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-rw-r--r--crypto/heimdal/lib/auth/sia/sia.c672
1 files changed, 672 insertions, 0 deletions
diff --git a/crypto/heimdal/lib/auth/sia/sia.c b/crypto/heimdal/lib/auth/sia/sia.c
new file mode 100644
index 0000000..01e2ac0
--- /dev/null
+++ b/crypto/heimdal/lib/auth/sia/sia.c
@@ -0,0 +1,672 @@
+/*
+ * Copyright (c) 1995-1999 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden).
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the Institute nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include "sia_locl.h"
+
+RCSID("$Id: sia.c,v 1.33 1999/12/20 09:46:44 joda Exp $");
+
+int
+siad_init(void)
+{
+ return SIADSUCCESS;
+}
+
+int
+siad_chk_invoker(void)
+{
+ SIA_DEBUG(("DEBUG", "siad_chk_invoker"));
+ return SIADFAIL;
+}
+
+int
+siad_ses_init(SIAENTITY *entity, int pkgind)
+{
+ struct state *s = malloc(sizeof(*s));
+ SIA_DEBUG(("DEBUG", "siad_ses_init"));
+ if(s == NULL)
+ return SIADFAIL;
+ memset(s, 0, sizeof(*s));
+#ifdef SIA_KRB5
+ krb5_init_context(&s->context);
+#endif
+ entity->mech[pkgind] = (int*)s;
+ return SIADSUCCESS;
+}
+
+static int
+setup_name(SIAENTITY *e, prompt_t *p)
+{
+ SIA_DEBUG(("DEBUG", "setup_name"));
+ e->name = malloc(SIANAMEMIN + 1);
+ if(e->name == NULL){
+ SIA_DEBUG(("DEBUG", "failed to malloc %u bytes", SIANAMEMIN+1));
+ return SIADFAIL;
+ }
+ p->prompt = (unsigned char*)"login: ";
+ p->result = (unsigned char*)e->name;
+ p->min_result_length = 1;
+ p->max_result_length = SIANAMEMIN;
+ p->control_flags = 0;
+ return SIADSUCCESS;
+}
+
+static int
+setup_password(SIAENTITY *e, prompt_t *p)
+{
+ SIA_DEBUG(("DEBUG", "setup_password"));
+ e->password = malloc(SIAMXPASSWORD + 1);
+ if(e->password == NULL){
+ SIA_DEBUG(("DEBUG", "failed to malloc %u bytes", SIAMXPASSWORD+1));
+ return SIADFAIL;
+ }
+ p->prompt = (unsigned char*)"Password: ";
+ p->result = (unsigned char*)e->password;
+ p->min_result_length = 0;
+ p->max_result_length = SIAMXPASSWORD;
+ p->control_flags = SIARESINVIS;
+ return SIADSUCCESS;
+}
+
+
+static int
+doauth(SIAENTITY *entity, int pkgind, char *name)
+{
+ struct passwd pw, *pwd;
+ char pwbuf[1024];
+ struct state *s = (struct state*)entity->mech[pkgind];
+#ifdef SIA_KRB5
+ krb5_realm *realms, *r;
+ krb5_principal principal;
+ krb5_ccache ccache;
+ krb5_error_code ret;
+#endif
+#ifdef SIA_KRB4
+ char realm[REALM_SZ];
+ char *toname, *toinst;
+ int ret;
+ struct passwd fpw, *fpwd;
+ char fpwbuf[1024];
+ int secure;
+#endif
+
+ if(getpwnam_r(name, &pw, pwbuf, sizeof(pwbuf), &pwd) != 0){
+ SIA_DEBUG(("DEBUG", "failed to getpwnam(%s)", name));
+ return SIADFAIL;
+ }
+
+#ifdef SIA_KRB5
+ ret = krb5_get_default_realms(s->context, &realms);
+
+ for (r = realms; *r != NULL; ++r) {
+ krb5_make_principal (s->context, &principal, *r, entity->name, NULL);
+
+ if(krb5_kuserok(s->context, principal, entity->name))
+ break;
+ }
+ krb5_free_host_realm (s->context, realms);
+ if (*r == NULL)
+ return SIADFAIL;
+
+ sprintf(s->ticket, "FILE:/tmp/krb5_cc%d_%d", pwd->pw_uid, getpid());
+ ret = krb5_cc_resolve(s->context, s->ticket, &ccache);
+ if(ret)
+ return SIADFAIL;
