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-rw-r--r--third_party/heimdal/kadmin/util.c762
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+/*
+ * Copyright (c) 1997 - 2006 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 "kadmin_locl.h"
+#include <parse_units.h>
+
+/*
+ * util.c - functions for parsing, unparsing, and editing different
+ * types of data used in kadmin.
+ */
+
+static int
+get_response(const char *prompt, const char *def, char *buf, size_t len);
+
+/*
+ * attributes
+ */
+
+struct units kdb_attrs[] = {
+ { "disallow-client", KRB5_KDB_DISALLOW_CLIENT },
+ { "virtual", KRB5_KDB_VIRTUAL },
+ { "virtual-keys", KRB5_KDB_VIRTUAL_KEYS },
+ { "materialize", KRB5_KDB_MATERIALIZE },
+ { "allow-digest", KRB5_KDB_ALLOW_DIGEST },
+ { "allow-kerberos4", KRB5_KDB_ALLOW_KERBEROS4 },
+ { "trusted-for-delegation", KRB5_KDB_TRUSTED_FOR_DELEGATION },
+ { "ok-as-delegate", KRB5_KDB_OK_AS_DELEGATE },
+ { "new-princ", KRB5_KDB_NEW_PRINC },
+ { "support-desmd5", KRB5_KDB_SUPPORT_DESMD5 },
+ { "pwchange-service", KRB5_KDB_PWCHANGE_SERVICE },
+ { "disallow-svr", KRB5_KDB_DISALLOW_SVR },
+ { "requires-pw-change", KRB5_KDB_REQUIRES_PWCHANGE },
+ { "requires-hw-auth", KRB5_KDB_REQUIRES_HW_AUTH },
+ { "requires-pre-auth", KRB5_KDB_REQUIRES_PRE_AUTH },
+ { "disallow-all-tix", KRB5_KDB_DISALLOW_ALL_TIX },
+ { "disallow-dup-skey", KRB5_KDB_DISALLOW_DUP_SKEY },
+ { "disallow-proxiable", KRB5_KDB_DISALLOW_PROXIABLE },
+ { "disallow-renewable", KRB5_KDB_DISALLOW_RENEWABLE },
+ { "disallow-tgt-based", KRB5_KDB_DISALLOW_TGT_BASED },
+ { "disallow-forwardable", KRB5_KDB_DISALLOW_FORWARDABLE },
+ { "disallow-postdated", KRB5_KDB_DISALLOW_POSTDATED },
+ { "no-auth-data-reqd", KRB5_KDB_NO_AUTH_DATA_REQUIRED },
+ { NULL, 0 }
+};
+
+/*
+ * convert the attributes in `attributes' into a printable string
+ * in `str, len'
+ */
+
+void
+attributes2str(krb5_flags attributes, char *str, size_t len)
+{
+ unparse_flags (attributes, kdb_attrs, str, len);
+}
+
+/*
+ * convert the string in `str' into attributes in `flags'
+ * return 0 if parsed ok, else -1.
+ */
+
+int
+str2attributes(const char *str, krb5_flags *flags)
+{
+ int res;
+
+ res = parse_flags (str, kdb_attrs, *flags);
+ if (res < 0)
+ return res;
+ else {
+ *flags = res;
+ return 0;
+ }
+}
+
+/*
+ * try to parse the string `resp' into attributes in `attr', also
+ * setting the `bit' in `mask' if attributes are given and valid.
+ */
+
+int
+parse_attributes (const char *resp, krb5_flags *attr, int *mask, int bit)
+{
+ krb5_flags tmp = *attr;
+
+ if (str2attributes(resp, &tmp) == 0) {
+ *attr = tmp;
+ if (mask)
+ *mask |= bit;
+ return 0;
+ } else if(*resp == '?') {
+ print_flags_table (kdb_attrs, stderr);
+ } else {
+ fprintf (stderr, "Unable to parse \"%s\"\n", resp);
+ }
+ return -1;
+}
+
+/*
+ * allow the user to edit the attributes in `attr', prompting with `prompt'
+ */
+
+int
+edit_attributes (const char *prompt, krb5_flags *attr, int *mask, int bit)
+{
+ char buf[1024], resp[1024];
+
+ if (mask && (*mask & bit))
+ return 0;
+
+ attributes2str(*attr, buf, sizeof(buf));
+ for (;;) {
+ if(get_response("Attributes", buf, resp, sizeof(resp)) != 0)
+ return 1;
+ if (resp[0] == '\0')
+ break;
+ if (parse_attributes (resp, attr, mask, bit) == 0)
+ break;
+ }
+ return 0;
+}
+
+/*
+ * try to parse the string `resp' into policy in `attr', also
+ * setting the `bit' in `mask' if attributes are given and valid.
