static ADS_STATUS ads_sasl_gssapi_bind(ADS_STRUCT *ads) { ADS_STATUS status; struct ads_service_principal p; status = ads_generate_service_principal(ads, &p); if (!ADS_ERR_OK(status)) { return status; } if (ads->auth.password == NULL || ads->auth.password[0] == '\0') { status = ads_sasl_gssapi_do_bind(ads, p.name); if (ADS_ERR_OK(status)) { ads_free_service_principal(&p); return status; } DEBUG(10,("ads_sasl_gssapi_do_bind failed with: %s, " "calling kinit\n", ads_errstr(status))); } status = ADS_ERROR_KRB5(ads_kinit_password(ads)); if (ADS_ERR_OK(status)) { status = ads_sasl_gssapi_do_bind(ads, p.name); } ads_free_service_principal(&p); return status; }
/* perform a LDAP/SASL/SPNEGO/KRB5 bind */ static ADS_STATUS ads_sasl_spnego_rawkrb5_bind(ADS_STRUCT *ads, const char *principal) { DATA_BLOB blob = data_blob_null; struct berval cred, *scred = NULL; DATA_BLOB session_key = data_blob_null; int rc; if (ads->ldap.wrap_type > ADS_SASLWRAP_TYPE_PLAIN) { return ADS_ERROR_NT(NT_STATUS_NOT_SUPPORTED); } rc = spnego_gen_negTokenTarg(principal, ads->auth.time_offset, &blob, &session_key, 0, &ads->auth.tgs_expire); if (rc) { return ADS_ERROR_KRB5(rc); } /* now send the auth packet and we should be done */ cred.bv_val = (char *)blob.data; cred.bv_len = blob.length; rc = ldap_sasl_bind_s(ads->ldap.ld, NULL, "GSS-SPNEGO", &cred, NULL, NULL, &scred); data_blob_free(&blob); data_blob_free(&session_key); if(scred) ber_bvfree(scred); return ADS_ERROR(rc); }
static ADS_STATUS ads_init_gssapi_cred(ADS_STRUCT *ads, gss_cred_id_t *cred) { ADS_STATUS status; krb5_context kctx; krb5_error_code kerr; krb5_ccache kccache = NULL; uint32_t maj, min; *cred = GSS_C_NO_CREDENTIAL; if (!ads->auth.ccache_name) { return ADS_SUCCESS; } kerr = krb5_init_context(&kctx); if (kerr) { return ADS_ERROR_KRB5(kerr); } kerr = krb5_cc_resolve(kctx, ads->auth.ccache_name, &kccache); if (kerr) { status = ADS_ERROR_KRB5(kerr); goto done; } maj = smb_gss_krb5_import_cred(&min, kctx, kccache, NULL, NULL, cred); if (maj != GSS_S_COMPLETE) { status = ADS_ERROR_GSS(maj, min); goto done; } status = ADS_SUCCESS; done: if (!ADS_ERR_OK(status) && kccache != NULL) { krb5_cc_close(kctx, kccache); } krb5_free_context(kctx); return status; }
ADS_STATUS kerberos_set_password(const char *kpasswd_server, const char *auth_principal, const char *auth_password, const char *target_principal, const char *new_password, int time_offset) { int ret; if ((ret = kerberos_kinit_password(auth_principal, auth_password, time_offset, NULL))) { DEBUG(1,("Failed kinit for principal %s (%s)\n", auth_principal, error_message(ret))); return ADS_ERROR_KRB5(ret); } if (!strcmp(auth_principal, target_principal)) return ads_krb5_chg_password(kpasswd_server, target_principal, auth_password, new_password, time_offset); else return ads_krb5_set_password(kpasswd_server, target_principal, new_password, time_offset); }
/* this performs a SASL/SPNEGO bind */ static ADS_STATUS ads_sasl_spnego_bind(ADS_STRUCT *ads) { TALLOC_CTX *frame = talloc_stackframe(); struct ads_service_principal p = {0}; struct berval *scred=NULL; int rc, i; ADS_STATUS status; DATA_BLOB blob = data_blob_null; char *given_principal = NULL; char *OIDs[ASN1_MAX_OIDS]; #ifdef HAVE_KRB5 bool got_kerberos_mechanism = False; #endif const char *mech = NULL; rc = ldap_sasl_bind_s(ads->ldap.ld, NULL, "GSS-SPNEGO", NULL, NULL, NULL, &scred); if (rc != LDAP_SASL_BIND_IN_PROGRESS) { status = ADS_ERROR(rc); goto done; } blob = data_blob(scred->bv_val, scred->bv_len); ber_bvfree(scred); #if 0 file_save("sasl_spnego.dat", blob.data, blob.length); #endif /* the server sent us the first part of the SPNEGO exchange in the negprot reply */ if (!spnego_parse_negTokenInit(talloc_tos(), blob, OIDs, &given_principal, NULL) || OIDs[0] == NULL) { status = ADS_ERROR(LDAP_OPERATIONS_ERROR); goto done; } TALLOC_FREE(given_principal); /* make sure the server understands kerberos */ for (i=0;OIDs[i];i++) { DEBUG(3,("ads_sasl_spnego_bind: got OID=%s\n", OIDs[i])); #ifdef HAVE_KRB5 if (strcmp(OIDs[i], OID_KERBEROS5_OLD) == 0 || strcmp(OIDs[i], OID_KERBEROS5) == 0) { got_kerberos_mechanism = True; } #endif talloc_free(OIDs[i]); } status = ads_generate_service_principal(ads, &p); if (!ADS_ERR_OK(status)) { goto done; } #ifdef HAVE_KRB5 if (!