зеркало из https://github.com/Azure/sonic-openssh.git
upstream: Initial infrastructure for U2F/FIDO support
Key library support: including allocation, marshalling public/private keys and certificates, signature validation. feedback & ok markus@ OpenBSD-Commit-ID: a17615ba15e0f7932ac4360cb18fc9a9544e68c7
This commit is contained in:
djm@openbsd.org
Damien Miller
Родитель
57ecc10628
Коммит
02bb0768a9
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@ -91,7 +91,8 @@ LIBSSH_OBJS=${LIBOPENSSH_OBJS} \
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log.o match.o moduli.o nchan.o packet.o \
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readpass.o ttymodes.o xmalloc.o addrmatch.o \
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atomicio.o dispatch.o mac.o misc.o utf8.o \
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monitor_fdpass.o rijndael.o ssh-dss.o ssh-ecdsa.o ssh-rsa.o dh.o \
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monitor_fdpass.o rijndael.o ssh-dss.o ssh-ecdsa.o ssh-ecdsa-sk.o \
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ssh-rsa.o dh.o \
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msg.o progressmeter.o dns.o entropy.o gss-genr.o umac.o umac128.o \
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ssh-pkcs11.o smult_curve25519_ref.o \
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poly1305.o chacha.o cipher-chachapoly.o \
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@ -1,4 +1,4 @@
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/* $OpenBSD: pathnames.h,v 1.28 2018/02/23 15:58:37 markus Exp $ */
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/* $OpenBSD: pathnames.h,v 1.29 2019/10/31 21:15:14 djm Exp $ */
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/*
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* Author: Tatu Ylonen <ylo@cs.hut.fi>
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@ -77,6 +77,7 @@
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#define _PATH_SSH_CLIENT_ID_RSA _PATH_SSH_USER_DIR "/id_rsa"
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#define _PATH_SSH_CLIENT_ID_ED25519 _PATH_SSH_USER_DIR "/id_ed25519"
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#define _PATH_SSH_CLIENT_ID_XMSS _PATH_SSH_USER_DIR "/id_xmss"
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#define _PATH_SSH_CLIENT_ID_ECDSA_SK _PATH_SSH_USER_DIR "/id_ecdsa_sk"
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/*
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* Configuration file in user's home directory. This file need not be
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@ -0,0 +1,180 @@
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/* $OpenBSD: ssh-ecdsa-sk.c,v 1.1 2019/10/31 21:15:14 djm Exp $ */
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/*
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* Copyright (c) 2000 Markus Friedl. All rights reserved.
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* Copyright (c) 2010 Damien Miller. All rights reserved.
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* Copyright (c) 2019 Google Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/* #define DEBUG_SK 1 */
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#include "includes.h"
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#include <sys/types.h>
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#include <openssl/bn.h>
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#include <openssl/ec.h>
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#include <openssl/ecdsa.h>
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#include <openssl/evp.h>
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#include <string.h>
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#include <stdio.h> /* needed for DEBUG_SK only */
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#include "sshbuf.h"
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#include "ssherr.h"
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#include "digest.h"
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#define SSHKEY_INTERNAL
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#include "sshkey.h"
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/* ARGSUSED */
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int
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ssh_ecdsa_sk_verify(const struct sshkey *key,
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const u_char *signature, size_t signaturelen,
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const u_char *data, size_t datalen, u_int compat)
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{
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ECDSA_SIG *sig = NULL;
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BIGNUM *sig_r = NULL, *sig_s = NULL;
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u_char sig_flags;
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u_char msghash[32], apphash[32], sighash[32];
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u_int sig_counter;
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int ret = SSH_ERR_INTERNAL_ERROR;
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struct sshbuf *b = NULL, *sigbuf = NULL, *original_signed = NULL;
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char *ktype = NULL;
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#ifdef DEBUG_SK
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char *tmp = NULL;
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#endif
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if (key == NULL || key->ecdsa == NULL ||
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sshkey_type_plain(key->type) != KEY_ECDSA_SK ||
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signature == NULL || signaturelen == 0)
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return SSH_ERR_INVALID_ARGUMENT;
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if (key->ecdsa_nid != NID_X9_62_prime256v1)
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return SSH_ERR_INTERNAL_ERROR;
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/* fetch signature */
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if ((b = sshbuf_from(signature, signaturelen)) == NULL)
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return SSH_ERR_ALLOC_FAIL;
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if (sshbuf_get_cstring(b, &ktype, NULL) != 0 ||
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sshbuf_froms(b, &sigbuf) != 0) {
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ret = SSH_ERR_INVALID_FORMAT;
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goto out;
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}
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if (strcmp(sshkey_ssh_name_plain(key), ktype) != 0) {
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ret = SSH_ERR_KEY_TYPE_MISMATCH;
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goto out;
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}
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if (sshbuf_len(b) != 0) {
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ret = SSH_ERR_UNEXPECTED_TRAILING_DATA;
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goto out;
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}
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/* parse signature */
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if (sshbuf_get_bignum2(sigbuf, &sig_r) != 0 ||
