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-rw-r--r--source/libads/krb5_setpw.c505
1 files changed, 0 insertions, 505 deletions
diff --git a/source/libads/krb5_setpw.c b/source/libads/krb5_setpw.c
deleted file mode 100644
index 8079c0953fc..00000000000
--- a/source/libads/krb5_setpw.c
+++ /dev/null
@@ -1,505 +0,0 @@
-/*
- Unix SMB/CIFS implementation.
- krb5 set password implementation
- Copyright (C) Andrew Tridgell 2001
- Copyright (C) Remus Koos 2001 (remuskoos@yahoo.com)
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-*/
-
-#include "includes.h"
-
-#ifdef HAVE_KRB5
-
-#define DEFAULT_KPASSWD_PORT 464
-#define KRB5_KPASSWD_VERS_CHANGEPW 1
-#define KRB5_KPASSWD_VERS_SETPW 0xff80
-#define KRB5_KPASSWD_ACCESSDENIED 5
-#define KRB5_KPASSWD_BAD_VERSION 6
-
-/* This implements the Kerb password change protocol as specifed in
- * kerb-chg-password-02.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 = strdup(principal);
-
- if ((c = strchr(princ, '/')) == NULL) {
- c = princ;
- } else {
- *c = '\0';
- c++;
- princ_part1 = princ;
- }
-
- princ_part2 = c;
-
- if ((c = strchr(c, '@')) != NULL) {
- *c = '\0';
- c++;
- realm = c;
- }
-
- memset(&req, 0, sizeof(req));
-
- 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_setpw_request(krb5_context context,
- krb5_auth_context auth_context,
- krb5_data *ap_req,
- const char *princ,
- const char *passwd,
- krb5_data *packet)
-{
- krb5_error_code ret;
- krb5_data cipherpw;
- krb5_data encoded_setpw;
- krb5_replay_data replay;
- char *p;
- DATA_BLOB setpw;
-
- 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;
- }
-
- setpw = encode_krb5_setpw(princ, passwd);
-
- encoded_setpw.data = 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 *)malloc(ap_req->length + cipherpw.length + 6);
-
- /* see the RFC for details */
- p = packet->data + 2;
- RSSVAL(p, 0, 0xff80); 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);
- RSSVAL(packet->data, 0, packet->length);
-
- free(cipherpw.data); /* from 'krb5_mk_priv(...)' */
-
- return 0;
-}
-
-static krb5_error_code parse_setpw_reply(krb5_context context,
- 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;
-
- if (packet->length < 4) {
- return KRB5KRB_AP_ERR_MODIFIED;
- }
-
- p = packet->data;
-
- if (packet->data[0] == 0x7e || packet->data[0] == 0x5e) {
- /* it's an error packet. We should parse it ... */
- DEBUG(1,("Got error packet 0x%x from kpasswd server\n",
- packet->data[0]));
- return KRB5KRB_AP_ERR_MODIFIED;
- }
-
- if (RSVAL(p, 0) != packet->length) {
- DEBUG(1,("Bad packet length (%d/%d) from kpasswd server\n",
- RSVAL(p, 0), packet->length));
- return KRB5KRB_AP_ERR_MODIFIED;
- }
-
- p += 2;
-
- vnum = RSVAL(p, 0); p += 2;
-
- if (vnum != KRB5_KPASSWD_VERS_SETPW && 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 >= 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 = (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 = clearresult.data;
-
- res_code = RSVAL(p, 0);
-
- free(clearresult.data);
-
- if ((res_code < KRB5_KPASSWD_SUCCESS) ||
- (res_code >= KRB5_KPASSWD_ACCESSDENIED)) {
- return KRB5KRB_AP_ERR_MODIFIED;
- }
-
- return 0;
-}
-
-ADS_STATUS krb5_set_password(const char *kdc_host, const char *princ, const char *newpw,
- int time_offset)
-{
- krb5_context context;
- krb5_auth_context auth_context = NULL;
- krb5_principal principal;
- char *princ_name;
- char *realm;
- krb5_creds creds, *credsp;
- krb5_ccache ccache;
- krb5_data ap_req, chpw_req, chpw_rep;
- int ret, sock, addr_len;
- struct sockaddr remote_addr, local_addr;
- krb5_address local_kaddr, remote_kaddr;
-
- 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);
- }
-
- ZERO_STRUCT(creds);
-
- realm = strchr(princ, '@');
- realm++;
-
- asprintf(&princ_name, "kadmin/changepw@%s", realm);
- ret = krb5_parse_name(context, princ_name, &creds.server);
- if (ret) {
- krb5_free_context(context);
- DEBUG(1,("Failed to parse kadmin/changepw (%s)\n", error_message(ret)));
- return ADS_ERROR_KRB5(ret);
- }
- free(princ_name);
-
- /* parse the principal we got as a function argument */
- ret = krb5_parse_name(context, princ, &principal);
- if (ret) {
- krb5_free_context(context);
- DEBUG(1,("Failed to parse %s (%s)\n", princ_name, error_message(ret)));
- return ADS_ERROR_KRB5(ret);
- }
-
- krb5_princ_set_realm(context, creds.server,
- krb5_princ_realm(context, principal));
-
- ret = krb5_cc_get_principal(context, ccache, &creds.client);
- if (ret) {
- 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_free_principal(context, creds.client);
- 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 ... */
- ret = krb5_mk_req_extended(context, &auth_context, AP_OPTS_USE_SUBKEY,
- NULL, credsp, &ap_req);
- if (ret) {
- krb5_free_creds(context, credsp);