(ads->auth.flags & ADS_AUTH_DISABLE_KERBEROS) && got_kerberos_mechanism) { mech = "KRB5"; if (ads->auth.password == NULL || ads->auth.password[0] == '\0') { status = ads_sasl_spnego_gensec_bind(ads, "GSS-SPNEGO", CRED_MUST_USE_KERBEROS, p.service, p.hostname, blob); if (ADS_ERR_OK(status)) { ads_free_service_principal(&p); goto done; } DEBUG(10,("ads_sasl_spnego_gensec_bind(KRB5) failed with: %s, " "calling kinit\n", ads_errstr(status))); } status = ADS_ERROR_KRB5(ads_kinit_password(ads)); if (ADS_ERR_OK(status)) { status = ads_sasl_spnego_gensec_bind(ads, "GSS-SPNEGO", CRED_MUST_USE_KERBEROS, p.service, p.hostname, blob); if (!ADS_ERR_OK(status)) { DEBUG(0,("kinit succeeded but " "ads_sasl_spnego_gensec_bind(KRB5) failed " "for %s/%s with user[%s] realm[%s]: %s\n", p.service, p.hostname, ads->auth.user_name, ads->auth.realm, ads_errstr(status))); } } /* only fallback to NTLMSSP if allowed */ if (ADS_ERR_OK(status) || !(ads->auth.flags & ADS_AUTH_ALLOW_NTLMSSP)) { goto done; } DEBUG(1,("ads_sasl_spnego_gensec_bind(KRB5) failed " "for %s/%s with user[%s] realm[%s]: %s, " "fallback to NTLMSSP\n", p.service, p.hostname, ads->auth.user_name, ads->auth.realm, ads_errstr(status))); } #endif /* lets do NTLMSSP ... this has the big advantage that we don't need to sync clocks, and we don't rely on special versions of the krb5 library for HMAC_MD4 encryption */ mech = "NTLMSSP"; status = ads_sasl_spnego_gensec_bind(ads, "GSS-SPNEGO", CRED_DONT_USE_KERBEROS, p.service, p.hostname, data_blob_null); done: if (!ADS_ERR_OK(status)) { DEBUG(1,("ads_sasl_spnego_gensec_bind(%s) failed " "for %s/%s with user[%s] realm=[%s]: %s\n", mech, p.service, p.hostname, ads->auth.user_name, ads->auth.realm, ads_errstr(status))); } ads_free_service_principal(&p); TALLOC_FREE(frame); if (blob.data != NULL) { data_blob_free(&blob); } return status; }
/* this performs a SASL/SPNEGO bind */ static ADS_STATUS ads_sasl_spnego_bind(ADS_STRUCT *ads) { struct berval *scred=NULL; int rc, i; ADS_STATUS status; DATA_BLOB blob; char *given_principal = NULL; char *OIDs[ASN1_MAX_OIDS]; #ifdef HAVE_KRB5 bool got_kerberos_mechanism = False; #endif rc = ldap_sasl_bind_s(ads->ldap.ld, NULL, "GSS-SPNEGO", NULL, NULL, NULL, &scred); if (rc != LDAP_SASL_BIND_IN_PROGRESS) { status = ADS_ERROR(rc); goto failed; } blob = data_blob(scred->bv_val, scred->bv_len); ber_bvfree(scred); #if 0 file_save("sasl_spnego.dat", blob.data, blob.length); #endif /* the server sent us the first part of the SPNEGO exchange in the negprot reply */ if (!spnego_parse_negTokenInit(blob, OIDs, &given_principal)) { data_blob_free(&blob); status = ADS_ERROR(LDAP_OPERATIONS_ERROR); goto failed; } data_blob_free(&blob); /* make sure the server understands kerberos */ for (i=0;OIDs[i];i++) { DEBUG(3,("ads_sasl_spnego_bind: got OID=%s\n", OIDs[i])); #ifdef HAVE_KRB5 if (strcmp(OIDs[i], OID_KERBEROS5_OLD) == 0 || strcmp(OIDs[i], OID_KERBEROS5) == 0) { got_kerberos_mechanism = True; } #endif talloc_free(OIDs[i]); } DEBUG(3,("ads_sasl_spnego_bind: got server principal name = %s\n", given_principal)); #ifdef HAVE_KRB5 if (!(ads->auth.flags & ADS_AUTH_DISABLE_KERBEROS) && got_kerberos_mechanism) { struct ads_service_principal p; status = ads_generate_service_principal(ads, given_principal, &p); TALLOC_FREE(given_principal); if (!ADS_ERR_OK(status)) { return status; } status = ads_sasl_spnego_krb5_bind(ads, &p); if (ADS_ERR_OK(status)) { ads_free_service_principal(&p); return status; } DEBUG(10,("ads_sasl_spnego_krb5_bind failed with: %s, " "calling kinit\n", ads_errstr(status))); status = ADS_ERROR_KRB5(ads_kinit_password(ads)); if (ADS_ERR_OK(status)) { status = ads_sasl_spnego_krb5_bind(ads, &p); if (!ADS_ERR_OK(status)) { DEBUG(0,("kinit succeeded but " "ads_sasl_spnego_krb5_bind failed: %s\n", ads_errstr(status))); } } ads_free_service_principal(&p); /* only fallback to NTLMSSP if allowed */ if (ADS_ERR_OK(status) || !