Openssl - Initialization vector cannot be used?

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#1

I am encrypting something in my server (using php). 

The encryption is done with aes-256-cbc as method, a password and  an initialization vector , which is generated by my php script. 

The problem is there is no option as far as I can see in the opennssl decrypt function, for using an initialization vector… 

Is it not possible?

#2

If it’s not documented, then we likely do not support it.  We would probably need you to file a feature request at http://feedback.coronalabs.com 

and get it voted up so we can try to work it into our engineering team’s schedule.

Rob

#3

Hi, awkaw.  It’s undocumented, but it’s there.  Here’s a snippet from a project that uses encryption to talk to web services - just add an iv parameter…

local key = "xxx" local \_cipher = ssl.get\_cipher('aes-256-cbc') function cipher.encrypt(data)   -- generate random iv   local iv = ""   for i = 1, 16 do     iv = iv .. string.char(math.random(0, 255))   end   return mime.b64(iv .. \_cipher:encrypt(data, key, iv)) end

:ph34r:

#4

Thank you. I need to decrypt, not encrypt.

#5

I also decrypt …

cipher:decrypt(data, key, iv)

… just add the iv parameter

#6

If it’s not documented, then we likely do not support it.  We would probably need you to file a feature request at http://feedback.coronalabs.com 

and get it voted up so we can try to work it into our engineering team’s schedule.

Rob

#7

Hi, awkaw.  It’s undocumented, but it’s there.  Here’s a snippet from a project that uses encryption to talk to web services - just add an iv parameter…

local key = "xxx" local \_cipher = ssl.get\_cipher('aes-256-cbc') function cipher.encrypt(data)   -- generate random iv   local iv = ""   for i = 1, 16 do     iv = iv .. string.char(math.random(0, 255))   end   return mime.b64(iv .. \_cipher:encrypt(data, key, iv)) end

:ph34r:

#8

Thank you. I need to decrypt, not encrypt.

#9

I also decrypt …

cipher:decrypt(data, key, iv)

… just add the iv parameter