ios - AES encryption security provider error -


ok. have experienced problem quite sometime. feeling getting close, need pointed in right direction. using cool third party library called fbencryptorae:

 nsstring * encryptedmessage = [fbencryptoraes encryptbase64string:localquery keystring:key separatelines:no];

when post encrypted query server, following error:

the aes/cbc/pkcs7padding algorithm not supported security provider have chosen

here's constraints are:

128 bit key aes/cbc/pkcs5padding, base64 coldfusion

based off of readings, pkcs5padding/ pkcs7padding same thing?? if kind , me understand:

  1. why getting error.
  2. is there sample code can view based off of constraints have? appreciate help.

pkcs5padding , pkcs7padding produce same result aes, same.

if using cbc iv required. how iv made same both encryption on ios , decryption on server? fbencryptoraes has iv capability (raw data) not (base64) defaulting "nil" (from docs). must correct. since fbencryptoraes not support need need use (raw data) api , base64 encode nsdata method base64encodeddatawithoptions:.

ensure key , iv required size, aes128 16 bytes each. wrappers expand undersize keys there no standard that, common crypto not.

hex dump input , outputs of all parameters , data on both sides ensure match.

the problem wrappers rather opaque being done , can create interoperability problems. reason use common crypto , nsdata base64 encoding/decoding know being done.


Comments

Post a Comment

Popular posts from this blog

javascript - Jquery show_hide, what to add in order to make the page scroll to the bottom of the hidden field once button is clicked -

i have button on website when clicked, reveals map. button can seen when page first loads up, when clicked, section holding map slides open , goes out of screen since page loads @ top (normal). want page scroll down bottom of div select when button pushed, if map out of screen. if page scrolled down, , clicks show map button, don't want page jump bottom of map. i tried figure out myself, no luck. seasoned jquery coders able give me guidance? many thanks! map = mapdiv.gmap3("get"); infobox = new infobox({ pixeloffset: new google.maps.size(-220, -310), closeboxurl: '', enableeventpropagation: true }); mapdiv.delegate('.infobox .close','click',function () { infobox.close(); }); jquery(".slidingdiv").hide(); jquery(".show_hide").show(); jquery('.show_hide').click(function(){ lastcenter=map.getcenter(); jquery(".slidingdiv...
Read more

python - Django-cities exits with "killed" -

i trying install django-cities on server 500mb ram. whenever run: manage.py cities the system exits saying killed. trying run: manage.py cities --import=country --force worked, guessing matter of running out of memory. to bypass, tried refer package local copy of cities' data file. still didn't work. any ideas on how can migrate data without having increase memory on server? based on suggestion comments, solved setting temporary swap file. if unfamiliar it, can follow these steps: set swap file touch /var/swap.img chmod 600 /var/swap.img set swap file size cd /var dd if=/dev/zero of=/var/swap.img bs=1024k count=1000 this create 1gb swap file. prepare disk image mkswap /var/swap.img activate swap memory swapon /var/swap.img once done, can turn off swap image: swapoff /var/swap.img more information on virtual memory , swap files can found here: https://www.digitalocean.com/community/tutorials/how-to-configure-virtual-me...
Read more

python - How to get a widget position inside it's layout in Kivy? -

i have gridlayout , added image widgets on after adding of images want draw rectangle in each image using canvas couldn't because don't know exact image widgets positions on gridlayout. code: http://paste.ofcode.org/3bdp9yhjrcrzmsztbu9hqp4 http://paste.ofcode.org/3az3gx4fxzr9dlhe2ami97c in last line of python code : rectangle(pos = (child.x - 2.4, child.y + 467), size = (70, 70)) how draw rectangle in child(my method not good^), also why gridlayout not coming in center after setting it's pos_hint = {"center_x" : .5}? if understand question right, try use such methods to_local() , to_parent() , to_widget() , to_window() . try substract position of gridlayout widgets' positions.
Read more