*/
#include "includes.h"
+#include <tevent.h>
+#include "lib/util/tevent_ntstatus.h"
#include "system/kerberos.h"
#include "auth/kerberos/kerberos.h"
#include "auth/auth.h"
-#include "lib/socket/socket.h"
#include "lib/tsocket/tsocket.h"
-#include "librpc/rpc/dcerpc.h"
+#include "librpc/gen_ndr/dcerpc.h"
#include "auth/credentials/credentials.h"
#include "auth/credentials/credentials_krb5.h"
#include "auth/kerberos/kerberos_credentials.h"
#include "auth/gensec/gensec.h"
+#include "auth/gensec/gensec_internal.h"
#include "auth/gensec/gensec_proto.h"
+#include "auth/gensec/gensec_toplevel_proto.h"
#include "param/param.h"
#include "auth/auth_sam_reply.h"
#include "lib/util/util_net.h"
+#include "../lib/util/asn1.h"
+#include "auth/kerberos/pac_utils.h"
+#include "gensec_krb5.h"
+
+_PUBLIC_ NTSTATUS gensec_krb5_init(TALLOC_CTX *);
enum GENSEC_KRB5_STATE {
GENSEC_KRB5_SERVER_START,
};
struct gensec_krb5_state {
- DATA_BLOB session_key;
- DATA_BLOB pac;
enum GENSEC_KRB5_STATE state_position;
struct smb_krb5_context *smb_krb5_context;
krb5_auth_context auth_context;
return 0;
}
if (gensec_krb5_state->enc_ticket.length) {
- kerberos_free_data_contents(gensec_krb5_state->smb_krb5_context->krb5_context,
+ smb_krb5_free_data_contents(gensec_krb5_state->smb_krb5_context->krb5_context,
&gensec_krb5_state->enc_ticket);
}
return NT_STATUS_INVALID_PARAMETER;
}
- gensec_krb5_state = talloc(gensec_security, struct gensec_krb5_state);
+ gensec_krb5_state = talloc_zero(gensec_security, struct gensec_krb5_state);
if (!gensec_krb5_state) {
return NT_STATUS_NO_MEMORY;
}
gensec_security->private_data = gensec_krb5_state;
- gensec_krb5_state->smb_krb5_context = NULL;
- gensec_krb5_state->auth_context = NULL;
- gensec_krb5_state->ticket = NULL;
- ZERO_STRUCT(gensec_krb5_state->enc_ticket);
- gensec_krb5_state->keyblock = NULL;
- gensec_krb5_state->session_key = data_blob(NULL, 0);
- gensec_krb5_state->pac = data_blob(NULL, 0);
gensec_krb5_state->gssapi = gssapi;
talloc_set_destructor(gensec_krb5_state, gensec_krb5_destroy);
if (cli_credentials_get_krb5_context(creds,
- gensec_security->event_ctx,
gensec_security->settings->lp_ctx, &gensec_krb5_state->smb_krb5_context)) {
talloc_free(gensec_krb5_state);
return NT_STATUS_INTERNAL_ERROR;
tlocal_addr = gensec_get_local_address(gensec_security);
if (tlocal_addr) {
- ssize_t socklen;
- struct sockaddr_storage ss;
+ struct samba_sockaddr addr;
+ bool ok;
- socklen = tsocket_address_bsd_sockaddr(tlocal_addr,
- (struct sockaddr *) &ss,
- sizeof(struct sockaddr_storage));
- if (socklen < 0) {
+ addr.sa_socklen = tsocket_address_bsd_sockaddr(
+ tlocal_addr, &addr.u.sa, sizeof(addr.u.sa));
+ if (addr.sa_socklen < 0) {
+ talloc_free(gensec_krb5_state);
return NT_STATUS_INTERNAL_ERROR;
}
- ret = krb5_sockaddr2address(gensec_krb5_state->smb_krb5_context->krb5_context,
- (const struct sockaddr *) &ss, &my_krb5_addr);
- if (ret) {
- DEBUG(1,("gensec_krb5_start: krb5_sockaddr2address (local) failed (%s)\n",
- smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context,
- ret, gensec_krb5_state)));
+ ok = smb_krb5_sockaddr_to_kaddr(&addr.u.ss, &my_krb5_addr);
+ if (!ok) {
+ DBG_WARNING("smb_krb5_sockaddr_to_kaddr (local) failed\n");
talloc_free(gensec_krb5_state);
return NT_STATUS_INTERNAL_ERROR;
}
tremote_addr = gensec_get_remote_address(gensec_security);
if (tremote_addr) {
- ssize_t socklen;
- struct sockaddr_storage ss;
+ struct samba_sockaddr addr;
+ bool ok;
