| Current Path : /usr/src/kerberos5/lib/libgssapi_krb5/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //usr/src/kerberos5/lib/libgssapi_krb5/gss_krb5.c |
/*-
* Copyright (c) 2005 Doug Rabson
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
* $FreeBSD: release/9.1.0/kerberos5/lib/libgssapi_krb5/gss_krb5.c 178828 2008-05-07 13:53:12Z dfr $
*/
#include <gssapi/gssapi.h>
#include <gssapi/gssapi_krb5.h>
/* RCSID("$Id: gss_krb5.c 21889 2007-08-09 07:43:24Z lha $"); */
#include <krb5.h>
#include <roken.h>
OM_uint32
gss_krb5_copy_ccache(OM_uint32 *minor_status,
gss_cred_id_t cred,
krb5_ccache out)
{
gss_buffer_set_t data_set = GSS_C_NO_BUFFER_SET;
krb5_context context;
krb5_error_code kret;
krb5_ccache id;
OM_uint32 ret;
char *str;
ret = gss_inquire_cred_by_oid(minor_status,
cred,
GSS_KRB5_COPY_CCACHE_X,
&data_set);
if (ret)
return ret;
if (data_set == GSS_C_NO_BUFFER_SET || data_set->count != 1) {
gss_release_buffer_set(minor_status, &data_set);
*minor_status = EINVAL;
return GSS_S_FAILURE;
}
kret = krb5_init_context(&context);
if (kret) {
*minor_status = kret;
gss_release_buffer_set(minor_status, &data_set);
return GSS_S_FAILURE;
}
kret = asprintf(&str, "%.*s", (int)data_set->elements[0].length,
(char *)data_set->elements[0].value);
gss_release_buffer_set(minor_status, &data_set);
if (kret == -1) {
*minor_status = ENOMEM;
return GSS_S_FAILURE;
}
kret = krb5_cc_resolve(context, str, &id);
free(str);
if (kret) {
*minor_status = kret;
return GSS_S_FAILURE;
}
kret = krb5_cc_copy_cache(context, id, out);
krb5_cc_close(context, id);
krb5_free_context(context);
if (kret) {
*minor_status = kret;
return GSS_S_FAILURE;
}
return ret;
}
OM_uint32
gss_krb5_import_cred(OM_uint32 *minor_status,
krb5_ccache id,
krb5_principal keytab_principal,
krb5_keytab keytab,
gss_cred_id_t *cred)
{
gss_buffer_desc buffer;
OM_uint32 major_status;
krb5_context context;
krb5_error_code ret;
krb5_storage *sp;
krb5_data data;
char *str;
*cred = GSS_C_NO_CREDENTIAL;
ret = krb5_init_context(&context);
if (ret) {
*minor_status = ret;
return GSS_S_FAILURE;
}
sp = krb5_storage_emem();
if (sp == NULL) {
*minor_status = ENOMEM;
major_status = GSS_S_FAILURE;
goto out;
}
if (id) {
ret = krb5_cc_get_full_name(context, id, &str);
if (ret == 0) {
ret = krb5_store_string(sp, str);
free(str);
}
} else
ret = krb5_store_string(sp, "");
if (ret) {
*minor_status = ret;
major_status = GSS_S_FAILURE;
goto out;
}
if (keytab_principal) {
ret = krb5_unparse_name(context, keytab_principal, &str);
if (ret == 0) {
ret = krb5_store_string(sp, str);
free(str);
}
} else
krb5_store_string(sp, "");
if (ret) {
*minor_status = ret;
major_status = GSS_S_FAILURE;
goto out;
}
if (keytab) {
ret = krb5_kt_get_full_name(context, keytab, &str);
if (ret == 0) {
ret = krb5_store_string(sp, str);
free(str);
}
} else
krb5_store_string(sp, "");
if (ret) {
*minor_status = ret;
major_status = GSS_S_FAILURE;
goto out;
}
ret = krb5_storage_to_data(sp, &data);
if (ret) {
*minor_status = ret;
major_status = GSS_S_FAILURE;
goto out;
}
buffer.value = data.data;
buffer.length = data.length;
major_status = gss_set_cred_option(minor_status,
cred,
