feat: add gmssl headers

include/gmssl/hash_drbg.h

@@ -0,0 +1,79 @@
+/*
+ *  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
+ */
+
+
+/* NIST SP800-90A Rev.1 "Recommendation for Random Number Generation
+ * Using Deterministic Random Bit Generators", 10.1.1 Hash_DRBG */
+
+#ifndef GMSSL_HASH_DRBG_H
+#define GMSSL_HASH_DRBG_H
+
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <gmssl/digest.h>
+
+
+/* seedlen for hash_drgb, table 2 of nist sp 800-90a rev.1 */
+#define HASH_DRBG_SM3_SEED_BITS		440 /* 55 bytes */
+#define HASH_DRBG_SHA1_SEED_BITS	440
+#define HASH_DRBG_SHA224_SEED_BITS	440
+#define HASH_DRBG_SHA512_224_SEED_BITS	440
+#define HASH_DRBG_SHA256_SEED_BITS	440
+#define HASH_DRBG_SHA512_256_SEED_BITS	440
+#define HASH_DRBG_SHA384_SEED_BITS	888 /* 110 bytes */
+#define HASH_DRBG_SHA512_SEED_BITS	888
+#define HASH_DRBG_MAX_SEED_BITS		888
+
+#define HASH_DRBG_SM3_SEED_SIZE		(HASH_DRBG_SM3_SEED_BITS/8)
+#define HASH_DRBG_SHA1_SEED_SIZE	(HASH_DRBG_SHA1_SEED_BITS/8)
+#define HASH_DRBG_SHA224_SEED_SIZE	(HASH_DRBG_SHA224_SEED_BITS/8)
+#define HASH_DRBG_SHA512_224_SEED_SIZE	(HASH_DRBG_SHA512_224_SEED_BITS/8)
+#define HASH_DRBG_SHA256_SEED_SIZE	(HASH_DRBG_SHA256_SEED_BITS/8)
+#define HASH_DRBG_SHA512_256_SEED_SIZE	(HASH_DRBG_SHA512_256_SEED_BITS/8)
+#define HASH_DRBG_SHA384_SEED_SIZE	(HASH_DRBG_SHA384_SEED_BITS/8)
+#define HASH_DRBG_SHA512_SEED_SIZE	(HASH_DRBG_SHA512_SEED_BITS/8)
+#define HASH_DRBG_MAX_SEED_SIZE		(HASH_DRBG_MAX_SEED_BITS/8)
+
+#define HASH_DRBG_RESEED_INTERVAL	((uint64_t)1 << 48)
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+typedef struct {
+	const DIGEST *digest;
+	uint8_t V[HASH_DRBG_MAX_SEED_SIZE];
+	uint8_t C[HASH_DRBG_MAX_SEED_SIZE];
+	size_t seedlen;
+	uint64_t reseed_counter;
+} HASH_DRBG;
+
+
+int hash_drbg_init(HASH_DRBG *drbg,
+	const DIGEST *digest,
+	const uint8_t *entropy, size_t entropy_len,
+	const uint8_t *nonce, size_t nonce_len,
+	const uint8_t *personalstr, size_t personalstr_len);
+
+int hash_drbg_reseed(HASH_DRBG *drbg,
+	const uint8_t *entropy, size_t entropy_len,
+	const uint8_t *additional, size_t additional_len);
+
+int hash_drbg_generate(HASH_DRBG *drbg,
+	const uint8_t *additional, size_t additional_len,
+	size_t outlen, uint8_t *out);
+
+
+
+#ifdef __cplusplus
+}
+#endif
+#endif