[thirdparty/openssh-portable.git] / ssh-ed25519.c

/* $OpenBSD: ssh-ed25519.c,v 1.19 2022/10/28 00:44:44 djm Exp $ */
/*
 * Copyright (c) 2013 Markus Friedl <markus@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include "includes.h"

#include <sys/types.h>
#include <limits.h>

#include "crypto_api.h"

#include <string.h>
#include <stdarg.h>

#include "log.h"
#include "sshbuf.h"
#define SSHKEY_INTERNAL
#include "sshkey.h"
#include "ssherr.h"
#include "ssh.h"

static void
ssh_ed25519_cleanup(struct sshkey *k)
{
	freezero(k->ed25519_pk, ED25519_PK_SZ);
	freezero(k->ed25519_sk, ED25519_SK_SZ);
	k->ed25519_pk = NULL;
	k->ed25519_sk = NULL;
}

static int
ssh_ed25519_equal(const struct sshkey *a, const struct sshkey *b)
{
	if (a->ed25519_pk == NULL || b->ed25519_pk == NULL)
		return 0;
	if (memcmp(a->ed25519_pk, b->ed25519_pk, ED25519_PK_SZ) != 0)
		return 0;
	return 1;
}

static int
ssh_ed25519_serialize_public(const struct sshkey *key, struct sshbuf *b,
    enum sshkey_serialize_rep opts)
{
	int r;

	if (key->ed25519_pk == NULL)
		return SSH_ERR_INVALID_ARGUMENT;
	if ((r = sshbuf_put_string(b, key->ed25519_pk, ED25519_PK_SZ)) != 0)
		return r;

	return 0;
}

static int
ssh_ed25519_serialize_private(const struct sshkey *key, struct sshbuf *b,
    enum sshkey_serialize_rep opts)
{
	int r;

	if ((r = sshbuf_put_string(b, key->ed25519_pk, ED25519_PK_SZ)) != 0 ||
	    (r = sshbuf_put_string(b, key->ed25519_sk, ED25519_SK_SZ)) != 0)
		return r;

	return 0;
}

static int
ssh_ed25519_generate(struct sshkey *k, int bits)
{
	if ((k->ed25519_pk = malloc(ED25519_PK_SZ)) == NULL ||
	    (k->ed25519_sk = malloc(ED25519_SK_SZ)) == NULL)
		return SSH_ERR_ALLOC_FAIL;
	crypto_sign_ed25519_keypair(k->ed25519_pk, k->ed25519_sk);
	return 0;
}

static int
ssh_ed25519_copy_public(const struct sshkey *from, struct sshkey *to)
{
	if (from->ed25519_pk == NULL)
		return 0; /* XXX SSH_ERR_INTERNAL_ERROR ? */
	if ((to->ed25519_pk = malloc(ED25519_PK_SZ)) == NULL)
		return SSH_ERR_ALLOC_FAIL;
	memcpy(to->ed25519_pk, from->ed25519_pk, ED25519_PK_SZ);
	return 0;
}

static int
ssh_ed25519_deserialize_public(const char *ktype, struct sshbuf *b,
    struct sshkey *key)
{
	u_char *pk = NULL;
	size_t len = 0;
	int r;

	if ((r = sshbuf_get_string(b, &pk, &len)) != 0)
		return r;
	if (len != ED25519_PK_SZ) {
		freezero(pk, len);
		return SSH_ERR_INVALID_FORMAT;
	}
	key->ed25519_pk = pk;
	return 0;
}

static int
ssh_ed25519_deserialize_private(const char *ktype, struct sshbuf *b,
    struct sshkey *key)
{
	int r;
	size_t sklen = 0;
	u_char *ed25519_sk = NULL;

	if ((r = ssh_ed25519_deserialize_public(NULL, b, key)) != 0)
		goto out;
	if ((r = sshbuf_get_string(b, &ed25519_sk, &sklen)) != 0)
		goto out;
	if (sklen != ED25519_SK_SZ) {
		r = SSH_ERR_INVALID_FORMAT;
		goto out;
	}
	key->ed25519_sk = ed25519_sk;
	ed25519_sk = NULL; /* transferred */
	/* success */
	r = 0;
 out:
	freezero(ed25519_sk, sklen);
	return r;
}

