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upstream: implement sshsk_ed25519_assemble(); ok djm 

OpenBSD-Commit-ID: af9ec838b9bc643786310b5caefc4ca4754e68c6
This commit is contained in:
markus@openbsd.org 2019-11-12 19:31:45 +00:00 committed by Damien Miller
parent fe05a36dc0
commit 7c32b51edb
2 changed files with 58 additions and 8 deletions
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58
ssh-sk.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: ssh-sk.c,v 1.5 2019/11/12 19:31:18 markus Exp $ */
/* $OpenBSD: ssh-sk.c,v 1.6 2019/11/12 19:31:45 markus Exp $ */
/*
* Copyright (c) 2019 Google LLC
*
@ -39,6 +39,7 @@
#include "ssh-sk.h"
#include "sk-api.h"
#include "crypto_api.h"
struct sshsk_provider {
char *path;
@ -198,8 +199,40 @@ sshsk_ecdsa_assemble(struct sk_enroll_response *resp, struct sshkey **keyp)
return r;
}
static int
sshsk_ed25519_assemble(struct sk_enroll_response *resp, struct sshkey **keyp)
{
struct sshkey *key = NULL;
int r;
*keyp = NULL;
if (resp->public_key_len != ED25519_PK_SZ) {
error("%s: invalid size: %zu", __func__, resp->public_key_len);
r = SSH_ERR_INVALID_FORMAT;
goto out;
}
if ((key = sshkey_new(KEY_ED25519_SK)) == NULL) {
error("%s: sshkey_new failed", __func__);
r = SSH_ERR_ALLOC_FAIL;
goto out;
}
if ((key->ed25519_pk = malloc(ED25519_PK_SZ)) == NULL) {
error("%s: malloc failed", __func__);
r = SSH_ERR_ALLOC_FAIL;
goto out;
}
memcpy(key->ed25519_pk, resp->public_key, ED25519_PK_SZ);
/* success */
*keyp = key;
key = NULL; /* transferred */
r = 0;
out:
sshkey_free(key);
return r;
}
int
sshsk_enroll(const char *provider_path, const char *application,
sshsk_enroll(int type, const char *provider_path, const char *application,
uint8_t flags, struct sshbuf *challenge_buf, struct sshkey **keyp,
struct sshbuf *attest)
{
@ -214,6 +247,15 @@ sshsk_enroll(const char *provider_path, const char *application,
*keyp = NULL;
if (attest)
sshbuf_reset(attest);
switch (type) {
case KEY_ECDSA_SK:
case KEY_ED25519_SK:
break;
default:
error("%s: unsupported key type", __func__);
r = SSH_ERR_INVALID_ARGUMENT;
goto out;
}
if (provider_path == NULL) {
error("%s: missing provider", __func__);
r = SSH_ERR_INVALID_ARGUMENT;
@ -259,8 +301,16 @@ sshsk_enroll(const char *provider_path, const char *application,
r = SSH_ERR_INVALID_FORMAT;
goto out;
}
if ((r = sshsk_ecdsa_assemble(resp, &key)) != 0)
goto out;
switch (type) {
case KEY_ECDSA_SK:
if ((r = sshsk_ecdsa_assemble(resp, &key)) != 0)
goto out;
break;
case KEY_ED25519_SK:
if ((r = sshsk_ed25519_assemble(resp, &key)) != 0)
goto out;
break;
}
key->sk_flags = flags;
if ((key->sk_key_handle = sshbuf_new()) == NULL ||
(key->sk_reserved = sshbuf_new()) == NULL) {

8
ssh-sk.h
View File

@ -1,4 +1,4 @@
/* $OpenBSD: ssh-sk.h,v 1.4 2019/11/12 19:31:18 markus Exp $ */
/* $OpenBSD: ssh-sk.h,v 1.5 2019/11/12 19:31:45 markus Exp $ */
/*
* Copyright (c) 2019 Google LLC
*
@ -25,8 +25,8 @@ struct sshkey;
#define SSH_SK_HELPER_VERSION 1
/*
* Enroll (generate) a new security-key hosted private key via the specified
* provider middleware.
* Enroll (generate) a new security-key hosted private key of given type
* via the specified provider middleware.
* If challenge_buf is NULL then a random 256 bit challenge will be used.
*
* Returns 0 on success or a ssherr.h error code on failure.
@ -34,7 +34,7 @@ struct sshkey;
* If successful and the attest_data buffer is not NULL then attestation
* information is placed there.
*/
int sshsk_enroll(const char *provider_path, const char *application,
int sshsk_enroll(int type, const char *provider_path, const char *application,
uint8_t flags, struct sshbuf *challenge_buf, struct sshkey **keyp,
struct sshbuf *attest);