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.


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