static int
ssh_ed25519_sign(struct sshkey *key,
    u_char **sigp, size_t *lenp,
    const u_char *data, size_t datalen,
    const char *alg, const char *sk_provider, const char *sk_pin, u_int compat)
{
	u_char *sig = NULL;
	size_t slen = 0, len;
	unsigned long long smlen;
	int r, ret;
	struct sshbuf *b = NULL;

	if (lenp != NULL)
		*lenp = 0;
	if (sigp != NULL)
		*sigp = NULL;

	if (key == NULL ||
	    sshkey_type_plain(key->type) != KEY_ED25519 ||
	    key->ed25519_sk == NULL ||
	    datalen >= INT_MAX - crypto_sign_ed25519_BYTES)
		return SSH_ERR_INVALID_ARGUMENT;
	smlen = slen = datalen + crypto_sign_ed25519_BYTES;
	if ((sig = malloc(slen)) == NULL)
		return SSH_ERR_ALLOC_FAIL;

	if ((ret = crypto_sign_ed25519(sig, &smlen, data, datalen,
	    key->ed25519_sk)) != 0 || smlen <= datalen) {
		r = SSH_ERR_INVALID_ARGUMENT; /* XXX better error? */
		goto out;
	}
	/* encode signature */
	if ((b = sshbuf_new()) == NULL) {
		r = SSH_ERR_ALLOC_FAIL;
		goto out;
	}
	if ((r = sshbuf_put_cstring(b, "ssh-ed25519")) != 0 ||
	    (r = sshbuf_put_string(b, sig, smlen - datalen)) != 0)
		goto out;
	len = sshbuf_len(b);
	if (sigp != NULL) {
		if ((*sigp = malloc(len)) == NULL) {
			r = SSH_ERR_ALLOC_FAIL;
			goto out;
		}
		memcpy(*sigp, sshbuf_ptr(b), len);
	}
	if (lenp != NULL)
		*lenp = len;
	/* success */
	r = 0;
 out:
	sshbuf_free(b);
	if (sig != NULL)
		freezero(sig, slen);

	return r;
}

static int
ssh_ed25519_verify(const struct sshkey *key,
    const u_char *sig, size_t siglen,
    const u_char *data, size_t dlen, const char *alg, u_int compat,
    struct sshkey_sig_details **detailsp)
{
	struct sshbuf *b = NULL;
	char *ktype = NULL;
	const u_char *sigblob;
	u_char *sm = NULL, *m = NULL;
	size_t len;
	unsigned long long smlen = 0, mlen = 0;
	int r, ret;

	if (key == NULL ||
	    sshkey_type_plain(key->type) != KEY_ED25519 ||
	    key->ed25519_pk == NULL ||
	    dlen >= INT_MAX - crypto_sign_ed25519_BYTES ||
	    sig == NULL || siglen == 0)
		return SSH_ERR_INVALID_ARGUMENT;

	if ((b = sshbuf_from(sig, siglen)) == NULL)
		return SSH_ERR_ALLOC_FAIL;
	if ((r = sshbuf_get_cstring(b, &ktype, NULL)) != 0 ||
	    (r = sshbuf_get_string_direct(b, &sigblob, &len)) != 0)
		goto out;
	if (strcmp("ssh-ed25519", ktype) != 0) {
		r = SSH_ERR_KEY_TYPE_MISMATCH;
		goto out;
	}
	if (sshbuf_len(b) != 0) {
		r = SSH_ERR_UNEXPECTED_TRAILING_DATA;
		goto out;
	}
	if (len > crypto_sign_ed25519_BYTES) {
		r = SSH_ERR_INVALID_FORMAT;
		goto out;
	}
	if (dlen >= SIZE_MAX - len) {
		r = SSH_ERR_INVALID_ARGUMENT;
		goto out;
	}
	smlen = len + dlen;
	mlen = smlen;
	if ((sm = malloc(smlen)) == NULL || (m = malloc(mlen)) == NULL) {
		r = SSH_ERR_ALLOC_FAIL;
		goto out;
	}
	memcpy(sm, sigblob, len);
	memcpy(sm+len, data, dlen);
	if ((ret = crypto_sign_ed25519_open(m, &mlen, sm, smlen,
	    key->ed25519_pk)) != 0) {
		debug2_f("crypto_sign_ed25519_open failed: %d", ret);
	}
	if (ret != 0 || mlen != dlen) {
		r = SSH_ERR_SIGNATURE_INVALID;
		goto out;
	}
	/* XXX compare 'm' and 'data' ? */
	/* success */
	r = 0;
 out:
	if (sm != NULL)
		freezero(sm, smlen);
	if (m != NULL)
		freezero(m, smlen); /* NB mlen may be invalid if r != 0 */
	sshbuf_free(b);
	free(ktype);
	return r;
}