- socklen = tsocket_address_bsd_sockaddr(tremote_addr,
- (struct sockaddr *) &ss,
- sizeof(struct sockaddr_storage));
- if (socklen < 0) {
+ addr.sa_socklen = tsocket_address_bsd_sockaddr(
+ tremote_addr, &addr.u.sa, sizeof(addr.u.sa));
+ if (addr.sa_socklen < 0) {
+ talloc_free(gensec_krb5_state);
return NT_STATUS_INTERNAL_ERROR;
}
- ret = krb5_sockaddr2address(gensec_krb5_state->smb_krb5_context->krb5_context,
- (const struct sockaddr *) &ss, &peer_krb5_addr);
- if (ret) {
- DEBUG(1,("gensec_krb5_start: krb5_sockaddr2address (local) failed (%s)\n",
- smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context,
- ret, gensec_krb5_state)));
+ ok = smb_krb5_sockaddr_to_kaddr(&addr.u.ss, &peer_krb5_addr);
+ if (!ok) {
+ DBG_WARNING("smb_krb5_sockaddr_to_kaddr (remote) failed\n");
talloc_free(gensec_krb5_state);
return NT_STATUS_INTERNAL_ERROR;
}
static NTSTATUS gensec_krb5_common_client_start(struct gensec_security *gensec_security, bool gssapi)
{
+ const char *hostname;
struct gensec_krb5_state *gensec_krb5_state;
- krb5_error_code ret;
NTSTATUS nt_status;
- struct ccache_container *ccache_container;
- const char *hostname;
- const char *error_string;
- const char *principal;
- krb5_data in_data;
-
hostname = gensec_get_target_hostname(gensec_security);
if (!hostname) {
- DEBUG(1, ("Could not determine hostname for target computer, cannot use kerberos\n"));
+ DEBUG(3, ("No hostname for target computer passed in, cannot use kerberos for this connection\n"));
return NT_STATUS_INVALID_PARAMETER;
}
if (is_ipaddress(hostname)) {
gensec_krb5_state->ap_req_options = AP_OPTS_USE_SUBKEY;
if (gensec_krb5_state->gssapi) {
- /* The Fake GSSAPI modal emulates Samba3, which does not do mutual authentication */
+ /* The Fake GSSAPI model emulates Samba3, which does not do mutual authentication */
if (gensec_setting_bool(gensec_security->settings, "gensec_fake_gssapi_krb5", "mutual", false)) {
gensec_krb5_state->ap_req_options |= AP_OPTS_MUTUAL_REQUIRED;
}
gensec_krb5_state->ap_req_options |= AP_OPTS_MUTUAL_REQUIRED;
}
}
+ return NT_STATUS_OK;
+}
+
+static NTSTATUS gensec_krb5_common_client_creds(struct gensec_security *gensec_security,
+ struct tevent_context *ev)
+{
+ struct gensec_krb5_state *gensec_krb5_state;
+ krb5_error_code ret;
+ struct ccache_container *ccache_container;
+ const char *error_string;
+ const char *principal;
+ const char *hostname;
+ krb5_data in_data = { .length = 0 };
+ krb5_data *in_data_p = NULL;
+#ifdef SAMBA4_USES_HEIMDAL
+ struct tevent_context *previous_ev;
+#endif
+
+ if (lpcfg_parm_bool(gensec_security->settings->lp_ctx,
+ NULL, "gensec_krb5", "send_authenticator_checksum", true)) {
+ in_data_p = &in_data;
+ }
+
+ gensec_krb5_state = (struct gensec_krb5_state *)gensec_security->private_data;
principal = gensec_get_target_principal(gensec_security);
+ hostname = gensec_get_target_hostname(gensec_security);
ret = cli_credentials_get_ccache(gensec_get_credentials(gensec_security),
- gensec_security->event_ctx,
+ ev,
gensec_security->settings->lp_ctx, &ccache_container, &error_string);
switch (ret) {
case 0:
break;
case KRB5KDC_ERR_PREAUTH_FAILED:
+ case KRB5KDC_ERR_C_PRINCIPAL_UNKNOWN:
return NT_STATUS_LOGON_FAILURE;
case KRB5_KDC_UNREACH:
DEBUG(3, ("Cannot reach a KDC we require to contact %s: %s\n", principal, error_string));
DEBUG(1, ("gensec_krb5_start: Aquiring initiator credentials failed: %s\n", error_string));
return NT_STATUS_UNSUCCESSFUL;
}
- in_data.length = 0;
