91 lines
1.6 KiB
Go
91 lines
1.6 KiB
Go
|
package token
|
||
|
|
|
||
|
|
import (
|
||
|
|
"crypto/aes"
|
||
|
|
"crypto/cipher"
|
||
|
|
"crypto/rand"
|
||
|
|
"crypto/sha256"
|
||
|
|
"encoding/base64"
|
||
|
|
"fmt"
|
||
|
|
"io"
|
||
|
|
"syscall"
|
||
|
|
"os"
|
||
|
|
|
||
|
|
"golang.org/x/term"
|
||
|
|
)
|
||
|
|
|
||
|
|
func Must[T any](v T, err error) T {
|
||
|
|
if err != nil {
|
||
|
|
panic(err)
|
||
|
|
}
|
||
|
|
return v
|
||
|
|
}
|
||
|
|
|
||
|
|
func Token() string {
|
||
|
|
hash := sha256.Sum256(Password())
|
||
|
|
v, err := Decrypt(string(Must(io.ReadAll(Must(os.Open("encrypted"))))), hash[:])
|
||
|
|
if err != nil {
|
||
|
|
panic(err)
|
||
|
|
}
|
||
|
|
return v
|
||
|
|
}
|
||
|
|
|
||
|
|
func Password() []byte {
|
||
|
|
print("Password: ")
|
||
|
|
p, err := term.ReadPassword(int(syscall.Stdin))
|
||
|
|
if err != nil {
|
||
|
|
panic(err)
|
||
|
|
}
|
||
|
|
return p
|
||
|
|
}
|
||
|
|
|
||
|
|
func Encrypt(plainText string, key []byte) (string, error) {
|
||
|
|
block, err := aes.NewCipher(key)
|
||
|
|
if err != nil {
|
||
|
|
return "", err
|
||
|
|
}
|
||
|
|
|
||
|
|
gcm, err := cipher.NewGCM(block)
|
||
|
|
if err != nil {
|
||
|
|
return "", err
|
||
|
|
}
|
||
|
|
|
||
|
|
nonce := make([]byte, gcm.NonceSize())
|
||
|
|
if _, err := io.ReadFull(rand.Reader, nonce); err != nil {
|
||
|
|
return "", err
|
||
|
|
}
|
||
|
|
|
||
|
|
ciphertext := gcm.Seal(nonce, nonce, []byte(plainText), nil)
|
||
|
|
return base64.StdEncoding.EncodeToString(ciphertext), nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func Decrypt(cipherText string, key []byte) (string, error) {
|
||
|
|
ciphertext, err := base64.StdEncoding.DecodeString(cipherText)
|
||
|
|
if err != nil {
|
||
|
|
return "", err
|
||
|
|
}
|
||
|
|
|
||
|
|
block, err := aes.NewCipher(key)
|
||
|
|
if err != nil {
|
||
|
|
return "", err
|
||
|
|
}
|
||
|
|
|
||
|
|
gcm, err := cipher.NewGCM(block)
|
||
|
|
if err != nil {
|
||
|
|
return "", err
|
||
|
|
}
|
||
|
|
|
||
|
|
nonceSize := gcm.NonceSize()
|
||
|
|
if len(ciphertext) < nonceSize {
|
||
|
|
return "", fmt.Errorf("ciphertext too short")
|
||
|
|
}
|
||
|
|
|
||
|
|
nonce, ciphertext := ciphertext[:nonceSize], ciphertext[nonceSize:]
|
||
|
|
plainText, err := gcm.Open(nil, nonce, ciphertext, nil)
|
||
|
|
if err != nil {
|
||
|
|
return "", err
|
||
|
|
}
|
||
|
|
|
||
|
|
return string(plainText), nil
|
||
|
|
}
|