/* NB. not static; used by ED25519-SK */
const struct sshkey_impl_funcs sshkey_ed25519_funcs = {
	/* .size = */		NULL,
	/* .alloc = */		NULL,
	/* .cleanup = */	ssh_ed25519_cleanup,
	/* .equal = */		ssh_ed25519_equal,
	/* .ssh_serialize_public = */ ssh_ed25519_serialize_public,
	/* .ssh_deserialize_public = */ ssh_ed25519_deserialize_public,
	/* .ssh_serialize_private = */ ssh_ed25519_serialize_private,
	/* .ssh_deserialize_private = */ ssh_ed25519_deserialize_private,
	/* .generate = */	ssh_ed25519_generate,
	/* .copy_public = */	ssh_ed25519_copy_public,
	/* .sign = */		ssh_ed25519_sign,
	/* .verify = */		ssh_ed25519_verify,
};

const struct sshkey_impl sshkey_ed25519_impl = {
	/* .name = */		"ssh-ed25519",
	/* .shortname = */	"ED25519",
	/* .sigalg = */		NULL,
	/* .type = */		KEY_ED25519,
	/* .nid = */		0,
	/* .cert = */		0,
	/* .sigonly = */	0,
	/* .keybits = */	256,
	/* .funcs = */		&sshkey_ed25519_funcs,
};

