diff --git a/src/utils/crypto.py b/src/utils/crypto.py
new file mode 100644
index 000000000..1c5a427fd
--- /dev/null
+++ b/src/utils/crypto.py
@@ -0,0 +1,27 @@
+import hashlib
+import hmac
+import base64
+
+def sha256(message: str) -> str:
+    """
+    Returns the SHA-256 hash of the given message.
+    """
+    return hashlib.sha256(message.encode()).hexdigest()
+
+def hmac_sha256(message: str, key: str) -> str:
+    """
+    Returns the HMAC-SHA-256 hash of the given message and key.
+    """
+    return hmac.new(key.encode(), message.encode(), hashlib.sha256).hexdigest()
+
+def base64_encode(data: bytes) -> str:
+    """
+    Returns the base64 encoding of the given data.
+    """
+    return base64.b64encode(data).decode()
+
+def base64_decode(data: str) -> bytes:
+    """
+    Returns the base64 decoding of the given data.
+    """
+    return base64.b64decode(data.encode())