Unverified Commit de0ce864 authored by Alexander Færøy's avatar Alexander Færøy
Browse files

Add Ed 25519 Utility API.

parent b544a37a
......@@ -120,6 +120,80 @@ ERL_NIF_TERM enif_crypto_curve25519_scalarmult(ErlNifEnv *env, int argc, ERL_NIF
return result;
}
/* Ed 25519 */
static
ERL_NIF_TERM enif_crypto_sign_ed25519_keypair(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
ErlNifBinary pk, sk;
if (argc != 0) {
return enif_make_badarg(env);
}
if (!enif_alloc_binary(crypto_sign_ed25519_PUBLICKEYBYTES, &pk)) {
return nacl_error_tuple(env, "alloc_failed");
}
if (!enif_alloc_binary(crypto_sign_ed25519_SECRETKEYBYTES, &sk)) {
return nacl_error_tuple(env, "alloc_failed");
}
crypto_sign_ed25519_keypair(pk.data, sk.data);
return enif_make_tuple2(env, enif_make_binary(env, &pk), enif_make_binary(env, &sk));
}
static
ERL_NIF_TERM enif_crypto_sign_ed25519_public_to_curve25519(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
ErlNifBinary curve25519_pk, ed25519_pk;
if ((argc != 1)
|| (!enif_inspect_binary(env, argv[0], &ed25519_pk))
|| (ed25519_pk.size != crypto_sign_ed25519_PUBLICKEYBYTES)) {
return enif_make_badarg(env);
}
if (!enif_alloc_binary(crypto_scalarmult_curve25519_BYTES, &curve25519_pk)) {
return nacl_error_tuple(env, "alloc_failed");
}
if (crypto_sign_ed25519_pk_to_curve25519(curve25519_pk.data, ed25519_pk.data) != 0) {
return nacl_error_tuple(env, "ed25519_public_to_curve25519_failed");
}
return enif_make_binary(env, &curve25519_pk);
}
static
ERL_NIF_TERM enif_crypto_sign_ed25519_secret_to_curve25519(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
ErlNifBinary curve25519_sk, ed25519_sk;
if ((argc != 1)
|| (!enif_inspect_binary(env, argv[0], &ed25519_sk))
|| (ed25519_sk.size != crypto_sign_ed25519_SECRETKEYBYTES)) {
return enif_make_badarg(env);
}
if (!enif_alloc_binary(crypto_scalarmult_curve25519_BYTES, &curve25519_sk)) {
return nacl_error_tuple(env, "alloc_failed");
}
if (crypto_sign_ed25519_sk_to_curve25519(curve25519_sk.data, ed25519_sk.data) != 0) {
return nacl_error_tuple(env, "ed25519_secret_to_curve25519_failed");
}
return enif_make_binary(env, &curve25519_sk);
}
static
ERL_NIF_TERM enif_crypto_sign_ed25519_PUBLICKEYBYTES(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
return enif_make_int64(env, crypto_sign_ed25519_PUBLICKEYBYTES);
}
static
ERL_NIF_TERM enif_crypto_sign_ed25519_SECRETKEYBYTES(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
return enif_make_int64(env, crypto_sign_ed25519_SECRETKEYBYTES);
}
/* Public-key cryptography */
static
ERL_NIF_TERM enif_crypto_box_NONCEBYTES(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
......@@ -849,6 +923,12 @@ static ErlNifFunc nif_funcs[] = {
{"crypto_curve25519_scalarmult", 2, enif_crypto_curve25519_scalarmult},
{"crypto_sign_ed25519_keypair", 0, enif_crypto_sign_ed25519_keypair},
{"crypto_sign_ed25519_public_to_curve25519", 1, enif_crypto_sign_ed25519_public_to_curve25519},
{"crypto_sign_ed25519_secret_to_curve25519", 1, enif_crypto_sign_ed25519_secret_to_curve25519},
{"crypto_sign_ed25519_PUBLICKEYBYTES", 0, enif_crypto_sign_ed25519_PUBLICKEYBYTES},
{"crypto_sign_ed25519_SECRETKEYBYTES", 0, enif_crypto_sign_ed25519_SECRETKEYBYTES},
{"randombytes_b", 1, enif_randombytes},
{"randombytes", 1, enif_randombytes, ERL_NIF_DIRTY_JOB_CPU_BOUND},
......
