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Expose the crypto operations on the master key.

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git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@15864 ec53bebd-3082-4978-b11e-865c3cabbd6b
This commit is contained in:
Love Hörnquist Åstrand
2005-08-10 08:41:03 +00:00
parent 4f3db39a0d
commit 067af5ca8e
1 changed files with 47 additions and 24 deletions
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47
lib/hdb/mkey.c
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@@ -354,23 +354,47 @@ hdb_write_master_key(krb5_context context, const char *filename,
return ret;
}
static hdb_master_key
find_master_key(Key *key, hdb_master_key mkey)
hdb_master_key
_hdb_find_master_key(u_int32_t *mkvno, hdb_master_key mkey)
{
hdb_master_key ret = NULL;
while(mkey) {
if(ret == NULL && mkey->keytab.vno == 0)
ret = mkey;
if(key->mkvno == NULL) {
if(mkvno == NULL) {
if(ret == NULL || mkey->keytab.vno > ret->keytab.vno)
ret = mkey;
} else if(mkey->keytab.vno == *key->mkvno)
} else if(mkey->keytab.vno == *mkvno)
return mkey;
mkey = mkey->next;
}
return ret;
}
int
_hdb_mkey_version(hdb_master_key mkey)
{
return mkey->keytab.vno;
}
int
_hdb_mkey_decrypt(krb5_context context, hdb_master_key key,
krb5_key_usage usage,
void *ptr, size_t size, krb5_data *res)
{
return krb5_decrypt(context, key->crypto, usage,
ptr, size, res);
}
int
_hdb_mkey_encrypt(krb5_context context, hdb_master_key key,
krb5_key_usage usage,
const void *ptr, size_t size, krb5_data *res)
{
return krb5_encrypt(context, key->crypto, usage,
ptr, size, res);
}
krb5_error_code
hdb_unseal_key_mkey(krb5_context context, Key *k, hdb_master_key mkey)
{
@@ -384,18 +408,18 @@ hdb_unseal_key_mkey(krb5_context context, Key *k, hdb_master_key mkey)
if(k->mkvno == NULL)
return 0;
key = find_master_key(k, mkey);
key = _hdb_find_master_key(k->mkvno, mkey);
if (key == NULL)
return HDB_ERR_NO_MKEY;
ret = krb5_decrypt(context, key->crypto, HDB_KU_MKEY,
ret = _hdb_mkey_decrypt(context, key, HDB_KU_MKEY,
k->key.keyvalue.data,
k->key.keyvalue.length,
&res);
if(ret == KRB5KRB_AP_ERR_BAD_INTEGRITY) {
/* try to decrypt with MIT key usage */
ret = krb5_decrypt(context, key->crypto, 0,
ret = _hdb_mkey_decrypt(context, key, 0,
k->key.keyvalue.data,
k->key.keyvalue.length,
&res);
@@ -462,15 +486,12 @@ hdb_seal_key_mkey(krb5_context context, Key *k, hdb_master_key mkey)
krb5_data res;
hdb_master_key key;
if(k->mkvno != NULL)
return 0;
key = find_master_key(k, mkey);
key = _hdb_find_master_key(k->mkvno, mkey);
if (key == NULL)
return HDB_ERR_NO_MKEY;
ret = krb5_encrypt(context, key->crypto, HDB_KU_MKEY,
ret = _hdb_mkey_encrypt(context, key, HDB_KU_MKEY,
k->key.keyvalue.data,
k->key.keyvalue.length,
&res);
@@ -481,9 +502,11 @@ hdb_seal_key_mkey(krb5_context context, Key *k, hdb_master_key mkey)
free(k->key.keyvalue.data);
k->key.keyvalue = res;
if (k->mkvno == NULL) {
k->mkvno = malloc(sizeof(*k->mkvno));
if (k->mkvno == NULL)
return ENOMEM;
}
*k->mkvno = key->keytab.vno;
return 0;