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free NULL cleanup

Browse source 
Start ensuring all OpenSSL "free" routines allow NULL, and remove
any if check before calling them.
This gets DH_free, DSA_free, RSA_free

Reviewed-by: Matt Caswell <matt@openssl.org>
This commit is contained in:
Rich Salz 2015-03-24 10:17:37 -04:00
parent 1300705a47
commit d64070838e
34 changed files with 58 additions and 108 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
apps/dh.c
View file

@ -314,8 +314,7 @@ int MAIN(int argc, char **argv)
BIO_free(in);
if (out != NULL)
BIO_free_all(out);
if (dh != NULL)
DH_free(dh);
DH_free(dh);
apps_shutdown();
OPENSSL_EXIT(ret);
}

6
apps/dhparam.c
View file

@ -319,8 +319,7 @@ int MAIN(int argc, char **argv)
if (!dsa
|| !DSA_generate_parameters_ex(dsa, num, NULL, 0, NULL, NULL,
cb)) {
if (dsa)
DSA_free(dsa);
DSA_free(dsa);
BN_GENCB_free(cb);
ERR_print_errors(bio_err);
goto end;
@ -520,8 +519,7 @@ int MAIN(int argc, char **argv)
BIO_free(in);
if (out != NULL)
BIO_free_all(out);
if (dh != NULL)
DH_free(dh);
DH_free(dh);
apps_shutdown();
OPENSSL_EXIT(ret);
}

3
apps/dsa.c
View file

@ -360,8 +360,7 @@ int MAIN(int argc, char **argv)
BIO_free(in);
if (out != NULL)
BIO_free_all(out);
if (dsa != NULL)
DSA_free(dsa);
DSA_free(dsa);
if (passin)
OPENSSL_free(passin);
if (passout)

3
apps/dsaparam.c
View file

@ -438,8 +438,7 @@ int MAIN(int argc, char **argv)
BIO_free(in);
if (out != NULL)
BIO_free_all(out);
if (dsa != NULL)
DSA_free(dsa);
DSA_free(dsa);
apps_shutdown();
OPENSSL_EXIT(ret);
}

3
apps/gendh.c
View file

@ -212,8 +212,7 @@ int MAIN(int argc, char **argv)
ERR_print_errors(bio_err);
if (out != NULL)
BIO_free_all(out);
if (dh != NULL)
DH_free(dh);
DH_free(dh);
if (cb != NULL)
BN_GENCB_free(cb);
apps_shutdown();

3
apps/gendsa.c
View file

@ -271,8 +271,7 @@ int MAIN(int argc, char **argv)
BIO_free(in);
if (out != NULL)
BIO_free_all(out);
if (dsa != NULL)
DSA_free(dsa);
DSA_free(dsa);
if (passout)
OPENSSL_free(passout);
apps_shutdown();

3
apps/genrsa.c
View file

@ -311,8 +311,7 @@ int MAIN(int argc, char **argv)
BN_free(bn);
if (cb)
BN_GENCB_free(cb);
if (rsa)
RSA_free(rsa);
RSA_free(rsa);
if (out)
BIO_free_all(out);
if (passout)

3
apps/rsa.c
View file

@ -424,8 +424,7 @@ int MAIN(int argc, char **argv)
end:
if (out != NULL)
BIO_free_all(out);
if (rsa != NULL)
RSA_free(rsa);
RSA_free(rsa);
if (passin)
OPENSSL_free(passin);
if (passout)

3
apps/s_server.c
View file

@ -3180,8 +3180,7 @@ static RSA *tmp_rsa_cb(SSL *s, int is_export, int keylength)
}
if (!BN_set_word(bn, RSA_F4) || ((rsa_tmp = RSA_new()) == NULL) ||
!RSA_generate_key_ex(rsa_tmp, keylength, bn, NULL)) {
if (rsa_tmp)
RSA_free(rsa_tmp);
RSA_free(rsa_tmp);
rsa_tmp = NULL;
}
if (!s_quiet) {

6
apps/speed.c
View file

@ -2448,13 +2448,11 @@ int MAIN(int argc, char **argv)
OPENSSL_free(buf2_malloc);
#ifndef OPENSSL_NO_RSA
for (i = 0; i < RSA_NUM; i++)
if (rsa_key[i] != NULL)
RSA_free(rsa_key[i]);
RSA_free(rsa_key[i]);
#endif
#ifndef OPENSSL_NO_DSA
for (i = 0; i < DSA_NUM; i++)
if (dsa_key[i] != NULL)
DSA_free(dsa_key[i]);
DSA_free(dsa_key[i]);
#endif
#ifndef OPENSSL_NO_EC

