Mercurial > dropbear
annotate ifndef_wrapper.sh @ 1715:3974f087d9c0
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> |
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date | Mon, 15 Jun 2020 18:22:18 +0500 |
parents | 0196f4f83fee |
children |
rev | line source |
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1295
750ec4ec4cbe
Convert #ifdef to #if, other build changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
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1 #!/bin/sh |
750ec4ec4cbe
Convert #ifdef to #if, other build changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
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2 |
750ec4ec4cbe
Convert #ifdef to #if, other build changes
Matt Johnston <matt@ucc.asn.au>
parents:
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3 # Wrap all "#define X Y" with a #ifndef X...#endif" |
750ec4ec4cbe
Convert #ifdef to #if, other build changes
Matt Johnston <matt@ucc.asn.au>
parents:
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4 |
1611
0196f4f83fee
avoid extended regex features to avoid caring about sed -r vs -E
Matt Johnston <matt@ucc.asn.au>
parents:
1521
diff
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5 sed 's/^\( *#define \([^ ][^ ]*\) .*\)/#ifndef \2\ |
1295
750ec4ec4cbe
Convert #ifdef to #if, other build changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
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6 \1\ |
750ec4ec4cbe
Convert #ifdef to #if, other build changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
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7 #endif/' |