const struct sshkey_impl sshkey_ed25519_cert_impl = {
	/* .name = */		"ssh-ed25519-cert-v01@openssh.com",
	/* .shortname = */	"ED25519-CERT",
	/* .sigalg = */		NULL,
	/* .type = */		KEY_ED25519_CERT,
	/* .nid = */		0,
	/* .cert = */		1,
	/* .sigonly = */	0,
	/* .keybits = */	256,
	/* .funcs = */		&sshkey_ed25519_funcs,
};
Commit	Line	Data
27267642	1	/* $OpenBSD: ssh-ed25519.c,v 1.19 2022/10/28 00:44:44 djm Exp $ */
5be9d9e3 DM	2	/*
	3	* Copyright (c) 2013 Markus Friedl <markus@openbsd.org>
	4	*
	5	* Permission to use, copy, modify, and distribute this software for any
	6	* purpose with or without fee is hereby granted, provided that the above
	7	* copyright notice and this permission notice appear in all copies.
	8	*
	9	* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
	10	* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	11	* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
	12	* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	13	* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
	14	* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
	15	* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
	16	*/
	17
f104da26 DM	18	#include "includes.h"
f104da26 DM	19
5be9d9e3	20	#include <sys/types.h>
8668706d	21	#include <limits.h>
5be9d9e3 DM	22
	23	#include "crypto_api.h"
	24
	25	#include <string.h>
	26	#include <stdarg.h>
	27
5be9d9e3	28	#include "log.h"
3c4726f4	29	#include "sshbuf.h"
8668706d DM	30	#define SSHKEY_INTERNAL
	31	#include "sshkey.h"
	32	#include "ssherr.h"
5be9d9e3 DM	33	#include "ssh.h"
5be9d9e3 DM	34
25de1c01	35	static void
	36	ssh_ed25519_cleanup(struct sshkey *k)
	37	{
	38	freezero(k->ed25519_pk, ED25519_PK_SZ);
	39	freezero(k->ed25519_sk, ED25519_SK_SZ);
	40	k->ed25519_pk = NULL;
	41	k->ed25519_sk = NULL;
	42	}
	43
1e78844a	44	static int
	45	ssh_ed25519_equal(const struct sshkey a, const struct sshkey b)
	46	{
	47	if (a->ed25519_pk == NULL \|\| b->ed25519_pk == NULL)
	48	return 0;
	49	if (memcmp(a->ed25519_pk, b->ed25519_pk, ED25519_PK_SZ) != 0)
	50	return 0;
	51	return 1;
	52	}
	53
591fed94	54	static int
591fed94	55	ssh_ed25519_serialize_public(const struct sshkey key, struct sshbuf b,
a1deb6cd	56	enum sshkey_serialize_rep opts)
591fed94	57	{
	58	int r;
	59
	60	if (key->ed25519_pk == NULL)
	61	return SSH_ERR_INVALID_ARGUMENT;
a1deb6cd	62	if ((r = sshbuf_put_string(b, key->ed25519_pk, ED25519_PK_SZ)) != 0)
591fed94	63	return r;
	64
	65	return 0;
	66	}
	67
2519a707	68	static int
	69	ssh_ed25519_serialize_private(const struct sshkey key, struct sshbuf b,
	70	enum sshkey_serialize_rep opts)
	71	{
	72	int r;
	73
	74	if ((r = sshbuf_put_string(b, key->ed25519_pk, ED25519_PK_SZ)) != 0 \|\|
	75	(r = sshbuf_put_string(b, key->ed25519_sk, ED25519_SK_SZ)) != 0)
	76	return r;
	77
	78	return 0;
	79	}
	80
262647c2	81	static int
	82	ssh_ed25519_generate(struct sshkey *k, int bits)
	83	{
	84	if ((k->ed25519_pk = malloc(ED25519_PK_SZ)) == NULL \|\|
	85	(k->ed25519_sk = malloc(ED25519_SK_SZ)) == NULL)
	86	return SSH_ERR_ALLOC_FAIL;
	87	crypto_sign_ed25519_keypair(k->ed25519_pk, k->ed25519_sk);
	88	return 0;
	89	}
	90
7d00799c	91	static int
	92	ssh_ed25519_copy_public(const struct sshkey from, struct sshkey to)
	93	{
	94	if (from->ed25519_pk == NULL)
	95	return 0; /* XXX SSH_ERR_INTERNAL_ERROR ? */
	96	if ((to->ed25519_pk = malloc(ED25519_PK_SZ)) == NULL)
	97	return SSH_ERR_ALLOC_FAIL;
	98	memcpy(to->ed25519_pk, from->ed25519_pk, ED25519_PK_SZ);
	99	return 0;
	100	}
	101
