fix(k8s): handle Kubernetes kubeconfig content correctly (#5967)

Co-authored-by: Sergio Garcia <hello@mistercloudsec.com>

prowler/providers/kubernetes/kubernetes_provider.py

@@ -1,4 +1,5 @@
 import os
+from typing import Union
 
 from colorama import Fore, Style
 from kubernetes.client.exceptions import ApiException
@@ -74,14 +75,14 @@ class KubernetesProvider(Provider):
         fixer_config: dict = {},
         mutelist_path: str = None,
         mutelist_content: dict = {},
-        kubeconfig_content: dict = None,
+        kubeconfig_content: Union[dict, str] = None,
     ):
         """
         Initializes the KubernetesProvider instance.
 
         Args:
             kubeconfig_file (str): Path to the kubeconfig file.
-            kubeconfig_content (dict): Content of the kubeconfig file.
+            kubeconfig_content (str or dict): Content of the kubeconfig file.
             context (str): Context name.
             namespace (list): List of namespaces.
             config_content (dict): Audit configuration.
@@ -224,7 +225,7 @@ class KubernetesProvider(Provider):
     @staticmethod
     def setup_session(
         kubeconfig_file: str = None,
-        kubeconfig_content: dict = None,
+        kubeconfig_content: Union[dict, str] = None,
         context: str = None,
     ) -> KubernetesSession:
         """
@@ -232,7 +233,7 @@ class KubernetesProvider(Provider):
 
         Args:
             kubeconfig_file (str): Path to the kubeconfig file.
-            kubeconfig_content (dict): Content of the kubeconfig file.
+            kubeconfig_content (str or dict): Content of the kubeconfig file.
             context (str): Context name.
 
         Returns:
@@ -243,14 +244,20 @@ class KubernetesProvider(Provider):
             KubernetesInvalidProviderIdError: If the provider ID is invalid.
             KubernetesSetUpSessionError: If an error occurs while setting up the session.
         """
-        logger.info(f"Using kubeconfig file: {kubeconfig_file}")
         try:
             if kubeconfig_content:
-                config.load_kube_config_from_dict(
-                    safe_load(kubeconfig_content), context=context
-                )
-
+                logger.info("Using kubeconfig content...")
+                config_data = safe_load(kubeconfig_content)
+                config.load_kube_config_from_dict(config_data, context=context)
+                if context:
+                    contexts = config_data.get("contexts", [])
+                    for context_item in contexts:
+                        if context_item["name"] == context:
+                            context = context_item
+                else:
+                    context = config_data.get("contexts", [])[0]
             else:
+                logger.info(f"Using kubeconfig file: {kubeconfig_file}...")
                 kubeconfig_file = (
                     kubeconfig_file if kubeconfig_file else "~/.kube/config"
                 )
@@ -273,17 +280,19 @@ class KubernetesProvider(Provider):
                     return KubernetesSession(
                         api_client=client.ApiClient(), context=context
                     )
-            if context:
-                contexts = config.list_kube_config_contexts(
-                    config_file=kubeconfig_file
-                )[0]
-                for context_item in contexts:
-                    if context_item["name"] == context:
-                        context = context_item
-            else:
-                context = config.list_kube_config_contexts(config_file=kubeconfig_file)[
-                    1
-                ]
+                if context:
+                    contexts = config.list_kube_config_contexts(
+                        config_file=kubeconfig_file
+                    )[0]
+                    for context_item in contexts:
+                        if context_item["name"] == context:
+                            context = context_item
+                else:
+                    # If no context is provided, use the active context in the kubeconfig file
+                    # The first element is the list of contexts, the second is the active context
+                    context = config.list_kube_config_contexts(
+                        config_file=kubeconfig_file
+                    )[1]
             return KubernetesSession(api_client=client.ApiClient(), context=context)
 
         except parser.ParserError as parser_error:
@@ -318,7 +327,7 @@ class KubernetesProvider(Provider):
     @staticmethod
     def test_connection(
         kubeconfig_file: str = "~/.kube/config",
-        kubeconfig_content: dict = None,
+        kubeconfig_content: Union[dict, str] = None,
         namespace: str = None,
         provider_id: str = None,
         raise_on_exception: bool = True,
@@ -328,7 +337,7 @@ class KubernetesProvider(Provider):
 
         Args:
             kubeconfig_file (str): Path to the kubeconfig file.
-            kubeconfig_content (dict): Content of the kubeconfig file.
+            kubeconfig_content (str or dict): Content of the kubeconfig file.
             namespace (str): Namespace name.
             provider_id (str): Provider ID to use, in this case, the Kubernetes context.
             raise_on_exception (bool): Whether to raise an exception on error.
@@ -352,7 +361,7 @@ class KubernetesProvider(Provider):
                 ... )
             - Using the kubeconfig content:
                 >>> connection = KubernetesProvider.test_connection(
-                ...     kubeconfig_content={"kubecofig": "content"},
+                ...     kubeconfig_content="kubeconfig content",
                 ...     namespace="default",
                 ...     provider_id="my-context",
                 ...     raise_on_exception=True,