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enacl/c_src/enacl_nif.c
Garry Hill 279c2c32c8
Add support for multi-part signatures
2019-11-20 12:11:21 +00:00

1919 lines
57 KiB
C
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#include "erl_nif.h"
#include <string.h>
#include <sodium.h>
#define ATOM_OK "ok"
#define ATOM_ERROR "error"
#define ATOM_TRUE "true"
#define ATOM_FALSE "false"
#define CRYPTO_GENERICHASH_STATE_RESOURCE "crypto_generichash_state"
#define CRYPTO_SIGN_STATE_RESOURCE "crypto_sign_state"
#ifdef ERL_NIF_DIRTY_JOB_CPU_BOUND
#define erl_nif_dirty_job_cpu_bound_macro(a,b,c) {a,b,c,ERL_NIF_DIRTY_JOB_CPU_BOUND}
#else
#define erl_nif_dirty_job_cpu_bound_macro(a,b,c) {a,b,c}
#endif
//{"crypto_box_keypair", 0, enif_crypto_box_keypair, ERL_NIF_DIRTY_JOB_CPU_BOUND}
/* Errors */
/* These are global variables for resource types */
static ErlNifResourceType *generichash_state_type = NULL;
static ErlNifResourceType *sign_state_type = NULL;
static
ERL_NIF_TERM nacl_error_tuple(ErlNifEnv *env, char *error_atom) {
return enif_make_tuple2(env, enif_make_atom(env, "error"), enif_make_atom(env, error_atom));
}
/* Initialization */
static
int enif_crypto_load(ErlNifEnv *env, void **priv_data, ERL_NIF_TERM load_info) {
// Create a new resource type for crypto_generichash_state
if( !(generichash_state_type = enif_open_resource_type(env, NULL, CRYPTO_GENERICHASH_STATE_RESOURCE, NULL, ERL_NIF_RT_CREATE, NULL)) ) {
return -1;
}
// Create a new resource type for crypto_sign_state
if( !(sign_state_type = enif_open_resource_type(env, NULL, CRYPTO_SIGN_STATE_RESOURCE, NULL, ERL_NIF_RT_CREATE, NULL)) ) {
return -1;
}
return sodium_init();
}
/* Low-level functions (Hashing, String Equality, ...) */
static
ERL_NIF_TERM enif_crypto_hash(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
ErlNifBinary input;
ErlNifBinary result;
if ((argc != 1) || (!enif_inspect_iolist_as_binary(env, argv[0], &input))) {
return enif_make_badarg(env);
}
if (!enif_alloc_binary(crypto_hash_BYTES, &result)) {
return nacl_error_tuple(env, "alloc_failed");
}
crypto_hash(result.data, input.data, input.size);
return enif_make_binary(env, &result);
}
static
ERL_NIF_TERM enif_crypto_verify_16(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
ErlNifBinary x,y;
if ((argc != 2) || (!enif_inspect_binary(env, argv[0], &x))
|| (!enif_inspect_binary(env, argv[1], &y))) {
return enif_make_badarg(env);
}
if (x.size != 16 || y.size != 16) {
return enif_make_badarg(env);
}
if (0 == crypto_verify_16(x.data, y.data)) {
return enif_make_atom(env, "true");
} else {
return enif_make_atom(env, "false");
}
}
static
ERL_NIF_TERM enif_crypto_verify_32(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
ErlNifBinary x,y;
if ((argc != 2) || (!enif_inspect_binary(env, argv[0], &x))
|| (!enif_inspect_binary(env, argv[1], &y))) {
return enif_make_badarg(env);
}
if (x.size != 32 || y.size != 32) {
return enif_make_badarg(env);
}
if (0 == crypto_verify_32(x.data, y.data)) {
return enif_make_atom(env, "true");
} else {
return enif_make_atom(env, "false");
}
}
/* This is very unsafe. It will not affect things that have been binary_copy()'ed
Use this for destroying key material from ram but nothing more. Be careful! */
static
ERL_NIF_TERM enif_sodium_memzero(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
ErlNifBinary x;
if ((argc != 1) || (!enif_inspect_binary(env, argv[0], &x))) {
return enif_make_badarg(env);
}
sodium_memzero(x.data,x.size);
return enif_make_atom(env, "ok");
}
/* Curve 25519 */
static
ERL_NIF_TERM enif_crypto_curve25519_scalarmult(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
ERL_NIF_TERM result;
ErlNifBinary secret, basepoint, output;
uint8_t bp[crypto_scalarmult_curve25519_BYTES];
if ((argc != 2) || (!enif_inspect_binary(env, argv[0], &secret))
|| (!enif_inspect_binary(env, argv[1], &basepoint))
|| (secret.size != crypto_scalarmult_curve25519_BYTES)
|| (basepoint.size != crypto_scalarmult_curve25519_BYTES)) {
return enif_make_badarg(env);
}
memcpy(bp, basepoint.data, crypto_scalarmult_curve25519_BYTES);
/* Clear the high-bit. Better safe than sorry. */
bp[31] &= 0x7f;
do
{
if (!enif_alloc_binary(crypto_scalarmult_curve25519_BYTES, &output)) {
result = nacl_error_tuple(env, "alloc_failed");
continue;
}
if (crypto_scalarmult_curve25519(output.data, secret.data, bp) < 0) {
result = nacl_error_tuple(env, "scalarmult_curve25519_failed");
continue;
}
result = enif_make_binary(env, &output);
} while (0);
sodium_memzero(bp, crypto_scalarmult_curve25519_BYTES);
return result;
}
static
ERL_NIF_TERM enif_crypto_curve25519_scalarmult_base(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
ERL_NIF_TERM result;
ErlNifBinary secret, output;
if ((argc != 1) || (!enif_inspect_binary(env, argv[0], &secret))
|| (secret.size != crypto_scalarmult_curve25519_BYTES)) {
return enif_make_badarg(env);
}
do
{
if (!enif_alloc_binary(crypto_scalarmult_curve25519_BYTES, &output)) {
result = nacl_error_tuple(env, "alloc_failed");
continue;
}
if (crypto_scalarmult_curve25519_base(output.data, secret.data) < 0) {
result = nacl_error_tuple(env, "scalarmult_curve25519_base_failed");
continue;
}
result = enif_make_binary(env, &output);
} while (0);
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[]) {
return enif_make_int64(env, crypto_box_NONCEBYTES);
}
static
ERL_NIF_TERM enif_crypto_box_ZEROBYTES(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
return enif_make_int64(env, crypto_box_ZEROBYTES);
}
static
ERL_NIF_TERM enif_crypto_box_BOXZEROBYTES(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
return enif_make_int64(env, crypto_box_BOXZEROBYTES);
}
static
ERL_NIF_TERM enif_crypto_box_PUBLICKEYBYTES(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
return enif_make_int64(env, crypto_box_PUBLICKEYBYTES);
}
static
ERL_NIF_TERM enif_crypto_box_SECRETKEYBYTES(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
return enif_make_int64(env, crypto_box_SECRETKEYBYTES);
}
static
ERL_NIF_TERM enif_crypto_box_BEFORENMBYTES(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
return enif_make_int64(env, crypto_box_BEFORENMBYTES);
}
static
ERL_NIF_TERM enif_crypto_box_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_box_PUBLICKEYBYTES, &pk)) {
return nacl_error_tuple(env, "alloc_failed");
}
if (!enif_alloc_binary(crypto_box_SECRETKEYBYTES, &sk)) {
