static NTSTATUS auth3_generate_session_info_pac(struct auth4_context *auth_ctx,
TALLOC_CTX *mem_ctx,
struct smb_krb5_context *smb_krb5_context,
DATA_BLOB *pac_blob,
const char *princ_name,
const struct tsocket_address *remote_address,
uint32_t session_info_flags,
struct auth_session_info **session_info)
{
TALLOC_CTX *tmp_ctx;
struct PAC_LOGON_INFO *logon_info = NULL;
struct netr_SamInfo3 *info3_copy = NULL;
bool is_mapped;
bool is_guest;
char *ntuser;
char *ntdomain;
char *username;
char *rhost;
struct passwd *pw;
NTSTATUS status;
int rc;
tmp_ctx = talloc_new(mem_ctx);
if (!tmp_ctx) {
return NT_STATUS_NO_MEMORY;
}
if (pac_blob) {
#ifdef HAVE_KRB5
status = kerberos_pac_logon_info(tmp_ctx, *pac_blob, NULL, NULL,
NULL, NULL, 0, &logon_info);
#else
status = NT_STATUS_ACCESS_DENIED;
#endif
if (!NT_STATUS_IS_OK(status)) {
goto done;
}
}
rc = get_remote_hostname(remote_address,
&rhost,
tmp_ctx);
if (rc < 0) {
status = NT_STATUS_NO_MEMORY;
goto done;
}
if (strequal(rhost, "UNKNOWN")) {
rhost = tsocket_address_inet_addr_string(remote_address,
tmp_ctx);
if (rhost == NULL) {
status = NT_STATUS_NO_MEMORY;
goto done;
}
}
status = get_user_from_kerberos_info(tmp_ctx, rhost,
princ_name, logon_info,
&is_mapped, &is_guest,
&ntuser, &ntdomain,
&username, &pw);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(1, ("Failed to map kerberos principal to system user "
"(%s)\n", nt_errstr(status)));
status = NT_STATUS_ACCESS_DENIED;
goto done;
}
/* save the PAC data if we have it */
if (logon_info) {
status = create_info3_from_pac_logon_info(tmp_ctx,
logon_info,
&info3_copy);
if (!NT_STATUS_IS_OK(status)) {
goto done;
}
netsamlogon_cache_store(ntuser, info3_copy);
}
/* setup the string used by %U */
sub_set_smb_name(username);
/* reload services so that the new %U is taken into account */
lp_load_with_shares(get_dyn_CONFIGFILE());
status = make_session_info_krb5(mem_ctx,
ntuser, ntdomain, username, pw,
info3_copy, is_guest, is_mapped, NULL /* No session key for now, caller will sort it out */,
session_info);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(1, ("Failed to map kerberos pac to server info (%s)\n",
nt_errstr(status)));
status = NT_STATUS_ACCESS_DENIED;
goto done;
}
DEBUG(5, (__location__ "OK: user: %s domain: %s client: %s\n",
ntuser, ntdomain, rhost));
status = NT_STATUS_OK;
done:
TALLOC_FREE(tmp_ctx);
return status;
}
/* Check with a known 'well formed' PAC, from my test server */
static bool torture_pac_saved_check(struct torture_context *tctx)
{
NTSTATUS nt_status;
enum ndr_err_code ndr_err;
DATA_BLOB tmp_blob, validate_blob;
struct PAC_DATA *pac_data, pac_data2;
struct PAC_LOGON_INFO *logon_info;
union netr_Validation validation;
const char *pac_file, *pac_kdc_key, *pac_member_key;
struct auth_serversupplied_info *server_info_out;
krb5_keyblock server_keyblock;
krb5_keyblock krbtgt_keyblock, *krbtgt_keyblock_p;
struct samr_Password *krbtgt_bytes, *krbsrv_bytes;
krb5_error_code ret;
struct smb_krb5_context *smb_krb5_context;
const char *principal_string;
char *broken_principal_string;
krb5_principal client_principal;
const char *authtime_string;
time_t authtime;
TALLOC_CTX *mem_ctx = tctx;
torture_assert(tctx, 0 == smb_krb5_init_context(mem_ctx, NULL,
tctx->lp_ctx,
&smb_krb5_context),
"smb_krb5_init_context");
pac_kdc_key = torture_setting_string(tctx, "pac_kdc_key",
"B286757148AF7FD252C53603A150B7E7");
pac_member_key = torture_setting_string(tctx, "pac_member_key",
"D217FAEAE5E6B5F95CCC94077AB8A5FC");
torture_comment(tctx, "Using pac_kdc_key '%s'\n", pac_kdc_key);
torture_comment(tctx, "Using pac_member_key '%s'\n", pac_member_key);
/* The krbtgt key in use when the above PAC was generated.
