1 files changed, 64 insertions, 0 deletions
diff --git a/src/lib/crypto/bn.h b/src/lib/crypto/bn.h
new file mode 100644
index 0000000..26cc547
--- /dev/null
+++ b/src/lib/crypto/bn.h
@@ -0,0 +1,64 @@
+/*-
+ * Copyright (c) 2017-2021 Ribose Inc.
+ * Copyright (c) 2012 Alistair Crooks <agc@NetBSD.org>
+ * 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 AUTHOR ``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 AUTHOR 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.
+ */
+
+#ifndef RNP_BN_H_
+#define RNP_BN_H_
+
+#include <stdio.h>
+#include <stdint.h>
+#include "config.h"
+#include "mpi.h"
+
+#if defined(CRYPTO_BACKEND_OPENSSL)
+#include <openssl/bn.h>
+
+#define bignum_t BIGNUM
+#elif defined(CRYPTO_BACKEND_BOTAN)
+typedef struct botan_mp_struct *botan_mp_t;
+typedef struct bignum_t_st {
+    botan_mp_t mp;
+} bignum_t;
+
+#define BN_HANDLE(x) ((x).mp)
+#define BN_HANDLE_PTR(x) ((x)->mp)
+#else
+#error "Unknown crypto backend."
+#endif
+
+/*********************************/
+
+bignum_t *bn_new(void);
+void      bn_free(bignum_t * /*a*/);
+
+int bn_bn2bin(const bignum_t * /*a*/, unsigned char * /*b*/);
+
+bignum_t *mpi2bn(const pgp_mpi_t *val);
+
+bool bn2mpi(const bignum_t *bn, pgp_mpi_t *val);
+
+size_t bn_num_bytes(const bignum_t &a);
+
+#endif