(ads->auth.flags & ADS_AUTH_ALLOW_NTLMSSP)) { return status; } } else #endif { TALLOC_FREE(given_principal); } /* lets do NTLMSSP ... this has the big advantage that we don't need to sync clocks, and we don't rely on special versions of the krb5 library for HMAC_MD4 encryption */ return ads_sasl_spnego_ntlmssp_bind(ads); failed: return status; }
static ADS_STATUS ads_init_gssapi_cred(ADS_STRUCT *ads, gss_cred_id_t *cred) { ADS_STATUS status; krb5_context kctx; krb5_error_code kerr; krb5_ccache kccache = NULL; uint32_t maj, min; *cred = GSS_C_NO_CREDENTIAL; if (!ads->auth.ccache_name) { return ADS_SUCCESS; } kerr = krb5_init_context(&kctx); if (kerr) { return ADS_ERROR_KRB5(kerr); } #ifdef HAVE_GSS_KRB5_IMPORT_CRED kerr = krb5_cc_resolve(kctx, ads->auth.ccache_name, &kccache); if (kerr) { status = ADS_ERROR_KRB5(kerr); goto done; } maj = gss_krb5_import_cred(&min, kccache, NULL, NULL, cred); if (maj != GSS_S_COMPLETE) { status = ADS_ERROR_GSS(maj, min); goto done; } #else /* We need to fallback to overriding the default creds. * This operation is not thread safe as it changes the process * environment variable, but we do not have any better option * with older kerberos libraries */ { const char *oldccname = NULL; oldccname = getenv("KRB5CCNAME"); setenv("KRB5CCNAME", ads->auth.ccache_name, 1); maj = gss_acquire_cred(&min, GSS_C_NO_NAME, GSS_C_INDEFINITE, NULL, GSS_C_INITIATE, cred, NULL, NULL); if (oldccname) { setenv("KRB5CCNAME", oldccname, 1); } else { unsetenv("KRB5CCNAME"); } if (maj != GSS_S_COMPLETE) { status = ADS_ERROR_GSS(maj, min); goto done; } } #endif status = ADS_SUCCESS; done: if (!ADS_ERR_OK(status) && kccache != NULL) { krb5_cc_close(kctx, kccache); } krb5_free_context(kctx); return status; }
ADS_STATUS ads_krb5_set_password(const char *kdc_host, const char *princ, const char *newpw, int time_offset) { ADS_STATUS aret; krb5_error_code ret = 0; krb5_context context = NULL; const char *realm = NULL; unsigned int realm_len = 0; krb5_creds creds, *credsp = NULL; krb5_ccache ccache = NULL; ZERO_STRUCT(creds); initialize_krb5_error_table(); ret = krb5_init_context(&context); if (ret) { DEBUG(1,("Failed to init krb5 context (%s)\n", error_message(ret))); return ADS_ERROR_KRB5(ret); } if (time_offset != 0) { krb5_set_real_time(context, time(NULL) + time_offset, 0); } ret = krb5_cc_default(context, &ccache); if (ret) { krb5_free_context(context); DEBUG(1,("Failed to get default creds (%s)\n", error_message(ret))); return ADS_ERROR_KRB5(ret); } ret = krb5_cc_get_principal(context, ccache, &creds.client); if (ret) { krb5_cc_close(context, ccache); krb5_free_context(context); DEBUG(1,("Failed to get principal from ccache (%s)\n", error_message(ret))); return ADS_ERROR_KRB5(ret); } realm = smb_krb5_principal_get_realm(context, creds.client); realm_len = strlen(realm); ret = krb5_build_principal(context, &creds.server, realm_len, realm, "kadmin", "changepw", NULL); ret = krb5_get_credentials(context, 0, ccache, &creds, &credsp); if (ret) { krb5_cc_close(context, ccache); krb5_free_principal(context, creds.client); krb5_free_principal(context, creds.server); krb5_free_context(context); DEBUG(1,("krb5_build_prinipal_ext (%s)\n", error_message(ret))); return ADS_ERROR_KRB5(ret); } ret = krb5_get_credentials(context, 0, ccache, &creds, &credsp); if (ret) { krb5_cc_close(context, ccache); krb5_free_principal(context, creds.client); krb5_free_principal(context, creds.server); krb5_free_context(context); DEBUG(1,("krb5_get_credentials failed (%s)\n", error_message(ret))); return ADS_ERROR_KRB5(ret); } /* we might have to call krb5_free_creds(...) from now on ... */ aret = do_krb5_kpasswd_request(context, kdc_host, KRB5_KPASSWD_VERS_SETPW, credsp, princ, newpw); krb5_free_creds(context, credsp); krb5_free_principal(context, creds.client); krb5_free_principal(context, creds.server); krb5_cc_close(context, ccache); krb5_free_context(context); return aret; }