* This is an arcfour-hmac-md5 key, extracted with our 'net
* samdump' tool. */
if (*pac_kdc_key == 0) {
krbtgt_bytes = NULL;
} else {
krbtgt_bytes = smbpasswd_gethexpwd(mem_ctx, pac_kdc_key);
if (!krbtgt_bytes) {
torture_fail(tctx, "(saved test) Could not interpret krbtgt key");
}
}
krbsrv_bytes = smbpasswd_gethexpwd(mem_ctx, pac_member_key);
if (!krbsrv_bytes) {
torture_fail(tctx, "(saved test) Could not interpret krbsrv key");
}
ret = krb5_keyblock_init(smb_krb5_context->krb5_context,
ENCTYPE_ARCFOUR_HMAC,
krbsrv_bytes->hash, sizeof(krbsrv_bytes->hash),
&server_keyblock);
torture_assert(tctx, !ret,
talloc_asprintf(tctx,
"(saved test) Server Keyblock encoding failed: %s",
smb_get_krb5_error_message(smb_krb5_context->krb5_context,
ret, mem_ctx)));
if (krbtgt_bytes) {
ret = krb5_keyblock_init(smb_krb5_context->krb5_context,
ENCTYPE_ARCFOUR_HMAC,
krbtgt_bytes->hash, sizeof(krbtgt_bytes->hash),
&krbtgt_keyblock);
if (ret) {
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
&server_keyblock);
torture_fail(tctx,
talloc_asprintf(tctx,
"(saved test) Server Keyblock encoding failed: %s",
smb_get_krb5_error_message(smb_krb5_context->krb5_context,
ret, mem_ctx)));
}
krbtgt_keyblock_p = &krbtgt_keyblock;
} else {
krbtgt_keyblock_p = NULL;
}
pac_file = torture_setting_string(tctx, "pac_file", NULL);
if (pac_file) {
tmp_blob.data = (uint8_t *)file_load(pac_file, &tmp_blob.length, 0, mem_ctx);
torture_comment(tctx, "(saved test) Loaded pac of size %ld from %s\n", (long)tmp_blob.length, pac_file);
} else {
tmp_blob = data_blob_talloc(mem_ctx, saved_pac, sizeof(saved_pac));
}
dump_data(10,tmp_blob.data,tmp_blob.length);
principal_string = torture_setting_string(tctx, "pac_client_principal",
"[email protected]");
authtime_string = torture_setting_string(tctx, "pac_authtime", "1120440609");
authtime = strtoull(authtime_string, NULL, 0);
ret = krb5_parse_name(smb_krb5_context->krb5_context, principal_string,
&client_principal);
if (ret) {
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
krbtgt_keyblock_p);
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
&server_keyblock);
torture_fail(tctx,
talloc_asprintf(tctx,
"(saved test) parsing of client principal [%s] failed: %s",
principal_string,
smb_get_krb5_error_message(smb_krb5_context->krb5_context, ret, mem_ctx)));
}
/* Decode and verify the signaure on the PAC */
nt_status = kerberos_decode_pac(mem_ctx,
lp_iconv_convenience(tctx->lp_ctx),
&pac_data,
tmp_blob,
smb_krb5_context->krb5_context,
krbtgt_keyblock_p,
&server_keyblock,
client_principal, authtime, NULL);
if (!NT_STATUS_IS_OK(nt_status)) {
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
krbtgt_keyblock_p);
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
&server_keyblock);
krb5_free_principal(smb_krb5_context->krb5_context, client_principal);
torture_fail(tctx, talloc_asprintf(tctx,
"(saved test) PAC decoding failed: %s",
nt_errstr(nt_status)));
}
/* Now check we can read it back (using Heimdal's pac parsing) */
nt_status = kerberos_pac_blob_to_server_info(mem_ctx,
lp_iconv_convenience(tctx->lp_ctx),
tmp_blob,
smb_krb5_context->krb5_context,
&server_info_out);
if (!NT_STATUS_IS_OK(nt_status)) {
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
krbtgt_keyblock_p);
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
&server_keyblock);
krb5_free_principal(smb_krb5_context->krb5_context, client_principal);
torture_fail(tctx, talloc_asprintf(tctx,
