On Fri February 6 2009, Steffen DETTMER wrote:
> Hi all, Hi Alistair!
>
> * Young, Alistair wrote on Fri, Feb 06, 2009 at 10:16 +0000:
> > Ultimately I settled on the use of a shell script to act as an
> > intermediary:
> >
> > #!/bin/bash
>
> If you can use bash you could pass the key in \xNN form for
> $'\xNN' to avoid special characters like blanks and control chars
> or binary zero issues:
> pass a kind of hey dump instead of binary.
>
> First make some "escape hex dump" with something like
>
>
> public static char[]
> getbin(byte[] buf)
> {
> char[] result = null;
> int pos = 0;
> int len = buf.length;
> {
> String result = "";
> result = new char [len * 2];
> for (int i = 0; i < len; i++) {
> byte b = buf[pos + i];
> // this is horrible slow because of many temp StringBuffers,
> // just to illustrate
> result = result + "\\x"; // we want \x in the String
> result = result + hexnib((b & 0xF0) >> 4);
> result = result + = hexnib((b & 0x0F));
> }
> }
> return result;
> }
>
> public static final char
> hexnib(int nibble)
> {
> if (nibble <= 9) return (char) ('0' + nibble);
> return (char) ('A' + nibble - 10);
> }
>
> For 'hello' you should get '\x68\x65\x6c\x6c\x6f'.
>
?? print(%q ...) ??
Mike
> Then pass this to your script as parameter like you now pass the
> file name and in your script have something like
>
> #!/bin/bash
> key_escaped="$1"
> key_raw=`eval echo $\'$key_escaped\'`
> echo openssl -option "$key_raw"
>
> which can be used like
>
> u...@host:~ $ ./x.sh '\x41\x42'
> openssl -option "AB"
>
> (This does not mean that I'd recommend to do such things! Crypto via
> shell scripts and stuff invitest potential security flaws etc.)
>
> oki,
>
> Steffen
>
>
> ----[End of message]------------------------------------------------->8=======
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