Nicolas Williams 57f1545a46 Add support for writing to KDB and dumping HDB to MIT KDB dump format
Before this change Heimdal could read KDBs.  Now it can write to
    them too.

    Heimdal can now also dump HDBs (including KDBs) in MIT format, which
    can then be imported with kdb5_util load.

    This is intended to help in migrations from MIT to Heimdal by
    allowing migrations from Heimdal to MIT so that it is possible
    to rollback from Heimdal to MIT should there be any issues.  The
    idea is to allow a) running Heimdal kdc/kadmind with a KDB, or
    b) running Heimdal with an HDB converted from a KDB and then
    rollback by dumping the HDB and loading a KDB.

    Note that not all TL data types are supported, only two: last
    password change and modify-by.  This is the minimum necessary.
    PKINIT users may need to add support for KRB5_TL_USER_CERTIFICATE,
    and for databases with K/M history we may need to add KRB5_TL_MKVNO
    support.

    Support for additional TL data types can be added in
    lib/hdb/hdb-mitdb.c:_hdb_mdb_value2entry() and
    lib/hdb/print.c:entry2mit_string_int().
2012-05-03 14:24:18 -05:00

88 lines
2.9 KiB
C

/*
* Copyright (c) 1997-2004 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
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* 2. Redistributions in binary form must reproduce the above copyright
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* may be used to endorse or promote products derived from this software
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*/
#include "kadmin_locl.h"
#include "kadmin-commands.h"
#include <kadm5/private.h>
extern int local_flag;
int
dump(struct dump_options *opt, int argc, char **argv)
{
krb5_error_code ret;
FILE *f;
struct hdb_print_entry_arg parg;
HDB *db = NULL;
if (!local_flag) {
krb5_warnx(context, "dump is only available in local (-l) mode");
return 0;
}
db = _kadm5_s_get_db(kadm_handle);
if (argc == 0)
f = stdout;
else
f = fopen(argv[0], "w");
if (f == NULL) {
krb5_warn(context, errno, "open: %s", argv[0]);
goto out;
}
ret = db->hdb_open(context, db, O_RDONLY, 0600);
if (ret) {
krb5_warn(context, ret, "hdb_open");
goto out;
}
if (!opt->format_string || strcmp(opt->format_string, "Heimdal") == 0) {
parg.fmt = HDB_DUMP_HEIMDAL;
} else if (opt->format_string && strcmp(opt->format_string, "MIT") == 0) {
parg.fmt = HDB_DUMP_MIT;
fprintf(f, "kdb5_util load_dump version 5\n"); /* 5||6, either way */
} else {
krb5_errx(context, 1, "Supported dump formats: Heimdal and MIT");
}
parg.out = f;
hdb_foreach(context, db, opt->decrypt_flag ? HDB_F_DECRYPT : 0,
hdb_print_entry, &parg);
db->hdb_close(context, db);
out:
if(f && f != stdout)
fclose(f);
return 0;
}