+#endif
+
+#ifdef SIA_KRB4
+ snprintf(s->ticket, sizeof(s->ticket),
+ "%s%u_%u", TKT_ROOT, (unsigned)pwd->pw_uid, (unsigned)getpid());
+ krb_get_lrealm(realm, 1);
+ toname = name;
+ toinst = "";
+ if(entity->authtype == SIA_A_SUAUTH){
+ uid_t ouid;
+#ifdef HAVE_SIAENTITY_OUID
+ ouid = entity->ouid;
+#else
+ ouid = getuid();
+#endif
+ if(getpwuid_r(ouid, &fpw, fpwbuf, sizeof(fpwbuf), &fpwd) != 0){
+ SIA_DEBUG(("DEBUG", "failed to getpwuid(%u)", ouid));
+ return SIADFAIL;
+ }
+ snprintf(s->ticket, sizeof(s->ticket), "%s_%s_to_%s_%d",
+ TKT_ROOT, fpwd->pw_name, pwd->pw_name, getpid());
+ if(strcmp(pwd->pw_name, "root") == 0){
+ toname = fpwd->pw_name;
+ toinst = pwd->pw_name;
+ }
+ }
+ if(entity->authtype == SIA_A_REAUTH)
+ snprintf(s->ticket, sizeof(s->ticket), "%s", tkt_string());
+
+ krb_set_tkt_string(s->ticket);
+
+ setuid(0); /* XXX fix for fix in tf_util.c */
+ if(krb_kuserok(toname, toinst, realm, name)){
+ SIA_DEBUG(("DEBUG", "%s.%s@%s is not allowed to login as %s",
+ toname, toinst, realm, name));
+ return SIADFAIL;
+ }
+#endif
+#ifdef SIA_KRB5
+ ret = krb5_verify_user_lrealm(s->context, principal, ccache,
+ entity->password, 1, NULL);
+ if(ret){
+ /* if this is most likely a local user (such as
+ root), just silently return failure when the
+ principal doesn't exist */
+ if(ret != KRB5KDC_ERR_C_PRINCIPAL_UNKNOWN &&
+ ret != KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN)
+ SIALOG("WARNING", "krb5_verify_user(%s): %s",
+ entity->name, error_message(ret));
+ return SIADFAIL;
+ }
+#endif
+#ifdef SIA_KRB4
+ if (getuid () == 0)
+ secure = KRB_VERIFY_SECURE;
+ else
+ secure = KRB_VERIFY_NOT_SECURE;
+
+ ret = krb_verify_user(toname, toinst, realm,
+ entity->password, secure, NULL);
+ if(ret){
+ SIA_DEBUG(("DEBUG", "krb_verify_user: %s", krb_get_err_text(ret)));
+ if(ret != KDC_PR_UNKNOWN)
+ /* since this is most likely a local user (such as
+ root), just silently return failure when the
+ principal doesn't exist */
+ SIALOG("WARNING", "krb_verify_user(%s.%s): %s",
+ toname, toinst, krb_get_err_text(ret));
+ return SIADFAIL;
+ }
+#endif
+ if(sia_make_entity_pwd(pwd, entity) == SIAFAIL)
+ return SIADFAIL;
+ s->valid = 1;
+ return SIADSUCCESS;
+}
+
+
+static int
+common_auth(sia_collect_func_t *collect,
+ SIAENTITY *entity,
+ int siastat,
+ int pkgind)
+{
+ prompt_t prompts[2], *pr;
+ char *name;
+
+ SIA_DEBUG(("DEBUG", "common_auth"));
+ if((siastat == SIADSUCCESS) && (geteuid() == 0))
+ return SIADSUCCESS;
+ if(entity == NULL) {
+ SIA_DEBUG(("DEBUG", "entity == NULL"));
+ return SIADFAIL | SIADSTOP;
+ }
+ name = entity->name;
+ if(entity->acctname)
+ name = entity->acctname;
+
+ if((collect != NULL) && entity->colinput) {
+ int num;
+ pr = prompts;
+ if(name == NULL){
+ if(setup_name(entity, pr) != SIADSUCCESS)
+ return SIADFAIL;
+ pr++;
+ }
+ if(entity->password == NULL){
+ if(setup_password(entity, pr) != SIADSUCCESS)
+ return SIADFAIL;
+ pr++;
+ }
+ num = pr - prompts;
+ if(num == 1){
+ if((*collect)(240, SIAONELINER, (unsigned char*)"", num,
+ prompts) != SIACOLSUCCESS){
+ SIA_DEBUG(("DEBUG", "collect failed"));
