dedup

deduplicating backup program
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blake2.h (6455B)


      1 /*
      2    BLAKE2 reference source code package - reference C implementations
      3 
      4    Copyright 2012, Samuel Neves <sneves@dei.uc.pt>.  You may use this under the
      5    terms of the CC0, the OpenSSL Licence, or the Apache Public License 2.0, at
      6    your option.  The terms of these licenses can be found at:
      7 
      8    - CC0 1.0 Universal : http://creativecommons.org/publicdomain/zero/1.0
      9    - OpenSSL license   : https://www.openssl.org/source/license.html
     10    - Apache 2.0        : http://www.apache.org/licenses/LICENSE-2.0
     11 
     12    More information about the BLAKE2 hash function can be found at
     13    https://blake2.net.
     14 */
     15 #ifndef BLAKE2_H
     16 #define BLAKE2_H
     17 
     18 #include <stddef.h>
     19 #include <stdint.h>
     20 
     21 #if defined(_MSC_VER)
     22 #define BLAKE2_PACKED(x) __pragma(pack(push, 1)) x __pragma(pack(pop))
     23 #else
     24 #define BLAKE2_PACKED(x) x __attribute__((packed))
     25 #endif
     26 
     27 #if defined(__cplusplus)
     28 extern "C" {
     29 #endif
     30 
     31   enum blake2s_constant
     32   {
     33     BLAKE2S_BLOCKBYTES = 64,
     34     BLAKE2S_OUTBYTES   = 32,
     35     BLAKE2S_KEYBYTES   = 32,
     36     BLAKE2S_SALTBYTES  = 8,
     37     BLAKE2S_PERSONALBYTES = 8
     38   };
     39 
     40   enum blake2b_constant
     41   {
     42     BLAKE2B_BLOCKBYTES = 128,
     43     BLAKE2B_OUTBYTES   = 64,
     44     BLAKE2B_KEYBYTES   = 64,
     45     BLAKE2B_SALTBYTES  = 16,
     46     BLAKE2B_PERSONALBYTES = 16
     47   };
     48 
     49   typedef struct blake2s_state__
     50   {
     51     uint32_t h[8];
     52     uint32_t t[2];
     53     uint32_t f[2];
     54     uint8_t  buf[BLAKE2S_BLOCKBYTES];
     55     size_t   buflen;
     56     size_t   outlen;
     57     uint8_t  last_node;
     58   } blake2s_state;
     59 
     60   typedef struct blake2b_state__
     61   {
     62     uint64_t h[8];
     63     uint64_t t[2];
     64     uint64_t f[2];
     65     uint8_t  buf[BLAKE2B_BLOCKBYTES];
     66     size_t   buflen;
     67     size_t   outlen;
     68     uint8_t  last_node;
     69   } blake2b_state;
     70 
     71   typedef struct blake2sp_state__
     72   {
     73     blake2s_state S[8][1];
     74     blake2s_state R[1];
     75     uint8_t       buf[8 * BLAKE2S_BLOCKBYTES];
     76     size_t        buflen;
     77     size_t        outlen;
     78   } blake2sp_state;
     79 
     80   typedef struct blake2bp_state__
     81   {
     82     blake2b_state S[4][1];
     83     blake2b_state R[1];
     84     uint8_t       buf[4 * BLAKE2B_BLOCKBYTES];
     85     size_t        buflen;
     86     size_t        outlen;
     87   } blake2bp_state;
     88 
     89 
     90   BLAKE2_PACKED(struct blake2s_param__
     91   {
     92     uint8_t  digest_length; /* 1 */
     93     uint8_t  key_length;    /* 2 */
     94     uint8_t  fanout;        /* 3 */
     95     uint8_t  depth;         /* 4 */
     96     uint32_t leaf_length;   /* 8 */
     97     uint32_t node_offset;  /* 12 */
     98     uint16_t xof_length;    /* 14 */
     99     uint8_t  node_depth;    /* 15 */
    100     uint8_t  inner_length;  /* 16 */
    101     /* uint8_t  reserved[0]; */
    102     uint8_t  salt[BLAKE2S_SALTBYTES]; /* 24 */
    103     uint8_t  personal[BLAKE2S_PERSONALBYTES];  /* 32 */
    104   });
    105 
    106   typedef struct blake2s_param__ blake2s_param;
    107 
    108   BLAKE2_PACKED(struct blake2b_param__
    109   {
    110     uint8_t  digest_length; /* 1 */
    111     uint8_t  key_length;    /* 2 */
    112     uint8_t  fanout;        /* 3 */
    113     uint8_t  depth;         /* 4 */
    114     uint32_t leaf_length;   /* 8 */
    115     uint32_t node_offset;   /* 12 */
    116     uint32_t xof_length;    /* 16 */
    117     uint8_t  node_depth;    /* 17 */
    118     uint8_t  inner_length;  /* 18 */