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sshbuf_get_bignum2(sigbuf, &sig_s) != 0 ||
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sshbuf_get_u8(sigbuf, &sig_flags) != 0 ||
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sshbuf_get_u32(sigbuf, &sig_counter) != 0) {
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ret = SSH_ERR_INVALID_FORMAT;
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goto out;
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}
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if ((sig = ECDSA_SIG_new()) == NULL) {
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ret = SSH_ERR_ALLOC_FAIL;
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goto out;
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}
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if (!ECDSA_SIG_set0(sig, sig_r, sig_s)) {
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ret = SSH_ERR_LIBCRYPTO_ERROR;
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goto out;
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}
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#ifdef DEBUG_SK
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fprintf(stderr, "%s: sig_r: %s\n", __func__, (tmp = BN_bn2hex(sig_r)));
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free(tmp);
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fprintf(stderr, "%s: sig_s: %s\n", __func__, (tmp = BN_bn2hex(sig_s)));
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free(tmp);
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fprintf(stderr, "%s: sig_flags = 0x%02x, sig_counter = %u\n",
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__func__, sig_flags, sig_counter);
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#endif
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sig_r = sig_s = NULL; /* transferred */
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if (sshbuf_len(sigbuf) != 0) {
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ret = SSH_ERR_UNEXPECTED_TRAILING_DATA;
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goto out;
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}
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/* Reconstruct data that was supposedly signed */
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if ((original_signed = sshbuf_new()) == NULL)
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return SSH_ERR_ALLOC_FAIL;
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if ((ret = ssh_digest_memory(SSH_DIGEST_SHA256, data, datalen,
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msghash, sizeof(msghash))) != 0)
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goto out;
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/* Application value is hashed before signature */
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if ((ret = ssh_digest_memory(SSH_DIGEST_SHA256, key->sk_application,
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strlen(key->sk_application), apphash, sizeof(apphash))) != 0)
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goto out;
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#ifdef DEBUG_SK
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fprintf(stderr, "%s: hashed message:\n", __func__);
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sshbuf_dump_data(msghash, sizeof(msghash), stderr);
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#endif
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if ((ret = sshbuf_put(original_signed,
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apphash, sizeof(apphash))) != 0 ||
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(ret = sshbuf_put_u8(original_signed, sig_flags)) != 0 ||
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(ret = sshbuf_put_u32(original_signed, sig_counter)) != 0 ||
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(ret = sshbuf_put(original_signed, msghash, sizeof(msghash))) != 0)
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goto out;
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/* Signature is over H(original_signed) */
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if ((ret = ssh_digest_buffer(SSH_DIGEST_SHA256, original_signed,
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sighash, sizeof(sighash))) != 0)
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goto out;
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#ifdef DEBUG_SK
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fprintf(stderr, "%s: signed buf:\n", __func__);
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sshbuf_dump(original_signed, stderr);
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fprintf(stderr, "%s: signed hash:\n", __func__);
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sshbuf_dump_data(sighash, sizeof(sighash), stderr);
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#endif
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/* Verify it */
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switch (ECDSA_do_verify(sighash, sizeof(sighash), sig, key->ecdsa)) {
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case 1:
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ret = 0;
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break;
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case 0:
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ret = SSH_ERR_SIGNATURE_INVALID;
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goto out;
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default:
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ret = SSH_ERR_LIBCRYPTO_ERROR;
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goto out;
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}
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out:
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explicit_bzero(&sig_flags, sizeof(sig_flags));
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explicit_bzero(&sig_counter, sizeof(sig_counter));
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explicit_bzero(msghash, sizeof(msghash));
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explicit_bzero(sighash, sizeof(msghash));
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explicit_bzero(apphash, sizeof(apphash));
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sshbuf_free(original_signed);
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sshbuf_free(sigbuf);
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sshbuf_free(b);
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ECDSA_SIG_free(sig);
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BN_clear_free(sig_r);
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BN_clear_free(sig_s);
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free(ktype);
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return ret;
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}
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205
sshkey.c
205
sshkey.c
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@ -1,4 +1,4 @@
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/* $OpenBSD: sshkey.c,v 1.84 2019/10/09 00:04:42 djm Exp $ */
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/* $OpenBSD: sshkey.c,v 1.85 2019/10/31 21:15:14 djm Exp $ */
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/*
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* Copyright (c) 2000, 2001 Markus Friedl. All rights reserved.
