amazon simpledb - Computing an HMAC-SHA signature -

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i'm writing module amazon's simpledb. require rest requests signed using hmac-sha algorithm. (details here.)

i'm told there function computer signature, can't find in documentation. function called, , arguments like?

edited: following should work:

pre {   message = "four score , 7 years ago";   key = "abe lincoln";   signature = math:hmac_sha256_base64(message, key); } notify("signature is", signature);

the function math:hmac_sha256_base64(<datastring>,<keystring>)


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