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libsodium c_src libsodium_api_crypto_box_curve25519xsalsa20poly1305.c
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c_src/libsodium_api_crypto_box_curve25519xsalsa20poly1305.c

// -*- mode: c; tab-width: 8; indent-tabs-mode: 1; st-rulers: [70] -*-
// vim: ts=8 sw=8 ft=c noet

#include "libsodium_api_crypto_box_curve25519xsalsa20poly1305.h"

static void	LS_API_EXEC(crypto_box_curve25519xsalsa20poly1305, seedbytes);
static void	LS_API_EXEC(crypto_box_curve25519xsalsa20poly1305, publickeybytes);
static void	LS_API_EXEC(crypto_box_curve25519xsalsa20poly1305, secretkeybytes);
static void	LS_API_EXEC(crypto_box_curve25519xsalsa20poly1305, beforenmbytes);
static void	LS_API_EXEC(crypto_box_curve25519xsalsa20poly1305, noncebytes);
static void	LS_API_EXEC(crypto_box_curve25519xsalsa20poly1305, zerobytes);
static void	LS_API_EXEC(crypto_box_curve25519xsalsa20poly1305, boxzerobytes);
static void	LS_API_EXEC(crypto_box_curve25519xsalsa20poly1305, macbytes);
static int	LS_API_INIT(crypto_box_curve25519xsalsa20poly1305, crypto_box_curve25519xsalsa20poly1305);
static void	LS_API_EXEC(crypto_box_curve25519xsalsa20poly1305, crypto_box_curve25519xsalsa20poly1305);
static int	LS_API_INIT(crypto_box_curve25519xsalsa20poly1305, open);
static void	LS_API_EXEC(crypto_box_curve25519xsalsa20poly1305, open);
static int	LS_API_INIT(crypto_box_curve25519xsalsa20poly1305, seed_keypair);
static void	LS_API_EXEC(crypto_box_curve25519xsalsa20poly1305, seed_keypair);
static void	LS_API_EXEC(crypto_box_curve25519xsalsa20poly1305, keypair);
static int	LS_API_INIT(crypto_box_curve25519xsalsa20poly1305, beforenm);
static void	LS_API_EXEC(crypto_box_curve25519xsalsa20poly1305, beforenm);
static int	LS_API_INIT(crypto_box_curve25519xsalsa20poly1305, afternm);
static void	LS_API_EXEC(crypto_box_curve25519xsalsa20poly1305, afternm);
static int	LS_API_INIT(crypto_box_curve25519xsalsa20poly1305, open_afternm);
static void	LS_API_EXEC(crypto_box_curve25519xsalsa20poly1305, open_afternm);

libsodium_function_t	libsodium_functions_crypto_box_curve25519xsalsa20poly1305[] = {
	LS_API_R_ARG0(crypto_box_curve25519xsalsa20poly1305, seedbytes),
	LS_API_R_ARG0(crypto_box_curve25519xsalsa20poly1305, publickeybytes),
	LS_API_R_ARG0(crypto_box_curve25519xsalsa20poly1305, secretkeybytes),
	LS_API_R_ARG0(crypto_box_curve25519xsalsa20poly1305, beforenmbytes),
	LS_API_R_ARG0(crypto_box_curve25519xsalsa20poly1305, noncebytes),
	LS_API_R_ARG0(crypto_box_curve25519xsalsa20poly1305, zerobytes),
	LS_API_R_ARG0(crypto_box_curve25519xsalsa20poly1305, boxzerobytes),
	LS_API_R_ARG0(crypto_box_curve25519xsalsa20poly1305, macbytes),
	LS_API_R_ARGV(crypto_box_curve25519xsalsa20poly1305, crypto_box_curve25519xsalsa20poly1305, 4),
	LS_API_R_ARGV(crypto_box_curve25519xsalsa20poly1305, open, 4),
	LS_API_R_ARGV(crypto_box_curve25519xsalsa20poly1305, seed_keypair, 1),
	LS_API_R_ARG0(crypto_box_curve25519xsalsa20poly1305, keypair),
	LS_API_R_ARGV(crypto_box_curve25519xsalsa20poly1305, beforenm, 2),	
	LS_API_R_ARGV(crypto_box_curve25519xsalsa20poly1305, afternm, 3),
	LS_API_R_ARGV(crypto_box_curve25519xsalsa20poly1305, open_afternm, 3),
	{NULL}
};

