/* Unix SMB/CIFS implementation. Winbind status program. Copyright (C) Tim Potter 2000-2003 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2003-2004 Copyright (C) Francesco Chemolli <kinkie@kame.usr.dsi.unimi.it> 2000 This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ #include "includes.h" #include "utils/ntlm_auth.h" #undef DBGC_CLASS #define DBGC_CLASS DBGC_WINBIND enum ntlm_break { BREAK_NONE, BREAK_LM, BREAK_NT, NO_LM, NO_NT }; /* Authenticate a user with a challenge/response, checking session key and valid authentication types */ /* * Test the normal 'LM and NTLM' combination */ static bool test_lm_ntlm_broken(enum ntlm_break break_which) { bool pass = True; NTSTATUS nt_status; uint32 flags = 0; DATA_BLOB lm_response = data_blob(NULL, 24); DATA_BLOB nt_response = data_blob(NULL, 24); DATA_BLOB session_key = data_blob(NULL, 16); uchar lm_key[8]; uchar user_session_key[16]; uchar lm_hash[16]; uchar nt_hash[16]; DATA_BLOB chall = get_challenge(); char *error_string; ZERO_STRUCT(lm_key); ZERO_STRUCT(user_session_key); flags |= WBFLAG_PAM_LMKEY; flags |= WBFLAG_PAM_USER_SESSION_KEY; SMBencrypt(opt_password,chall.data,lm_response.data); E_deshash(opt_password, lm_hash); SMBNTencrypt(opt_password,chall.data,nt_response.data); E_md4hash(opt_password, nt_hash); SMBsesskeygen_ntv1(nt_hash, NULL, session_key.data); switch (break_which) { case BREAK_NONE: break; case BREAK_LM: lm_response.data[0]++; break; case BREAK_NT: nt_response.data[0]++; break; case NO_LM: data_blob_free(&lm_response); break; case NO_NT: data_blob_free(&nt_response); break; } nt_status = contact_winbind_auth_crap(opt_username, opt_domain, opt_workstation, &chall, &lm_response, &nt_response, flags, lm_key, user_session_key, &error_string, NULL); data_blob_free(&lm_response); if (!NT_STATUS_IS_OK(nt_status)) { d_printf("%s (0x%x)\n", error_string, NT_STATUS_V(nt_status)); SAFE_FREE(error_string); return break_which == BREAK_NT; } if (memcmp(lm_hash, lm_key, sizeof(lm_key)) != 0) { DEBUG(1, ("LM Key does not match expectations!\n")); DEBUG(1, ("lm_key:\n")); dump_data(1, lm_key, 8); DEBUG(1, ("expected:\n")); dump_data(1, lm_hash, 8); pass = False; } if (break_which == NO_NT) { if (memcmp(lm_hash, user_session_key, 8) != 0) { DEBUG(1, ("NT Session Key does not match expectations (should be LM hash)!\n")); DEBUG(1, ("user_session_key:\n")); dump_data(1, user_session_key, sizeof(user_session_key)); DEBUG(1, ("expected:\n")); dump_data(1, lm_hash, sizeof(lm_hash)); pass = False; } } else { if (memcmp(session_key.data, user_session_key, sizeof(user_session_key)) != 0) { DEBUG(1, ("NT Session Key does not match expectations!\n")); DEBUG(1, ("user_session_key:\n")); dump_data(1, user_session_key, 16); DEBUG(1, ("expected:\n")); dump_data(1, session_key.data, session_key.length); pass = False; } } return pass; } /* * Test LM authentication, no NT response supplied */ static bool test_lm(void) { return test_lm_ntlm_broken(NO_NT); } /* * Test the NTLM response only, no LM. */ static bool test_ntlm(void) { return test_lm_ntlm_broken(NO_LM); } /* * Test the NTLM response only, but in the LM field. */ static bool test_ntlm_in_lm(void) { bool pass = True; NTSTATUS nt_status; uint32 flags = 0; DATA_BLOB nt_response = data_blob(NULL, 24); uchar lm_key[8]; uchar lm_hash[16]; uchar user_session_key[16]; DATA_BLOB chall = get_challenge(); char *error_string; ZERO_STRUCT(user_session_key); flags |= WBFLAG_PAM_LMKEY; flags |= WBFLAG_PAM_USER_SESSION_KEY; SMBNTencrypt(opt_password,chall.data,nt_response.data); E_deshash(opt_password, lm_hash); nt_status = contact_winbind_auth_crap(opt_username, opt_domain, opt_workstation, &chall, &nt_response, NULL, flags, lm_key, user_session_key, &error_string, NULL); data_blob_free(&nt_response); if (!NT_STATUS_IS_OK(nt_status)) { d_printf("%s (0x%x)\n", error_string, NT_STATUS_V(nt_status)); SAFE_FREE(error_string); return False; } if (memcmp(lm_hash, lm_key, sizeof(lm_key)) != 0) { DEBUG(1, ("LM Key does not match expectations!