cjdns/crypto/random/Random.h

/* vim: set expandtab ts=4 sw=4: */
/*
 * You may redistribute this program and/or modify it under the terms of
 * the GNU General Public License as published by the Free Software Foundation,
 * either version 3 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
#ifndef Random_H
#define Random_H

#include "memory/Allocator.h"
#include "exception/Except.h"
#include "util/log/Log.h"
#include "crypto/random/seed/RandomSeed.h"
#include "util/Linker.h"
Linker_require("crypto/random/Random.c")

#include <stdint.h>

typedef struct Random Random_t;

void Random_bytes(Random_t* rand, uint8_t* location, uint64_t count);

/**
 * Get random Base32 text, great for password material.
 *
 * @param output the buffer to write the output to.
 * @param length the number of bytes to write.
 */
void Random_base32(struct Random* rand, uint8_t* output, uint32_t length);

void Random_addRandom(struct Random* rand, uint32_t randomNumber);


static inline void Random_longs(struct Random* rand, uint64_t* location, uint64_t count)
{
    Random_bytes(rand, (uint8_t*) location, count*8);
}

static inline void Random_ints(struct Random* rand, uint32_t* location, uint64_t count)
{
    Random_bytes(rand, (uint8_t*) location, count*4);
}

static inline int8_t Random_int8(struct Random* rand)
{
    int8_t ret;
    Random_bytes(rand, (uint8_t*)&ret, 1);
    return ret;
}
static inline uint8_t Random_uint8(struct Random* rand)
{
    uint8_t ret;
    Random_bytes(rand, (uint8_t*)&ret, 1);
    return ret;
}

static inline int16_t Random_int16(struct Random* rand)
{
    int16_t ret;
    Random_bytes(rand, (uint8_t*)&ret, 2);
    return ret;
}
static inline uint16_t Random_uint16(struct Random* rand)
{
    uint16_t ret;
    Random_bytes(rand, (uint8_t*)&ret, 2);
    return ret;
}

static inline int32_t Random_int32(struct Random* rand)
{
    int32_t ret;
    Random_bytes(rand, (uint8_t*)&ret, 4);
    return ret;
}
static inline uint32_t Random_uint32(struct Random* rand)
{
    uint32_t ret;
    Random_bytes(rand, (uint8_t*)&ret, 4);
    return ret;
}

static inline int64_t Random_int64(struct Random* rand)
{
    int64_t ret;
    Random_longs(rand, (uint64_t*)&ret, 1);
    return ret;
}
static inline uint64_t Random_uint64(struct Random* rand)
{
    uint64_t ret;
    Random_longs(rand, &ret, 1);
    return ret;
}

struct Random* Random_newWithSeed(struct Allocator* alloc,
                                  struct Log* logger,
                                  RandomSeed_t* seed,
                                  struct Except* eh);

struct Random* Random_new(struct Allocator* alloc, struct Log* logger, struct Except* eh);

#endif