Generate Derived Key from Shared Secret (ECDH-ES)

[roshit-omanakuttan]

Hi, Great library and I have been able to seamlessly generate the Keys. How would I now be able to generate a Derived Key as mentioned here: https://tools.ietf.org/html/rfc7518#section-4.6

Thanks

[ElyasNaranjeeSani]

Hi, I do need this part too. Do you have any plan to add KDF too? @ricmoo BTW, @roshit-omanakuttan : do you have any alternative for this?

[roshit-omanakuttan]

@EliasNaranjeeSani, I Unfortunately had to pause that project and hence this remained pending. However, now I am back on this and am yet to get a solution. Any luck at your end?

[ElyasNaranjeeSani]

@roshit-omanakuttan : I just forced to develop this part my self. Used the specifications of KDF and implemented it in Obj-C.

[roshit-omanakuttan]

@EliasNaranjeeSani, Is there a chance you would make the implementation public. If yes, please do share and I would love to use it.

[ElyasNaranjeeSani]

@roshit-omanakuttan : I would love to but unfortunately its not possible due to company policies.

[roshit-omanakuttan]

@EliasNaranjeeSani fair enough @ricmoo please help me. :)

[ricmoo]

I have no specific plans to implement this, which KDF do you need? You should be able to use the output of the ECDH shared key with any other library though...

[THCode]

你好，我的公钥是：02bf055764de0320c8221920d856d3d9b93dfc1dcbc759a560fd42553aa025ba5c 请问是通过base64加密后，设置为publickey吗，我通过base64后没有通过检测，我用的 256rl。

2018-08-30 13:53:04.371747+0800 ECDSATest[74077:7476297] These are not the droids you are looking for. 2018-08-30 13:53:04.372137+0800 ECDSATest[74077:7476297] ***** = 96 2018-08-30 13:53:04.372296+0800 ECDSATest[74077:7476297] Decompressed: (null) 2018-08-30 13:53:04.372535+0800 ECDSATest[74077:7476297] Compressed: (null)