- if (principal && lp_client_use_spnego_principal(gensec_security->settings->lp_ctx)) {
+#ifdef SAMBA4_USES_HEIMDAL
+ /* Do this every time, in case we have weird recursive issues here */
+ ret = smb_krb5_context_set_event_ctx(gensec_krb5_state->smb_krb5_context, ev, &previous_ev);
+ if (ret != 0) {
+ DEBUG(1, ("gensec_krb5_start: Setting event context failed\n"));
+ return NT_STATUS_NO_MEMORY;
+ }
+#endif
+ if (principal) {
krb5_principal target_principal;
ret = krb5_parse_name(gensec_krb5_state->smb_krb5_context->krb5_context, principal,
&target_principal);
if (ret == 0) {
- ret = krb5_mk_req_exact(gensec_krb5_state->smb_krb5_context->krb5_context,
- &gensec_krb5_state->auth_context,
- gensec_krb5_state->ap_req_options,
- target_principal,
- &in_data, ccache_container->ccache,
- &gensec_krb5_state->enc_ticket);
- krb5_free_principal(gensec_krb5_state->smb_krb5_context->krb5_context,
+ krb5_creds this_cred;
+ krb5_creds *cred;
+
+ ZERO_STRUCT(this_cred);
+ ret = krb5_cc_get_principal(gensec_krb5_state->smb_krb5_context->krb5_context,
+ ccache_container->ccache,
+ &this_cred.client);
+ if (ret != 0) {
+ krb5_free_principal(gensec_krb5_state->smb_krb5_context->krb5_context,
+ target_principal);
+ return NT_STATUS_UNSUCCESSFUL;
+ }
+
+ ret = krb5_copy_principal(gensec_krb5_state->smb_krb5_context->krb5_context,
+ target_principal,
+ &this_cred.server);
+ krb5_free_principal(gensec_krb5_state->smb_krb5_context->krb5_context,
target_principal);
+ if (ret != 0) {
+ krb5_free_cred_contents(gensec_krb5_state->smb_krb5_context->krb5_context,
+ &this_cred);
+ return NT_STATUS_UNSUCCESSFUL;
+ }
+ this_cred.times.endtime = 0;
+
+ ret = krb5_get_credentials(gensec_krb5_state->smb_krb5_context->krb5_context,
+ 0,
+ ccache_container->ccache,
+ &this_cred,
+ &cred);
+ krb5_free_cred_contents(gensec_krb5_state->smb_krb5_context->krb5_context,
+ &this_cred);
+ if (ret != 0) {
+ return NT_STATUS_UNSUCCESSFUL;
+ }
+
+ ret = krb5_mk_req_extended(gensec_krb5_state->smb_krb5_context->krb5_context,
+ &gensec_krb5_state->auth_context,
+ gensec_krb5_state->ap_req_options,
+ in_data_p,
+ cred,
+ &gensec_krb5_state->enc_ticket);
}
} else {
ret = krb5_mk_req(gensec_krb5_state->smb_krb5_context->krb5_context,
&gensec_krb5_state->auth_context,
gensec_krb5_state->ap_req_options,
- gensec_get_target_service(gensec_security),
- hostname,
- &in_data, ccache_container->ccache,
+ discard_const_p(char, gensec_get_target_service(gensec_security)),
+ discard_const_p(char, hostname),
+ in_data_p, ccache_container->ccache,
&gensec_krb5_state->enc_ticket);
}
+
+#ifdef SAMBA4_USES_HEIMDAL
+ smb_krb5_context_remove_event_ctx(gensec_krb5_state->smb_krb5_context, previous_ev, ev);
+#endif
+
switch (ret) {
case 0:
return NT_STATUS_OK;
/* Too much clock skew - we will need to kinit to re-skew the clock */
case KRB5KRB_AP_ERR_SKEW:
case KRB5_KDCREP_SKEW:
- {
DEBUG(3, ("kerberos (mk_req) failed: %s\n",
smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context, ret, gensec_krb5_state)));
- /*fall through*/
- }
-
+ FALL_THROUGH;
/* just don't print a message for these really ordinary messages */
case KRB5_FCC_NOFILE:
case KRB5_CC_NOTFOUND:
return gensec_krb5_common_client_start(gensec_security, true);
}
-/**
- * Check if the packet is one for this mechansim
- *
- * @param gensec_security GENSEC state
- * @param in The request, as a DATA_BLOB
- * @return Error, INVALID_PARAMETER if it's not a packet for us
- * or NT_STATUS_OK if the packet is ok.
