#ifdef HAVE_KRB5
-#define DEFAULT_KPASSWD_PORT 464
-
-#define KRB5_KPASSWD_VERS_CHANGEPW 1
-
-#define KRB5_KPASSWD_VERS_SETPW 0xff80
-#define KRB5_KPASSWD_VERS_SETPW_ALT 2
-
-/* Those are defined by kerberos-set-passwd-02.txt and are probably
+/* Those are defined by kerberos-set-passwd-02.txt and are probably
* not supported by M$ implementation */
#define KRB5_KPASSWD_POLICY_REJECT 8
#define KRB5_KPASSWD_BAD_PRINCIPAL 9
* requests - valid response for CHPW v2 replies.
*/
-#define krb5_is_krb_error(packet) \
- ( packet && packet->length && (((char *)packet->data)[0] == 0x7e || ((char *)packet->data)[0] == 0x5e))
-
-/* This implements kerberos password change protocol as specified in
- * kerb-chg-password-02.txt and kerberos-set-passwd-02.txt
- * as well as microsoft version of the protocol
- * as specified in kerberos-set-passwd-00.txt
- */
-static DATA_BLOB encode_krb5_setpw(const char *principal, const char *password)
-{
- char* princ_part1 = NULL;
- char* princ_part2 = NULL;
- char* realm = NULL;
- char* c;
- char* princ;
-
- ASN1_DATA *req;
- DATA_BLOB ret;
-
-
- princ = SMB_STRDUP(principal);
-
- if ((c = strchr_m(princ, '/')) == NULL) {
- c = princ;
- } else {
- *c = '\0';
- c++;
- princ_part1 = princ;
- }
-
- princ_part2 = c;
-
- if ((c = strchr_m(c, '@')) != NULL) {
- *c = '\0';
- c++;
- realm = c;
- } else {
- /* We must have a realm component. */
- return data_blob_null;
- }
-
- req = asn1_init(talloc_tos());
- if (req == NULL) {
- return data_blob_null;
- }
-
- asn1_push_tag(req, ASN1_SEQUENCE(0));
- asn1_push_tag(req, ASN1_CONTEXT(0));
- asn1_write_OctetString(req, password, strlen(password));
- asn1_pop_tag(req);
-
- asn1_push_tag(req, ASN1_CONTEXT(1));
- asn1_push_tag(req, ASN1_SEQUENCE(0));
-
- asn1_push_tag(req, ASN1_CONTEXT(0));
- asn1_write_Integer(req, 1);
- asn1_pop_tag(req);
-
- asn1_push_tag(req, ASN1_CONTEXT(1));
- asn1_push_tag(req, ASN1_SEQUENCE(0));
-
- if (princ_part1) {
- asn1_write_GeneralString(req, princ_part1);
- }
-
- asn1_write_GeneralString(req, princ_part2);
- asn1_pop_tag(req);
- asn1_pop_tag(req);
- asn1_pop_tag(req);
- asn1_pop_tag(req);
-
- asn1_push_tag(req, ASN1_CONTEXT(2));
- asn1_write_GeneralString(req, realm);
- asn1_pop_tag(req);
- asn1_pop_tag(req);
-
- ret = data_blob(req->data, req->length);
- asn1_free(req);
-
- free(princ);
-
- return ret;
-}
-
-static krb5_error_code build_kpasswd_request(uint16 pversion,
- krb5_context context,
- krb5_auth_context auth_context,
- krb5_data *ap_req,
- const char *princ,
- const char *passwd,
- bool use_tcp,
- krb5_data *packet)
-{
- krb5_error_code ret;
- krb5_data cipherpw;
- krb5_data encoded_setpw;
- krb5_replay_data replay;
- char *p, *msg_start;
- DATA_BLOB setpw;
- unsigned int msg_length;
-
- ret = krb5_auth_con_setflags(context,
- auth_context,KRB5_AUTH_CONTEXT_DO_SEQUENCE);
- if (ret) {
- DEBUG(1,("krb5_auth_con_setflags failed (%s)\n",
- error_message(ret)));
- return ret;
- }
-
- /* handle protocol differences in chpw and setpw */
- if (pversion == KRB5_KPASSWD_VERS_CHANGEPW)
- setpw = data_blob(passwd, strlen(passwd));
- else if (pversion == KRB5_KPASSWD_VERS_SETPW ||
- pversion == KRB5_KPASSWD_VERS_SETPW_ALT)
- setpw = encode_krb5_setpw(princ, passwd);
- else
- return EINVAL;
-
- if (setpw.data == NULL || setpw.length == 0) {
- return EINVAL;
- }
-
- encoded_setpw.data = (char *)setpw.data;
- encoded_setpw.length = setpw.length;
-
- ret = krb5_mk_priv(context, auth_context,
- &encoded_setpw, &cipherpw, &replay);
-
- data_blob_free(&setpw); /*from 'encode_krb5_setpw(...)' */
