I'm missing the functionality to get a list of registered hash functions
so one can probe whether a certain hash function is available or not.
There is now :)
array hash_algos(void)
Returns numerically indexed array of hashing engine names.
And just incase anyone missed it. The proto for hash_init() has been
extended:
resource hash_init(string algo[, int options, string key])
Options currently has one possible value: HASH_HMAC
When specified, key must be specified as well (to be used for the HMAC key).
HMAC can be used with any of the hashing algos included in ext/hash.
Examples of using HMAC with official test vectors can be found in
tests/hmac-md5.phpt
I'd rather not complicate the proto for the core hash() function with HMAC
and other options, but maybe a separate hash_hmac() and/or hash_hmac_file()
might be in order?
-Sara
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