Begin implementing JavaScript Crypto API, add basic Uint8Array methods.

js/crypto.go

@@ -0,0 +1,29 @@
+package js
+
+import (
+	"crypto/sha1"
+
+	"github.com/robertkrimen/otto"
+)
+
+func cryptoSha1(call otto.FunctionCall) otto.Value {
+	argv := call.ArgumentList
+	argc := len(argv)
+	if argc != 1 {
+		return ReportError("Crypto.sha1: expected 1 argument, %d given instead.", argc)
+	}
+
+	arg := argv[0]
+	if (!arg.IsString()) {
+		return ReportError("Crypto.sha1: single argument must be a string.")
+	}
+
+	hasher := sha1.New()
+	hasher.Write([]byte(arg.String()))
+	v, err := otto.ToValue(string(hasher.Sum(nil)))
+	if err != nil {
+		return ReportError("Crypto.sha1: could not convert to string: %s", err)
+	}
+
+	return v
+}