/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
* Copyright (C) 1998 by the FundsXpress, INC.
*
* All rights reserved.
*
* Export of this software from the United States of America may require
* a specific license from the United States Government. It is the
* responsibility of any person or organization contemplating export to
* obtain such a license before exporting.
*
* WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
* distribute this software and its documentation for any purpose and
* without fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright notice and
* this permission notice appear in supporting documentation, and that
* the name of FundsXpress. not be used in advertising or publicity pertaining
* to distribution of the software without specific, written prior
* permission. FundsXpress makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#include "crypto_int.h"
/*
* The following functions were removed from the API in krb5 1.3 but
* still need to be exported for ABI compatibility. The other
* functions defined in this file are still in the API (and thus
* prototyped in krb5.hin) but are deprecated.
*/
krb5_boolean KRB5_CALLCONV valid_enctype(krb5_enctype ktype);
krb5_boolean KRB5_CALLCONV valid_cksumtype(krb5_cksumtype ctype);
krb5_boolean KRB5_CALLCONV is_coll_proof_cksum(krb5_cksumtype ctype);
krb5_boolean KRB5_CALLCONV is_keyed_cksum(krb5_cksumtype ctype);
krb5_error_code KRB5_CALLCONV krb5_random_confounder(size_t, krb5_pointer);
krb5_error_code krb5_encrypt_data(krb5_context context, krb5_keyblock *key,
krb5_pointer ivec, krb5_data *data,
krb5_enc_data *enc_data);
krb5_error_code krb5_decrypt_data(krb5_context context, krb5_keyblock *key,
krb5_pointer ivec, krb5_enc_data *data,
krb5_data *enc_data);
krb5_error_code KRB5_CALLCONV
krb5_encrypt(krb5_context context, krb5_const_pointer inptr,
krb5_pointer outptr, size_t size, krb5_encrypt_block *eblock,
krb5_pointer ivec)
{
krb5_data inputd, ivecd;
krb5_enc_data outputd;
size_t blocksize, outlen;
krb5_error_code ret;
if (ivec) {
ret = krb5_c_block_size(context, eblock->key->enctype, &blocksize);
if (ret)
return ret;
ivecd = make_data(ivec, blocksize);
}
/* size is the length of the input cleartext data. */
inputd = make_data((void *) inptr, size);
/*
* The size of the output buffer isn't part of the old api. Not too
* safe. So, we assume here that it's big enough.
*/
ret = krb5_c_encrypt_length(context, eblock->key->enctype, size, &outlen);
if (ret)
return ret;
outputd.ciphertext = make_data(outptr, outlen);
return krb5_c_encrypt(context, eblock->key, 0, ivec ? &ivecd : 0,
&inputd, &outputd);
}
krb5_error_code KRB5_CALLCONV
krb5_decrypt(krb5_context context, krb5_const_pointer inptr,
krb5_pointer outptr, size_t size, krb5_encrypt_block *eblock,
krb5_pointer ivec)
{
krb5_enc_data inputd;
krb5_data outputd, ivecd;
size_t blocksize;
krb5_error_code ret;
if (ivec) {
ret = krb5_c_block_size(context, eblock->key->enctype, &blocksize);
if (ret)
return ret;
ivecd = make_data(ivec, blocksize);
}
/* size is the length of the input ciphertext data */
inputd.enctype = eblock->key->enctype;
inputd.ciphertext = make_data((void *) inptr, size);
/* we don't really know how big this is, but the code tends to assume
that the output buffer size should be the same as the input
buffer size */
outputd = make_data(outptr, size);
return krb5_c_decrypt(context, eblock->key, 0, ivec ? &ivecd : 0,
&inputd, &outputd);
}
krb5_error_code KRB5_CALLCONV
krb5_process_key(krb5_context context, krb5_encrypt_block *eblock,
const krb5_keyblock *key)
{
eblock->key = (krb5_keyblock *) key;
return 0;
}
krb5_error_code KRB5_CALLCONV
krb5_finish_key(krb5_context context, krb5_encrypt_block *eblock)
{
return 0;
}
krb5_error_code KRB5_CALLCONV
krb5_string_to_key(krb5_context context, const krb5_encrypt_block *eblock,
krb5_keyblock *keyblock, const krb5_data *data,
const krb5_data *salt)
{
return krb5_c_string_to_key(context, eblock->crypto_entry, data, salt,
keyblock);
}
krb5_error_code KRB5_CALLCONV
krb5_init_random_key(krb5_context context, const krb5_encrypt_block *eblock,
const krb5_keyblock *keyblock, krb5_pointer *ptr)
{
krb5_data data = make_data(keyblock->contents, keyblock->length);
return krb5_c_random_seed(context, &data);
}
krb5_error_code KRB5_CALLCONV
krb5_finish_random_key(krb5_context context, const krb5_encrypt_block *eblock,
krb5_pointer *ptr)
{
return 0;
}
krb5_error_code KRB5_CALLCONV
krb5_random_key(krb5_context context, const krb5_encrypt_block *eblock,
krb5_pointer ptr, krb5_keyblock **keyblock)
{
krb5_keyblock *key;
krb5_error_code ret;
*keyblock = NULL;
key = malloc(sizeof(krb5_keyblock));
if (key == NULL)
return ENOMEM;
