QPQ-AG/enacl
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Implement the low-level functions for signing.

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This commit is contained in:
Jesper Louis Andersen 2014-11-25 13:48:51 +01:00
parent 30cb016078
commit c33225cb77
1 changed files with 55 additions and 0 deletions
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55
c_src/enacl_nif.c
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@ -219,6 +219,59 @@ ERL_NIF_TERM enif_crypto_sign_keypair(ErlNifEnv *env, int argc, ERL_NIF_TERM con
return enif_make_tuple3(env, enif_make_atom(env, "ok"), enif_make_binary(env, &pk), enif_make_binary(env, &sk));
}
static
ERL_NIF_TERM enif_crypto_sign(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
ErlNifBinary m, sk, sm;
unsigned long long smlen;
if (
(argc != 2) ||
(!enif_inspect_iolist_as_binary(env, argv[0], &m)) ||
(!enif_inspect_iolist_as_binary(env, argv[1], &sk))) {
return enif_make_badarg(env);
}
if (sk.size != crypto_sign_SECRETKEYBYTES) {
return enif_make_badarg(env);
}
if (!enif_alloc_binary(m.size + crypto_sign_BYTES, &sm)) {
return nacl_error_tuple(env, "alloc_failed");
}
crypto_sign(sm.data, &smlen, m.data, m.size, sk.data);
return enif_make_sub_binary(env, enif_make_binary(env, &sm), 0, smlen);
}
static
ERL_NIF_TERM enif_crypto_sign_open(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
ErlNifBinary m, sm, pk;
unsigned long long mlen;
if (
(argc != 2) ||
(!enif_inspect_iolist_as_binary(env, argv[0], &sm)) ||
(!enif_inspect_iolist_as_binary(env, argv[1], &pk))) {
return enif_make_badarg(env);
}
if (pk.size != crypto_sign_PUBLICKEYBYTES) {
return enif_make_badarg(env);
}
if (!enif_alloc_binary(sm.size, &m)) {
return nacl_error_tuple(env, "alloc_failed");
}
if (0 == crypto_sign_open(m.data, &mlen, sm.data, sm.size, pk.data)) {
return enif_make_sub_binary(env, enif_make_binary(env, &m), 0, mlen);
} else {
enif_release_binary(&m);
return nacl_error_tuple(env, "failed_verification");
}
}
/* Secret key cryptography */
static
@ -503,6 +556,8 @@ static ErlNifFunc nif_funcs[] = {
{"crypto_sign_PUBLICKEYBYTES", 0, enif_crypto_sign_PUBLICKEYBYTES},
{"crypto_sign_SECRETKEYBYTES", 0, enif_crypto_sign_SECRETKEYBYTES},
{"crypto_sign_keypair", 0, enif_crypto_sign_keypair},
{"crypto_sign", 2, enif_crypto_sign, ERL_NIF_DIRTY_JOB_CPU_BOUND},
{"crypto_sign_open", 2, enif_crypto_sign_open, ERL_NIF_DIRTY_JOB_CPU_BOUND},
{"crypto_secretbox_NONCEBYTES", 0, enif_crypto_secretbox_NONCEBYTES},
{"crypto_secretbox_ZEROBYTES", 0, enif_crypto_secretbox_ZEROBYTES},