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-rw-r--r--ipa-client/ipa-getkeytab.c836
1 files changed, 836 insertions, 0 deletions
diff --git a/ipa-client/ipa-getkeytab.c b/ipa-client/ipa-getkeytab.c
new file mode 100644
index 00000000..fbeb547a
--- /dev/null
+++ b/ipa-client/ipa-getkeytab.c
@@ -0,0 +1,836 @@
+/* Authors: Simo Sorce <ssorce@redhat.com>
+ *
+ * Copyright (C) 2007 Red Hat
+ * see file 'COPYING' for use and warranty information
+ *
+ * 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; version 2 only
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#define _GNU_SOURCE
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <sys/time.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <time.h>
+#define KRB5_PRIVATE 1
+#include <krb5.h>
+#ifdef WITH_MOZLDAP
+#include <mozldap/ldap.h>
+#else
+#include <ldap.h>
+#endif
+#include <sasl/sasl.h>
+#include <popt.h>
+
+/* Salt types */
+#define NO_SALT -1
+#define KRB5_KDB_SALTTYPE_NORMAL 0
+#define KRB5_KDB_SALTTYPE_V4 1
+#define KRB5_KDB_SALTTYPE_NOREALM 2
+#define KRB5_KDB_SALTTYPE_ONLYREALM 3
+#define KRB5_KDB_SALTTYPE_SPECIAL 4
+#define KRB5_KDB_SALTTYPE_AFS3 5
+
+#define KEYTAB_SET_OID "2.16.840.1.113730.3.8.3.1"
+#define KEYTAB_RET_OID "2.16.840.1.113730.3.8.3.2"
+
+struct krb_key_salt {
+ krb5_enctype enctype;
+ krb5_int32 salttype;
+ krb5_keyblock key;
+ krb5_data salt;
+};
+
+struct keys_container {
+ krb5_int32 nkeys;
+ struct krb_key_salt *ksdata;
+};
+
+static int ldap_sasl_interact(LDAP *ld, unsigned flags, void *priv_data, void *sit)
+{
+ sasl_interact_t *in = NULL;
+ int ret = LDAP_OTHER;
+ krb5_principal princ = (krb5_principal)priv_data;
+
+ if (!ld) return LDAP_PARAM_ERROR;
+
+ for (in = sit; in && in->id != SASL_CB_LIST_END; in++) {
+ switch(in->id) {
+ case SASL_CB_USER:
+ in->result = princ->data[0].data;
+ in->len = princ->data[0].length;
+ ret = LDAP_SUCCESS;
+ break;
+ case SASL_CB_GETREALM:
+ in->result = princ->realm.data;
+ in->len = princ->realm.length;
+ ret = LDAP_SUCCESS;
+ break;
+ default:
+ in->result = NULL;
+ in->len = 0;
+ ret = LDAP_OTHER;
+ }
+ }
+ return ret;
+}
+
+static void free_keys_contents(krb5_context krbctx, struct keys_container *keys)
+{
+ struct krb_key_salt *ksdata;
+ int i;
+
+ ksdata = keys->ksdata;
+ for (i = 0; i < keys->nkeys; i++) {
+ krb5_free_keyblock_contents(krbctx, &ksdata[i].key);
+ krb5_free_data_contents(krbctx, &ksdata[i].salt);
+ }
+ free(ksdata);
+
+ keys->ksdata = NULL;
+ keys->nkeys = 0;
+}
+
+/* Determines Encryption and Salt types,
+ * allocates key_salt data storage,
+ * filters out equivalent encodings,
+ * returns 0 if no enctypes available, >0 if enctypes are available */
+static int prep_ksdata(krb5_context krbctx, const char *str,
+ struct keys_container *keys)
+{
+ struct krb_key_salt *ksdata;
+ krb5_error_code krberr;
+ int n, i, j, nkeys;
+