+ return SIADFAIL | SIADSTOP;
+ }
+ } else if(num > 0){
+ if((*collect)(0, SIAFORM, (unsigned char*)"", num,
+ prompts) != SIACOLSUCCESS){
+ SIA_DEBUG(("DEBUG", "collect failed"));
+ return SIADFAIL | SIADSTOP;
+ }
+ }
+ }
+ if(name == NULL)
+ name = entity->name;
+ if(name == NULL || name[0] == '\0'){
+ SIA_DEBUG(("DEBUG", "name is null"));
+ return SIADFAIL;
+ }
+
+ if(entity->password == NULL || strlen(entity->password) > SIAMXPASSWORD){
+ SIA_DEBUG(("DEBUG", "entity->password is null"));
+ return SIADFAIL;
+ }
+
+ return doauth(entity, pkgind, name);
+}
+
+
+int
+siad_ses_authent(sia_collect_func_t *collect,
+ SIAENTITY *entity,
+ int siastat,
+ int pkgind)
+{
+ SIA_DEBUG(("DEBUG", "siad_ses_authent"));
+ return common_auth(collect, entity, siastat, pkgind);
+}
+
+int
+siad_ses_estab(sia_collect_func_t *collect,
+ SIAENTITY *entity, int pkgind)
+{
+ SIA_DEBUG(("DEBUG", "siad_ses_estab"));
+ return SIADFAIL;
+}
+
+int
+siad_ses_launch(sia_collect_func_t *collect,
+ SIAENTITY *entity,
+ int pkgind)
+{
+ static char env[MaxPathLen];
+ struct state *s = (struct state*)entity->mech[pkgind];
+ SIA_DEBUG(("DEBUG", "siad_ses_launch"));
+ if(s->valid){
+#ifdef SIA_KRB5
+ chown(s->ticket + sizeof("FILE:") - 1,
+ entity->pwd->pw_uid,
+ entity->pwd->pw_gid);
+ snprintf(env, sizeof(env), "KRB5CCNAME=%s", s->ticket);
+#endif
+#ifdef SIA_KRB4
+ chown(s->ticket, entity->pwd->pw_uid, entity->pwd->pw_gid);
+ snprintf(env, sizeof(env), "KRBTKFILE=%s", s->ticket);
+#endif
+ putenv(env);
+ }
+#ifdef KRB4
+ if (k_hasafs()) {
+ char cell[64];
+ k_setpag();
+ if(k_afs_cell_of_file(entity->pwd->pw_dir, cell, sizeof(cell)) == 0)
+ krb_afslog(cell, 0);
+ krb_afslog_home(0, 0, entity->pwd->pw_dir);
+ }
+#endif
+ return SIADSUCCESS;
+}
+
+int
+siad_ses_release(SIAENTITY *entity, int pkgind)
+{
+ SIA_DEBUG(("DEBUG", "siad_ses_release"));
+ if(entity->mech[pkgind]){
+#ifdef SIA_KRB5
+ struct state *s = (struct state*)entity->mech[pkgind];
+ krb5_free_context(s->context);
+#endif
+ free(entity->mech[pkgind]);
+ }
+ return SIADSUCCESS;
+}
+
+int
+siad_ses_suauthent(sia_collect_func_t *collect,
+ SIAENTITY *entity,
+ int siastat,
+ int pkgind)
+{
+ SIA_DEBUG(("DEBUG", "siad_ses_suauth"));
+ if(geteuid() != 0)
+ return SIADFAIL;
+ if(entity->name == NULL)
+ return SIADFAIL;
+ if(entity->name[0] == '\0') {
+ free(entity->name);
+ entity->name = strdup("root");
+ if (entity->name == NULL)
+ return SIADFAIL;
+ }
+ return common_auth(collect, entity, siastat, pkgind);
+}
+
+int
+siad_ses_reauthent (sia_collect_func_t *collect,
+ SIAENTITY *entity,
+ int siastat,
+ int pkgind)
+{
+ int ret;
+ SIA_DEBUG(("DEBUG", "siad_ses_reauthent"));
+ if(entity == NULL || entity->name == NULL)
+ return SIADFAIL;
+ ret = common_auth(collect, entity, siastat, pkgind);
+ if((ret & SIADSUCCESS)){
+ /* launch isn't (always?) called when doing reauth, so we must
+ duplicate some code here... */
+ struct state *s = (struct state*)entity->mech[pkgind];
+ chown(s->ticket, entity->pwd->pw_uid, entity->pwd->pw_gid);
+#ifdef KRB4
+ if(k_hasafs()) {
+ char cell[64];
+ if(k_afs_cell_of_file(entity->pwd->pw_dir,