6
crypto/dh/dh_ameth.c
View file

@ -142,8 +142,7 @@ static int dh_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
err:
if (public_key)
ASN1_INTEGER_free(public_key);
if (dh)
DH_free(dh);
DH_free(dh);
return 0;
}
@ -711,8 +710,7 @@ static int dh_cms_set_peerkey(EVP_PKEY_CTX *pctx,
ASN1_INTEGER_free(public_key);
if (pkpeer)
EVP_PKEY_free(pkpeer);
if (dhpeer)
DH_free(dhpeer);
DH_free(dhpeer);
return rv;
}

3
crypto/dh/dh_asn1.c
View file

@ -142,8 +142,7 @@ DH *d2i_DHxparams(DH **a, const unsigned char **pp, long length)
}
if (a) {
if (*a)
DH_free(*a);
DH_free(*a);
*a = dh;
}

1
crypto/dh/dh_lib.c
View file

@ -170,6 +170,7 @@ DH *DH_new_method(ENGINE *engine)
void DH_free(DH *r)
{
int i;
if (r == NULL)
return;
i = CRYPTO_add(&r->references, -1, CRYPTO_LOCK_DH);

6
crypto/dh/dhtest.c
View file

@ -199,10 +199,8 @@ int main(int argc, char *argv[])
OPENSSL_free(abuf);
if (bbuf != NULL)
OPENSSL_free(bbuf);
if (b != NULL)
DH_free(b);
if (a != NULL)
DH_free(a);
DH_free(b);
DH_free(a);
if (_cb)
BN_GENCB_free(_cb);
BIO_free(out);

3
crypto/dsa/dsa_ameth.c
View file

@ -120,8 +120,7 @@ static int dsa_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
err:
if (public_key)
ASN1_INTEGER_free(public_key);
if (dsa)
DSA_free(dsa);
DSA_free(dsa);
return 0;
}

7
crypto/dsa/dsa_depr.c
View file

@ -89,10 +89,8 @@ DSA *DSA_generate_parameters(int bits,
if ((ret = DSA_new()) == NULL)
return NULL;
cb = BN_GENCB_new();
if (!cb) {
DSA_free(ret);
return NULL;
}
if (!cb)
goto err;
BN_GENCB_set_old(cb, callback, cb_arg);
@ -102,6 +100,7 @@ DSA *DSA_generate_parameters(int bits,
return ret;
}
BN_GENCB_free(cb);
err:
DSA_free(ret);
return NULL;
}

3
crypto/dsa/dsa_lib.c
View file

@ -315,8 +315,7 @@ DH *DSA_dup_DH(const DSA *r)
return ret;
err:
if (ret != NULL)
DH_free(ret);
DH_free(ret);
return NULL;
}
#endif

3
crypto/dsa/dsatest.c
View file

@ -211,8 +211,7 @@ int main(int argc, char **argv)
end:
if (!ret)
ERR_print_errors(bio_err);
if (dsa != NULL)
DSA_free(dsa);
DSA_free(dsa);
if (cb != NULL)
BN_GENCB_free(cb);
CRYPTO_cleanup_all_ex_data();

4
crypto/evp/evp_extra_test.c
View file

@ -268,9 +268,7 @@ static EVP_PKEY *load_example_rsa_key(void)
if (pkey) {
EVP_PKEY_free(pkey);
}
if (rsa) {
RSA_free(rsa);
}
RSA_free(rsa);
return ret;
}

6
crypto/pem/pvkfmt.c
View file

@ -335,8 +335,7 @@ static EVP_PKEY *b2i_dss(const unsigned char **in, unsigned int length,
memerr:
PEMerr(PEM_F_B2I_DSS, ERR_R_MALLOC_FAILURE);
if (dsa)
DSA_free(dsa);
DSA_free(dsa);
if (ret)
EVP_PKEY_free(ret);
if (ctx)
@ -385,8 +384,7 @@ static EVP_PKEY *b2i_rsa(const unsigned char **in, unsigned int length,
return ret;
memerr:
PEMerr(PEM_F_B2I_RSA, ERR_R_MALLOC_FAILURE);
if (rsa)
RSA_free(rsa);
RSA_free(rsa);
if (ret)
EVP_PKEY_free(ret);
return NULL;

3
crypto/rsa/rsa_depr.c
View file

@ -101,8 +101,7 @@ RSA *RSA_generate_key(int bits, unsigned long e_value,
err:
if (e)
BN_free(e);
if (rsa)
RSA_free(rsa);
RSA_free(rsa);
if (cb)
BN_GENCB_free(cb);
return 0;

