Crate layer_crypto 

Cryptographic primitives for Telegram MTProto.

Provides:

• AES-256-IGE encryption/decryption
• SHA-1 / SHA-256 hash macros
• Pollard-rho PQ factorization
• RSA padding (MTProto RSA-PAD scheme)
• AuthKey — 256-byte session key
• MTProto 2.0 message encryption / decryption
• DH nonce→key derivation

Modules

aes

AES-IGE (Infinite Garble Extension) — used by Telegram’s MTProto.

rsa

RSA padding used by Telegram’s auth key exchange.

Macros

sha1

Calculate the SHA-1 hash of one or more byte slices concatenated.

sha256

Calculate the SHA-256 hash of one or more byte slices concatenated.

Structs

AuthKey

A Telegram authorization key (256 bytes) plus pre-computed identifiers.

DequeBuffer

Growable byte buffer that supports efficient front-extension.

Enums

DecryptError

Errors from decrypt_data_v2.

Functions

decrypt_data_v2

Decrypt an MTProto 2.0 ciphertext.

encrypt_data_v2

Encrypt buffer (in-place, with prepended header) using MTProto 2.0.

factorize

Factorize pq into two prime factors (p, q) where p ≤ q.

generate_key_data_from_nonce

Derive (key, iv) from nonces for decrypting ServerDhParams.encrypted_answer.