GSS_KRB5_IMPORT_CRED_X,
&buffer);
krb5_data_free(&data);
out:
if (sp)
krb5_storage_free(sp);
krb5_free_context(context);
return major_status;
}
OM_uint32
gsskrb5_register_acceptor_identity(const char *identity)
{
gss_buffer_desc buffer;
OM_uint32 junk;
buffer.value = rk_UNCONST(identity);
buffer.length = strlen(identity);
gss_set_sec_context_option(&junk, NULL,
GSS_KRB5_REGISTER_ACCEPTOR_IDENTITY_X, &buffer);
return (GSS_S_COMPLETE);
}
OM_uint32
gsskrb5_set_dns_canonicalize(int flag)
{
gss_buffer_desc buffer;
OM_uint32 junk;
char b = (flag != 0);
buffer.value = &b;
buffer.length = sizeof(b);
gss_set_sec_context_option(&junk, NULL,
GSS_KRB5_SET_DNS_CANONICALIZE_X, &buffer);
return (GSS_S_COMPLETE);
}
static krb5_error_code
set_key(krb5_keyblock *keyblock, gss_krb5_lucid_key_t *key)
{
key->type = keyblock->keytype;
key->length = keyblock->keyvalue.length;
key->data = malloc(key->length);
if (key->data == NULL && key->length != 0)
return ENOMEM;
memcpy(key->data, keyblock->keyvalue.data, key->length);
return 0;
}
static void
free_key(gss_krb5_lucid_key_t *key)
{
memset(key->data, 0, key->length);
free(key->data);
memset(key, 0, sizeof(*key));
}
OM_uint32
gss_krb5_export_lucid_sec_context(OM_uint32 *minor_status,
gss_ctx_id_t *context_handle,
OM_uint32 version,
void **rctx)
{
krb5_context context = NULL;
krb5_error_code ret;
gss_buffer_set_t data_set = GSS_C_NO_BUFFER_SET;
OM_uint32 major_status;
gss_krb5_lucid_context_v1_t *ctx = NULL;
krb5_storage *sp = NULL;
uint32_t num;
if (context_handle == NULL
|| *context_handle == GSS_C_NO_CONTEXT
|| version != 1)
{
ret = EINVAL;
return GSS_S_FAILURE;
}
major_status =
gss_inquire_sec_context_by_oid (minor_status,
*context_handle,
GSS_KRB5_EXPORT_LUCID_CONTEXT_V1_X,
&data_set);
if (major_status)
return major_status;
if (data_set == GSS_C_NO_BUFFER_SET || data_set->count != 1) {
gss_release_buffer_set(minor_status, &data_set);
*minor_status = EINVAL;
return GSS_S_FAILURE;
}
ret = krb5_init_context(&context);
if (ret)
goto out;
ctx = calloc(1, sizeof(*ctx));
if (ctx == NULL) {
ret = ENOMEM;
goto out;
}
sp = krb5_storage_from_mem(data_set->elements[0].value,
data_set->elements[0].length);
if (sp == NULL) {
ret = ENOMEM;
goto out;
}
ret = krb5_ret_uint32(sp, &num);
if (ret) goto out;
if (num != 1) {
ret = EINVAL;
goto out;
}
ctx->version = 1;
/* initiator */
ret = krb5_ret_uint32(sp, &ctx->initiate);
if (ret) goto out;
/* endtime */
ret = krb5_ret_uint32(sp, &ctx->endtime);
if (ret) goto out;
/* send_seq */
ret = krb5_ret_uint32(sp, &num);
if (ret) goto out;
ctx->send_seq = ((uint64_t)num) << 32;
ret = krb5_ret_uint32(sp, &num);
if (ret) goto out;
ctx->send_seq |= num;
/* recv_seq */
ret = krb5_ret_uint32(sp, &num);
if (ret) goto out;
ctx->recv_seq = ((uint64_t)num) << 32;
ret = krb5_ret_uint32(sp, &num);
if (ret) goto out;
ctx->recv_seq |= num;
/* protocol */
ret = krb5_ret_uint32(sp, &ctx->protocol);
if (ret) goto out;
if (ctx->protocol == 0) {
krb5_keyblock key;
/* sign_alg */
ret = krb5_ret_uint32(sp, &ctx->rfc1964_kd.sign_alg);
if (ret) goto out;
/* seal_alg */
ret = krb5_ret_uint32(sp, &ctx->rfc1964_kd.seal_alg);
if (ret) goto out;