- */
-
-static NTSTATUS gensec_fake_gssapi_krb5_magic(struct gensec_security *gensec_security,
- const DATA_BLOB *in)
+
+/*
+ generate a krb5 GSS-API wrapper packet given a ticket
+*/
+static DATA_BLOB gensec_gssapi_gen_krb5_wrap(TALLOC_CTX *mem_ctx, const DATA_BLOB *ticket, const uint8_t tok_id[2])
{
- if (gensec_gssapi_check_oid(in, GENSEC_OID_KERBEROS5)) {
- return NT_STATUS_OK;
- } else {
- return NT_STATUS_INVALID_PARAMETER;
+ struct asn1_data *data;
+ DATA_BLOB ret = data_blob_null;
+
+ data = asn1_init(mem_ctx);
+ if (!data || !ticket->data) {
+ return ret;
}
+
+ if (!asn1_push_tag(data, ASN1_APPLICATION(0))) goto err;
+ if (!asn1_write_OID(data, GENSEC_OID_KERBEROS5)) goto err;
+
+ if (!asn1_write(data, tok_id, 2)) goto err;
+ if (!asn1_write(data, ticket->data, ticket->length)) goto err;
+ if (!asn1_pop_tag(data)) goto err;
+
+
+ if (!asn1_extract_blob(data, mem_ctx, &ret)) {
+ goto err;
+ }
+ asn1_free(data);
+
+ return ret;
+
+ err:
+
+ DEBUG(1, ("Failed to build krb5 wrapper at offset %d\n",
+ (int)asn1_current_ofs(data)));
+ asn1_free(data);
+ return ret;
}
+/*
+ parse a krb5 GSS-API wrapper packet giving a ticket
+*/
+static bool gensec_gssapi_parse_krb5_wrap(TALLOC_CTX *mem_ctx, const DATA_BLOB *blob, DATA_BLOB *ticket, uint8_t tok_id[2])
+{
+ bool ret = false;
+ struct asn1_data *data = asn1_init(mem_ctx);
+ int data_remaining;
+
+ if (!data) {
+ return false;
+ }
+
+ if (!asn1_load(data, *blob)) goto err;
+ if (!asn1_start_tag(data, ASN1_APPLICATION(0))) goto err;
+ if (!asn1_check_OID(data, GENSEC_OID_KERBEROS5)) goto err;
+
+ data_remaining = asn1_tag_remaining(data);
+
+ if (data_remaining < 3) {
+ asn1_set_error(data);
+ } else {
+ if (!asn1_read(data, tok_id, 2)) goto err;
+ data_remaining -= 2;
+ *ticket = data_blob_talloc(mem_ctx, NULL, data_remaining);
+ if (!asn1_read(data, ticket->data, ticket->length)) goto err;
+ }
+
+ if (!asn1_end_tag(data)) goto err;
+
+ ret = !asn1_has_error(data);
+
+ err:
-/**
- * Next state function for the Krb5 GENSEC mechanism
- *
- * @param gensec_krb5_state KRB5 State
- * @param out_mem_ctx The TALLOC_CTX for *out to be allocated on
- * @param in The request, as a DATA_BLOB
- * @param out The reply, as an talloc()ed DATA_BLOB, on *out_mem_ctx
- * @return Error, MORE_PROCESSING_REQUIRED if a reply is sent,
- * or NT_STATUS_OK if the user is authenticated.
- */
-
-static NTSTATUS gensec_krb5_update(struct gensec_security *gensec_security,
- TALLOC_CTX *out_mem_ctx,
- const DATA_BLOB in, DATA_BLOB *out)
+ asn1_free(data);
+
+ return ret;
+}
+
+static NTSTATUS gensec_krb5_update_internal(struct gensec_security *gensec_security,
+ TALLOC_CTX *out_mem_ctx,
+ struct tevent_context *ev,
+ const DATA_BLOB in, DATA_BLOB *out)
{
struct gensec_krb5_state *gensec_krb5_state = (struct gensec_krb5_state *)gensec_security->private_data;
krb5_error_code ret = 0;
{
DATA_BLOB unwrapped_out;
+ nt_status = gensec_krb5_common_client_creds(gensec_security, ev);
+ if (!NT_STATUS_IS_OK(nt_status)) {
+ return nt_status;
+ }
+
if (gensec_krb5_state->gssapi) {
unwrapped_out = data_blob_talloc(out_mem_ctx, gensec_krb5_state->enc_ticket.data, gensec_krb5_state->enc_ticket.length);
}
/* TODO: check the tok_id */
- inbuf.data = unwrapped_in.data;
+ inbuf.data = (char *)unwrapped_in.data;
inbuf.length = unwrapped_in.length;
ret = krb5_rd_rep(gensec_krb5_state->smb_krb5_context->krb5_context,
gensec_krb5_state->auth_context,
/* Grab the keytab, however generated */
ret = cli_credentials_get_keytab(gensec_get_credentials(gensec_security),
- gensec_security->event_ctx,
gensec_security->settings->lp_ctx, &keytab);
if (ret) {
return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
}
- /* This ensures we lookup the correct entry in that keytab */
+ /* This ensures we lookup the correct entry in that
+ * keytab. A NULL principal is acceptable, and means
+ * that the krb5 libs should search the keytab at
+ * accept time for any matching key */
ret = principal_from_credentials(out_mem_ctx, gensec_get_credentials(gensec_security),
gensec_krb5_state->smb_krb5_context,
&server_in_keytab, &obtained, &error_string);
return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
}
+ if (keytab->password_based || obtained < CRED_SPECIFIED) {
+ /*
+ * Use match-by-key in this case (matches
+ * cli_credentials_get_server_gss_creds()
+ * behaviour). No need to free the memory,
+ * this is handled with a talloc destructor.
