Module symmetric 

COSE symmetric encryption — the middle layer of the three-layer stack:

• Lowest: Hazmat primitive (crate::hazmat::symmetric_encryption)
• Mid: COSE framing (this module)
• High: Consumer (crate::safe, EncString)

Enums

CoseContentEncryptionAlgorithm 🔒

The content-encryption algorithms that can seal the body of a COSE message.

Constants

TEXT_PAD_BLOCK_SIZE 🔒

Traits

CoseEncryptCipher 🔒

Encrypts and decrypts the content of COSE [CoseEncrypt]/[CoseEncrypt0] messages with an Aead cipher, using the cipher’s key as the content-encryption key (CEK).

Functions

algorithm_from_header 🔒

Recovers the content-encryption algorithm declared in a message’s protected header, falling back to default_algorithm when the header omits one.

decrypt_cose 🔒

Authenticates and decrypts a multi-recipient COSE [CoseEncrypt] message, dispatching to the CoseEncryptCipher indicated by the content-encryption algorithm declared in the message’s protected header.

decrypt_cose0 🔒

Authenticates and decrypts a single-recipient COSE [CoseEncrypt0] message, dispatching to the CoseEncryptCipher indicated by the content-encryption algorithm declared in the message’s protected header.

decrypt_xchacha20_poly1305 🔒

Decrypts a COSE Encrypt0 message using a XChaCha20Poly1305 key.

encrypt_cose 🔒

Encrypts plaintext into a multi-recipient COSE [CoseEncrypt] message, dispatching to the CoseEncryptCipher selected by algorithm.

encrypt_cose0 🔒

Encrypts plaintext into a single-recipient COSE [CoseEncrypt0] message, dispatching to the CoseEncryptCipher selected by algorithm.

encrypt_xchacha20_poly1305 🔒

Encrypts a plaintext message using XChaCha20Poly1305 and returns a COSE Encrypt0 message.

ensure_algorithm_matches 🔒

Validates that, if the protected header declares a content-encryption algorithm, it matches C’s.

should_pad_content 🔒