3
demos/easy_tls/easy-tls.c
View file

@ -637,8 +637,7 @@ void tls_set_dhe1024(int i, void *apparg)
tls_openssl_errors("", "", NULL, apparg);
return;
}
if (tls_dhe1024 != NULL)
DH_free(tls_dhe1024);
DH_free(tls_dhe1024);
tls_dhe1024 = dhparams;
}

1
doc/crypto/DH_new.pod
View file

@ -18,6 +18,7 @@ DH_new() allocates and initializes a B<DH> structure.
DH_free() frees the B<DH> structure and its components. The values are
erased before the memory is returned to the system.
If B<dh> is NULL nothing is done.
=head1 RETURN VALUES

1
doc/crypto/DSA_new.pod
View file

@ -19,6 +19,7 @@ calling DSA_new_method(NULL).
DSA_free() frees the B<DSA> structure and its components. The values are
erased before the memory is returned to the system.
If B<dsa> is NULL nothing is done.
=head1 RETURN VALUES

1
doc/crypto/RSA_new.pod
View file

@ -19,6 +19,7 @@ calling RSA_new_method(NULL).
RSA_free() frees the B<RSA> structure and its components. The key is
erased before the memory is returned to the system.
If B<rsa> is NULL nothing is done.
=head1 RETURN VALUES

4
engines/ccgost/gost_ameth.c
View file

@ -276,9 +276,7 @@ static int pkey_ctrl_gost(EVP_PKEY *pkey, int op, long arg1, void *arg2)
/* --------------------- free functions * ------------------------------*/
static void pkey_free_gost94(EVP_PKEY *key)
{
if (key->pkey.dsa) {
DSA_free(key->pkey.dsa);
}
DSA_free(key->pkey.dsa);
}
static void pkey_free_gost01(EVP_PKEY *key)

6
engines/e_capi.c
View file

@ -754,10 +754,8 @@ static EVP_PKEY *capi_get_pkey(ENGINE *eng, CAPI_KEY * key)
if (pubkey)
OPENSSL_free(pubkey);
if (!ret) {
if (rkey)
RSA_free(rkey);
if (dkey)
DSA_free(dkey);
RSA_free(rkey);
DSA_free(dkey);
}
return ret;

3
engines/e_chil.c
View file

@ -849,8 +849,7 @@ static EVP_PKEY *hwcrhk_load_privkey(ENGINE *eng, const char *key_id,
return res;
err:
# ifndef OPENSSL_NO_RSA
if (rtmp)
RSA_free(rtmp);
RSA_free(rtmp);
# endif
return NULL;
}

6
engines/e_sureware.c
View file

@ -801,12 +801,10 @@ static EVP_PKEY *sureware_load_public(ENGINE *e, const char *key_id,
return res;
err:
# ifndef OPENSSL_NO_RSA
if (rsatmp)
RSA_free(rsatmp);
RSA_free(rsatmp);
# endif
# ifndef OPENSSL_NO_DSA
if (dsatmp)
DSA_free(dsatmp);
DSA_free(dsatmp);
# endif
return NULL;
}

18
ssl/s3_clnt.c
View file

@ -1380,16 +1380,12 @@ int ssl3_get_key_exchange(SSL *s)
param = p = (unsigned char *)s->init_msg;
if (s->session->sess_cert != NULL) {
#ifndef OPENSSL_NO_RSA
if (s->session->sess_cert->peer_rsa_tmp != NULL) {
RSA_free(s->session->sess_cert->peer_rsa_tmp);
s->session->sess_cert->peer_rsa_tmp = NULL;
}
RSA_free(s->session->sess_cert->peer_rsa_tmp);
s->session->sess_cert->peer_rsa_tmp = NULL;
#endif
#ifndef OPENSSL_NO_DH
if (s->session->sess_cert->peer_dh_tmp) {
DH_free(s->session->sess_cert->peer_dh_tmp);
s->session->sess_cert->peer_dh_tmp = NULL;
}
DH_free(s->session->sess_cert->peer_dh_tmp);
s->session->sess_cert->peer_dh_tmp = NULL;
#endif
#ifndef OPENSSL_NO_EC
if (s->session->sess_cert->peer_ecdh_tmp) {
@ -1955,12 +1951,10 @@ int ssl3_get_key_exchange(SSL *s)
err:
EVP_PKEY_free(pkey);
#ifndef OPENSSL_NO_RSA
if (rsa != NULL)
RSA_free(rsa);
RSA_free(rsa);
#endif
#ifndef OPENSSL_NO_DH
if (dh != NULL)
DH_free(dh);
DH_free(dh);
#endif
#ifndef OPENSSL_NO_EC
BN_CTX_free(bn_ctx);

