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free NULL cleanup

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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
Download Patch File Download Diff File Expand all files Collapse all files

1
apps/dh.c
View File

@@ -314,7 +314,6 @@ int MAIN(int argc, char **argv)
BIO_free(in);
if (out != NULL)
BIO_free_all(out);
if (dh != NULL)
DH_free(dh);
apps_shutdown();
OPENSSL_EXIT(ret);

2
apps/dhparam.c
View File

@@ -319,7 +319,6 @@ int MAIN(int argc, char **argv)
if (!dsa
|| !DSA_generate_parameters_ex(dsa, num, NULL, 0, NULL, NULL,
cb)) {
if (dsa)
DSA_free(dsa);
BN_GENCB_free(cb);
ERR_print_errors(bio_err);
@@ -520,7 +519,6 @@ int MAIN(int argc, char **argv)
BIO_free(in);
if (out != NULL)
BIO_free_all(out);
if (dh != NULL)
DH_free(dh);
apps_shutdown();
OPENSSL_EXIT(ret);

1
apps/dsa.c
View File

@@ -360,7 +360,6 @@ int MAIN(int argc, char **argv)
BIO_free(in);
if (out != NULL)
BIO_free_all(out);
if (dsa != NULL)
DSA_free(dsa);
if (passin)
OPENSSL_free(passin);

1
apps/dsaparam.c
View File

@@ -438,7 +438,6 @@ int MAIN(int argc, char **argv)
BIO_free(in);
if (out != NULL)
BIO_free_all(out);
if (dsa != NULL)
DSA_free(dsa);
apps_shutdown();
OPENSSL_EXIT(ret);

1
apps/gendh.c
View File

@@ -212,7 +212,6 @@ int MAIN(int argc, char **argv)
ERR_print_errors(bio_err);
if (out != NULL)
BIO_free_all(out);
if (dh != NULL)
DH_free(dh);
if (cb != NULL)
BN_GENCB_free(cb);

1
apps/gendsa.c
View File

@@ -271,7 +271,6 @@ int MAIN(int argc, char **argv)
BIO_free(in);
if (out != NULL)
BIO_free_all(out);
if (dsa != NULL)
DSA_free(dsa);
if (passout)
OPENSSL_free(passout);

1
apps/genrsa.c
View File

@@ -311,7 +311,6 @@ int MAIN(int argc, char **argv)
BN_free(bn);
if (cb)
BN_GENCB_free(cb);
if (rsa)
RSA_free(rsa);
if (out)
BIO_free_all(out);

1
apps/rsa.c
View File

@@ -424,7 +424,6 @@ int MAIN(int argc, char **argv)
end:
if (out != NULL)
BIO_free_all(out);
if (rsa != NULL)
RSA_free(rsa);
if (passin)
OPENSSL_free(passin);

1
apps/s_server.c
View File

@@ -3180,7 +3180,6 @@ 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_tmp = NULL;
}

2
apps/speed.c
View File

@@ -2448,12 +2448,10 @@ 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]);
#endif
#ifndef OPENSSL_NO_DSA
for (i = 0; i < DSA_NUM; i++)
if (dsa_key[i] != NULL)
DSA_free(dsa_key[i]);
#endif

2
crypto/dh/dh_ameth.c
View File

@@ -142,7 +142,6 @@ 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);
return 0;
@@ -711,7 +710,6 @@ 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);
return rv;
}

1
crypto/dh/dh_asn1.c
View File

@@ -142,7 +142,6 @@ DH *d2i_DHxparams(DH **a, const unsigned char **pp, long length)
}
if (a) {
if (*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);

2
crypto/dh/dhtest.c
View File

@@ -199,9 +199,7 @@ 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);
if (_cb)
BN_GENCB_free(_cb);

1
crypto/dsa/dsa_ameth.c
View File

@@ -120,7 +120,6 @@ 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);
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;
}

1
crypto/dsa/dsa_lib.c
View File

@@ -315,7 +315,6 @@ DH *DSA_dup_DH(const DSA *r)
return ret;
err:
if (ret != NULL)
DH_free(ret);
return NULL;
}

1
crypto/dsa/dsatest.c
View File

@@ -211,7 +211,6 @@ int main(int argc, char **argv)
end:
if (!ret)
ERR_print_errors(bio_err);
if (dsa != NULL)
DSA_free(dsa);
if (cb != NULL)
BN_GENCB_free(cb);

