1 files changed, 105 insertions, 0 deletions
diff --git a/include/mcl/ecdsa.h b/include/mcl/ecdsa.h
new file mode 100644
index 0000000..daeb6be
--- /dev/null
+++ b/include/mcl/ecdsa.h
@@ -0,0 +1,105 @@
+#pragma once
+/**
+	@file
+	@brief C interface of ECDSA
+	@author MITSUNARI Shigeo(@herumi)
+	@license modified new BSD license
+	http://opensource.org/licenses/BSD-3-Clause
+*/
+#include <stdint.h> // for uint64_t, uint8_t
+#include <stdlib.h> // for size_t
+
+#if defined(_MSC_VER)
+	#ifdef ECDSA_DLL_EXPORT
+		#define ECDSA_DLL_API __declspec(dllexport)
+	#else
+		#define ECDSA_DLL_API __declspec(dllimport)
+		#ifndef ECDSA_NO_AUTOLINK
+			#pragma comment(lib, "mclecdsa.lib")
+		#endif
+	#endif
+#elif defined(__EMSCRIPTEN__)
+	#define ECDSA_DLL_API __attribute__((used))
+#else
+	#define ECDSA_DLL_API
+#endif
+
+#ifndef mclSize
+	#ifdef __EMSCRIPTEN__
+		// avoid 64-bit integer
+		#define mclSize unsigned int
+		#define mclInt int
+	#else
+		// use #define for cgo
+		#define mclSize size_t
+		#define mclInt int64_t
+	#endif
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifdef ECDSA_NOT_DEFINE_STRUCT
+
+typedef struct ecdsaSecretKey ecdsaSecretKey;
+typedef struct ecdsaPublicKey ecdsaPublicKey;
+typedef struct ecdsaSignature ecdsaSignature;
+
+#else
+
+typedef struct {
+	uint64_t d[4];
+} ecdsaSecretKey;
+
+typedef struct {
+	uint64_t d[4 * 3];
+} ecdsaPublicKey;
+
+typedef struct {
+	uint64_t d[4 * 2];
+} ecdsaSignature;
+
+#endif
+
+struct ecdsaPrecomputedPublicKey;
+
+/*
+	init library
+	return 0 if success
+	@note not threadsafe
+*/
+ECDSA_DLL_API int ecdsaInit(void);
+
+// return written byte size if success else 0
+ECDSA_DLL_API mclSize ecdsaSecretKeySerialize(void *buf, mclSize maxBufSize, const ecdsaSecretKey *sec);
+ECDSA_DLL_API mclSize ecdsaPublicKeySerialize(void *buf, mclSize maxBufSize, const ecdsaPublicKey *pub);
+ECDSA_DLL_API mclSize ecdsaSignatureSerialize(void *buf, mclSize maxBufSize, const ecdsaSignature *sig);
+
+// return read byte size if sucess else 0
+ECDSA_DLL_API mclSize ecdsaSecretKeyDeserialize(ecdsaSecretKey* sec, const void *buf, mclSize bufSize);
+ECDSA_DLL_API mclSize ecdsaPublicKeyDeserialize(ecdsaPublicKey* pub, const void *buf, mclSize bufSize);
+ECDSA_DLL_API mclSize ecdsaSignatureDeserialize(ecdsaSignature* sig, const void *buf, mclSize bufSize);
+
+//	return 0 if success
+ECDSA_DLL_API int ecdsaSecretKeySetByCSPRNG(ecdsaSecretKey *sec);
+
+ECDSA_DLL_API void ecdsaGetPublicKey(ecdsaPublicKey *pub, const ecdsaSecretKey *sec);
+
+ECDSA_DLL_API void ecdsaSign(ecdsaSignature *sig, const ecdsaSecretKey *sec, const void *m, mclSize size);
+
+// return 1 if valid
+ECDSA_DLL_API int ecdsaVerify(const ecdsaSignature *sig, const ecdsaPublicKey *pub, const void *m, mclSize size);
+ECDSA_DLL_API int ecdsaVerifyPrecomputed(const ecdsaSignature *sig, const ecdsaPrecomputedPublicKey *pub, const void *m, mclSize size);
+
+// return nonzero if success
+ECDSA_DLL_API ecdsaPrecomputedPublicKey *ecdsaPrecomputedPublicKeyCreate();
+// call this function to avoid memory leak
+ECDSA_DLL_API void ecdsaPrecomputedPublicKeyDestroy(ecdsaPrecomputedPublicKey *ppub);
+// return 0 if success
+ECDSA_DLL_API int ecdsaPrecomputedPublicKeyInit(ecdsaPrecomputedPublicKey *ppub, const ecdsaPublicKey *pub);
+
+#ifdef __cplusplus
+}
+#endif
+