/* crypto_box_curve25519xsalsa20poly1305_seedbytes/0 */

LS_API_GET_SIZE(crypto_box_curve25519xsalsa20poly1305, seedbytes);

/* crypto_box_curve25519xsalsa20poly1305_publickeybytes/0 */

LS_API_GET_SIZE(crypto_box_curve25519xsalsa20poly1305, publickeybytes);

/* crypto_box_curve25519xsalsa20poly1305_secretkeybytes/0 */

LS_API_GET_SIZE(crypto_box_curve25519xsalsa20poly1305, secretkeybytes);

/* crypto_box_curve25519xsalsa20poly1305_beforenmbytes/0 */

LS_API_GET_SIZE(crypto_box_curve25519xsalsa20poly1305, beforenmbytes);

/* crypto_box_curve25519xsalsa20poly1305_noncebytes/0 */

LS_API_GET_SIZE(crypto_box_curve25519xsalsa20poly1305, noncebytes);

/* crypto_box_curve25519xsalsa20poly1305_zerobytes/0 */

LS_API_GET_SIZE(crypto_box_curve25519xsalsa20poly1305, zerobytes);

/* crypto_box_curve25519xsalsa20poly1305_boxzerobytes/0 */

LS_API_GET_SIZE(crypto_box_curve25519xsalsa20poly1305, boxzerobytes);

/* crypto_box_curve25519xsalsa20poly1305_macbytes/0 */

LS_API_GET_SIZE(crypto_box_curve25519xsalsa20poly1305, macbytes);

/* crypto_box_curve25519xsalsa20poly1305_crypto_box_curve25519xsalsa20poly1305/4 */

typedef struct LS_API_F_ARGV(crypto_box_curve25519xsalsa20poly1305, crypto_box_curve25519xsalsa20poly1305) {
	const unsigned char	*m;
	unsigned long long	mlen;
	const unsigned char	*n;
	const unsigned char	*pk;
	const unsigned char	*sk;
} LS_API_F_ARGV_T(crypto_box_curve25519xsalsa20poly1305, crypto_box_curve25519xsalsa20poly1305);

static int
LS_API_INIT(crypto_box_curve25519xsalsa20poly1305, crypto_box_curve25519xsalsa20poly1305)
{
	LS_API_F_ARGV_T(crypto_box_curve25519xsalsa20poly1305, crypto_box_curve25519xsalsa20poly1305) *argv;
	int skip;
	int type;
	int type_length;
	unsigned long long mlen;
	size_t noncebytes;
	size_t publickeybytes;
	size_t secretkeybytes;
	ErlDrvSizeT x;
	void *p;

	if (ei_get_type(buffer, index, &type, &type_length) < 0
			|| type != ERL_BINARY_EXT) {
		return -1;
	}

	mlen = (unsigned long long)(type_length);

	skip = *index;

	if (ei_skip_term(buffer, &skip) < 0) {
		return -1;
	}

	noncebytes = crypto_box_curve25519xsalsa20poly1305_noncebytes();

	if (ei_get_type(buffer, &skip, &type, &type_length) < 0
			|| type != ERL_BINARY_EXT
			|| type_length != noncebytes) {
		return -1;
	}

	if (ei_skip_term(buffer, &skip) < 0) {
		return -1;
	}

	publickeybytes = crypto_box_curve25519xsalsa20poly1305_publickeybytes();

	if (ei_get_type(buffer, &skip, &type, &type_length) < 0
			|| type != ERL_BINARY_EXT
			|| type_length != publickeybytes) {
		return -1;
	}

	if (ei_skip_term(buffer, &skip) < 0) {
		return -1;
	}

	secretkeybytes = crypto_box_curve25519xsalsa20poly1305_secretkeybytes();

	if (ei_get_type(buffer, &skip, &type, &type_length) < 0
			|| type != ERL_BINARY_EXT
			|| type_length != secretkeybytes) {
		return -1;
	}

	x = (ErlDrvSizeT)(mlen + noncebytes + publickeybytes + secretkeybytes + (sizeof (LS_API_F_ARGV_T(crypto_box_curve25519xsalsa20poly1305, crypto_box_curve25519xsalsa20poly1305))));
	p = (void *)(driver_alloc(x));

