Module modes 

Generic block-cipher modes of operation.

Implemented in this layer:

• SP 800-38A confidentiality modes: ECB, CBC, CFB (full-block), CFB8, OFB, CTR
• SP 800-38B authentication mode: CMAC
• SP 800-38C authenticated mode: CCM
• SP 800-38D authenticated mode: GCM / GMAC
• SP 800-38E storage mode: XTS (128-bit block ciphers only)
• RFC 3394 / SP 800-38F key wrap mode: AES Key Wrap (no padding)
• EAX authenticated mode
• OCB3 authenticated mode (RFC 7253)
• AES-GCM-SIV misuse-resistant mode (RFC 8452)
• RFC 5297 misuse-resistant mode: SIV
• RFC 8439 AEAD: ChaCha20-Poly1305

These adapters are generic over any BlockCipher in the crate, so the same wrapper works with AES, DES, Camellia, PRESENT, and the other block primitives exposed here.

The point of this layer is to separate primitive choice from mode choice: one block cipher implementation can be dropped into several standardized operating modes without duplicating the mode logic in every cipher module.

Re-exports

pub use chacha20_poly1305::ChaCha20Poly1305;

pub use eax::Eax;

pub use gcm_siv::Aes128GcmSiv;

pub use gcm_siv::Aes256GcmSiv;

pub use ocb::Ocb;

pub use poly1305::Poly1305;

pub use siv::Siv;

Modules

chacha20_poly1305

ChaCha20-Poly1305 AEAD (RFC 8439).

eax

EAX authenticated encryption mode.

gcm_siv

AES-GCM-SIV (RFC 8452).

ocb

OCB authenticated encryption (RFC 7253, OCB3).

poly1305

Poly1305 one-time authenticator (RFC 8439 / RFC 7539 profile).

siv

Synthetic IV (SIV) authenticated encryption (RFC 5297).

Structs

AesKeyWrap

AES Key Wrap (RFC 3394) over 64-bit semiblocks with the default IV.

Cbc

Cipher Block Chaining (CBC) mode.

Ccm

Counter with CBC-MAC (CCM) with compile-time detached tag length.

Cfb

Cipher Feedback (CFB) mode with a segment size equal to the full block.

Cfb8

Cipher Feedback (CFB) mode with an 8-bit segment size (CFB8).

Cmac

Cipher-based Message Authentication Code (CMAC).

Ctr

Counter (CTR) mode with a big-endian incrementing counter block.

Ecb

Electronic Codebook (ECB) mode.

Gcm

Galois/Counter Mode (GCM) with a full 128-bit authentication tag.

GcmVt

Variable-time Galois/Counter Mode (GCM) reference path.

Gmac

Galois Message Authentication Code (GMAC).

GmacVt

Variable-time Galois Message Authentication Code (GMAC) reference path.

Ofb

Output Feedback (OFB) mode.

Xts

XEX-based Tweaked CodeBook mode with ciphertext Stealing (XTS).