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| Allegro CL version 9.0 Significantly revised from 8.2. 8.2 version

## hmac-sha1-init

Arguments: key &key external-format

This function, while still supported, is out of date. See the new hmac-init, hmac-string, hmac-update, and hmac-final which handle additional digest algorithms.

hmac-sha1-init prepares and returns a context for use in subsequent calls to hmac-sha1-update and hmac-sha1-final. The context is initialized according to the key argument. key can be a string or usb8 array (i.e (unsigned-byte 8) array). If key is a string, it is internally converted to an usb8 array according to the external-format keyword argument (or the default external format, if the keyword argument is not supplied).

See MD*, SHA*, HMAC, and other message digest support in miscellaneous.htm.

Copyright (c) 1998-2019, Franz Inc. Oakland, CA., USA. All rights reserved.
This page has had significant revisions compared to the 8.2 page.
Created 2019.8.20.

|  | ToC | DocOverview | CGDoc | RelNotes | FAQ | Index | PermutedIndex
| Allegro CL version 9.0 Significantly revised from 8.2. 8.2 version