feat(cli): Implement error handling for cli encryptor parsing (#2160)

In the main loop of iggy-cli, putting invalid value for encryptor will
generate a panic from client side, however, a panic should refer to a
programmer bug rather than invalid user input.

This PR fixes it.

Author: vax-r

core/cli/src/error.rs

@@ -22,6 +22,7 @@ use thiserror::Error;
 #[derive(Error, Debug)]
 pub(crate) enum CmdToolError {
     MissingCredentials,
+    InvalidEncryptionKey,
     #[cfg(feature = "login-session")]
     MissingServerAddress,
 }
@@ -32,6 +33,9 @@ impl Display for CmdToolError {
             Self::MissingCredentials => {
                 write!(f, "Missing iggy server credentials")
             }
+            Self::InvalidEncryptionKey => {
+                write!(f, "Invalid encryption key provided")
+            }
             #[cfg(feature = "login-session")]
             Self::MissingServerAddress => {
                 write!(f, "Missing iggy server address")

core/cli/src/main.rs

@@ -27,7 +27,7 @@ use crate::args::{
     personal_access_token::PersonalAccessTokenAction, stream::StreamAction, topic::TopicAction,
 };
 use crate::credentials::IggyCredentials;
-use crate::error::IggyCmdError;
+use crate::error::{CmdToolError, IggyCmdError};
 use crate::logging::Logging;
 use args::context::ContextAction;
 use args::message::MessageAction;
@@ -370,9 +370,15 @@ async fn main() -> Result<(), IggyCmdError> {
 
     let encryptor = match iggy_args.encryption_key.is_empty() {
         true => None,
-        false => Some(Arc::new(EncryptorKind::Aes256Gcm(
-            Aes256GcmEncryptor::from_base64_key(&iggy_args.encryption_key).unwrap(),
-        ))),
+        false => {
+            let encryption_key = Aes256GcmEncryptor::from_base64_key(&iggy_args.encryption_key)
+                .map_err(|_| {
+                    <IggyCmdError as Into<anyhow::Error>>::into(IggyCmdError::CmdToolError(
+                        CmdToolError::InvalidEncryptionKey,
+                    ))
+                })?;
+            Some(Arc::new(EncryptorKind::Aes256Gcm(encryption_key)))
+        }
     };
     let client_provider_config = Arc::new(ClientProviderConfig::from_args_set_autologin(
         iggy_args.clone(),