57f7373583
Add a encrypt_iov function pointer to all of our encryption types which can be used to implement an iovec based encryption routine. Modify krb5_encrypt_iov so that it calls the iovec based routine if it is available.
404 lines
9.4 KiB
C
404 lines
9.4 KiB
C
/*
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* Copyright (c) 1997 - 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_locl.h"
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#ifdef HEIM_WEAK_CRYPTO
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static void
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krb5_DES_random_key(krb5_context context,
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krb5_keyblock *key)
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{
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DES_cblock *k = key->keyvalue.data;
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do {
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krb5_generate_random_block(k, sizeof(DES_cblock));
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DES_set_odd_parity(k);
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} while(DES_is_weak_key(k));
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}
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static void
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krb5_DES_schedule_old(krb5_context context,
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struct _krb5_key_type *kt,
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struct _krb5_key_data *key)
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{
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DES_set_key_unchecked(key->key->keyvalue.data, key->schedule->data);
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}
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static void
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krb5_DES_random_to_key(krb5_context context,
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krb5_keyblock *key,
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const void *data,
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size_t size)
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{
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DES_cblock *k = key->keyvalue.data;
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memcpy(k, data, key->keyvalue.length);
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DES_set_odd_parity(k);
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if(DES_is_weak_key(k))
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_krb5_xor8(*k, (const unsigned char*)"\0\0\0\0\0\0\0\xf0");
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}
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static struct _krb5_key_type keytype_des_old = {
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ETYPE_DES_CBC_CRC,
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"des-old",
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56,
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8,
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sizeof(DES_key_schedule),
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krb5_DES_random_key,
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krb5_DES_schedule_old,
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_krb5_des_salt,
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krb5_DES_random_to_key,
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NULL,
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NULL
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};
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static struct _krb5_key_type keytype_des = {
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ETYPE_DES_CBC_CRC,
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"des",
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56,
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8,
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sizeof(struct _krb5_evp_schedule),
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krb5_DES_random_key,
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_krb5_evp_schedule,
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_krb5_des_salt,
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krb5_DES_random_to_key,
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_krb5_evp_cleanup,
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EVP_des_cbc
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};
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static krb5_error_code
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CRC32_checksum(krb5_context context,
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krb5_crypto crypto,
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struct _krb5_key_data *key,
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unsigned usage,
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const struct krb5_crypto_iov *iov,
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int niov,
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Checksum *C)
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{
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uint32_t crc = 0;
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unsigned char *r = C->checksum.data;
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int i;
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_krb5_crc_init_table ();
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for (i = 0; i < niov; i++) {
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if (_krb5_crypto_iov_should_sign(&iov[i]))
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crc = _krb5_crc_update(iov[i].data.data, iov[i].data.length, crc);
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}
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r[0] = crc & 0xff;
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r[1] = (crc >> 8) & 0xff;
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r[2] = (crc >> 16) & 0xff;
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r[3] = (crc >> 24) & 0xff;
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return 0;
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}
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static krb5_error_code
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RSA_MD4_checksum(krb5_context context,
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krb5_crypto crypto,
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struct _krb5_key_data *key,
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unsigned usage,
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const struct krb5_crypto_iov *iov,
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int niov,
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Checksum *C)
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{
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if (_krb5_evp_digest_iov(crypto, iov, niov, C->checksum.data,
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NULL, EVP_md4(), NULL) != 1)
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krb5_abortx(context, "md4 checksum failed");
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return 0;
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}
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static krb5_error_code
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RSA_MD4_DES_checksum(krb5_context context,
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krb5_crypto crypto,
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struct _krb5_key_data *key,
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unsigned usage,
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const struct krb5_crypto_iov *iov,
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int niov,
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Checksum *cksum)
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{
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return _krb5_des_checksum(context, EVP_md4(), key, iov, niov, cksum);
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}
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static krb5_error_code
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RSA_MD4_DES_verify(krb5_context context,
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krb5_crypto crypto,
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struct _krb5_key_data *key,
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unsigned usage,
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const struct krb5_crypto_iov *iov,
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int niov,
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Checksum *C)
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{
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return _krb5_des_verify(context, EVP_md4(), key, iov, niov, C);
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}
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static krb5_error_code
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RSA_MD5_DES_checksum(krb5_context context,
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krb5_crypto crypto,
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struct _krb5_key_data *key,
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unsigned usage,
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const struct krb5_crypto_iov *iov,
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int niov,
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Checksum *C)
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{
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return _krb5_des_checksum(context, EVP_md5(), key, iov, niov, C);
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}
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static krb5_error_code
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RSA_MD5_DES_verify(krb5_context context,
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krb5_crypto crypto,
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struct _krb5_key_data *key,
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unsigned usage,
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const struct krb5_crypto_iov *iov,
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int niov,
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Checksum *C)
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{
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return _krb5_des_verify(context, EVP_md5(), key, iov, niov, C);
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}
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struct _krb5_checksum_type _krb5_checksum_crc32 = {
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CKSUMTYPE_CRC32,
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"crc32",
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1,
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4,
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0,
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CRC32_checksum,
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NULL
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};
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struct _krb5_checksum_type _krb5_checksum_rsa_md4 = {
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CKSUMTYPE_RSA_MD4,
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"rsa-md4",
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64,
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16,
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F_CPROOF,
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RSA_MD4_checksum,
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NULL
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};
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struct _krb5_checksum_type _krb5_checksum_rsa_md4_des = {
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CKSUMTYPE_RSA_MD4_DES,
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"rsa-md4-des",
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64,
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24,
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F_KEYED | F_CPROOF | F_VARIANT,
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RSA_MD4_DES_checksum,
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RSA_MD4_DES_verify
