feat: add gen random command logic

src/whispr/utils/crypto.py

@@ -0,0 +1,25 @@
+import string
+import secrets
+
+
+def generate_rand_secret(length: int, exclude_chars: str) -> str:
+    """
+    Generates a cryptographically secure random secret, excluding specified characters.
+    """
+    # Define the default character set
+    all_characters = string.ascii_letters + string.digits + string.punctuation
+    effective_characters = all_characters
+
+    if exclude_chars:
+        effective_characters = [
+            char for char in all_characters if char not in exclude_chars
+        ]
+
+        # Check if the exclusion set doesn't leave us with too few characters
+        if len(effective_characters) < length:
+            raise ValueError(
+                f"Excluding '{exclude_chars}' leaves insufficient characters to generate a {length}-character secret."
+            )
+
+    # Generate the secret using secrets.choice for cryptographically secure randomness
+    return "".join(secrets.choice(effective_characters) for _ in range(length))