+ */
+ server_in_keytab = NULL;
+ }
+
/* Parse the GSSAPI wrapping, if it's there... (win2k3 allows it to be omited) */
if (gensec_krb5_state->gssapi
&& gensec_gssapi_parse_krb5_wrap(out_mem_ctx, &in, &unwrapped_in, tok_id)) {
- inbuf.data = unwrapped_in.data;
+ inbuf.data = (char *)unwrapped_in.data;
inbuf.length = unwrapped_in.length;
} else {
- inbuf.data = in.data;
+ inbuf.data = (char *)in.data;
inbuf.length = in.length;
}
- ret = smb_rd_req_return_stuff(gensec_krb5_state->smb_krb5_context->krb5_context,
- &gensec_krb5_state->auth_context,
- &inbuf, keytab->keytab, server_in_keytab,
- &outbuf,
- &gensec_krb5_state->ticket,
+ ret = smb_krb5_rd_req_decoded(gensec_krb5_state->smb_krb5_context->krb5_context,
+ &gensec_krb5_state->auth_context,
+ &inbuf,
+ keytab->keytab,
+ server_in_keytab,
+ &outbuf,
+ &gensec_krb5_state->ticket,
&gensec_krb5_state->keyblock);
if (ret) {
+ DBG_WARNING("smb_krb5_rd_req_decoded failed\n");
return NT_STATUS_LOGON_FAILURE;
}
unwrapped_out.data = (uint8_t *)outbuf.data;
} else {
*out = data_blob_talloc(out_mem_ctx, outbuf.data, outbuf.length);
}
- krb5_data_free(&outbuf);
+ smb_krb5_free_data_contents(gensec_krb5_state->smb_krb5_context->krb5_context,
+ &outbuf);
return NT_STATUS_OK;
}
}
}
+struct gensec_krb5_update_state {
+ NTSTATUS status;
+ DATA_BLOB out;
+};
+
+static struct tevent_req *gensec_krb5_update_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ struct gensec_security *gensec_security,
+ const DATA_BLOB in)
+{
+ struct tevent_req *req = NULL;
+ struct gensec_krb5_update_state *state = NULL;
+ NTSTATUS status;
+
+ req = tevent_req_create(mem_ctx, &state,
+ struct gensec_krb5_update_state);
+ if (req == NULL) {
+ return NULL;
+ }
+
+ status = gensec_krb5_update_internal(gensec_security,
+ state, ev, in,
+ &state->out);
+ state->status = status;
+ if (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
+ tevent_req_done(req);
+ return tevent_req_post(req, ev);
+ }
+ if (tevent_req_nterror(req, status)) {
+ return tevent_req_post(req, ev);
+ }
+
+ tevent_req_done(req);
+ return tevent_req_post(req, ev);
+}
+
+static NTSTATUS gensec_krb5_update_recv(struct tevent_req *req,
+ TALLOC_CTX *out_mem_ctx,
+ DATA_BLOB *out)
+{
+ struct gensec_krb5_update_state *state =
+ tevent_req_data(req,
+ struct gensec_krb5_update_state);
+ NTSTATUS status;
+
+ *out = data_blob_null;
+
+ if (tevent_req_is_nterror(req, &status)) {
+ tevent_req_received(req);
+ return status;
+ }
+
+ *out = state->out;
+ talloc_steal(out_mem_ctx, state->out.data);
+ status = state->status;
+ tevent_req_received(req);
+ return status;
+}
+
static NTSTATUS gensec_krb5_session_key(struct gensec_security *gensec_security,
+ TALLOC_CTX *mem_ctx,
DATA_BLOB *session_key)
{
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;
krb5_auth_context auth_context = gensec_krb5_state->auth_context;
- krb5_keyblock *skey;
krb5_error_code err = -1;
+ bool remote = false;
+ bool ok;
if (gensec_krb5_state->state_position != GENSEC_KRB5_DONE) {
return NT_STATUS_NO_USER_SESSION_KEY;
}
- if (gensec_krb5_state->session_key.data) {
- *session_key = gensec_krb5_state->session_key;
- return NT_STATUS_OK;
- }
-
switch (gensec_security->gensec_role) {
case GENSEC_CLIENT:
- err = krb5_auth_con_getlocalsubkey(context, auth_context, &skey);
+ remote = false;
break;
case GENSEC_SERVER:
- err = krb5_auth_con_getremotesubkey(context, auth_context, &skey);
+ remote = true;
break;
}
- if (err == 0 && skey != NULL) {
- DEBUG(10, ("Got KRB5 session key of length %d\n",
- (int)KRB5_KEY_LENGTH(skey)));
- gensec_krb5_state->session_key = data_blob_talloc(gensec_krb5_state,
- KRB5_KEY_DATA(skey), KRB5_KEY_LENGTH(skey));
- *session_key = gensec_krb5_state->session_key;