+ if (str == NULL) {
+ krb5_enctype *ktypes;
+
+ krberr = krb5_get_permitted_enctypes(krbctx, &ktypes);
+ if (krberr) {
+ fprintf(stderr, "No system preferred enctypes ?!\n");
+ return 0;
+ }
+
+ for (n = 0; ktypes[n]; n++) /* count */ ;
+
+ ksdata = calloc(n + 1, sizeof(struct krb_key_salt));
+ if (NULL == ksdata) {
+ fprintf(stderr, "Out of memory!?\n");
+ return 0;
+ }
+
+ for (i = 0; i < n; i++) {
+ ksdata[i].enctype = ktypes[i];
+ ksdata[i].salttype = KRB5_KDB_SALTTYPE_NORMAL;
+ }
+
+ krb5_free_ktypes(krbctx, ktypes);
+
+ nkeys = i;
+
+ } else {
+ char *tmp, *t, *p, *q;
+
+ t = tmp = strdup(str);
+ if (!tmp) {
+ fprintf(stderr, "Out of memory\n");
+ return 0;
+ }
+
+ /* count */
+ n = 0;
+ while ((p = strchr(t, ','))) {
+ t = p+1;
+ n++;
+ }
+ n++; /* count the last one that is 0 terminated instead */
+
+ /* at the end we will have at most n entries + 1 terminating */
+ ksdata = calloc(n + 1, sizeof(struct krb_key_salt));
+ if (!ksdata) {
+ fprintf(stderr, "Out of memory\n");
+ return 0;
+ }
+
+ for (i = 0, j = 0, t = tmp; i < n; i++) {
+
+ p = strchr(t, ',');
+ if (p) *p = '\0';
+
+ q = strchr(t, ':');
+ if (q) *q++ = '\0';
+
+ krberr = krb5_string_to_enctype(t, &ksdata[j].enctype);
+ if (krberr != 0) {
+ fprintf(stderr,
+ "Warning unrecognized encryption type: [%s]\n", t);
+ t = p+1;
+ continue;
+ }
+ t = p+1;
+
+ if (!q) {
+ ksdata[j].salttype = KRB5_KDB_SALTTYPE_NORMAL;
+ j++;
+ continue;
+ }
+
+ krberr = krb5_string_to_salttype(q, &ksdata[j].salttype);
+ if (krberr != 0) {
+ fprintf(stderr, "Warning unrecognized salt type: [%s]\n", q);
+ continue;
+ }
+
+ j++;
+ }
+
+ nkeys = j;
+
+ free(tmp);
+ }
+
+ /* Check we don't already have a key with a similar encoding,
+ * it would just produce redundant data and this is what the
+ * MIT code do anyway */
+
+ for (i = 0, n = 0; i < nkeys; i++ ) {
+ int similar = 0;
+
+ for (j = 0; j < i; j++) {
+ krberr = krb5_c_enctype_compare(krbctx,
+ ksdata[j].enctype,
+ ksdata[i].enctype,
+ &similar);
+ if (krberr) {
+ free_keys_contents(krbctx, keys);
+ fprintf(stderr, "Enctype comparison failed!\n");
+ return 0;
+ }
+ if (similar &&
+ (ksdata[j].salttype == ksdata[i].salttype)) {
+ break;
+ }
+ }
+ if (j < i) {
+ /* redundant encoding, remove it, and shift others */
+ int x;
+ for (x = i; x < nkeys-1; x++) {
+ ksdata[x].enctype = ksdata[x+1].enctype;
+ ksdata[x].salttype = ksdata[x+1].salttype;
+ }
+ continue;
+ }
+ /* count only confirmed enc/salt tuples */
+ n++;
+ }
+
+ keys->nkeys = n;
+ keys->ksdata = ksdata;
+
+ return n;
+}
+
+static int create_keys(krb5_context krbctx,
+ krb5_principal princ,
+ char *password,
+ const char *enctypes_string,
+ struct keys_container *keys)
+{
+ struct krb_key_salt *ksdata;
+ krb5_error_code krberr;
+ krb5_data key_password;
+ krb5_data *realm;
+ int i, j, nkeys;
+ int ret;
+
+ ret = prep_ksdata(krbctx, enctypes_string, keys);
