how to use crc32.checksum() and md5.digest() in nodejs

[jason.桂林]

hashlib for node seems only generate string hash but not digest, fix me if I am wrong. How can I generate md5 digest or crc32 digest, which is faster?

--
Best regards,

Jason Green
桂林

[Isaac Schlueter]

Stream your data through the crypto module.

var Hash = require("crypto").Hash
, h = new Hash("md5")
, fs = require("fs")
, reader = fs.createReadStream("/etc/passwd")
reader.on("data", function (c) { h.update(c) })
reader.on("end", function () { console.log(h.digest("hex")) })

It'd be nice if the crypto Hash lib supported a similar surface to the
other stream APIs.

--i

> --
> You received this message because you are subscribed to the Google Groups
> "nodejs" group.
> To post to this group, send email to nod...@googlegroups.com.
> To unsubscribe from this group, send email to
> nodejs+un...@googlegroups.com.
> For more options, visit this group at
> http://groups.google.com/group/nodejs?hl=en.
>

[jason.桂林]

This mthod is native c++ code or javascript code ?

[Fedor Indutny]

It's openssl bindings that are native for node.js

2010/12/21 jason.桂林 <gui...@gmail.com>

[jason.桂林]

hash.digest() returns a string object ,  how to getBytes of a string object

2010/12/21 Fedor Indutny <fe...@indutny.com>

[Isaac Schlueter]

http://nodejs.org/api/buffers.html#new_Buffer

[Chris]

CRC32 is faster.

Go here (https://gist.github.com/749655) for an implementation

-Chris

[jason.桂林]

tested, this gist will only generate number less than 65535

--

You received this message because you are subscribed to the Google Groups "nodejs" group.
To post to this group, send email to nod...@googlegroups.com.
To unsubscribe from this group, send email to nodejs+un...@googlegroups.com.
For more options, visit this group at http://groups.google.com/group/nodejs?hl=en.

[Arnout Kazemier]

I also created a crc32 hash function for node: https://github.com/3rd-Eden/node-memcached/blob/master/lib/hashring.js#L206-219

which i'm using for my memcached module. 

[jason.桂林]

looks not a fast implementation