sha256-string

Arguments: string &key start end external-format return

Using sha256-init (which creates a context), sha256-update (which updates the context with the argument string), and sha256-final (which finalizes the hash), this function computes the SHA256 hash for string.

The start and end arguments specify the portion of the string to be considered and the external-format argument specifies the external hashing of the string that will be used to update the context. start defaults to 0, end defaults to the length of string, and external-format defaults to the default external format. These arguments, along with string, are passed to sha256-update.

The format of the result, just as for sha256-final, is determined by the return keyword argument. The possible values are :integer, :usb8, and :hex. See sha256-final for information on these values and the corresponding formats of the returned value.

cl-user(4): (sha256-string "foo")  ;; default return format :integer
19970150736239713706088444570146546354146685096673408908105596072151101138862
cl-user(5): (sha256-string "foo" :return :usb8)
#(44 38 180 107 104 255 198 143 249 155 ...)
cl-user(6): 

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

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