21
ssl/s3_lib.c
View file

@ -3138,8 +3138,7 @@ void ssl3_free(SSL *s)
if (s->s3->rrec.comp != NULL)
OPENSSL_free(s->s3->rrec.comp);
#ifndef OPENSSL_NO_DH
if (s->s3->tmp.dh != NULL)
DH_free(s->s3->tmp.dh);
DH_free(s->s3->tmp.dh);
#endif
#ifndef OPENSSL_NO_EC
if (s->s3->tmp.ecdh != NULL)
@ -3181,10 +3180,8 @@ void ssl3_clear(SSL *s)
s->s3->rrec.comp = NULL;
}
#ifndef OPENSSL_NO_DH
if (s->s3->tmp.dh != NULL) {
DH_free(s->s3->tmp.dh);
s->s3->tmp.dh = NULL;
}
DH_free(s->s3->tmp.dh);
s->s3->tmp.dh = NULL;
#endif
#ifndef OPENSSL_NO_EC
if (s->s3->tmp.ecdh != NULL) {
@ -3293,8 +3290,7 @@ long ssl3_ctrl(SSL *s, int cmd, long larg, void *parg)
SSLerr(SSL_F_SSL3_CTRL, ERR_R_RSA_LIB);
return (ret);
}
if (s->cert->rsa_tmp != NULL)
RSA_free(s->cert->rsa_tmp);
RSA_free(s->cert->rsa_tmp);
s->cert->rsa_tmp = rsa;
ret = 1;
}
@ -3329,8 +3325,7 @@ long ssl3_ctrl(SSL *s, int cmd, long larg, void *parg)
return (ret);
}
}
if (s->cert->dh_tmp != NULL)
DH_free(s->cert->dh_tmp);
DH_free(s->cert->dh_tmp);
s->cert->dh_tmp = dh;
ret = 1;
}
@ -3766,8 +3761,7 @@ long ssl3_ctx_ctrl(SSL_CTX *ctx, int cmd, long larg, void *parg)
SSLerr(SSL_F_SSL3_CTX_CTRL, ERR_R_RSA_LIB);
return (0);
} else {
if (cert->rsa_tmp != NULL)
RSA_free(cert->rsa_tmp);
RSA_free(cert->rsa_tmp);
cert->rsa_tmp = rsa;
return (1);
}
@ -3801,8 +3795,7 @@ long ssl3_ctx_ctrl(SSL_CTX *ctx, int cmd, long larg, void *parg)
return 0;
}
}
if (cert->dh_tmp != NULL)
DH_free(cert->dh_tmp);
DH_free(cert->dh_tmp);
cert->dh_tmp = new;
return 1;
}

12
ssl/ssl_cert.c
View file

@ -443,12 +443,10 @@ void ssl_cert_free(CERT *c)
#endif
#ifndef OPENSSL_NO_RSA
if (c->rsa_tmp)
RSA_free(c->rsa_tmp);
RSA_free(c->rsa_tmp);
#endif
#ifndef OPENSSL_NO_DH
if (c->dh_tmp)
DH_free(c->dh_tmp);
DH_free(c->dh_tmp);
#endif
#ifndef OPENSSL_NO_EC
if (c->ecdh_tmp)
@ -651,12 +649,10 @@ void ssl_sess_cert_free(SESS_CERT *sc)
}
#ifndef OPENSSL_NO_RSA
if (sc->peer_rsa_tmp != NULL)
RSA_free(sc->peer_rsa_tmp);
RSA_free(sc->peer_rsa_tmp);
#endif
#ifndef OPENSSL_NO_DH
if (sc->peer_dh_tmp != NULL)
DH_free(sc->peer_dh_tmp);
DH_free(sc->peer_dh_tmp);
#endif
#ifndef OPENSSL_NO_EC
if (sc->peer_ecdh_tmp != NULL)

3
ssl/ssl_conf.c
View file

@ -421,8 +421,7 @@ static int cmd_DHParameters(SSL_CONF_CTX *cctx, const char *value)
if (cctx->ssl)
rv = SSL_set_tmp_dh(cctx->ssl, dh);
end:
if (dh)
DH_free(dh);
DH_free(dh);
if (in)
BIO_free(in);
return rv > 0;

6
ssl/ssltest.c
View file

@ -2968,10 +2968,8 @@ static RSA *tmp_rsa_cb(SSL *s, int is_export, int keylength)
static void free_tmp_rsa(void)
{
if (rsa_tmp != NULL) {
RSA_free(rsa_tmp);
rsa_tmp = NULL;
}
RSA_free(rsa_tmp);
rsa_tmp = NULL;
}
#endif