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package main
import (
"fmt"
"io"
"os"
"path/filepath"
)
const (
RsaLowerLength = 2048
RsaUpperLength = 4096
TypeLabelRSA = "RSA PRIVATE KEY"
TypeLabelECDSA = "EC PRIVATE KEY"
TypeLabelCSR = "CERTIFICATE REQUEST"
TypeLabelPubKey = "PUBLIC KEY"
)
var (
EcdsaLength = []int{224, 256, 384, 521}
)
func main() {
if len(os.Args) == 1 {
crash_with_help(1, "No module selected!")
}
switch os.Args[1] {
case "create-private": create_private_key()
case "create-cert-sign": create_sign_request()
case "create-public": create_public_key()
case "help": print_modules()
case "info": info_on_file()
case "sign-request": sign_request()
case "sign-input": sign_input()
case "verify-signature": verify_signature()
default: crash_with_help(1, "Command not supported!")
}
}
// get information on file (private key, sign request, certificate, ...)
func info_on_file() {}
// sign a certificate request to create a new certificate
func sign_request() {}
// open stream for given path
func open_output_stream(path string) (io.WriteCloser, error) {
switch path {
case "STDOUT": return os.Stdout, nil
case "STDERR": return os.Stderr, nil
default: return open_stream(path, os.O_WRONLY | os.O_CREATE | os.O_TRUNC)
}
}
func open_input_stream(path string) (io.ReadCloser, error) {
switch path {
case "STDIN": return os.Stdin, nil
default: return open_stream(path, os.O_RDONLY)
}
}
func open_stream(path string, flags int) (io.ReadWriteCloser, error) {
var err error
output_stream, err := os.OpenFile(path, flags, 0600)
if err != nil {
return nil, err
}
return output_stream, nil
}
// print the module help
func print_modules() {
fmt.Printf(`Usage: %s command args
where 'command' is one of:
create-private create a new private key
create-public create a public key from a private one
create-cert-sign create a new certificate sign request
help show this help
info get info on a file
sign sign a certificate request
sign-input sign a message with a private key
verify-signature verify a signature
`, filepath.Base(os.Args[0]))
fmt.Println()
}
func crash_with_help(code int, message string) {
fmt.Fprintln(os.Stderr, message)
print_modules()
os.Exit(code)
}
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