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Use zfree() to explicitly zero IPsec keys.

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Reviewed by:	delphij
Sponsored by:	Chelsio Communications
Differential Revision:	https://reviews.freebsd.org/D25442
This commit is contained in:
John Baldwin 2020-06-25 20:31:06 +00:00
parent f4134e3d87
commit 20869b25cc
4 changed files with 4 additions and 19 deletions
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14
sys/netipsec/key.c
View File

@ -3060,27 +3060,19 @@ key_cleansav(struct secasvar *sav)
if (sav->flags & SADB_X_EXT_F_CLONED)
return;
/*
* Cleanup xform state. Note that zeroize'ing causes the
* keys to be cleared; otherwise we must do it ourself.
* Cleanup xform state.
*/
if (sav->tdb_xform != NULL) {
sav->tdb_xform->xf_zeroize(sav);
sav->tdb_xform = NULL;
} else {
if (sav->key_auth != NULL)
bzero(sav->key_auth->key_data, _KEYLEN(sav->key_auth));
if (sav->key_enc != NULL)
bzero(sav->key_enc->key_data, _KEYLEN(sav->key_enc));
}
if (sav->key_auth != NULL) {
if (sav->key_auth->key_data != NULL)
free(sav->key_auth->key_data, M_IPSEC_MISC);
zfree(sav->key_auth->key_data, M_IPSEC_MISC);
free(sav->key_auth, M_IPSEC_MISC);
sav->key_auth = NULL;
}
if (sav->key_enc != NULL) {
if (sav->key_enc->key_data != NULL)
free(sav->key_enc->key_data, M_IPSEC_MISC);
zfree(sav->key_enc->key_data, M_IPSEC_MISC);
free(sav->key_enc, M_IPSEC_MISC);
sav->key_enc = NULL;
}

3
sys/netipsec/xform_ah.c
View File

@ -250,9 +250,6 @@ int
ah_zeroize(struct secasvar *sav)
{
if (sav->key_auth)
bzero(sav->key_auth->key_data, _KEYLEN(sav->key_auth));
crypto_freesession(sav->tdb_cryptoid);
sav->tdb_cryptoid = NULL;
sav->tdb_authalgxform = NULL;

4
sys/netipsec/xform_esp.c
View File

@ -243,11 +243,9 @@ esp_init(struct secasvar *sav, struct xformsw *xsp)
static int
esp_zeroize(struct secasvar *sav)
{
/* NB: ah_zerorize free's the crypto session state */
/* NB: ah_zeroize free's the crypto session state */
int error = ah_zeroize(sav);
if (sav->key_enc)
bzero(sav->key_enc->key_data, _KEYLEN(sav->key_enc));
sav->tdb_encalgxform = NULL;
sav->tdb_xform = NULL;
return error;

2
sys/netipsec/xform_tcp.c
View File

@ -365,8 +365,6 @@ static int
tcpsignature_zeroize(struct secasvar *sav)
{
if (sav->key_auth != NULL)
bzero(sav->key_auth->key_data, _KEYLEN(sav->key_auth));
sav->tdb_xform = NULL;
return (0);
}