diff options
Diffstat (limited to 'source4/auth/kerberos/keytab_copy.c')
| -rw-r--r-- | source4/auth/kerberos/keytab_copy.c | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/source4/auth/kerberos/keytab_copy.c b/source4/auth/kerberos/keytab_copy.c new file mode 100644 index 0000000000..ba4ea2bf39 --- /dev/null +++ b/source4/auth/kerberos/keytab_copy.c @@ -0,0 +1,146 @@ +/* + * Copyright (c) 1997-2004 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 "includes.h" +#include "system/kerberos.h" +#include "auth/kerberos/kerberos.h" + +static const krb5_boolean verbose_flag = FALSE; + +static krb5_boolean +compare_keyblock(const krb5_keyblock *a, const krb5_keyblock *b) +{ + if(a->keytype != b->keytype || + a->keyvalue.length != b->keyvalue.length || + memcmp(a->keyvalue.data, b->keyvalue.data, a->keyvalue.length) != 0) + return FALSE; + return TRUE; +} + +krb5_error_code kt_copy (krb5_context context, const char *from, const char *to) +{ + krb5_error_code ret; + krb5_keytab src_keytab, dst_keytab; + krb5_kt_cursor cursor; + krb5_keytab_entry entry, dummy; + + ret = krb5_kt_resolve (context, from, &src_keytab); + if (ret) { + krb5_warn (context, ret, "resolving src keytab `%s'", from); + return 1; + } + + ret = krb5_kt_resolve (context, to, &dst_keytab); + if (ret) { + krb5_kt_close (context, src_keytab); + krb5_warn (context, ret, "resolving dst keytab `%s'", to); + return 1; + } + + ret = krb5_kt_start_seq_get (context, src_keytab, &cursor); + if (ret) { + krb5_warn (context, ret, "krb5_kt_start_seq_get %s", from); + goto out; + } + + if (verbose_flag) + fprintf(stderr, "copying %s to %s\n", from, to); + + while((ret = krb5_kt_next_entry(context, src_keytab, + &entry, &cursor)) == 0) { + char *name_str; + char *etype_str; + ret = krb5_unparse_name (context, entry.principal, &name_str); + if(ret) { + krb5_warn(context, ret, "krb5_unparse_name"); + name_str = NULL; /* XXX */ + } + ret = krb5_enctype_to_string(context, entry.keyblock.keytype, &etype_str); + if(ret) { + krb5_warn(context, ret, "krb5_enctype_to_string"); + etype_str = NULL; /* XXX */ + } + ret = krb5_kt_get_entry(context, dst_keytab, + entry.principal, + entry.vno, + entry.keyblock.keytype, + &dummy); + if(ret == 0) { + /* this entry is already in the new keytab, so no need to + copy it; if the keyblocks are not the same, something + is weird, so complain about that */ + if(!compare_keyblock(&entry.keyblock, &dummy.keyblock)) { + krb5_warnx(context, "entry with different keyvalue " + "already exists for %s, keytype %s, kvno %d", + name_str, etype_str, entry.vno); + } + krb5_kt_free_entry(context, &dummy); + krb5_kt_free_entry (context, &entry); + free(name_str); + free(etype_str); + continue; + } else if(ret != KRB5_KT_NOTFOUND) { + krb5_warn (context, ret, "%s: fetching %s/%s/%u", + to, name_str, etype_str, entry.vno); + krb5_kt_free_entry (context, &entry); + free(name_str); + free(etype_str); + break; + } + if (verbose_flag) + fprintf (stderr, "copying %s, keytype %s, kvno %d\n", name_str, + etype_str, entry.vno); + ret = krb5_kt_add_entry (context, dst_keytab, &entry); + krb5_kt_free_entry (context, &entry); + if (ret) { + krb5_warn (context, ret, "%s: adding %s/%s/%u", + to, name_str, etype_str, entry.vno); + free(name_str); + free(etype_str); + break; + } + free(name_str); + free(etype_str); + } + krb5_kt_end_seq_get (context, src_keytab, &cursor); + + out: + krb5_kt_close (context, src_keytab); + krb5_kt_close (context, dst_keytab); + if (ret == KRB5_KT_END) { + return 0; + } else if (ret == 0) { + return EINVAL; + } + return ret; +} |