- dump_data_pw("KRB5 Session Key:\n", session_key->data, session_key->length);
- krb5_free_keyblock(context, skey);
- return NT_STATUS_OK;
- } else {
+ ok = smb_krb5_get_smb_session_key(mem_ctx,
+ context,
+ auth_context,
+ session_key,
+ remote);
+ if (!ok) {
DEBUG(10, ("KRB5 error getting session key %d\n", err));
return NT_STATUS_NO_USER_SESSION_KEY;
}
+
+ return NT_STATUS_OK;
}
+#ifdef SAMBA4_USES_HEIMDAL
static NTSTATUS gensec_krb5_session_info(struct gensec_security *gensec_security,
+ TALLOC_CTX *mem_ctx,
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_serversupplied_info *server_info = NULL;
struct auth_session_info *session_info = NULL;
- struct PAC_LOGON_INFO *logon_info;
krb5_principal client_principal;
- char *principal_string;
+ char *principal_string = NULL;
- DATA_BLOB pac;
+ DATA_BLOB pac_blob, *pac_blob_ptr = NULL;
krb5_data pac_data;
krb5_error_code ret;
- TALLOC_CTX *mem_ctx = talloc_new(gensec_security);
- if (!mem_ctx) {
+ TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
+ if (!tmp_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",
+ DEBUG(5, ("krb5_ticket_get_client failed to get client principal: %s\n",
smb_get_krb5_error_message(context,
- ret, mem_ctx)));
- talloc_free(mem_ctx);
+ ret, tmp_ctx)));
+ talloc_free(tmp_ctx);
return NT_STATUS_NO_MEMORY;
}
if (ret) {
DEBUG(1, ("Unable to parse client principal: %s\n",
smb_get_krb5_error_message(context,
- ret, mem_ctx)));
- talloc_free(mem_ctx);
+ ret, tmp_ctx)));
+ krb5_free_principal(context, client_principal);
+ talloc_free(tmp_ctx);
return NT_STATUS_NO_MEMORY;
}
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)));
- krb5_free_principal(context, client_principal);
- free(principal_string);
- return NT_STATUS_ACCESS_DENIED;
- } else if (ret) {
+ 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_server_info_principal(mem_ctx,
- gensec_security->auth_context,
- principal_string,
- &server_info);
- if (!NT_STATUS_IS_OK(nt_status)) {
- 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));
- return NT_STATUS_ACCESS_DENIED;
- }
-
- krb5_free_principal(context, client_principal);
- free(principal_string);
-
- if (!NT_STATUS_IS_OK(nt_status)) {
- talloc_free(mem_ctx);
- return nt_status;
- }
+ ret, tmp_ctx)));
} else {
/* Found pac */
- union netr_Validation validation;
- free(principal_string);
-
- pac = data_blob_talloc(mem_ctx, pac_data.data, pac_data.length);
- if (!pac.data) {
+ pac_blob = data_blob_talloc(tmp_ctx, pac_data.data, pac_data.length);
+ smb_krb5_free_data_contents(context, &pac_data);
+ if (!pac_blob.data) {
+ free(principal_string);
krb5_free_principal(context, client_principal);
- talloc_free(mem_ctx);
+ talloc_free(tmp_ctx);
return NT_STATUS_NO_MEMORY;
}
/* decode and verify the pac */
- nt_status = kerberos_pac_logon_info(gensec_krb5_state,
- gensec_security->settings->iconv_convenience,
- &logon_info, pac,
- gensec_krb5_state->smb_krb5_context->krb5_context,
- NULL, gensec_krb5_state->keyblock,
- client_principal,
- gensec_krb5_state->ticket->ticket.authtime, NULL);
- krb5_free_principal(context, client_principal);
+ nt_status = kerberos_decode_pac(gensec_krb5_state,
+ pac_blob,
+ gensec_krb5_state->smb_krb5_context->krb5_context,
+ NULL, gensec_krb5_state->keyblock,
+ client_principal,
+ gensec_krb5_state->ticket->ticket.authtime, NULL);
if (!NT_STATUS_IS_OK(nt_status)) {
- talloc_free(mem_ctx);
+ free(principal_string);
+ krb5_free_principal(context, client_principal);
+ talloc_free(tmp_ctx);
return nt_status;
}
- validation.sam3 = &logon_info->info3;
- nt_status = make_server_info_netlogon_validation(mem_ctx,
- NULL,
- 3, &validation,
- &server_info);
- if (!NT_STATUS_IS_OK(nt_status)) {
- talloc_free(mem_ctx);
- return nt_status;
- }
+ pac_blob_ptr = &pac_blob;
}