static ADS_STATUS ads_krb5_chg_password(const char *kdc_host, const char *principal, const char *oldpw, const char *newpw, int time_offset) { ADS_STATUS aret; krb5_error_code ret; krb5_context context = NULL; krb5_principal princ; krb5_get_init_creds_opt opts; krb5_creds creds; char *chpw_princ = NULL, *password; const char *realm = NULL; initialize_krb5_error_table(); ret = krb5_init_context(&context); if (ret) { DEBUG(1,("Failed to init krb5 context (%s)\n", error_message(ret))); return ADS_ERROR_KRB5(ret); } if ((ret = smb_krb5_parse_name(context, principal, &princ))) { krb5_free_context(context); DEBUG(1,("Failed to parse %s (%s)\n", principal, error_message(ret))); return ADS_ERROR_KRB5(ret); } krb5_get_init_creds_opt_init(&opts); krb5_get_init_creds_opt_set_tkt_life(&opts, 5*60); krb5_get_init_creds_opt_set_renew_life(&opts, 0); krb5_get_init_creds_opt_set_forwardable(&opts, 0); krb5_get_init_creds_opt_set_proxiable(&opts, 0); realm = smb_krb5_principal_get_realm(context, princ); /* We have to obtain an INITIAL changepw ticket for changing password */ if (asprintf(&chpw_princ, "kadmin/changepw@%s", realm) == -1) { krb5_free_context(context); DEBUG(1,("ads_krb5_chg_password: asprintf fail\n")); return ADS_ERROR_NT(NT_STATUS_NO_MEMORY); } password = SMB_STRDUP(oldpw); ret = krb5_get_init_creds_password(context, &creds, princ, password, kerb_prompter, NULL, 0, chpw_princ, &opts); SAFE_FREE(chpw_princ); SAFE_FREE(password); if (ret) { if (ret == KRB5KRB_AP_ERR_BAD_INTEGRITY) DEBUG(1,("Password incorrect while getting initial ticket")); else DEBUG(1,("krb5_get_init_creds_password failed (%s)\n", error_message(ret))); krb5_free_principal(context, princ); krb5_free_context(context); return ADS_ERROR_KRB5(ret); } aret = do_krb5_kpasswd_request(context, kdc_host, KRB5_KPASSWD_VERS_CHANGEPW, &creds, principal, newpw); krb5_free_principal(context, princ); krb5_free_context(context); return aret; }
static ADS_STATUS do_krb5_kpasswd_request(krb5_context context, const char *kdc_host, uint16 pversion, krb5_creds *credsp, const char *princ, const char *newpw) { krb5_auth_context auth_context = NULL; krb5_data ap_req, chpw_req, chpw_rep; int ret, sock; socklen_t addr_len; struct sockaddr_storage remote_addr, local_addr; struct sockaddr_storage addr; krb5_address local_kaddr, remote_kaddr; bool use_tcp = False; if (!interpret_string_addr(&addr, kdc_host, 0)) { } ret = krb5_mk_req_extended(context, &auth_context, AP_OPTS_USE_SUBKEY, NULL, credsp, &ap_req); if (ret) { DEBUG(1,("krb5_mk_req_extended failed (%s)\n", error_message(ret))); return ADS_ERROR_KRB5(ret); } do { if (!use_tcp) { sock = open_udp_socket(kdc_host, DEFAULT_KPASSWD_PORT); if (sock == -1) { int rc = errno; SAFE_FREE(ap_req.data); krb5_auth_con_free(context, auth_context); DEBUG(1,("failed to open kpasswd socket to %s " "(%s)\n", kdc_host, strerror(errno))); return ADS_ERROR_SYSTEM(rc); } } else { NTSTATUS status; status = open_socket_out(&addr, DEFAULT_KPASSWD_PORT, LONG_CONNECT_TIMEOUT, &sock); if (!NT_STATUS_IS_OK(status)) { SAFE_FREE(ap_req.data); krb5_auth_con_free(context, auth_context); DEBUG(1,("failed to open kpasswd socket to %s " "(%s)\n", kdc_host, nt_errstr(status))); return ADS_ERROR_NT(status); } } addr_len = sizeof(remote_addr); if (getpeername(sock, (struct sockaddr *)&remote_addr, &addr_len) != 0) { close(sock); SAFE_FREE(ap_req.data); krb5_auth_con_free(context, auth_context); DEBUG(1,("getpeername() failed (%s)\n", error_message(errno))); return ADS_ERROR_SYSTEM(errno); } addr_len = sizeof(local_addr); if (getsockname(sock, (struct sockaddr *)&local_addr, &addr_len) != 0) { close(sock); SAFE_FREE(ap_req.data); krb5_auth_con_free(context, auth_context); DEBUG(1,("getsockname() failed (%s)\n", error_message(errno))); return ADS_ERROR_SYSTEM(errno); } if (!setup_kaddr(&remote_kaddr, &remote_addr) || !setup_kaddr(&local_kaddr, &local_addr)) { DEBUG(1,("do_krb5_kpasswd_request: " "Failed to setup addresses.