+ */
+
+#define VALID_POLICY_NAME_CHARS \
+ "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_"
+
+int
+parse_policy (const char *resp, char **policy, int *mask, int bit)
+{
+ if (strspn(resp, VALID_POLICY_NAME_CHARS) == strlen(resp) &&
+ *resp != '\0') {
+
+ *policy = strdup(resp);
+ if (*policy == NULL) {
+ fprintf (stderr, "Out of memory");
+ return -1;
+ }
+ if (mask)
+ *mask |= bit;
+ return 0;
+ } else if(*resp == '?') {
+ print_flags_table (kdb_attrs, stderr);
+ } else {
+ fprintf (stderr, "Unable to parse \"%s\"\n", resp);
+ }
+ return -1;
+}
+
+/*
+ * allow the user to edit the attributes in `attr', prompting with `prompt'
+ */
+
+int
+edit_policy (const char *prompt, char **policy, int *mask, int bit)
+{
+ char buf[1024], resp[1024];
+
+ if (mask && (*mask & bit))
+ return 0;
+
+ buf[0] = '\0';
+ strlcpy(buf, "default", sizeof (buf));
+ for (;;) {
+ if(get_response("Policy", buf, resp, sizeof(resp)) != 0)
+ return 1;
+ if (resp[0] == '\0')
+ break;
+ if (parse_policy (resp, policy, mask, bit) == 0)
+ break;
+ }
+ return 0;
+}
+
+/*
+ * time_t
+ * the special value 0 means ``never''
+ */
+
+/*
+ * Convert the time `t' to a string representation in `str' (of max
+ * size `len'). If include_time also include time, otherwise just
+ * date.
+ */
+
+void
+time_t2str(time_t t, char *str, size_t len, int include_time)
+{
+ if(t) {
+ if(include_time)
+ strftime(str, len, "%Y-%m-%d %H:%M:%S UTC", gmtime(&t));
+ else
+ strftime(str, len, "%Y-%m-%d", gmtime(&t));
+ } else
+ snprintf(str, len, "never");
+}
+
+/*
+ * Convert the time representation in `str' to a time in `time'.
+ * Return 0 if succesful, else -1.
+ */
+
+int
+str2time_t (const char *str, time_t *t)
+{
+ const char *p;
+ struct tm tm, tm2;
+
+ memset (&tm, 0, sizeof (tm));
+ memset (&tm2, 0, sizeof (tm2));
+
+ while(isspace((unsigned char)*str))
+ str++;
+
+ if (str[0] == '+') {
+ str++;
+ *t = parse_time(str, "month");
+ if (*t < 0)
+ return -1;
+ *t += time(NULL);
+ return 0;
+ }
+ if (str[0] == '-') {
+ str++;
+ *t = parse_time(str, "month");
+ if (*t < 0)
+ return -1;
+ *t = time(NULL) - *t;
+ return 0;
+ }
+
+ if(strcasecmp(str, "never") == 0) {
+ *t = 0;
+ return 0;
+ }
+
+ if(strcasecmp(str, "now") == 0) {
+ *t = time(NULL);
+ return 0;
+ }
+
+ p = strptime (str, "%Y-%m-%d", &tm);
+
+ if (p == NULL)
+ return -1;
+
+ while(isspace((unsigned char)*p))
+ p++;
+
+ /* XXX this is really a bit optimistic, we should really complain
+ if there was a problem parsing the time */
+ if(p[0] != '\0' && strptime (p, "%H:%M:%S", &tm2) != NULL) {
+ tm.tm_hour = tm2.tm_hour;
+ tm.tm_min = tm2.tm_min;
+ tm.tm_sec = tm2.tm_sec;
+ } else {
+ /* Do it on the end of the day */
+ tm.tm_hour = 23;
+ tm.tm_min = 59;
+ tm.tm_sec = 59;
+ }
+
+ *t = tm2time (tm, 0);
+ return 0;
+}
+
+/*
+ * try to parse the time in `resp' storing it in `value'
+ */
+
+int
+parse_timet (const char *resp, krb5_timestamp *value, int *mask, int bit)
+{
+ time_t tmp;
+
+ if (str2time_t(resp, &tmp) == 0) {
+ *value = tmp;
+ if(mask)
+ *mask |= bit;
+ return 0;
+ }
+ if(*resp != '?')