return nacl_error_tuple(env, "alloc_failed");
}
crypto_box_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_box(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
ErlNifBinary padded_msg, nonce, pk, sk, result;
if (
(argc != 4) ||
(!enif_inspect_iolist_as_binary(env, argv[0], &padded_msg)) ||
(!enif_inspect_binary(env, argv[1], &nonce)) ||
(!enif_inspect_binary(env, argv[2], &pk)) ||
(!enif_inspect_binary(env, argv[3], &sk))) {
return enif_make_badarg(env);
}
if (
(nonce.size != crypto_box_NONCEBYTES) ||
(pk.size != crypto_box_PUBLICKEYBYTES) ||
(sk.size != crypto_box_SECRETKEYBYTES) ||
(padded_msg.size < crypto_box_ZEROBYTES)) {
return enif_make_badarg(env);
}
if (!enif_alloc_binary(padded_msg.size, &result)) {
return nacl_error_tuple(env, "alloc_failed");
}
if( 0 != crypto_box(result.data, padded_msg.data, padded_msg.size, nonce.data, pk.data, sk.data) ) {
return nacl_error_tuple(env, "box_error");
}
return enif_make_sub_binary(
env,
enif_make_binary(env, &result),
crypto_box_BOXZEROBYTES,
padded_msg.size - crypto_box_BOXZEROBYTES);
}
static
ERL_NIF_TERM enif_crypto_box_open(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
ErlNifBinary padded_ciphertext, nonce, pk, sk, result;
if (
(argc != 4) ||
(!enif_inspect_iolist_as_binary(env, argv[0], &padded_ciphertext)) ||
(!enif_inspect_binary(env, argv[1], &nonce)) ||
(!enif_inspect_binary(env, argv[2], &pk)) ||
(!enif_inspect_binary(env, argv[3], &sk))) {
return enif_make_badarg(env);
}
if (
(nonce.size != crypto_box_NONCEBYTES) ||
(pk.size != crypto_box_PUBLICKEYBYTES) ||
(sk.size != crypto_box_SECRETKEYBYTES) ||
(padded_ciphertext.size < crypto_box_BOXZEROBYTES)) {
return enif_make_badarg(env);
}
if (!enif_alloc_binary(padded_ciphertext.size, &result)) {
return nacl_error_tuple(env, "alloc_failed");
}
if (0 != crypto_box_open(result.data, padded_ciphertext.data, padded_ciphertext.size, nonce.data, pk.data, sk.data)) {
enif_release_binary(&result);
return nacl_error_tuple(env, "failed_verification");
}
return enif_make_sub_binary(
env,
enif_make_binary(env, &result),
crypto_box_ZEROBYTES,
padded_ciphertext.size - crypto_box_ZEROBYTES);
}
/* Precomputed crypto boxes */
static
ERL_NIF_TERM enif_crypto_box_beforenm(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
ErlNifBinary k, pk, sk;
if (
(argc != 2) ||
(!enif_inspect_binary(env, argv[0], &pk)) ||
(!enif_inspect_binary(env, argv[1], &sk)) ||
(pk.size != crypto_box_PUBLICKEYBYTES) ||
(sk.size != crypto_box_SECRETKEYBYTES)) {
return enif_make_badarg(env);
}
if (!enif_alloc_binary(crypto_box_BEFORENMBYTES, &k)) {
return nacl_error_tuple(env, "alloc_failed");
}
if( 0 != crypto_box_beforenm(k.data, pk.data, sk.data) ) {
// error
return nacl_error_tuple(env, "error_gen_shared_secret");
}
return enif_make_binary(env, &k);
}
static
ERL_NIF_TERM enif_crypto_box_afternm(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
ErlNifBinary result, m, nonce, k;
if (
(argc != 3) ||
(!enif_inspect_iolist_as_binary(env, argv[0], &m)) ||
(!enif_inspect_binary(env, argv[1], &nonce)) ||
(!enif_inspect_binary(env, argv[2], &k)) ||
(m.size < crypto_box_ZEROBYTES) ||
(nonce.size != crypto_box_NONCEBYTES) ||
(k.size != crypto_box_BEFORENMBYTES)) {
return enif_make_badarg(env);
}
if (!enif_alloc_binary(m.size, &result)) {
return nacl_error_tuple(env, "alloc_failed");
}
crypto_box_afternm(result.data, m.data, m.size, nonce.data, k.data);
return enif_make_sub_binary(
env,
enif_make_binary(env, &result),
crypto_box_BOXZEROBYTES,
m.size - crypto_box_BOXZEROBYTES);
}
static
ERL_NIF_TERM enif_crypto_box_open_afternm(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
ErlNifBinary result, m, nonce, k;
if (
(argc != 3) ||
(!enif_inspect_iolist_as_binary(env, argv[0], &m)) ||
(!enif_inspect_binary(env, argv[1], &nonce)) ||
(!enif_inspect_binary(env, argv[2], &k)) ||
(m.size < crypto_box_BOXZEROBYTES) ||
(nonce.size != crypto_box_NONCEBYTES) ||
(k.size != crypto_box_BEFORENMBYTES)) {
return enif_make_badarg(env);
}
if (!enif_alloc_binary(m.size, &result)) {
return nacl_error_tuple(env, "alloc_failed");
}
if (0 != crypto_box_open_afternm(result.data, m.data, m.size, nonce.data, k.data)) {
enif_release_binary(&result);
return nacl_error_tuple(env, "failed_verification");
}
return enif_make_sub_binary(
env,
enif_make_binary(env, &result),
crypto_box_ZEROBYTES,
m.size - crypto_box_ZEROBYTES);
}
/* Signing */
static
ERL_NIF_TERM enif_crypto_sign_PUBLICKEYBYTES(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
return enif_make_int64(env, crypto_sign_PUBLICKEYBYTES);
}
static
ERL_NIF_TERM enif_crypto_sign_SECRETKEYBYTES(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
return enif_make_int64(env, crypto_sign_SECRETKEYBYTES);
}
static
ERL_NIF_TERM enif_crypto_sign_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_PUBLICKEYBYTES, &pk)) {
return nacl_error_tuple(env, "alloc_failed");
}
if (!enif_alloc_binary(crypto_sign_SECRETKEYBYTES, &sk)) {
return nacl_error_tuple(env, "alloc_failed");
}
crypto_sign_keypair(pk.data, sk.data);
return enif_make_tuple2(env, enif_make_binary(env, &pk), enif_make_binary(env, &sk));
}
/*
int crypto_sign(unsigned char *sm, unsigned long long *smlen,
const unsigned char *m, unsigned long long mlen,
const unsigned char *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_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);
}
/*
int crypto_sign_open(unsigned char *m, unsigned long long *mlen,
const unsigned char *sm, unsigned long long smlen,
const unsigned char *pk);
*/
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_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");
}
}
/*
int crypto_sign_detached(unsigned char *sig, unsigned long long *siglen,
const unsigned char *m, unsigned long long mlen,
const unsigned char *sk);
*/
static
ERL_NIF_TERM enif_crypto_sign_detached(ErlNifEnv* env, int argc, ERL_NIF_TERM const argv[]) {
ErlNifBinary m, sk, sig;
unsigned long long siglen;
if (
(argc != 2) ||
(!enif_inspect_iolist_as_binary(env, argv[0], &m)) ||
(!enif_inspect_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(crypto_sign_BYTES, &sig)) {
return nacl_error_tuple(env, "alloc_failed");
}
crypto_sign_detached(sig.data, &siglen, m.data, m.size, sk.data);
return enif_make_binary(env, &sig);
}
/*
int crypto_sign_verify_detached(const unsigned char *sig,
const unsigned char *m,
