NTSTATUS ntlm_password_check(TALLOC_CTX *mem_ctx, const DATA_BLOB *challenge, const DATA_BLOB *lm_response, const DATA_BLOB *nt_response, const DATA_BLOB *lm_interactive_pwd, const DATA_BLOB *nt_interactive_pwd, const char *username, const char *client_username, const char *client_domain, const uint8 *lm_pw, const uint8 *nt_pw, DATA_BLOB *user_sess_key, DATA_BLOB *lm_sess_key) { static const unsigned char zeros[8]; if (nt_pw == NULL) { DEBUG(3,("ntlm_password_check: NO NT password stored for user %s.\n", username)); } if (nt_interactive_pwd && nt_interactive_pwd->length && nt_pw) { if (nt_interactive_pwd->length != 16) { DEBUG(3,("ntlm_password_check: Interactive logon: Invalid NT password length (%d) supplied for user %s\n", (int)nt_interactive_pwd->length, username)); return NT_STATUS_WRONG_PASSWORD; } if (memcmp(nt_interactive_pwd->data, nt_pw, 16) == 0) { if (user_sess_key) { *user_sess_key = data_blob(NULL, 16); SMBsesskeygen_ntv1(nt_pw, NULL, user_sess_key->data); } return NT_STATUS_OK; } else { DEBUG(3,("ntlm_password_check: Interactive logon: NT password check failed for user %s\n", username)); return NT_STATUS_WRONG_PASSWORD; } } else if (lm_interactive_pwd && lm_interactive_pwd->length && lm_pw) { if (lm_interactive_pwd->length != 16) { DEBUG(3,("ntlm_password_check: Interactive logon: Invalid LANMAN password length (%d) supplied for user %s\n", (int)lm_interactive_pwd->length, username)); return NT_STATUS_WRONG_PASSWORD; } if (!lp_lanman_auth()) { DEBUG(3,("ntlm_password_check: Interactive logon: only LANMAN password supplied for user %s, and LM passwords are disabled!\n", username)); return NT_STATUS_WRONG_PASSWORD; } if (memcmp(lm_interactive_pwd->data, lm_pw, 16) == 0) { return NT_STATUS_OK; } else { DEBUG(3,("ntlm_password_check: Interactive logon: LANMAN password check failed for user %s\n", username)); return NT_STATUS_WRONG_PASSWORD; } } /* Check for cleartext netlogon. Used by Exchange 5.5. */ if (challenge->length == sizeof(zeros) && (memcmp(challenge->data, zeros, challenge->length) == 0 )) { DEBUG(4,("ntlm_password_check: checking plaintext passwords for user %s\n", username)); if (nt_pw && nt_response->length) { unsigned char pwhash[16]; mdfour(pwhash, nt_response->data, nt_response->length); if (memcmp(pwhash, nt_pw, sizeof(pwhash)) == 0) { return NT_STATUS_OK; } else { DEBUG(3,("ntlm_password_check: NT (Unicode) plaintext password check failed for user %s\n", username)); return NT_STATUS_WRONG_PASSWORD; } } else if (!lp_lanman_auth()) { DEBUG(3,("ntlm_password_check: (plaintext password check) LANMAN passwords NOT PERMITTED for user %s\n", username)); } else if (lm_pw && lm_response->length) { uchar dospwd[14]; uchar p16[16]; ZERO_STRUCT(dospwd); memcpy(dospwd, lm_response->data, MIN(lm_response->length, sizeof(dospwd))); /* Only the fisrt 14 chars are considered, password need not be null terminated. */ /* we *might* need to upper-case the string here */ E_P16((const unsigned char *)dospwd, p16); if (memcmp(p16, lm_pw, sizeof(p16)) == 0) { return NT_STATUS_OK; } else { DEBUG(3,("ntlm_password_check: LANMAN (ASCII) plaintext password check failed for user %s\n", username)); return NT_STATUS_WRONG_PASSWORD; } } else { DEBUG(3, ("Plaintext authentication for user %s attempted, but neither NT nor LM passwords available\n", username)); return NT_STATUS_WRONG_PASSWORD; } } if (nt_response->length != 0 && nt_response->length < 24) { DEBUG(2,("ntlm_password_check: invalid NT password length (%lu) for user %s\n", (unsigned long)nt_response->length, username)); } if (nt_response->length >= 24 && nt_pw) { if (nt_response->length > 24) { /* We have the NT MD4 hash challenge available - see if we can use it */ DEBUG(4,("ntlm_password_check: Checking NTLMv2 password with domain [%s]\n", client_domain)); if (smb_pwd_check_ntlmv2( nt_response, nt_pw, challenge, client_username, client_domain, False, user_sess_key)) { return NT_STATUS_OK; } DEBUG(4,("ntlm_password_check: Checking NTLMv2 password with uppercased version of domain [%s]\n", client_domain)); if (smb_pwd_check_ntlmv2( nt_response, nt_pw, challenge, client_username, client_domain, True, user_sess_key)) { return