/* ctx_key */
ret = krb5_ret_keyblock(sp, &key);
if (ret) goto out;
ret = set_key(&key, &ctx->rfc1964_kd.ctx_key);
krb5_free_keyblock_contents(context, &key);
if (ret) goto out;
} else if (ctx->protocol == 1) {
krb5_keyblock key;
/* acceptor_subkey */
ret = krb5_ret_uint32(sp, &ctx->cfx_kd.have_acceptor_subkey);
if (ret) goto out;
/* ctx_key */
ret = krb5_ret_keyblock(sp, &key);
if (ret) goto out;
ret = set_key(&key, &ctx->cfx_kd.ctx_key);
krb5_free_keyblock_contents(context, &key);
if (ret) goto out;
/* acceptor_subkey */
if (ctx->cfx_kd.have_acceptor_subkey) {
ret = krb5_ret_keyblock(sp, &key);
if (ret) goto out;
ret = set_key(&key, &ctx->cfx_kd.acceptor_subkey);
krb5_free_keyblock_contents(context, &key);
if (ret) goto out;
}
} else {
ret = EINVAL;
goto out;
}
*rctx = ctx;
out:
gss_release_buffer_set(minor_status, &data_set);
if (sp)
krb5_storage_free(sp);
if (context)
krb5_free_context(context);
if (ret) {
if (ctx)
gss_krb5_free_lucid_sec_context(NULL, ctx);
*minor_status = ret;
return GSS_S_FAILURE;
}
*minor_status = 0;
return GSS_S_COMPLETE;
}
OM_uint32
gss_krb5_free_lucid_sec_context(OM_uint32 *minor_status, void *c)
{
gss_krb5_lucid_context_v1_t *ctx = c;
if (ctx->version != 1) {
if (minor_status)
*minor_status = 0;
return GSS_S_FAILURE;
}
if (ctx->protocol == 0) {
free_key(&ctx->rfc1964_kd.ctx_key);
} else if (ctx->protocol == 1) {
free_key(&ctx->cfx_kd.ctx_key);
if (ctx->cfx_kd.have_acceptor_subkey)
free_key(&ctx->cfx_kd.acceptor_subkey);
}
free(ctx);
if (minor_status)
*minor_status = 0;
return GSS_S_COMPLETE;
}
/*
*
*/
OM_uint32
gss_krb5_set_allowable_enctypes(OM_uint32 *minor_status,
gss_cred_id_t cred,
OM_uint32 num_enctypes,
int32_t *enctypes)
{
krb5_error_code ret;
OM_uint32 maj_status;
gss_buffer_desc buffer;
krb5_storage *sp;
krb5_data data;
int i;
sp = krb5_storage_emem();
if (sp == NULL) {
*minor_status = ENOMEM;
maj_status = GSS_S_FAILURE;
goto out;
}
for (i = 0; i < num_enctypes; i++) {
ret = krb5_store_int32(sp, enctypes[i]);
if (ret) {
*minor_status = ret;
maj_status = GSS_S_FAILURE;
goto out;
}
}
ret = krb5_storage_to_data(sp, &data);
if (ret) {
*minor_status = ret;
maj_status = GSS_S_FAILURE;
goto out;
}
buffer.value = data.data;
buffer.length = data.length;
maj_status = gss_set_cred_option(minor_status,
&cred,
GSS_KRB5_SET_ALLOWABLE_ENCTYPES_X,
&buffer);
krb5_data_free(&data);
out:
if (sp)
krb5_storage_free(sp);
return maj_status;
}
/*
*
*/
OM_uint32
gsskrb5_set_send_to_kdc(struct gsskrb5_send_to_kdc *c)
{
gss_buffer_desc buffer;
OM_uint32 junk;
if (c) {
buffer.value = c;
buffer.length = sizeof(*c);
} else {
buffer.value = NULL;
buffer.length = 0;
}
gss_set_sec_context_option(&junk, NULL,
GSS_KRB5_SEND_TO_KDC_X, &buffer);
return (GSS_S_COMPLETE);
}
/*
*
*/
OM_uint32
gss_krb5_ccache_name(OM_uint32 *minor_status,
const char *name,
const char **out_name)
{
gss_buffer_desc buffer;
OM_uint32 junk;
if (out_name)
*out_name = NULL;
buffer.value = rk_UNCONST(name);
buffer.length = strlen(name);
gss_set_sec_context_option(&junk, NULL,
GSS_KRB5_CCACHE_NAME_X, &buffer);
return (GSS_S_COMPLETE);
}
/*
*
*/
OM_uint32