unsigned long long mlen,
const unsigned char *pk);
*/
static
ERL_NIF_TERM enif_crypto_sign_verify_detached(ErlNifEnv* env, int argc, ERL_NIF_TERM const argv[]) {
ErlNifBinary m, sig, pk;
if (
(argc != 3) ||
(!enif_inspect_binary(env, argv[0], &sig)) ||
(!enif_inspect_iolist_as_binary(env, argv[1], &m)) ||
(!enif_inspect_binary(env, argv[2], &pk))) {
return enif_make_badarg(env);
}
if (pk.size != crypto_sign_PUBLICKEYBYTES) {
return enif_make_badarg(env);
}
if (0 == crypto_sign_verify_detached(sig.data, m.data, m.size, pk.data)) {
return enif_make_atom(env, "true");
} else {
return enif_make_atom(env, "false");
}
}
/*
int crypto_sign_init(crypto_sign_state *state)
*/
static
ERL_NIF_TERM enif_crypto_sign_init(ErlNifEnv* env, int argc, ERL_NIF_TERM const argv[]) {
if( (argc != 0) ) {
return enif_make_badarg(env);
}
void* state = enif_alloc_resource(sign_state_type, crypto_sign_statebytes());
if( !state ) {
return nacl_error_tuple(env, "alloc_failed");
}
if( 0 != crypto_sign_init(state) ) {
return nacl_error_tuple(env, "sign_init_error");
}
// Create return values
ERL_NIF_TERM e1 = enif_make_atom(env, "signstate");
ERL_NIF_TERM e2 = enif_make_resource(env, state);
// release dynamically allocated memory to erlang to mange
enif_release_resource(state);
// return a tuple
return enif_make_tuple2(env, e1, e2);
}
/*
int crypto_sign_update(crypto_sign_state *state,
const unsigned char *m,
unsigned long long mlen);
*/
static
ERL_NIF_TERM enif_crypto_sign_update(ErlNifEnv* env, int argc, ERL_NIF_TERM const argv[]) {
ErlNifBinary data;
void *state;
// Validate the arguments
if( (argc != 2) ||
(!enif_get_resource(env, argv[0], sign_state_type, (void **)&state)) ||
(!enif_inspect_binary(env, argv[1], &data)) ) {
return enif_make_badarg(env);
}
if( 0 != crypto_sign_update(state, data.data, data.size) ) {
return nacl_error_tuple(env, "sign_update_error");
}
// Generate return value
ERL_NIF_TERM e1 = enif_make_atom(env, "signstate");
ERL_NIF_TERM e2 = enif_make_resource(env, state);
// return a tuple
return enif_make_tuple2(env, e1, e2);
}
/*
int crypto_sign_final_create(crypto_sign_state *state,
unsigned char *sig,
unsigned long long *siglen_p,
const unsigned char *sk);
*/
static
ERL_NIF_TERM enif_crypto_sign_final_create(ErlNifEnv* env, int argc, ERL_NIF_TERM const argv[]) {
ErlNifBinary sk, sig;
void *state;
unsigned long long siglen;
if( (argc != 2) ||
(!enif_get_resource(env, argv[0], sign_state_type, (void **)&state)) ||
(!enif_inspect_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(crypto_sign_BYTES, &sig) ) {
return nacl_error_tuple(env, "alloc_failed");
}
if( 0 != crypto_sign_final_create(state, sig.data, &siglen, sk.data) ) {
enif_release_binary(&sig);
return nacl_error_tuple(env, "sign_error");
}
ERL_NIF_TERM ok = enif_make_atom(env, ATOM_OK);
ERL_NIF_TERM ret = enif_make_binary(env, &sig);
return enif_make_tuple2(env, ok, ret);
}
/*
int crypto_sign_final_verify(crypto_sign_state *state,
unsigned char *sig,
const unsigned char *pk);
*/
static
ERL_NIF_TERM enif_crypto_sign_final_verify(ErlNifEnv* env, int argc, ERL_NIF_TERM const argv[]) {
ErlNifBinary pk, sig;
void *state;
if( (argc != 3) ||
(!enif_get_resource(env, argv[0], sign_state_type, (void **)&state)) ||
(!enif_inspect_binary(env, argv[1], &sig)) ||
(!enif_inspect_binary(env, argv[2], &pk)) ) {
return enif_make_badarg(env);
}
if( pk.size != crypto_sign_PUBLICKEYBYTES ) {
return enif_make_badarg(env);
}
if( 0 == crypto_sign_final_verify(state, sig.data, pk.data) ) {
return enif_make_atom(env, ATOM_OK);
}
return nacl_error_tuple(env, "failed_verification");
}
/* Sealed box functions */
static
ERL_NIF_TERM enif_crypto_box_SEALBYTES(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
return enif_make_int64(env, crypto_box_SEALBYTES);
}
static
ERL_NIF_TERM enif_crypto_box_seal(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
ErlNifBinary key, msg, ciphertext;
if (
(argc != 2) ||
(!enif_inspect_iolist_as_binary(env, argv[0], &msg)) ||
(!enif_inspect_binary(env, argv[1], &key))) {
return enif_make_badarg(env);
}
if (!enif_alloc_binary(msg.size + crypto_box_SEALBYTES, &ciphertext)) {
return nacl_error_tuple(env, "alloc_failed");
}
crypto_box_seal(
ciphertext.data,
msg.data,
msg.size,
key.data);
return enif_make_binary(env, &ciphertext);
}
static
ERL_NIF_TERM enif_crypto_box_seal_open(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
ErlNifBinary pk, sk, ciphertext, msg;
if (
(argc != 3) ||
(!enif_inspect_iolist_as_binary(env, argv[0], &ciphertext)) ||
(!enif_inspect_binary(env, argv[1], &pk)) ||
(!enif_inspect_binary(env, argv[2], &sk))) {
return enif_make_badarg(env);
}
if (ciphertext.size < crypto_box_SEALBYTES) {
return enif_make_badarg(env);
}
if (!enif_alloc_binary(ciphertext.size - crypto_box_SEALBYTES, &msg)) {
return nacl_error_tuple(env, "alloc_failed");
}
if (crypto_box_seal_open(
msg.data,
ciphertext.data,
ciphertext.size,
pk.data,
sk.data) != 0) {
enif_release_binary(&msg);
return nacl_error_tuple(env, "failed_verification");
}
return enif_make_binary(env, &msg);
}
/* Secret key cryptography */
static
ERL_NIF_TERM enif_crypto_secretbox_NONCEBYTES(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
return enif_make_int64(env, crypto_secretbox_NONCEBYTES);
}
static
ERL_NIF_TERM enif_crypto_secretbox_KEYBYTES(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
return enif_make_int64(env, crypto_secretbox_KEYBYTES);
}
static
ERL_NIF_TERM enif_crypto_secretbox_ZEROBYTES(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
return enif_make_int64(env, crypto_secretbox_ZEROBYTES);
}
static
ERL_NIF_TERM enif_crypto_secretbox_BOXZEROBYTES(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
return enif_make_int64(env, crypto_secretbox_BOXZEROBYTES);
}
static
ERL_NIF_TERM enif_crypto_stream_chacha20_KEYBYTES(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
return enif_make_int64(env, crypto_stream_chacha20_KEYBYTES);
}
static
ERL_NIF_TERM enif_crypto_stream_chacha20_NONCEBYTES(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
return enif_make_int64(env, crypto_stream_chacha20_NONCEBYTES);
}
static
ERL_NIF_TERM enif_crypto_stream_KEYBYTES(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
return enif_make_int64(env, crypto_stream_KEYBYTES);
}
static
ERL_NIF_TERM enif_crypto_stream_NONCEBYTES(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
