Question

I have no idea how to write a byteArray like this in CF

b = new byte[] { 0x5e, 0x31, 0x9b, 0xdb, 60, 0x5b };

Answer 1

Binary objects in ColdFusion are Byte Arrays. Here is an example:

<cfset bytes = ToBinary(ToBase64("ABCDEF"))>

<cfloop array="#bytes#" index="byte">
<cfoutput>#byte#</cfoutput><br>
</cfloop>

This outputs:

65
66
67
68
69
70

edit

I discovered something unpleasant about ColdFusion in answering this… namely, that CF apparently treats all numbers as signed, and so refuses to cast a value over 127 into a byte field. In order to get a value over 127 (such as, in your example, 0x9b/155), you have to cast it as unsigned. Unfortunately, this is not that easy to do. However, I’ve whipped up a little function which makes it easier:

<cffunction name="uint">
    <cfargument name="val">
    <cfargument name="radix" default="16">
    <cfreturn CreateObject('java', 'org.apache.axis.types.UnsignedInt').init(InputBaseN(arguments.val, arguments.radix)).byteValue()>
</cffunction>

<cfset bin = JavaCast("byte[]", 
        [
            uint('5e'), 
            uint('31'), 
            uint('9b'), 
            uint('db'), 
            uint('db'), 
            uint('60', 10), 
            uint('5b')
        ])>
<cfdump var="#ToBase64(bin, 'utf-16')#">