gsskrb5_extract_authtime_from_sec_context(OM_uint32 *minor_status,
gss_ctx_id_t context_handle,
time_t *authtime)
{
gss_buffer_set_t data_set = GSS_C_NO_BUFFER_SET;
OM_uint32 maj_stat;
if (context_handle == GSS_C_NO_CONTEXT) {
*minor_status = EINVAL;
return GSS_S_FAILURE;
}
maj_stat =
gss_inquire_sec_context_by_oid (minor_status,
context_handle,
GSS_KRB5_GET_AUTHTIME_X,
&data_set);
if (maj_stat)
return maj_stat;
if (data_set == GSS_C_NO_BUFFER_SET) {
gss_release_buffer_set(minor_status, &data_set);
*minor_status = EINVAL;
return GSS_S_FAILURE;
}
if (data_set->count != 1) {
gss_release_buffer_set(minor_status, &data_set);
*minor_status = EINVAL;
return GSS_S_FAILURE;
}
if (data_set->elements[0].length != 4) {
gss_release_buffer_set(minor_status, &data_set);
*minor_status = EINVAL;
return GSS_S_FAILURE;
}
{
unsigned char *buf = data_set->elements[0].value;
*authtime = (buf[3] <<24) | (buf[2] << 16) |
(buf[1] << 8) | (buf[0] << 0);
}
gss_release_buffer_set(minor_status, &data_set);
*minor_status = 0;
return GSS_S_COMPLETE;
}
/*
*
*/
OM_uint32
gsskrb5_extract_authz_data_from_sec_context(OM_uint32 *minor_status,
gss_ctx_id_t context_handle,
int ad_type,
gss_buffer_t ad_data)
{
gss_buffer_set_t data_set = GSS_C_NO_BUFFER_SET;
OM_uint32 maj_stat;
gss_OID_desc oid_flat;
heim_oid baseoid, oid;
size_t size;
if (context_handle == GSS_C_NO_CONTEXT) {
*minor_status = EINVAL;
return GSS_S_FAILURE;
}
/* All this to append an integer to an oid... */
if (der_get_oid(GSS_KRB5_EXTRACT_AUTHZ_DATA_FROM_SEC_CONTEXT_X->elements,
GSS_KRB5_EXTRACT_AUTHZ_DATA_FROM_SEC_CONTEXT_X->length,
&baseoid, NULL) != 0) {
*minor_status = EINVAL;
return GSS_S_FAILURE;
}
oid.length = baseoid.length + 1;
oid.components = calloc(oid.length, sizeof(*oid.components));
if (oid.components == NULL) {
der_free_oid(&baseoid);
*minor_status = ENOMEM;
return GSS_S_FAILURE;
}
memcpy(oid.components, baseoid.components,
baseoid.length * sizeof(*baseoid.components));
der_free_oid(&baseoid);
oid.components[oid.length - 1] = ad_type;
oid_flat.length = der_length_oid(&oid);
oid_flat.elements = malloc(oid_flat.length);
if (oid_flat.elements == NULL) {
free(oid.components);
*minor_status = ENOMEM;
return GSS_S_FAILURE;
}
if (der_put_oid((unsigned char *)oid_flat.elements + oid_flat.length - 1,
oid_flat.length, &oid, &size) != 0) {
free(oid.components);
free(oid_flat.elements);
*minor_status = EINVAL;
return GSS_S_FAILURE;
}
if (oid_flat.length != size)
abort();
free(oid.components);
/* FINALLY, we have the OID */
maj_stat = gss_inquire_sec_context_by_oid (minor_status,
context_handle,
&oid_flat,
&data_set);
free(oid_flat.elements);
if (maj_stat)
return maj_stat;
if (data_set == GSS_C_NO_BUFFER_SET || data_set->count != 1) {
gss_release_buffer_set(minor_status, &data_set);
*minor_status = EINVAL;
return GSS_S_FAILURE;
}
ad_data->value = malloc(data_set->elements[0].length);
if (ad_data->value == NULL) {
gss_release_buffer_set(minor_status, &data_set);
*minor_status = ENOMEM;
return GSS_S_FAILURE;
}
ad_data->length = data_set->elements[0].length;
memcpy(ad_data->value, data_set->elements[0].value, ad_data->length);
gss_release_buffer_set(minor_status, &data_set);
