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authorRickard Green <rickard@erlang.org>2010-09-03 20:05:17 +0200
committerRickard Green <rickard@erlang.org>2010-09-03 20:56:51 +0200
commitd7bc40cfe6455ca2de59a93679ef24a9645947fe (patch)
treea65c687810a2d8f0d92e569335d960b95e7406ce /lib/crypto/c_src
parentcac3a16a49d0ba8c4694d985b17403ac4456ade7 (diff)
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Fix memory leaks in crypto
Diffstat (limited to 'lib/crypto/c_src')
-rw-r--r--lib/crypto/c_src/crypto.c19
1 files changed, 14 insertions, 5 deletions
diff --git a/lib/crypto/c_src/crypto.c b/lib/crypto/c_src/crypto.c
index 1f69c3c27f..85614a84c2 100644
--- a/lib/crypto/c_src/crypto.c
+++ b/lib/crypto/c_src/crypto.c
@@ -706,12 +706,13 @@ static int get_bn_from_mpint(ErlNifEnv* env, ERL_NIF_TERM term, BIGNUM** bnp)
static ERL_NIF_TERM rand_uniform_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
{/* (Lo,Hi) */
- BIGNUM *bn_from, *bn_to, *bn_rand;
+ BIGNUM *bn_from = NULL, *bn_to, *bn_rand;
unsigned char* data;
unsigned dlen;
ERL_NIF_TERM ret;
if (!get_bn_from_mpint(env, argv[0], &bn_from)
|| !get_bn_from_mpint(env, argv[1], &bn_rand)) {
+ if (bn_from) BN_free(bn_from);
return enif_make_badarg(env);
}
@@ -770,7 +771,7 @@ static int inspect_mpint(ErlNifEnv* env, ERL_NIF_TERM term, ErlNifBinary* bin)
static ERL_NIF_TERM dss_verify(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
{/* (DigestType,Data,Signature,Key=[P, Q, G, Y]) */
ErlNifBinary data_bin, sign_bin;
- BIGNUM *dsa_p, *dsa_q, *dsa_g, *dsa_y;
+ BIGNUM *dsa_p = NULL, *dsa_q = NULL, *dsa_g = NULL, *dsa_y = NULL;
unsigned char hmacbuf[SHA_DIGEST_LENGTH];
ERL_NIF_TERM head, tail;
DSA *dsa;
@@ -786,6 +787,11 @@ static ERL_NIF_TERM dss_verify(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv
|| !enif_get_list_cell(env, tail, &head, &tail)
|| !get_bn_from_mpint(env, head, &dsa_y)
|| !enif_is_empty_list(env,tail)) {
+ badarg:
+ if (dsa_p) BN_free(dsa_p);
+ if (dsa_q) BN_free(dsa_q);
+ if (dsa_g) BN_free(dsa_g);
+ if (dsa_y) BN_free(dsa_y);
return enif_make_badarg(env);
}
if (argv[0] == atom_sha && inspect_mpint(env, argv[1], &data_bin)) {
@@ -796,7 +802,7 @@ static ERL_NIF_TERM dss_verify(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv
memcpy(hmacbuf, data_bin.data, SHA_DIGEST_LENGTH);
}
else {
- return enif_make_badarg(env);
+ goto badarg;
}
dsa = DSA_new();
@@ -1139,6 +1145,7 @@ static ERL_NIF_TERM rsa_public_crypt(ErlNifEnv* env, int argc, const ERL_NIF_TER
return enif_make_binary(env,&ret_bin);
}
else {
+ enif_release_binary(&ret_bin);
return atom_error;
}
}
@@ -1187,6 +1194,7 @@ static ERL_NIF_TERM rsa_private_crypt(ErlNifEnv* env, int argc, const ERL_NIF_TE
return enif_make_binary(env,&ret_bin);
}
else {
+ enif_release_binary(&ret_bin);
return atom_error;
}
}
@@ -1266,7 +1274,7 @@ static ERL_NIF_TERM dh_generate_key_nif(ErlNifEnv* env, int argc, const ERL_NIF_
|| !enif_get_list_cell(env, tail, &head, &tail)
|| !get_bn_from_mpint(env, head, &dh_params->g)
|| !enif_is_empty_list(env, tail)) {
-
+ DH_free(dh_params);
return enif_make_badarg(env);
}
@@ -1293,7 +1301,7 @@ static ERL_NIF_TERM dh_generate_key_nif(ErlNifEnv* env, int argc, const ERL_NIF_
static ERL_NIF_TERM dh_compute_key_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
{/* (OthersPublicKey, MyPrivateKey, DHParams=[P,G]) */
DH* dh_params = DH_new();
- BIGNUM* pubkey;
+ BIGNUM* pubkey = NULL;
int i;
ErlNifBinary ret_bin;
ERL_NIF_TERM ret, head, tail;
@@ -1321,6 +1329,7 @@ static ERL_NIF_TERM dh_compute_key_nif(ErlNifEnv* env, int argc, const ERL_NIF_T
ret = atom_error;
}
}
+ if (pubkey) BN_free(pubkey);
DH_free(dh_params);
return ret;
}