kci: Add token-info command

Signed-off-by: Denys Fedoryshchenko <denys.f@collabora.com>

Author: nuclearcat

kernelci/cli/user.py

@@ -4,6 +4,13 @@
 #
 """User management commands"""
 
+import base64
+import json
+import datetime
+import time
+
+import click
+
 from . import Args, catch_error, echo_json, get_api, kci
 
 
@@ -22,3 +29,77 @@ def whoami(config, api, indent, secrets):
     api = get_api(config, api, secrets)
     user = api.user.whoami()
     echo_json(user, indent)
+
+
+def _b64url_decode(data: str) -> bytes:
+    """Decode base64url data with padding."""
+    padding = '=' * (-len(data) % 4)
+    return base64.urlsafe_b64decode(data + padding)
+
+
+def _decode_jwt(token: str) -> dict:
+    """Decode a JWT without verifying signature."""
+    parts = token.split('.')
+    if len(parts) != 3:
+        raise click.ClickException("Invalid JWT format; expected 3 parts")
+    try:
+        header = json.loads(_b64url_decode(parts[0]).decode('utf-8'))
+        payload = json.loads(_b64url_decode(parts[1]).decode('utf-8'))
+    except (ValueError, json.JSONDecodeError) as exc:
+        raise click.ClickException("Invalid JWT encoding") from exc
+    return {"header": header, "payload": payload}
+
+
+@kci_user.command(secrets=True, name='token-info')
+@click.option('--token', help="JWT token to decode (defaults to API token)")
+@click.option('--raw', is_flag=True, help="Print raw JSON data")
+@Args.api
+@Args.indent
+@catch_error
+def token_info(token, raw, api, indent, secrets):
+    """Decode a JWT and report expiration status"""
+    token = token or (secrets.api.token if secrets else None)
+    if not token:
+        raise click.ClickException(
+            "No token provided and no API token found; use --token or set "
+            f"kci.secrets.api.<name>.token and pass --api (current: {api})"
+        )
+
+    data = _decode_jwt(token)
+    if api:
+        data["api"] = api
+    payload = data.get("payload", {})
+    exp = payload.get("exp")
+    now = int(time.time())
+    exp_info = None
+    if isinstance(exp, (int, float)):
+        exp_int = int(exp)
+        exp_info = {
+            "exp": exp_int,
+            "now": now,
+            "expired": exp_int <= now,
+            "expires_in_seconds": max(0, exp_int - now),
+        }
+    data["expiration"] = exp_info
+
+    if raw:
+        echo_json(data, indent)
+        return
+
+    header = data.get("header") or {}
+    click.echo("Token information:")
+    if api:
+        click.echo(f"  API config: {api}")
+    click.echo(f"  Algorithm: {header.get('alg', 'unknown')}")
+    click.echo(f"  Type: {header.get('typ', 'unknown')}")
+
+    if exp_info is None:
+        click.echo("  Expiration: not present")
+        return
+
+    exp_dt = datetime.datetime.utcfromtimestamp(exp_info["exp"])
+    now_dt = datetime.datetime.utcfromtimestamp(exp_info["now"])
+    click.echo(f"  Expires (UTC): {exp_dt.isoformat()}Z")
+    click.echo(f"  Now (UTC): {now_dt.isoformat()}Z")
+    click.echo(f"  Expired: {str(exp_info['expired']).lower()}")
+    click.echo(f"  Expires in (seconds): {exp_info['expires_in_seconds']}")