	if (p == NULL) {
		return -1;
	}

	argv = (LS_API_F_ARGV_T(crypto_box_curve25519xsalsa20poly1305, crypto_box_curve25519xsalsa20poly1305) *)(p);
	p += (sizeof (LS_API_F_ARGV_T(crypto_box_curve25519xsalsa20poly1305, crypto_box_curve25519xsalsa20poly1305)));
	argv->m = (const unsigned char *)(p);
	p += mlen;
	argv->n = (const unsigned char *)(p);
	p += noncebytes;
	argv->pk = (const unsigned char *)(p);
	p += publickeybytes;
	argv->sk = (const unsigned char *)(p);

	if (ei_decode_binary(buffer, index, (void *)(argv->m), (long *)&(argv->mlen)) < 0) {
		(void) driver_free(argv);
		return -1;
	}

	if (ei_decode_binary(buffer, index, (void *)(argv->n), NULL) < 0) {
		(void) driver_free(argv);
		return -1;
	}

	if (ei_decode_binary(buffer, index, (void *)(argv->pk), NULL) < 0) {
		(void) driver_free(argv);
		return -1;
	}

	if (ei_decode_binary(buffer, index, (void *)(argv->sk), NULL) < 0) {
		(void) driver_free(argv);
		return -1;
	}

	request->argv = (void *)(argv);

	return 0;
}

static void
LS_API_EXEC(crypto_box_curve25519xsalsa20poly1305, crypto_box_curve25519xsalsa20poly1305)
{
	LS_API_F_ARGV_T(crypto_box_curve25519xsalsa20poly1305, crypto_box_curve25519xsalsa20poly1305) *argv;
	LS_API_READ_ARGV(crypto_box_curve25519xsalsa20poly1305, crypto_box_curve25519xsalsa20poly1305);

	size_t clen = argv->mlen;
	unsigned char c[clen];

	LS_SAFE_REPLY(crypto_box_curve25519xsalsa20poly1305(c, argv->m, argv->mlen, argv->n, argv->pk, argv->sk), LS_PROTECT({
		LS_RES_TAG(request),
		ERL_DRV_BUF2BINARY, (ErlDrvTermData)(c), clen,
		ERL_DRV_TUPLE, 2
	}), __FILE__, __LINE__);

	(void) sodium_memzero(c, clen);
}

/* crypto_box_curve25519xsalsa20poly1305_open/4 */

typedef struct LS_API_F_ARGV(crypto_box_curve25519xsalsa20poly1305, open) {
	const unsigned char	*c;
	unsigned long long	clen;
	const unsigned char	*n;
	const unsigned char	*pk;
	const unsigned char	*sk;
} LS_API_F_ARGV_T(crypto_box_curve25519xsalsa20poly1305, open);

static int
LS_API_INIT(crypto_box_curve25519xsalsa20poly1305, open)
{
	LS_API_F_ARGV_T(crypto_box_curve25519xsalsa20poly1305, open) *argv;
	int skip;
	int type;
	int type_length;
	unsigned long long clen;
	size_t noncebytes;
	size_t publickeybytes;
	size_t secretkeybytes;
	ErlDrvSizeT x;
	void *p;

	if (ei_get_type(buffer, index, &type, &type_length) < 0
			|| type != ERL_BINARY_EXT) {
		return -1;
	}

	clen = (unsigned long long)(type_length);

	skip = *index;

	if (ei_skip_term(buffer, &skip) < 0) {
		return -1;
	}

	noncebytes = crypto_box_curve25519xsalsa20poly1305_noncebytes();

	if (ei_get_type(buffer, &skip, &type, &type_length) < 0
			|| type != ERL_BINARY_EXT
			|| type_length != noncebytes) {
		return -1;
	}

	if (ei_skip_term(buffer, &skip) < 0) {
		return -1;
	}

	publickeybytes = crypto_box_curve25519xsalsa20poly1305_publickeybytes();

	if (ei_get_type(buffer, &skip, &type, &type_length) < 0
			|| type != ERL_BINARY_EXT
			|| type_length != publickeybytes) {
		return -1;
	}

	if (ei_skip_term(buffer, &skip) < 0) {
		return -1;
	}

	secretkeybytes = crypto_box_curve25519xsalsa20poly1305_secretkeybytes();

	if (ei_get_type(buffer, &skip, &type, &type_length) < 0
			|| type != ERL_BINARY_EXT
			|| type_length != secretkeybytes) {
		return -1;
	}

	x = (ErlDrvSizeT)(clen + noncebytes + publickeybytes + secretkeybytes + (sizeof (LS_API_F_ARGV_T(crypto_box_curve25519xsalsa20poly1305, open))));
	p = (void *)(driver_alloc(x));