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* Copyright (c) 2008 Alexander von Gernler. All rights reserved.
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@ -125,6 +125,8 @@ static const struct keytype keytypes[] = {
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{ "ecdsa-sha2-nistp521", "ECDSA", NULL,
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KEY_ECDSA, NID_secp521r1, 0, 0 },
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# endif /* OPENSSL_HAS_NISTP521 */
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{ "sk-ecdsa-sha2-nistp256@openssh.com", "ECDSA-SK", NULL,
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KEY_ECDSA_SK, NID_X9_62_prime256v1, 0, 0 },
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# endif /* OPENSSL_HAS_ECC */
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{ "ssh-rsa-cert-v01@openssh.com", "RSA-CERT", NULL,
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KEY_RSA_CERT, 0, 1, 0 },
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@ -143,6 +145,8 @@ static const struct keytype keytypes[] = {
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{ "ecdsa-sha2-nistp521-cert-v01@openssh.com", "ECDSA-CERT", NULL,
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KEY_ECDSA_CERT, NID_secp521r1, 1, 0 },
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# endif /* OPENSSL_HAS_NISTP521 */
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{ "sk-ecdsa-sha2-nistp256-cert-v01@openssh.com", "ECDSA-SK-CERT", NULL,
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KEY_ECDSA_SK_CERT, NID_X9_62_prime256v1, 1, 0 },
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# endif /* OPENSSL_HAS_ECC */
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#endif /* WITH_OPENSSL */
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{ NULL, NULL, NULL, -1, -1, 0, 0 }
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|
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@ -211,13 +215,26 @@ sshkey_type_from_name(const char *name)
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return KEY_UNSPEC;
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}
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static int
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key_type_is_ecdsa_variant(int type)
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{
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switch (type) {
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case KEY_ECDSA:
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case KEY_ECDSA_CERT:
|
||||
case KEY_ECDSA_SK:
|
||||
case KEY_ECDSA_SK_CERT:
|
||||
return 1;
|
||||
}
|
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return 0;
|
||||
}
|
||||
|
||||
int
|
||||
