Erlang calculating HMAC-SHA1 example? -

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any examples or libraries caculate hmac-sha1 in erlang?

i tried crypto module, apparently doesn't match exactly. examples?

to expand on previous answer, here hmac module in python using sha-1 algorithm key 'hello' , message 'world':

>>> import hashlib >>> import hmac >>> hmac.hmac(key='hello', msg='world', digestmod=hashlib.sha1).hexdigest() '8a3a84bcd0d0065e97f175d370447c7d02e00973'

here's equivalent in erlang. i'd use more efficient method convert binary mac hex digest in typical code, used 1 brevity:

1> crypto:start(). ok 2> <<mac:160/integer>> = crypto:hmac(sha, <<"hello">>, <<"world">>). <<138,58,132,188,208,208,6,94,151,241,117,211,112,68,124,   125,2,224,9,115>> 3> lists:flatten(io_lib:format("~40.16.0b", [mac])).  "8a3a84bcd0d0065e97f175d370447c7d02e00973"

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