Add d2i_KeyParams/i2d_KeyParams API's.

Convert EVP_PKEY Parameters to/from binary.
This wraps the low level i2d/d2i calls for DH,DSA and EC key parameters
in a similar way to Public and Private Keys.
The API's can be used by applications (including openssl apps) that only
want to use EVP_PKEY without needing to access low level key API's.

Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/8903)

1 files changed, 73 insertions, 0 deletions

diff --git a/test/evp_pkey_dparams_test.c b/test/evp_pkey_dparams_test.c
new file mode 100644
index 0000000000..30da6ed8b1
--- /dev/null
+++ b/test/evp_pkey_dparams_test.c
@@ -0,0 +1,73 @@
+/*
+ * Copyright 2019 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License 2.0 (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "internal/nelem.h"
+#include <openssl/crypto.h>
+#include <openssl/bio.h>
+#include <openssl/bn.h>
+#include <openssl/rand.h>
+#include <openssl/err.h>
+#include <openssl/evp.h>
+#include <openssl/ec.h>
+#include "testutil.h"
+
+static int pkey_param_types[] = {
+#ifndef OPENSSL_NO_DH
+    EVP_PKEY_DH,
+#endif
+#ifndef OPENSSL_NO_DSA
+    EVP_PKEY_DSA,
+#endif
+#ifndef OPENSSL_NO_EC
+    EVP_PKEY_EC
+#endif
+};
+
+#if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_EC)
+
+static int params_bio_test(int id)
+{
+    int ret;
+    BIO *mem_bio = NULL;
+    EVP_PKEY_CTX *ctx = NULL;
+    EVP_PKEY *params_key = NULL, *out_key = NULL;
+    int type = pkey_param_types[id];
+
+    ret =
+        TEST_ptr(mem_bio = BIO_new(BIO_s_mem()))
+        && TEST_ptr(ctx = EVP_PKEY_CTX_new_id(type, NULL))
+        && TEST_int_gt(EVP_PKEY_paramgen_init(ctx), 0)
+        && (type != EVP_PKEY_EC
+           || EVP_PKEY_CTX_set_ec_paramgen_curve_nid(ctx, NID_secp256k1) > 0)
+        && TEST_int_gt(EVP_PKEY_paramgen(ctx, &params_key), 0)
+        && TEST_int_gt(i2d_KeyParams_bio(mem_bio, params_key), 0)
+        && TEST_ptr(d2i_KeyParams_bio(type, &out_key, mem_bio))
+        && TEST_int_gt(EVP_PKEY_cmp_parameters(out_key, params_key), 0);
+
+    BIO_free(mem_bio);
+    EVP_PKEY_CTX_free(ctx);
+    EVP_PKEY_free(params_key);
+    EVP_PKEY_free(out_key);
+    return ret;
+}
+#endif
+
+int setup_tests(void)
+{
+#if defined(OPENSSL_NO_DH) && defined(OPENSSL_NO_DSA) && defined(OPENSSL_NO_EC)
+    TEST_note("No DH/DSA/EC support");
+#else
+    ADD_ALL_TESTS(params_bio_test, OSSL_NELEM(pkey_param_types));
+#endif
+    return 1;
+}