*minor_status = 0;
return GSS_S_COMPLETE;
}
/*
*
*/
static OM_uint32
gsskrb5_extract_key(OM_uint32 *minor_status,
gss_ctx_id_t context_handle,
const gss_OID oid,
krb5_keyblock **keyblock)
{
krb5_error_code ret;
gss_buffer_set_t data_set = GSS_C_NO_BUFFER_SET;
OM_uint32 major_status;
krb5_context context = NULL;
krb5_storage *sp = NULL;
if (context_handle == GSS_C_NO_CONTEXT) {
ret = EINVAL;
return GSS_S_FAILURE;
}
ret = krb5_init_context(&context);
if(ret) {
*minor_status = ret;
return GSS_S_FAILURE;
}
major_status =
gss_inquire_sec_context_by_oid (minor_status,
context_handle,
oid,
&data_set);
if (major_status)
return major_status;
if (data_set == GSS_C_NO_BUFFER_SET || data_set->count != 1) {
gss_release_buffer_set(minor_status, &data_set);
*minor_status = EINVAL;
return GSS_S_FAILURE;
}
sp = krb5_storage_from_mem(data_set->elements[0].value,
data_set->elements[0].length);
if (sp == NULL) {
ret = ENOMEM;
goto out;
}
*keyblock = calloc(1, sizeof(**keyblock));
if (keyblock == NULL) {
ret = ENOMEM;
goto out;
}
ret = krb5_ret_keyblock(sp, *keyblock);
out:
gss_release_buffer_set(minor_status, &data_set);
if (sp)
krb5_storage_free(sp);
if (ret && keyblock) {
krb5_free_keyblock(context, *keyblock);
*keyblock = NULL;
}
if (context)
krb5_free_context(context);
*minor_status = ret;
if (ret)
return GSS_S_FAILURE;
return GSS_S_COMPLETE;
}
/*
*
*/
OM_uint32
gsskrb5_extract_service_keyblock(OM_uint32 *minor_status,
gss_ctx_id_t context_handle,
krb5_keyblock **keyblock)
{
return gsskrb5_extract_key(minor_status,
context_handle,
GSS_KRB5_GET_SERVICE_KEYBLOCK_X,
keyblock);
}
OM_uint32
gsskrb5_get_initiator_subkey(OM_uint32 *minor_status,
gss_ctx_id_t context_handle,
krb5_keyblock **keyblock)
{
return gsskrb5_extract_key(minor_status,
context_handle,
GSS_KRB5_GET_INITIATOR_SUBKEY_X,
keyblock);
}
OM_uint32
gsskrb5_get_subkey(OM_uint32 *minor_status,
gss_ctx_id_t context_handle,
krb5_keyblock **keyblock)
{
return gsskrb5_extract_key(minor_status,
context_handle,
GSS_KRB5_GET_SUBKEY_X,
keyblock);
}
OM_uint32
gsskrb5_set_default_realm(const char *realm)
{
gss_buffer_desc buffer;
OM_uint32 junk;
buffer.value = rk_UNCONST(realm);
buffer.length = strlen(realm);
gss_set_sec_context_option(&junk, NULL,
GSS_KRB5_SET_DEFAULT_REALM_X, &buffer);
return (GSS_S_COMPLETE);
}
OM_uint32
gss_krb5_get_tkt_flags(OM_uint32 *minor_status,
gss_ctx_id_t context_handle,
OM_uint32 *tkt_flags)
{
OM_uint32 major_status;
gss_buffer_set_t data_set = GSS_C_NO_BUFFER_SET;
if (context_handle == GSS_C_NO_CONTEXT) {
*minor_status = EINVAL;
return GSS_S_FAILURE;
}
major_status =
gss_inquire_sec_context_by_oid (minor_status,
context_handle,
GSS_KRB5_GET_TKT_FLAGS_X,
&data_set);
if (major_status)
return major_status;
if (data_set == GSS_C_NO_BUFFER_SET ||
data_set->count != 1 ||
data_set->elements[0].length < 4) {
gss_release_buffer_set(minor_status, &data_set);
*minor_status = EINVAL;
return GSS_S_FAILURE;
}
{
const u_char *p = data_set->elements[0].value;
*tkt_flags = (p[0] << 0) | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
}
gss_release_buffer_set(minor_status, &data_set);
return GSS_S_COMPLETE;
}