ripplehang commented on code in PR #43601:
URL: https://github.com/apache/arrow/pull/43601#discussion_r1792675831


##########
cpp/src/arrow/filesystem/s3_test_util.cc:
##########
@@ -69,6 +76,47 @@ std::string MinioTestServer::access_key() const { return 
impl_->access_key_; }
 
 std::string MinioTestServer::secret_key() const { return impl_->secret_key_; }
 
+std::string MinioTestServer::ca_path() const {
+  return impl_->temp_dir_ca_->path().ToString();
+}
+
+Status MinioTestServer::GenerateCertificateFile() {
+  // create the dedicated folder for certificate file, rather than reuse the 
data
+  // folder, since there is test case to check whether the folder is empty.
+  ARROW_ASSIGN_OR_RAISE(impl_->temp_dir_ca_, 
TemporaryDir::Make("s3fs-test-ca-"));
+
+  ARROW_ASSIGN_OR_RAISE(auto public_crt_file,
+                        PlatformFilename::FromString(ca_path() + 
"/public.crt"));
+  ARROW_ASSIGN_OR_RAISE(auto public_cert_fd, 
FileOpenWritable(public_crt_file));
+  ARROW_RETURN_NOT_OK(FileWrite(public_cert_fd.fd(),
+                                reinterpret_cast<const uint8_t*>(kMinioCert),
+                                strlen(kMinioCert)));
+  ARROW_RETURN_NOT_OK(public_cert_fd.Close());
+
+  ARROW_ASSIGN_OR_RAISE(auto private_key_file,
+                        PlatformFilename::FromString(ca_path() + 
"/private.key"));
+  ARROW_ASSIGN_OR_RAISE(auto private_key_fd, 
FileOpenWritable(private_key_file));
+  ARROW_RETURN_NOT_OK(FileWrite(private_key_fd.fd(),
+                                reinterpret_cast<const 
uint8_t*>(kMinioPrivateKey),
+                                strlen(kMinioPrivateKey)));
+  ARROW_RETURN_NOT_OK(private_key_fd.Close());
+
+  // Set the trusted CA certificate
+#if defined(__linux__)
+  arrow::fs::FileSystemGlobalOptions global_options;
+  global_options.tls_ca_dir_path = ca_path();
+  ARROW_RETURN_NOT_OK(arrow::fs::Initialize(global_options));
+#elif defined(_WIN32)
+  // Windows does not have a standard location for CA certificates
+  auto import_cert_process = std::make_unique<util::Process>();
+  ARROW_RETURN_NOT_OK(import_cert_process->SetExecutable("certutil"));
+  import_cert_process->SetArgs(
+      {"-addstore", "-f", "ArrowTest", public_crt_file.ToString()});
+  ARROW_RETURN_NOT_OK(import_cert_process->Execute());

Review Comment:
   @pitrou I think tls_ca_file_path would also NOT work on windows,  according 
to 
https://docs.aws.amazon.com/sdk-for-cpp/v1/developer-guide/client-config.html 
caPath, caFile only work on linux. 
   but if we could expose the verify_tls setting on 
arrow::fs::FileSystemGlobalOptions or arrow::fs::S3Options as @kou  suggested, 
then we could also run the test case on windows. 



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