I'd say that your Base64 algorithm is bad.

Tom

PS: When I generate a signature for the first one, I get
"yOahq5m0YjDDjfjxHaXEsW9D+X0=" which matches the Twitter version.


On 9/22/10 5:13 PM, Randomness wrote:
> As I am testing my application, I am running into a weird problem with
> signature generation. I am using the HMAC-SHA1 algorithm to generate a
> signature key that is 40 characters long. I subsequently convert this
> to bytes and base64 encode this. Comparing this with the example on
> twitter.com I get a minor deviation, where the first signature is
> generated by Twitter and the second one by me:
> 
> 
> yOahq5m0YjDDjfjxHaXEsW9D+X0=
> yOahqz+0YjDDjfjxHaXEsW9D+X0=
> 
> Subsequent tests with a reliable testing program for signature
> generation gives a similar problem:
> 
> xeJLDda1e1EEYWZcMValATjsaD8=
> xeJLDda1e1EEYWZcMValATjsaI4=
> 
> and another one:
> 
> dA8f6BIEz0o/GEtxwJ3ZtvPeP+o=
> dA8f6BIEz0qDGEtxwJ3ZtvPeiOo=
> 
> They are so close, but still different. Does anyone have any idea what
> this is ?
> 
> 

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