	if (p == NULL) {
		return -1;
	}

	argv = (LS_API_F_ARGV_T(crypto_box_curve25519xsalsa20poly1305, open) *)(p);
	p += (sizeof (LS_API_F_ARGV_T(crypto_box_curve25519xsalsa20poly1305, open)));
	argv->c = (const unsigned char *)(p);
	p += clen;
	argv->n = (const unsigned char *)(p);
	p += noncebytes;
	argv->pk = (const unsigned char *)(p);
	p += publickeybytes;
	argv->sk = (const unsigned char *)(p);

	if (ei_decode_binary(buffer, index, (void *)(argv->c), (long *)&(argv->clen)) < 0) {
		(void) driver_free(argv);
		return -1;
	}

	if (ei_decode_binary(buffer, index, (void *)(argv->n), NULL) < 0) {
		(void) driver_free(argv);
		return -1;
	}

	if (ei_decode_binary(buffer, index, (void *)(argv->pk), NULL) < 0) {
		(void) driver_free(argv);
		return -1;
	}

	if (ei_decode_binary(buffer, index, (void *)(argv->sk), NULL) < 0) {
		(void) driver_free(argv);
		return -1;
	}

	request->argv = (void *)(argv);

	return 0;
}

static void
LS_API_EXEC(crypto_box_curve25519xsalsa20poly1305, open)
{
	LS_API_F_ARGV_T(crypto_box_curve25519xsalsa20poly1305, open) *argv;
	LS_API_READ_ARGV(crypto_box_curve25519xsalsa20poly1305, open);

	size_t mlen = argv->clen;
	unsigned char m[mlen];

	LS_SAFE_REPLY(crypto_box_curve25519xsalsa20poly1305_open(m, argv->c, argv->clen, argv->n, argv->pk, argv->sk), LS_PROTECT({
		LS_RES_TAG(request),
		ERL_DRV_BUF2BINARY, (ErlDrvTermData)(m), mlen,
		ERL_DRV_TUPLE, 2
	}), __FILE__, __LINE__);

	(void) sodium_memzero(m, mlen);
}

/* crypto_box_curve25519xsalsa20poly1305_seed_keypair/1 */

typedef struct LS_API_F_ARGV(crypto_box_curve25519xsalsa20poly1305, seed_keypair) {
	const unsigned char	*seed;
} LS_API_F_ARGV_T(crypto_box_curve25519xsalsa20poly1305, seed_keypair);

static int
LS_API_INIT(crypto_box_curve25519xsalsa20poly1305, seed_keypair)
{
	LS_API_F_ARGV_T(crypto_box_curve25519xsalsa20poly1305, seed_keypair) *argv;
	int type;
	int type_length;
	size_t seedbytes;
	ErlDrvSizeT x;
	void *p;

	seedbytes = crypto_box_curve25519xsalsa20poly1305_seedbytes();

	if (ei_get_type(buffer, index, &type, &type_length) < 0
			|| type != ERL_BINARY_EXT
			|| type_length != seedbytes) {
		return -1;
	}

	x = (ErlDrvSizeT)(seedbytes + (sizeof (LS_API_F_ARGV_T(crypto_box_curve25519xsalsa20poly1305, seed_keypair))));
	p = (void *)(driver_alloc(x));

	if (p == NULL) {
		return -1;
	}

	argv = (LS_API_F_ARGV_T(crypto_box_curve25519xsalsa20poly1305, seed_keypair) *)(p);
	p += (sizeof (LS_API_F_ARGV_T(crypto_box_curve25519xsalsa20poly1305, seed_keypair)));
	argv->seed = (const unsigned char *)(p);

	if (ei_decode_binary(buffer, index, (void *)(argv->seed), NULL) < 0) {
		(void) driver_free(argv);
		return -1;
	}

	request->argv = (void *)(argv);

	return 0;
}

static void
LS_API_EXEC(crypto_box_curve25519xsalsa20poly1305, seed_keypair)
{
	LS_API_F_ARGV_T(crypto_box_curve25519xsalsa20poly1305, seed_keypair) *argv;
	LS_API_READ_ARGV(crypto_box_curve25519xsalsa20poly1305, seed_keypair);

	size_t publickeybytes = crypto_box_curve25519xsalsa20poly1305_publickeybytes();
	size_t secretkeybytes = crypto_box_curve25519xsalsa20poly1305_secretkeybytes();

	unsigned char pk[publickeybytes];
	unsigned char sk[secretkeybytes];

