Added a bignum library to abstract possible implementations.

1 files changed, 40 insertions, 0 deletions

diff --git a/libcmix-bignum/bignum.h b/libcmix-bignum/bignum.h
new file mode 100644
index 0000000..02efcf7
--- /dev/null
+++ b/libcmix-bignum/bignum.h
@@ -0,0 +1,40 @@
+#pragma once
+
+#include <stddef.h>
+#include <stdlib.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+enum bignum_error {
+	NoError = 0,
+	error = -1
+};
+
+struct Bignum {
+	unsigned char* data;
+	size_t len;
+};
+
+struct Bignum allocate_bignum(size_t len) {
+	return (struct Bignum){
+		(unsigned char*) malloc(len),
+		len
+	};
+}
+
+void free_bignum(struct Bignum* b) {
+	free(b->data);
+	b->data = 0;
+	b->len = 0;
+}
+
+extern enum bignum_error get_curve25519_mod(struct Bignum* result);
+
+extern enum bignum_error multiply_mod(struct Bignum* result, struct Bignum const lh, struct Bignum const rh, struct Bignum const mod);
+
+
+#ifdef __cplusplus
+}
+#endif
\ No newline at end of file