\n")); close(sock); SAFE_FREE(ap_req.data); krb5_auth_con_free(context, auth_context); errno = EINVAL; return ADS_ERROR_SYSTEM(EINVAL); } ret = krb5_auth_con_setaddrs(context, auth_context, &local_kaddr, NULL); if (ret) { close(sock); SAFE_FREE(ap_req.data); krb5_auth_con_free(context, auth_context); DEBUG(1,("krb5_auth_con_setaddrs failed (%s)\n", error_message(ret))); return ADS_ERROR_KRB5(ret); } ret = build_kpasswd_request(pversion, context, auth_context, &ap_req, princ, newpw, use_tcp, &chpw_req); if (ret) { close(sock); SAFE_FREE(ap_req.data); krb5_auth_con_free(context, auth_context); DEBUG(1,("build_setpw_request failed (%s)\n", error_message(ret))); return ADS_ERROR_KRB5(ret); } ret = write(sock, chpw_req.data, chpw_req.length); if (ret != chpw_req.length) { close(sock); SAFE_FREE(chpw_req.data); SAFE_FREE(ap_req.data); krb5_auth_con_free(context, auth_context); DEBUG(1,("send of chpw failed (%s)\n", strerror(errno))); return ADS_ERROR_SYSTEM(errno); } SAFE_FREE(chpw_req.data); chpw_rep.length = 1500; chpw_rep.data = (char *) SMB_MALLOC(chpw_rep.length); if (!chpw_rep.data) { close(sock); SAFE_FREE(ap_req.data); krb5_auth_con_free(context, auth_context); DEBUG(1,("send of chpw failed (%s)\n", strerror(errno))); errno = ENOMEM; return ADS_ERROR_SYSTEM(errno); } ret = read(sock, chpw_rep.data, chpw_rep.length); if (ret < 0) { close(sock); SAFE_FREE(chpw_rep.data); SAFE_FREE(ap_req.data); krb5_auth_con_free(context, auth_context); DEBUG(1,("recv of chpw reply failed (%s)\n", strerror(errno))); return ADS_ERROR_SYSTEM(errno); } close(sock); chpw_rep.length = ret; ret = krb5_auth_con_setaddrs(context, auth_context, NULL,&remote_kaddr); if (ret) { SAFE_FREE(chpw_rep.data); SAFE_FREE(ap_req.data); krb5_auth_con_free(context, auth_context); DEBUG(1,("krb5_auth_con_setaddrs on reply failed (%s)\n", error_message(ret))); return ADS_ERROR_KRB5(ret); } ret = parse_setpw_reply(context, use_tcp, auth_context, &chpw_rep); SAFE_FREE(chpw_rep.data); if (ret) { if (ret == KRB5KRB_ERR_RESPONSE_TOO_BIG && !use_tcp) { DEBUG(5, ("Trying setpw with TCP!!!\n")); use_tcp = True; continue; } SAFE_FREE(ap_req.data); krb5_auth_con_free(context, auth_context); DEBUG(1,("parse_setpw_reply failed (%s)\n", error_message(ret))); return ADS_ERROR_KRB5(ret); } SAFE_FREE(ap_req.data); krb5_auth_con_free(context, auth_context); } while ( ret ); return ADS_SUCCESS; }
ADS_STATUS ads_krb5_set_password(const char *kdc_host, const char *principal, const char *newpw, int time_offset) { ADS_STATUS aret; krb5_error_code ret = 0; krb5_context context = NULL; krb5_principal princ = NULL; krb5_ccache ccache = NULL; int result_code; krb5_data result_code_string = { 0 }; krb5_data result_string = { 0 }; initialize_krb5_error_table(); ret = krb5_init_context(&context); if (ret) { DEBUG(1,("Failed to init krb5 context (%s)\n", error_message(ret))); return ADS_ERROR_KRB5(ret); } if (principal) { ret = smb_krb5_parse_name(context, principal, &princ); if (ret) { krb5_free_context(context); DEBUG(1, ("Failed to parse %s (%s)\n", principal, error_message(ret))); return ADS_ERROR_KRB5(ret); } } if (time_offset != 0) { krb5_set_real_time(context, time(NULL) + time_offset, 0); } ret = krb5_cc_default(context, &ccache); if (ret) { krb5_free_principal(context, princ); krb5_free_context(context); DEBUG(1,("Failed to get default creds (%s)\n", error_message(ret))); return ADS_ERROR_KRB5(ret); } ret = krb5_set_password_using_ccache(context, ccache, discard_const_p(char, newpw), princ, &result_code, &result_code_string, &result_string); if (ret) { DEBUG(1, ("krb5_set_password failed (%s)\n", error_message(ret))); aret = ADS_ERROR_KRB5(ret); goto done; } if (result_code != KRB5_KPASSWD_SUCCESS) { ret = kpasswd_err_to_krb5_err(result_code); DEBUG(1, ("krb5_set_password failed (%s)\n", error_message(ret))); aret = ADS_ERROR_KRB5(ret); goto done; } aret = ADS_SUCCESS; done: kerberos_free_data_contents(context, &result_code_string); kerberos_free_data_contents(context, &result_string); krb5_free_principal(context, princ); krb5_cc_close(context, ccache); krb5_free_context(context); return aret; }
static ADS_STATUS ads_krb5_chg_password(const char *kdc_host, const char *principal, const char *oldpw, const char *newpw, int time_offset) { ADS_STATUS aret; krb5_error_code ret; krb5_context context = NULL; krb5_principal princ; krb5_get_init_creds_opt opts; krb5_creds creds; char *chpw_princ = NULL, *password; char *realm = NULL; int result_code; krb5_data result_code_string = { 0 }; krb5_data result_string = { 0 }; smb_krb5_addresses *addr = NULL; initialize_krb5_error_table(); ret = krb5_init_context(&context); if (ret) { DEBUG(1,("Failed to init krb5 context (%s)\n", error_message(ret))); return ADS_ERROR_KRB5(ret); } if ((ret = smb_krb5_parse_name(context, principal, &princ))) { krb5_free_context(context); DEBUG(1,("Failed to parse %s (%s)\n", principal, error_message(ret))); return ADS_ERROR_KRB5(ret); } krb5_get_init_creds_opt_init(&opts); krb5_get_init_creds_opt_set_tkt_life(&opts, 5*60); krb5_get_init_creds_opt_set_renew_life(&opts, 0); krb5_get_init_creds_opt_set_forwardable(&opts, 0); krb5_get_init_creds_opt_set_proxiable(&opts, 0); /* note that heimdal will fill in the local addresses if the addresses * in the creds_init_opt are all empty and then later fail with invalid * address, sending our local netbios krb5 address - just like windows * - avoids this - gd */ ret = smb_krb5_gen_netbios_krb5_address(&addr, lp_netbios_name()); if (ret) { krb5_free_principal(context, princ); krb5_free_context(context); return ADS_ERROR_KRB5(ret); } krb5_get_init_creds_opt_set_address_list(&opts, addr->addrs); realm = smb_krb5_principal_get_realm(context, princ); /* We have to obtain an INITIAL changepw ticket for changing password */ if (asprintf(&chpw_princ, "kadmin/changepw@%s", realm) == -1) { krb5_free_context(context); free(realm); DEBUG(1,("ads_krb5_chg_password: asprintf fail\n")); return ADS_ERROR_NT(NT_STATUS_NO_MEMORY); } free(realm); password = SMB_STRDUP(oldpw); ret = krb5_get_init_creds_password(context, &creds, princ, password, kerb_prompter, NULL, 0, chpw_princ, &opts); SAFE_FREE(chpw_princ); SAFE_FREE(password); if (ret) { if (ret == KRB5KRB_AP_ERR_BAD_INTEGRITY) DEBUG(1,("Password incorrect while getting initial ticket")); else DEBUG(1,("krb5_get_init_creds_password failed (%s)\n", error_message(ret))); krb5_free_principal(context, princ); krb5_free_context(context); return ADS_ERROR_KRB5(ret); } ret = krb5_change_password(context, &creds, discard_const_p(char, newpw), &result_code, &result_code_string, &result_string); if (ret) { DEBUG(1, ("krb5_change_password failed (%s)\n", error_message(ret))); aret = ADS_ERROR_KRB5(ret); goto done; } if (result_code != KRB5_KPASSWD_SUCCESS) { ret = kpasswd_err_to_krb5_err(result_code); DEBUG(1, ("krb5_change_password failed (%s)\n", error_message(ret))); aret = ADS_ERROR_KRB5(ret); goto done; } aret = ADS_SUCCESS; done: kerberos_free_data_contents(context, &result_code_string); kerberos_free_data_contents(context, &result_string); krb5_free_principal(context, princ); krb5_free_context(context); return aret; }