ret = krb5_c_make_random_key(context, eblock->crypto_entry, key);
if (ret) {
free(key);
return ret;
}
*keyblock = key;
return(ret);
}
krb5_enctype KRB5_CALLCONV
krb5_eblock_enctype(krb5_context context, const krb5_encrypt_block *eblock)
{
return eblock->crypto_entry;
}
krb5_error_code KRB5_CALLCONV
krb5_use_enctype(krb5_context context, krb5_encrypt_block *eblock,
krb5_enctype enctype)
{
eblock->crypto_entry = enctype;
return 0;
}
size_t KRB5_CALLCONV
krb5_encrypt_size(size_t length, krb5_enctype crypto)
{
size_t ret;
if (krb5_c_encrypt_length(NULL, crypto, length, &ret))
return (size_t) -1; /* XXX */
return ret;
}
size_t KRB5_CALLCONV
krb5_checksum_size(krb5_context context, krb5_cksumtype ctype)
{
size_t ret;
if (krb5_c_checksum_length(context, ctype, &ret))
return (size_t) -1; /* XXX */
return ret;
}
/* Guess the enctype for an untyped key used with checksum type ctype. */
static krb5_enctype
guess_enctype(krb5_cksumtype ctype)
{
const struct krb5_cksumtypes *ctp;
int i;
if (ctype == CKSUMTYPE_HMAC_MD5_ARCFOUR)
return ENCTYPE_ARCFOUR_HMAC;
ctp = find_cksumtype(ctype);
if (ctp == NULL || ctp->enc == NULL)
return 0;
for (i = 0; i < krb5int_enctypes_length; i++) {
if (krb5int_enctypes_list[i].enc == ctp->enc)
return i;
}
return 0;
}
krb5_error_code KRB5_CALLCONV
krb5_calculate_checksum(krb5_context context, krb5_cksumtype ctype,
krb5_const_pointer in, size_t in_length,
krb5_const_pointer seed, size_t seed_length,
krb5_checksum *outcksum)
{
krb5_data input = make_data((void *) in, in_length);
krb5_keyblock keyblock, *kptr = NULL;
krb5_error_code ret;
krb5_checksum cksum;
if (seed != NULL) {
keyblock.enctype = guess_enctype(ctype);
keyblock.length = seed_length;
keyblock.contents = (unsigned char *) seed;
kptr = &keyblock;
}
ret = krb5_c_make_checksum(context, ctype, kptr, 0, &input, &cksum);
if (ret)
return ret;
if (outcksum->length < cksum.length) {
memset(cksum.contents, 0, cksum.length);
free(cksum.contents);
return KRB5_BAD_MSIZE;
}
outcksum->magic = cksum.magic;
outcksum->checksum_type = cksum.checksum_type;
memcpy(outcksum->contents, cksum.contents, cksum.length);
outcksum->length = cksum.length;
free(cksum.contents);
return(0);
}
krb5_error_code KRB5_CALLCONV
krb5_verify_checksum(krb5_context context, krb5_cksumtype ctype,
const krb5_checksum *cksum, krb5_const_pointer in,
size_t in_length, krb5_const_pointer seed,
size_t seed_length)
{
krb5_data input = make_data((void *) in, in_length);
krb5_keyblock keyblock, *kptr = NULL;
krb5_error_code ret;
krb5_boolean valid;
if (seed != NULL) {
keyblock.enctype = guess_enctype(ctype);
keyblock.length = seed_length;
keyblock.contents = (unsigned char *) seed;
kptr = &keyblock;
}
ret = krb5_c_verify_checksum(context, kptr, 0, &input, cksum, &valid);
if (ret)
return ret;
if (!valid)
return KRB5KRB_AP_ERR_BAD_INTEGRITY;
return 0;
}
krb5_error_code KRB5_CALLCONV
krb5_random_confounder(size_t size, krb5_pointer ptr)
{
krb5_data random_data = make_data(ptr, size);
return krb5_c_random_make_octets(NULL, &random_data);
}
krb5_error_code krb5_encrypt_data(krb5_context context, krb5_keyblock *key,
krb5_pointer ivec, krb5_data *data,
krb5_enc_data *enc_data)
{
krb5_error_code ret;
size_t enclen, blocksize;
krb5_data ivecd;
ret = krb5_c_encrypt_length(context, key->enctype, data->length, &enclen);
if (ret)
return ret;
if (ivec) {
ret = krb5_c_block_size(context, key->enctype, &blocksize);
if (ret)
return ret;
ivecd = make_data(ivec, blocksize);
}
enc_data->magic = KV5M_ENC_DATA;
enc_data->kvno = 0;
enc_data->enctype = key->enctype;
ret = alloc_data(&enc_data->ciphertext, enclen);
if (ret)
return ret;
ret = krb5_c_encrypt(context, key, 0, ivec ? &ivecd : 0, data, enc_data);
if (ret)
free(enc_data->ciphertext.data);
return ret;
}
krb5_error_code krb5_decrypt_data(krb5_context context, krb5_keyblock *key,
krb5_pointer ivec, krb5_enc_data *enc_data,
krb5_data *data)
{
krb5_error_code ret;
krb5_data ivecd;
size_t blocksize;
if (ivec) {
ret = krb5_c_block_size(context, key->enctype, &blocksize);
if (ret)
return ret;
ivecd = make_data(ivec, blocksize);
}
ret = alloc_data(data, enc_data->ciphertext.length);
if (ret)
return ret;
ret = krb5_c_decrypt(context, key, 0, ivec ? &ivecd : 0, enc_data, data);
if (ret)
free(data->data);
return 0;
}
krb5_boolean KRB5_CALLCONV
valid_cksumtype(krb5_cksumtype ctype)
{
return krb5_c_valid_cksumtype(ctype);
}
krb5_boolean KRB5_CALLCONV
is_keyed_cksum(krb5_cksumtype ctype)
{
return krb5_c_is_keyed_cksum(ctype);
}
krb5_boolean KRB5_CALLCONV
is_coll_proof_cksum(krb5_cksumtype ctype)
{
return krb5_c_is_coll_proof_cksum(ctype);
}
krb5_boolean KRB5_CALLCONV
valid_enctype(krb5_enctype etype)
{
return krb5_c_valid_enctype(etype);
}