Why are the hash of crx files different using the same private key

[wyudong]

I'm packing a directory using the same private key twice, but two output files have the different hash. However, packing crx in Chrome will generate two identical crx. No matter which packing methods I choose, those crx are all working as expected but I'd like to know the reason for the different hash.

crx pack src -p key.pem -o src1.crx
crx pack src -p key.pem -o src2.crx
md5sum src1.crx src2.crx

Cheers

[thom4parisot]

Good question!

I suspect a time based metadata changes somewhere but I can be wrong.