- /* references the server_info into the session_info */
- nt_status = gensec_generate_session_info(mem_ctx, gensec_security, server_info, &session_info);
+ nt_status = gensec_generate_session_info_pac(tmp_ctx,
+ gensec_security,
+ gensec_krb5_state->smb_krb5_context,
+ pac_blob_ptr, principal_string,
+ gensec_get_remote_address(gensec_security),
+ &session_info);
+
+ free(principal_string);
+ krb5_free_principal(context, client_principal);
if (!NT_STATUS_IS_OK(nt_status)) {
- talloc_free(mem_ctx);
+ talloc_free(tmp_ctx);
return nt_status;
}
- nt_status = gensec_krb5_session_key(gensec_security, &session_info->session_key);
+ 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);
+ talloc_free(tmp_ctx);
return nt_status;
}
- *_session_info = session_info;
+ *_session_info = talloc_steal(mem_ctx, session_info);
+
+ talloc_free(tmp_ctx);
+ return NT_STATUS_OK;
+}
+#else /* MIT KERBEROS */
+static NTSTATUS gensec_krb5_session_info(struct gensec_security *gensec_security,
+ TALLOC_CTX *mem_ctx,
+ struct auth_session_info **psession_info)
+{
+ NTSTATUS 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_session_info *session_info = NULL;
+
+ krb5_principal client_principal;
+ char *principal_string = NULL;
+
+ krb5_authdata **auth_pac_data = NULL;
+ DATA_BLOB pac_blob, *pac_blob_ptr = NULL;
+
+ krb5_error_code code;
+
+ TALLOC_CTX *tmp_ctx;
+
+ tmp_ctx = talloc_new(mem_ctx);
+ if (tmp_ctx == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ code = krb5_copy_principal(context,
+ gensec_krb5_state->ticket->enc_part2->client,
+ &client_principal);
+ if (code != 0) {
+ DBG_INFO("krb5_copy_principal failed to copy client "
+ "principal: %s\n",
+ smb_get_krb5_error_message(context, code, tmp_ctx));
+ talloc_free(tmp_ctx);
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ code = krb5_unparse_name(context, client_principal, &principal_string);
+ if (code != 0) {
+ DBG_WARNING("Unable to parse client principal: %s\n",
+ smb_get_krb5_error_message(context, code, tmp_ctx));
+ krb5_free_principal(context, client_principal);
+ talloc_free(tmp_ctx);
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ code = krb5_find_authdata(context,
+ gensec_krb5_state->ticket->enc_part2->authorization_data,
+ NULL,
+ KRB5_AUTHDATA_WIN2K_PAC,
+ &auth_pac_data);
+ if (code != 0) {
+ /* NO pac */
+ DBG_INFO("krb5_find_authdata failed to find PAC: %s\n",
+ smb_get_krb5_error_message(context, code, tmp_ctx));
+ } else {
+ krb5_timestamp ticket_authtime =
+ gensec_krb5_state->ticket->enc_part2->times.authtime;
+
+ /* Found pac */
+ pac_blob = data_blob_talloc(tmp_ctx,
+ auth_pac_data[0]->contents,
+ auth_pac_data[0]->length);
+ krb5_free_authdata(context, auth_pac_data);
+ if (pac_blob.data == NULL) {
+ free(principal_string);
+ krb5_free_principal(context, client_principal);
+ talloc_free(tmp_ctx);
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ /* decode and verify the pac */
+ status = kerberos_decode_pac(gensec_krb5_state,
+ pac_blob,
+ context,
+ NULL,
+ gensec_krb5_state->keyblock,
+ client_principal,
+ ticket_authtime,
+ NULL);
+
+ if (!NT_STATUS_IS_OK(status)) {
+ free(principal_string);
+ krb5_free_principal(context, client_principal);
+ talloc_free(tmp_ctx);
+ return status;
+ }
+
+ pac_blob_ptr = &pac_blob;
+ }
+ krb5_free_principal(context, client_principal);
+
+ status = gensec_generate_session_info_pac(tmp_ctx,
+ gensec_security,
+ gensec_krb5_state->smb_krb5_context,
+ pac_blob_ptr,
+ principal_string,
+ gensec_get_remote_address(gensec_security),
+ &session_info);
+ SAFE_FREE(principal_string);
+ if (!NT_STATUS_IS_OK(status)) {
+ talloc_free(tmp_ctx);
+ return status;
+ }
+
+ status = gensec_krb5_session_key(gensec_security,
+ session_info,
+ &session_info->session_key);
