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implement the new gss_*_iov interfaces

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git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@24055 ec53bebd-3082-4978-b11e-865c3cabbd6b
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Love Hörnquist Åstrand
2008-12-11 04:49:37 +00:00
parent 9880969de0
commit 7f6d448621
8 changed files with 472 additions and 8 deletions
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259
lib/gssapi/krb5/aeap.c Normal file
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/*
* Copyright (c) 2008 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 "krb5/gsskrb5_locl.h"
#include <roken.h>
static OM_uint32
iov_allocate(OM_uint32 *minor_status, gss_iov_buffer_desc *iov, size_t iov_count)
{
unsigned int i;
for (i = 0; i < iov_count; i++) {
if (iov[i].flags & GSS_IOV_BUFFER_FLAG_ALLOCATE) {
void *ptr = malloc(iov[i].buffer.length);
if (ptr == NULL)
abort();
memcpy(ptr, iov[i].buffer.value, iov[i].buffer.length);
iov[i].buffer.value = ptr;
iov[i].flags |= GSS_IOV_BUFFER_FLAG_ALLOCATED;
}
}
return GSS_S_COMPLETE;
}
static OM_uint32
iov_map(OM_uint32 *minor_status, size_t iov_count,
const gss_iov_buffer_desc *iov,
krb5_crypto_iov *data)
{
unsigned int i;
for (i = 0; i < iov_count; i++) {
switch(iov[i].type) {
case GSS_IOV_BUFFER_TYPE_EMPTY:
data[i].flags = KRB5_CRYPTO_TYPE_EMPTY;
break;
case GSS_IOV_BUFFER_TYPE_DATA:
if (iov[i].flags & GSS_IOV_BUFFER_FLAG_SIGN_ONLY)
data[i].flags = KRB5_CRYPTO_TYPE_SIGN_ONLY;
else
data[i].flags = KRB5_CRYPTO_TYPE_DATA;
break;
case GSS_IOV_BUFFER_TYPE_HEADER:
data[i].flags = KRB5_CRYPTO_TYPE_HEADER;
break;
case GSS_IOV_BUFFER_TYPE_TRAILER:
data[i].flags = KRB5_CRYPTO_TYPE_TRAILER;
break;
case GSS_IOV_BUFFER_TYPE_PADDING:
data[i].flags = KRB5_CRYPTO_TYPE_PADDING;
break;
case GSS_IOV_BUFFER_TYPE_STREAM:
abort();
break;
default:
*minor_status = EINVAL;
return GSS_S_FAILURE;
}
data[i].data.data = iov[i].buffer.value;
data[i].data.length = iov[i].buffer.length;
}
return GSS_S_COMPLETE;
}
OM_uint32 GSSAPI_LIB_FUNCTION
_gk_wrap_iov(OM_uint32 * minor_status,
gss_ctx_id_t context_handle,
int conf_req_flag,
gss_qop_t qop_req,
int * conf_state,
size_t iov_count,
gss_iov_buffer_desc *iov)
{
gsskrb5_ctx ctx = (gsskrb5_ctx) context_handle;
krb5_crypto crypto = NULL;
krb5_context context;
OM_uint32 major_status, junk;
krb5_crypto_iov *data;
unsigned usage;
GSSAPI_KRB5_INIT (&context);
major_status = iov_allocate(minor_status, iov, iov_count);
if (major_status != GSS_S_COMPLETE)
return major_status;
data = calloc(iov_count, sizeof(data[0]));
if (data == NULL) {
gss_release_iov_buffer(&junk, iov_count, iov);
*minor_status = ENOMEM;
return GSS_S_FAILURE;
}
major_status = iov_map(minor_status, iov_count, iov, data);
if (major_status != GSS_S_COMPLETE) {
gss_release_iov_buffer(&junk, iov_count, iov);