\n")); DEBUG(1, ("lm_key:\n")); dump_data(1, lm_key, 8); DEBUG(1, ("expected:\n")); dump_data(1, lm_hash, 8); pass = False; } if (memcmp(lm_hash, user_session_key, 8) != 0) { DEBUG(1, ("Session Key (first 8 lm hash) does not match expectations!\n")); DEBUG(1, ("user_session_key:\n")); dump_data(1, user_session_key, 16); DEBUG(1, ("expected:\n")); dump_data(1, lm_hash, 8); pass = False; } return pass; } /* * Test the NTLM response only, but in the both the NT and LM fields. */ static bool test_ntlm_in_both(void) { bool pass = True; NTSTATUS nt_status; uint32 flags = 0; DATA_BLOB nt_response = data_blob(NULL, 24); DATA_BLOB session_key = data_blob(NULL, 16); uint8 lm_key[8]; uint8 lm_hash[16]; uint8 user_session_key[16]; uint8 nt_hash[16]; DATA_BLOB chall = get_challenge(); char *error_string; ZERO_STRUCT(lm_key); ZERO_STRUCT(user_session_key); flags |= WBFLAG_PAM_LMKEY; flags |= WBFLAG_PAM_USER_SESSION_KEY; SMBNTencrypt(opt_password,chall.data,nt_response.data); E_md4hash(opt_password, nt_hash); SMBsesskeygen_ntv1(nt_hash, NULL, session_key.data); E_deshash(opt_password, lm_hash); nt_status = contact_winbind_auth_crap(opt_username, opt_domain, opt_workstation, &chall, &nt_response, &nt_response, flags, lm_key, user_session_key, &error_string, NULL); data_blob_free(&nt_response); if (!NT_STATUS_IS_OK(nt_status)) { d_printf("%s (0x%x)\n", error_string, NT_STATUS_V(nt_status)); SAFE_FREE(error_string); return False; } if (memcmp(lm_hash, lm_key, sizeof(lm_key)) != 0) { DEBUG(1, ("LM Key does not match expectations!\n")); DEBUG(1, ("lm_key:\n")); dump_data(1, lm_key, 8); DEBUG(1, ("expected:\n")); dump_data(1, lm_hash, 8); pass = False; } if (memcmp(session_key.data, user_session_key, sizeof(user_session_key)) != 0) { DEBUG(1, ("NT Session Key does not match expectations!\n")); DEBUG(1, ("user_session_key:\n")); dump_data(1, user_session_key, 16); DEBUG(1, ("expected:\n")); dump_data(1, session_key.data, session_key.length); pass = False; } return pass; } /* * Test the NTLMv2 and LMv2 responses */ static bool test_lmv2_ntlmv2_broken(enum ntlm_break break_which) { bool pass = True; NTSTATUS nt_status; uint32 flags = 0; DATA_BLOB ntlmv2_response = data_blob_null; DATA_BLOB lmv2_response = data_blob_null; DATA_BLOB ntlmv2_session_key = data_blob_null; DATA_BLOB names_blob = NTLMv2_generate_names_blob(get_winbind_netbios_name(), get_winbind_domain()); uchar user_session_key[16]; DATA_BLOB chall = get_challenge(); char *error_string; ZERO_STRUCT(user_session_key); flags |= WBFLAG_PAM_USER_SESSION_KEY; if (!SMBNTLMv2encrypt(opt_username, opt_domain, opt_password, &chall, &names_blob, &lmv2_response, &ntlmv2_response, &ntlmv2_session_key)) { data_blob_free(&names_blob); return False; } data_blob_free(&names_blob); switch (break_which) { case BREAK_NONE: break; case BREAK_LM: lmv2_response.data[0]++; break; case BREAK_NT: ntlmv2_response.data[0]++; break; case NO_LM: data_blob_free(&lmv2_response); break; case NO_NT: data_blob_free(&ntlmv2_response); break; } nt_status = contact_winbind_auth_crap(opt_username, opt_domain, opt_workstation, &chall, &lmv2_response, &ntlmv2_response, flags, NULL, user_session_key, &error_string, NULL); data_blob_free(&lmv2_response); data_blob_free(&ntlmv2_response); if (!NT_STATUS_IS_OK(nt_status)) { d_printf("%s (0x%x)\n", error_string, NT_STATUS_V(nt_status)); SAFE_FREE(error_string); return break_which == BREAK_NT; } if (break_which != NO_NT && break_which != BREAK_NT && memcmp(ntlmv2_session_key.data, user_session_key, sizeof(user_session_key)) != 0) { DEBUG(1, ("USER (NTLMv2) Session Key does not match expectations!