+ if (!NT_STATUS_IS_OK(status)) {
+ talloc_free(tmp_ctx);
+ return status;
+ }
+
+ *psession_info = talloc_steal(mem_ctx, session_info);
+ talloc_free(tmp_ctx);
- talloc_steal(gensec_krb5_state, session_info);
- talloc_free(mem_ctx);
return NT_STATUS_OK;
}
+#endif /* SAMBA4_USES_HEIMDAL */
static NTSTATUS gensec_krb5_wrap(struct gensec_security *gensec_security,
TALLOC_CTX *mem_ctx,
krb5_error_code ret;
krb5_data input, output;
input.length = in->length;
- input.data = in->data;
+ input.data = (char *)in->data;
if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
ret = krb5_mk_priv(context, auth_context, &input, &output, NULL);
}
*out = data_blob_talloc(mem_ctx, output.data, output.length);
- krb5_data_free(&output);
+ smb_krb5_free_data_contents(context, &output);
} else {
return NT_STATUS_ACCESS_DENIED;
}
krb5_data input, output;
krb5_replay_data replay;
input.length = in->length;
- input.data = in->data;
+ input.data = (char *)in->data;
if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
ret = krb5_rd_priv(context, auth_context, &input, &output, &replay);
}
*out = data_blob_talloc(mem_ctx, output.data, output.length);
- krb5_data_free(&output);
+ smb_krb5_free_data_contents(context, &output);
} else {
return NT_STATUS_ACCESS_DENIED;
}
if (feature & GENSEC_FEATURE_SESSION_KEY) {
return true;
}
- if (!gensec_krb5_state->gssapi &&
- (feature & GENSEC_FEATURE_SEAL)) {
+ if (gensec_krb5_state->gssapi) {
+ return false;
+ }
+
+ /*
+ * krb5_mk_priv provides SIGN and SEAL
+ */
+ if (feature & GENSEC_FEATURE_SIGN) {
return true;
- }
-
+ }
+ if (feature & GENSEC_FEATURE_SEAL) {
+ return true;
+ }
+
return false;
}
+static const char *gensec_krb5_final_auth_type(struct gensec_security *gensec_security)
+{
+ return GENSEC_FINAL_AUTH_TYPE_KRB5;
+}
+
static const char *gensec_krb5_oids[] = {
GENSEC_OID_KERBEROS5,
GENSEC_OID_KERBEROS5_OLD,
.oid = gensec_krb5_oids,
.client_start = gensec_fake_gssapi_krb5_client_start,
.server_start = gensec_fake_gssapi_krb5_server_start,
- .update = gensec_krb5_update,
- .magic = gensec_fake_gssapi_krb5_magic,
+ .update_send = gensec_krb5_update_send,
+ .update_recv = gensec_krb5_update_recv,
+ .magic = gensec_magic_check_krb5_oid,
.session_key = gensec_krb5_session_key,
.session_info = gensec_krb5_session_info,
.have_feature = gensec_krb5_have_feature,
+ .final_auth_type = gensec_krb5_final_auth_type,
.enabled = false,
.kerberos = true,
- .priority = GENSEC_KRB5
+ .priority = GENSEC_KRB5,
};
static const struct gensec_security_ops gensec_krb5_security_ops = {
.name = "krb5",
.client_start = gensec_krb5_client_start,
.server_start = gensec_krb5_server_start,
- .update = gensec_krb5_update,
+ .update_send = gensec_krb5_update_send,
+ .update_recv = gensec_krb5_update_recv,
.session_key = gensec_krb5_session_key,
.session_info = gensec_krb5_session_info,
.have_feature = gensec_krb5_have_feature,
.wrap = gensec_krb5_wrap,
.unwrap = gensec_krb5_unwrap,
+ .final_auth_type = gensec_krb5_final_auth_type,
.enabled = true,
.kerberos = true,
.priority = GENSEC_KRB5
};
-_PUBLIC_ NTSTATUS gensec_krb5_init(void)
+_PUBLIC_ NTSTATUS gensec_krb5_init(TALLOC_CTX *ctx)
{
NTSTATUS ret;
- ret = gensec_register(&gensec_krb5_security_ops);
+ ret = gensec_register(ctx, &gensec_krb5_security_ops);
if (!NT_STATUS_IS_OK(ret)) {
DEBUG(0,("Failed to register '%s' gensec backend!\n",
gensec_krb5_security_ops.name));
return ret;
}
- ret = gensec_register(&gensec_fake_gssapi_krb5_security_ops);
+ ret = gensec_register(ctx, &gensec_fake_gssapi_krb5_security_ops);
if (!NT_STATUS_IS_OK(ret)) {
DEBUG(0,("Failed to register '%s' gensec backend!\n",
- gensec_krb5_security_ops.name));
+ gensec_fake_gssapi_krb5_security_ops.name));
return ret;
}
git.samba.org / samba.git / blobdiff