adding a totp::generate_code(secret: String) method for easy librar…

…y SHA1 code generation

src/totp.rs

@@ -14,13 +14,18 @@ pub fn standard_totp(config: Config, name: &str) -> TotpResult<String> {
  .totp
  .get(name)
  .ok_or(TotpError("Can't find the specified config"))?;
+ let secret = secrets::get_secret(name, &totp_settings)?;
 
+ generate_code(secret)
+}
+
+pub fn generate_code(secret: String) -> TotpResult<String> {
  let now = SystemTime::now();
  let seconds: Duration = now
  .duration_since(SystemTime::UNIX_EPOCH)
  .expect("Can't get time since UNIX_EPOCH?");
 
- let secret = base32::decode(ALPHABET, &secrets::get_secret(name, &totp_settings)?)
+ let secret = base32::decode(ALPHABET, &secret)
  .ok_or(TotpError("Failed to decode secret from base32"))?;
 
  totp(&secret, seconds, Duration::from_secs(30), 6, Sha1::new())