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include/ppr_blake2s.h

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+/*
+   BLAKE2 reference source code package - reference C implementations
+
+   Copyright 2012, Samuel Neves <sneves@dei.uc.pt>.  You may use this under the
+   terms of the CC0, the OpenSSL Licence, or the Apache Public License 2.0, at
+   your option.  The terms of these licenses can be found at:
+
+   - CC0 1.0 Universal : http://creativecommons.org/publicdomain/zero/1.0
+   - OpenSSL license   : https://www.openssl.org/source/license.html
+   - Apache 2.0        : http://www.apache.org/licenses/LICENSE-2.0
+
+   More information about the BLAKE2 hash function can be found at
+   https://blake2.net.
+*/
+#ifndef PPR_BLAKE2S_H
+#define PPR_BLAKE2S_H
+
+#include <ppr_machdep.h>
+
+enum ppr_blake2s_constant {
+	BLAKE2S_BLOCKBYTES    = 64,
+	BLAKE2S_OUTBYTES      = 32,
+	BLAKE2S_KEYBYTES      = 32,
+	BLAKE2S_SALTBYTES     = 8,
+	BLAKE2S_PERSONALBYTES = 8
+};
+
+typedef struct ppr_blake2s_state__ {
+	ppr_uint32_t h[8];
+	ppr_uint32_t t[2];
+	ppr_uint32_t f[2];
+	ppr_uint8_t  buf[BLAKE2S_BLOCKBYTES];
+	ppr_size_t   buflen;
+	ppr_size_t   outlen;
+	ppr_uint8_t  last_node;
+} ppr_blake2s_state;
+
+#ifdef PPR_HAS_PACK
+#pragma pack(1)
+#endif
+struct ppr_blake2s_param__ {
+	ppr_uint8_t  digest_length; /* 1 */
+	ppr_uint8_t  key_length;    /* 2 */
+	ppr_uint8_t  fanout;	    /* 3 */
+	ppr_uint8_t  depth;	    /* 4 */
+	ppr_uint32_t leaf_length;   /* 8 */
+	ppr_uint32_t node_offset;   /* 12 */
+	ppr_uint16_t xof_length;    /* 14 */
+	ppr_uint8_t  node_depth;    /* 15 */
+	ppr_uint8_t  inner_length;  /* 16 */
+	/* ppr_uint8_t  reserved[0]; */
+	ppr_uint8_t salt[BLAKE2S_SALTBYTES];	     /* 24 */
+	ppr_uint8_t personal[BLAKE2S_PERSONALBYTES]; /* 32 */
+};
+#ifdef PPR_HAS_PACK
+#pragma pack()
+#endif
+
+typedef struct ppr_blake2s_param__ ppr_blake2s_param;
+
+#if 0
+  /* Padded structs result in a compile-time error */
+  enum {
+    BLAKE2_DUMMY_1 = 1/(int)(sizeof(ppr_blake2s_param) == BLAKE2S_OUTBYTES)
+  };
+#endif
+
+/* Streaming API */
+int ppr_blake2s_init(ppr_blake2s_state* S, ppr_size_t outlen);
+int ppr_blake2s_init_key(ppr_blake2s_state* S, ppr_size_t outlen, const void* key, ppr_size_t keylen);
+int ppr_blake2s_init_param(ppr_blake2s_state* S, const ppr_blake2s_param* P);
+int ppr_blake2s_update(ppr_blake2s_state* S, const void* in, ppr_size_t inlen);
+int ppr_blake2s_final(ppr_blake2s_state* S, void* out, ppr_size_t outlen);
+
+/* Simple API */
+int ppr_blake2s(void* out, ppr_size_t outlen, const void* in, ppr_size_t inlen, const void* key, ppr_size_t keylen);
+
+#endif