- krb5_free_principal(context, creds.client);
- krb5_free_principal(context, principal);
- krb5_free_context(context);
- DEBUG(1,("krb5_mk_req_extended failed (%s)\n", error_message(ret)));
- return ADS_ERROR_KRB5(ret);
- }
-
- sock = open_udp_socket(kdc_host, DEFAULT_KPASSWD_PORT);
- if (sock == -1) {
- int rc = errno;
- free(ap_req.data);
- krb5_free_creds(context, credsp);
- krb5_free_principal(context, creds.client);
- krb5_free_principal(context, principal);
- krb5_free_context(context);
- DEBUG(1,("failed to open kpasswd socket to %s (%s)\n",
- kdc_host, strerror(errno)));
- return ADS_ERROR_SYSTEM(rc);
- }
-
- addr_len = sizeof(remote_addr);
- getpeername(sock, &remote_addr, &addr_len);
- addr_len = sizeof(local_addr);
- getsockname(sock, &local_addr, &addr_len);
-
- remote_kaddr.addrtype = ADDRTYPE_INET;
- remote_kaddr.length = sizeof(((struct sockaddr_in *)&remote_addr)->sin_addr);
- remote_kaddr.contents = (char *)&(((struct sockaddr_in *)&remote_addr)->sin_addr);
- local_kaddr.addrtype = ADDRTYPE_INET;
- local_kaddr.length = sizeof(((struct sockaddr_in *)&local_addr)->sin_addr);
- local_kaddr.contents = (char *)&(((struct sockaddr_in *)&local_addr)->sin_addr);
-
- ret = krb5_auth_con_setaddrs(context, auth_context, &local_kaddr, NULL);
- if (ret) {
- close(sock);
- free(ap_req.data);
- krb5_free_creds(context, credsp);
- krb5_free_principal(context, creds.client);
- krb5_free_principal(context, principal);
- krb5_free_context(context);
- DEBUG(1,("krb5_auth_con_setaddrs failed (%s)\n", error_message(ret)));
- return ADS_ERROR_KRB5(ret);
- }
-
- ret = build_setpw_request(context, auth_context, &ap_req,
- princ, newpw, &chpw_req);
- if (ret) {
- close(sock);
- free(ap_req.data);
- krb5_free_creds(context, credsp);
- krb5_free_principal(context, creds.client);
- krb5_free_principal(context, principal);
- krb5_free_context(context);
- DEBUG(1,("build_setpw_request failed (%s)\n", error_message(ret)));
- return ADS_ERROR_KRB5(ret);
- }
-
- if (write(sock, chpw_req.data, chpw_req.length) != chpw_req.length) {
- close(sock);
- free(chpw_req.data);
- free(ap_req.data);
- krb5_free_creds(context, credsp);
- krb5_free_principal(context, creds.client);
- krb5_free_principal(context, principal);
- krb5_free_context(context);
- DEBUG(1,("send of chpw failed (%s)\n", strerror(errno)));
- return ADS_ERROR_SYSTEM(errno);
- }
-
- free(chpw_req.data);
-
- chpw_rep.length = 1500;
- chpw_rep.data = (char *) malloc(chpw_rep.length);
-
- ret = read(sock, chpw_rep.data, chpw_rep.length);
- if (ret < 0) {
- close(sock);
- free(chpw_rep.data);
- free(ap_req.data);
- krb5_free_creds(context, credsp);
- krb5_free_principal(context, creds.client);
- krb5_free_principal(context, principal);
- krb5_free_context(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) {
- free(chpw_rep.data);
- free(ap_req.data);
- krb5_free_creds(context, credsp);
- krb5_free_principal(context, creds.client);
- krb5_free_principal(context, principal);
- krb5_free_context(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, auth_context, &chpw_rep);
- free(chpw_rep.data);
-
- if (ret) {
- free(ap_req.data);
- krb5_free_creds(context, credsp);
- krb5_free_principal(context, creds.client);
- krb5_free_principal(context, principal);
- krb5_free_context(context);
- DEBUG(1,("parse_setpw_reply failed (%s)\n",
- error_message(ret)));
- return ADS_ERROR_KRB5(ret);
- }
-
- free(ap_req.data);
- krb5_free_creds(context, credsp);
- krb5_free_principal(context, creds.client);
- krb5_free_principal(context, principal);
- krb5_free_context(context);
-
- return ADS_SUCCESS;
-}
-
-
-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))) {
- DEBUG(1,("Failed kinit for principal %s (%s)\n", auth_principal, error_message(ret)));
- return ADS_ERROR_KRB5(ret);
- }
-
- return krb5_set_password(kpasswd_server, target_principal, new_password, time_offset);
-}
-
-
-/**
- * Set the machine account password
- * @param ads connection to ads server
- * @param hostname machine whose password is being set
- * @param password new password
- * @return status of password change
- **/
-ADS_STATUS ads_set_machine_password(ADS_STRUCT *ads,
- const char *hostname,
- const char *password)
-{
- ADS_STATUS status;
- char *host = strdup(hostname);
- char *principal;
-
- strlower(host);
-
- /*
- we need to use the '$' form of the name here, as otherwise the
- server might end up setting the password for a user instead
- */
- asprintf(&principal, "%s$@%s", host, ads->auth.realm);
-
- status = krb5_set_password(ads->auth.kdc_server, principal, password, ads->auth.time_offset);
-
- free(host);
- free(principal);
-
- return status;
-}
-
-#endif
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