sshkey_ecdsa_nid_from_name(const char *name)
|
||||
{
|
||||
const struct keytype *kt;
|
||||
|
||||
for (kt = keytypes; kt->type != -1; kt++) {
|
||||
if (kt->type != KEY_ECDSA && kt->type != KEY_ECDSA_CERT)
|
||||
if (!key_type_is_ecdsa_variant(kt->type))
|
||||
continue;
|
||||
if (kt->name != NULL && strcmp(name, kt->name) == 0)
|
||||
return kt->nid;
|
||||
|
|
@ -313,6 +330,8 @@ sshkey_size(const struct sshkey *k)
|
|||
return BN_num_bits(dsa_p);
|
||||
case KEY_ECDSA:
|
||||
case KEY_ECDSA_CERT:
|
||||
case KEY_ECDSA_SK:
|
||||
case KEY_ECDSA_SK_CERT:
|
||||
return sshkey_curve_nid_to_bits(k->ecdsa_nid);
|
||||
#endif /* WITH_OPENSSL */
|
||||
case KEY_ED25519:
|
||||
|
|
@ -331,6 +350,7 @@ sshkey_type_is_valid_ca(int type)
|
|||
case KEY_RSA:
|
||||
case KEY_DSA:
|
||||
case KEY_ECDSA:
|
||||
case KEY_ECDSA_SK:
|
||||
case KEY_ED25519:
|
||||
case KEY_XMSS:
|
||||
return 1;
|
||||
|
|
@ -358,6 +378,8 @@ sshkey_type_plain(int type)
|
|||
return KEY_DSA;
|
||||
case KEY_ECDSA_CERT:
|
||||
return KEY_ECDSA;
|
||||
case KEY_ECDSA_SK_CERT:
|
||||
return KEY_ECDSA_SK;
|
||||
case KEY_ED25519_CERT:
|
||||
return KEY_ED25519;
|
||||
case KEY_XMSS_CERT:
|
||||
|
|
@ -533,6 +555,8 @@ sshkey_new(int type)
|
|||
break;
|
||||
case KEY_ECDSA:
|
||||
case KEY_ECDSA_CERT:
|
||||
case KEY_ECDSA_SK:
|
||||
case KEY_ECDSA_SK_CERT:
|
||||
/* Cannot do anything until we know the group */
|
||||
break;
|
||||
#endif /* WITH_OPENSSL */
|
||||
|
|
@ -577,6 +601,12 @@ sshkey_free(struct sshkey *k)
|
|||
k->dsa = NULL;
|
||||
break;
|
||||
# ifdef OPENSSL_HAS_ECC
|
||||
case KEY_ECDSA_SK:
|
||||
case KEY_ECDSA_SK_CERT:
|
||||
free(k->sk_application);
|
||||
sshbuf_free(k->sk_key_handle);
|
||||
sshbuf_free(k->sk_reserved);
|
||||
/* FALLTHROUGH */
|
||||
case KEY_ECDSA:
|
||||
case KEY_ECDSA_CERT:
|
||||
EC_KEY_free(k->ecdsa);
|
||||
|
|
@ -676,6 +706,13 @@ sshkey_equal_public(const struct sshkey *a, const struct sshkey *b)
|
|||
BN_cmp(dsa_g_a, dsa_g_b) == 0 &&
|
||||
BN_cmp(dsa_pub_key_a, dsa_pub_key_b) == 0;
|
||||
# ifdef OPENSSL_HAS_ECC
|
||||
case KEY_ECDSA_SK:
|
||||
case KEY_ECDSA_SK_CERT:
|
||||
if (a->sk_application == NULL || b->sk_application == NULL)
|
||||
return 0;
|
||||
if (strcmp(a->sk_application, b->sk_application) != 0)
|
||||
return 0;
|
||||
/* FALLTHROUGH */
|
||||
case KEY_ECDSA_CERT:
|
||||
case KEY_ECDSA:
|
||||
if (a->ecdsa == NULL || b->ecdsa == NULL ||
|
||||
|
|
@ -751,6 +788,7 @@ to_blob_buf(const struct sshkey *key, struct sshbuf *b, int force_plain,
|
|||
#ifdef WITH_OPENSSL
|
||||
case KEY_DSA_CERT:
|
||||
case KEY_ECDSA_CERT:
|
||||
case KEY_ECDSA_SK_CERT:
|
||||
case KEY_RSA_CERT:
|
||||
#endif /* WITH_OPENSSL */
|
||||
case KEY_ED25519_CERT:
|
||||
|
|
@ -777,6 +815,7 @@ to_blob_buf(const struct sshkey *key, struct sshbuf *b, int force_plain,