return enif_make_int64(env, crypto_stream_NONCEBYTES);
}
static
ERL_NIF_TERM enif_crypto_auth_BYTES(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
return enif_make_int64(env, crypto_auth_BYTES);
}
static
ERL_NIF_TERM enif_crypto_auth_KEYBYTES(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
return enif_make_int64(env, crypto_auth_KEYBYTES);
}
static
ERL_NIF_TERM enif_crypto_shorthash_BYTES(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
return enif_make_int64(env, crypto_shorthash_BYTES);
}
static
ERL_NIF_TERM enif_crypto_shorthash_KEYBYTES(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
return enif_make_int64(env, crypto_shorthash_KEYBYTES);
}
static
ERL_NIF_TERM enif_crypto_onetimeauth_BYTES(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
return enif_make_int64(env, crypto_onetimeauth_BYTES);
}
static
ERL_NIF_TERM enif_crypto_onetimeauth_KEYBYTES(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
return enif_make_int64(env, crypto_onetimeauth_KEYBYTES);
}
static
ERL_NIF_TERM enif_crypto_secretbox(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
ErlNifBinary key, nonce, padded_msg, padded_ciphertext;
if (
(argc != 3) ||
(!enif_inspect_iolist_as_binary(env, argv[0], &padded_msg)) ||
(!enif_inspect_binary(env, argv[1], &nonce)) ||
(!enif_inspect_binary(env, argv[2], &key))) {
return enif_make_badarg(env);
}
if (
(key.size != crypto_secretbox_KEYBYTES) ||
(nonce.size != crypto_secretbox_NONCEBYTES) ||
(padded_msg.size < crypto_secretbox_ZEROBYTES)) {
return enif_make_badarg(env);
}
if (!enif_alloc_binary(padded_msg.size, &padded_ciphertext)) {
return nacl_error_tuple(env, "alloc_failed");
}
crypto_secretbox(
padded_ciphertext.data,
padded_msg.data, padded_msg.size,
nonce.data,
key.data);
return enif_make_sub_binary(env,
enif_make_binary(env, &padded_ciphertext),
crypto_secretbox_BOXZEROBYTES,
padded_msg.size - crypto_secretbox_BOXZEROBYTES);
}
static
ERL_NIF_TERM enif_crypto_secretbox_open(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
ErlNifBinary key, nonce, padded_ciphertext, padded_msg;
if (
(argc != 3) ||
(!enif_inspect_iolist_as_binary(env, argv[0], &padded_ciphertext)) ||
(!enif_inspect_binary(env, argv[1], &nonce)) ||
(!enif_inspect_binary(env, argv[2], &key))) {
return enif_make_badarg(env);
}
if (
(key.size != crypto_secretbox_KEYBYTES) ||
(nonce.size != crypto_secretbox_NONCEBYTES) ||
(padded_ciphertext.size < crypto_secretbox_BOXZEROBYTES)) {
return enif_make_badarg(env);
}
if (!enif_alloc_binary(padded_ciphertext.size, &padded_msg)) {
return nacl_error_tuple(env, "alloc_failed");
}
if (crypto_secretbox_open(
padded_msg.data,
padded_ciphertext.data,
padded_ciphertext.size,
nonce.data,
key.data) != 0) {
enif_release_binary(&padded_msg);
return nacl_error_tuple(env, "failed_verification");
}
return enif_make_sub_binary(
env,
enif_make_binary(env, &padded_msg),
crypto_secretbox_ZEROBYTES,
padded_ciphertext.size - crypto_secretbox_ZEROBYTES);
}
static
ERL_NIF_TERM enif_crypto_stream_chacha20(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
ErlNifBinary c, n, k;
ErlNifUInt64 clen;
if (
(argc != 3) ||
(!enif_get_uint64(env, argv[0], &clen)) ||
(!enif_inspect_binary(env, argv[1], &n)) ||
(!enif_inspect_binary(env, argv[2], &k))) {
return enif_make_badarg(env);
}
if (
(k.size != crypto_stream_chacha20_KEYBYTES) ||
(n.size != crypto_stream_chacha20_NONCEBYTES)) {
return enif_make_badarg(env);
}
if (!enif_alloc_binary(clen, &c)) {
return nacl_error_tuple(env, "alloc_failed");
}
crypto_stream_chacha20(c.data, c.size, n.data, k.data);
return enif_make_binary(env, &c);
}
static
ERL_NIF_TERM enif_crypto_stream_chacha20_xor(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
ErlNifBinary c, m, n, k;
if (
(argc != 3) ||
(!enif_inspect_iolist_as_binary(env, argv[0], &m)) ||
(!enif_inspect_binary(env, argv[1], &n)) ||
(!enif_inspect_binary(env, argv[2], &k))) {
return enif_make_badarg(env);
}
if (
(k.size != crypto_stream_chacha20_KEYBYTES) ||
(n.size != crypto_stream_chacha20_NONCEBYTES)) {
return enif_make_badarg(env);
}
if (!enif_alloc_binary(m.size, &c)) {
return nacl_error_tuple(env, "alloc_failed");
}
crypto_stream_chacha20_xor(c.data, m.data, m.size, n.data, k.data);
return enif_make_binary(env, &c);
}
static
ERL_NIF_TERM enif_crypto_stream(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
ErlNifBinary c, n, k;
ErlNifUInt64 clen;
if (
(argc != 3) ||
(!enif_get_uint64(env, argv[0], &clen)) ||
(!enif_inspect_binary(env, argv[1], &n)) ||
(!enif_inspect_binary(env, argv[2], &k))) {
return enif_make_badarg(env);
}
if (
(k.size != crypto_stream_KEYBYTES) ||
(n.size != crypto_stream_NONCEBYTES)) {
return enif_make_badarg(env);
}
if (!enif_alloc_binary(clen, &c)) {
return nacl_error_tuple(env, "alloc_failed");
}
crypto_stream(c.data, c.size, n.data, k.data);
return enif_make_binary(env, &c);
}
static
ERL_NIF_TERM enif_crypto_stream_xor(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
ErlNifBinary c, m, n, k;
if (
(argc != 3) ||
(!enif_inspect_iolist_as_binary(env, argv[0], &m)) ||
(!enif_inspect_binary(env, argv[1], &n)) ||
(!enif_inspect_binary(env, argv[2], &k))) {
return enif_make_badarg(env);
}
if (
(k.size != crypto_stream_KEYBYTES) ||
(n.size != crypto_stream_NONCEBYTES)) {
return enif_make_badarg(env);
}
if (!enif_alloc_binary(m.size, &c)) {
return nacl_error_tuple(env, "alloc_failed");
}
crypto_stream_xor(c.data, m.data, m.size, n.data, k.data);
return enif_make_binary(env, &c);
}
static
ERL_NIF_TERM enif_crypto_auth(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
ErlNifBinary a,m,k;
if (
(argc != 2) ||
(!enif_inspect_iolist_as_binary(env, argv[0], &m)) ||
(!enif_inspect_binary(env, argv[1], &k))) {
return enif_make_badarg(env);
}
if (k.size != crypto_auth_KEYBYTES) {
return enif_make_badarg(env);
}
if (!enif_alloc_binary(crypto_auth_BYTES, &a)) {
return nacl_error_tuple(env, "alloc_failed");
}
crypto_auth(a.data, m.data, m.size, k.data);
return enif_make_binary(env, &a);
}
static
ERL_NIF_TERM enif_crypto_auth_verify(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
ErlNifBinary a, m, k;
if (
(argc != 3) ||
(!enif_inspect_binary(env, argv[0], &a)) ||
(!enif_inspect_iolist_as_binary(env, argv[1], &m)) ||
(!enif_inspect_binary(env, argv[2], &k))) {
return enif_make_badarg(env);
}
if (
(k.size != crypto_auth_KEYBYTES) ||
