feat: add gmssl headers

include/gmssl/hmac.h

@@ -0,0 +1,47 @@
+/*
+ *  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_HMAC_H
+#define GMSSL_HMAC_H
+
+#include <string.h>
+#include <gmssl/digest.h>
+
+
+#ifdef  __cplusplus
+extern "C" {
+#endif
+
+#define HMAC_MAX_SIZE	(DIGEST_MAX_SIZE)
+
+
+typedef struct hmac_ctx_st {
+	const DIGEST *digest;
+	DIGEST_CTX digest_ctx;
+	DIGEST_CTX i_ctx;
+	DIGEST_CTX o_ctx;
+} HMAC_CTX;
+
+
+size_t hmac_size(const HMAC_CTX *ctx);
+
+int hmac_init(HMAC_CTX *ctx, const DIGEST *digest, const uint8_t *key, size_t keylen);
+int hmac_update(HMAC_CTX *ctx, const uint8_t *data, size_t datalen);
+int hmac_finish(HMAC_CTX *ctx, uint8_t *mac, size_t *maclen);
+
+int hmac(const DIGEST *md, const uint8_t *key, size_t keylen,
+	const uint8_t *data, size_t dlen,
+	uint8_t *mac, size_t *maclen);
+
+
+#ifdef  __cplusplus
+}
+#endif
+#endif