|
|||
break;
|
||||
# ifdef OPENSSL_HAS_ECC
|
||||
case KEY_ECDSA:
|
||||
case KEY_ECDSA_SK:
|
||||
if (key->ecdsa == NULL)
|
||||
return SSH_ERR_INVALID_ARGUMENT;
|
||||
if ((ret = sshbuf_put_cstring(b, typename)) != 0 ||
|
||||
|
|
@ -784,6 +823,11 @@ to_blob_buf(const struct sshkey *key, struct sshbuf *b, int force_plain,
|
|||
sshkey_curve_nid_to_name(key->ecdsa_nid))) != 0 ||
|
||||
(ret = sshbuf_put_eckey(b, key->ecdsa)) != 0)
|
||||
return ret;
|
||||
if (type == KEY_ECDSA_SK) {
|
||||
if ((ret = sshbuf_put_cstring(b,
|
||||
key->sk_application)) != 0)
|
||||
return ret;
|
||||
}
|
||||
break;
|
||||
# endif
|
||||
case KEY_RSA:
|
||||
|
|
@ -1217,7 +1261,7 @@ peek_type_nid(const char *s, size_t l, int *nid)
|
|||
continue;
|
||||
if (memcmp(s, kt->name, l) == 0) {
|
||||
*nid = -1;
|
||||
if (kt->type == KEY_ECDSA || kt->type == KEY_ECDSA_CERT)
|
||||
if (key_type_is_ecdsa_variant(kt->type))
|
||||
*nid = kt->nid;
|
||||
return kt->type;
|
||||
}
|
||||
|
|
@ -1243,9 +1287,11 @@ sshkey_read(struct sshkey *ret, char **cpp)
|
|||
case KEY_RSA:
|
||||
case KEY_DSA:
|
||||
case KEY_ECDSA:
|
||||
case KEY_ECDSA_SK:
|
||||
case KEY_ED25519:
|
||||
case KEY_DSA_CERT:
|
||||
case KEY_ECDSA_CERT:
|
||||
case KEY_ECDSA_SK_CERT:
|
||||
case KEY_RSA_CERT:
|
||||
case KEY_ED25519_CERT:
|
||||
#ifdef WITH_XMSS
|
||||
|
|
@ -1302,7 +1348,7 @@ sshkey_read(struct sshkey *ret, char **cpp)
|
|||
sshkey_free(k);
|
||||
return SSH_ERR_KEY_TYPE_MISMATCH;
|
||||
}
|
||||
if (sshkey_type_plain(type) == KEY_ECDSA && curve_nid != k->ecdsa_nid) {
|
||||
if (key_type_is_ecdsa_variant(type) && curve_nid != k->ecdsa_nid) {
|
||||
sshkey_free(k);
|
||||
return SSH_ERR_EC_CURVE_MISMATCH;
|
||||
}
|
||||
|
|
@ -1346,6 +1392,19 @@ sshkey_read(struct sshkey *ret, char **cpp)
|
|||
k->ecdsa_nid = -1;
|
||||
#ifdef DEBUG_PK
|
||||
sshkey_dump_ec_key(ret->ecdsa);
|
||||
#endif
|
||||
break;
|
||||
case KEY_ECDSA_SK:
|
||||
EC_KEY_free(ret->ecdsa);
|
||||
ret->ecdsa = k->ecdsa;
|
||||
ret->ecdsa_nid = k->ecdsa_nid;
|
||||
ret->sk_application = k->sk_application;
|
||||
k->ecdsa = NULL;
|
||||
k->ecdsa_nid = -1;
|
||||
k->sk_application = NULL;
|
||||
#ifdef DEBUG_PK
|
||||
sshkey_dump_ec_key(ret->ecdsa);
|
||||
fprintf(stderr, "App: %s\n", ret->sk_application);
|
||||
#endif
|
||||
break;
|
||||
# endif /* OPENSSL_HAS_ECC */
|
||||
|
|
@ -1747,15 +1806,14 @@ sshkey_from_private(const struct sshkey *k, struct sshkey **pkp)
|
|||
#endif /* WITH_OPENSSL */
|
||||
|
||||
*pkp = NULL;
|
||||
if ((n = sshkey_new(k->type)) == NULL) {
|
||||
r = SSH_ERR_ALLOC_FAIL;
|
||||
goto out;
|
||||
}
|
||||
switch (k->type) {
|
||||
#ifdef WITH_OPENSSL
|
||||
case KEY_DSA:
|
||||
case KEY_DSA_CERT:
|
||||
if ((n = sshkey_new(k->type)) == NULL) {
|
||||