a1deb6cd	102	static int
	103	ssh_ed25519_deserialize_public(const char ktype, struct sshbuf b,
	104	struct sshkey *key)
	105	{
	106	u_char *pk = NULL;
	107	size_t len = 0;
	108	int r;
	109
	110	if ((r = sshbuf_get_string(b, &pk, &len)) != 0)
	111	return r;
	112	if (len != ED25519_PK_SZ) {
	113	freezero(pk, len);
	114	return SSH_ERR_INVALID_FORMAT;
	115	}
	116	key->ed25519_pk = pk;
	117	return 0;
	118	}
	119
27267642	120	static int
	121	ssh_ed25519_deserialize_private(const char ktype, struct sshbuf b,
	122	struct sshkey *key)
	123	{
	124	int r;
	125	size_t sklen = 0;
	126	u_char *ed25519_sk = NULL;
	127
	128	if ((r = ssh_ed25519_deserialize_public(NULL, b, key)) != 0)
	129	goto out;
	130	if ((r = sshbuf_get_string(b, &ed25519_sk, &sklen)) != 0)
	131	goto out;
	132	if (sklen != ED25519_SK_SZ) {
	133	r = SSH_ERR_INVALID_FORMAT;
	134	goto out;
	135	}
	136	key->ed25519_sk = ed25519_sk;
	137	ed25519_sk = NULL; /* transferred */
	138	/* success */
	139	r = 0;
	140	out:
	141	freezero(ed25519_sk, sklen);
	142	return r;
	143	}
	144
3fbc58bb	145	static int
	146	ssh_ed25519_sign(struct sshkey *key,
	147	u_char *sigp, size_t lenp,
	148	const u_char *data, size_t datalen,
	149	const char alg, const char sk_provider, const char *sk_pin, u_int compat)
5be9d9e3	150	{
8668706d DM	151	u_char *sig = NULL;
8668706d DM	152	size_t slen = 0, len;
5be9d9e3	153	unsigned long long smlen;
8668706d DM	154	int r, ret;
8668706d DM	155	struct sshbuf *b = NULL;
5be9d9e3	156
8668706d DM	157	if (lenp != NULL)
	158	*lenp = 0;
	159	if (sigp != NULL)
	160	*sigp = NULL;
bee3a234	161
8668706d DM	162	if (key == NULL \|\|
	163	sshkey_type_plain(key->type) != KEY_ED25519 \|\|
	164	key->ed25519_sk == NULL \|\|
	165	datalen >= INT_MAX - crypto_sign_ed25519_BYTES)
	166	return SSH_ERR_INVALID_ARGUMENT;
5be9d9e3	167	smlen = slen = datalen + crypto_sign_ed25519_BYTES;
8668706d DM	168	if ((sig = malloc(slen)) == NULL)
8668706d DM	169	return SSH_ERR_ALLOC_FAIL;
5be9d9e3 DM	170
	171	if ((ret = crypto_sign_ed25519(sig, &smlen, data, datalen,
	172	key->ed25519_sk)) != 0 \|\| smlen <= datalen) {
8668706d DM	173	r = SSH_ERR_INVALID_ARGUMENT; /* XXX better error? */
8668706d DM	174	goto out;
5be9d9e3 DM	175	}
5be9d9e3 DM	176	/* encode signature */
8668706d DM	177	if ((b = sshbuf_new()) == NULL) {
	178	r = SSH_ERR_ALLOC_FAIL;
	179	goto out;
	180	}
	181	if ((r = sshbuf_put_cstring(b, "ssh-ed25519")) != 0 \|\|
	182	(r = sshbuf_put_string(b, sig, smlen - datalen)) != 0)
	183	goto out;
	184	len = sshbuf_len(b);
	185	if (sigp != NULL) {
	186	if ((*sigp = malloc(len)) == NULL) {
	187	r = SSH_ERR_ALLOC_FAIL;
	188	goto out;
	189	}
	190	memcpy(*sigp, sshbuf_ptr(b), len);
	191	}
5be9d9e3 DM	192	if (lenp != NULL)
5be9d9e3 DM	193	*lenp = len;
8668706d DM	194	/* success */
	195	r = 0;
	196	out:
	197	sshbuf_free(b);
70a5de0a	198	if (sig != NULL)
d5ba1c03	199	freezero(sig, slen);
5be9d9e3	200
8668706d	201	return r;
5be9d9e3 DM	202	}
5be9d9e3 DM	203
3fbc58bb	204	static int
8668706d	205	ssh_ed25519_verify(const struct sshkey *key,
3fbc58bb	206	const u_char *sig, size_t siglen,
	207	const u_char data, size_t dlen, const char alg, u_int compat,
	208	struct sshkey_sig_details **detailsp)
5be9d9e3	209	{
8668706d DM	210	struct sshbuf *b = NULL;
	211	char *ktype = NULL;
	212	const u_char *sigblob;
	213	u_char sm = NULL, m = NULL;
	214	size_t len;
	215	unsigned long long smlen = 0, mlen = 0;
	216	int r, ret;
5be9d9e3	217
8668706d DM	218	if (key == NULL \|\|