(a.size != crypto_auth_BYTES)) {
return enif_make_badarg(env);
}
if (0 == crypto_auth_verify(a.data, m.data, m.size, k.data)) {
return enif_make_atom(env, "true");
} else {
return enif_make_atom(env, "false");
}
}
static
ERL_NIF_TERM enif_crypto_shorthash(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
ErlNifBinary a,m,k;
if (
(argc != 2) ||
(!enif_inspect_iolist_as_binary(env, argv[0], &m)) ||
(!enif_inspect_binary(env, argv[1], &k))) {
return enif_make_badarg(env);
}
if (k.size != crypto_shorthash_KEYBYTES) {
return enif_make_badarg(env);
}
if (!enif_alloc_binary(crypto_shorthash_BYTES, &a)) {
return nacl_error_tuple(env, "alloc_failed");
}
crypto_shorthash(a.data, m.data, m.size, k.data);
return enif_make_binary(env, &a);
}
static
ERL_NIF_TERM enif_crypto_onetimeauth(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
ErlNifBinary a,m,k;
if (
(argc != 2) ||
(!enif_inspect_iolist_as_binary(env, argv[0], &m)) ||
(!enif_inspect_binary(env, argv[1], &k))) {
return enif_make_badarg(env);
}
if (k.size != crypto_onetimeauth_KEYBYTES) {
return enif_make_badarg(env);
}
if (!enif_alloc_binary(crypto_onetimeauth_BYTES, &a)) {
return nacl_error_tuple(env, "alloc_failed");
}
crypto_onetimeauth(a.data, m.data, m.size, k.data);
return enif_make_binary(env, &a);
}
static
ERL_NIF_TERM enif_crypto_onetimeauth_verify(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
ErlNifBinary a, m, k;
if (
(argc != 3) ||
(!enif_inspect_binary(env, argv[0], &a)) ||
(!enif_inspect_iolist_as_binary(env, argv[1], &m)) ||
(!enif_inspect_binary(env, argv[2], &k))) {
return enif_make_badarg(env);
}
if (
(k.size != crypto_onetimeauth_KEYBYTES) ||
(a.size != crypto_onetimeauth_BYTES)) {
return enif_make_badarg(env);
}
if (0 == crypto_onetimeauth_verify(a.data, m.data, m.size, k.data)) {
return enif_make_atom(env, "true");
} else {
return enif_make_atom(env, "false");
}
}
static
ERL_NIF_TERM enif_randombytes(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[])
{
unsigned req_size;
ErlNifBinary result;
if ((argc != 1) || (!enif_get_uint(env, argv[0], &req_size))) {
return enif_make_badarg(env);
}
if (!enif_alloc_binary(req_size, &result)) {
return nacl_error_tuple(env, "alloc_failed");
}
randombytes(result.data, result.size);
return enif_make_binary(env, &result);
}
/* Key exchange */
static
ERL_NIF_TERM enif_crypto_kx_SECRETKEYBYTES(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
return enif_make_int64(env, crypto_kx_SECRETKEYBYTES);
}
static
ERL_NIF_TERM enif_crypto_kx_PUBLICKEYBYTES(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
return enif_make_int64(env, crypto_kx_PUBLICKEYBYTES);
}
static
ERL_NIF_TERM enif_crypto_kx_SESSIONKEYBYTES(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
return enif_make_int64(env, crypto_kx_SESSIONKEYBYTES);
}
static
ERL_NIF_TERM enif_crypto_kx_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_kx_PUBLICKEYBYTES, &pk)) {
return nacl_error_tuple(env, "alloc_failed");
}
if (!enif_alloc_binary(crypto_kx_SECRETKEYBYTES, &sk)) {
return nacl_error_tuple(env, "alloc_failed");
}
crypto_kx_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_kx_server_session_keys(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[])
{
ErlNifBinary rx, tx, server_pk, server_sk, client_pk;
if ((argc != 3) ||
(!enif_inspect_binary(env, argv[0], &server_pk)) ||
(!enif_inspect_binary(env, argv[1], &server_sk)) ||
(!enif_inspect_binary(env, argv[2], &client_pk)) ||
(server_pk.size != crypto_kx_PUBLICKEYBYTES) ||
(server_sk.size != crypto_kx_SECRETKEYBYTES) ||
(client_pk.size != crypto_kx_PUBLICKEYBYTES)) {
return enif_make_badarg(env);
}
if (!enif_alloc_binary(crypto_kx_SESSIONKEYBYTES, &rx)) {
return nacl_error_tuple(env, "alloc_failed");
}
if (!enif_alloc_binary(crypto_kx_SESSIONKEYBYTES, &tx)) {
return nacl_error_tuple(env, "alloc_failed");
}
if( 0 != crypto_kx_server_session_keys(rx.data, tx.data, server_pk.data, server_sk.data, client_pk.data) ) {
// suspicious client public key
return nacl_error_tuple(env, "invalid_client_public_key");
}
return enif_make_tuple2(env, enif_make_binary(env, &rx), enif_make_binary(env, &tx));
}
static
ERL_NIF_TERM enif_crypto_kx_client_session_keys(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[])
{
ErlNifBinary rx, tx, client_pk, client_sk, server_pk;
if ((argc != 3) ||
(!enif_inspect_binary(env, argv[0], &client_pk)) ||
(!enif_inspect_binary(env, argv[1], &client_sk)) ||
(!enif_inspect_binary(env, argv[2], &server_pk)) ||
(client_pk.size != crypto_kx_PUBLICKEYBYTES) ||
(client_sk.size != crypto_kx_SECRETKEYBYTES) ||
(server_pk.size != crypto_kx_PUBLICKEYBYTES)) {
return enif_make_badarg(env);
}
if (!enif_alloc_binary(crypto_kx_SESSIONKEYBYTES, &rx)) {
return nacl_error_tuple(env, "alloc_failed");
}
if (!enif_alloc_binary(crypto_kx_SESSIONKEYBYTES, &tx)) {
return nacl_error_tuple(env, "alloc_failed");
}
if( 0 != crypto_kx_client_session_keys(rx.data, tx.data, client_pk.data, client_sk.data, server_pk.data) ) {
// suspicious server public key
return nacl_error_tuple(env, "invalid_server_public_key");
}
return enif_make_tuple2(env, enif_make_binary(env, &rx), enif_make_binary(env, &tx));
}
/* Various other helper functions */
static
void uint64_pack(unsigned char *y, ErlNifUInt64 x)
{
*y++ = x; x >>= 8;
*y++ = x; x >>= 8;
*y++ = x; x >>= 8;
*y++ = x; x >>= 8;
*y++ = x; x >>= 8;
*y++ = x; x >>= 8;
*y++ = x; x >>= 8;
*y++ = x; x >>= 8;
}
static
ErlNifUInt64 uint64_unpack(const unsigned char *x)
{
ErlNifUInt64 result;
result = x[7];
result <<= 8; result |= x[6];
result <<= 8; result |= x[5];
result <<= 8; result |= x[4];
result <<= 8; result |= x[3];
result <<= 8; result |= x[2];
result <<= 8; result |= x[1];
result <<= 8; result |= x[0];
return result;
}
static
int crypto_block(unsigned char *out, const unsigned char *in, const unsigned char *k)
{
ErlNifUInt64 v0 = uint64_unpack(in + 0);
ErlNifUInt64 v1 = uint64_unpack(in + 8);
ErlNifUInt64 k0 = uint64_unpack(k + 0);
ErlNifUInt64 k1 = uint64_unpack(k + 8);
ErlNifUInt64 k2 = uint64_unpack(k + 16);
ErlNifUInt64 k3 = uint64_unpack(k + 24);
ErlNifUInt64 sum = 0;
ErlNifUInt64 delta = 0x9e3779b97f4a7c15;
int i;
for (i = 0;i < 32;++i) {
sum += delta;
v0 += ((v1<<7) + k0) ^ (v1 + sum) ^ ((v1>>12) + k1);
v1 += ((v0<<16) + k2) ^ (v0 + sum) ^ ((v0>>8) + k3);
}
uint64_pack(out + 0,v0);
uint64_pack(out + 8,v1);
return 0;
}
static