free(data);
return major_status;
}
if (ctx->more_flags & LOCAL) {
usage = KRB5_KU_USAGE_ACCEPTOR_SIGN;
} else {
usage = KRB5_KU_USAGE_INITIATOR_SIGN;
}
*minor_status = krb5_encrypt_iov_ivec(context, crypto, usage,
data, iov_count, NULL);
free(data);
if (major_status != GSS_S_COMPLETE) {
gss_release_iov_buffer(&junk, iov_count, iov);
return major_status;
}
*minor_status = 0;
return GSS_S_COMPLETE;
}
OM_uint32 GSSAPI_LIB_FUNCTION
_gk_unwrap_iov(OM_uint32 *minor_status,
gss_ctx_id_t context_handle,
int *conf_state,
gss_qop_t *qop_state,
size_t iov_count,
gss_iov_buffer_desc *iov)
{
gsskrb5_ctx ctx = (gsskrb5_ctx) context_handle;
krb5_crypto crypto = NULL;
krb5_context context;
OM_uint32 major_status, junk;
krb5_crypto_iov *data;
unsigned usage;
GSSAPI_KRB5_INIT (&context);
major_status = iov_allocate(minor_status, iov, iov_count);
if (major_status != GSS_S_COMPLETE)
return major_status;
data = calloc(iov_count, sizeof(data[0]));
if (data == NULL) {
gss_release_iov_buffer(&junk, iov_count, iov);
*minor_status = ENOMEM;
return GSS_S_FAILURE;
}
major_status = iov_map(minor_status, iov_count, iov, data);
if (major_status != GSS_S_COMPLETE) {
gss_release_iov_buffer(&junk, iov_count, iov);
free(data);
return major_status;
}
if (ctx->more_flags & LOCAL) {
usage = KRB5_KU_USAGE_INITIATOR_SIGN;
} else {
usage = KRB5_KU_USAGE_ACCEPTOR_SIGN;
}
*minor_status = krb5_decrypt_iov_ivec(context, crypto, usage,
data, iov_count, NULL);
free(data);
if (major_status != GSS_S_COMPLETE) {
gss_release_iov_buffer(&junk, iov_count, iov);
return major_status;
}
*minor_status = 0;
return GSS_S_COMPLETE;
}
OM_uint32 GSSAPI_LIB_FUNCTION
_gk_wrap_iov_length(OM_uint32 * minor_status,
gss_ctx_id_t context_handle,
int conf_req_flag,
gss_qop_t qop_req,
size_t iov_count,
gss_iov_buffer_desc *iov)
{
krb5_context context;
krb5_crypto crypto = NULL;
unsigned int i;
size_t size;
size_t *padding = NULL;
GSSAPI_KRB5_INIT (&context);
*minor_status = 0;
for (size = 0, i = 0; i < iov_count; i++) {
switch(iov[i].type) {
case GSS_IOV_BUFFER_TYPE_EMPTY:
break;
case GSS_IOV_BUFFER_TYPE_DATA:
size += iov[i].buffer.length;
break;
case GSS_IOV_BUFFER_TYPE_HEADER:
size += krb5_crypto_length(context, crypto, KRB5_CRYPTO_TYPE_HEADER);
break;
case GSS_IOV_BUFFER_TYPE_TRAILER:
size += krb5_crypto_length(context, crypto, KRB5_CRYPTO_TYPE_TRAILER);
break;
case GSS_IOV_BUFFER_TYPE_PADDING:
if (padding != NULL) {
*minor_status = 0;
return GSS_S_FAILURE;
}
padding = &iov[i].buffer.length;
break;
case GSS_IOV_BUFFER_TYPE_STREAM:
size += iov[i].buffer.length;
break;
default:
*minor_status = EINVAL;
return GSS_S_FAILURE;
}
}
if (padding) {
size_t pad = krb5_crypto_length(context, crypto, KRB5_CRYPTO_TYPE_PADDING);
if (pad > 1) {
*padding = pad - (size % pad);
if (*padding == pad)
*padding = 0;
} else
*padding = 0;
}
return GSS_S_COMPLETE;
}