	219	sshkey_type_plain(key->type) != KEY_ED25519 \|\|
	220	key->ed25519_pk == NULL \|\|
3fbc58bb	221	dlen >= INT_MAX - crypto_sign_ed25519_BYTES \|\|
3fbc58bb	222	sig == NULL \|\| siglen == 0)
8668706d DM	223	return SSH_ERR_INVALID_ARGUMENT;
8668706d DM	224
3fbc58bb	225	if ((b = sshbuf_from(sig, siglen)) == NULL)
8668706d DM	226	return SSH_ERR_ALLOC_FAIL;
	227	if ((r = sshbuf_get_cstring(b, &ktype, NULL)) != 0 \|\|
	228	(r = sshbuf_get_string_direct(b, &sigblob, &len)) != 0)
	229	goto out;
5be9d9e3	230	if (strcmp("ssh-ed25519", ktype) != 0) {
8668706d DM	231	r = SSH_ERR_KEY_TYPE_MISMATCH;
8668706d DM	232	goto out;
5be9d9e3	233	}
8668706d DM	234	if (sshbuf_len(b) != 0) {
	235	r = SSH_ERR_UNEXPECTED_TRAILING_DATA;
	236	goto out;
5be9d9e3 DM	237	}
5be9d9e3 DM	238	if (len > crypto_sign_ed25519_BYTES) {
8668706d DM	239	r = SSH_ERR_INVALID_FORMAT;
8668706d DM	240	goto out;
5be9d9e3	241	}
3fbc58bb	242	if (dlen >= SIZE_MAX - len) {
165bc878	243	r = SSH_ERR_INVALID_ARGUMENT;
	244	goto out;
	245	}
3fbc58bb	246	smlen = len + dlen;
8668706d	247	mlen = smlen;
3c4726f4	248	if ((sm = malloc(smlen)) == NULL \|\| (m = malloc(mlen)) == NULL) {
8668706d DM	249	r = SSH_ERR_ALLOC_FAIL;
	250	goto out;
	251	}
5be9d9e3	252	memcpy(sm, sigblob, len);
3fbc58bb	253	memcpy(sm+len, data, dlen);
5be9d9e3 DM	254	if ((ret = crypto_sign_ed25519_open(m, &mlen, sm, smlen,
5be9d9e3 DM	255	key->ed25519_pk)) != 0) {
816036f1	256	debug2_f("crypto_sign_ed25519_open failed: %d", ret);
5be9d9e3	257	}
3fbc58bb	258	if (ret != 0 \|\| mlen != dlen) {
8668706d DM	259	r = SSH_ERR_SIGNATURE_INVALID;
8668706d DM	260	goto out;
5be9d9e3 DM	261	}
5be9d9e3 DM	262	/* XXX compare 'm' and 'data' ? */
8668706d DM	263	/* success */
	264	r = 0;
	265	out:
70a5de0a	266	if (sm != NULL)
d5ba1c03	267	freezero(sm, smlen);
70a5de0a	268	if (m != NULL)
d5ba1c03	269	freezero(m, smlen); /* NB mlen may be invalid if r != 0 */
8668706d DM	270	sshbuf_free(b);
	271	free(ktype);
	272	return r;
5be9d9e3	273	}
25de1c01	274
1e78844a	275	/* NB. not static; used by ED25519-SK */
1e78844a	276	const struct sshkey_impl_funcs sshkey_ed25519_funcs = {
25de1c01	277	/* .size = */ NULL,
	278	/* .alloc = */ NULL,
	279	/* .cleanup = */ ssh_ed25519_cleanup,
1e78844a	280	/* .equal = */ ssh_ed25519_equal,
591fed94	281	/* .ssh_serialize_public = */ ssh_ed25519_serialize_public,
a1deb6cd	282	/* .ssh_deserialize_public = */ ssh_ed25519_deserialize_public,
2519a707	283	/* .ssh_serialize_private = */ ssh_ed25519_serialize_private,
27267642	284	/* .ssh_deserialize_private = */ ssh_ed25519_deserialize_private,
262647c2	285	/* .generate = */ ssh_ed25519_generate,
7d00799c	286	/* .copy_public = */ ssh_ed25519_copy_public,
3fbc58bb	287	/* .sign = */ ssh_ed25519_sign,
3fbc58bb	288	/* .verify = */ ssh_ed25519_verify,
25de1c01	289	};
	290
	291	const struct sshkey_impl sshkey_ed25519_impl = {
	292	/* .name = */ "ssh-ed25519",
	293	/* .shortname = */ "ED25519",
	294	/* .sigalg = */ NULL,
	295	/* .type = */ KEY_ED25519,
	296	/* .nid = */ 0,
	297	/* .cert = */ 0,
	298	/* .sigonly = */ 0,
	299	/* .keybits = */ 256,
	300	/* .funcs = */ &sshkey_ed25519_funcs,
	301	};
	302
	303	const struct sshkey_impl sshkey_ed25519_cert_impl = {
	304	/* .name = */ "ssh-ed25519-cert-v01@openssh.com",
	305	/* .shortname = */ "ED25519-CERT",
	306	/* .sigalg = */ NULL,
	307	/* .type = */ KEY_ED25519_CERT,
	308	/* .nid = */ 0,
	309	/* .cert = */ 1,
	310	/* .sigonly = */ 0,
	311	/* .keybits = */ 256,
	312	/* .funcs = */ &sshkey_ed25519_funcs,
	313	};