r = SSH_ERR_ALLOC_FAIL;
|
||||
goto out;
|
||||
}
|
||||
|
||||
DSA_get0_pqg(k->dsa, &dsa_p, &dsa_q, &dsa_g);
|
||||
DSA_get0_key(k->dsa, &dsa_pub_key, NULL);
|
||||
if ((dsa_p_dup = BN_dup(dsa_p)) == NULL ||
|
||||
|
|
@ -1780,10 +1838,8 @@ sshkey_from_private(const struct sshkey *k, struct sshkey **pkp)
|
|||
# ifdef OPENSSL_HAS_ECC
|
||||
case KEY_ECDSA:
|
||||
case KEY_ECDSA_CERT:
|
||||
if ((n = sshkey_new(k->type)) == NULL) {
|
||||
r = SSH_ERR_ALLOC_FAIL;
|
||||
goto out;
|
||||
}
|
||||
case KEY_ECDSA_SK:
|
||||
case KEY_ECDSA_SK_CERT:
|
||||
n->ecdsa_nid = k->ecdsa_nid;
|
||||
n->ecdsa = EC_KEY_new_by_curve_name(k->ecdsa_nid);
|
||||
if (n->ecdsa == NULL) {
|
||||
|
|
@ -1795,14 +1851,15 @@ sshkey_from_private(const struct sshkey *k, struct sshkey **pkp)
|
|||
r = SSH_ERR_LIBCRYPTO_ERROR;
|
||||
goto out;
|
||||
}
|
||||
if (k->type != KEY_ECDSA_SK && k->type != KEY_ECDSA_SK_CERT)
|
||||
break;
|
||||
/* Append security-key application string */
|
||||
if ((n->sk_application = strdup(k->sk_application)) == NULL)
|
||||
goto out;
|
||||
break;
|
||||
# endif /* OPENSSL_HAS_ECC */
|
||||
case KEY_RSA:
|
||||
case KEY_RSA_CERT:
|
||||
if ((n = sshkey_new(k->type)) == NULL) {
|
||||
r = SSH_ERR_ALLOC_FAIL;
|
||||
goto out;
|
||||
}
|
||||
RSA_get0_key(k->rsa, &rsa_n, &rsa_e, NULL);
|
||||
if ((rsa_n_dup = BN_dup(rsa_n)) == NULL ||
|
||||
(rsa_e_dup = BN_dup(rsa_e)) == NULL) {
|
||||
|
|
@ -1818,10 +1875,6 @@ sshkey_from_private(const struct sshkey *k, struct sshkey **pkp)
|
|||
#endif /* WITH_OPENSSL */
|
||||
case KEY_ED25519:
|
||||
case KEY_ED25519_CERT:
|
||||
if ((n = sshkey_new(k->type)) == NULL) {
|
||||
r = SSH_ERR_ALLOC_FAIL;
|
||||
goto out;
|
||||
}
|
||||
if (k->ed25519_pk != NULL) {
|
||||
if ((n->ed25519_pk = malloc(ED25519_PK_SZ)) == NULL) {
|
||||
r = SSH_ERR_ALLOC_FAIL;
|
||||
|
|
@ -1833,10 +1886,6 @@ sshkey_from_private(const struct sshkey *k, struct sshkey **pkp)
|
|||
#ifdef WITH_XMSS
|
||||
case KEY_XMSS:
|
||||
case KEY_XMSS_CERT:
|
||||
if ((n = sshkey_new(k->type)) == NULL) {
|
||||
r = SSH_ERR_ALLOC_FAIL;
|
||||
goto out;
|
||||
}
|
||||
if ((r = sshkey_xmss_init(n, k->xmss_name)) != 0)
|
||||
goto out;
|
||||
if (k->xmss_pk != NULL) {
|
||||
|
|
@ -2329,6 +2378,7 @@ sshkey_from_blob_internal(struct sshbuf *b, struct sshkey **keyp,
|
|||
#endif
|
||||
break;
|
||||
case KEY_ECDSA_CERT:
|
||||
case KEY_ECDSA_SK_CERT:
|
||||
/* Skip nonce */
|
||||
if (sshbuf_get_string_direct(b, NULL, NULL) != 0) {
|
||||
ret = SSH_ERR_INVALID_FORMAT;
|
||||
|
|
@ -2337,6 +2387,7 @@ sshkey_from_blob_internal(struct sshbuf *b, struct sshkey **keyp,
|
|||
/* FALLTHROUGH */
|
||||
# ifdef OPENSSL_HAS_ECC
|
||||
case KEY_ECDSA:
|
||||
case KEY_ECDSA_SK:
|
||||
if ((key = sshkey_new(type)) == NULL) {
|
||||
ret = SSH_ERR_ALLOC_FAIL;