+ fprintf (stderr, "Unable to parse time \"%s\"\n", resp);
+ fprintf (stderr, "Print date on format YYYY-mm-dd [hh:mm:ss]\n");
+ return -1;
+}
+
+/*
+ * allow the user to edit the time in `value'
+ */
+
+int
+edit_timet (const char *prompt, krb5_timestamp *value, int *mask, int bit)
+{
+ char buf[1024], resp[1024];
+
+ if (mask && (*mask & bit))
+ return 0;
+
+ time_t2str (*value, buf, sizeof (buf), 0);
+
+ for (;;) {
+ if(get_response(prompt, buf, resp, sizeof(resp)) != 0)
+ return 1;
+ if (parse_timet (resp, value, mask, bit) == 0)
+ break;
+ }
+ return 0;
+}
+
+/*
+ * deltat
+ * the special value 0 means ``unlimited''
+ */
+
+/*
+ * convert the delta_t value in `t' into a printable form in `str, len'
+ */
+
+void
+deltat2str(unsigned t, char *str, size_t len)
+{
+ if(t == 0 || t == INT_MAX)
+ snprintf(str, len, "unlimited");
+ else
+ unparse_time(t, str, len);
+}
+
+/*
+ * parse the delta value in `str', storing result in `*delta'
+ * return 0 if ok, else -1
+ */
+
+int
+str2deltat(const char *str, krb5_deltat *delta)
+{
+ int res;
+
+ if(strcasecmp(str, "unlimited") == 0) {
+ *delta = 0;
+ return 0;
+ }
+ res = parse_time(str, "day");
+ if (res < 0)
+ return res;
+ else {
+ *delta = res;
+ return 0;
+ }
+}
+
+/*
+ * try to parse the string in `resp' into a deltad in `value'
+ * `mask' will get the bit `bit' set if a value was given.
+ */
+
+int
+parse_deltat (const char *resp, krb5_deltat *value, int *mask, int bit)
+{
+ krb5_deltat tmp;
+
+ if (str2deltat(resp, &tmp) == 0) {
+ *value = tmp;
+ if (mask)
+ *mask |= bit;
+ return 0;
+ } else if(*resp == '?') {
+ print_time_table (stderr);
+ } else {
+ fprintf (stderr, "Unable to parse time \"%s\"\n", resp);
+ }
+ return -1;
+}
+
+/*
+ * allow the user to edit the deltat in `value'
+ */
+
+int
+edit_deltat (const char *prompt, krb5_deltat *value, int *mask, int bit)
+{
+ char buf[1024], resp[1024];
+
+ if (mask && (*mask & bit))
+ return 0;
+
+ deltat2str(*value, buf, sizeof(buf));
+ for (;;) {
+ if(get_response(prompt, buf, resp, sizeof(resp)) != 0)
+ return 1;
+ if (parse_deltat (resp, value, mask, bit) == 0)
+ break;
+ }
+ return 0;
+}
+
+/*
+ * allow the user to edit `ent'
+ */
+
+void
+set_defaults(kadm5_principal_ent_t ent, int *mask,
+ kadm5_principal_ent_t default_ent, int default_mask)
+{
+ if (default_ent
+ && (default_mask & KADM5_MAX_LIFE)
+ && !(*mask & KADM5_MAX_LIFE))
+ ent->max_life = default_ent->max_life;
+
+ if (default_ent
+ && (default_mask & KADM5_MAX_RLIFE)
+ && !(*mask & KADM5_MAX_RLIFE))
+ ent->max_renewable_life = default_ent->max_renewable_life;
+
+ if (default_ent
+ && (default_mask & KADM5_PRINC_EXPIRE_TIME)
+ && !(*mask & KADM5_PRINC_EXPIRE_TIME))
+ ent->princ_expire_time = default_ent->princ_expire_time;
+
+ if (default_ent
+ && (default_mask & KADM5_PW_EXPIRATION)
+ && !(*mask & KADM5_PW_EXPIRATION))
+ ent->pw_expiration = default_ent->pw_expiration;
+
+ if (default_ent
+ && (default_mask & KADM5_ATTRIBUTES)
+ && !(*mask & KADM5_ATTRIBUTES))
+ ent->attributes = default_ent->attributes & ~KRB5_KDB_DISALLOW_ALL_TIX;
+
+ if (default_ent
+ && (default_mask & KADM5_POLICY)
+ && !(*mask & KADM5_POLICY)) {
+ ent->policy = strdup(default_ent->policy);
+ if (ent->policy == NULL)
+ abort();
+ }
+}
+
+int
+edit_entry(kadm5_principal_ent_t ent, int *mask,
+ kadm5_principal_ent_t default_ent, int default_mask)
+{
+
+ set_defaults(ent, mask, default_ent, default_mask);
+
+ if(edit_deltat ("Max ticket life", &ent->max_life, mask,
+ KADM5_MAX_LIFE) != 0)
+ return 1;
+
+ if(edit_deltat ("Max renewable life", &ent->max_renewable_life, mask,
+ KADM5_MAX_RLIFE) != 0)
+ return 1;
+
+ if(edit_timet ("Principal expiration time", &ent->princ_expire_time, mask,
+ KADM5_PRINC_EXPIRE_TIME) != 0)
+ return 1;
+
+ if(edit_timet ("Password expiration time", &ent->pw_expiration, mask,
+ KADM5_PW_EXPIRATION) != 0)
+ return 1;
+
+ if(edit_attributes ("Attributes", &ent->attributes, mask,
+ KADM5_ATTRIBUTES) != 0)
+ return 1;
+
+ if(edit_policy ("Policy", &ent->policy, mask,
+ KADM5_POLICY) != 0)
+ return 1;
+
+ return 0;
+}
+
+/*
+ * Parse the arguments, set the fields in `ent' and the `mask' for the
+ * entries having been set.
