(no version information, might be only in CVS)hash_init -- Initialize an incremental hashing context
Name of selected hashing algorithm (i.e. "md5", "sha256", "haval160,4", etc..)
Optional settings for hash generation, currently supports only one option:
HASH_HMAC. When specified, the
must be specified.
When HASH_HMAC is specified for
a shared secret key to be used with the HMAC hashing method must be supplied in this