63d1d155f2
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@24083 ec53bebd-3082-4978-b11e-865c3cabbd6b
264 lines
7.3 KiB
C
264 lines
7.3 KiB
C
/*
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* Copyright (c) 2008 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "krb5/gsskrb5_locl.h"
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#include <roken.h>
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static OM_uint32
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iov_allocate(OM_uint32 *minor_status, gss_iov_buffer_desc *iov, int iov_count)
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{
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unsigned int i;
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for (i = 0; i < iov_count; i++) {
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if (iov[i].flags & GSS_IOV_BUFFER_FLAG_ALLOCATE) {
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void *ptr = malloc(iov[i].buffer.length);
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if (ptr == NULL)
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abort();
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memcpy(ptr, iov[i].buffer.value, iov[i].buffer.length);
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iov[i].buffer.value = ptr;
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iov[i].flags |= GSS_IOV_BUFFER_FLAG_ALLOCATED;
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}
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}
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return GSS_S_COMPLETE;
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}
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static OM_uint32
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iov_map(OM_uint32 *minor_status, int iov_count,
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const gss_iov_buffer_desc *iov,
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krb5_crypto_iov *data)
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{
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unsigned int i;
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for (i = 0; i < iov_count; i++) {
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switch(iov[i].type) {
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case GSS_IOV_BUFFER_TYPE_EMPTY:
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data[i].flags = KRB5_CRYPTO_TYPE_EMPTY;
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break;
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case GSS_IOV_BUFFER_TYPE_DATA:
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if (iov[i].flags & GSS_IOV_BUFFER_FLAG_SIGN_ONLY)
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data[i].flags = KRB5_CRYPTO_TYPE_SIGN_ONLY;
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else
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data[i].flags = KRB5_CRYPTO_TYPE_DATA;
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break;
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case GSS_IOV_BUFFER_TYPE_HEADER:
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data[i].flags = KRB5_CRYPTO_TYPE_HEADER;
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break;
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case GSS_IOV_BUFFER_TYPE_TRAILER:
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data[i].flags = KRB5_CRYPTO_TYPE_TRAILER;
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break;
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case GSS_IOV_BUFFER_TYPE_PADDING:
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data[i].flags = KRB5_CRYPTO_TYPE_PADDING;
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break;
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case GSS_IOV_BUFFER_TYPE_STREAM:
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abort();
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break;
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default:
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*minor_status = EINVAL;
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return GSS_S_FAILURE;
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}
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data[i].data.data = iov[i].buffer.value;
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data[i].data.length = iov[i].buffer.length;
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}
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return GSS_S_COMPLETE;
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}
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OM_uint32 GSSAPI_LIB_FUNCTION
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_gk_wrap_iov(OM_uint32 * minor_status,
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gss_ctx_id_t context_handle,
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int conf_req_flag,
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gss_qop_t qop_req,
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int * conf_state,
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int iov_count,
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gss_iov_buffer_desc *iov)
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{
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gsskrb5_ctx ctx = (gsskrb5_ctx) context_handle;
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krb5_crypto crypto = NULL;
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krb5_context context;
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OM_uint32 major_status, junk;
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krb5_crypto_iov *data;
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unsigned usage;
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GSSAPI_KRB5_INIT (&context);
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major_status = iov_allocate(minor_status, iov, iov_count);
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if (major_status != GSS_S_COMPLETE)
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return major_status;
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data = calloc(iov_count, sizeof(data[0]));
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if (data == NULL) {
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gss_release_iov_buffer(&junk, iov_count, iov);
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*minor_status = ENOMEM;
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return GSS_S_FAILURE;
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}
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major_status = iov_map(minor_status, iov_count, iov, data);
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if (major_status != GSS_S_COMPLETE) {
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gss_release_iov_buffer(&junk, iov_count, iov);
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free(data);
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return major_status;
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}
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if (ctx->more_flags & LOCAL) {
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usage = KRB5_KU_USAGE_ACCEPTOR_SIGN;
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} else {
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usage = KRB5_KU_USAGE_INITIATOR_SIGN;
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}
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*minor_status = krb5_encrypt_iov_ivec(context, crypto, usage,
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data, iov_count, NULL);
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free(data);
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if (major_status != GSS_S_COMPLETE) {
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gss_release_iov_buffer(&junk, iov_count, iov);
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return major_status;
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}
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*minor_status = 0;