ERL_NIF_TERM enif_scramble_block_16(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[])
{
ErlNifBinary in, out, key;
if (
(argc != 2) ||
(!enif_inspect_binary(env, argv[0], &in)) ||
(!enif_inspect_binary(env, argv[1], &key)) ||
(in.size != 16) || (key.size != 32)) {
return enif_make_badarg(env);
}
if (!enif_alloc_binary(in.size, &out)) {
return nacl_error_tuple(env, "alloc_failed");
}
crypto_block(out.data, in.data, key.data);
return enif_make_binary(env, &out);
}
static
ERL_NIF_TERM enif_crypto_pwhash(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
ErlNifBinary h, p, s;
// Validate the arguments
if( (argc != 2) ||
(!enif_inspect_iolist_as_binary(env, argv[0], &p)) ||
(!enif_inspect_binary(env, argv[1], &s)) ) {
return enif_make_badarg(env);
}
// Check Salt size
if(s.size != crypto_pwhash_SALTBYTES) {
return nacl_error_tuple(env, "invalid_salt_size");
}
// Allocate memory for return binary
if( !enif_alloc_binary(crypto_box_SEEDBYTES, &h) ) {
return nacl_error_tuple(env, "alloc_failed");
}
if( crypto_pwhash(h.data, h.size, (char *)p.data, p.size, s.data,
crypto_pwhash_OPSLIMIT_INTERACTIVE, crypto_pwhash_MEMLIMIT_INTERACTIVE, crypto_pwhash_ALG_DEFAULT) != 0) {
/* out of memory */
enif_release_binary(&h);
return nacl_error_tuple(env, "out_of_memory");
}
ERL_NIF_TERM ok = enif_make_atom(env, ATOM_OK);
ERL_NIF_TERM ret = enif_make_binary(env, &h);
return enif_make_tuple2(env, ok, ret);
}
static
ERL_NIF_TERM enif_crypto_pwhash_str(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
ErlNifBinary h, p;
// Validate the arguments
if( (argc != 1) ||
(!enif_inspect_iolist_as_binary(env, argv[0], &p)) ) {
return enif_make_badarg(env);
}
// Allocate memory for return binary
if( !enif_alloc_binary(crypto_pwhash_STRBYTES, &h) ) {
return nacl_error_tuple(env, "alloc_failed");
}
if( crypto_pwhash_str((char *)h.data, (char *)p.data, p.size,
crypto_pwhash_OPSLIMIT_INTERACTIVE, crypto_pwhash_MEMLIMIT_INTERACTIVE) != 0) {
/* out of memory */
enif_release_binary(&h);
return nacl_error_tuple(env, "out_of_memory");
}
ERL_NIF_TERM ok = enif_make_atom(env, ATOM_OK);
ERL_NIF_TERM ret = enif_make_binary(env, &h);
return enif_make_tuple2(env, ok, ret);
}
static
ERL_NIF_TERM enif_crypto_pwhash_str_verify(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
ErlNifBinary h, p;
// Validate the arguments
if( (argc != 2) ||
(!enif_inspect_iolist_as_binary(env, argv[0], &h)) ||
(!enif_inspect_iolist_as_binary(env, argv[1], &p)) ) {
return enif_make_badarg(env);
}
ERL_NIF_TERM retVal = enif_make_atom(env, ATOM_TRUE);
if( crypto_pwhash_str_verify((char *)h.data, (char *)p.data, p.size) != 0) {
/* wrong password */
retVal = enif_make_atom(env, ATOM_FALSE);
}
return retVal;
}
/*
* AEAD ChaCha20 Poly1305
*/
static
ERL_NIF_TERM enif_crypto_aead_chacha20poly1305_KEYBYTES(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
return enif_make_int64(env, crypto_aead_chacha20poly1305_ietf_KEYBYTES);
}
static
ERL_NIF_TERM enif_crypto_aead_chacha20poly1305_NPUBBYTES(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
return enif_make_int64(env, crypto_aead_chacha20poly1305_ietf_NPUBBYTES);
}
static
ERL_NIF_TERM enif_crypto_aead_chacha20poly1305_ABYTES(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
return enif_make_int64(env, crypto_aead_chacha20poly1305_ietf_ABYTES);
}
static
ERL_NIF_TERM enif_crypto_aead_chacha20poly1305_MESSAGEBYTES_MAX(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
return enif_make_int64(env, crypto_aead_chacha20poly1305_ietf_MESSAGEBYTES_MAX);
}
static
ERL_NIF_TERM enif_crypto_aead_chacha20poly1305_encrypt(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
ERL_NIF_TERM result;
ErlNifBinary key, nonce, ad, message, ciphertext;
if ((argc != 4) || (!enif_inspect_binary(env, argv[0], &key))
|| (!enif_inspect_binary(env, argv[1], &nonce))
|| (!enif_inspect_binary(env, argv[2], &ad))
|| (!enif_inspect_binary(env, argv[3], &message))
|| (key.size != crypto_aead_chacha20poly1305_ietf_KEYBYTES)
|| (nonce.size != crypto_aead_chacha20poly1305_ietf_NPUBBYTES)) {
return enif_make_badarg(env);
}
do
{
if (!enif_alloc_binary(message.size + crypto_aead_chacha20poly1305_ietf_ABYTES, &ciphertext)) {
result = nacl_error_tuple(env, "alloc_failed");
continue;
}
if (crypto_aead_chacha20poly1305_ietf_encrypt(ciphertext.data, NULL, message.data, message.size,
ad.data, ad.size, NULL, nonce.data, key.data) < 0) {
result = nacl_error_tuple(env, "aead_chacha20poly1305_ietf_encrypt_failed");
continue;
}
result = enif_make_binary(env, &ciphertext);
} while (0);
return result;
}
static
ERL_NIF_TERM enif_crypto_aead_chacha20poly1305_decrypt(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
ERL_NIF_TERM result;
ErlNifBinary key, nonce, ad, message, ciphertext;
if ((argc != 4) || (!enif_inspect_binary(env, argv[0], &key))
|| (!enif_inspect_binary(env, argv[1], &nonce))
|| (!enif_inspect_binary(env, argv[2], &ad))
|| (!enif_inspect_binary(env, argv[3], &ciphertext))
|| (ciphertext.size < crypto_aead_chacha20poly1305_ietf_ABYTES)
|| (key.size != crypto_aead_chacha20poly1305_ietf_KEYBYTES)
|| (nonce.size != crypto_aead_chacha20poly1305_ietf_NPUBBYTES)) {
return enif_make_badarg(env);
}
do
{
if (!enif_alloc_binary(ciphertext.size - crypto_aead_chacha20poly1305_ietf_ABYTES, &message)) {
result = nacl_error_tuple(env, "alloc_failed");
continue;
}
if (crypto_aead_chacha20poly1305_ietf_decrypt(message.data, NULL, NULL, ciphertext.data, ciphertext.size,
ad.data, ad.size, nonce.data, key.data) < 0) {
result = nacl_error_tuple(env, "aead_chacha20poly1305_ietf_decrypt_failed");
continue;
}
result = enif_make_binary(env, &message);
} while (0);
return result;
}
/*
* Generic hash
*/
static
ERL_NIF_TERM enif_crypto_generichash_BYTES(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
return enif_make_int64(env, crypto_generichash_BYTES);
}
static
ERL_NIF_TERM enif_crypto_generichash_BYTES_MIN(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
return enif_make_int64(env, crypto_generichash_BYTES_MIN);
}
static
ERL_NIF_TERM enif_crypto_generichash_BYTES_MAX(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
return enif_make_int64(env, crypto_generichash_BYTES_MAX);
}
static
ERL_NIF_TERM enif_crypto_generichash_KEYBYTES(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
return enif_make_int64(env, crypto_generichash_KEYBYTES);
}
static
