diff options
Diffstat (limited to 'source3/libsmb/ntlmssp.c')
| -rw-r--r-- | source3/libsmb/ntlmssp.c | 304 |
1 files changed, 301 insertions, 3 deletions
diff --git a/source3/libsmb/ntlmssp.c b/source3/libsmb/ntlmssp.c index 92a18d25c0..7992c1e84a 100644 --- a/source3/libsmb/ntlmssp.c +++ b/source3/libsmb/ntlmssp.c @@ -25,6 +25,7 @@ /** * Print out the NTLMSSP flags for debugging + * @param neg_flags The flags from the packet */ void debug_ntlmssp_flags(uint32 neg_flags) @@ -78,6 +79,16 @@ static const uint8 *get_challenge(struct ntlmssp_state *ntlmssp_state) return chal; } +/** + * Determine correct target name flags for reply, given server role + * and negoitated falgs + * + * @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 + * @return The 'target name' string. + */ + static const char *ntlmssp_target_name(struct ntlmssp_state *ntlmssp_state, uint32 neg_flags, uint32 *chal_flags) { @@ -96,8 +107,17 @@ static const char *ntlmssp_target_name(struct ntlmssp_state *ntlmssp_state, } } +/** + * Next state function for the Negotiate packet + * + * @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 MORE_PROCESSING_REQUIRED if a reply is sent. + */ + static NTSTATUS ntlmssp_server_negotiate(struct ntlmssp_state *ntlmssp_state, - DATA_BLOB request, DATA_BLOB *reply) + const DATA_BLOB request, DATA_BLOB *reply) { DATA_BLOB struct_blob; fstring dnsname, dnsdomname; @@ -201,8 +221,17 @@ static NTSTATUS ntlmssp_server_negotiate(struct ntlmssp_state *ntlmssp_state, return NT_STATUS_MORE_PROCESSING_REQUIRED; } +/** + * Next state function for the Authenticate packet + * + * @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. + */ + static NTSTATUS ntlmssp_server_auth(struct ntlmssp_state *ntlmssp_state, - DATA_BLOB request, DATA_BLOB *reply) + const DATA_BLOB request, DATA_BLOB *reply) { DATA_BLOB sess_key; uint32 ntlmssp_command, neg_flags; @@ -259,6 +288,12 @@ static NTSTATUS ntlmssp_server_auth(struct ntlmssp_state *ntlmssp_state, return nt_status; } +/** + * Create an NTLMSSP state machine + * + * @param ntlmssp_state NTLMSSP State, allocated by this funciton + */ + NTSTATUS ntlmssp_server_start(NTLMSSP_STATE **ntlmssp_state) { TALLOC_CTX *mem_ctx; @@ -286,6 +321,12 @@ NTSTATUS ntlmssp_server_start(NTLMSSP_STATE **ntlmssp_state) return NT_STATUS_OK; } +/** + * End an NTLMSSP state machine + * + * @param ntlmssp_state NTLMSSP State, free()ed by this funciton + */ + NTSTATUS ntlmssp_server_end(NTLMSSP_STATE **ntlmssp_state) { TALLOC_CTX *mem_ctx = (*ntlmssp_state)->mem_ctx; @@ -303,8 +344,17 @@ NTSTATUS ntlmssp_server_end(NTLMSSP_STATE **ntlmssp_state) 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, - DATA_BLOB request, DATA_BLOB *reply) + const DATA_BLOB request, DATA_BLOB *reply) { uint32 ntlmssp_command; *reply = data_blob(NULL, 0); @@ -328,3 +378,251 @@ NTSTATUS ntlmssp_server_update(NTLMSSP_STATE *ntlmssp_state, } } +/********************************************************************* + Client side NTLMSSP +*********************************************************************/ + +/** + * 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. + */ + +static NTSTATUS ntlmssp_client_initial(struct ntlmssp_client_state *ntlmssp_state, + DATA_BLOB reply, DATA_BLOB *next_request) +{ + if (ntlmssp_state->unicode) { + ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_UNICODE; + } + + /* generate the ntlmssp negotiate packet */ + msrpc_gen(next_request, "CddAA", + "NTLMSSP", + NTLMSSP_NEGOTIATE, + ntlmssp_state->neg_flags, + ntlmssp_state->get_domain(), + ntlmssp_state->get_global_myname()); + + return NT_STATUS_MORE_PROCESSING_REQUIRED; +} + +/** + * 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. + */ + +static NTSTATUS ntlmssp_client_challenge(struct ntlmssp_client_state *ntlmssp_state, + const DATA_BLOB reply, DATA_BLOB *next_request) +{ + uint32 chal_flags, ntlmssp_command, unkn1, unkn2; + DATA_BLOB server_domain_blob; + DATA_BLOB challenge_blob; + DATA_BLOB