Esempi in C++ (Cpp) per sqlcipher_ltc_add_random

Esempio n. 1

File: crypto_libtomcrypt.c Progetto: HappyDanger/sqlcipher

static int sqlcipher_ltc_activate(void *ctx) {
  ltc_ctx *ltc = (ltc_ctx*)ctx;
  int random_buffer_sz = 32;
  unsigned char random_buffer[random_buffer_sz];
  
  if(ltc_init == 0) {
    if(register_prng(&fortuna_desc) != CRYPT_OK) return SQLITE_ERROR;
    if(register_cipher(&rijndael_desc) != CRYPT_OK) return SQLITE_ERROR;
    if(register_hash(&sha1_desc) != CRYPT_OK) return SQLITE_ERROR;
    ltc_init = 1;
  }
  if(fortuna_start(&(ltc->prng)) != CRYPT_OK) {
    return SQLITE_ERROR;
  }
  sqlite3_randomness(random_buffer_sz, &random_buffer);
  if(sqlcipher_ltc_add_random(ctx, random_buffer, random_buffer_sz) != SQLITE_OK) {
    return SQLITE_ERROR;
  }
  if(sqlcipher_ltc_add_random(ctx, &ltc, sizeof(ltc_ctx*)) != SQLITE_OK) {
    return SQLITE_ERROR;
  }
  if(fortuna_ready(&(ltc->prng)) != CRYPT_OK) {
    return SQLITE_ERROR;
  }
  return SQLITE_OK;
}

Esempio n. 2

File: crypto_libtomcrypt.c Progetto: SCALE-GmbH/sqlcipher

static int sqlcipher_ltc_activate(void *ctx) {
  unsigned char random_buffer[FORTUNA_MAX_SZ];
#ifndef SQLCIPHER_LTC_NO_MUTEX_RAND
  if(ltc_rand_mutex == NULL){
    ltc_rand_mutex = sqlite3_mutex_alloc(SQLITE_MUTEX_FAST);
  }
  sqlite3_mutex_enter(ltc_rand_mutex);
#endif
  sqlcipher_memset(random_buffer, 0, FORTUNA_MAX_SZ);
  if(ltc_init == 0) {
    if(register_prng(&fortuna_desc) < 0) return SQLITE_ERROR;
    if(register_cipher(&rijndael_desc) < 0) return SQLITE_ERROR;
    if(register_hash(&sha512_desc) < 0) return SQLITE_ERROR;
    if(register_hash(&sha256_desc) < 0) return SQLITE_ERROR;
    if(register_hash(&sha1_desc) < 0) return SQLITE_ERROR;
    if(fortuna_start(&prng) != CRYPT_OK) {
      return SQLITE_ERROR;
    }
    ltc_init = 1;
  }
  ltc_ref_count++;
#ifndef SQLCIPHER_TEST
  sqlite3_randomness(FORTUNA_MAX_SZ, random_buffer);
#endif
#ifndef SQLCIPHER_LTC_NO_MUTEX_RAND
  sqlite3_mutex_leave(ltc_rand_mutex);
#endif
  if(sqlcipher_ltc_add_random(ctx, random_buffer, FORTUNA_MAX_SZ) != SQLITE_OK) {
    return SQLITE_ERROR;
  }
  sqlcipher_memset(random_buffer, 0, FORTUNA_MAX_SZ);
  return SQLITE_OK;
}

Esempio n. 3

File: crypto_libtomcrypt.c Progetto: HappyDanger/sqlcipher

static int sqlcipher_ltc_kdf(void *ctx, const char *pass, int pass_sz, unsigned char* salt, int salt_sz, int workfactor, int key_sz, unsigned char *key) {
  int rc, hash_idx;
  unsigned long outlen = key_sz;
  unsigned long random_buffer_sz = 256;
  char random_buffer[random_buffer_sz];
  ltc_ctx *ltc = (ltc_ctx*)ctx;

  hash_idx = find_hash("sha1");
  if((rc = pkcs_5_alg2(pass, pass_sz, salt, salt_sz,
                       workfactor, hash_idx, key, &outlen)) != CRYPT_OK) {
    return SQLITE_ERROR;
  }
  if((rc = pkcs_5_alg2(key, key_sz, salt, salt_sz,
                       1, hash_idx, random_buffer, &random_buffer_sz)) != CRYPT_OK) {
    return SQLITE_ERROR;
  }
  sqlcipher_ltc_add_random(ctx, random_buffer, random_buffer_sz);
  return SQLITE_OK;
}