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cleanup of crypto context, for encryptes that needs to do malloc

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git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@23566 ec53bebd-3082-4978-b11e-865c3cabbd6b
This commit is contained in:
Love Hörnquist Åstrand
2008-08-16 23:04:09 +00:00
parent 634dfaf5f3
commit 65e525ce2e
1 changed files with 31 additions and 12 deletions
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43
lib/krb5/crypto.c
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@@ -94,6 +94,7 @@ struct key_type {
void (*schedule)(krb5_context, struct key_data *);
struct salt_type *string_to_key;
void (*random_to_key)(krb5_context, krb5_keyblock*, const void*, size_t);
void (*cleanup)(krb5_context, struct key_data *);
};
struct checksum_type {
@@ -157,7 +158,9 @@ static krb5_error_code hmac(krb5_context context,
unsigned usage,
struct key_data *keyblock,
Checksum *result);
static void free_key_data(krb5_context context, struct key_data *key);
static void free_key_data(krb5_context,
struct key_data *,
struct encryption_type *);
static krb5_error_code usage2arcfour (krb5_context, unsigned *);
static void xor (DES_cblock *, const unsigned char *);
@@ -662,7 +665,7 @@ AES_string_to_key(krb5_context context,
iter,
et->keytype->size, kd.key->keyvalue.data);
if (ret != 1) {
free_key_data(context, &kd);
free_key_data(context, &kd, et);
krb5_set_error_message(context, KRB5_PROG_KEYTYPE_NOSUPP,
"Error calculating s2k");
return KRB5_PROG_KEYTYPE_NOSUPP;
@@ -671,7 +674,7 @@ AES_string_to_key(krb5_context context,
ret = derive_key(context, et, &kd, "kerberos", strlen("kerberos"));
if (ret == 0)
ret = krb5_copy_keyblock_contents(context, kd.key, key);
free_key_data(context, &kd);
free_key_data(context, &kd, et);
return ret;
}
@@ -705,6 +708,14 @@ AES_schedule(krb5_context context,
EVP_CipherInit_ex(&key->dctx, c, NULL, kd->key->keyvalue.data, NULL, 0);
}
static void
AES_cleanup(krb5_context context, struct key_data *kd)
{
struct krb5_aes_schedule *key = kd->schedule->data;
EVP_CIPHER_CTX_cleanup(&key->ectx);
EVP_CIPHER_CTX_cleanup(&key->dctx);
}
/*
*
*/
@@ -820,7 +831,9 @@ static struct key_type keytype_aes128 = {
sizeof(struct krb5_aes_schedule),
NULL,
AES_schedule,
AES_salt
AES_salt,
NULL,
AES_cleanup
};
static struct key_type keytype_aes256 = {
@@ -831,7 +844,9 @@ static struct key_type keytype_aes256 = {
sizeof(struct krb5_aes_schedule),
NULL,
AES_schedule,
AES_salt
AES_salt,
NULL,
AES_cleanup
};
static struct key_type keytype_arcfour = {
@@ -3587,7 +3602,7 @@ krb5_derive_key(krb5_context context,
ret = derive_key(context, et, &d, constant, constant_len);
if (ret == 0)
ret = krb5_copy_keyblock(context, d.key, derived_key);
free_key_data(context, &d);
free_key_data(context, &d, et);
return ret;
}
@@ -3662,8 +3677,11 @@ krb5_crypto_init(krb5_context context,
}
static void
free_key_data(krb5_context context, struct key_data *key)
free_key_data(krb5_context context, struct key_data *key,
struct encryption_type *et)
{
if (et->keytype->cleanup)
(*et->keytype->cleanup)(context, key);
krb5_free_keyblock(context, key->key);
if(key->schedule) {
memset(key->schedule->data, 0, key->schedule->length);
@@ -3672,9 +3690,10 @@ free_key_data(krb5_context context, struct key_data *key)
}
static void
free_key_usage(krb5_context context, struct key_usage *ku)
free_key_usage(krb5_context context, struct key_usage *ku,
struct encryption_type *et)
{
free_key_data(context, &ku->key);
free_key_data(context, &ku->key, et);
}
krb5_error_code KRB5_LIB_FUNCTION
@@ -3684,9 +3703,9 @@ krb5_crypto_destroy(krb5_context context,
int i;
for(i = 0; i < crypto->num_key_usage; i++)
free_key_usage(context, &crypto->key_usage[i]);
free_key_usage(context, &crypto->key_usage[i], crypto->et);
free(crypto->key_usage);
free_key_data(context, &crypto->key);
free_key_data(context, &crypto->key, crypto->et);
free (crypto);
return 0;
}
@@ -3798,7 +3817,7 @@ krb5_string_to_key_derived(krb5_context context,
"kerberos", /* XXX well known constant */
strlen("kerberos"));
ret = krb5_copy_keyblock_contents(context, kd.key, key);
free_key_data(context, &kd);
free_key_data(context, &kd, et);
return ret;
}