"(saved test) Heimdal PAC decoding failed: %s",
nt_errstr(nt_status)));
}
if (!pac_file &&
!dom_sid_equal(dom_sid_parse_talloc(mem_ctx,
"S-1-5-21-3048156945-3961193616-3706469200-1005"),
server_info_out->account_sid)) {
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
krbtgt_keyblock_p);
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
&server_keyblock);
krb5_free_principal(smb_krb5_context->krb5_context, client_principal);
torture_fail(tctx,
talloc_asprintf(tctx,
"(saved test) Heimdal PAC Decode resulted in *different* domain SID: %s != %s",
"S-1-5-21-3048156945-3961193616-3706469200-1005",
dom_sid_string(mem_ctx, server_info_out->account_sid)));
}
talloc_free(server_info_out);
/* Parse the PAC again, for the logon info this time (using Samba4's parsing) */
nt_status = kerberos_pac_logon_info(mem_ctx,
lp_iconv_convenience(tctx->lp_ctx),
&logon_info,
tmp_blob,
smb_krb5_context->krb5_context,
krbtgt_keyblock_p,
&server_keyblock,
client_principal, authtime, NULL);
if (!NT_STATUS_IS_OK(nt_status)) {
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
krbtgt_keyblock_p);
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
&server_keyblock);
krb5_free_principal(smb_krb5_context->krb5_context, client_principal);
torture_fail(tctx,
talloc_asprintf(tctx,
"(saved test) PAC decoding (for logon info) failed: %s",
nt_errstr(nt_status)));
}
validation.sam3 = &logon_info->info3;
nt_status = make_server_info_netlogon_validation(mem_ctx,
"",
3, &validation,
&server_info_out);
if (!NT_STATUS_IS_OK(nt_status)) {
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
krbtgt_keyblock_p);
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
&server_keyblock);
krb5_free_principal(smb_krb5_context->krb5_context, client_principal);
torture_fail(tctx,
talloc_asprintf(tctx,
"(saved test) PAC decoding (make server info) failed: %s",
nt_errstr(nt_status)));
}
if (!pac_file &&
!dom_sid_equal(dom_sid_parse_talloc(mem_ctx,
"S-1-5-21-3048156945-3961193616-3706469200-1005"),
server_info_out->account_sid)) {
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
krbtgt_keyblock_p);
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
&server_keyblock);
krb5_free_principal(smb_krb5_context->krb5_context, client_principal);
torture_fail(tctx,
talloc_asprintf(tctx,
"(saved test) PAC Decode resulted in *different* domain SID: %s != %s",
"S-1-5-21-3048156945-3961193616-3706469200-1005",
dom_sid_string(mem_ctx, server_info_out->account_sid)));
}
if (krbtgt_bytes == NULL) {
torture_comment(tctx, "skipping PAC encoding tests as non kdc key\n");
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
&server_keyblock);
krb5_free_principal(smb_krb5_context->krb5_context, client_principal);
return true;
}
ret = kerberos_encode_pac(mem_ctx,
lp_iconv_convenience(tctx->lp_ctx),
pac_data,
smb_krb5_context->krb5_context,
krbtgt_keyblock_p,
&server_keyblock,
&validate_blob);
if (ret != 0) {
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
krbtgt_keyblock_p);
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
&server_keyblock);
krb5_free_principal(smb_krb5_context->krb5_context, client_principal);
torture_fail(tctx, "(saved test) PAC push failed");
}
dump_data(10, validate_blob.data, validate_blob.length);
/* compare both the length and the data bytes after a
* pull/push cycle. This ensures we use the exact same
* pointer, padding etc algorithms as win2k3.
