crypto/rand: zero length reads shouldn't crash on Windows.
R=golang-dev, dave
CC=golang-dev
https://golang.org/cl/6496099
diff --git a/src/pkg/crypto/rand/rand_windows.go b/src/pkg/crypto/rand/rand_windows.go
index 2b2bd4b..82b39b6 100644
--- a/src/pkg/crypto/rand/rand_windows.go
+++ b/src/pkg/crypto/rand/rand_windows.go
@@ -35,6 +35,10 @@
}
}
r.mu.Unlock()
+
+ if len(b) == 0 {
+ return 0, nil
+ }
err = syscall.CryptGenRandom(r.prov, uint32(len(b)), &b[0])
if err != nil {
return 0, os.NewSyscallError("CryptGenRandom", err)