+ if (ret == 0) return 0;
+
+ ksdata = keys->ksdata;
+ nkeys = keys->nkeys;
+
+ if (password) {
+ key_password.data = password;
+ key_password.length = strlen(password);
+
+ realm = krb5_princ_realm(krbctx, princ);
+ }
+
+ for (i = 0; i < nkeys; i++) {
+ krb5_data *salt;
+
+ if (!password) {
+ /* cool, random keys */
+ krberr = krb5_c_make_random_key(krbctx,
+ ksdata[i].enctype,
+ &ksdata[i].key);
+ if (krberr) {
+ fprintf(stderr, "Failed to create random key!\n");
+ return 0;
+ }
+ /* set the salt to NO_SALT as the key was random */
+ ksdata[i].salttype = NO_SALT;
+ continue;
+ }
+
+ /* Make keys using password and required salt */
+ switch (ksdata[i].salttype) {
+ case KRB5_KDB_SALTTYPE_ONLYREALM:
+ krberr = krb5_copy_data(krbctx, realm, &salt);
+ if (krberr) {
+ fprintf(stderr, "Failed to create key!\n");
+ return 0;
+ }
+
+ ksdata[i].salt.length = salt->length;
+ ksdata[i].salt.data = malloc(salt->length);
+ if (!ksdata[i].salt.data) {
+ fprintf(stderr, "Out of memory!\n");
+ return 0;
+ }
+ memcpy(ksdata[i].salt.data, salt->data, salt->length);
+ krb5_free_data(krbctx, salt);
+ break;
+
+ case KRB5_KDB_SALTTYPE_NOREALM:
+ krberr = krb5_principal2salt_norealm(krbctx, princ, &ksdata[i].salt);
+ if (krberr) {
+ fprintf(stderr, "Failed to create key!\n");
+ return 0;
+ }
+ break;
+
+ case KRB5_KDB_SALTTYPE_NORMAL:
+ krberr = krb5_principal2salt(krbctx, princ, &ksdata[i].salt);
+ if (krberr) {
+ fprintf(stderr, "Failed to create key!\n");
+ return 0;
+ }
+ break;
+
+ /* no KRB5_KDB_SALTTYPE_V4, we do not support krb v4 */
+
+ case KRB5_KDB_SALTTYPE_AFS3:
+ /* Comment from MIT sources:
+ * * Why do we do this? Well, the afs_mit_string_to_key
+ * * needs to use strlen, and the realm is not NULL
+ * * terminated....
+ */
+ ksdata[i].salt.data = (char *)malloc(realm->length + 1);
+ if (NULL == ksdata[i].salt.data) {
+ fprintf(stderr, "Out of memory!\n");
+ return 0;
+ }
+ memcpy((char *)ksdata[i].salt.data,
+ (char *)realm->data, realm->length);
+ ksdata[i].salt.data[realm->length] = '\0';
+ /* AFS uses a special length (UGLY) */
+ ksdata[i].salt.length = SALT_TYPE_AFS_LENGTH;
+ break;
+
+ default:
+ fprintf(stderr, "Bad or unsupported salt type (%d)!\n",
+ ksdata[i].salttype);
+ return 0;
+ }
+
+ krberr = krb5_c_string_to_key(krbctx,
+ ksdata[i].enctype,
+ &key_password,
+ &ksdata[i].salt,
+ &ksdata[i].key);
+ if (krberr) {
+ fprintf(stderr, "Failed to create key!\n");
+ return 0;
+ }
+
+ /* set back salt length to real value if AFS3 */
+ if (ksdata[i].salttype == KRB5_KDB_SALTTYPE_AFS3) {
+ ksdata[i].salt.length = realm->length;
+ }
+ }
+
+ return nkeys;
+}
+
+static struct berval *create_key_control(struct keys_container *keys,
+ const char *principalName)
+{
+ struct krb_key_salt *ksdata;
+ struct berval *bval;
+ BerElement *be;
+ int ret, i;
+
+ be = ber_alloc_t(LBER_USE_DER);
