feat: v1.10.18, add parse-ecdsa-signature

src/cmd_parseecdsasignature.rs

@@ -0,0 +1,64 @@
+use std::collections::BTreeMap;
+
+use clap::{App, Arg, ArgMatches, SubCommand};
+
+use rust_util::util_clap::{Command, CommandError};
+use rust_util::util_msg;
+
+use crate::ecdsautil::parse_ecdsa_r_and_s;
+use crate::util::try_decode;
+
+const SEPARATOR: &str = ".";
+
+pub struct CommandImpl;
+
+impl Command for CommandImpl {
+    fn name(&self) -> &str {
+        "parse-ecdsa-signature"
+    }
+
+    fn subcommand<'a>(&self) -> App<'a, 'a> {
+        SubCommand::with_name(self.name())
+            .about("Parse ECDSA signature")
+            .arg(
+                Arg::with_name("signature")
+                    .long("signature")
+                    .required(true)
+                    .takes_value(true)
+                    .help("ECDSA signature"),
+            )
+            .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 {
+            util_msg::set_logger_std_out(false);
+        }
+
+        let mut json = BTreeMap::<&'_ str, String>::new();
+
+        let signature = sub_arg_matches.value_of("signature").unwrap();
+
+        let signature_der = try_decode(signature)?;
+
+        let (r, s) = parse_ecdsa_r_and_s(&signature_der)?;
+        let mut r_and_s = r.clone();
+        r_and_s.extend_from_slice(&s);
+
+        if json_output {
+            json.insert("r", hex::encode(&r));
+            json.insert("s", hex::encode(&s));
+            json.insert("rs", hex::encode(&r_and_s));
+        } else {
+            information!("R: {}", hex::encode(&r));
+            information!("S: {}", hex::encode(&s));
+            information!("RS: {}", hex::encode(&r_and_s));
+        }
+
+        if json_output {
+            println!("{}", serde_json::to_string_pretty(&json).unwrap());
+        }
+        Ok(None)
+    }
+}