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/*
* Copyright (c) 2003 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_locl.h"
RCSID("$Id: mit_glue.c,v 1.12 2006/11/17 22:17:46 lha Exp $");
/*
* Glue for MIT API
*/
krb5_error_code KRB5_LIB_FUNCTION
krb5_c_make_checksum(krb5_context context,
krb5_cksumtype cksumtype,
const krb5_keyblock *key,
krb5_keyusage usage,
const krb5_data *input,
krb5_checksum *cksum)
{
krb5_error_code ret;
krb5_crypto crypto;
ret = krb5_crypto_init(context, key, 0, &crypto);
if (ret)
return ret;
ret = krb5_create_checksum(context, crypto, usage, cksumtype,
input->data, input->length, cksum);
krb5_crypto_destroy(context, crypto);
return ret ;
}
krb5_error_code KRB5_LIB_FUNCTION
krb5_c_verify_checksum(krb5_context context, const krb5_keyblock *key,
krb5_keyusage usage, const krb5_data *data,
const krb5_checksum *cksum, krb5_boolean *valid)
{
krb5_error_code ret;
krb5_checksum data_cksum;
*valid = 0;
ret = krb5_c_make_checksum(context, cksum->cksumtype,
key, usage, data, &data_cksum);
if (ret)
return ret;
if (data_cksum.cksumtype == cksum->cksumtype
&& data_cksum.checksum.length == cksum->checksum.length
&& memcmp(data_cksum.checksum.data, cksum->checksum.data, cksum->checksum.length) == 0)
*valid = 1;
krb5_free_checksum_contents(context, &data_cksum);
return 0;
}
krb5_error_code KRB5_LIB_FUNCTION
krb5_c_get_checksum(krb5_context context, const krb5_checksum *cksum,
krb5_cksumtype *type, krb5_data **data)
{
krb5_error_code ret;
if (type)
*type = cksum->cksumtype;
if (data) {
*data = malloc(sizeof(**data));
if (*data == NULL)
return ENOMEM;
ret = der_copy_octet_string(&cksum->checksum, *data);
if (ret) {
free(*data);
*data = NULL;
return ret;
}
}
return 0;
}
krb5_error_code KRB5_LIB_FUNCTION
krb5_c_set_checksum(krb5_context context, krb5_checksum *cksum,
krb5_cksumtype type, const krb5_data *data)
{
cksum->cksumtype = type;
return der_copy_octet_string(data, &cksum->checksum);
}
void KRB5_LIB_FUNCTION
krb5_free_checksum (krb5_context context, krb5_checksum *cksum)
{
krb5_checksum_free(context, cksum);
free(cksum);
}
void KRB5_LIB_FUNCTION
krb5_free_checksum_contents(krb5_context context, krb5_checksum *cksum)
{
krb5_checksum_free(context, cksum);
memset(cksum, 0, sizeof(*cksum));
}
void KRB5_LIB_FUNCTION
krb5_checksum_free(krb5_context context, krb5_checksum *cksum)
{
free_Checksum(cksum);
}
krb5_boolean KRB5_LIB_FUNCTION
krb5_c_valid_enctype (krb5_enctype etype)
{
return krb5_enctype_valid(NULL, etype);
}
krb5_boolean KRB5_LIB_FUNCTION
krb5_c_valid_cksumtype(krb5_cksumtype ctype)
{
return krb5_cksumtype_valid(NULL, ctype);
}
krb5_boolean KRB5_LIB_FUNCTION
krb5_c_is_coll_proof_cksum(krb5_cksumtype ctype)
{
return krb5_checksum_is_collision_proof(NULL, ctype);
}
krb5_boolean KRB5_LIB_FUNCTION
krb5_c_is_keyed_cksum(krb5_cksumtype ctype)
{
return krb5_checksum_is_keyed(NULL, ctype);
}
krb5_error_code KRB5_LIB_FUNCTION
krb5_copy_checksum (krb5_context context,
const krb5_checksum *old,
krb5_checksum **new)
{
*new = malloc(sizeof(**new));
if (*new == NULL)
return ENOMEM;
return copy_Checksum(old, *new);
}
krb5_error_code KRB5_LIB_FUNCTION
krb5_c_checksum_length (krb5_context context, krb5_cksumtype cksumtype,
size_t *length)
{
return krb5_checksumsize(context, cksumtype, length);
}
krb5_error_code KRB5_LIB_FUNCTION