+ if (!be) {
+ return NULL;
+ }
+
+ ret = ber_printf(be, "{s{", principalName);
+ if (ret == -1) {
+ ber_free(be, 1);
+ return NULL;
+ }
+
+ ksdata = keys->ksdata;
+ for (i = 0; i < keys->nkeys; i++) {
+
+ /* we set only the EncryptionKey and salt, no s2kparams */
+
+ ret = ber_printf(be, "{t[{t[i]t[o]}]",
+ (ber_tag_t)(LBER_CONSTRUCTED | LBER_CLASS_CONTEXT | 0),
+ (ber_tag_t)(LBER_CONSTRUCTED | LBER_CLASS_CONTEXT | 0),
+ (ber_int_t)ksdata[i].enctype,
+ (ber_tag_t)(LBER_CONSTRUCTED | LBER_CLASS_CONTEXT | 1),
+ (char *)ksdata[i].key.contents, (ber_len_t)ksdata[i].key.length);
+
+ if (ret == -1) {
+ ber_free(be, 1);
+ return NULL;
+ }
+
+ if (ksdata[i].salttype == NO_SALT) {
+ ret = ber_printf(be, "}");
+ continue;
+ }
+
+ /* we have to pass a salt structure */
+ ret = ber_printf(be, "t[{t[i]t[o]}]}",
+ (ber_tag_t)(LBER_CONSTRUCTED | LBER_CLASS_CONTEXT | 1),
+ (ber_tag_t)(LBER_CONSTRUCTED | LBER_CLASS_CONTEXT | 0),
+ (ber_int_t)ksdata[i].salttype,
+ (ber_tag_t)(LBER_CONSTRUCTED | LBER_CLASS_CONTEXT | 1),
+ (char *)ksdata[i].salt.data, (ber_len_t)ksdata[i].salt.length);
+
+ if (ret == -1) {
+ ber_free(be, 1);
+ return NULL;
+ }
+ }
+
+ ret = ber_printf(be, "}}");
+ if (ret == -1) {
+ ber_free(be, 1);
+ return NULL;
+ }
+
+ ret = ber_flatten(be, &bval);
+ if (ret == -1) {
+ ber_free(be, 1);
+ return NULL;
+ }
+
+ ber_free(be, 1);
+ return bval;
+}
+
+int filter_keys(krb5_context krbctx, struct keys_container *keys,
+ ber_int_t *enctypes)
+{
+ struct krb_key_salt *ksdata;
+ int i, j, n;
+
+ n = keys->nkeys;
+ ksdata = keys->ksdata;
+ for (i = 0; i < n; i++) {
+ if (ksdata[i].enctype == enctypes[i]) continue;
+ if (enctypes[i] == 0) {
+ /* remove unsupported one */
+ krb5_free_keyblock_contents(krbctx, &ksdata[i].key);
+ krb5_free_data_contents(krbctx, &ksdata[i].salt);
+ for (j = i; j < n-1; j++) {
+ keys[j] = keys[j + 1];
+ }
+ n--;
+ /* new key has been moved to this position, make sure
+ * we do not skip it, by neutralizing next i increment */
+ i--;
+ }
+ }
+
+ if (n == 0) {
+ fprintf(stderr, "No keys accepted by KDC\n");
+ return 0;
+ }
+
+ keys->nkeys = n;
+ return n;
+}
+
+static int ldap_set_keytab(krb5_context krbctx,
+ const char *servername,
+ const char *principal_name,
+ krb5_principal princ,
+ struct keys_container *keys)
+{
+ int version;
+ LDAP *ld = NULL;
+ BerElement *sctrl = NULL;
+ struct berval *control = NULL;
+ char *retoid = NULL;
+ struct berval *retdata = NULL;
+ struct timeval tv;
+ LDAPMessage *res = NULL;
+ LDAPControl **srvctrl = NULL;
+ LDAPControl *pprc = NULL;
+ char *err = NULL;
+ int msgid;
+ int ret, rc;
+ int kvno, i;
+ ber_tag_t rtag;
+ ber_int_t *encs = NULL;
+
+ /* cant' return more than nkeys, sometimes less */
+ encs = calloc(keys->nkeys + 1, sizeof(ber_int_t));
+ if (!encs) {
+ fprintf(stderr, "Out of Memory!\n");
+ return 0;
+ }
+
+ /* build password change control */
