#include "krb5_locl.h"
#ifdef HEIM_KRB5_DES3
static void
DES3_random_key(krb5_context context,
krb5_keyblock *key)
{
uint8_t *k = key->keyvalue.data;
do {
krb5_generate_random_block(key->keyvalue.data, key->keyvalue.length);
CCDesSetOddParity(&k[0], 8);
CCDesSetOddParity(&k[8], 8);
CCDesSetOddParity(&k[16], 8);
} while(CCDesIsWeakKey(&k[0], 8) ||
CCDesIsWeakKey(&k[8], 8) ||
CCDesIsWeakKey(&k[16], 8));
}
#ifdef DES3_OLD_ENCTYPE
static struct _krb5_key_type keytype_des3 = {
ETYPE_OLD_DES3_CBC_SHA1,
"des3",
168,
24,
sizeof(struct _krb5_evp_schedule),
DES3_random_key,
_krb5_evp_schedule,
_krb5_des3_salt,
_krb5_DES3_random_to_key,
_krb5_evp_cleanup,
EVP_des_ede3_cbc
};
#endif
static struct _krb5_key_type keytype_des3_derived = {
ETYPE_OLD_DES3_CBC_SHA1,
"des3",
168,
24,
sizeof(struct _krb5_evp_schedule),
DES3_random_key,
_krb5_evp_schedule,
_krb5_des3_salt_derived,
_krb5_DES3_random_to_key,
_krb5_evp_cleanup,
EVP_des_ede3_cbc
};
#ifdef DES3_OLD_ENCTYPE
static krb5_error_code
RSA_MD5_DES3_checksum(krb5_context context,
struct _krb5_key_data *key,
const void *data,
size_t len,
unsigned usage,
Checksum *C)
{
return _krb5_des_checksum(context, kCCDigestMD5, key, data, len, C);
}
static krb5_error_code
RSA_MD5_DES3_verify(krb5_context context,
struct _krb5_key_data *key,
const void *data,
size_t len,
unsigned usage,
Checksum *C)
{
return _krb5_des_verify(context, kCCDigestMD5, key, data, len, C);
}
struct _krb5_checksum_type _krb5_checksum_rsa_md5_des3 = {
CKSUMTYPE_RSA_MD5_DES3,
"rsa-md5-des3",
64,
24,
F_KEYED | F_CPROOF | F_VARIANT,
RSA_MD5_DES3_checksum,
RSA_MD5_DES3_verify
};
#endif
struct _krb5_checksum_type _krb5_checksum_hmac_sha1_des3 = {
CKSUMTYPE_HMAC_SHA1_DES3,
"hmac-sha1-des3",
64,
20,
F_KEYED | F_CPROOF | F_DERIVED,
_krb5_SP_HMAC_SHA1_checksum,
NULL
};
#ifdef DES3_OLD_ENCTYPE
struct _krb5_encryption_type _krb5_enctype_des3_cbc_md5 = {
ETYPE_DES3_CBC_MD5,
"des3-cbc-md5",
8,
8,
8,
&keytype_des3,
&_krb5_checksum_rsa_md5,
&_krb5_checksum_rsa_md5_des3,
0,
_krb5_evp_encrypt,
0,
NULL
};
#endif
struct _krb5_encryption_type _krb5_enctype_des3_cbc_sha1 = {
ETYPE_DES3_CBC_SHA1,
"des3-cbc-sha1",
8,
8,
8,
&keytype_des3_derived,
&_krb5_checksum_sha1,
&_krb5_checksum_hmac_sha1_des3,
F_DERIVED,
_krb5_evp_encrypt,
0,
NULL
};
#ifdef DES3_OLD_ENCTYPE
struct _krb5_encryption_type _krb5_enctype_old_des3_cbc_sha1 = {
ETYPE_OLD_DES3_CBC_SHA1,
"old-des3-cbc-sha1",
8,
8,
8,
&keytype_des3,
&_krb5_checksum_sha1,
&_krb5_checksum_hmac_sha1_des3,
0,
_krb5_evp_encrypt,
0,
NULL
};
#endif
struct _krb5_encryption_type _krb5_enctype_des3_cbc_none = {
ETYPE_DES3_CBC_NONE,
"des3-cbc-none",
8,
8,
0,
&keytype_des3_derived,
&_krb5_checksum_none,
NULL,
F_PSEUDO,
_krb5_evp_encrypt,
0,
NULL
};
void
_krb5_DES3_random_to_key(krb5_context context,
krb5_keyblock *key,
const void *data,
size_t size)
{
unsigned char *x;
const uint8_t *q = data;
uint8_t *k;
int i, j;
memset(key->keyvalue.data, 0, key->keyvalue.length);
x = key->keyvalue.data;
for (i = 0; i < 3; ++i) {
unsigned char foo;
for (j = 0; j < 7; ++j) {
unsigned char b = q[7 * i + j];
x[8 * i + j] = b;
}
foo = 0;
for (j = 6; j >= 0; --j) {
foo |= q[7 * i + j] & 1;
foo <<= 1;
}
x[8 * i + 7] = foo;
}
k = key->keyvalue.data;
for (i = 0; i < 3; i++) {
CCDesSetOddParity(&k[i * 8], 8);
if(CCDesIsWeakKey(&k[i * 8], 8))
_krb5_xor((void *)&k[i * 8],
(const unsigned char*)"\0\0\0\0\0\0\0\xf0");
}
}
#endif