Crate kipuka_coap 

EST over CoAP (RFC 9483) transport for constrained devices.

This crate implements the CoAP transport binding for Enrollment over Secure Transport, enabling EST operations on constrained IoT devices that cannot use HTTP/TLS.

Protocol Mapping

RFC 9483 maps EST operations to CoAP as follows:

• HTTPS transport is replaced by CoAP over DTLS (“coaps”)
• EST URI paths use abbreviated names (e.g., /sen for /simpleenroll)
• HTTP Content-Type headers map to CoAP Content-Format option IDs
• Large payloads (PQC certificates can exceed 7KB) use RFC 7959 block-wise transfer

Modules

• server: CoAP message parsing, encoding, and EST-coaps URI routing
• dtls: DTLS session management abstraction for CoAP security
• block: RFC 7959 block-wise transfer for large EST payloads
• content_format: CoAP content-format IDs for EST media types (RFC 9483 §5.4)

Modules

block

CoAP block-wise transfer per RFC 7959.

content_format

CoAP content-format IDs for EST media types.

dtls

DTLS session management for EST-coaps transport security.

server

CoAP message parsing, encoding, and EST-coaps URI routing.

Enums

CoapError

Errors arising from CoAP/EST-coaps protocol handling.

Type Aliases

CoapResult

Result type for CoAP operations.