Verify FIPS mode in golang boringssl - go

Question

how to verify if fips mode is enabled for binary in golang dev boring crypto branch ?
I dont see an easy way apart from internal golang tests

Answer 1

From this file:
https://go.googlesource.com/go/+/dev.boringcrypto/src/crypto/tls/fipsonly/fipsonly.go
// Package fipsonly restricts all TLS configuration to FIPS-approved settings.
//
// The effect is triggered by importing the package anywhere in a program, as in:
//
// import _ "crypto/tls/fipsonly"
//
// This package only exists in the dev.boringcrypto branch of Go.
By including that import statement in your program, it will only compile if you're using the dev.boringcrypto branch.
Here's a test main.go:
package main
import (
"fmt"
_ "crypto/tls/fipsonly"
)
func main() {
fmt.Println("Hello FIPS")
}
Using the dev.boringcrypto branch of Go:
$ go version
go version go1.12.9b4 linux/amd64
$ go run main.go
Hello FIPS
Using the normal release of Go:
$ go version
go version go1.12.9 darwin/amd64
$ go run main.go
main.go:4:2: cannot find package "crypto/tls/fipsonly" in any of:
/Users/ray/.gimme/versions/go1.12.9.darwin.amd64/src/crypto/tls/fipsonly (from $GOROOT)
/Users/ray/go/src/crypto/tls/fipsonly (from $GOPATH)