1 files changed, 58 insertions, 0 deletions
diff --git a/src/lib/crypto/mpi.h b/src/lib/crypto/mpi.h
new file mode 100644
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--- /dev/null
+++ b/src/lib/crypto/mpi.h
@@ -0,0 +1,58 @@
+/*-
+ * Copyright (c) 2018 Ribose Inc.
+ * 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 HOLDERS 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.
+ */
+
+#ifndef RNP_MPI_H_
+#define RNP_MPI_H_
+
+#include <cstdint>
+#include <cstdbool>
+#include <cstddef>
+
+/* 16384 bits should be pretty enough for now */
+#define PGP_MPINT_BITS (16384)
+#define PGP_MPINT_SIZE (PGP_MPINT_BITS >> 3)
+
+/** multi-precision integer, used in signatures and public/secret keys */
+typedef struct pgp_mpi_t {
+    uint8_t mpi[PGP_MPINT_SIZE];
+    size_t  len;
+} pgp_mpi_t;
+
+bool mem2mpi(pgp_mpi_t *val, const void *mem, size_t len);
+
+void mpi2mem(const pgp_mpi_t *val, void *mem);
+
+char *mpi2hex(const pgp_mpi_t *val);
+
+size_t mpi_bits(const pgp_mpi_t *val);
+
+size_t mpi_bytes(const pgp_mpi_t *val);
+
+bool mpi_equal(const pgp_mpi_t *val1, const pgp_mpi_t *val2);
+
+void mpi_forget(pgp_mpi_t *val);
+
+#endif // MPI_H_