*/
if (tmp_blob.length != validate_blob.length) {
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
krbtgt_keyblock_p);
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
&server_keyblock);
krb5_free_principal(smb_krb5_context->krb5_context, client_principal);
torture_fail(tctx,
talloc_asprintf(tctx,
"(saved test) PAC push failed: original buffer length[%u] != created buffer length[%u]",
(unsigned)tmp_blob.length, (unsigned)validate_blob.length));
}
if (memcmp(tmp_blob.data, validate_blob.data, tmp_blob.length) != 0) {
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
krbtgt_keyblock_p);
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
&server_keyblock);
krb5_free_principal(smb_krb5_context->krb5_context, client_principal);
DEBUG(0, ("tmp_data:\n"));
dump_data(0, tmp_blob.data, tmp_blob.length);
DEBUG(0, ("validate_blob:\n"));
dump_data(0, validate_blob.data, validate_blob.length);
torture_fail(tctx, talloc_asprintf(tctx, "(saved test) PAC push failed: length[%u] matches, but data does not", (unsigned)tmp_blob.length));
}
ret = kerberos_create_pac(mem_ctx,
lp_iconv_convenience(tctx->lp_ctx),
server_info_out,
smb_krb5_context->krb5_context,
krbtgt_keyblock_p,
&server_keyblock,
client_principal, authtime,
&validate_blob);
if (ret != 0) {
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
krbtgt_keyblock_p);
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
&server_keyblock);
krb5_free_principal(smb_krb5_context->krb5_context, client_principal);
torture_fail(tctx, "(saved test) regnerated PAC create failed");
}
dump_data(10,validate_blob.data,validate_blob.length);
/* compare both the length and the data bytes after a
* pull/push cycle. This ensures we use the exact same
* pointer, padding etc algorithms as win2k3.
*/
if (tmp_blob.length != validate_blob.length) {
ndr_err = ndr_pull_struct_blob(&validate_blob, mem_ctx,
lp_iconv_convenience(tctx->lp_ctx), &pac_data2,
(ndr_pull_flags_fn_t)ndr_pull_PAC_DATA);
nt_status = ndr_map_error2ntstatus(ndr_err);
torture_assert_ntstatus_ok(tctx, nt_status, "can't parse the PAC");
NDR_PRINT_DEBUG(PAC_DATA, pac_data);
NDR_PRINT_DEBUG(PAC_DATA, &pac_data2);
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
krbtgt_keyblock_p);
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
&server_keyblock);
krb5_free_principal(smb_krb5_context->krb5_context, client_principal);
torture_fail(tctx, talloc_asprintf(tctx,
"(saved test) PAC regenerate failed: original buffer length[%u] != created buffer length[%u]",
(unsigned)tmp_blob.length, (unsigned)validate_blob.length));
}
if (memcmp(tmp_blob.data, validate_blob.data, tmp_blob.length) != 0) {
ndr_err = ndr_pull_struct_blob(&validate_blob, mem_ctx,
lp_iconv_convenience(tctx->lp_ctx), &pac_data2,
(ndr_pull_flags_fn_t)ndr_pull_PAC_DATA);
nt_status = ndr_map_error2ntstatus(ndr_err);
torture_assert_ntstatus_ok(tctx, nt_status, "can't parse the PAC");
NDR_PRINT_DEBUG(PAC_DATA, pac_data);
NDR_PRINT_DEBUG(PAC_DATA, &pac_data2);
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
krbtgt_keyblock_p);
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
&server_keyblock);
krb5_free_principal(smb_krb5_context->krb5_context, client_principal);
DEBUG(0, ("tmp_data:\n"));
dump_data(0, tmp_blob.data, tmp_blob.length);
