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"záÍcÿÖ�¤8�ì"ºç·]£6�±¬¾�`�%h�K*	õôJ<¨8÷¹>ª³�wd^¯*&-,Á.!ü½q�uØsö%�51l§�Æ­lÞEñi©Ò¸kÇH�Ëã½w­L¿ÙݬtýZ�uh�ÞÆ_kï�h�¡Ç
       ;´_×Õ�I9QG¦ë_qKÌÒ�MvÛ`�ý�rܹ$<Wô� <p©N ©E,í6b`ÕY�¿¶ó�S/Åãµ�Zzì¬ú2¼¸S�:@GþÊõµÕ±´<�[·Â|´>���¢*¢H¯CÆÍ�ÿ£µ�! ÏëøH��¡�¤Â[­:�l¨�§ö�p#NÁ¸
ÏÂd'äX(À>#Î"Ì5½né��,*RJÊ�Q¢ �î.1¿zÓ«r\�yv"
	at org.nick.abe.AndroidBackup.extractAsTar(AndroidBackup.java:233)
	at org.nick.abe.Main.main(Main.java:40)
Caused by: java.lang.NumberFormatException: For input string: "HW� þ>Â2-�]»>��ÖzHÓÑáMg±ú"záÍcÿÖ�¤8�ì"ºç·]£6�±¬¾�`�%h�K*	õôJ<¨8÷¹>ª³�wd^¯*&-,Á.!ü½q�uØsö%�51l§�Æ­lÞEñi©Ò¸kÇH�Ëã½w­L¿ÙݬtýZ�uh�ÞÆ_kï�h�¡Ç
                                       ;´_×Õ�I9QG¦ë_qKÌÒ�MvÛ`�ý�rܹ$<Wô� <p©N ©E,í6b`ÕY�¿¶ó�S/Åãµ�Zzì¬ú2¼¸S�:@GþÊõµÕ±´<�[·Â|´>���¢*¢H¯CÆÍ�ÿ£µ�! ÏëøH��¡�¤Â[­:�l¨�§ö�p#NÁ¸
ÏÂd'äX(À>#Î"Ì5½né��,*RJÊ�Q¢ �î.1¿zÓ«r\�yv"
	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.