+ cell, sizeof(cell)) == 0)
+ krb_afslog(cell, 0);
+ krb_afslog_home(0, 0, entity->pwd->pw_dir);
+ }
+#endif
+ }
+ return ret;
+}
+
+int
+siad_chg_finger (sia_collect_func_t *collect,
+ const char *username,
+ int argc,
+ char *argv[])
+{
+ SIA_DEBUG(("DEBUG", "siad_chg_finger"));
+ return SIADFAIL;
+}
+
+#ifdef SIA_KRB5
+int
+siad_chg_password (sia_collect_func_t *collect,
+ const char *username,
+ int argc,
+ char *argv[])
+{
+ return SIADFAIL;
+}
+#endif
+
+#ifdef SIA_KRB4
+static void
+sia_message(sia_collect_func_t *collect, int rendition,
+ const char *title, const char *message)
+{
+ prompt_t prompt;
+ prompt.prompt = (unsigned char*)message;
+ (*collect)(0, rendition, (unsigned char*)title, 1, &prompt);
+}
+
+static int
+init_change(sia_collect_func_t *collect, krb_principal *princ)
+{
+ prompt_t prompt;
+ char old_pw[MAX_KPW_LEN+1];
+ char *msg;
+ char tktstring[128];
+ int ret;
+
+ SIA_DEBUG(("DEBUG", "init_change"));
+ prompt.prompt = (unsigned char*)"Old password: ";
+ prompt.result = (unsigned char*)old_pw;
+ prompt.min_result_length = 0;
+ prompt.max_result_length = sizeof(old_pw) - 1;
+ prompt.control_flags = SIARESINVIS;
+ asprintf(&msg, "Changing password for %s", krb_unparse_name(princ));
+ if(msg == NULL){
+ SIA_DEBUG(("DEBUG", "out of memory"));
+ return SIADFAIL;
+ }
+ ret = (*collect)(60, SIAONELINER, (unsigned char*)msg, 1, &prompt);
+ free(msg);
+ SIA_DEBUG(("DEBUG", "ret = %d", ret));
+ if(ret != SIACOLSUCCESS)
+ return SIADFAIL;
+ snprintf(tktstring, sizeof(tktstring),
+ "%s_cpw_%u", TKT_ROOT, (unsigned)getpid());
+ krb_set_tkt_string(tktstring);
+
+ ret = krb_get_pw_in_tkt(princ->name, princ->instance, princ->realm,
+ PWSERV_NAME, KADM_SINST, 1, old_pw);
+ if (ret != KSUCCESS) {
+ SIA_DEBUG(("DEBUG", "krb_get_pw_in_tkt: %s", krb_get_err_text(ret)));
+ if (ret == INTK_BADPW)
+ sia_message(collect, SIAWARNING, "", "Incorrect old password.");
+ else
+ sia_message(collect, SIAWARNING, "", "Kerberos error.");
+ memset(old_pw, 0, sizeof(old_pw));
+ return SIADFAIL;
+ }
+ if(chown(tktstring, getuid(), -1) < 0){
+ dest_tkt();
+ return SIADFAIL;
+ }
+ memset(old_pw, 0, sizeof(old_pw));
+ return SIADSUCCESS;
+}
+
+int
+siad_chg_password (sia_collect_func_t *collect,
+ const char *username,
+ int argc,
+ char *argv[])
+{
+ prompt_t prompts[2];
+ krb_principal princ;
+ int ret;
+ char new_pw1[MAX_KPW_LEN+1];
+ char new_pw2[MAX_KPW_LEN+1];
+ static struct et_list *et_list;
+
+ set_progname(argv[0]);
+
+ SIA_DEBUG(("DEBUG", "siad_chg_password"));
+ if(collect == NULL)
+ return SIADFAIL;
+
+ if(username == NULL)
+ username = getlogin();
+
+ ret = krb_parse_name(username, &princ);
+ if(ret)
+ return SIADFAIL;
+ if(princ.realm[0] == '\0')
+ krb_get_lrealm(princ.realm, 1);
+
+ if(et_list == NULL) {
+ initialize_kadm_error_table_r(&et_list);
+ initialize_krb_error_table_r(&et_list);
+ }
+
+ ret = init_change(collect, &princ);
+ if(ret != SIADSUCCESS)
+ return ret;
+
+again:
+ prompts[0].prompt = (unsigned char*)"New password: ";
+ prompts[0].result = (unsigned char*)new_pw1;
+ prompts[0].min_result_length = MIN_KPW_LEN;
+ prompts[0].max_result_length = sizeof(new_pw1) - 1;
