1 files changed, 63 insertions, 0 deletions
diff --git a/providers/implementations/encode_decode/encoder_ffc_params.c b/providers/implementations/encode_decode/encoder_ffc_params.c
new file mode 100644
index 0000000000..67ec50c9b8
--- /dev/null
+++ b/providers/implementations/encode_decode/encoder_ffc_params.c
@@ -0,0 +1,63 @@
+/*
+ * Copyright 2020 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
+ */
+
+/* Utility function for printing DSA/DH params. */
+
+#include "prov/bio.h"
+#include "encoder_local.h"
+
+int ffc_params_prov_print(BIO *out, const FFC_PARAMS *ffc)
+{
+    if (ffc->nid != NID_undef) {
+#ifndef OPENSSL_NO_DH
+        const char *name = ffc_named_group_from_uid(ffc->nid);
+
+        if (name == NULL)
+            goto err;
+        if (BIO_printf(out, "GROUP: %s\n", name) <= 0)
+            goto err;
+        return 1;
+#else
+        /* How could this be? We should not have a nid in a no-dh build. */
+        goto err;
+#endif
+    }
+
+    if (!ossl_prov_print_labeled_bignum(out, "P:   ", ffc->p))
+        goto err;
+    if (ffc->q != NULL) {
+        if (!ossl_prov_print_labeled_bignum(out, "Q:   ", ffc->q))
+            goto err;
+    }
+    if (!ossl_prov_print_labeled_bignum(out, "G:   ", ffc->g))
+        goto err;
+    if (ffc->j != NULL) {
+        if (!ossl_prov_print_labeled_bignum(out, "J:   ", ffc->j))
+            goto err;
+    }
+    if (ffc->seed != NULL) {
+        if (!ossl_prov_print_labeled_buf(out, "SEED:", ffc->seed, ffc->seedlen))
+            goto err;
+    }
+    if (ffc->gindex != -1) {
+        if (BIO_printf(out, "gindex: %d\n", ffc->gindex) <= 0)
+            goto err;
+    }
+    if (ffc->pcounter != -1) {
+        if (BIO_printf(out, "pcounter: %d\n", ffc->pcounter) <= 0)
+            goto err;
+    }
+    if (ffc->h != 0) {
+        if (BIO_printf(out, "h: %d\n", ffc->h) <= 0)
+            goto err;
+    }
+    return 1;
+err:
+    return 0;
+}