+ * Return 1 on failure and 0 on success.
+ */
+
+int
+set_entry(krb5_context contextp,
+ kadm5_principal_ent_t ent,
+ int *mask,
+ const char *max_ticket_life,
+ const char *max_renewable_life,
+ const char *expiration,
+ const char *pw_expiration,
+ const char *attributes,
+ const char *policy)
+{
+ if (max_ticket_life != NULL) {
+ if (parse_deltat (max_ticket_life, &ent->max_life,
+ mask, KADM5_MAX_LIFE)) {
+ krb5_warnx (contextp, "unable to parse `%s'", max_ticket_life);
+ return 1;
+ }
+ }
+ if (max_renewable_life != NULL) {
+ if (parse_deltat (max_renewable_life, &ent->max_renewable_life,
+ mask, KADM5_MAX_RLIFE)) {
+ krb5_warnx (contextp, "unable to parse `%s'", max_renewable_life);
+ return 1;
+ }
+ }
+
+ if (expiration) {
+ if (parse_timet (expiration, &ent->princ_expire_time,
+ mask, KADM5_PRINC_EXPIRE_TIME)) {
+ krb5_warnx (contextp, "unable to parse `%s'", expiration);
+ return 1;
+ }
+ }
+ if (pw_expiration) {
+ if (parse_timet (pw_expiration, &ent->pw_expiration,
+ mask, KADM5_PW_EXPIRATION)) {
+ krb5_warnx (contextp, "unable to parse `%s'", pw_expiration);
+ return 1;
+ }
+ }
+ if (attributes != NULL) {
+ if (parse_attributes (attributes, &ent->attributes,
+ mask, KADM5_ATTRIBUTES)) {
+ krb5_warnx (contextp, "unable to parse `%s'", attributes);
+ return 1;
+ }
+ }
+ if (policy != NULL) {
+ if (parse_policy (policy, &ent->policy,
+ mask, KADM5_POLICY)) {
+ krb5_warnx (contextp, "unable to parse `%s'", attributes);
+ return 1;
+ }
+ }
+ return 0;
+}
+
+/*
+ * Does `string' contain any globing characters?
+ */
+
+static int
+is_expression(const char *string)
+{
+ const char *p;
+ int quote = 0;
+
+ for(p = string; *p; p++) {
+ if(quote) {
+ quote = 0;
+ continue;
+ }
+ if(*p == '\\')
+ quote++;
+ else if(strchr("[]*?", *p) != NULL)
+ return 1;
+ }
+ return 0;
+}
+
+/*
+ * Loop over all principals matching exp. If any of calls to `func'
+ * failes, the first error is returned when all principals are
+ * processed.
