lib: rsa: free local arrays after use in rsa_gen_key_prop()
n, rr and rrtmp are used for internal calculations, but in the end
the results are copied into separately allocated elements of the
actual key_prop, so the n, rr and rrtmp elements are not used anymore
when returning from the function and should of course be freed.
Signed-off-by: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/lib/rsa/rsa-keyprop.c b/lib/rsa/rsa-keyprop.c
index cc0d2f9..1e83eed 100644
--- a/lib/rsa/rsa-keyprop.c
+++ b/lib/rsa/rsa-keyprop.c
@@ -654,17 +654,17 @@
{
struct rsa_key rsa_key;
uint32_t *n = NULL, *rr = NULL, *rrtmp = NULL;
- int rlen, i, ret;
+ int rlen, i, ret = 0;
*prop = calloc(sizeof(**prop), 1);
if (!(*prop)) {
ret = -ENOMEM;
- goto err;
+ goto out;
}
ret = rsa_parse_pub_key(&rsa_key, key, keylen);
if (ret)
- goto err;
+ goto out;
/* modulus */
/* removing leading 0's */
@@ -674,7 +674,7 @@
(*prop)->modulus = malloc(rsa_key.n_sz - i);
if (!(*prop)->modulus) {
ret = -ENOMEM;
- goto err;
+ goto out;
}
memcpy((void *)(*prop)->modulus, &rsa_key.n[i], rsa_key.n_sz - i);
@@ -683,14 +683,14 @@
rrtmp = calloc(sizeof(uint32_t), 2 + (((*prop)->num_bits * 2) >> 5));
if (!n || !rr || !rrtmp) {
ret = -ENOMEM;
- goto err;
+ goto out;
}
/* exponent */
(*prop)->public_exponent = calloc(1, sizeof(uint64_t));
if (!(*prop)->public_exponent) {
ret = -ENOMEM;
- goto err;
+ goto out;
}
memcpy((void *)(*prop)->public_exponent + sizeof(uint64_t)
- rsa_key.e_sz,
@@ -714,16 +714,15 @@
(*prop)->rr = malloc(rlen);
if (!(*prop)->rr) {
ret = -ENOMEM;
- goto err;
+ goto out;
}
br_i32_encode((void *)(*prop)->rr, rlen, rr);
- return 0;
-
-err:
+out:
free(n);
free(rr);
free(rrtmp);
- rsa_free_key_prop(*prop);
+ if (ret < 0)
+ rsa_free_key_prop(*prop);
return ret;
}