Add support for EVP_PKEY_derive in evp_test

Reviewed-by: NViktor Dukhovni <viktor@openssl.org>

test/evp_test.c

@@ -293,6 +293,7 @@ static const struct evp_test_method mac_test_method;
 static const struct evp_test_method psign_test_method, pverify_test_method;
 static const struct evp_test_method pdecrypt_test_method;
 static const struct evp_test_method pverify_recover_test_method;
+static const struct evp_test_method pderive_test_method;
 static const struct evp_test_method pbe_test_method;
 static const struct evp_test_method encode_test_method;
 static const struct evp_test_method kdf_test_method;
@@ -305,6 +306,7 @@ static const struct evp_test_method *evp_test_list[] = {
     &pverify_test_method,
     &pdecrypt_test_method,
     &pverify_recover_test_method,
+    &pderive_test_method,
     &pbe_test_method,
     &encode_test_method,
     &kdf_test_method,
@@ -1339,6 +1341,75 @@ static const struct evp_test_method pverify_test_method = {
     verify_test_run
 };
 
+
+static int pderive_test_init(struct evp_test *t, const char *name)
+{
+    return pkey_test_init(t, name, 0, EVP_PKEY_derive_init, 0);
+}
+
+static int pderive_test_parse(struct evp_test *t,
+                              const char *keyword, const char *value)
+{
+    struct pkey_data *kdata = t->data;
+
+    if (strcmp(keyword, "PeerKey") == 0) {
+        EVP_PKEY *peer;
+        if (find_key(&peer, value, t->public) == 0)
+            return 0;
+        if (EVP_PKEY_derive_set_peer(kdata->ctx, peer) <= 0)
+            return 0;
+        return 1;
+    }
+    if (strcmp(keyword, "SharedSecret") == 0)
+        return test_bin(value, &kdata->output, &kdata->output_len);
+    if (strcmp(keyword, "Ctrl") == 0) {
+        char *p = strchr(value, ':');
+        if (p)
+            *p++ = 0;
+        if (EVP_PKEY_CTX_ctrl_str(kdata->ctx, value, p) <= 0)
+            return 0;
+        return 1;
+    }
+    return 0;
+}
+
+static int pderive_test_run(struct evp_test *t)
+{
+    struct pkey_data *kdata = t->data;
+    unsigned char *out = NULL;
+    size_t out_len;
+    const char *err = "INTERNAL_ERROR";
+
+    out_len = kdata->output_len;
+    out = OPENSSL_malloc(out_len);
+    if (!out) {
+        fprintf(stderr, "Error allocating output buffer!\n");
+        exit(1);
+    }
+    err = "DERIVE_ERROR";
+    if (EVP_PKEY_derive(kdata->ctx, out, &out_len) <= 0)
+        goto err;
+    err = "SHARED_SECRET_LENGTH_MISMATCH";
+    if (out_len != kdata->output_len)
+        goto err;
+    err = "SHARED_SECRET_MISMATCH";
+    if (check_output(t, kdata->output, out, out_len))
+        goto err;
+    err = NULL;
+ err:
+    OPENSSL_free(out);
+    t->err = err;
+    return 1;
+}
+
+static const struct evp_test_method pderive_test_method = {
+    "Derive",
+    pderive_test_init,
+    pkey_test_cleanup,
+    pderive_test_parse,
+    pderive_test_run
+};
+
 /* PBE tests */
 
 #define PBE_TYPE_SCRYPT 1