Make ossl_ecdsa_verify_sig() single exit

ok beck jsing

diff --git a/lib/libcrypto/ecdsa/ecs_ossl.c b/lib/libcrypto/ecdsa/ecs_ossl.c
index 83be5fd..879027f 100644 (file)
--- a/lib/libcrypto/ecdsa/ecs_ossl.c
+++ b/lib/libcrypto/ecdsa/ecs_ossl.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: ecs_ossl.c,v 1.50 2023/07/03 09:59:20 tb Exp $ */
+/* $OpenBSD: ecs_ossl.c,v 1.51 2023/07/03 10:04:05 tb Exp $ */
 /*
  * Written by Nils Larsch for the OpenSSL project
  */
@@ -456,7 +456,7 @@ int
 ossl_ecdsa_verify_sig(const unsigned char *dgst, int dgst_len, const ECDSA_SIG *sig,
     EC_KEY *eckey)
 {
-       BN_CTX *ctx;
+       BN_CTX *ctx = NULL;
        BIGNUM *u1, *u2, *m, *x;
        EC_POINT *point = NULL;
        const EC_GROUP *group;
@@ -467,12 +467,12 @@ ossl_ecdsa_verify_sig(const unsigned char *dgst, int dgst_len, const ECDSA_SIG *
        if (eckey == NULL || (group = EC_KEY_get0_group(eckey)) == NULL ||
            (pub_key = EC_KEY_get0_public_key(eckey)) == NULL || sig == NULL) {
                ECDSAerror(ECDSA_R_MISSING_PARAMETERS);
-               return -1;
+               goto err;
        }
 
        if ((ctx = BN_CTX_new()) == NULL) {
                ECDSAerror(ERR_R_MALLOC_FAILURE);
-               return -1;
+               goto err;
        }
        BN_CTX_start(ctx);
        u1 = BN_CTX_get(ctx);