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gpop

0.1.1

0.1.1 0.1.0

Attach DPoP proofs to your Requests

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gpop src gpop_ffi.erl

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src/gpop_ffi.erl

-module(gpop_ffi).

-export([generate_p256_keypair/0, sign_es256/2]).

-include_lib("public_key/include/public_key.hrl").

generate_p256_keypair() ->
    Key = public_key:generate_key({namedCurve, secp256r1}),
    #'ECPrivateKey'{publicKey = PublicKey} = Key,
    {Key, PublicKey}.

sign_es256(Message, Key) ->
    DerSig = public_key:sign(Message, sha256, Key),
    {'ECDSA-Sig-Value', R, S} = public_key:der_decode('ECDSA-Sig-Value', DerSig),
    RBin = <<R:256>>,
    SBin = <<S:256>>,
    <<RBin/binary, SBin/binary>>.

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