	LS_SAFE_REPLY(crypto_box_curve25519xsalsa20poly1305_seed_keypair(pk, sk, argv->seed), LS_PROTECT({
		LS_RES_TAG(request),
		ERL_DRV_BUF2BINARY, (ErlDrvTermData)(pk), publickeybytes,
		ERL_DRV_BUF2BINARY, (ErlDrvTermData)(sk), secretkeybytes,
		ERL_DRV_TUPLE, 2,
		ERL_DRV_TUPLE, 2
	}), __FILE__, __LINE__);

	(void) sodium_memzero(pk, publickeybytes);
	(void) sodium_memzero(sk, secretkeybytes);
}

/* crypto_box_curve25519xsalsa20poly1305_keypair/0 */

static void
LS_API_EXEC(crypto_box_curve25519xsalsa20poly1305, keypair)
{
	size_t publickeybytes = crypto_box_curve25519xsalsa20poly1305_publickeybytes();
	size_t secretkeybytes = crypto_box_curve25519xsalsa20poly1305_secretkeybytes();

	unsigned char pk[publickeybytes];
	unsigned char sk[secretkeybytes];

	LS_SAFE_REPLY(crypto_box_curve25519xsalsa20poly1305_keypair(pk, sk), LS_PROTECT({
		LS_RES_TAG(request),
		ERL_DRV_BUF2BINARY, (ErlDrvTermData)(pk), publickeybytes,
		ERL_DRV_BUF2BINARY, (ErlDrvTermData)(sk), secretkeybytes,
		ERL_DRV_TUPLE, 2,
		ERL_DRV_TUPLE, 2
	}), __FILE__, __LINE__);

	(void) sodium_memzero(pk, publickeybytes);
	(void) sodium_memzero(sk, secretkeybytes);
}

/* crypto_box_curve25519xsalsa20poly1305_beforenm/2 */

typedef struct LS_API_F_ARGV(crypto_box_curve25519xsalsa20poly1305, beforenm) {
	const unsigned char	*pk;
	const unsigned char	*sk;
} LS_API_F_ARGV_T(crypto_box_curve25519xsalsa20poly1305, beforenm);

static int
LS_API_INIT(crypto_box_curve25519xsalsa20poly1305, beforenm)
{
	LS_API_F_ARGV_T(crypto_box_curve25519xsalsa20poly1305, beforenm) *argv;
	int skip;
	int type;
	int type_length;
	size_t publickeybytes;
	size_t secretkeybytes;
	ErlDrvSizeT x;
	void *p;

	publickeybytes = crypto_box_curve25519xsalsa20poly1305_publickeybytes();

	if (ei_get_type(buffer, index, &type, &type_length) < 0
			|| type != ERL_BINARY_EXT
			|| type_length != publickeybytes) {
		return -1;
	}

	skip = *index;

	if (ei_skip_term(buffer, &skip) < 0) {
		return -1;
	}

	secretkeybytes = crypto_box_curve25519xsalsa20poly1305_secretkeybytes();

	if (ei_get_type(buffer, &skip, &type, &type_length) < 0
			|| type != ERL_BINARY_EXT
			|| type_length != secretkeybytes) {
		return -1;
	}

	x = (ErlDrvSizeT)(publickeybytes + secretkeybytes + (sizeof (LS_API_F_ARGV_T(crypto_box_curve25519xsalsa20poly1305, beforenm))));
	p = (void *)(driver_alloc(x));

	if (p == NULL) {
		return -1;
	}

	argv = (LS_API_F_ARGV_T(crypto_box_curve25519xsalsa20poly1305, beforenm) *)(p);
	p += (sizeof (LS_API_F_ARGV_T(crypto_box_curve25519xsalsa20poly1305, beforenm)));
	argv->pk = (const unsigned char *)(p);
	p += publickeybytes;
	argv->sk = (const unsigned char *)(p);

	if (ei_decode_binary(buffer, index, (void *)(argv->pk), NULL) < 0) {
		(void) driver_free(argv);
		return -1;
	}

	if (ei_decode_binary(buffer, index, (void *)(argv->sk), NULL) < 0) {
		(void) driver_free(argv);
		return -1;
	}

	request->argv = (void *)(argv);

	return 0;
}

int crypto_box_curve25519xsalsa20poly1305_beforenm(unsigned char *k, const unsigned char *pk,
                        const unsigned char *sk)
            __attribute__ ((warn_unused_result));

static void
LS_API_EXEC(crypto_box_curve25519xsalsa20poly1305, beforenm)
{
	LS_API_F_ARGV_T(crypto_box_curve25519xsalsa20poly1305, beforenm) *argv;
	LS_API_READ_ARGV(crypto_box_curve25519xsalsa20poly1305, beforenm);

	size_t beforenmbytes = crypto_box_curve25519xsalsa20poly1305_beforenmbytes();
	unsigned char k[beforenmbytes];

