Clean up eckey_param_decode()

This aligns eckey's parameter decoding routine with the one of other
cipher abstractions: better variable names, single exit and add missing
check for EVP_PKEY_assign_EC_KEY().

ok jsing

1 files changed, 16 insertions, 9 deletions

diff --git a/src/lib/libcrypto/ec/ec_ameth.c b/src/lib/libcrypto/ec/ec_ameth.c
index 2b3b3db63d..e6fe8bd370 100644
--- a/src/lib/libcrypto/ec/ec_ameth.c
+++ b/src/lib/libcrypto/ec/ec_ameth.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: ec_ameth.c,v 1.47 2023/12/29 18:46:24 tb Exp $ */
+/* $OpenBSD: ec_ameth.c,v 1.48 2023/12/29 18:47:47 tb Exp $ */
 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
  * project 2006.
  */
@@ -551,16 +551,23 @@ do_EC_KEY_print(BIO *bp, const EC_KEY *x, int off, int ktype)
 }
 
 static int
-eckey_param_decode(EVP_PKEY *pkey,
-    const unsigned char **pder, int derlen)
+eckey_param_decode(EVP_PKEY *pkey, const unsigned char **param, int param_len)
 {
         EC_KEY *eckey;
-        if (!(eckey = d2i_ECParameters(NULL, pder, derlen))) {
-                ECerror(ERR_R_EC_LIB);
-                return 0;
-        }
-        EVP_PKEY_assign_EC_KEY(pkey, eckey);
-        return 1;
+        int ret = 0;
+
+        if ((eckey = d2i_ECParameters(NULL, param, param_len)) == NULL)
+                goto err;
+        if (!EVP_PKEY_assign_EC_KEY(pkey, eckey))
+                goto err;
+        eckey = NULL;
+
+        ret = 1;
+
+ err:
+        EC_KEY_free(eckey);
+
+        return ret;
 }
 
 static int