NT_STATUS_OK; } DEBUG(4,("ntlm_password_check: Checking NTLMv2 password without a domain\n")); if (smb_pwd_check_ntlmv2( nt_response, nt_pw, challenge, client_username, "", False, user_sess_key)) { return NT_STATUS_OK; } else { DEBUG(3,("ntlm_password_check: NTLMv2 password check failed\n")); return NT_STATUS_WRONG_PASSWORD; } } if (lp_ntlm_auth()) { /* We have the NT MD4 hash challenge available - see if we can use it (ie. does it exist in the smbpasswd file). */ DEBUG(4,("ntlm_password_check: Checking NT MD4 password\n")); if (smb_pwd_check_ntlmv1(nt_response, nt_pw, challenge, user_sess_key)) { /* The LM session key for this response is not very secure, so use it only if we otherwise allow LM authentication */ if (lp_lanman_auth() && lm_pw) { uint8 first_8_lm_hash[16]; memcpy(first_8_lm_hash, lm_pw, 8); memset(first_8_lm_hash + 8, '\0', 8); if (lm_sess_key) { *lm_sess_key = data_blob(first_8_lm_hash, 16); } } return NT_STATUS_OK; } else { DEBUG(3,("ntlm_password_check: NT MD4 password check failed for user %s\n", username)); return NT_STATUS_WRONG_PASSWORD; } } else { DEBUG(2,("ntlm_password_check: NTLMv1 passwords NOT PERMITTED for user %s\n", username)); /* no return, becouse we might pick up LMv2 in the LM field */ } } if (lm_response->length == 0) { DEBUG(3,("ntlm_password_check: NEITHER LanMan nor NT password supplied for user %s\n", username)); return NT_STATUS_WRONG_PASSWORD; } if (lm_response->length < 24) { DEBUG(2,("ntlm_password_check: invalid LanMan password length (%lu) for user %s\n", (unsigned long)nt_response->length, username)); return NT_STATUS_WRONG_PASSWORD; } if (!lp_lanman_auth()) { DEBUG(3,("ntlm_password_check: Lanman passwords NOT PERMITTED for user %s\n", username)); } else if (!lm_pw) { DEBUG(3,("ntlm_password_check: NO LanMan password set for user %s (and no NT password supplied)\n", username)); } else { DEBUG(4,("ntlm_password_check: Checking LM password\n")); if (smb_pwd_check_ntlmv1(lm_response, lm_pw, challenge, NULL)) { uint8 first_8_lm_hash[16]; memcpy(first_8_lm_hash, lm_pw, 8); memset(first_8_lm_hash + 8, '\0', 8); if (user_sess_key) { *user_sess_key = data_blob(first_8_lm_hash, 16); } if (lm_sess_key) { *lm_sess_key = data_blob(first_8_lm_hash, 16); } return NT_STATUS_OK; } } if (!nt_pw) { DEBUG(4,("ntlm_password_check: LM password check failed for user, no NT password %s\n",username)); return NT_STATUS_WRONG_PASSWORD; } /* This is for 'LMv2' authentication. almost NTLMv2 but limited to 24 bytes. - related to Win9X, legacy NAS pass-though authentication */ DEBUG(4,("ntlm_password_check: Checking LMv2 password with domain %s\n", client_domain)); if (smb_pwd_check_ntlmv2( lm_response, nt_pw, challenge, client_username, client_domain, False, NULL)) { return NT_STATUS_OK; } DEBUG(4,("ntlm_password_check: Checking LMv2 password with upper-cased version of domain %s\n", client_domain)); if (smb_pwd_check_ntlmv2( lm_response, nt_pw, challenge, client_username, client_domain, True, NULL)) { return NT_STATUS_OK; } DEBUG(4,("ntlm_password_check: Checking LMv2 password without a domain\n")); if (smb_pwd_check_ntlmv2( lm_response, nt_pw, challenge, client_username, "", False, NULL)) { return NT_STATUS_OK; } /* Apparently NT accepts NT responses in the LM field - I think this is related to Win9X pass-though authentication */ DEBUG(4,("ntlm_password_check: Checking NT MD4 password in LM field\n")); if (lp_ntlm_auth()) { if (smb_pwd_check_ntlmv1(lm_response, nt_pw, challenge, NULL)) { /* The session key for this response is still very odd. It not very secure, so use it only if we otherwise allow LM authentication */ if (lp_lanman_auth() && lm_pw) { uint8 first_8_lm_hash[16]; memcpy(first_8_lm_hash, lm_pw, 8); memset(first_8_lm_hash + 8, '\0', 8); if (user_sess_key) { *user_sess_key = data_blob(first_8_lm_hash, 16); } if (lm_sess_key) { *lm_sess_key = data_blob(first_8_lm_hash, 16); } } return NT_STATUS_OK; } DEBUG(3,("ntlm_password_check: LM password, NT MD4 password in LM field and LMv2 failed for user %s\n",username)); } else { DEBUG(3,("ntlm_password_check: LM password and LMv2 failed for user %s, and NT MD4 password in LM field not permitted\n",username)); } return NT_STATUS_WRONG_PASSWORD; }
