2 files changed, 65 insertions(+), 77 deletions(-)

M partial_enc/simulacro.sh
D partial_enc/simulacro_2.sh

@@ 6,10 6,73 @@ pos=$1
 #binary file
 bfile=$2
 
+#password to use
+pass=$3
+
+# saving the hex info in a tmp file to manipulate the contents
 xxd $bfile > tmp
 
-test=$(head -n $pos tmp | tail -1)
-echo "$test"
+# read the desired line and save it
+line=$(head -n $pos tmp | tail -1)
+#echo "$line"
 
 rm tmp
 
+#keeping only the hex value
+tmp_hex=${line#*:}
+tmp_hex=${tmp_hex:0:40}
+
+#echo "DEBUG $tmp_hex"
+
+#encrypting
+echo "$tmp_hex" | xxd -r -p | openssl enc -e -base64 -aes-128-ctr -nopad -nosalt -k $pass > tmp 
+
+#echo "#################"
+
+#cleaning so to leave the warnings aside and keeping the content of the encryption
+
+#strings tmp | tail -1
+
+enc_hex=$(strings tmp | tail -1)
+rm tmp
+
+#echo "DEBUG $final"
+
+# encrypted to hex
+
+# string to hex
+enc_s2=$(echo $enc_hex | od -A n -t x1)
+#formatting
+# delete spaces
+enc_s2=${enc_s2//" "}
+
+# add spaces aech 4 characters
+count=0
+nstr=""
+
+for i in $(seq 1 ${#enc_s2})
+do 
+        if [ $count -eq 4 ]; then 
+                nstr="${nstr} "
+                count=0; 
+        else 
+                nstr="${nstr}${enc_s2:i-1:1}" 
+                count=$(($count + 1))
+        fi 
+done
+
+#injecting 
+
+# position where to inject
+npos=$(($pos*32))
+
+echo -e "the position where to inject the encrypted: $nstr is\n $npos"
+
+read -p"continue? Y/N " DUMMY
+#<(xxd -r -p -o 1 -seek $npos <(echo $nstr))
+dd bs=1 if=<(echo $nstr) of=$bfile seek=$npos conv=notrunc
+
+echo "Done!"
+
+
+

@@ 1,75 0,0 @@
-#!/bin/bash
-
-#position in where to change the contents
-pos=$1
-
-#binary file
-bfile=$2
-
-# saving the hex info in a tmp file to manipulate the contents
-xxd $bfile > tmp
-
-# read the desired line and save it
-line=$(head -n $pos tmp | tail -1)
-#echo "$line"
-
-rm tmp
-
-#keeping only the hex value
-tmp_hex=${line#*:}
-tmp_hex=${tmp_hex:0:40}
-
-#echo "DEBUG $tmp_hex"
-
-#encrypting
-echo "$tmp_hex" | xxd -r -p | openssl enc -e -base64 -aes-128-ctr -nopad -nosalt -k test > tmp 
-
-#echo "#################"
-
-#cleaning so to leave the warnings aside and keeping the content of the encryption
-
-#strings tmp | tail -1
-
-enc_hex=$(strings tmp | tail -1)
-rm tmp
-
-#echo "DEBUG $final"
-
-# encrypted to hex
-
-# string to hex
-enc_s2=$(echo $enc_hex | od -A n -t x1)
-#formatting
-# delete spaces
-enc_s2=${enc_s2//" "}
-
-# add spaces aech 4 characters
-count=0
-nstr=""
-
-for i in $(seq 1 ${#enc_s2})
-do 
-        if [ $count -eq 4 ]; then 
-                nstr="${nstr} "
-                count=0; 
-        else 
-                nstr="${nstr}${enc_s2:i-1:1}" 
-                count=$(($count + 1))
-        fi 
-done
-
-#injecting 
-
-# position where to inject
-npos=$(($pos*32))
-
-echo -e "the position where to inject the encrypted: $nstr is\n $npos"
-
-read -p"continue? Y/N " DUMMY
-
-dd conv=notrunc obs=1 if=<(xxd -r -p -o 1 -s +$npos <(echo $nstr)) of=$bfile
-
-echo "Done!"
-
-
-