PROV SERIALIZER: add support for writing DSA keys and parameters

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/10394)

1 files changed, 151 insertions, 0 deletions

diff --git a/providers/implementations/serializers/serializer_dsa_pub.c b/providers/implementations/serializers/serializer_dsa_pub.c
new file mode 100644
index 0000000000..0901718a93
--- /dev/null
+++ b/providers/implementations/serializers/serializer_dsa_pub.c
@@ -0,0 +1,151 @@
+/*
+ * 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 <openssl/core_numbers.h>
+#include <openssl/err.h>
+#include <openssl/pem.h>
+#include <openssl/dsa.h>
+#include <openssl/types.h>
+#include <openssl/params.h>
+#include "prov/bio.h"
+#include "prov/implementations.h"
+#include "serializer_local.h"
+
+static OSSL_OP_serializer_newctx_fn dsa_pub_newctx;
+static OSSL_OP_serializer_freectx_fn dsa_pub_freectx;
+static OSSL_OP_serializer_serialize_data_fn dsa_pub_der_data;
+static OSSL_OP_serializer_serialize_object_fn dsa_pub_der;
+static OSSL_OP_serializer_serialize_data_fn dsa_pub_pem_data;
+static OSSL_OP_serializer_serialize_object_fn dsa_pub_pem;
+
+static OSSL_OP_serializer_serialize_data_fn dsa_pub_print_data;
+static OSSL_OP_serializer_serialize_object_fn dsa_pub_print;
+
+/* Public key : context */
+
+/*
+ * There's no specific implementation context, so we use the provider context
+ */
+static void *dsa_pub_newctx(void *provctx)
+{
+    return provctx;
+}
+
+static void dsa_pub_freectx(void *ctx)
+{
+}
+
+/* Public key : DER */
+static int dsa_pub_der_data(void *ctx, const OSSL_PARAM params[], BIO *out,
+                            OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
+{
+    OSSL_OP_keymgmt_importkey_fn *dsa_importkey =
+        ossl_prov_get_dsa_importkey();
+    int ok = 0;
+
+    if (dsa_importkey != NULL) {
+        DSA *dsa = dsa_importkey(ctx, params); /* ctx == provctx */
+
+        ok = dsa_pub_der(ctx, dsa, out, cb, cbarg);
+        DSA_free(dsa);
+    }
+    return ok;
+}
+
+static int dsa_pub_der(void *ctx, void *dsa, BIO *out,
+                       OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
+{
+    /*
+     * TODO(v3.0) implement setting save_parameters, see dsa_pub_encode()
+     * in crypto/dsa/dsa_ameth.c
+     */
+    int save_parameters = 1;
+
+    return
+        save_parameters
+        ? ossl_prov_write_pub_der_from_obj(out, dsa, EVP_PKEY_DSA,
+                                           ossl_prov_prepare_all_dsa_params,
+                                           ossl_prov_dsa_pub_to_der)
+        : ossl_prov_write_pub_der_from_obj(out, dsa, EVP_PKEY_DSA,
+                                           ossl_prov_prepare_dsa_params,
+                                           ossl_prov_dsa_pub_to_der);
+
+}
+
+/* Public key : PEM */
+static int dsa_pub_pem_data(void *ctx, const OSSL_PARAM params[], BIO *out,
+                            OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
+{
+    OSSL_OP_keymgmt_importkey_fn *dsa_importkey =
+        ossl_prov_get_dsa_importkey();
+    int ok = 0;
+
+    if (dsa_importkey != NULL) {
+        DSA *dsa = dsa_importkey(ctx, params); /* ctx == provctx */
+
+        ok = dsa_pub_pem(ctx, dsa, out, cb, cbarg);
+        DSA_free(dsa);
+    }
+    return ok;
+}
+
+static int dsa_pub_pem(void *ctx, void *dsa, BIO *out,
+                       OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
+{
+    return ossl_prov_write_pub_pem_from_obj(out, dsa, EVP_PKEY_DSA,
+                                            ossl_prov_prepare_dsa_params,
+                                            ossl_prov_dsa_pub_to_der);
+}
+
+static int dsa_pub_print_data(void *ctx, const OSSL_PARAM params[], BIO *out,
+                              OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
+{
+    OSSL_OP_keymgmt_importkey_fn *dsa_importkey =
+        ossl_prov_get_dsa_importkey();
+    int ok = 0;
+
+    if (dsa_importkey != NULL) {
+        DSA *dsa = dsa_importkey(ctx, params); /* ctx == provctx */
+
+        ok = dsa_pub_print(ctx, dsa, out, cb, cbarg);
+        DSA_free(dsa);
+    }
+    return ok;
+}
+
+static int dsa_pub_print(void *ctx, void *dsa, BIO *out,
+                         OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
+{
+    return ossl_prov_print_dsa(out, dsa, 0);
+}
+
+const OSSL_DISPATCH dsa_pub_der_serializer_functions[] = {
+    { OSSL_FUNC_SERIALIZER_NEWCTX, (void (*)(void))dsa_pub_newctx },
+    { OSSL_FUNC_SERIALIZER_FREECTX, (void (*)(void))dsa_pub_freectx },
+    { OSSL_FUNC_SERIALIZER_SERIALIZE_DATA, (void (*)(void))dsa_pub_der_data },
+    { OSSL_FUNC_SERIALIZER_SERIALIZE_OBJECT, (void (*)(void))dsa_pub_der },
+    { 0, NULL }
+};
+
+const OSSL_DISPATCH dsa_pub_pem_serializer_functions[] = {
+    { OSSL_FUNC_SERIALIZER_NEWCTX, (void (*)(void))dsa_pub_newctx },
+    { OSSL_FUNC_SERIALIZER_FREECTX, (void (*)(void))dsa_pub_freectx },
+    { OSSL_FUNC_SERIALIZER_SERIALIZE_DATA, (void (*)(void))dsa_pub_pem_data },
+    { OSSL_FUNC_SERIALIZER_SERIALIZE_OBJECT, (void (*)(void))dsa_pub_pem },
+    { 0, NULL }
+};
+
+const OSSL_DISPATCH dsa_pub_text_serializer_functions[] = {
+    { OSSL_FUNC_SERIALIZER_NEWCTX, (void (*)(void))dsa_pub_newctx },
+    { OSSL_FUNC_SERIALIZER_FREECTX, (void (*)(void))dsa_pub_freectx },
+    { OSSL_FUNC_SERIALIZER_SERIALIZE_OBJECT, (void (*)(void))dsa_pub_print },
+    { OSSL_FUNC_SERIALIZER_SERIALIZE_DATA,
+      (void (*)(void))dsa_pub_print_data },
+    { 0, NULL }
+};