Exception in thread "main" java.lang.RuntimeException: java.lang.NumberFormatException: For input string:

[eliezercazares]

Hello, I am in desperate need of help. Willing to pay whatever is possible for me. I have 6 backup files with tons of pictures of my cats from 5 yrs ago that I want so much to recover.

But I am getting this error, I was not asked for a password to encrypt the file by the BladeMax System Recovery device mode.

I have no idea what is going on, I know it might be encrypted but I have no idea about encryption.

Thanks for your time and your help! -eliezer

sh-3.2# java -jar target/abe.jar unpack ../../../blademax/userdata_20100101_195418_2.backup ../../../blademax/userdata.tar
Exception in thread "main" java.lang.RuntimeException: java.lang.NumberFormatException: For input string: "HW• þ>Â2-]»>–ÖzHÓÑáMg±ú"záÍcÿ֘¤8•ì"ºç·]£6‹±¬¾ž`‹%h›K*	õôJ<¨8÷¹>ª³œwd^¯*&-,Á.!ü½quØsö%‚51l§†Æ­lÞEñi©Ò¸kÇHŠËã½w­L¿ÙݬtýZ˜uh’ÞÆ_kïˆh¡Ç
       ;´_×ՕI9QG¦ë_qKÌҔMvÛ`•ýšrܹ$<Wô‡ <p©N ©E,í6b`ÕYŠ¿¶ó›S/Å㵌Zzì¬ú2¼¸S›:@GþÊõµÕ±´<„[·Â|´>‡’¢*¢H¯CÆ͆ÿ£µˆ! ÏëøHŽ¡”¤Â[­:‡l¨“§öžp#NÁ¸
ÏÂd'äX(À>#Î"Ì5½n遒,*RJʟQ¢ ’î.1¿zÓ«r\Šyv"
	at org.nick.abe.AndroidBackup.extractAsTar(AndroidBackup.java:233)
	at org.nick.abe.Main.main(Main.java:40)
Caused by: java.lang.NumberFormatException: For input string: "HW• þ>Â2-]»>–ÖzHÓÑáMg±ú"záÍcÿ֘¤8•ì"ºç·]£6‹±¬¾ž`‹%h›K*	õôJ<¨8÷¹>ª³œwd^¯*&-,Á.!ü½quØsö%‚51l§†Æ­lÞEñi©Ò¸kÇHŠËã½w­L¿ÙݬtýZ˜uh’ÞÆ_kïˆh¡Ç
                                       ;´_×ՕI9QG¦ë_qKÌҔMvÛ`•ýšrܹ$<Wô‡ <p©N ©E,í6b`ÕYŠ¿¶ó›S/Å㵌Zzì¬ú2¼¸S›:@GþÊõµÕ±´<„[·Â|´>‡’¢*¢H¯CÆ͆ÿ£µˆ! ÏëøHŽ¡”¤Â[­:‡l¨“§öžp#NÁ¸
ÏÂd'äX(À>#Î"Ì5½n遒,*RJʟQ¢ ’î.1¿zÓ«r\Šyv"
	at java.base/java.lang.NumberFormatException.forInputString(NumberFormatException.java:67)
	at java.base/java.lang.Integer.parseInt(Integer.java:660)
	at java.base/java.lang.Integer.parseInt(Integer.java:778)
	at org.nick.abe.AndroidBackup.extractAsTar(AndroidBackup.java:71)
	... 1 more

[eliezercazares]

First 25 lines of ZTE brand backup sample file:

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[nelenkov]

This seems to be a complete different format, there is no text header, so no idea really how it works.