-
- if (ret) {
- DEBUG(1,("krb5_mk_priv failed (%s)\n", error_message(ret)));
- return ret;
- }
-
- packet->data = (char *)SMB_MALLOC(ap_req->length + cipherpw.length + (use_tcp ? 10 : 6 ));
- if (!packet->data)
- return -1;
-
-
-
- /* see the RFC for details */
-
- msg_start = p = ((char *)packet->data) + (use_tcp ? 4 : 0);
- p += 2;
- RSSVAL(p, 0, pversion);
- p += 2;
- RSSVAL(p, 0, ap_req->length);
- p += 2;
- memcpy(p, ap_req->data, ap_req->length);
- p += ap_req->length;
- memcpy(p, cipherpw.data, cipherpw.length);
- p += cipherpw.length;
- packet->length = PTR_DIFF(p,packet->data);
- msg_length = PTR_DIFF(p,msg_start);
-
- if (use_tcp) {
- RSIVAL(packet->data, 0, msg_length);
- }
- RSSVAL(msg_start, 0, msg_length);
-
- free(cipherpw.data); /* from 'krb5_mk_priv(...)' */
-
- return 0;
-}
-
-static const struct kpasswd_errors {
- int result_code;
- const char *error_string;
-} kpasswd_errors[] = {
- {KRB5_KPASSWD_MALFORMED, "Malformed request error"},
- {KRB5_KPASSWD_HARDERROR, "Server error"},
- {KRB5_KPASSWD_AUTHERROR, "Authentication error"},
- {KRB5_KPASSWD_SOFTERROR, "Password change rejected"},
- {KRB5_KPASSWD_ACCESSDENIED, "Client does not have proper authorization"},
- {KRB5_KPASSWD_BAD_VERSION, "Protocol version not supported"},
- {KRB5_KPASSWD_INITIAL_FLAG_NEEDED, "Authorization ticket must have initial flag set"},
- {KRB5_KPASSWD_POLICY_REJECT, "Password rejected due to policy requirements"},
- {KRB5_KPASSWD_BAD_PRINCIPAL, "Target principal does not exist"},
- {KRB5_KPASSWD_ETYPE_NOSUPP, "Unsupported encryption type"},
- {0, NULL}
-};
-
-static krb5_error_code setpw_result_code_string(krb5_context context,
- int result_code,
- const char **code_string)
-{
- unsigned int idx = 0;
-
- while (kpasswd_errors[idx].error_string != NULL) {
- if (kpasswd_errors[idx].result_code ==
- result_code) {
- *code_string = kpasswd_errors[idx].error_string;
- return 0;
- }
- idx++;
- }
- *code_string = "Password change failed";
- return (0);
-}
-
- krb5_error_code kpasswd_err_to_krb5_err(krb5_error_code res_code)
+static krb5_error_code kpasswd_err_to_krb5_err(krb5_error_code res_code)
{
switch(res_code) {
case KRB5_KPASSWD_ACCESSDENIED:
return KRB5KRB_ERR_GENERIC;
}
}
-static krb5_error_code parse_setpw_reply(krb5_context context,
- bool use_tcp,
- krb5_auth_context auth_context,
- krb5_data *packet)
-{
- krb5_data ap_rep;
- char *p;
- int vnum, ret, res_code;
- krb5_data cipherresult;
- krb5_data clearresult;
- krb5_ap_rep_enc_part *ap_rep_enc;
- krb5_replay_data replay;
- unsigned int msg_length = packet->length;
-
-
- if (packet->length < (use_tcp ? 8 : 4)) {
- return KRB5KRB_AP_ERR_MODIFIED;
- }
-
- p = (char *)packet->data;
- /*
- ** see if it is an error
- */
- if (krb5_is_krb_error(packet)) {
-
- ret = handle_krberror_packet(context, packet);
- if (ret) {
- return ret;
- }
- }
-
-
- /* tcp... */
- if (use_tcp) {
- msg_length -= 4;
- if (RIVAL(p, 0) != msg_length) {
- DEBUG(1,("Bad TCP packet length (%d/%d) from kpasswd server\n",
- RIVAL(p, 0), msg_length));
- return KRB5KRB_AP_ERR_MODIFIED;
- }
-
- p += 4;
- }
-
- if (RSVAL(p, 0) != msg_length) {
- DEBUG(1,("Bad packet length (%d/%d) from kpasswd server\n",
- RSVAL(p, 0), msg_length));
- return KRB5KRB_AP_ERR_MODIFIED;
- }
-
- p += 2;
-
- vnum = RSVAL(p, 0); p += 2;
-
- /* FIXME: According to standard there is only one type of reply */
- if (vnum != KRB5_KPASSWD_VERS_SETPW &&
- vnum != KRB5_KPASSWD_VERS_SETPW_ALT &&
- vnum != KRB5_KPASSWD_VERS_CHANGEPW) {
