Crypto Component of the IC, and related crates

This directory contains the Crypto Component of the IC, and various smaller crates that offer selected crypto functionality. The following table describes the contents of the subdirectories, and the available crates, where ^[Wasm] indicates that the corresponding crate can be compiled to WebAssembly (Wasm).

Subdirectory	Crate(s)	Description / Notes
The main Crypto Component
src/..	ic-crypto	Crypto Component used by a replica. It contains SecretKeyStore, which manages and protects the secret keys owned by a node.
benches/..	-	benchmarks of the Crypto Component.
tests/..	-	various tests of the Crypto Component.
Miscellaneous public crates
node_key_validation/..	ic-crypto-node-key-validation[Wasm]	validation utils for public keys of a node
sha/..	ic-crypto-sha[Wasm]	hashing algorithms, incl. SHA256 and SHA224
tls_interfaces/..	ic-crypto-tls-interfaces	interfaces of TLS functionality (used by both ic-crypto and ic-crypto-tls)
tree_hash/..	ic-crypto-tree-hash[Wasm]	computation of hash trees and witnesses
utils/..	ic-crypto-utils-basic-sig[Wasm], ic-crypto-utils-threshold-sig[Wasm]	utils for basic signatures resp. threshold signatures
test_utils/..	ic-crypto-test_utils	miscellaneous utils for testing
Structures/crates for internal use only
internal/..	(many crates)	the actual implementation of the functionalities offered via the public crates from other subdirectories (crates from this directory should not be used directly outside of /crypto/..)