krb5_c_block_size(krb5_context context,
krb5_enctype enctype,
size_t *blocksize)
{
krb5_error_code ret;
krb5_crypto crypto;
krb5_keyblock key;
ret = krb5_generate_random_keyblock(context, enctype, &key);
if (ret)
return ret;
ret = krb5_crypto_init(context, &key, 0, &crypto);
krb5_free_keyblock_contents(context, &key);
if (ret)
return ret;
ret = krb5_crypto_getblocksize(context, crypto, blocksize);
krb5_crypto_destroy(context, crypto);
return ret;
}
krb5_error_code KRB5_LIB_FUNCTION
krb5_c_decrypt(krb5_context context,
const krb5_keyblock key,
krb5_keyusage usage,
const krb5_data *ivec,
krb5_enc_data *input,
krb5_data *output)
{
krb5_error_code ret;
krb5_crypto crypto;
ret = krb5_crypto_init(context, &key, input->enctype, &crypto);
if (ret)
return ret;
if (ivec) {
size_t blocksize;
ret = krb5_crypto_getblocksize(context, crypto, &blocksize);
if (ret) {
krb5_crypto_destroy(context, crypto);
return ret;
}
if (blocksize > ivec->length) {
krb5_crypto_destroy(context, crypto);
return KRB5_BAD_MSIZE;
}
}
ret = krb5_decrypt_ivec(context, crypto, usage,
input->ciphertext.data, input->ciphertext.length,
output,
ivec ? ivec->data : NULL);
krb5_crypto_destroy(context, crypto);
return ret ;
}
krb5_error_code KRB5_LIB_FUNCTION
krb5_c_encrypt(krb5_context context,
const krb5_keyblock *key,
krb5_keyusage usage,
const krb5_data *ivec,
const krb5_data *input,
krb5_enc_data *output)
{
krb5_error_code ret;
krb5_crypto crypto;
ret = krb5_crypto_init(context, key, 0, &crypto);
if (ret)
return ret;
if (ivec) {
size_t blocksize;
ret = krb5_crypto_getblocksize(context, crypto, &blocksize);
if (ret) {
krb5_crypto_destroy(context, crypto);
return ret;
}
if (blocksize > ivec->length) {
krb5_crypto_destroy(context, crypto);
return KRB5_BAD_MSIZE;
}
}
ret = krb5_encrypt_ivec(context, crypto, usage,
input->data, input->length,
&output->ciphertext,
ivec ? ivec->data : NULL);
output->kvno = 0;
krb5_crypto_getenctype(context, crypto, &output->enctype);
krb5_crypto_destroy(context, crypto);
return ret ;
}
krb5_error_code KRB5_LIB_FUNCTION
krb5_c_encrypt_length(krb5_context context,
krb5_enctype enctype,
size_t inputlen,
size_t *length)
{
krb5_error_code ret;
krb5_crypto crypto;
krb5_keyblock key;
ret = krb5_generate_random_keyblock(context, enctype, &key);
if (ret)
return ret;
ret = krb5_crypto_init(context, &key, 0, &crypto);
krb5_free_keyblock_contents(context, &key);
if (ret)
return ret;
*length = krb5_get_wrapped_length(context, crypto, inputlen);
krb5_crypto_destroy(context, crypto);
return 0;
}
krb5_error_code KRB5_LIB_FUNCTION
krb5_c_enctype_compare(krb5_context context,
krb5_enctype e1,
krb5_enctype e2,
krb5_boolean *similar)
{
*similar = krb5_enctypes_compatible_keys(context, e1, e2);
return 0;
}
krb5_error_code KRB5_LIB_FUNCTION
krb5_c_make_random_key(krb5_context context,
krb5_enctype enctype,
krb5_keyblock *random_key)
{
return krb5_generate_random_keyblock(context, enctype, random_key);
}
krb5_error_code KRB5_LIB_FUNCTION
krb5_c_keylengths(krb5_context context,
krb5_enctype enctype,
size_t *ilen,
size_t *keylen)
{
krb5_error_code ret;
ret = krb5_enctype_keybits(context, enctype, ilen);
if (ret)
return ret;
*ilen = (*ilen + 7) / 8;
return krb5_enctype_keysize(context, enctype, keylen);
}
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