\n")); DEBUG(1, ("user_session_key:\n")); dump_data(1, user_session_key, 16); DEBUG(1, ("expected:\n")); dump_data(1, ntlmv2_session_key.data, ntlmv2_session_key.length); pass = False; } return pass; } /* * Test the NTLMv2 and LMv2 responses */ static bool test_lmv2_ntlmv2(void) { return test_lmv2_ntlmv2_broken(BREAK_NONE); } /* * Test the LMv2 response only */ static bool test_lmv2(void) { return test_lmv2_ntlmv2_broken(NO_NT); } /* * Test the NTLMv2 response only */ static bool test_ntlmv2(void) { return test_lmv2_ntlmv2_broken(NO_LM); } static bool test_lm_ntlm(void) { return test_lm_ntlm_broken(BREAK_NONE); } static bool test_ntlm_lm_broken(void) { return test_lm_ntlm_broken(BREAK_LM); } static bool test_ntlm_ntlm_broken(void) { return test_lm_ntlm_broken(BREAK_NT); } static bool test_ntlmv2_lmv2_broken(void) { return test_lmv2_ntlmv2_broken(BREAK_LM); } static bool test_ntlmv2_ntlmv2_broken(void) { return test_lmv2_ntlmv2_broken(BREAK_NT); } static bool test_plaintext(enum ntlm_break break_which) { NTSTATUS nt_status; uint32 flags = 0; DATA_BLOB nt_response = data_blob_null; DATA_BLOB lm_response = data_blob_null; char *password; smb_ucs2_t *nt_response_ucs2; uchar user_session_key[16]; uchar lm_key[16]; static const uchar zeros[8] = { 0, }; DATA_BLOB chall = data_blob(zeros, sizeof(zeros)); char *error_string; ZERO_STRUCT(user_session_key); flags |= WBFLAG_PAM_LMKEY; flags |= WBFLAG_PAM_USER_SESSION_KEY; if ((push_ucs2_allocate(&nt_response_ucs2, opt_password)) == -1) { DEBUG(0, ("push_ucs2_allocate failed!\n")); exit(1); } nt_response.data = (unsigned char *)nt_response_ucs2; nt_response.length = strlen_w(nt_response_ucs2)*sizeof(smb_ucs2_t); if ((password = strdup_upper(opt_password)) == NULL) { DEBUG(0, ("strdup_upper failed!\n")); exit(1); } if ((convert_string_allocate(NULL, CH_UNIX, CH_DOS, password, strlen(password)+1, &lm_response.data,True)) == -1) { DEBUG(0, ("convert_string_allocate failed!\n")); exit(1); } SAFE_FREE(password); lm_response.length = strlen((const char *)lm_response.data); switch (break_which) { case BREAK_NONE: break; case BREAK_LM: lm_response.data[0]++; break; case BREAK_NT: nt_response.data[0]++; break; case NO_LM: SAFE_FREE(lm_response.data); lm_response.length = 0; break; case NO_NT: SAFE_FREE(nt_response.data); nt_response.length = 0; break; } nt_status = contact_winbind_auth_crap(opt_username, opt_domain, opt_workstation, &chall, &lm_response, &nt_response, flags, lm_key, user_session_key, &error_string, NULL); SAFE_FREE(nt_response.data); SAFE_FREE(lm_response.data); data_blob_free(&chall); if (!NT_STATUS_IS_OK(nt_status)) { d_printf("%s (0x%x)\n", error_string, NT_STATUS_V(nt_status)); SAFE_FREE(error_string); return break_which == BREAK_NT; } return break_which != BREAK_NT; } static bool test_plaintext_none_broken(void) { return test_plaintext(BREAK_NONE); } static bool test_plaintext_lm_broken(void) { return test_plaintext(BREAK_LM); } static bool test_plaintext_nt_broken(void) { return test_plaintext(BREAK_NT); } static bool test_plaintext_nt_only(void) { return test_plaintext(NO_LM); } static bool test_plaintext_lm_only(void) { return test_plaintext(NO_NT); } /* Tests: - LM only - NT and LM - NT - NT in LM field - NT in both fields - NTLMv2 - NTLMv2 and LMv2 - LMv2 - plaintext tests (in challenge-response feilds) check we get the correct session key in each case check what values we get for the LM session key */ static const struct ntlm_tests { bool (*fn)(void); const char *name; } test_table[] = { {test_lm, "LM"}, {test_lm_ntlm, "LM and NTLM"}, {test_ntlm, "NTLM"}, {test_ntlm_in_lm, "NTLM in LM"}, {test_ntlm_in_both, "NTLM in both"}, {test_ntlmv2, "NTLMv2"}, {test_lmv2_ntlmv2, "NTLMv2 and LMv2"}, {test_lmv2, "LMv2"}, {test_ntlmv2_lmv2_broken, "NTLMv2 and LMv2, LMv2 broken"}, {test_ntlmv2_ntlmv2_broken, "NTLMv2 and LMv2, NTLMv2 broken"}, {test_ntlm_lm_broken, "NTLM and LM, LM broken"}, {test_ntlm_ntlm_broken, "NTLM and LM, NTLM broken"}, {test_plaintext_none_broken, "Plaintext"}, {test_plaintext_lm_broken, "Plaintext LM broken"}, {test_plaintext_nt_broken, "Plaintext NT broken"}, {test_plaintext_nt_only, "Plaintext NT only"}, {test_plaintext_lm_only, "Plaintext LM only"}, {NULL, NULL} }; bool diagnose_ntlm_auth(void) { unsigned int i; bool pass = True; for (i=0; test_table[i].fn; i++) { if (!test_table[i].fn()) { DEBUG(1, ("Test %s failed!\n", test_table[i].name)); pass = False; } } return pass; }