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Package entropy

import "crypto/internal/entropy"
Overview
Index

Overview ▾

Package entropy provides the passive entropy source for the FIPS 140-3 module. It is only used in FIPS mode by crypto/internal/fips140/drbg.Read.

This complies with IG 9.3.A, Additional Comment 12, which until January 1, 2026 allows new modules to meet an earlier version of Resolution 2(b): "A software module that contains an approved DRBG that receives a LOAD command (or its logical equivalent) with entropy obtained from [...] inside the physical perimeter of the operational environment of the module [...]."

Distributions that have their own SP 800-90B entropy source should replace this package with their own implementation.

Index ▾

Package files

entropy.go

func Depleted 

func Depleted(LOAD func(*[48]byte))

Depleted notifies the entropy source that the entropy in the module is "depleted" and provides the callback for the LOAD command.