static NTSTATUS sam_password_ok(TALLOC_CTX *mem_ctx, const char *username, uint32_t acct_ctrl, const DATA_BLOB *challenge, const uint8_t *lm_pw, const uint8_t *nt_pw, const struct auth_usersupplied_info *user_info, DATA_BLOB *user_sess_key, DATA_BLOB *lm_sess_key) { NTSTATUS status; struct samr_Password _lm_hash, _nt_hash; struct samr_Password *lm_hash = NULL; struct samr_Password *nt_hash = NULL; *user_sess_key = data_blob_null; *lm_sess_key = data_blob_null; if (acct_ctrl & ACB_PWNOTREQ) { if (lp_null_passwords()) { DEBUG(3,("Account for user '%s' has no password and null passwords are allowed.\n", username)); return NT_STATUS_OK; } else { DEBUG(3,("Account for user '%s' has no password and null passwords are NOT allowed.\n", username)); return NT_STATUS_LOGON_FAILURE; } } if (lm_pw) { memcpy(_lm_hash.hash, lm_pw, sizeof(_lm_hash.hash)); lm_hash = &_lm_hash; } if (nt_pw) { memcpy(_nt_hash.hash, nt_pw, sizeof(_nt_hash.hash)); nt_hash = &_nt_hash; } switch (user_info->password_state) { case AUTH_PASSWORD_HASH: status = hash_password_check(mem_ctx, lp_lanman_auth(), user_info->password.hash.lanman, user_info->password.hash.nt, username, lm_hash, nt_hash); if (NT_STATUS_IS_OK(status)) { if (nt_pw) { *user_sess_key = data_blob_talloc(mem_ctx, NULL, 16); if (!user_sess_key->data) { return NT_STATUS_NO_MEMORY; } SMBsesskeygen_ntv1(nt_pw, user_sess_key->data); } } return status; /* Eventually we should test plaintext passwords in their own * function, not assuming the caller has done a * mapping */ case AUTH_PASSWORD_PLAIN: case AUTH_PASSWORD_RESPONSE: return ntlm_password_check(mem_ctx, lp_lanman_auth(), lp_ntlm_auth(), user_info->logon_parameters, challenge, &user_info->password.response.lanman, &user_info->password.response.nt, username, user_info->client.account_name, user_info->client.domain_name, lm_hash, nt_hash, user_sess_key, lm_sess_key); default: DEBUG(0,("user_info constructed for user '%s' was invalid - password_state=%u invalid.\n", username, user_info->password_state)); return NT_STATUS_INTERNAL_ERROR; } }
/**************************************************************************** Do a specific test for an smb password being correct, given a smb_password and the lanman and NT responses. ****************************************************************************/ static NTSTATUS authsam_password_ok(struct auth_context *auth_context, TALLOC_CTX *mem_ctx, uint16_t acct_flags, const struct samr_Password *lm_pwd, const struct samr_Password *nt_pwd, const struct auth_usersupplied_info *user_info, DATA_BLOB *user_sess_key, DATA_BLOB *lm_sess_key) { NTSTATUS status; switch (user_info->password_state) { case AUTH_PASSWORD_PLAIN: { const struct auth_usersupplied_info *user_info_temp; status = encrypt_user_info(mem_ctx, auth_context, AUTH_PASSWORD_HASH, user_info, &user_info_temp); if (!NT_STATUS_IS_OK(status)) { DEBUG(1, ("Failed to convert plaintext password to password HASH: %s\n", nt_errstr(status))); return status; } user_info = user_info_temp; /*fall through*/ } case AUTH_PASSWORD_HASH: *lm_sess_key = data_blob(NULL, 0); *user_sess_key = data_blob(NULL, 0); status = hash_password_check(mem_ctx, lp_lanman_auth(auth_context->lp_ctx), user_info->password.hash.lanman, user_info->password.hash.nt, user_info->mapped.account_name, lm_pwd, nt_pwd); NT_STATUS_NOT_OK_RETURN(status); break; case AUTH_PASSWORD_RESPONSE: status = ntlm_password_check(mem_ctx, lp_lanman_auth(auth_context->lp_ctx), lp_ntlm_auth(auth_context->lp_ctx), user_info->logon_parameters, &auth_context->challenge.data, &user_info->password.response.lanman, &user_info->password.response.nt, user_info->mapped.account_name, user_info->client.account_name, user_info->client.domain_name, lm_pwd, nt_pwd, user_sess_key, lm_sess_key); NT_STATUS_NOT_OK_RETURN(status); break; } if (user_sess_key && user_sess_key->data) { talloc_steal(auth_context, user_sess_key->data); } if (lm_sess_key && lm_sess_key->data) { talloc_steal(auth_context, lm_sess_key->data); } return NT_STATUS_OK; }