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};
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struct _krb5_checksum_type _krb5_checksum_rsa_md5_des = {
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CKSUMTYPE_RSA_MD5_DES,
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"rsa-md5-des",
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64,
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24,
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F_KEYED | F_CPROOF | F_VARIANT,
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RSA_MD5_DES_checksum,
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RSA_MD5_DES_verify
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};
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static krb5_error_code
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evp_des_encrypt_null_ivec(krb5_context context,
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struct _krb5_key_data *key,
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void *data,
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size_t len,
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krb5_boolean encryptp,
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int usage,
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void *ignore_ivec)
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{
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struct _krb5_evp_schedule *ctx = key->schedule->data;
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EVP_CIPHER_CTX *c;
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DES_cblock ivec;
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memset(&ivec, 0, sizeof(ivec));
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c = encryptp ? &ctx->ectx : &ctx->dctx;
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EVP_CipherInit_ex(c, NULL, NULL, NULL, (void *)&ivec, -1);
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EVP_Cipher(c, data, data, len);
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return 0;
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}
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static krb5_error_code
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evp_des_encrypt_key_ivec(krb5_context context,
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struct _krb5_key_data *key,
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void *data,
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size_t len,
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krb5_boolean encryptp,
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int usage,
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void *ignore_ivec)
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{
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struct _krb5_evp_schedule *ctx = key->schedule->data;
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EVP_CIPHER_CTX *c;
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DES_cblock ivec;
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memcpy(&ivec, key->key->keyvalue.data, sizeof(ivec));
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c = encryptp ? &ctx->ectx : &ctx->dctx;
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EVP_CipherInit_ex(c, NULL, NULL, NULL, (void *)&ivec, -1);
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EVP_Cipher(c, data, data, len);
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return 0;
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}
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static krb5_error_code
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DES_CFB64_encrypt_null_ivec(krb5_context context,
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struct _krb5_key_data *key,
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void *data,
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size_t len,
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krb5_boolean encryptp,
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int usage,
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void *ignore_ivec)
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{
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DES_cblock ivec;
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int num = 0;
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DES_key_schedule *s = key->schedule->data;
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memset(&ivec, 0, sizeof(ivec));
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DES_cfb64_encrypt(data, data, len, s, &ivec, &num, encryptp);
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return 0;
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}
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static krb5_error_code
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DES_PCBC_encrypt_key_ivec(krb5_context context,
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struct _krb5_key_data *key,
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void *data,
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size_t len,
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krb5_boolean encryptp,
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int usage,
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void *ignore_ivec)
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{
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DES_cblock ivec;
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DES_key_schedule *s = key->schedule->data;
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memcpy(&ivec, key->key->keyvalue.data, sizeof(ivec));
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DES_pcbc_encrypt(data, data, len, s, &ivec, encryptp);
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return 0;
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}
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struct _krb5_encryption_type _krb5_enctype_des_cbc_crc = {
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ETYPE_DES_CBC_CRC,
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"des-cbc-crc",
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NULL,
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8,
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8,
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8,
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&keytype_des,
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&_krb5_checksum_crc32,
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NULL,
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F_DISABLED|F_WEAK,
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evp_des_encrypt_key_ivec,
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NULL,
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0,
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NULL
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};
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struct _krb5_encryption_type _krb5_enctype_des_cbc_md4 = {
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ETYPE_DES_CBC_MD4,
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"des-cbc-md4",
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NULL,
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8,
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8,
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8,
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&keytype_des,
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&_krb5_checksum_rsa_md4,
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&_krb5_checksum_rsa_md4_des,
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F_DISABLED|F_WEAK,
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evp_des_encrypt_null_ivec,
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NULL,
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0,
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NULL
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};
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struct _krb5_encryption_type _krb5_enctype_des_cbc_md5 = {
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ETYPE_DES_CBC_MD5,
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"des-cbc-md5",
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NULL,
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8,
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8,
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8,
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&keytype_des,
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&_krb5_checksum_rsa_md5,
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&_krb5_checksum_rsa_md5_des,
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F_DISABLED|F_WEAK,
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evp_des_encrypt_null_ivec,
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NULL,
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0,
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NULL
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};
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struct _krb5_encryption_type _krb5_enctype_des_cbc_none = {
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ETYPE_DES_CBC_NONE,
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"des-cbc-none",
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NULL,
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8,
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8,
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0,
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&keytype_des,
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&_krb5_checksum_none,
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NULL,
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F_PSEUDO|F_DISABLED|F_WEAK,
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evp_des_encrypt_null_ivec,
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NULL,
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0,
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NULL
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};
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struct _krb5_encryption_type _krb5_enctype_des_cfb64_none = {
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ETYPE_DES_CFB64_NONE,
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"des-cfb64-none",
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NULL,
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1,
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1,
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0,
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&keytype_des_old,
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&_krb5_checksum_none,
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NULL,
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F_PSEUDO|F_DISABLED|F_WEAK,
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DES_CFB64_encrypt_null_ivec,
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NULL,
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0,
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NULL
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};
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struct _krb5_encryption_type _krb5_enctype_des_pcbc_none = {
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ETYPE_DES_PCBC_NONE,
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"des-pcbc-none",
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NULL,
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8,
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8,
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0,
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&keytype_des_old,
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&_krb5_checksum_none,
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NULL,
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F_PSEUDO|F_DISABLED|F_WEAK,
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DES_PCBC_encrypt_key_ivec,
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NULL,
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0,
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NULL
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};
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#endif /* HEIM_WEAK_CRYPTO */
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