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Disallow leading lines before the ident for server (#102) Per RFC4253 4.2 clients must be able to process other lines of data before the version string, server behavior is not defined neither with MUST/SHOULD nor with MAY. If server process up to 50 lines too - it may cause too long hanging session with invalid/evil client that consume host resources and potentially may lead to DDoS on poor embedded boxes. Let's require first line from client to be version string and fail early if it's not - matches both RFC and real OpenSSH behavior.
author Vladislav Grishenko <themiron@users.noreply.github.com>
date Mon, 15 Jun 2020 18:22:18 +0500
parents 1857c2c551ea
children
line wrap: on
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# $Id: implicit,v 1.11 2005/11/29 21:57:55 pape Exp $

.PHONY: deb-checkdir deb-checkuid

deb-checkdir:
	@test -e debian/control || sh -cx '! : wrong directory'
deb-checkuid:
	@test "`id -u`" -eq 0 || sh -cx '! : need root privileges'

%.deb: %.deb-docs %.deb-DEBIAN
	@rm -f $*.deb $*.deb-checkdir $*.deb-docs $*.deb-docs-base \
	  $*.deb-docs-docs $*.deb-docs-examples $*.deb-DEBIAN \
	  $*.deb-DEBIAN-dir $*.deb-DEBIAN-scripts $*.deb-DEBIAN-md5sums

%.udeb: %.deb-DEBIAN
	@rm -f $*.deb $*.deb-checkdir $*.deb-DEBIAN $*.deb-DEBIAN-dir \
	  $*.deb-DEBIAN-scripts $*.deb-DEBIAN-md5sums

%.deb-checkdir:
	@test -d debian/$* || sh -cx '! : directory debian/$* missing'
	@test "`id -u`" -eq 0 || sh -cx '! : need root privileges'

%.deb-docs-base:
	: implicit
	@rm -f debian/$*/usr/share/doc/$*/* || :
	@install -d -m0755 debian/$*/usr/share/doc/$*
	: debian/$*/usr/share/doc/$*/
	@sh -cx 'install -m0644 debian/copyright debian/$*/usr/share/doc/$*/'
	@sh -cx 'install -m0644 debian/changelog \
	  debian/$*/usr/share/doc/$*/changelog.Debian'
	@test ! -r changelog || \
	  sh -cx 'install -m0644 changelog debian/$*/usr/share/doc/$*/'
	@test -r debian/$*/usr/share/doc/$*/changelog || \
	  sh -cx 'mv debian/$*/usr/share/doc/$*/changelog.Debian \
	    debian/$*/usr/share/doc/$*/changelog'
	@test -s debian/$*/usr/share/doc/$*/changelog || \
	  sh -cx 'rm -f debian/$*/usr/share/doc/$*/changelog'
	@gzip -9 debian/$*/usr/share/doc/$*/changelog*
%.deb-docs-docs:
	@for i in `cat debian/$*.docs 2>/dev/null || :`; do \
	  if test -d $$i; then \
	    sh -cx "install -d -m0755 debian/$*/usr/share/doc/$*/$${i##*/}" && \
	    for j in $$i/*; do \
	      sh -cx "install -m0644 $$j \
	        debian/$*/usr/share/doc/$*/$${i##*/}/" || exit 1; \
	    done || exit 1; \
	    continue; \
	  fi; \
	  sh -cx "install -m0644 $$i debian/$*/usr/share/doc/$*/" || exit 1; \
	done
	@test ! -r debian/$*.README.Debian || \
	  sh -cx 'install -m0644 debian/$*.README.Debian \
	    debian/$*/usr/share/doc/$*/README.Debian'
	@if test -r debian/$*.NEWS.Debian; then \
	  sh -cx 'install -m0644 debian/$*.NEWS.Debian \
	    debian/$*/usr/share/doc/$*/NEWS.Debian && \
	      gzip -9 debian/$*/usr/share/doc/$*/NEWS.Debian'; \
	fi
%.deb-docs-examples:
	@rm -rf debian/$*/usr/share/doc/$*/examples
	: debian/$*/usr/share/doc/$*/examples/
	@test ! -r debian/$*.examples || \
	  install -d -m0755 debian/$*/usr/share/doc/$*/examples
	@for i in `cat debian/$*.examples 2>/dev/null || :`; do \
	  sh -cx "install -m0644 $$i debian/$*/usr/share/doc/$*/examples/" \
	    || exit 1; \
	done
%.deb-docs: %.deb-checkdir %.deb-docs-base %.deb-docs-docs %.deb-docs-examples
	: debian/$*/usr/share/doc/$*/ ok

%.deb-DEBIAN-base:
	@rm -rf debian/$*/DEBIAN
	: debian/$*/DEBIAN/
	@install -d -m0755 debian/$*/DEBIAN
	@for i in conffiles shlibs templates; do \
	  test ! -r debian/$*.$$i || \
	    sh -cx "install -m0644 debian/$*.$$i debian/$*/DEBIAN/$$i" \
	      || exit 1; \
	done
%.deb-DEBIAN-scripts:
	@for i in preinst prerm postinst postrm config; do \
	  test ! -r debian/$*.$$i || \
	    sh -cx "install -m0755 debian/$*.$$i debian/$*/DEBIAN/$$i" \
	      || exit 1; \
	done
%.deb-DEBIAN-md5sums:
	: debian/$*/DEBIAN/md5sums
	@rm -f debian/$*/DEBIAN/md5sums
	@cd debian/$* && find * -path 'DEBIAN' -prune -o \
	  -type f -exec md5sum {} >>DEBIAN/md5sums \;
%.deb-DEBIAN: %.deb-checkdir %.deb-DEBIAN-base %.deb-DEBIAN-scripts \
	  %.deb-DEBIAN-md5sums
	: debian/$*/DEBIAN/ ok