......@@ -65,6 +65,15 @@
curve25519_scalarmult/2
]).
%% Ed 25519.
-export([
crypto_sign_ed25519_keypair/0,
crypto_sign_ed25519_public_to_curve25519/1,
crypto_sign_ed25519_secret_to_curve25519/1,
crypto_sign_ed25519_public_size/0,
crypto_sign_ed25519_secret_size/0
]).
%% Low-level functions
-export([
hash/1,
......@@ -604,6 +613,40 @@ onetime_auth_key_size() -> enacl_nif:crypto_onetimeauth_KEYBYTES().
curve25519_scalarmult(Secret, BasePoint) ->
enacl_nif:crypto_curve25519_scalarmult(Secret, BasePoint).
%% Ed 25519 Crypto
%% ---------------
%% @doc crypto_sign_ed25519_keypair/0 creates a new Ed 25519 Public/Secret keypair.
%%
%% Generates and returns a new key pair for the Ed 25519 signature scheme. The return value is a
%% map in order to avoid using the public key as a secret key and vice versa.
%% @end
-spec crypto_sign_ed25519_keypair() -> #{ atom() => binary() }.
crypto_sign_ed25519_keypair() ->
{PK, SK} = enacl_nif:crypto_sign_ed25519_keypair(),
#{ public => PK, secret => SK }.
%% @doc crypto_sign_ed25519_public_to_curve25519/1 converts a given Ed 25519 public
%% key to a Curve 25519 public key.
%% @end
-spec crypto_sign_ed25519_public_to_curve25519(PublicKey :: binary()) -> binary().
crypto_sign_ed25519_public_to_curve25519(PublicKey) ->
enacl_nif:crypto_sign_ed25519_public_to_curve25519(PublicKey).
%% @doc crypto_sign_ed25519_secret_to_curve25519/1 converts a given Ed 25519 secret
%% key to a Curve 25519 secret key.
%% @end
-spec crypto_sign_ed25519_secret_to_curve25519(SecretKey :: binary()) -> binary().
crypto_sign_ed25519_secret_to_curve25519(SecretKey) ->
enacl_nif:crypto_sign_ed25519_secret_to_curve25519(SecretKey).
-spec crypto_sign_ed25519_public_size() -> pos_integer().
crypto_sign_ed25519_public_size() ->
enacl_nif:crypto_sign_ed25519_PUBLICKEYBYTES().
-spec crypto_sign_ed25519_secret_size() -> pos_integer().
crypto_sign_ed25519_secret_size() ->
enacl_nif:crypto_sign_ed25519_SECRETKEYBYTES().
%% Obtaining random bytes
%% @doc randombytes/1 produces a stream of random bytes of the given size
......
......@@ -76,6 +76,15 @@
crypto_curve25519_scalarmult/2
]).
%% Ed 25519
-export([
crypto_sign_ed25519_keypair/0,
crypto_sign_ed25519_public_to_curve25519/1,
crypto_sign_ed25519_secret_to_curve25519/1,
crypto_sign_ed25519_PUBLICKEYBYTES/0,
crypto_sign_ed25519_SECRETKEYBYTES/0
]).
%% Miscellaneous helper functions
-export([
crypto_hash/1,
......@@ -168,6 +177,12 @@ crypto_onetimeauth_verify_b(_Authenticator, _Msg, _Key) -> erlang:nif_error(nif_
crypto_curve25519_scalarmult(_Secret, _BasePoint) -> erlang:nif_error(nif_not_loaded).
crypto_sign_ed25519_keypair() -> erlang:nif_error(nif_not_loaded).
crypto_sign_ed25519_public_to_curve25519(_PublicKey) -> erlang:nif_error(nif_not_loaded).
crypto_sign_ed25519_secret_to_curve25519(_SecretKey) -> erlang:nif_error(nif_not_loaded).
crypto_sign_ed25519_PUBLICKEYBYTES() -> erlang:nif_error(nif_not_loaded).
crypto_sign_ed25519_SECRETKEYBYTES() -> erlang:nif_error(nif_not_loaded).
crypto_hash(Input) when is_binary(Input) -> erlang:nif_error(nif_not_loaded).
crypto_hash_b(Input) when is_binary(Input) -> erlang:nif_error(nif_not_loaded).
crypto_verify_16(_X, _Y) -> erlang:nif_error(nif_not_loaded).
......
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