view release on metacpan or  search on metacpan

sqlite3.c  view on Meta::CPAN

  }
#endif    
  return SQLITE_OK;
}

static const char* sqlcipher_ltc_get_provider_name(void *ctx) {
  return "libtomcrypt";
}

static int sqlcipher_ltc_random(void *ctx, void *buffer, int length) {
#ifndef SQLCIPHER_LTC_NO_MUTEX_RAND
  sqlite3_mutex_enter(ltc_rand_mutex);
#endif
  fortuna_read(buffer, length, &prng);
#ifndef SQLCIPHER_LTC_NO_MUTEX_RAND
  sqlite3_mutex_leave(ltc_rand_mutex);
#endif
  return SQLITE_OK;
}

static int sqlcipher_ltc_hmac(void *ctx, unsigned char *hmac_key, int key_sz, unsigned char *in, int in_sz, unsigned char *in2, int in2_sz, unsigned char *out) {
  int rc, hash_idx;
  hmac_state hmac;
  unsigned long outlen = key_sz;

  hash_idx = find_hash("sha1");
  if((rc = hmac_init(&hmac, hash_idx, hmac_key, key_sz)) != CRYPT_OK) return SQLITE_ERROR;
  if((rc = hmac_process(&hmac, in, in_sz)) != CRYPT_OK) return SQLITE_ERROR;
  if((rc = hmac_process(&hmac, in2, in2_sz)) != CRYPT_OK) return SQLITE_ERROR;
  if((rc = hmac_done(&hmac, out, &outlen)) != CRYPT_OK) return SQLITE_ERROR;
  return SQLITE_OK;
}

static int sqlcipher_ltc_kdf(void *ctx, const unsigned 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 = sizeof(char) * 256;
  unsigned char *random_buffer = sqlcipher_malloc(random_buffer_sz);
  sqlcipher_memset(random_buffer, 0, random_buffer_sz);

  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);
  sqlcipher_free(random_buffer, random_buffer_sz);
  return SQLITE_OK;
}

static const char* sqlcipher_ltc_get_cipher(void *ctx) {
  return "rijndael";
}

static int sqlcipher_ltc_cipher(void *ctx, int mode, unsigned char *key, int key_sz, unsigned char *iv, unsigned char *in, int in_sz, unsigned char *out) {
  int rc, cipher_idx;
  symmetric_CBC cbc;

  if((cipher_idx = find_cipher(sqlcipher_ltc_get_cipher(ctx))) == -1) return SQLITE_ERROR;
  if((rc = cbc_start(cipher_idx, iv, key, key_sz, 0, &cbc)) != CRYPT_OK) return SQLITE_ERROR;
  rc = mode == 1 ? cbc_encrypt(in, out, in_sz, &cbc) : cbc_decrypt(in, out, in_sz, &cbc);
  if(rc != CRYPT_OK) return SQLITE_ERROR;
  cbc_done(&cbc);
  return SQLITE_OK;
}

static int sqlcipher_ltc_set_cipher(void *ctx, const char *cipher_name) {
  return SQLITE_OK;
}

static int sqlcipher_ltc_get_key_sz(void *ctx) {
  int cipher_idx = find_cipher(sqlcipher_ltc_get_cipher(ctx));
  return cipher_descriptor[cipher_idx].max_key_length;
}

static int sqlcipher_ltc_get_iv_sz(void *ctx) {
  int cipher_idx = find_cipher(sqlcipher_ltc_get_cipher(ctx));
  return cipher_descriptor[cipher_idx].block_length;
}

static int sqlcipher_ltc_get_block_sz(void *ctx) {
  int cipher_idx = find_cipher(sqlcipher_ltc_get_cipher(ctx));
  return cipher_descriptor[cipher_idx].block_length;
}

static int sqlcipher_ltc_get_hmac_sz(void *ctx) {
  int hash_idx = find_hash("sha1");
  return hash_descriptor[hash_idx].hashsize;
}

static int sqlcipher_ltc_ctx_copy(void *target_ctx, void *source_ctx) {
  return SQLITE_OK;
}

static int sqlcipher_ltc_ctx_cmp(void *c1, void *c2) {
  return 1;
}

static int sqlcipher_ltc_ctx_init(void **ctx) {
  sqlcipher_ltc_activate(NULL);
  return SQLITE_OK;
}

static int sqlcipher_ltc_ctx_free(void **ctx) {
  sqlcipher_ltc_deactivate(&ctx);
  return SQLITE_OK;
}

static int sqlcipher_ltc_fips_status(void *ctx) {
  return 0;
}

int sqlcipher_ltc_setup(sqlcipher_provider *p) {
  p->activate = sqlcipher_ltc_activate;
  p->deactivate = sqlcipher_ltc_deactivate;
  p->get_provider_name = sqlcipher_ltc_get_provider_name;
  p->random = sqlcipher_ltc_random;