+ control = create_key_control(keys, principal_name);
+ if (!control) {
+ fprintf(stderr, "Failed to create control!\n");
+ goto error_out;
+ }
+
+ /* TODO: support referrals ? */
+ ld = ldap_init(servername, 389);
+ if(ld == NULL) {
+ fprintf(stderr, "Unable to initialize ldap library!\n");
+ goto error_out;
+ }
+
+ version = LDAP_VERSION3;
+ ret = ldap_set_option(ld, LDAP_OPT_PROTOCOL_VERSION, &version);
+ if (ret != LDAP_SUCCESS) {
+ fprintf(stderr, "Unable to set ldap options!\n");
+ goto error_out;
+ }
+
+ ret = ldap_sasl_interactive_bind_s(ld,
+ NULL, "GSSAPI",
+ NULL, NULL,
+ LDAP_SASL_QUIET,
+ ldap_sasl_interact, princ);
+ if (ret != LDAP_SUCCESS) {
+ fprintf(stderr, "SASL Bind failed!\n");
+ goto error_out;
+ }
+
+ /* find base dn */
+ /* TODO: address the case where we have multiple naming contexts */
+ tv.tv_sec = 10;
+ tv.tv_usec = 0;
+
+ /* perform password change */
+ ret = ldap_extended_operation(ld,
+ KEYTAB_SET_OID,
+ control, NULL, NULL,
+ &msgid);
+ if (ret != LDAP_SUCCESS) {
+ fprintf(stderr, "Operation failed! %s\n", ldap_err2string(ret));
+ goto error_out;
+ }
+
+ ber_bvfree(control);
+ control = NULL;
+
+ tv.tv_sec = 10;
+ tv.tv_usec = 0;
+
+ ret = ldap_result(ld, msgid, 1, &tv, &res);
+ if (ret == -1) {
+ fprintf(stderr, "Operation failed! %s\n", ldap_err2string(ret));
+ goto error_out;
+ }
+
+ ret = ldap_parse_extended_result(ld, res, &retoid, &retdata, 0);
+ if(ret != LDAP_SUCCESS) {
+ fprintf(stderr, "Operation failed! %s\n", ldap_err2string(ret));
+ goto error_out;
+ }
+
+ ret = ldap_parse_result(ld, res, &rc, NULL, &err, NULL, &srvctrl, 0);
+ if(ret != LDAP_SUCCESS || rc != LDAP_SUCCESS) {
+ fprintf(stderr, "Operation failed! %s\n", err?err:ldap_err2string(ret));
+ goto error_out;
+ }
+
+ if (!srvctrl) {
+ fprintf(stderr, "Missing reply control!\n");
+ goto error_out;
+ }
+
+ for (i = 0; srvctrl[i]; i++) {
+ if (0 == strcmp(srvctrl[i]->ldctl_oid, KEYTAB_RET_OID)) {
+ pprc = srvctrl[i];
+ }
+ }
+ if (!pprc) {
+ fprintf(stderr, "Missing reply control!\n");
+ goto error_out;
+ }
+
+ sctrl = ber_init(&pprc->ldctl_value);
+
+ if (!sctrl) {
+ fprintf(stderr, "ber_init() failed, Invalid control ?!\n");
+ goto error_out;
+ }
+
+ /* Format of response
+ *
+ * KeytabGetRequest ::= SEQUENCE {
+ * new_kvno Int32
+ * SEQUENCE OF KeyTypes
+ * }
+ *
+ * * List of accepted enctypes *
+ * KeyTypes ::= SEQUENCE {
+ * enctype Int32
+ * }
+ */
+
+ rtag = ber_scanf(sctrl, "{i{", &kvno);
+ if (rtag == LBER_ERROR) {
+ fprintf(stderr, "ber_scanf() failed, Invalid control ?!\n");
+ goto error_out;
+ }
+
+ for (i = 0; i < keys->nkeys; i++) {
+ ret = ber_scanf(sctrl, "{i}", &encs[i]);
+ if (ret == LBER_ERROR) break;
+ }
+
+ ret = filter_keys(krbctx, keys, encs);
+ if (ret == 0) goto error_out;
+
+ if (err) ldap_memfree(err);
+ ber_free(sctrl, 1);
+ ldap_controls_free(srvctrl);