DEBUG(0, ("validate_blob:\n"));
dump_data(0, validate_blob.data, validate_blob.length);
torture_fail(tctx, talloc_asprintf(tctx,
"(saved test) PAC regenerate failed: length[%u] matches, but data does not", (unsigned)tmp_blob.length));
}
/* Break the auth time, to ensure we check this vital detail (not setting this caused all the pain in the first place... */
nt_status = kerberos_decode_pac(mem_ctx,
lp_iconv_convenience(tctx->lp_ctx),
&pac_data,
tmp_blob,
smb_krb5_context->krb5_context,
krbtgt_keyblock_p,
&server_keyblock,
client_principal,
authtime + 1, NULL);
if (NT_STATUS_IS_OK(nt_status)) {
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
krbtgt_keyblock_p);
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
&server_keyblock);
krb5_free_principal(smb_krb5_context->krb5_context, client_principal);
torture_fail(tctx, "(saved test) PAC decoding DID NOT fail on broken auth time (time + 1)");
}
/* Break the client principal */
krb5_free_principal(smb_krb5_context->krb5_context, client_principal);
broken_principal_string = talloc_strdup(mem_ctx, principal_string);
broken_principal_string[0]++;
ret = krb5_parse_name(smb_krb5_context->krb5_context,
broken_principal_string, &client_principal);
if (ret) {
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
krbtgt_keyblock_p);
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
&server_keyblock);
torture_fail(tctx, talloc_asprintf(tctx,
"(saved test) parsing of broken client principal failed: %s",
smb_get_krb5_error_message(smb_krb5_context->krb5_context, ret, mem_ctx)));
}
nt_status = kerberos_decode_pac(mem_ctx,
lp_iconv_convenience(tctx->lp_ctx),
&pac_data,
tmp_blob,
smb_krb5_context->krb5_context,
krbtgt_keyblock_p,
&server_keyblock,
client_principal,
authtime, NULL);
if (NT_STATUS_IS_OK(nt_status)) {
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
krbtgt_keyblock_p);
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
&server_keyblock);
torture_fail(tctx, "(saved test) PAC decoding DID NOT fail on modified principal");
}
/* Finally... Bugger up the signature, and check we fail the checksum */
tmp_blob.data[tmp_blob.length - 2]++;
nt_status = kerberos_decode_pac(mem_ctx,
lp_iconv_convenience(tctx->lp_ctx),
&pac_data,
tmp_blob,
smb_krb5_context->krb5_context,
krbtgt_keyblock_p,
&server_keyblock,
client_principal,
authtime, NULL);
if (NT_STATUS_IS_OK(nt_status)) {
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
krbtgt_keyblock_p);
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
&server_keyblock);
torture_fail(tctx, "(saved test) PAC decoding DID NOT fail on broken checksum");
}
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
krbtgt_keyblock_p);
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
&server_keyblock);
return true;
}
static bool torture_pac_self_check(struct torture_context *tctx)
{
NTSTATUS nt_status;
DATA_BLOB tmp_blob;
struct PAC_DATA *pac_data;
struct PAC_LOGON_INFO *logon_info;
union netr_Validation validation;
/* Generate a nice, arbitary keyblock */
uint8_t server_bytes[16];
uint8_t krbtgt_bytes[16];
krb5_keyblock server_keyblock;
krb5_keyblock krbtgt_keyblock;
krb5_error_code ret;
struct smb_krb5_context *smb_krb5_context;
struct auth_serversupplied_info *server_info;