/* this performs a SASL/gssapi bind we avoid using cyrus-sasl to make Samba more robust. cyrus-sasl is very dependent on correctly configured DNS whereas this routine is much less fragile see RFC2078 and RFC2222 for details */ static ADS_STATUS ads_sasl_gssapi_bind(ADS_STRUCT *ads) { uint32 minor_status; gss_name_t serv_name; gss_buffer_desc input_name; gss_ctx_id_t context_handle = GSS_C_NO_CONTEXT; gss_OID mech_type = GSS_C_NULL_OID; gss_buffer_desc output_token, input_token; uint32 ret_flags, conf_state; struct berval cred; struct berval *scred = NULL; int i=0; int gss_rc, rc; uint8 *p; uint32 max_msg_size = 0; char *sname = NULL; ADS_STATUS status; krb5_principal principal = NULL; krb5_context ctx = NULL; krb5_enctype enc_types[] = { #ifdef ENCTYPE_ARCFOUR_HMAC ENCTYPE_ARCFOUR_HMAC, #endif ENCTYPE_DES_CBC_MD5, ENCTYPE_NULL}; gss_OID_desc nt_principal = {10, CONST_DISCARD(char *, "\052\206\110\206\367\022\001\002\002\002")}; /* we need to fetch a service ticket as the ldap user in the servers realm, regardless of our realm */ asprintf(&sname, "ldap/%s@%s", ads->config.ldap_server_name, ads->config.realm); initialize_krb5_error_table(); status = ADS_ERROR_KRB5(krb5_init_context(&ctx)); if (!ADS_ERR_OK(status)) { SAFE_FREE(sname); return status; } status = ADS_ERROR_KRB5(krb5_set_default_tgs_ktypes(ctx, enc_types)); if (!ADS_ERR_OK(status)) { SAFE_FREE(sname); krb5_free_context(ctx); return status; } status = ADS_ERROR_KRB5(smb_krb5_parse_name(ctx, sname, &principal)); if (!ADS_ERR_OK(status)) { SAFE_FREE(sname); krb5_free_context(ctx); return status; } input_name.value = &principal; input_name.length = sizeof(principal); gss_rc = gss_import_name(&minor_status, &input_name, &nt_principal, &serv_name); /* * The MIT libraries have a *HORRIBLE* bug - input_value.value needs * to point to the *address* of the krb5_principal, and the gss libraries * to a shallow copy of the krb5_principal pointer - so we need to keep * the krb5_principal around until we do the gss_release_name. MIT *SUCKS* ! * Just one more way in which MIT engineers screwed me over.... JRA. */ SAFE_FREE(sname); if (gss_rc) { krb5_free_principal(ctx, principal); krb5_free_context(ctx); return ADS_ERROR_GSS(gss_rc, minor_status); } input_token.value = NULL; input_token.length = 0; for (i=0; i < MAX_GSS_PASSES; i++) { gss_rc = gss_init_sec_context(&minor_status, GSS_C_NO_CREDENTIAL, &context_handle, serv_name, mech_type, GSS_C_MUTUAL_FLAG | GSS_C_REPLAY_FLAG, 0, NULL, &input_token, NULL, &output_token, &ret_flags, NULL); if (input_token.value) { gss_release_buffer(&minor_status, &input_token); } if (gss_rc && gss_rc != GSS_S_CONTINUE_NEEDED) { status = ADS_ERROR_GSS(gss_rc, minor_status); goto failed; } cred.bv_val = (char *)output_token.value; cred.bv_len = output_token.length; rc = ldap_sasl_bind_s(ads->ld, NULL, "GSSAPI", &cred, NULL, NULL, &scred); if (rc != LDAP_SASL_BIND_IN_PROGRESS) { status = ADS_ERROR(rc); goto failed; } if (output_token.value) { gss_release_buffer(&minor_status, &output_token); } if (scred) { input_token.value = scred->bv_val; input_token.length = scred->bv_len; } else { input_token.value = NULL; input_token.length = 0; } if (gss_rc == 0) break; } gss_rc = gss_unwrap(&minor_status,context_handle,&input_token,&output_token, (int *)&conf_state,NULL); if (gss_rc) { status = ADS_ERROR_GSS(gss_rc, minor_status); goto failed; } gss_release_buffer(&minor_status, &input_token); p = (uint8 *)output_token.value; #if 0 file_save("sasl_gssapi.dat", output_token.value, output_token.length); #endif if (p) { max_msg_size = (p[1]<<16) | (p[2]<<8) | p[3]; } gss_release_buffer(&minor_status, &output_token); output_token.value = SMB_MALLOC(strlen(ads->config.bind_path) + 8); p = (uint8 *)output_token.value; *p++ = 1; /* no sign & seal selection */ /* choose the same size as the server gave us */ *p++ = max_msg_size>>16; *p++ = max_msg_size>>8; *p++ = max_msg_size; snprintf((char *)p, strlen(ads->config.bind_path)+4, "dn:%s", ads->config.bind_path); p += strlen((const char *)p); output_token.length = PTR_DIFF(p, output_token.value); gss_rc = gss_wrap(&minor_status, context_handle,0,GSS_C_QOP_DEFAULT, &output_token, (int *)&conf_state, &input_token); if (gss_rc) { status = ADS_ERROR_GSS(gss_rc, minor_status); goto failed; } free(output_token.value); cred.bv_val = (char *)input_token.value; cred.bv_len = input_token.length; rc = ldap_sasl_bind_s(ads->ld, NULL, "GSSAPI", &cred, NULL, NULL, &scred); status = ADS_ERROR(rc); gss_release_buffer(&minor_status, &input_token); failed: gss_release_name(&minor_status, &serv_name); if (context_handle != GSS_C_NO_CONTEXT) gss_delete_sec_context(&minor_status, &context_handle, GSS_C_NO_BUFFER); krb5_free_principal(ctx, principal); krb5_free_context(ctx); if(scred) ber_bvfree(scred); return status; }
ADS_STATUS ads_krb5_set_password(const char *kdc_host, const char *princ, const char *newpw, int time_offset) { ADS_STATUS aret; krb5_error_code ret = 0; krb5_context context = NULL; krb5_principal principal = NULL; char *princ_name = NULL; char *realm = NULL; krb5_creds creds, *credsp = NULL; #if KRB5_PRINC_REALM_RETURNS_REALM krb5_realm orig_realm; #else krb5_data orig_realm; #endif krb5_ccache ccache = NULL; ZERO_STRUCT(creds); initialize_krb5_error_table(); ret = krb5_init_context(&context); if (ret) { DEBUG(1,("Failed to init krb5 context (%s)\n", error_message(ret))); return ADS_ERROR_KRB5(ret); } if (time_offset != 0) { krb5_set_real_time(context, time(NULL) + time_offset, 0); } ret = krb5_cc_default(context, &ccache); if (ret) { krb5_free_context(context); DEBUG(1,("Failed to get default creds (%s)\n", error_message(ret))); return ADS_ERROR_KRB5(ret); } realm = strchr_m(princ, '@'); if (!realm) { krb5_cc_close(context, ccache); krb5_free_context(context); DEBUG(1,("Failed to get realm\n")); return ADS_ERROR_KRB5(-1); } realm++; asprintf(&princ_name, "kadmin/changepw@%s", realm); ret = smb_krb5_parse_name(context, princ_name, &creds.server); if (ret) { krb5_cc_close(context, ccache); krb5_free_context(context); DEBUG(1,("Failed to parse kadmin/changepw (%s)\n", error_message(ret))); return ADS_ERROR_KRB5(ret); } /* parse the principal we got as a function argument */ ret = smb_krb5_parse_name(context, princ, &principal); if (ret) { krb5_cc_close(context, ccache); krb5_free_principal(context, creds.server); krb5_free_context(context); DEBUG(1,("Failed to parse %s (%s)\n", princ_name, error_message(ret))); free(princ_name); return ADS_ERROR_KRB5(ret); } free(princ_name); /* The creds.server principal takes ownership of this memory. Remember to set back to original value before freeing. */ orig_realm = *krb5_princ_realm(context, creds.server); krb5_princ_set_realm(context, creds.server, krb5_princ_realm(context, principal)); ret = krb5_cc_get_principal(context, ccache, &creds.client); if (ret) { krb5_cc_close(context, ccache); krb5_princ_set_realm(context, creds.server, &orig_realm); krb5_free_principal(context, creds.server); krb5_free_principal(context, principal); krb5_free_context(context); DEBUG(1,("Failed to get principal from ccache (%s)\n", error_message(ret))); return ADS_ERROR_KRB5(ret); } ret = krb5_get_credentials(context, 0, ccache, &creds, &credsp); if (ret) { krb5_cc_close(context, ccache); krb5_free_principal(context, creds.client); krb5_princ_set_realm(context, creds.server, &orig_realm); krb5_free_principal(context, creds.server); krb5_free_principal(context, principal); krb5_free_context(context); DEBUG(1,("krb5_get_credentials failed (%s)\n", error_message(ret))); return ADS_ERROR_KRB5(ret); } /* we might have to call krb5_free_creds(...) from now on ... */ aret = do_krb5_kpasswd_request(context, kdc_host, KRB5_KPASSWD_VERS_SETPW, credsp, princ, newpw); krb5_free_creds(context, credsp); krb5_free_principal(context, creds.client); krb5_princ_set_realm(context, creds.server, &orig_realm); krb5_free_principal(context, creds.server); krb5_free_principal(context, principal); krb5_cc_close(context, ccache); krb5_free_context(context); return aret; }