+ ldap_msgfree(res);
+ ldap_unbind_ext(ld, NULL, NULL);
+ return kvno;
+
+error_out:
+ if (sctrl) ber_free(sctrl, 1);
+ if (srvctrl) ldap_controls_free(srvctrl);
+ if (err) ldap_memfree(err);
+ if (res) ldap_msgfree(res);
+ if (ld) ldap_unbind_ext(ld, NULL, NULL);
+ if (control) ber_bvfree(control);
+ free(encs);
+ return 0;
+}
+
+static char *ask_password(krb5_context krbctx)
+{
+ krb5_prompt ap_prompts[2];
+ krb5_data k5d_pw0;
+ krb5_data k5d_pw1;
+ char pw0[256];
+ char pw1[256];
+ char *password;
+
+ k5d_pw0.length = sizeof(pw0);
+ k5d_pw0.data = pw0;
+ ap_prompts[0].prompt = "New Principal Password";
+ ap_prompts[0].hidden = 1;
+ ap_prompts[0].reply = &k5d_pw0;
+
+ k5d_pw1.length = sizeof(pw1);
+ k5d_pw1.data = pw1;
+ ap_prompts[1].prompt = "Verify Principal Password";
+ ap_prompts[1].hidden = 1;
+ ap_prompts[1].reply = &k5d_pw1;
+
+ krb5_prompter_posix(krbctx, NULL,
+ NULL, NULL,
+ 2, ap_prompts);
+
+ if (strcmp(pw0, pw1)) {
+ fprintf(stderr, "Passwords do not match!");
+ return NULL;
+ }
+
+ password = malloc(k5d_pw0.length + 1);
+ if (!password) return NULL;
+ memcpy(password, pw0, k5d_pw0.length);
+ password[k5d_pw0.length] = '\0';
+
+ return password;
+}
+
+int main(int argc, char *argv[])
+{
+ static const char *server = NULL;
+ static const char *principal = NULL;
+ static const char *keytab = NULL;
+ static const char *enctypes_string = NULL;
+ int quiet = 0;
+ int askpass = 0;
+ int permitted_enctypes = 0;
+ struct poptOption options[] = {
+ { "quiet", 'q', POPT_ARG_NONE, &quiet, 0, "Print as little as possible", "Output only on errors"},
+ { "server", 's', POPT_ARG_STRING, &server, 0, "Contact this specific KDC Server", "Server Name" },
+ { "principal", 'p', POPT_ARG_STRING, &principal, 0, "The principal to get a keytab for (ex: ftp/ftp.example.com@EXAMPLE.COM)", "Kerberos Service Principal Name" },
+ { "keytab", 'k', POPT_ARG_STRING, &keytab, 0, "File were to store the keytab information", "Keytab File Name" },
+ { "enctypes", 'e', POPT_ARG_STRING, &enctypes_string, 0, "Encryption types to request", "Comma separated encryption types list" },
+ { "permitted-enctypes", 0, POPT_ARG_NONE, &permitted_enctypes, 0, "Show the list of permitted encryption types and exit", "Permitted Encryption Types"},
+ { "password", 'P', POPT_ARG_NONE, &askpass, 0, "Asks for a non-random password to use for the principal" },
+ { NULL, 0, POPT_ARG_NONE, NULL, 0, NULL, NULL }
+ };
+ poptContext pc;
+ char *ktname;
+ char *password = NULL;
+ krb5_context krbctx;
+ krb5_ccache ccache;
+ krb5_principal uprinc;
+ krb5_principal sprinc;
+ krb5_error_code krberr;
+ ber_int_t *enctypes;
+ struct keys_container keys;
+ krb5_keytab kt;
+ int kvno;
+ int i, ret;
+
+ krberr = krb5_init_context(&krbctx);
+ if (krberr) {
+ fprintf(stderr, "Kerberos context initialization failed\n");
+ exit(1);
+ }
+