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return GSS_S_COMPLETE;
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}
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OM_uint32 GSSAPI_LIB_FUNCTION
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_gk_unwrap_iov(OM_uint32 *minor_status,
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gss_ctx_id_t context_handle,
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int *conf_state,
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gss_qop_t *qop_state,
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int iov_count,
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gss_iov_buffer_desc *iov)
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{
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gsskrb5_ctx ctx = (gsskrb5_ctx) context_handle;
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krb5_crypto crypto = NULL;
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krb5_context context;
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OM_uint32 major_status, junk;
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krb5_crypto_iov *data;
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unsigned usage;
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GSSAPI_KRB5_INIT (&context);
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major_status = iov_allocate(minor_status, iov, iov_count);
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if (major_status != GSS_S_COMPLETE)
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return major_status;
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data = calloc(iov_count, sizeof(data[0]));
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if (data == NULL) {
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gss_release_iov_buffer(&junk, iov_count, iov);
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*minor_status = ENOMEM;
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return GSS_S_FAILURE;
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}
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major_status = iov_map(minor_status, iov_count, iov, data);
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if (major_status != GSS_S_COMPLETE) {
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gss_release_iov_buffer(&junk, iov_count, iov);
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free(data);
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return major_status;
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}
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if (ctx->more_flags & LOCAL) {
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usage = KRB5_KU_USAGE_INITIATOR_SIGN;
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} else {
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usage = KRB5_KU_USAGE_ACCEPTOR_SIGN;
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}
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*minor_status = krb5_decrypt_iov_ivec(context, crypto, usage,
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data, iov_count, NULL);
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free(data);
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if (major_status != GSS_S_COMPLETE) {
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gss_release_iov_buffer(&junk, iov_count, iov);
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return major_status;
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}
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*minor_status = 0;
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return GSS_S_COMPLETE;
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}
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OM_uint32 GSSAPI_LIB_FUNCTION
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_gk_wrap_iov_length(OM_uint32 * minor_status,
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gss_ctx_id_t context_handle,
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int conf_req_flag,
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gss_qop_t qop_req,
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int iov_count,
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gss_iov_buffer_desc *iov)
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{
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krb5_context context;
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krb5_crypto crypto = NULL;
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unsigned int i;
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size_t size;
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size_t *padding = NULL;
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GSSAPI_KRB5_INIT (&context);
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*minor_status = 0;
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for (size = 0, i = 0; i < iov_count; i++) {
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switch(iov[i].type) {
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case GSS_IOV_BUFFER_TYPE_EMPTY:
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break;
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case GSS_IOV_BUFFER_TYPE_DATA:
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size += iov[i].buffer.length;
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break;
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case GSS_IOV_BUFFER_TYPE_HEADER:
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iov[i].buffer.length =
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krb5_crypto_length(context, crypto, KRB5_CRYPTO_TYPE_HEADER);
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size += iov[i].buffer.length;
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break;
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case GSS_IOV_BUFFER_TYPE_TRAILER:
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iov[i].buffer.length =
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krb5_crypto_length(context, crypto, KRB5_CRYPTO_TYPE_TRAILER);
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size += iov[i].buffer.length;
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break;
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case GSS_IOV_BUFFER_TYPE_PADDING:
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if (padding != NULL) {
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*minor_status = 0;
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return GSS_S_FAILURE;
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}
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padding = &iov[i].buffer.length;
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break;
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case GSS_IOV_BUFFER_TYPE_STREAM:
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size += iov[i].buffer.length;
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break;
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default:
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*minor_status = EINVAL;
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return GSS_S_FAILURE;
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}
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}
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if (padding) {
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size_t pad = krb5_crypto_length(context, crypto, KRB5_CRYPTO_TYPE_PADDING);
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if (pad > 1) {
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*padding = pad - (size % pad);
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if (*padding == pad)
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*padding = 0;
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} else
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*padding = 0;
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}
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return GSS_S_COMPLETE;
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}
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