Revert "crypto/internal/fips140: update frozen module version to "v1.0.0""

This reverts CL 701518. This should land just before CL 701520 to avoid
breaking the builders for long.

Fixes #75343

Change-Id: If1ae1fe933fe443ca9776888967d80875b02f41a
Reviewed-on: https://go-review.googlesource.com/c/go/+/702255
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>

src/crypto/internal/cryptotest/hash.go

@@ -20,7 +20,7 @@ type MakeHash func() hash.Hash
 // TestHash performs a set of tests on hash.Hash implementations, checking the
 // documented requirements of Write, Sum, Reset, Size, and BlockSize.
 func TestHash(t *testing.T, mh MakeHash) {
-	if boring.Enabled || fips140.Version() == "v1.0.0" {
+	if boring.Enabled || fips140.Version() == "v1.0" {
 		testhash.TestHashWithoutClone(t, testhash.MakeHash(mh))
 		return
 	}

src/crypto/internal/fips140/fips140.go

@@ -62,7 +62,7 @@ func Name() string {
 	return "Go Cryptographic Module"
 }
 
-// Version returns the formal version (such as "v1.0.0") if building against a
+// Version returns the formal version (such as "v1.0") if building against a
 // frozen module with GOFIPS140. Otherwise, it returns "latest".
 func Version() string {
 	// This return value is replaced by mkzip.go, it must not be changed or

src/crypto/internal/fips140test/fips_test.go

@@ -74,6 +74,11 @@ func TestVersion(t *testing.T) {
 			continue
 		}
 		exp := setting.Value
+		if exp == "v1.0.0" {
+			// Unfortunately we enshrined the version of the first module as
+			// v1.0 before deciding to go for full versions.
+			exp = "v1.0"
+		}
 		if v := fips140.Version(); v != exp {
 			t.Errorf("Version is %q, expected %q", v, exp)
 		}