+ prompts[0].control_flags = SIARESINVIS;
+ prompts[1].prompt = (unsigned char*)"Verify new password: ";
+ prompts[1].result = (unsigned char*)new_pw2;
+ prompts[1].min_result_length = MIN_KPW_LEN;
+ prompts[1].max_result_length = sizeof(new_pw2) - 1;
+ prompts[1].control_flags = SIARESINVIS;
+ if((*collect)(120, SIAFORM, (unsigned char*)"", 2, prompts) !=
+ SIACOLSUCCESS) {
+ dest_tkt();
+ return SIADFAIL;
+ }
+ if(strcmp(new_pw1, new_pw2) != 0){
+ sia_message(collect, SIAWARNING, "", "Password mismatch.");
+ goto again;
+ }
+ ret = kadm_check_pw(new_pw1);
+ if(ret) {
+ sia_message(collect, SIAWARNING, "", com_right(et_list, ret));
+ goto again;
+ }
+
+ memset(new_pw2, 0, sizeof(new_pw2));
+ ret = kadm_init_link (PWSERV_NAME, KRB_MASTER, princ.realm);
+ if (ret != KADM_SUCCESS)
+ sia_message(collect, SIAWARNING, "Error initing kadmin connection",
+ com_right(et_list, ret));
+ else {
+ des_cblock newkey;
+ char *pw_msg; /* message from server */
+
+ des_string_to_key(new_pw1, &newkey);
+ ret = kadm_change_pw_plain((unsigned char*)&newkey, new_pw1, &pw_msg);
+ memset(newkey, 0, sizeof(newkey));
+
+ if (ret == KADM_INSECURE_PW)
+ sia_message(collect, SIAWARNING, "Insecure password", pw_msg);
+ else if (ret != KADM_SUCCESS)
+ sia_message(collect, SIAWARNING, "Error changing password",
+ com_right(et_list, ret));
+ }
+ memset(new_pw1, 0, sizeof(new_pw1));
+
+ if (ret != KADM_SUCCESS)
+ sia_message(collect, SIAWARNING, "", "Password NOT changed.");
+ else
+ sia_message(collect, SIAINFO, "", "Password changed.");
+
+ dest_tkt();
+ if(ret)
+ return SIADFAIL;
+ return SIADSUCCESS;
+}
+#endif
+
+int
+siad_chg_shell (sia_collect_func_t *collect,
+ const char *username,
+ int argc,
+ char *argv[])
+{
+ return SIADFAIL;
+}
+
+int
+siad_getpwent(struct passwd *result,
+ char *buf,
+ int bufsize,
+ struct sia_context *context)
+{
+ return SIADFAIL;
+}
+
+int
+siad_getpwuid (uid_t uid,
+ struct passwd *result,
+ char *buf,
+ int bufsize,
+ struct sia_context *context)
+{
+ return SIADFAIL;
+}
+
+int
+siad_getpwnam (const char *name,
+ struct passwd *result,
+ char *buf,
+ int bufsize,
+ struct sia_context *context)
+{
+ return SIADFAIL;
+}
+
+int
+siad_setpwent (struct sia_context *context)
+{
+ return SIADFAIL;
+}
+
+int
+siad_endpwent (struct sia_context *context)
+{
+ return SIADFAIL;
+}
+
+int
+siad_getgrent(struct group *result,
+ char *buf,
+ int bufsize,
+ struct sia_context *context)
+{
+ return SIADFAIL;
+}
+
+int
+siad_getgrgid (gid_t gid,
+ struct group *result,
+ char *buf,
+ int bufsize,
+ struct sia_context *context)
+{
+ return SIADFAIL;
+}
+
+int
+siad_getgrnam (const char *name,
+ struct group *result,
+ char *buf,
+ int bufsize,
+ struct sia_context *context)
+{
+ return SIADFAIL;
+}
+
+int
+siad_setgrent (struct sia_context *context)
+{
+ return SIADFAIL;
+}
+
+int
+siad_endgrent (struct sia_context *context)
+{
+ return SIADFAIL;
+}
+
+int
+siad_chk_user (const char *logname, int checkflag)
+{
+ if(checkflag != CHGPASSWD)
+ return SIADFAIL;
+ return SIADSUCCESS;
+}
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