| // Copyright 2025 The Go Authors. All rights reserved. | |
| // Use of this source code is governed by a BSD-style | |
| // license that can be found in the LICENSE file. | |
| package fips140 | |
| import ( | |
| "internal/godebug" | |
| _ "unsafe" // for linkname | |
| ) | |
| // WithoutEnforcement disables strict FIPS 140-3 enforcement while executing f. | |
| // Calling WithoutEnforcement without strict enforcement enabled | |
| // (GODEBUG=fips140=only is not set or already inside of a call to | |
| // WithoutEnforcement) is a no-op. | |
| // | |
| // WithoutEnforcement is inherited by any goroutines spawned while executing f. | |
| // | |
| // As this disables enforcement, it should be applied carefully to tightly | |
| // scoped functions. | |
| func WithoutEnforcement(f func()) { | |
| if !Enabled() || !Enforced() { | |
| f() | |
| return | |
| } | |
| setBypass() | |
| defer unsetBypass() | |
| f() | |
| } | |
| var enabled = godebug.New("fips140").Value() == "only" | |
| // Enforced indicates if strict FIPS 140-3 enforcement is enabled. Strict | |
| // enforcement is enabled when a program is run with GODEBUG=fips140=only and | |
| // enforcement has not been disabled by a call to [WithoutEnforcement]. | |
| func Enforced() bool { | |
| return enabled && !isBypassed() | |
| } | |
| //go:linkname setBypass | |
| func setBypass() | |
| //go:linkname isBypassed | |
| func isBypassed() bool | |
| //go:linkname unsetBypass | |
| func unsetBypass() | |