Function generate_private_rsa_key

src/ssl/utilities.cpp:41–92

using std::vector;

Try<EVP_PKEY*> generate_private_rsa_key(int bits, unsigned long _exponent)
{
  // Allocate the in-memory structure for the private key.
  EVP_PKEY* private_key = EVP_PKEY_new();
  if (private_key == nullptr) {
    return Error("Failed to allocate key: EVP_PKEY_new");
  }

  // Allocate space for the exponent.
  BIGNUM* exponent = BN_new();
  if (exponent == nullptr) {
    EVP_PKEY_free(private_key);
    return Error("Failed to allocate exponent: BN_new");
  }

  // Assign the exponent.
  if (BN_set_word(exponent, _exponent) != 1) {
    BN_free(exponent);
    EVP_PKEY_free(private_key);
    return Error("Failed to set exponent: BN_set_word");
  }

  // Allocate the in-memory structure for the key pair.
  RSA* rsa = RSA_new();
  if (rsa == nullptr) {
    BN_free(exponent);
    EVP_PKEY_free(private_key);
    return Error("Failed to allocate RSA: RSA_new");
  }

  // Generate the RSA key pair.
  if (RSA_generate_key_ex(rsa, bits, exponent, nullptr) != 1) {
    RSA_free(rsa);
    BN_free(exponent);
    EVP_PKEY_free(private_key);
    return Error(ERR_error_string(ERR_get_error(), nullptr));
  }

  // We no longer need the exponent, so let's free it.
  BN_free(exponent);

  // Associate the RSA key with the private key. If this association
  // is successful, then the RSA key will be freed when the private
  // key is freed.
  if (EVP_PKEY_assign_RSA(private_key, rsa) != 1) {
    RSA_free(rsa);
    EVP_PKEY_free(private_key);
    return Error("Failed to assign RSA key: EVP_PKEY_assign_RSA");
  }

  return private_key;
}


Try<X509*> generate_x509(