/**
 * Header file for the Lyra2 Password Hashing Scheme (PHS).
 *
 * Author: The Lyra PHC team (http://www.lyra-kdf.net/) -- 2014.
 *
 * This software is hereby placed in the public domain.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ''AS IS'' AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
#ifndef LYRA2_H_
#define LYRA2_H_

#include <stdint.h>

typedef unsigned char byte;

struct LYRA2_ctx {
    uint64_t *wholeMatrix;
};

//Block length required so Blake2's Initialization Vector (IV) is not overwritten (THIS SHOULD NOT BE MODIFIED)
#define BLOCK_LEN_BLAKE2_SAFE_INT64 8                                   //512 bits (=64 bytes, =8 uint64_t)
#define BLOCK_LEN_BLAKE2_SAFE_BYTES (BLOCK_LEN_BLAKE2_SAFE_INT64 * 8)   //same as above, in bytes


#ifdef BLOCK_LEN_BITS
        #define BLOCK_LEN_INT64 (BLOCK_LEN_BITS/64)      //Block length: 768 bits (=96 bytes, =12 uint64_t)
        #define BLOCK_LEN_BYTES (BLOCK_LEN_BITS/8)       //Block length, in bytes
#else   //default block lenght: 768 bits
        #define BLOCK_LEN_INT64 12                       //Block length: 768 bits (=96 bytes, =12 uint64_t)
        #define BLOCK_LEN_BYTES (BLOCK_LEN_INT64 * 8)    //Block length, in bytes
#endif

#define NROWS 16384
#define NCOLS 4
#define LYRA2_MEMSIZE (BLOCK_LEN_INT64 * NCOLS * 8 * NROWS)

#define memMatrix(x)  (&ctx->wholeMatrix[x * BLOCK_LEN_INT64 * NCOLS])

#ifdef __cplusplus
extern "C" {
#endif
    int LYRA2(void *ctx2, void *K, int64_t kLen, const void *pwd, int32_t pwdlen, uint32_t tcost);
    void *LYRA2_create(void);
    void LYRA2_destroy(void *c);


    static inline void lyra2_hash(const uint8_t *input, size_t size, uint8_t *output, void *ctx)
    {
        LYRA2(ctx, output, 32, input, size, 4);
    }

    static inline void lyra2v2_hash(const uint8_t *input, size_t size, uint8_t *output, void *ctx)
    {
        LYRA2(ctx, output, 32, input, size, 1);
    }
#ifdef __cplusplus
}
#endif

#endif /* LYRA2_H_ */
