| 1 | /*
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| 2 | * Copyright (c) 1997 - 1999, 2002 - 2003 Kungliga Tekniska Högskolan
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| 3 | * (Royal Institute of Technology, Stockholm, Sweden).
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| 4 | * All rights reserved.
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| 5 | *
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| 6 | * Redistribution and use in source and binary forms, with or without
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| 7 | * modification, are permitted provided that the following conditions
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| 8 | * are met:
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| 9 | *
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| 10 | * 1. Redistributions of source code must retain the above copyright
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| 11 | * notice, this list of conditions and the following disclaimer.
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| 12 | *
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| 13 | * 2. Redistributions in binary form must reproduce the above copyright
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| 14 | * notice, this list of conditions and the following disclaimer in the
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| 15 | * documentation and/or other materials provided with the distribution.
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| 16 | *
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| 17 | * 3. Neither the name of the Institute nor the names of its contributors
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| 18 | * may be used to endorse or promote products derived from this software
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| 19 | * without specific prior written permission.
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| 20 | *
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| 21 | * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 31 | * SUCH DAMAGE.
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| 32 | */
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| 33 |
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| 34 | #include "krb5_locl.h"
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| 35 |
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| 36 | KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
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| 37 | krb5_aname_to_localname (krb5_context context,
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| 38 | krb5_const_principal aname,
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| 39 | size_t lnsize,
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| 40 | char *lname)
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| 41 | {
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| 42 | krb5_error_code ret;
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| 43 | krb5_realm *lrealms, *r;
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| 44 | int valid;
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| 45 | size_t len;
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| 46 | const char *res;
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| 47 |
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| 48 | ret = krb5_get_default_realms (context, &lrealms);
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| 49 | if (ret)
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| 50 | return ret;
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| 51 |
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| 52 | valid = 0;
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| 53 | for (r = lrealms; *r != NULL; ++r) {
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| 54 | if (strcmp (*r, aname->realm) == 0) {
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| 55 | valid = 1;
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| 56 | break;
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| 57 | }
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| 58 | }
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| 59 | krb5_free_host_realm (context, lrealms);
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| 60 | if (valid == 0)
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| 61 | return KRB5_NO_LOCALNAME;
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| 62 |
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| 63 | if (aname->name.name_string.len == 1)
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| 64 | res = aname->name.name_string.val[0];
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| 65 | else if (aname->name.name_string.len == 2
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| 66 | && strcmp (aname->name.name_string.val[1], "root") == 0) {
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| 67 | krb5_principal rootprinc;
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| 68 | krb5_boolean userok;
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| 69 |
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| 70 | res = "root";
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| 71 |
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| 72 | ret = krb5_copy_principal(context, aname, &rootprinc);
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| 73 | if (ret)
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| 74 | return ret;
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| 75 |
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| 76 | userok = krb5_kuserok(context, rootprinc, res);
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| 77 | krb5_free_principal(context, rootprinc);
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| 78 | if (!userok)
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| 79 | return KRB5_NO_LOCALNAME;
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| 80 |
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| 81 | } else
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| 82 | return KRB5_NO_LOCALNAME;
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| 83 |
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| 84 | len = strlen (res);
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| 85 | if (len >= lnsize)
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| 86 | return ERANGE;
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| 87 | strlcpy (lname, res, lnsize);
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| 88 |
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| 89 | return 0;
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| 90 | }
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