    119     uint8_t  reserved[14];  /* 32 */
    120     uint8_t  salt[BLAKE2B_SALTBYTES]; /* 48 */
    121     uint8_t  personal[BLAKE2B_PERSONALBYTES];  /* 64 */
    122   });
    123 
    124   typedef struct blake2b_param__ blake2b_param;
    125 
    126   typedef struct blake2xs_state__
    127   {
    128     blake2s_state S[1];
    129     blake2s_param P[1];
    130   } blake2xs_state;
    131 
    132   typedef struct blake2xb_state__
    133   {
    134     blake2b_state S[1];
    135     blake2b_param P[1];
    136   } blake2xb_state;
    137 
    138   /* Padded structs result in a compile-time error */
    139   enum {
    140     BLAKE2_DUMMY_1 = 1/(sizeof(blake2s_param) == BLAKE2S_OUTBYTES),
    141     BLAKE2_DUMMY_2 = 1/(sizeof(blake2b_param) == BLAKE2B_OUTBYTES)
    142   };
    143 
    144   /* Streaming API */
    145   int blake2s_init( blake2s_state *S, size_t outlen );
    146   int blake2s_init_key( blake2s_state *S, size_t outlen, const void *key, size_t keylen );
    147   int blake2s_init_param( blake2s_state *S, const blake2s_param *P );
    148   int blake2s_update( blake2s_state *S, const void *in, size_t inlen );
    149   int blake2s_final( blake2s_state *S, void *out, size_t outlen );
    150 
    151   int blake2b_init( blake2b_state *S, size_t outlen );
    152   int blake2b_init_key( blake2b_state *S, size_t outlen, const void *key, size_t keylen );
    153   int blake2b_init_param( blake2b_state *S, const blake2b_param *P );
    154   int blake2b_update( blake2b_state *S, const void *in, size_t inlen );
    155   int blake2b_final( blake2b_state *S, void *out, size_t outlen );
    156 
    157   int blake2sp_init( blake2sp_state *S, size_t outlen );
    158   int blake2sp_init_key( blake2sp_state *S, size_t outlen, const void *key, size_t keylen );
    159   int blake2sp_update( blake2sp_state *S, const void *in, size_t inlen );
    160   int blake2sp_final( blake2sp_state *S, void *out, size_t outlen );
    161 
    162   int blake2bp_init( blake2bp_state *S, size_t outlen );
    163   int blake2bp_init_key( blake2bp_state *S, size_t outlen, const void *key, size_t keylen );
    164   int blake2bp_update( blake2bp_state *S, const void *in, size_t inlen );
    165   int blake2bp_final( blake2bp_state *S, void *out, size_t outlen );
    166 
    167   /* Variable output length API */
    168   int blake2xs_init( blake2xs_state *S, const size_t outlen );
    169   int blake2xs_init_key( blake2xs_state *S, const size_t outlen, const void *key, size_t keylen );
    170   int blake2xs_update( blake2xs_state *S, const void *in, size_t inlen );
    171   int blake2xs_final(blake2xs_state *S, void *out, size_t outlen);
    172 
    173   int blake2xb_init( blake2xb_state *S, const size_t outlen );
    174   int blake2xb_init_key( blake2xb_state *S, const size_t outlen, const void *key, size_t keylen );
    175   int blake2xb_update( blake2xb_state *S, const void *in, size_t inlen );
    176   int blake2xb_final(blake2xb_state *S, void *out, size_t outlen);
    177 
    178   /* Simple API */
    179   int blake2s( void *out, size_t outlen, const void *in, size_t inlen, const void *key, size_t keylen );
    180   int blake2b( void *out, size_t outlen, const void *in, size_t inlen, const void *key, size_t keylen );
    181 
    182   int blake2sp( void *out, size_t outlen, const void *in, size_t inlen, const void *key, size_t keylen );
    183   int blake2bp( void *out, size_t outlen, const void *in, size_t inlen, const void *key, size_t keylen );
    184 
    185   int blake2xs( void *out, size_t outlen, const void *in, size_t inlen, const void *key, size_t keylen );
    186   int blake2xb( void *out, size_t outlen, const void *in, size_t inlen, const void *key, size_t keylen );
    187 
    188   /* This is simply an alias for blake2b */
    189   int blake2( void *out, size_t outlen, const void *in, size_t inlen, const void *key, size_t keylen );
    190 
    191 #if defined(__cplusplus)
    192 }
    193 #endif
    194 
    195 #endif