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/*
*----------------------------------------------------------------------------
*
* krb5wrap.cpp
*
* (C) 2004-2006 Dan Perry (dperry@pppl.gov)
* (C) 2006 Brian Elliott Finley (finley@anl.gov)
* (C) 2009-2010 Doug Engert (deengert@anl.gov)
* (C) 2010 James Y Knight (foom@fuhm.net)
*
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; either version 2 of the License, or
(at your option) any later version.
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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*-----------------------------------------------------------------------------
*/
#include "msktutil.h"
#ifdef HEIMDAL
krb5_error_code krb5_free_keytab_entry_contents(krb5_context context, krb5_keytab_entry *entry)
{
if (entry) {
krb5_free_principal(context, entry->principal);
if (entry->keyblock.keyvalue.data) {
memset(entry->keyblock.keyvalue.data, 0, entry->keyblock.keyvalue.length);
free(entry->keyblock.keyvalue.data);
}
return 0;
}
return -1;
}
#endif
KRB5Context::KRB5Context() {
VERBOSE("Creating Kerberos Context");
krb5_error_code ret = krb5_init_context(&m_context);
if (ret)
throw KRB5Exception("krb5_init_context", ret);
}
KRB5Context::~KRB5Context() {
VERBOSE("Destroying Kerberos Context");
krb5_free_context(m_context);
}
void KRB5Context::reload() {
VERBOSE("Reloading Kerberos Context");
krb5_free_context(m_context);
krb5_error_code ret = krb5_init_context(&m_context);
if (ret)
throw KRB5Exception("krb5_init_context", ret);
}
void KRB5Keyblock::from_string(krb5_enctype enctype, const std::string &password, const std::string &salt) {
#ifdef HEIMDAL
krb5_data pass_data;
krb5_salt salt_data;
salt_data.salttype = KRB5_PW_SALT;
salt_data.saltvalue.data = const_cast<char *>(salt.c_str());
salt_data.saltvalue.length = salt.length();
pass_data.data = const_cast<char *>(password.c_str());
pass_data.length = password.length();
krb5_error_code ret = krb5_string_to_key_data_salt(g_context.get(), enctype,
pass_data, salt_data, &m_keyblock);
if (ret)
throw KRB5Exception("krb5_string_to_key_data_salt", ret);
#else
krb5_data salt_data, pass_data;
salt_data.data = const_cast<char *>(salt.c_str());
salt_data.length = salt.length();
pass_data.data = const_cast<char *>(password.c_str());
pass_data.length = password.length();
krb5_error_code ret = krb5_c_string_to_key(g_context.get(), enctype,
&pass_data, &salt_data, &m_keyblock);
if (ret)
throw KRB5Exception("krb5_c_string_to_key", ret);
#endif
}
void KRB5CCache::initialize(KRB5Principal &principal) {
krb5_error_code ret = krb5_cc_initialize(g_context.get(), m_ccache, principal.get());
if (ret)
throw KRB5Exception("krb5_cc_initialize", ret);
}
void KRB5CCache::store(KRB5Creds &creds) {
krb5_error_code ret = krb5_cc_store_cred(g_context.get(), m_ccache, creds.get());
if (ret)
throw KRB5Exception("krb5_cc_store_cred", ret);
}
KRB5Creds::KRB5Creds(KRB5Principal &principal, KRB5Keytab &keytab, const char *tkt_service) : m_creds() {
krb5_error_code ret =
krb5_get_init_creds_keytab(g_context.get(), &m_creds, principal.get(), keytab.get(), 0, const_cast<char*>(tkt_service), NULL);
if (ret)
throw KRB5Exception("krb5_get_init_creds_keytab", ret);
}
KRB5Creds::KRB5Creds(KRB5Principal &principal, const std::string &password, const char *tkt_service) : m_creds() {
krb5_error_code ret =
krb5_get_init_creds_password(g_context.get(), &m_creds, principal.get(),
const_cast<char*>(password.c_str()), NULL, NULL,
0, const_cast<char*>(tkt_service), NULL);
if (ret)
throw KRB5Exception("krb5_get_init_creds_keytab", ret);
}
std::string KRB5Principal::name() {
char *principal_string;
krb5_error_code ret = krb5_unparse_name(g_context.get(), m_princ, &principal_string);
if (ret)
throw KRB5Exception("krb5_unparse_name", ret);
std::string result(principal_string);
#ifdef HEIMDAL
krb5_xfree(principal_string);
#else
krb5_free_unparsed_name(g_context.get(), principal_string);
#endif
return result;
}
void KRB5Keytab::addEntry(KRB5Principal &princ, krb5_kvno kvno, KRB5Keyblock &keyblock) {
krb5_keytab_entry entry;
entry.principal = princ.get();
entry.vno = kvno;
#ifdef HEIMDAL
entry.keyblock = keyblock.get();
#else
entry.key = keyblock.get();
#endif
krb5_error_code ret = krb5_kt_add_entry(g_context.get(), m_keytab, &entry);
if (ret)
throw KRB5Exception("krb5_kt_add_entry", ret);
}
void KRB5Keytab::removeEntry(KRB5Principal &princ, krb5_kvno kvno, krb5_enctype enctype) {
krb5_keytab_entry entry;
entry.principal = princ.get();
entry.vno = kvno;
#ifdef HEIMDAL
entry.keyblock.keytype = enctype;
#else
entry.key.enctype = enctype;
#endif
krb5_error_code ret = krb5_kt_remove_entry(g_context.get(), m_keytab, &entry);
if (ret)
throw KRB5Exception("krb5_kt_remove_entry", ret);
}
KRB5Keytab::cursor::cursor(KRB5Keytab &keytab) : m_keytab(keytab), m_cursor(), m_entry(), m_princ() {
krb5_error_code ret = krb5_kt_start_seq_get(g_context.get(), m_keytab.m_keytab, &m_cursor);
if (ret)
throw KRB5Exception("krb5_kt_start_seq_get", ret);
}
KRB5Keytab::cursor::~cursor() {
krb5_free_keytab_entry_contents(g_context.get(), &m_entry);
memset(&m_entry, 0, sizeof(m_entry));
// Tell m_princ to not free its contents!
m_princ.reset_no_free(NULL);
krb5_error_code ret = krb5_kt_end_seq_get(g_context.get(), m_keytab.m_keytab, &m_cursor);
if (ret)
// FIXME: shouldn't throw from destructor...
throw KRB5Exception("krb5_kt_end_seq_get", ret);
}
bool KRB5Keytab::cursor::next() {
krb5_free_keytab_entry_contents(g_context.get(), &m_entry);
memset(&m_entry, 0, sizeof(m_entry));
krb5_error_code ret = krb5_kt_next_entry(g_context.get(), m_keytab.m_keytab, &m_entry, &m_cursor);
m_princ.reset_no_free(m_entry.principal);
return ret == 0;
}
// GLOBAL:
KRB5Context g_context;
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