struct auth_serversupplied_info *server_info_out;
krb5_principal client_principal;
time_t logon_time = time(NULL);
TALLOC_CTX *mem_ctx = tctx;
torture_assert(tctx, 0 == smb_krb5_init_context(mem_ctx,
NULL,
tctx->lp_ctx,
&smb_krb5_context),
"smb_krb5_init_context");
generate_random_buffer(server_bytes, 16);
generate_random_buffer(krbtgt_bytes, 16);
ret = krb5_keyblock_init(smb_krb5_context->krb5_context,
ENCTYPE_ARCFOUR_HMAC,
server_bytes, sizeof(server_bytes),
&server_keyblock);
torture_assert(tctx, !ret, talloc_asprintf(tctx,
"(self test) Server Keyblock encoding failed: %s",
smb_get_krb5_error_message(smb_krb5_context->krb5_context,
ret, mem_ctx)));
ret = krb5_keyblock_init(smb_krb5_context->krb5_context,
ENCTYPE_ARCFOUR_HMAC,
krbtgt_bytes, sizeof(krbtgt_bytes),
&krbtgt_keyblock);
if (ret) {
char *err = smb_get_krb5_error_message(smb_krb5_context->krb5_context,
ret, mem_ctx);
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
&server_keyblock);
torture_fail(tctx, talloc_asprintf(tctx,
"(self test) KRBTGT Keyblock encoding failed: %s", err));
}
/* We need an input, and this one requires no underlying database */
nt_status = auth_anonymous_server_info(mem_ctx, lp_netbios_name(tctx->lp_ctx), &server_info);
if (!NT_STATUS_IS_OK(nt_status)) {
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
&server_keyblock);
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
&krbtgt_keyblock);
torture_fail(tctx, "auth_anonymous_server_info");
}
ret = krb5_parse_name_flags(smb_krb5_context->krb5_context,
server_info->account_name,
KRB5_PRINCIPAL_PARSE_NO_REALM,
&client_principal);
if (ret) {
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
&server_keyblock);
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
&krbtgt_keyblock);
torture_fail(tctx, "krb5_parse_name_flags(norealm)");
}
/* OK, go ahead and make a PAC */
ret = kerberos_create_pac(mem_ctx,
lp_iconv_convenience(tctx->lp_ctx),
server_info,
smb_krb5_context->krb5_context,
&krbtgt_keyblock,
&server_keyblock,
client_principal,
logon_time,
&tmp_blob);
if (ret) {
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
&krbtgt_keyblock);
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
&server_keyblock);
krb5_free_principal(smb_krb5_context->krb5_context,
client_principal);
torture_fail(tctx, talloc_asprintf(tctx,
"(self test) PAC encoding failed: %s",
smb_get_krb5_error_message(smb_krb5_context->krb5_context,
ret, mem_ctx)));
}
dump_data(10,tmp_blob.data,tmp_blob.length);
/* Now check that we can read it back (using full decode and validate) */
nt_status = kerberos_decode_pac(mem_ctx,
lp_iconv_convenience(tctx->lp_ctx),
&pac_data,
tmp_blob,
smb_krb5_context->krb5_context,
&krbtgt_keyblock,
&server_keyblock,
client_principal,
logon_time, NULL);
if (!NT_STATUS_IS_OK(nt_status)) {
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
&krbtgt_keyblock);
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
&server_keyblock);
krb5_free_principal(smb_krb5_context->krb5_context,
client_principal);
torture_fail(tctx, talloc_asprintf(tctx,
"(self test) PAC decoding failed: %s",
nt_errstr(nt_status)));
}
/* Now check we can read it back (using Heimdal's pac parsing) */
nt_status = kerberos_pac_blob_to_server_info(mem_ctx,