ERL_NIF_TERM enif_crypto_generichash_KEYBYTES_MIN(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
return enif_make_int64(env, crypto_generichash_KEYBYTES_MIN);
}
static
ERL_NIF_TERM enif_crypto_generichash_KEYBYTES_MAX(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
return enif_make_int64(env, crypto_generichash_KEYBYTES_MAX);
}
static
ERL_NIF_TERM enif_crypto_generichash(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
ErlNifBinary hash, message, key;
unsigned hashSize;
// Validate the arguments
if( (argc != 3) ||
(!enif_get_uint(env, argv[0], &hashSize)) ||
(!enif_inspect_binary(env, argv[1], &message)) ||
(!enif_inspect_binary(env, argv[2], &key)) ) {
return enif_make_badarg(env);
}
// Verify that hash size is crypto_generichash_BYTES/crypto_generichash_BYTES_MIN/crypto_generichash_BYTES_MAX
if( (hashSize < crypto_generichash_BYTES_MIN) ||
(hashSize > crypto_generichash_BYTES_MAX) ) {
return nacl_error_tuple(env, "invalid_hash_size");
}
// validate key size
unsigned char *k = key.data;
if( 0 == key.size ) {
k = NULL;
} else if( key.size < crypto_generichash_KEYBYTES_MIN || key.size > crypto_generichash_KEYBYTES_MAX ) {
return nacl_error_tuple(env, "invalid_key_size");
}
// allocate memory for hash
if( !enif_alloc_binary(hashSize, &hash) ) {
return nacl_error_tuple(env, "alloc_failed");
}
// calculate hash
if( 0 != crypto_generichash(hash.data, hash.size, message.data, message.size, k, key.size) ) {
enif_release_binary(&hash);
return nacl_error_tuple(env, "hash_error");
}
ERL_NIF_TERM ok = enif_make_atom(env, ATOM_OK);
ERL_NIF_TERM ret = enif_make_binary(env, &hash);
return enif_make_tuple2(env, ok, ret);
}
static
crypto_generichash_state *align64(void *ptr){
if((unsigned long)ptr % 64 == 0)
return ptr;
return ptr + (64 - ((unsigned long)ptr % 64));
}
static
ERL_NIF_TERM enif_crypto_generichash_init(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
ErlNifBinary key;
unsigned hashSize;
// Validate the arguments
if( (argc != 2) ||
(!enif_get_uint(env, argv[0], &hashSize)) ||
(!enif_inspect_binary(env, argv[1], &key)) ) {
return enif_make_badarg(env);
}
// Verify that hash size is crypto_generichash_BYTES/crypto_generichash_BYTES_MIN/crypto_generichash_BYTES_MAX
if( (hashSize < crypto_generichash_BYTES_MIN) ||
(hashSize > crypto_generichash_BYTES_MAX) ) {
return nacl_error_tuple(env, "invalid_hash_size");
}
// validate key size
unsigned char *k = key.data;
if( 0 == key.size ) {
k = NULL;
} else if( key.size < crypto_generichash_KEYBYTES_MIN || key.size > crypto_generichash_KEYBYTES_MAX ) {
return nacl_error_tuple(env, "invalid_key_size");
}
// Create a resource for hash state (+ 60 to make room for 64-byte alignment)
void *state = enif_alloc_resource(generichash_state_type, crypto_generichash_statebytes() + 60);
if( !state ) {
return nacl_error_tuple(env, "alloc_failed");
}
// Call the library function
if( 0 != crypto_generichash_init(align64(state), k, key.size, hashSize) ) {
return nacl_error_tuple(env, "hash_init_error");
}
// Create return values
ERL_NIF_TERM e1 = enif_make_atom(env, "hashstate");
ERL_NIF_TERM e2 = argv[0];
ERL_NIF_TERM e3 = enif_make_resource(env, state);
// release dynamically allocated memory to erlang to mange
enif_release_resource(state);
// return a tuple
return enif_make_tuple3(env, e1, e2, e3);
}
static
ERL_NIF_TERM enif_crypto_generichash_update(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
ErlNifBinary message;
unsigned hashSize;
void *state;
// Validate the arguments
if( (argc != 3) ||
(!enif_get_uint(env, argv[0], &hashSize)) ||
(!enif_get_resource(env, argv[1], generichash_state_type, (void **)&state)) ||
(!enif_inspect_binary(env, argv[2], &message)) ) {
return enif_make_badarg(env);
}
// Verify that hash size is crypto_generichash_BYTES/crypto_generichash_BYTES_MIN/crypto_generichash_BYTES_MAX
if( (hashSize < crypto_generichash_BYTES_MIN) ||
(hashSize > crypto_generichash_BYTES_MAX) ) {
return nacl_error_tuple(env, "invalid_hash_size");
}
// Update hash state
if( 0 != crypto_generichash_update(align64(state), message.data, message.size) ) {
return nacl_error_tuple(env, "hash_update_error");
}
// Generate return value
ERL_NIF_TERM e1 = enif_make_atom(env, "hashstate");
ERL_NIF_TERM e2 = argv[0];
ERL_NIF_TERM e3 = enif_make_resource(env, state);
// return a tuple
return enif_make_tuple3(env, e1, e2, e3);
}
static
ERL_NIF_TERM enif_crypto_generichash_final(ErlNifEnv *env, int argc, ERL_NIF_TERM const argv[]) {
ErlNifBinary hash;
unsigned hashSize;
void *state;
// Validate the arguments
if( (argc != 2) ||
(!enif_get_uint(env, argv[0], &hashSize)) ||
(!enif_get_resource(env, argv[1], generichash_state_type, (void **)&state)) ) {
return enif_make_badarg(env);
}
// Verify that hash size is crypto_generichash_BYTES/crypto_generichash_BYTES_MIN/crypto_generichash_BYTES_MAX
if( (hashSize < crypto_generichash_BYTES_MIN) ||
(hashSize > crypto_generichash_BYTES_MAX) ) {
return nacl_error_tuple(env, "invalid_hash_size");
}
// allocate memory for hash
if( !enif_alloc_binary(hashSize, &hash) ) {
return nacl_error_tuple(env, "alloc_failed");
}
// calculate hash
if( 0 != crypto_generichash_final(align64(state), hash.data, hash.size) ) {
enif_release_binary(&hash);
return nacl_error_tuple(env, "hash_error");
}
ERL_NIF_TERM ok = enif_make_atom(env, ATOM_OK);
ERL_NIF_TERM ret = enif_make_binary(env, &hash);
return enif_make_tuple2(env, ok, ret);
}
/* Tie the knot to the Erlang world */
static ErlNifFunc nif_funcs[] = {
{"crypto_box_NONCEBYTES", 0, enif_crypto_box_NONCEBYTES},
{"crypto_box_ZEROBYTES", 0, enif_crypto_box_ZEROBYTES},
{"crypto_box_BOXZEROBYTES", 0, enif_crypto_box_BOXZEROBYTES},
{"crypto_box_PUBLICKEYBYTES", 0, enif_crypto_box_PUBLICKEYBYTES},
{"crypto_box_SECRETKEYBYTES", 0, enif_crypto_box_SECRETKEYBYTES},
{"crypto_box_BEFORENMBYTES", 0, enif_crypto_box_BEFORENMBYTES},
erl_nif_dirty_job_cpu_bound_macro("crypto_box_keypair", 0, enif_crypto_box_keypair),
erl_nif_dirty_job_cpu_bound_macro("crypto_box", 4, enif_crypto_box),
erl_nif_dirty_job_cpu_bound_macro("crypto_box_open", 4, enif_crypto_box_open),
{"crypto_box_beforenm", 2, enif_crypto_box_beforenm},
{"crypto_box_afternm_b", 3, enif_crypto_box_afternm},
erl_nif_dirty_job_cpu_bound_macro("crypto_box_afternm", 3, enif_crypto_box_afternm),
{"crypto_box_open_afternm_b", 3, enif_crypto_box_open_afternm},