	LS_SAFE_REPLY(crypto_box_curve25519xsalsa20poly1305_beforenm(k, argv->pk, argv->sk), LS_PROTECT({
		LS_RES_TAG(request),
		ERL_DRV_BUF2BINARY, (ErlDrvTermData)(k), beforenmbytes,
		ERL_DRV_TUPLE, 2
	}), __FILE__, __LINE__);

	(void) sodium_memzero(k, beforenmbytes);
}

/* crypto_box_curve25519xsalsa20poly1305_afternm/3 */

typedef struct LS_API_F_ARGV(crypto_box_curve25519xsalsa20poly1305, afternm) {
	const unsigned char	*m;
	unsigned long long	mlen;
	const unsigned char	*n;
	const unsigned char	*k;
} LS_API_F_ARGV_T(crypto_box_curve25519xsalsa20poly1305, afternm);

static int
LS_API_INIT(crypto_box_curve25519xsalsa20poly1305, afternm)
{
	LS_API_F_ARGV_T(crypto_box_curve25519xsalsa20poly1305, afternm) *argv;
	int skip;
	int type;
	int type_length;
	unsigned long long mlen;
	size_t noncebytes;
	size_t beforenmbytes;
	ErlDrvSizeT x;
	void *p;

	if (ei_get_type(buffer, index, &type, &type_length) < 0
			|| type != ERL_BINARY_EXT) {
		return -1;
	}

	mlen = (unsigned long long)(type_length);

	skip = *index;

	if (ei_skip_term(buffer, &skip) < 0) {
		return -1;
	}

	noncebytes = crypto_box_curve25519xsalsa20poly1305_noncebytes();

	if (ei_get_type(buffer, &skip, &type, &type_length) < 0
			|| type != ERL_BINARY_EXT
			|| type_length != noncebytes) {
		return -1;
	}

	if (ei_skip_term(buffer, &skip) < 0) {
		return -1;
	}

	beforenmbytes = crypto_box_curve25519xsalsa20poly1305_beforenmbytes();

	if (ei_get_type(buffer, &skip, &type, &type_length) < 0
			|| type != ERL_BINARY_EXT
			|| type_length != beforenmbytes) {
		return -1;
	}

	x = (ErlDrvSizeT)(mlen + noncebytes + beforenmbytes + (sizeof (LS_API_F_ARGV_T(crypto_box_curve25519xsalsa20poly1305, afternm))));
	p = (void *)(driver_alloc(x));

	if (p == NULL) {
		return -1;
	}

	argv = (LS_API_F_ARGV_T(crypto_box_curve25519xsalsa20poly1305, afternm) *)(p);
	p += (sizeof (LS_API_F_ARGV_T(crypto_box_curve25519xsalsa20poly1305, afternm)));
	argv->m = (const unsigned char *)(p);
	p += mlen;
	argv->n = (const unsigned char *)(p);
	p += noncebytes;
	argv->k = (const unsigned char *)(p);

	if (ei_decode_binary(buffer, index, (void *)(argv->m), (long *)&(argv->mlen)) < 0) {
		(void) driver_free(argv);
		return -1;
	}

	if (ei_decode_binary(buffer, index, (void *)(argv->n), NULL) < 0) {
		(void) driver_free(argv);
		return -1;
	}

	if (ei_decode_binary(buffer, index, (void *)(argv->k), NULL) < 0) {
		(void) driver_free(argv);
		return -1;
	}

	request->argv = (void *)(argv);

	return 0;
}

static void
LS_API_EXEC(crypto_box_curve25519xsalsa20poly1305, afternm)
{
	LS_API_F_ARGV_T(crypto_box_curve25519xsalsa20poly1305, afternm) *argv;
	LS_API_READ_ARGV(crypto_box_curve25519xsalsa20poly1305, afternm);

	size_t clen = argv->mlen;
	unsigned char c[clen];

