securetemp

Secure temporary directories and files in Go

This CLI app and library can be used to create temporary directories and files inside RAM. This is useful if you temporarily need a file to store sensitive data in.

tl;dr

# Install library
go get -u github.com/leonklingele/securetemp

# Install library + CLI app ("securetemp")
go get -u github.com/leonklingele/securetemp/...
securetemp -h

// Create a temporary file inside a RAM disk which is securetemp.DefaultSize big
tmpFile, cleanupFunc, err := securetemp.TempFile(securetemp.DefaultSize)
if err != nil {
	// TODO: Properly handle error
	log.Fatal(err)
}
// `tmpFile` is an *os.File
if _, err := tmpFile.WriteString("Hello, World!"); err != nil {
	// TODO: Properly handle error
	log.Fatal(err)
}
// Call the cleanup func as soon as you no longer need the file.
// The file is deleted and the RAM is freed again.
// The cleanup function also calls `tmpFile.Close()` for you.
cleanupFunc()

// Create a temporary directory inside a RAM disk which is 20MB big
tmpDir, cleanupFunc, err := securetemp.TempDir(20 * securetemp.SizeMB)
if err != nil {
	// TODO: Properly handle error
	log.Fatal(err)
}
// Create one / multiple file/s inside `tmpDir`
file, err := os.Create(path.Join(tmpDir, "myfile.txt"))
if err != nil {
	// TODO: Properly handle error
	log.Fatal(err)
}
defer file.Close()
// Do something with `file`
if _, err := file.WriteString("Hello, World!"); err != nil {
	// TODO: Properly handle error
	log.Fatal(err)
}
file.Close()
// Call the cleanup func as soon as you no longer need the directory.
// The directory is deleted and the RAM is freed again.
// Make sure to close every file inside `tmpDir` before.
cleanupFunc()

Idea

This project was inspired by pass