Hi guys,
I have to implement the ECIES scheme as specified at
https://wiki.plugtests.net/ITS-CMS6/images/4/4a/1609.2-consolidated-v4-d8-clean.pdf
paragraph 5.3.5, with the KDF and encryption function specified here
I checked the 'test' folder but I didn't found any tests that help me
in this case.
However the only doubt is how I can use the API offered by openssl library.
I understand how retreive a point (and consequently to assign it to a
public key) starting from a compressed-y representation (which
://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.202.2977=rep1=pdf
Thanks,
Thulasi.
On Fri, 25 Oct 2019 at 16:50, Luca Di Mauro wrote:
Mh, maybe I didn't understand.
If I have an x-point which follows this representation
https://tools.ietf.org/id/draft-jivsov-ecc-compact-05.html (so it is
composed
Mh, maybe I didn't understand.
If I have an x-point which follows this representation
https://tools.ietf.org/id/draft-jivsov-ecc-compact-05.html (so it is
composed by 33 byte and first byte is '0x02') and I use
'EC_POINT_set_compressed_coordinates_GFp' function, it will be
considered
on the secp256k1 curve.
Quickly browsing the standard, you are likely looking for the prime256v1
curve.
BBB
On Fri, 25 Oct 2019, 9.28 Luca Di Mauro, wrote:
I think it is correct because I extracted the hexadecimal string from
a packet contained in a pcap.
This compressed point is created following the ETSI
I think it is correct because I extracted the hexadecimal string from
a packet contained in a pcap.
This compressed point is created following the ETSI TS 103 097 v1.3.1
standard for secured communications in the vehicular communication
context
_xOnly (xOnlyStr);
return 0;
}
The string 'xOnlyStr' contains a real x-only coordinate of a verification key.
Could you help me?
Thank you,
Luca Di Mauro
Luca Di Mauro ha scritto:
Thank you very much for the reply!
Yes, I have also the additional information about on which of two
Thank you very much for the reply!
Yes, I have also the additional information about on which of two
solutions I should take.
I'll check the guides you linked below.
Luca Di Mauro
Nicola Tuveri ha scritto:
Hi,
with traditional EC from the x coordinate alone you can't really do
that in C/C++ language using libssl? I searched on
google for a couple of days but i haven't found a solution.
Luca Di Mauro