+ */
+int
+foreach_principal(const char *exp_str,
+ int (*func)(krb5_principal, void*),
+ const char *funcname,
+ void *data)
+{
+ char **princs = NULL;
+ int num_princs = 0;
+ int i;
+ krb5_error_code saved_ret = 0, ret = 0;
+ krb5_principal princ_ent;
+ int is_expr;
+
+ /* if this isn't an expression, there is no point in wading
+ through the whole database looking for matches */
+ is_expr = is_expression(exp_str);
+ if(is_expr)
+ ret = kadm5_get_principals(kadm_handle, exp_str, &princs, &num_princs);
+ if(!is_expr || ret == KADM5_AUTH_LIST) {
+ /* we might be able to perform the requested opreration even
+ if we're not allowed to list principals */
+ num_princs = 1;
+ princs = malloc(sizeof(*princs));
+ if(princs == NULL)
+ return ENOMEM;
+ princs[0] = strdup(exp_str);
+ if(princs[0] == NULL){
+ free(princs);
+ return ENOMEM;
+ }
+ } else if(ret) {
+ krb5_warn(context, ret, "kadm5_get_principals");
+ return ret;
+ }
+ for(i = 0; i < num_princs; i++) {
+ ret = krb5_parse_name(context, princs[i], &princ_ent);
+ if(ret){
+ krb5_warn(context, ret, "krb5_parse_name(%s)", princs[i]);
+ continue;
+ }
+ ret = (*func)(princ_ent, data);
+ if(ret) {
+ krb5_warn(context, ret, "%s %s", funcname, princs[i]);
+ krb5_clear_error_message(context);
+ if (saved_ret == 0)
+ saved_ret = ret;
+ }
+ krb5_free_principal(context, princ_ent);
+ }
+ if (ret == 0 && saved_ret != 0)
+ ret = saved_ret;
+ kadm5_free_name_list(kadm_handle, princs, &num_princs);
+ return ret;
+}
+
+/*
+ * prompt with `prompt' and default value `def', and store the reply
+ * in `buf, len'
+ */
+
+#include <setjmp.h>
+
+static jmp_buf jmpbuf;
+
+static void
+interrupt(int sig)
+{
+ longjmp(jmpbuf, 1);
+}
+
+static int
+get_response(const char *prompt, const char *def, char *buf, size_t len)
+{
+ char *p;
+ void (*osig)(int);
+
+ osig = signal(SIGINT, interrupt);
+ if(setjmp(jmpbuf)) {
+ signal(SIGINT, osig);
+ fprintf(stderr, "\n");
+ return 1;
+ }
+
+ fprintf(stderr, "%s [%s]:", prompt, def);
+ if(fgets(buf, len, stdin) == NULL) {
+ int save_errno = errno;
+ if(ferror(stdin))
+ krb5_err(context, 1, save_errno, "<stdin>");
+ signal(SIGINT, osig);
+ return 1;
+ }
+ p = strchr(buf, '\n');
+ if(p)
+ *p = '\0';
+ if(strcmp(buf, "") == 0)
+ strlcpy(buf, def, len);
+ signal(SIGINT, osig);
+ return 0;
+}
+
+/*
+ * return [0, 16) or -1
+ */
+
+static int
+hex2n (char c)
+{
+ static char hexdigits[] = "0123456789abcdef";
+ const char *p;
+
+ p = strchr (hexdigits, tolower((unsigned char)c));
+ if (p == NULL)
+ return -1;
+ else
+ return p - hexdigits;
+}
+
+/*
+ * convert a key in a readable format into a keyblock.
+ * return 0 iff succesful, otherwise `err' should point to an error message
+ */
+
+int
+parse_des_key (const char *key_string, krb5_key_data *key_data,
+ const char **error)
+{
+ const char *p = key_string;
+ unsigned char bits[8];
+ int i;
+
+ if (strlen (key_string) != 16) {
+ *error = "bad length, should be 16 for DES key";
+ return 1;
+ }
+ for (i = 0; i < 8; ++i) {
+ int d1, d2;
+
+ d1 = hex2n(p[2 * i]);
+ d2 = hex2n(p[2 * i + 1]);
+ if (d1 < 0 || d2 < 0) {
+ *error = "non-hex character";
+ return 1;
+ }
+ bits[i] = (d1 << 4) | d2;
+ }
+ for (i = 0; i < 3; ++i) {
+ key_data[i].key_data_ver = 2;
+ key_data[i].key_data_kvno = 0;
+ /* key */
+ key_data[i].key_data_type[0] = ETYPE_DES_CBC_CRC;
+ key_data[i].key_data_length[0] = 8;
+ key_data[i].key_data_contents[0] = malloc(8);
+ if (key_data[i].key_data_contents[0] == NULL) {
+ *error = "malloc";
+ return ENOMEM;
+ }
+ memcpy (key_data[i].key_data_contents[0], bits, 8);
+ /* salt */
+ key_data[i].key_data_type[1] = KRB5_PW_SALT;
+ key_data[i].key_data_length[1] = 0;
+ key_data[i].key_data_contents[1] = NULL;
+ }
+ key_data[0].key_data_type[0] = ETYPE_DES_CBC_MD5;
+ key_data[1].key_data_type[0] = ETYPE_DES_CBC_MD4;
+ return 0;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-23 19:09:00 +0000