erl_nif_dirty_job_cpu_bound_macro("crypto_box_open_afternm", 3, enif_crypto_box_open_afternm),
{"crypto_sign_PUBLICKEYBYTES", 0, enif_crypto_sign_PUBLICKEYBYTES},
{"crypto_sign_SECRETKEYBYTES", 0, enif_crypto_sign_SECRETKEYBYTES},
erl_nif_dirty_job_cpu_bound_macro("crypto_sign_keypair", 0, enif_crypto_sign_keypair),
erl_nif_dirty_job_cpu_bound_macro("crypto_sign", 2, enif_crypto_sign),
erl_nif_dirty_job_cpu_bound_macro("crypto_sign_open", 2, enif_crypto_sign_open),
erl_nif_dirty_job_cpu_bound_macro("crypto_sign_detached", 2, enif_crypto_sign_detached),
erl_nif_dirty_job_cpu_bound_macro("crypto_sign_verify_detached", 3, enif_crypto_sign_verify_detached),
{"crypto_sign_init", 0, enif_crypto_sign_init},
{"crypto_sign_update", 2, enif_crypto_sign_update},
erl_nif_dirty_job_cpu_bound_macro("crypto_sign_final_create", 2, enif_crypto_sign_final_create),
erl_nif_dirty_job_cpu_bound_macro("crypto_sign_final_verify", 3, enif_crypto_sign_final_verify),
{"crypto_box_SEALBYTES", 0, enif_crypto_box_SEALBYTES},
erl_nif_dirty_job_cpu_bound_macro("crypto_box_seal", 2, enif_crypto_box_seal),
erl_nif_dirty_job_cpu_bound_macro("crypto_box_seal_open", 3, enif_crypto_box_seal_open),
{"crypto_secretbox_NONCEBYTES", 0, enif_crypto_secretbox_NONCEBYTES},
{"crypto_secretbox_ZEROBYTES", 0, enif_crypto_secretbox_ZEROBYTES},
{"crypto_secretbox_BOXZEROBYTES", 0, enif_crypto_secretbox_BOXZEROBYTES},
{"crypto_secretbox_KEYBYTES", 0, enif_crypto_secretbox_KEYBYTES},
{"crypto_secretbox_b", 3, enif_crypto_secretbox},
erl_nif_dirty_job_cpu_bound_macro("crypto_secretbox", 3, enif_crypto_secretbox),
{"crypto_secretbox_open_b", 3, enif_crypto_secretbox_open},
erl_nif_dirty_job_cpu_bound_macro("crypto_secretbox_open", 3, enif_crypto_secretbox_open),
{"crypto_stream_chacha20_KEYBYTES", 0, enif_crypto_stream_chacha20_KEYBYTES},
{"crypto_stream_chacha20_NONCEBYTES", 0, enif_crypto_stream_chacha20_NONCEBYTES},
{"crypto_stream_chacha20_b", 3, enif_crypto_stream_chacha20},
erl_nif_dirty_job_cpu_bound_macro("crypto_stream_chacha20", 3, enif_crypto_stream_chacha20),
{"crypto_stream_chacha20_xor_b", 3, enif_crypto_stream_chacha20_xor},
erl_nif_dirty_job_cpu_bound_macro("crypto_stream_chacha20_xor", 3, enif_crypto_stream_chacha20_xor),
{"crypto_stream_KEYBYTES", 0, enif_crypto_stream_KEYBYTES},
{"crypto_stream_NONCEBYTES", 0, enif_crypto_stream_NONCEBYTES},
{"crypto_stream_b", 3, enif_crypto_stream},
erl_nif_dirty_job_cpu_bound_macro("crypto_stream", 3, enif_crypto_stream),
{"crypto_stream_xor_b", 3, enif_crypto_stream_xor},
erl_nif_dirty_job_cpu_bound_macro("crypto_stream_xor", 3, enif_crypto_stream_xor),
{"crypto_auth_BYTES", 0, enif_crypto_auth_BYTES},
{"crypto_auth_KEYBYTES", 0, enif_crypto_auth_KEYBYTES},
{"crypto_auth_b", 2, enif_crypto_auth},
erl_nif_dirty_job_cpu_bound_macro("crypto_auth", 2, enif_crypto_auth),
{"crypto_auth_verify_b", 3, enif_crypto_auth_verify},
erl_nif_dirty_job_cpu_bound_macro("crypto_auth_verify", 3, enif_crypto_auth_verify),
{"crypto_shorthash_BYTES", 0, enif_crypto_shorthash_BYTES},
{"crypto_shorthash_KEYBYTES", 0, enif_crypto_shorthash_KEYBYTES},
{"crypto_shorthash", 2, enif_crypto_shorthash},
{"crypto_onetimeauth_BYTES", 0, enif_crypto_onetimeauth_BYTES},
{"crypto_onetimeauth_KEYBYTES", 0, enif_crypto_onetimeauth_KEYBYTES},
{"crypto_onetimeauth_b", 2, enif_crypto_onetimeauth},
erl_nif_dirty_job_cpu_bound_macro("crypto_onetimeauth", 2, enif_crypto_onetimeauth),
{"crypto_onetimeauth_verify_b", 3, enif_crypto_onetimeauth_verify},
erl_nif_dirty_job_cpu_bound_macro("crypto_onetimeauth_verify", 3, enif_crypto_onetimeauth_verify),
{"crypto_hash_b", 1, enif_crypto_hash},
erl_nif_dirty_job_cpu_bound_macro("crypto_hash", 1, enif_crypto_hash),
{"crypto_verify_16", 2, enif_crypto_verify_16},
{"crypto_verify_32", 2, enif_crypto_verify_32},
{"sodium_memzero", 1, enif_sodium_memzero},
{"crypto_pwhash", 2, enif_crypto_pwhash},
{"crypto_pwhash_str", 1, enif_crypto_pwhash_str},
{"crypto_pwhash_str_verify", 2, enif_crypto_pwhash_str_verify},
erl_nif_dirty_job_cpu_bound_macro("crypto_curve25519_scalarmult", 2, enif_crypto_curve25519_scalarmult),
erl_nif_dirty_job_cpu_bound_macro("crypto_curve25519_scalarmult_base", 1, enif_crypto_curve25519_scalarmult_base),
erl_nif_dirty_job_cpu_bound_macro("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},
erl_nif_dirty_job_cpu_bound_macro("randombytes", 1, enif_randombytes),
erl_nif_dirty_job_cpu_bound_macro("crypto_kx_keypair", 0, enif_crypto_kx_keypair),
erl_nif_dirty_job_cpu_bound_macro("crypto_kx_client_session_keys", 3, enif_crypto_kx_client_session_keys),
erl_nif_dirty_job_cpu_bound_macro("crypto_kx_server_session_keys", 3, enif_crypto_kx_server_session_keys),
{"crypto_kx_PUBLICKEYBYTES", 0, enif_crypto_kx_PUBLICKEYBYTES},
{"crypto_kx_SECRETKEYBYTES", 0, enif_crypto_kx_SECRETKEYBYTES},
{"crypto_kx_SESSIONKEYBYTES", 0, enif_crypto_kx_SESSIONKEYBYTES},
{"scramble_block_16", 2, enif_scramble_block_16},
{"crypto_aead_chacha20poly1305_KEYBYTES", 0, enif_crypto_aead_chacha20poly1305_KEYBYTES},
{"crypto_aead_chacha20poly1305_NPUBBYTES", 0, enif_crypto_aead_chacha20poly1305_NPUBBYTES},
{"crypto_aead_chacha20poly1305_ABYTES", 0, enif_crypto_aead_chacha20poly1305_ABYTES},
{"crypto_aead_chacha20poly1305_MESSAGEBYTES_MAX", 0, enif_crypto_aead_chacha20poly1305_MESSAGEBYTES_MAX},
erl_nif_dirty_job_cpu_bound_macro("crypto_aead_chacha20poly1305_encrypt", 4, enif_crypto_aead_chacha20poly1305_encrypt),
erl_nif_dirty_job_cpu_bound_macro("crypto_aead_chacha20poly1305_decrypt", 4, enif_crypto_aead_chacha20poly1305_decrypt),
{"crypto_generichash_BYTES", 0, enif_crypto_generichash_BYTES},
{"crypto_generichash_BYTES_MIN", 0, enif_crypto_generichash_BYTES_MIN},
{"crypto_generichash_BYTES_MAX", 0, enif_crypto_generichash_BYTES_MAX},
{"crypto_generichash_KEYBYTES", 0, enif_crypto_generichash_KEYBYTES},
{"crypto_generichash_KEYBYTES_MIN", 0, enif_crypto_generichash_KEYBYTES_MIN},
{"crypto_generichash_KEYBYTES_MAX", 0, enif_crypto_generichash_KEYBYTES_MAX},
{"crypto_generichash", 3, enif_crypto_generichash},
{"crypto_generichash_init", 2, enif_crypto_generichash_init},
{"crypto_generichash_update", 3, enif_crypto_generichash_update},
{"crypto_generichash_final", 2, enif_crypto_generichash_final}
};
ERL_NIF_INIT(enacl_nif, nif_funcs, enif_crypto_load, NULL, NULL, NULL);
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