Cargo Features

[dependencies]
fernet = { version = "0.2.2", default-features = false, features = ["fernet_danger_timestamps", "rustcrypto", "openssl"] }
default = openssl

The openssl feature is set by default whenever fernet is added without default-features = false somewhere in the dependency tree.

fernet_danger_timestamps
rustcrypto = aes, cbc, hmac, sha2, subtle

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features. These features may have been created by mistake, and this functionality may be removed in the future.

openssl default
aes rustcrypto?
cbc rustcrypto?
hmac rustcrypto?
sha2 rustcrypto?
subtle rustcrypto?