miniproto.crypto.native.aes_256_ige_decrypt

miniproto.crypto.native.aes_256_ige_decrypt

aes_256_ige_decrypt(ciphertext: bytes, key: bytes, iv: bytes) -> bytes

Decrypt block-aligned AES-256-IGE bytes.

Parameters:

• ciphertext (bytes) – Bytes whose length is a multiple of 16.
• key (bytes) – Exactly 32 bytes of AES-256 key material.
• iv (bytes) – Exactly 32 bytes in IGE chaining order.

Returns:

• bytes – Raw plaintext equal in length to ciphertext.

Raises:

• ValueError – If key/IV lengths or block alignment are invalid.

Decryption alone does not authenticate arbitrary ciphertext; the MTProto message-key verification wrapper provides the construction-specific check.