AES CBC is producing different result when encrypting the same string with the same key

[ionutale]

AES CBC is producing different result when encrypting the same string-data with the same key (password):

{ "password": "secretkey", "data": "very important data" }

run 1: U2FsdGVkX19FrkhtU0z3wgHQ7wawStvpe2onu4LbT0g7RcUejKS714z34a6lONOE

run 2: U2FsdGVkX1+fli14tUL6NurpYVRW4Cp6PUqhUOEBOrSxMYgMVRTbc5vwmYO5TwX/

run 3: U2FsdGVkX18xpwj2RIt3Qz7qtS0kNv4ZF/XRoDCRDsC1JgzNSAfGZsUNt1/bjkvM

run 4: U2FsdGVkX19fi+SOVjcO/2bR5VqjhOyvJS1B+z/xJ5DVDnnqby+6/6kEaM+n6Vmz

run 5: U2FsdGVkX18toNL/PAiClfBW3C8xa+41IiSL5b0Vi4HD2it1ExyeDGfyTyZu2yuG

is this the way it suppose to work?

[TobiasWen]

I don't have any knowledge about the implementation in crypto-js but normally each AES CBC encryption starts with a randomly generated initialization vector for the first block encryption. The result is then used as initialization vector for the next block. So in fact the ciphertexts never should be the same.

[blankey1337]

This is due to it having a salt, totally expected.

[max-lai]

Duplicate of #217