feat: v1.1.8, add rsa-decrypt sub command

src/cmd_rsadecrypt.rs

@@ -0,0 +1,82 @@
+use std::collections::BTreeMap;
+
+use clap::{App, Arg, ArgMatches, SubCommand};
+use openssl::encrypt::Decrypter;
+use openssl::pkey::PKey;
+use openssl::rsa::{Padding, Rsa};
+use rust_util::util_clap::{Command, CommandError};
+
+pub struct CommandImpl;
+
+// https://docs.rs/openssl/0.10.36/openssl/encrypt/index.html
+impl Command for CommandImpl {
+    fn name(&self) -> &str { "rsa-decrypt" }
+
+    fn subcommand<'a>(&self) -> App<'a, 'a> {
+        SubCommand::with_name(self.name()).about("RSA Decrypt subcommand")
+            .arg(Arg::with_name("pri-key-in").long("pri-key-in").takes_value(true).help("Private key in"))
+            .arg(Arg::with_name("encrypted").long("encrypted").takes_value(true).help("Encrypted data"))
+            .arg(Arg::with_name("padding").long("padding").takes_value(true)
+                .possible_values(&["pkcs1", "oaep", "pss", "none"]).help("Padding"))
+            .arg(Arg::with_name("json").long("json").help("JSON output"))
+    }
+
+    fn run(&self, _arg_matches: &ArgMatches, sub_arg_matches: &ArgMatches) -> CommandError {
+        let json_output = sub_arg_matches.is_present("json");
+        if json_output { rust_util::util_msg::set_logger_std_out(false); }
+
+        let pri_key_in = opt_value_result!(sub_arg_matches.value_of("pri-key-in"), "Require private key in");
+        let pri_key_bytes = opt_result!(std::fs::read(pri_key_in), "Read file: {}, failed: {}", pri_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 mut json = BTreeMap::new();
+
+        let keypair = opt_result!(Rsa::private_key_from_pem(&pri_key_bytes), "Parse RSA failed: {}");
+        let keypair = opt_result!(PKey::from_rsa(keypair), "RSA to PKey failed: {}");
+
+        let encrypted = if let Some(encrypted) = sub_arg_matches.value_of("encrypted") {
+            opt_result!(hex::decode(encrypted), "Decode encrypted HEX failed: {}")
+        } else {
+            return simple_error!("Data is required, --data-hex or --data argument!");
+        };
+
+        let mut decrypter = opt_result!(Decrypter::new(&keypair), "Decrypter new failed: {}");
+        opt_result!(decrypter.set_rsa_padding(padding), "Set RSA padding failed: {}");
+        let buffer_len = opt_result!(decrypter.decrypt_len(&encrypted), "Decrypt len failed: {}");
+        let mut data = vec![0; buffer_len];
+        let decrypted_len = opt_result!(decrypter.decrypt(&encrypted, &mut data), "Decrypt failed: {}");
+        data.truncate(decrypted_len);
+
+        let encrypted_hex = hex::encode(&encrypted);
+        information!("Padding: {}", padding_str);
+        success!("Message HEX: {}", hex::encode(&data));
+        success!("Message: {}", String::from_utf8_lossy(&data));
+        if json_output {
+            json.insert("data", hex::encode(&data));
+            json.insert("padding", padding_str.to_string());
+            json.insert("encrypted", encrypted_hex);
+        }
+
+        if json_output {
+            println!("{}", serde_json::to_string_pretty(&json).unwrap());
+        }
+
+        Ok(None)
+    }
+}

src/main.rs

@@ -12,6 +12,7 @@ mod pgpcardutil;
 mod cmd_u2fregister;
 mod cmd_u2fsign;
 mod cmd_rsaencrypt;
+mod cmd_rsadecrypt;
 mod cmd_pgp;
 mod cmd_pgpcardadmin;
 mod cmd_pgpcardlist;
@@ -46,6 +47,7 @@ fn inner_main() -> CommandError {
         Box::new(cmd_chall::CommandImpl),
         Box::new(cmd_challconfig::CommandImpl),
         Box::new(cmd_rsaencrypt::CommandImpl),
+        Box::new(cmd_rsadecrypt::CommandImpl),
         Box::new(cmd_pgp::CommandImpl),
         Box::new(cmd_pgpcardadmin::CommandImpl),
         Box::new(cmd_pgpcardlist::CommandImpl),