- DEBUG(1,("Bad vnum (%d) from kpasswd server\n", vnum));
- return KRB5KDC_ERR_BAD_PVNO;
- }
-
- ap_rep.length = RSVAL(p, 0); p += 2;
-
- if (p + ap_rep.length >= (char *)packet->data + packet->length) {
- DEBUG(1,("ptr beyond end of packet from kpasswd server\n"));
- return KRB5KRB_AP_ERR_MODIFIED;
- }
-
- if (ap_rep.length == 0) {
- DEBUG(1,("got unencrypted setpw result?!\n"));
- return KRB5KRB_AP_ERR_MODIFIED;
- }
-
- /* verify ap_rep */
- ap_rep.data = p;
- p += ap_rep.length;
-
- ret = krb5_rd_rep(context, auth_context, &ap_rep, &ap_rep_enc);
- if (ret) {
- DEBUG(1,("failed to rd setpw reply (%s)\n", error_message(ret)));
- return KRB5KRB_AP_ERR_MODIFIED;
- }
-
- krb5_free_ap_rep_enc_part(context, ap_rep_enc);
-
- cipherresult.data = p;
- cipherresult.length = ((char *)packet->data + packet->length) - p;
-
- ret = krb5_rd_priv(context, auth_context, &cipherresult, &clearresult,
- &replay);
- if (ret) {
- DEBUG(1,("failed to decrypt setpw reply (%s)\n", error_message(ret)));
- return KRB5KRB_AP_ERR_MODIFIED;
- }
-
- if (clearresult.length < 2) {
- free(clearresult.data);
- ret = KRB5KRB_AP_ERR_MODIFIED;
- return KRB5KRB_AP_ERR_MODIFIED;
- }
-
- p = (char *)clearresult.data;
-
- res_code = RSVAL(p, 0);
-
- free(clearresult.data);
-
- if ((res_code < KRB5_KPASSWD_SUCCESS) ||
- (res_code > KRB5_KPASSWD_ETYPE_NOSUPP)) {
- return KRB5KRB_AP_ERR_MODIFIED;
- }
-
- if (res_code == KRB5_KPASSWD_SUCCESS) {
- return 0;
- } else {
- const char *errstr;
- setpw_result_code_string(context, res_code, &errstr);
- DEBUG(1, ("Error changing password: %s (%d)\n", errstr, res_code));
-
- return kpasswd_err_to_krb5_err(res_code);
- }
-}
-
-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 *princ,
+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;
- char *realm = NULL;
- unsigned int realm_len = 0;
- krb5_creds creds, *credsp = NULL;
+ krb5_principal princ = NULL;
krb5_ccache ccache = NULL;
+ int result_code;
+ krb5_data result_code_string = { 0 };
+ krb5_data result_string = { 0 };
- 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 (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_cc_get_principal(context, ccache, &creds.client);
+ ret = krb5_set_password_using_ccache(context, ccache, newpw, princ,
+ &result_code,
+ &result_code_string,
+ &result_string);
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);
+ DEBUG(1, ("krb5_set_password failed (%s)\n", error_message(ret)));
+ aret = ADS_ERROR_KRB5(ret);
+ goto done;
}
- 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);
- free(realm);
- 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);
+ 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;
}
-
- 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);
+ aret = ADS_SUCCESS;
- krb5_free_creds(context, credsp);
- krb5_free_principal(context, creds.client);
- krb5_free_principal(context, creds.server);
+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);
krb5_get_init_creds_opt opts;
krb5_creds creds;
char *chpw_princ = NULL, *password;
- char *realm = NULL;
+ const char *realm = NULL;
+ int result_code;
+ krb5_data result_code_string = { 0 };
+ krb5_data result_string = { 0 };
initialize_krb5_error_table();
ret = krb5_init_context(&context);
return ADS_ERROR_KRB5(ret);
}
- aret = do_krb5_kpasswd_request(context, kdc_host,
- KRB5_KPASSWD_VERS_CHANGEPW,
- &creds, principal, newpw);
+ ret = krb5_change_password(context, &creds, 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);
git.samba.org / abartlet / samba.git / .git / commitdiff