struct_blob; + char *server_domain; + const char *chal_parse_string; + const char *auth_gen_string; + DATA_BLOB lm_response = data_blob(NULL, 0); + DATA_BLOB nt_response = data_blob(NULL, 0); + DATA_BLOB session_key = data_blob(NULL, 0); + uint8 datagram_sess_key[16]; + + ZERO_STRUCT(datagram_sess_key); + + if (!msrpc_parse(&reply, "CdBd", + "NTLMSSP", + &ntlmssp_command, + &server_domain_blob, + &chal_flags)) { + DEBUG(0, ("Failed to parse the NTLMSSP Challenge\n")); + return NT_STATUS_INVALID_PARAMETER; + } + + data_blob_free(&server_domain_blob); + + if (chal_flags & NTLMSSP_NEGOTIATE_UNICODE) { + chal_parse_string = "CdUdbddB"; + 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) { + chal_parse_string = "CdAdbddB"; + 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 (!msrpc_parse(&reply, chal_parse_string, + "NTLMSSP", + &ntlmssp_command, + &server_domain, + &chal_flags, + &challenge_blob, 8, + &unkn1, &unkn2, + &struct_blob)) { + DEBUG(0, ("Failed to parse the NTLMSSP Challenge\n")); + return NT_STATUS_INVALID_PARAMETER; + } + + SAFE_FREE(server_domain); + data_blob_free(&struct_blob); + + if (challenge_blob.length != 8) { + return NT_STATUS_INVALID_PARAMETER; + } + + if (ntlmssp_state->use_ntlmv2) { + + /* TODO: if the remote server is standalone, then we should replace 'domain' + with the server name as supplied above */ + + if (!SMBNTLMv2encrypt(ntlmssp_state->user, + ntlmssp_state->domain, + ntlmssp_state->password, challenge_blob, + &lm_response, &nt_response, &session_key)) { + data_blob_free(&challenge_blob); + return NT_STATUS_NO_MEMORY; + } + } else { + uchar nt_hash[16]; + E_md4hash(ntlmssp_state->password, nt_hash); + + /* non encrypted password supplied. Ignore ntpass. */ + if (lp_client_lanman_auth()) { + lm_response = data_blob(NULL, 24); + SMBencrypt(ntlmssp_state->password,challenge_blob.data, + lm_response.data); + } + + nt_response = data_blob(NULL, 24); + SMBNTencrypt(ntlmssp_state->password,challenge_blob.data, + nt_response.data); + session_key = data_blob(NULL, 16); + SMBsesskeygen_ntv1(nt_hash, NULL, session_key.data); + } + + data_blob_free(&challenge_blob); + + /* this generates the actual auth packet */ + if (!msrpc_gen(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(), + datagram_sess_key, 0, + 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(&lm_response); + data_blob_free(&nt_response); + + ntlmssp_state->session_key = session_key; + + return NT_STATUS_MORE_PROCESSING_REQUIRED; +} + +NTSTATUS ntlmssp_client_start(NTLMSSP_CLIENT_STATE **ntlmssp_state) +{ + TALLOC_CTX *mem_ctx; + + mem_ctx = talloc_init("NTLMSSP Client context"); + + *ntlmssp_state = talloc_zero(mem_ctx, sizeof(**ntlmssp_state)); + if (!*ntlmssp_state) { + DEBUG(0,("ntlmssp_server_start: talloc failed!\n")); + talloc_destroy(mem_ctx); + return NT_STATUS_NO_MEMORY; + } + + ZERO_STRUCTP(*ntlmssp_state); + + (*ntlmssp_state)->mem_ctx = mem_ctx; + + (*ntlmssp_state)->get_global_myname = global_myname; + (*ntlmssp_state)->get_domain = lp_workgroup; + + (*ntlmssp_state)->unicode = True; + + (*ntlmssp_state)->neg_flags = + NTLMSSP_NEGOTIATE_128 | + NTLMSSP_NEGOTIATE_NTLM | + NTLMSSP_REQUEST_TARGET; + + return NT_STATUS_OK; +} + +NTSTATUS ntlmssp_client_end(NTLMSSP_CLIENT_STATE **ntlmssp_state) +{ + TALLOC_CTX *mem_ctx = (*ntlmssp_state)->mem_ctx; + + 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) +{ + uint32 ntlmssp_command; + *next_request = data_blob(NULL, 0); + + if (!reply.length) { + return ntlmssp_client_initial(ntlmssp_state, reply, next_request); + } + + if (!msrpc_parse(&reply, "Cd", + "NTLMSSP", + &ntlmssp_command)) { + return NT_STATUS_INVALID_PARAMETER; + } + + if (ntlmssp_command == NTLMSSP_CHALLENGE) { + return ntlmssp_client_challenge(ntlmssp_state, reply, next_request); + } + return NT_STATUS_INVALID_PARAMETER; +} + +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) +{ + 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; +} |