Fix a bundle of mischecks of return values

Several EVP_PKEY_xxxx functions return 0 and a negative value for
indicating errors. Some places call these functions with a zero return
value check only, which misses the check for the negative scenarios.

Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/10055)

apps/speed.c

diff --git a/apps/speed.c b/apps/speed.c
index 33f77d3..47e7d1b 100644
--- a/apps/speed.c
+++ b/apps/speed.c
@@ -3149,7 +3149,7 @@
                 pctx = NULL;
             }
             if (kctx == NULL ||      /* keygen ctx is not null */
-                !EVP_PKEY_keygen_init(kctx) /* init keygen ctx */ ) {
+                EVP_PKEY_keygen_init(kctx) <= 0/* init keygen ctx */ ) {
                 ecdh_checks = 0;
                 BIO_printf(bio_err, "ECDH keygen failure.\n");
                 ERR_print_errors(bio_err);
@@ -3157,12 +3157,12 @@
                 break;
             }
 
-            if (!EVP_PKEY_keygen(kctx, &key_A) || /* generate secret key A */
-                !EVP_PKEY_keygen(kctx, &key_B) || /* generate secret key B */
+            if (EVP_PKEY_keygen(kctx, &key_A) <= 0 || /* generate secret key A */
+                EVP_PKEY_keygen(kctx, &key_B) <= 0 || /* generate secret key B */
                 !(ctx = EVP_PKEY_CTX_new(key_A, NULL)) || /* derivation ctx from skeyA */
-                !EVP_PKEY_derive_init(ctx) || /* init derivation ctx */
-                !EVP_PKEY_derive_set_peer(ctx, key_B) || /* set peer pubkey in ctx */
-                !EVP_PKEY_derive(ctx, NULL, &outlen) || /* determine max length */
+                EVP_PKEY_derive_init(ctx) <= 0 || /* init derivation ctx */
+                EVP_PKEY_derive_set_peer(ctx, key_B) <= 0 || /* set peer pubkey in ctx */
+                EVP_PKEY_derive(ctx, NULL, &outlen) <= 0 || /* determine max length */
                 outlen == 0 ||  /* ensure outlen is a valid size */
                 outlen > MAX_ECDH_SIZE /* avoid buffer overflow */ ) {
                 ecdh_checks = 0;

crypto/cms/cms_kari.c

diff --git a/crypto/cms/cms_kari.c b/crypto/cms/cms_kari.c
index bffa935..3820d0e 100644
--- a/crypto/cms/cms_kari.c
+++ b/crypto/cms/cms_kari.c
@@ -162,7 +162,7 @@
     if (!pk)
         return 1;
     pctx = EVP_PKEY_CTX_new(pk, NULL);
-    if (!pctx || !EVP_PKEY_derive_init(pctx))
+    if (!pctx || EVP_PKEY_derive_init(pctx) <= 0)
         goto err;
     kari->pctx = pctx;
     return 1;