whatsxmpp/utils.lisp

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Common Lisp
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(in-package :whatsxmpp)
(defun octets-to-lowercase-hex (buf)
"Formats BUF, a vector of octets, as a lowercase hex string and returns it."
(declare (type (vector (unsigned-byte 8)) buf))
(format nil "~(~{~2,'0X~}~)" (coerce buf 'list)))
(defun sha1-octets (buf)
"Returns the SHA1 of BUF, a vector of octets, in lowercase hex."
(octets-to-lowercase-hex (ironclad:digest-sequence :sha1 buf)))
(defun sha1-hex (str)
"Returns the SHA1 of STR, a string, in lowercase hex."
(sha1-octets (babel:string-to-octets str)))