spqlios basic wrapper

spqlios/lib/test/testlib/sha3.h

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+// sha3.h
+// 19-Nov-11  Markku-Juhani O. Saarinen <mjos@iki.fi>
+// https://github.com/mjosaarinen/tiny_sha3
+// License: MIT
+
+#ifndef SHA3_H
+#define SHA3_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stddef.h>
+#include <stdint.h>
+
+#ifndef KECCAKF_ROUNDS
+#define KECCAKF_ROUNDS 24
+#endif
+
+#ifndef ROTL64
+#define ROTL64(x, y) (((x) << (y)) | ((x) >> (64 - (y))))
+#endif
+
+// state context
+typedef struct {
+  union {            // state:
+    uint8_t b[200];  // 8-bit bytes
+    uint64_t q[25];  // 64-bit words
+  } st;
+  int pt, rsiz, mdlen;  // these don't overflow
+} sha3_ctx_t;
+
+// Compression function.
+void sha3_keccakf(uint64_t st[25]);
+
+// OpenSSL - like interfece
+int sha3_init(sha3_ctx_t* c, int mdlen);  // mdlen = hash output in bytes
+int sha3_update(sha3_ctx_t* c, const void* data, size_t len);
+int sha3_final(void* md, sha3_ctx_t* c);  // digest goes to md
+
+// compute a sha3 hash (md) of given byte length from "in"
+void* sha3(const void* in, size_t inlen, void* md, int mdlen);
+
+// SHAKE128 and SHAKE256 extensible-output functions
+#define shake128_init(c) sha3_init(c, 16)
+#define shake256_init(c) sha3_init(c, 32)
+#define shake_update sha3_update
+
+void shake_xof(sha3_ctx_t* c);
+void shake_out(sha3_ctx_t* c, void* out, size_t len);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif  // SHA3_H