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⚡️ Speed up method AES.decrypt by 2,845% #143

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⚡️ Speed up method AES.decrypt by 2,845% #143

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7 changes: 6 additions & 1 deletion skyvern/forge/sdk/encrypt/aes.py
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Original file line number Diff line number Diff line change
Expand Up @@ -16,18 +16,23 @@ def __init__(self, *, secret_key: str, salt: str | None = None, iv: str | None =
self.secret_key = hashlib.md5(secret_key.encode("utf-8")).digest()
self.salt = hashlib.md5(salt.encode("utf-8")).digest() if salt else default_salt
self.iv = hashlib.md5(iv.encode("utf-8")).digest() if iv else default_iv
self._cached_key: bytes | None = None

def method(self) -> EncryptMethod:
return EncryptMethod.AES

def _derive_key(self) -> bytes:
if self._cached_key is not None:
return self._cached_key
kdf = PBKDF2HMAC(
algorithm=hashes.SHA256(),
length=32,
salt=self.salt,
iterations=100000,
)
return kdf.derive(self.secret_key)
key = kdf.derive(self.secret_key)
self._cached_key = key
return key

async def encrypt(self, plaintext: str) -> str:
try:
Expand Down