dropbearconvert: keyimport.c: fix BER encoding of secp521r1 keys (#69) keysizes >= 128 octets will be encoded with a 3 byte header which must be accounted by the optional-header Reproduce: master:~/build/dropbear$ ./dropbearkey -t ecdsa -s 521 -f K Generating 521 bit ecdsa key, this may take a while... master:~/build/dropbear$ ./dropbearconvert d o K L Key is a ecdsa-sha2-nistp521 key Wrote key to 'L' master:~/build/dropbear$ openssl ec < L read EC key unable to load Key 139769806448384:error:0D07209B:asn1 encoding routines:ASN1_get_object:too long:crypto/asn1/asn1_lib.c:91:

#!/usr/bin/perl

# we want to filter every between START_INS and END_INS out and then insert crap from another file (this is fun)

$dst = shift;
$ins = shift;

open(SRC,"<$dst");
open(INS,"<$ins");
open(TMP,">tmp.delme");

$l = 0;
while (<SRC>) {
   if ($_ =~ /START_INS/) {
      print TMP $_;
      $l = 1;
      while (<INS>) {
         print TMP $_;
      }
      close INS;
   } elsif ($_ =~ /END_INS/) {
      print TMP $_;
      $l = 0;
   } elsif ($l == 0) {
      print TMP $_;
   }
}

close TMP;
close SRC;