lp_iconv_convenience(tctx->lp_ctx),
tmp_blob,
smb_krb5_context->krb5_context,
&server_info_out);
if (!dom_sid_equal(server_info->account_sid,
server_info_out->account_sid)) {
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
&krbtgt_keyblock);
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
&server_keyblock);
krb5_free_principal(smb_krb5_context->krb5_context,
client_principal);
torture_fail(tctx,
talloc_asprintf(tctx,
"(self test) PAC Decode resulted in *different* domain SID: %s != %s",
dom_sid_string(mem_ctx, server_info->account_sid),
dom_sid_string(mem_ctx, server_info_out->account_sid)));
}
talloc_free(server_info_out);
/* Now check that we can read it back (yet again) */
nt_status = kerberos_pac_logon_info(mem_ctx,
lp_iconv_convenience(tctx->lp_ctx),
&logon_info,
tmp_blob,
smb_krb5_context->krb5_context,
&krbtgt_keyblock,
&server_keyblock,
client_principal,
logon_time,
NULL);
if (!NT_STATUS_IS_OK(nt_status)) {
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
&krbtgt_keyblock);
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
&server_keyblock);
krb5_free_principal(smb_krb5_context->krb5_context,
client_principal);
torture_fail(tctx,
talloc_asprintf(tctx,
"(self test) PAC decoding (for logon info) failed: %s",
nt_errstr(nt_status)));
}
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
&krbtgt_keyblock);
krb5_free_keyblock_contents(smb_krb5_context->krb5_context,
&server_keyblock);
krb5_free_principal(smb_krb5_context->krb5_context,
client_principal);
/* And make a server info from the samba-parsed PAC */
validation.sam3 = &logon_info->info3;
nt_status = make_server_info_netlogon_validation(mem_ctx,
"",
3, &validation,
&server_info_out);
if (!NT_STATUS_IS_OK(nt_status)) {
torture_fail(tctx,
talloc_asprintf(tctx,
"(self test) PAC decoding (make server info) failed: %s",
nt_errstr(nt_status)));
}
if (!dom_sid_equal(server_info->account_sid,
server_info_out->account_sid)) {
torture_fail(tctx,
talloc_asprintf(tctx,
"(self test) PAC Decode resulted in *different* domain SID: %s != %s",
dom_sid_string(mem_ctx, server_info->account_sid),
dom_sid_string(mem_ctx, server_info_out->account_sid)));
}
return true;
}
static NTSTATUS gensec_krb5_session_info(struct gensec_security *gensec_security,
TALLOC_CTX *mem_ctx_out,
struct auth_session_info **_session_info)
{
NTSTATUS nt_status = NT_STATUS_UNSUCCESSFUL;
struct gensec_krb5_state *gensec_krb5_state = (struct gensec_krb5_state *)gensec_security->private_data;
krb5_context context = gensec_krb5_state->smb_krb5_context->krb5_context;
struct auth_user_info_dc *user_info_dc = NULL;
struct auth_session_info *session_info = NULL;
struct PAC_LOGON_INFO *logon_info;
krb5_principal client_principal;
char *principal_string;
DATA_BLOB pac;
krb5_data pac_data;
krb5_error_code ret;
TALLOC_CTX *mem_ctx = talloc_new(mem_ctx_out);
if (!mem_ctx) {
return NT_STATUS_NO_MEMORY;
}
ret = krb5_ticket_get_client(context, gensec_krb5_state->ticket, &client_principal);
if (ret) {
DEBUG(5, ("krb5_ticket_get_client failed to get cleint principal: %s\n",
smb_get_krb5_error_message(context,
ret, mem_ctx)));
talloc_free(mem_ctx);
return NT_STATUS_NO_MEMORY;
}
ret = krb5_unparse_name(gensec_krb5_state->smb_krb5_context->krb5_context,
client_principal, &principal_string);