2
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);
}
return ret;
}

2
crypto/pem/pvkfmt.c
View File

@@ -335,7 +335,6 @@ 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);
if (ret)
EVP_PKEY_free(ret);
@@ -385,7 +384,6 @@ 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);
if (ret)
EVP_PKEY_free(ret);

1
crypto/rsa/rsa_depr.c
View File

@@ -101,7 +101,6 @@ RSA *RSA_generate_key(int bits, unsigned long e_value,
err:
if (e)
BN_free(e);
if (rsa)
RSA_free(rsa);
if (cb)
BN_GENCB_free(cb);

1
demos/easy_tls/easy-tls.c
View File

@@ -637,7 +637,6 @@ void tls_set_dhe1024(int i, void *apparg)
tls_openssl_errors("", "", NULL, apparg);
return;
}
if (tls_dhe1024 != NULL)
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

2
engines/ccgost/gost_ameth.c
View File

@@ -276,10 +276,8 @@ 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);
}
}
static void pkey_free_gost01(EVP_PKEY *key)
{

2
engines/e_capi.c
View File

@@ -754,9 +754,7 @@ 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);
}

1
engines/e_chil.c
View File

@@ -849,7 +849,6 @@ static EVP_PKEY *hwcrhk_load_privkey(ENGINE *eng, const char *key_id,
return res;
err:
# ifndef OPENSSL_NO_RSA
if (rtmp)
RSA_free(rtmp);
# endif
return NULL;

2
engines/e_sureware.c
View File

@@ -801,11 +801,9 @@ static EVP_PKEY *sureware_load_public(ENGINE *e, const char *key_id,
return res;
err:
# ifndef OPENSSL_NO_RSA
if (rsatmp)
RSA_free(rsatmp);
# endif
# ifndef OPENSSL_NO_DSA
if (dsatmp)
DSA_free(dsatmp);
# endif
return NULL;

6
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;
}
#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;
}
#endif
#ifndef OPENSSL_NO_EC
if (s->session->sess_cert->peer_ecdh_tmp) {
@@ -1955,11 +1951,9 @@ int ssl3_get_key_exchange(SSL *s)
err:
EVP_PKEY_free(pkey);
#ifndef OPENSSL_NO_RSA
if (rsa != NULL)
RSA_free(rsa);
#endif
#ifndef OPENSSL_NO_DH
if (dh != NULL)
DH_free(dh);
#endif
#ifndef OPENSSL_NO_EC

7
ssl/s3_lib.c
View File

@@ -3138,7 +3138,6 @@ 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);
#endif
#ifndef OPENSSL_NO_EC
@@ -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;
}
#endif
#ifndef OPENSSL_NO_EC
if (s->s3->tmp.ecdh != NULL) {
@@ -3293,7 +3290,6 @@ 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);
s->cert->rsa_tmp = rsa;
ret = 1;
@@ -3329,7 +3325,6 @@ 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);
s->cert->dh_tmp = dh;
ret = 1;
@@ -3766,7 +3761,6 @@ 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);
cert->rsa_tmp = rsa;
return (1);
@@ -3801,7 +3795,6 @@ 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);
cert->dh_tmp = new;
return 1;

4
ssl/ssl_cert.c
View File

@@ -443,11 +443,9 @@ void ssl_cert_free(CERT *c)
#endif
#ifndef OPENSSL_NO_RSA
if (c->rsa_tmp)
RSA_free(c->rsa_tmp);
#endif
#ifndef OPENSSL_NO_DH
if (c->dh_tmp)
DH_free(c->dh_tmp);
#endif
#ifndef OPENSSL_NO_EC
@@ -651,11 +649,9 @@ void ssl_sess_cert_free(SESS_CERT *sc)
}
#ifndef OPENSSL_NO_RSA
if (sc->peer_rsa_tmp != NULL)
RSA_free(sc->peer_rsa_tmp);
#endif
#ifndef OPENSSL_NO_DH
if (sc->peer_dh_tmp != NULL)
DH_free(sc->peer_dh_tmp);
#endif
#ifndef OPENSSL_NO_EC

1
ssl/ssl_conf.c
View File

@@ -421,7 +421,6 @@ 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);
if (in)
BIO_free(in);

2
ssl/ssltest.c
View File

@@ -2968,11 +2968,9 @@ 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;
}
}
#endif
#ifndef OPENSSL_NO_DH