	LS_SAFE_REPLY(crypto_box_curve25519xsalsa20poly1305_afternm(c, argv->m, argv->mlen, argv->n, argv->k), LS_PROTECT({
		LS_RES_TAG(request),
		ERL_DRV_BUF2BINARY, (ErlDrvTermData)(c), clen,
		ERL_DRV_TUPLE, 2
	}), __FILE__, __LINE__);

	(void) sodium_memzero(c, clen);
}

/* crypto_box_curve25519xsalsa20poly1305_open_afternm/3 */

typedef struct LS_API_F_ARGV(crypto_box_curve25519xsalsa20poly1305, open_afternm) {
	const unsigned char	*c;
	unsigned long long	clen;
	const unsigned char	*n;
	const unsigned char	*k;
} LS_API_F_ARGV_T(crypto_box_curve25519xsalsa20poly1305, open_afternm);

static int
LS_API_INIT(crypto_box_curve25519xsalsa20poly1305, open_afternm)
{
	LS_API_F_ARGV_T(crypto_box_curve25519xsalsa20poly1305, open_afternm) *argv;
	int skip;
	int type;
	int type_length;
	unsigned long long clen;
	size_t noncebytes;
	size_t beforenmbytes;
	ErlDrvSizeT x;
	void *p;

	if (ei_get_type(buffer, index, &type, &type_length) < 0
			|| type != ERL_BINARY_EXT) {
		return -1;
	}

	clen = (unsigned long long)(type_length);

	skip = *index;

	if (ei_skip_term(buffer, &skip) < 0) {
		return -1;
	}

	noncebytes = crypto_box_curve25519xsalsa20poly1305_noncebytes();

	if (ei_get_type(buffer, &skip, &type, &type_length) < 0
			|| type != ERL_BINARY_EXT
			|| type_length != noncebytes) {
		return -1;
	}

	if (ei_skip_term(buffer, &skip) < 0) {
		return -1;
	}

	beforenmbytes = crypto_box_curve25519xsalsa20poly1305_beforenmbytes();

	if (ei_get_type(buffer, &skip, &type, &type_length) < 0
			|| type != ERL_BINARY_EXT
			|| type_length != beforenmbytes) {
		return -1;
	}

	x = (ErlDrvSizeT)(clen + noncebytes + beforenmbytes + (sizeof (LS_API_F_ARGV_T(crypto_box_curve25519xsalsa20poly1305, open_afternm))));
	p = (void *)(driver_alloc(x));

	if (p == NULL) {
		return -1;
	}

	argv = (LS_API_F_ARGV_T(crypto_box_curve25519xsalsa20poly1305, open_afternm) *)(p);
	p += (sizeof (LS_API_F_ARGV_T(crypto_box_curve25519xsalsa20poly1305, open_afternm)));
	argv->c = (const unsigned char *)(p);
	p += clen;
	argv->n = (const unsigned char *)(p);
	p += noncebytes;
	argv->k = (const unsigned char *)(p);

	if (ei_decode_binary(buffer, index, (void *)(argv->c), (long *)&(argv->clen)) < 0) {
		(void) driver_free(argv);
		return -1;
	}

	if (ei_decode_binary(buffer, index, (void *)(argv->n), NULL) < 0) {
		(void) driver_free(argv);
		return -1;
	}

	if (ei_decode_binary(buffer, index, (void *)(argv->k), NULL) < 0) {
		(void) driver_free(argv);
		return -1;
	}

	request->argv = (void *)(argv);

	return 0;
}

static void
LS_API_EXEC(crypto_box_curve25519xsalsa20poly1305, open_afternm)
{
	LS_API_F_ARGV_T(crypto_box_curve25519xsalsa20poly1305, open_afternm) *argv;
	LS_API_READ_ARGV(crypto_box_curve25519xsalsa20poly1305, open_afternm);

	size_t mlen = argv->clen;
	unsigned char m[mlen];

	LS_SAFE_REPLY(crypto_box_curve25519xsalsa20poly1305_open_afternm(m, argv->c, argv->clen, argv->n, argv->k), LS_PROTECT({
		LS_RES_TAG(request),
		ERL_DRV_BUF2BINARY, (ErlDrvTermData)(m), mlen,
		ERL_DRV_TUPLE, 2
	}), __FILE__, __LINE__);

	(void) sodium_memzero(m, mlen);
}
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