19 lines
697 B
Common Lisp
19 lines
697 B
Common Lisp
(in-package :whatsxmpp)
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(defun octets-to-lowercase-hex (buf)
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"Formats BUF, a vector of octets, as a lowercase hex string and returns it."
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(declare (type (vector (unsigned-byte 8)) buf))
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(format nil "~(~{~2,'0X~}~)" (coerce buf 'list)))
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(defun sha1-octets (buf)
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"Returns the SHA1 of BUF, a vector of octets, in lowercase hex."
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(octets-to-lowercase-hex (ironclad:digest-sequence :sha1 buf)))
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(defun sha1-hex (str)
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"Returns the SHA1 of STR, a string, in lowercase hex."
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(sha1-octets (babel:string-to-octets str)))
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(defun child-elements (node)
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"Returns the child elements (excluding text nodes) of the CXML DOM node NODE."
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(remove-if-not #'dom:element-p (dom:child-nodes node)))
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