1 files changed, 84 insertions, 0 deletions
diff --git a/src/lib/crypto/bn_ossl.cpp b/src/lib/crypto/bn_ossl.cpp
new file mode 100644
index 0000000..34e1a3e
--- /dev/null
+++ b/src/lib/crypto/bn_ossl.cpp
@@ -0,0 +1,84 @@
+/*
+ * Copyright (c) 2021, [Ribose Inc](https://www.ribose.com).
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1.  Redistributions of source code must retain the above copyright notice,
+ *     this list of conditions and the following disclaimer.
+ *
+ * 2.  Redistributions in binary form must reproduce the above copyright notice,
+ *     this list of conditions and the following disclaimer in the documentation
+ *     and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdlib.h>
+#include <assert.h>
+#include "bn.h"
+#include "logging.h"
+
+/* store in unsigned [big endian] format */
+int
+bn_bn2bin(const bignum_t *a, unsigned char *b)
+{
+    if (!a || !b) {
+        return -1;
+    }
+    return BN_bn2bin(a, b) >= 0 ? 0 : -1;
+}
+
+bignum_t *
+mpi2bn(const pgp_mpi_t *val)
+{
+    assert(val);
+    if (!val) {
+        RNP_LOG("NULL val.");
+        return NULL;
+    }
+    bignum_t *res = bn_new();
+    if (!res) {
+        return NULL;
+    }
+    if (!BN_bin2bn(val->mpi, val->len, res)) {
+        bn_free(res);
+        res = NULL;
+    }
+    return res;
+}
+
+bool
+bn2mpi(const bignum_t *bn, pgp_mpi_t *val)
+{
+    val->len = bn_num_bytes(*bn);
+    return bn_bn2bin(bn, val->mpi) == 0;
+}
+
+bignum_t *
+bn_new(void)
+{
+    return BN_new();
+}
+
+void
+bn_free(bignum_t *a)
+{
+    BN_clear_free(a);
+}
+
+size_t
+bn_num_bytes(const bignum_t &a)
+{
+    return (BN_num_bits(&a) + 7) / 8;
+}