrypted_session_key.data, encrypted_session_key.length,
ntlmssp_state->neg_flags)) {
- data_blob_free(&lm_response);
- data_blob_free(&nt_response);
- data_blob_free(&session_key);
return NT_STATUS_NO_MEMORY;
}
data_blob_free(&encrypted_session_key);
data_blob_free(&ntlmssp_state->chal);
- data_blob_free(&ntlmssp_state->lm_resp);
- data_blob_free(&ntlmssp_state->nt_resp);
- data_blob_free(&ntlmssp_state->session_key);
ntlmssp_state->chal = challenge_blob;
ntlmssp_state->lm_resp = lm_response;
ntlmssp_state->nt_resp = nt_response;
ntlmssp_state->session_key = session_key;
+ ntlmssp_state->expected_state = NTLMSSP_UNKNOWN;
+
return NT_STATUS_MORE_PROCESSING_REQUIRED;
}
-NTSTATUS ntlmssp_client_start(NTLMSSP_CLIENT_STATE **ntlmssp_state)
+NTSTATUS ntlmssp_client_start(NTLMSSP_STATE **ntlmssp_state)
{
TALLOC_CTX *mem_ctx;
@@ -678,6 +1018,8 @@ NTSTATUS ntlmssp_client_start(NTLMSSP_CLIENT_STATE **ntlmssp_state)
return NT_STATUS_NO_MEMORY;
}
+ (*ntlmssp_state)->role = NTLMSSP_CLIENT;
+
(*ntlmssp_state)->mem_ctx = mem_ctx;
(*ntlmssp_state)->get_global_myname = global_myname;
@@ -687,6 +1029,10 @@ NTSTATUS ntlmssp_client_start(NTLMSSP_CLIENT_STATE **ntlmssp_state)
(*ntlmssp_state)->use_ntlmv2 = lp_client_ntlmv2_auth();
+ (*ntlmssp_state)->expected_state = NTLMSSP_INITIAL;
+
+ (*ntlmssp_state)->ref_count = 1;
+
(*ntlmssp_state)->neg_flags =
NTLMSSP_NEGOTIATE_128 |
NTLMSSP_NEGOTIATE_NTLM |
@@ -700,101 +1046,6 @@ NTSTATUS ntlmssp_client_start(NTLMSSP_CLIENT_STATE **ntlmssp_state)
NTLMSSP_NEGOTIATE_SIGN |
NTLMSSP_REQUEST_TARGET;
- (*ntlmssp_state)->ref_count = 1;
-
- return NT_STATUS_OK;
-}
-
-NTSTATUS ntlmssp_client_end(NTLMSSP_CLIENT_STATE **ntlmssp_state)
-{
- TALLOC_CTX *mem_ctx = (*ntlmssp_state)->mem_ctx;
-
- (*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);
- data_blob_free(&(*ntlmssp_state)->session_key);
- data_blob_free(&(*ntlmssp_state)->stored_response);
- talloc_destroy(mem_ctx);
- }
-
- *ntlmssp_state = NULL;
return NT_STATUS_OK;
}
-NTSTATUS ntlmssp_client_update(NTLMSSP_CLIENT_STATE *ntlmssp_state,
- DATA_BLOB reply, DATA_BLOB *next_request)
-{
- NTSTATUS nt_status = NT_STATUS_INVALID_PARAMETER;
- uint32 ntlmssp_command;
- *next_request = data_blob(NULL, 0);
-
- if (!reply.length) {
- /* If there is a cached reply, use it - otherwise this is the first packet */
- if (!ntlmssp_state->stored_response.length) {
- return ntlmssp_client_initial(ntlmssp_state, reply, next_request);
- }
-
- reply = ntlmssp_state->stored_response;
- }
-
- if (!msrpc_parse(&reply, "Cd",
- "NTLMSSP",
- &ntlmssp_command)) {
- return NT_STATUS_INVALID_PARAMETER;
- }
-
- if (ntlmssp_command == NTLMSSP_CHALLENGE) {
- nt_status = ntlmssp_client_challenge(ntlmssp_state, reply, next_request);
- }
- if (ntlmssp_state->stored_response.length) {
- data_blob_free(&ntlmssp_state->stored_response);
- }
- return nt_status;
-}
-
-NTSTATUS ntlmssp_set_username(NTLMSSP_CLIENT_STATE *ntlmssp_state, const char *user)
-{
- ntlmssp_state->user = talloc_strdup(ntlmssp_state->mem_ctx, user);
- if (!ntlmssp_state->user) {
- return NT_STATUS_NO_MEMORY;
- }
- return NT_STATUS_OK;
-}
-
-NTSTATUS ntlmssp_set_password(NTLMSSP_CLIENT_STATE *ntlmssp_state, const char *password)
-{
- if (!password) {
- ntlmssp_state->password = NULL;
- } else {
- ntlmssp_state->password = talloc_strdup(ntlmssp_state->mem_ctx, password);
- if (!ntlmssp_state->password) {
- return NT_STATUS_NO_MEMORY;
- }
- }
- return NT_STATUS_OK;
-}
-
-NTSTATUS ntlmssp_set_domain(NTLMSSP_CLIENT_STATE *ntlmssp_state, const char *domain)
-{
- ntlmssp_state->domain = talloc_strdup(ntlmssp_state->mem_ctx, domain);
- if (!ntlmssp_state->domain) {
- return NT_STATUS_NO_MEMORY;
- }
- return NT_STATUS_OK;
-}
-
-/**
- * Store a DATA_BLOB containing an NTLMSSP response, for use later.
- * This 'keeps' the data blob - the caller must *not* free it.
- */
-
-NTSTATUS ntlmssp_client_store_response(NTLMSSP_CLIENT_STATE *ntlmssp_state,
- DATA_BLOB response)
-{
- data_blob_free(&ntlmssp_state->stored_response);
- ntlmssp_state->stored_response = response;
- return NT_STATUS_OK;
-}