feat: add parse_padding, padding_to_string

src/cmd_rsaencrypt.rs

@@ -3,7 +3,7 @@ use std::collections::BTreeMap;
 use clap::{App, Arg, ArgMatches, SubCommand};
 use openssl::encrypt::Encrypter;
 use openssl::pkey::PKey;
-use openssl::rsa::{Padding, Rsa};
+use openssl::rsa::Rsa;
 use rust_util::util_clap::{Command, CommandError};
 
 use crate::digest::sha256_bytes;
@@ -32,21 +32,8 @@ impl Command for CommandImpl {
         let pub_key_bytes = opt_result!(std::fs::read(pub_key_in), "Read file: {}, failed: {}", pub_key_in);
 
         let padding_opt = sub_arg_matches.value_of("padding");
-
-        let padding = match padding_opt {
-            Some("oaep") | Some("pkcs1_oaep") => Padding::PKCS1_OAEP,
-            Some("pss") | Some("pkcs1_pss") => Padding::PKCS1_PSS,
-            Some("none") => Padding::NONE,
-            Some("pkcs1") | None => Padding::PKCS1,
-            Some(p) => return simple_error!("Not supported padding: {}", p),
-        };
-        let padding_str = match padding {
-            Padding::NONE => "none",
-            Padding::PKCS1 => "pkcs1",
-            Padding::PKCS1_PSS => "pkcs1_pss",
-            Padding::PKCS1_OAEP => "pkcs1_oaep",
-            _ => "unknown",
-        };
+        let padding = crate::rsautil::parse_padding(padding_opt)?;
+        let padding_str = crate::rsautil::padding_to_string(padding);
 
         let mut json = BTreeMap::new();