if (ret) {
DEBUG(1, ("Unable to parse client principal: %s\n",
smb_get_krb5_error_message(context,
ret, mem_ctx)));
krb5_free_principal(context, client_principal);
talloc_free(mem_ctx);
return NT_STATUS_NO_MEMORY;
}
ret = krb5_ticket_get_authorization_data_type(context, gensec_krb5_state->ticket,
KRB5_AUTHDATA_WIN2K_PAC,
&pac_data);
if (ret && gensec_setting_bool(gensec_security->settings, "gensec", "require_pac", false)) {
DEBUG(1, ("Unable to find PAC in ticket from %s, failing to allow access: %s \n",
principal_string,
smb_get_krb5_error_message(context,
ret, mem_ctx)));
free(principal_string);
krb5_free_principal(context, client_principal);
talloc_free(mem_ctx);
return NT_STATUS_ACCESS_DENIED;
} else if (ret) {
/* NO pac */
DEBUG(5, ("krb5_ticket_get_authorization_data_type failed to find PAC: %s\n",
smb_get_krb5_error_message(context,
ret, mem_ctx)));
if (gensec_security->auth_context &&
!gensec_setting_bool(gensec_security->settings, "gensec", "require_pac", false)) {
DEBUG(1, ("Unable to find PAC for %s, resorting to local user lookup: %s",
principal_string, smb_get_krb5_error_message(context,
ret, mem_ctx)));
nt_status = gensec_security->auth_context->get_user_info_dc_principal(mem_ctx,
gensec_security->auth_context,
principal_string,
NULL, &user_info_dc);
if (!NT_STATUS_IS_OK(nt_status)) {
free(principal_string);
krb5_free_principal(context, client_principal);
talloc_free(mem_ctx);
return nt_status;
}
} else {
DEBUG(1, ("Unable to find PAC in ticket from %s, failing to allow access\n",
principal_string));
free(principal_string);
krb5_free_principal(context, client_principal);
talloc_free(mem_ctx);
return NT_STATUS_ACCESS_DENIED;
}
} else {
/* Found pac */
union netr_Validation validation;
pac = data_blob_talloc(mem_ctx, pac_data.data, pac_data.length);
if (!pac.data) {
free(principal_string);
krb5_free_principal(context, client_principal);
talloc_free(mem_ctx);
return NT_STATUS_NO_MEMORY;
}
/* decode and verify the pac */
nt_status = kerberos_pac_logon_info(gensec_krb5_state,
pac,
gensec_krb5_state->smb_krb5_context->krb5_context,
NULL, gensec_krb5_state->keyblock,
client_principal,
gensec_krb5_state->ticket->ticket.authtime, &logon_info);
if (!NT_STATUS_IS_OK(nt_status)) {
free(principal_string);
krb5_free_principal(context, client_principal);
talloc_free(mem_ctx);
return nt_status;
}
validation.sam3 = &logon_info->info3;
nt_status = make_user_info_dc_netlogon_validation(mem_ctx,
NULL,
3, &validation,
true, /* This user was authenticated */
&user_info_dc);
if (!NT_STATUS_IS_OK(nt_status)) {
free(principal_string);
krb5_free_principal(context, client_principal);
talloc_free(mem_ctx);
return nt_status;
}
}
free(principal_string);
krb5_free_principal(context, client_principal);
/* references the user_info_dc into the session_info */
nt_status = gensec_generate_session_info(mem_ctx, gensec_security, user_info_dc, &session_info);
if (!NT_STATUS_IS_OK(nt_status)) {
talloc_free(mem_ctx);
return nt_status;
}
nt_status = gensec_krb5_session_key(gensec_security, session_info, &session_info->session_key);
if (!NT_STATUS_IS_OK(nt_status)) {
talloc_free(mem_ctx);
return nt_status;
}
*_session_info = talloc_steal(mem_ctx_out, session_info);
talloc_free(mem_ctx);
return NT_STATUS_OK;
}
