feat: add gmssl headers

include/gmssl/sm4_rng.h

@@ -0,0 +1,43 @@
+/*
+ *  Copyright 2014-2022 The GmSSL Project. All Rights Reserved.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the License); you may
+ *  not use this file except in compliance with the License.
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ */
+
+#ifndef GMSSL_SM4_RNG_H
+#define GMSSL_SM4_RNG_H
+
+#include <time.h>
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+#define SM4_RNG_MAX_RESEED_COUNTER (1<<20)
+#define SM4_RNG_MAX_RESEED_SECONDS 600
+
+typedef struct {
+	uint8_t V[16];
+	uint8_t K[16];
+	uint32_t reseed_counter;
+	time_t last_reseed_time;
+} SM4_RNG;
+
+
+int sm4_rng_init(SM4_RNG *rng, const uint8_t *nonce, size_t nonce_len,
+	const uint8_t *label, size_t label_len);
+int sm4_rng_update(SM4_RNG *rng, const uint8_t seed[32]);
+int sm4_rng_reseed(SM4_RNG *rng, const uint8_t *addin, size_t addin_len);
+int sm4_rng_generate(SM4_RNG *rng, const uint8_t *addin, size_t addin_len,
+	uint8_t *out, size_t outlen);
+
+
+#ifdef __cplusplus
+}
+#endif
+#endif