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

diff --git a/lib/libcrypto/ec/ec_ameth.c b/lib/libcrypto/ec/ec_ameth.c
index 2b3b3db..e6fe8bd 100644 (file)
--- a/lib/libcrypto/ec/ec_ameth.c
+++ b/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