+ pc = poptGetContext("ipa-getkeytab", argc, (const char **)argv, options, 0);
+ ret = poptGetNextOpt(pc);
+ if (ret == -1 && permitted_enctypes &&
+ !(server || principal || keytab || quiet)) {
+ krb5_enctype *ktypes;
+ char enc[79]; /* fit std terminal or truncate */
+
+ krberr = krb5_get_permitted_enctypes(krbctx, &ktypes);
+ if (krberr) {
+ fprintf(stderr, "No system preferred enctypes ?!\n");
+ exit(1);
+ }
+ fprintf(stdout, "Supported encryption types:\n");
+ for (i = 0; ktypes[i]; i++) {
+ krberr = krb5_enctype_to_string(ktypes[i], enc, 79);
+ if (krberr) {
+ fprintf(stderr, "Warning: failed to convert type (#%d)\n", i);
+ continue;
+ }
+ fprintf(stdout, "%s\n", enc);
+ }
+ krb5_free_ktypes(krbctx, ktypes);
+ exit (0);
+ }
+
+ if (ret != -1 || !server || !principal || !keytab || permitted_enctypes) {
+ if (!quiet) {
+ poptPrintUsage(pc, stderr, 0);
+ }
+ exit(2);
+ }
+
+ if (askpass) {
+ password = ask_password(krbctx);
+ if (!password) {
+ exit(2);
+ }
+ } else if (enctypes_string && strchr(enctypes_string, ':')) {
+ if (!quiet) {
+ fprintf(stderr, "Warning: salt types are not honored with randomized passwords (see opt. -P)\n");
+ }
+ }
+
+ ret = asprintf(&ktname, "WRFILE:%s", keytab);
+ if (ret == -1) {
+ exit(3);
+ }
+
+ krberr = krb5_parse_name(krbctx, principal, &sprinc);
+ if (krberr) {
+ fprintf(stderr, "Invalid Service Principal Name\n");
+ exit(4);
+ }
+
+ krberr = krb5_cc_default(krbctx, &ccache);
+ if (krberr) {
+ fprintf(stderr, "Kerberos Credential Cache not found\n"
+ "Do you have a Kerberos Ticket?\n");
+ exit(5);
+ }
+
+ krberr = krb5_cc_get_principal(krbctx, ccache, &uprinc);
+ if (krberr) {
+ fprintf(stderr, "Kerberos User Principal not found\n"
+ "Do you have a valid Credential Cache?\n");
+ exit(6);
+ }
+
+ krberr = krb5_kt_resolve(krbctx, ktname, &kt);
+ if (krberr) {
+ fprintf(stderr, "Failed to open Keytab\n");
+ exit(7);
+ }
+
+ /* create key material */
+ ret = create_keys(krbctx, sprinc, password, enctypes_string, &keys);
+ if (!ret) {
+ fprintf(stderr, "Failed to create key material\n");
+ exit(8);
+ }
+
+ kvno = ldap_set_keytab(krbctx, server, principal, uprinc, &keys);
+ if (!kvno) {
+ exit(9);
+ }
+
+ for (i = 0; i < keys.nkeys; i++) {
+ krb5_keytab_entry kt_entry;
+ memset((char *)&kt_entry, 0, sizeof(kt_entry));
+ kt_entry.principal = sprinc;
+ kt_entry.key = keys.ksdata[i].key;
+ kt_entry.vno = kvno;
+
+ krberr = krb5_kt_add_entry(krbctx, kt, &kt_entry);
+ if (krberr) {
+ fprintf(stderr, "Failed to add key to the keytab\n");
+ exit (11);
+ }
+ }
+
+ free_keys_contents(krbctx, &keys);
+
+ krberr = krb5_kt_close(krbctx, kt);
+ if (krberr) {
+ fprintf(stderr, "Failed to close the keytab\n");
+ exit (12);
+ }
+
+ if (!quiet) {
+ fprintf(stderr,
+ "Keytab successfully retrieved and stored in: %s\n",
+ keytab);
+ }
+ exit(0);
+}
generated by cgit (git 2.34.1) at 2025-09-02 19:57:50 +0000