add flag to print credentials as csv

src/cli.rs

@@ -66,7 +66,7 @@ impl<T: Display + FromStr> FromStr for CommaSeparated<T> {
 
 #[derive(Debug, StructOpt)]
 pub struct Credentials {
-    /// FIDO credential ids, seperated by ',' generate using fido2luks credential
+    /// FIDO credential ids, separated by ',' generate using fido2luks credential
     #[structopt(name = "credential-id", env = "FIDO2LUKS_CREDENTIAL_ID")]
     pub ids: CommaSeparated<HexEncoded>,
 }
@@ -292,12 +292,16 @@ pub enum Command {
     Token(TokenCommand),
 }
 
+///LUKS2 token related operations
 #[derive(Debug, StructOpt)]
 pub enum TokenCommand {
     /// List all tokens associated with the specified device
     List {
         #[structopt(env = "FIDO2LUKS_DEVICE")]
         device: PathBuf,
+        /// Dump all credentials as CSV
+        #[structopt(long = "csv")]
+        csv: bool,
     },
     /// Add credential to a keyslot
     Add {
@@ -585,7 +589,10 @@ pub fn run_cli() -> Fido2LuksResult<()> {
             _ => exit(1),
         },
         Command::Token(cmd) => match cmd {
-            TokenCommand::List { device } => {
+            TokenCommand::List {
+                device,
+                csv: dump_credentials,
+            } => {
                 let mut dev = LuksDevice::load(device)?;
                 let mut creds = Vec::new();
                 for token in dev.tokens()? {
@@ -593,8 +600,14 @@ pub fn run_cli() -> Fido2LuksResult<()> {
                     for cred in token.credential.iter() {
                         if !creds.contains(cred) {
                             creds.push(cred.clone());
+                            if *dump_credentials {
+                                print!("{}{}", if creds.len() == 1 { "" } else { "," }, cred);
                             }
                         }
+                    }
+                    if *dump_credentials {
+                        continue;
+                    }
                     println!(
                         "{}:\n\tSlots: {}\n\tCredentials: {}",
                         id,
@@ -615,6 +628,9 @@ pub fn run_cli() -> Fido2LuksResult<()> {
                             .join(",")
                     );
                 }
+                if *dump_credentials {
+                    println!();
+                }
                 Ok(())
             }
             TokenCommand::Add {