|
||||
goto out;
|
||||
|
|
@ -2377,6 +2428,17 @@ sshkey_from_blob_internal(struct sshbuf *b, struct sshkey **keyp,
|
|||
#ifdef DEBUG_PK
|
||||
sshkey_dump_ec_point(EC_KEY_get0_group(key->ecdsa), q);
|
||||
#endif
|
||||
if (type == KEY_ECDSA_SK || type == KEY_ECDSA_SK_CERT) {
|
||||
/* Parse additional security-key application string */
|
||||
if (sshbuf_get_cstring(b, &key->sk_application,
|
||||
NULL) != 0) {
|
||||
ret = SSH_ERR_INVALID_FORMAT;
|
||||
goto out;
|
||||
}
|
||||
#ifdef DEBUG_PK
|
||||
fprintf(stderr, "App: %s\n", key->sk_application);
|
||||
#endif
|
||||
}
|
||||
break;
|
||||
# endif /* OPENSSL_HAS_ECC */
|
||||
#endif /* WITH_OPENSSL */
|
||||
|
|
@ -2665,6 +2727,10 @@ sshkey_verify(const struct sshkey *key,
|
|||
case KEY_ECDSA_CERT:
|
||||
case KEY_ECDSA:
|
||||
return ssh_ecdsa_verify(key, sig, siglen, data, dlen, compat);
|
||||
case KEY_ECDSA_SK_CERT:
|
||||
case KEY_ECDSA_SK:
|
||||
return ssh_ecdsa_sk_verify(key, sig, siglen, data, dlen,
|
||||
compat);
|
||||
# endif /* OPENSSL_HAS_ECC */
|
||||
case KEY_RSA_CERT:
|
||||
case KEY_RSA:
|
||||
|
|
@ -2700,6 +2766,9 @@ sshkey_to_certified(struct sshkey *k)
|
|||
case KEY_ECDSA:
|
||||
newtype = KEY_ECDSA_CERT;
|
||||
break;
|
||||
case KEY_ECDSA_SK:
|
||||
newtype = KEY_ECDSA_SK_CERT;
|
||||
break;
|
||||
#endif /* WITH_OPENSSL */
|
||||
case KEY_ED25519:
|
||||
newtype = KEY_ED25519_CERT;
|
||||
|
|
@ -2797,12 +2866,18 @@ sshkey_certify_custom(struct sshkey *k, struct sshkey *ca, const char *alg,
|
|||
break;
|
||||
# ifdef OPENSSL_HAS_ECC
|
||||
case KEY_ECDSA_CERT:
|
||||
case KEY_ECDSA_SK_CERT:
|
||||
if ((ret = sshbuf_put_cstring(cert,
|
||||
sshkey_curve_nid_to_name(k->ecdsa_nid))) != 0 ||
|
||||
(ret = sshbuf_put_ec(cert,
|
||||
EC_KEY_get0_public_key(k->ecdsa),
|
||||
EC_KEY_get0_group(k->ecdsa))) != 0)
|
||||
goto out;
|
||||
if (k->type == KEY_ECDSA_SK_CERT) {
|
||||
if ((ret = sshbuf_put_cstring(cert,
|
||||
k->sk_application)) != 0)
|
||||
goto out;
|
||||
}
|
||||
break;
|
||||
# endif /* OPENSSL_HAS_ECC */
|
||||
case KEY_RSA_CERT:
|
||||
|
|
@ -3082,6 +3157,28 @@ sshkey_private_serialize_opt(struct sshkey *key, struct sshbuf *buf,
|
|||
EC_KEY_get0_private_key(key->ecdsa))) != 0)
|
||||
goto out;
|
||||
break;
|
||||
case KEY_ECDSA_SK:
|
||||
if ((r = sshbuf_put_cstring(b,
|
||||
sshkey_curve_nid_to_name(key->ecdsa_nid))) != 0 ||
|
||||
(r = sshbuf_put_eckey(b, key->ecdsa)) != 0 ||
|
||||
(r = sshbuf_put_cstring(b, key->sk_application)) != 0 ||
|
||||
(r = sshbuf_put_u8(b, key->sk_flags)) != 0 ||
|
||||
(r = sshbuf_put_stringb(b, key->sk_key_handle)) != 0 ||
|
||||
(r = sshbuf_put_stringb(b, key->sk_reserved)) != 0)
|
||||
goto out;
|
||||
break;
|
||||
case KEY_ECDSA_SK_CERT:
|
||||
if (key->cert == NULL || sshbuf_len(key->cert->certblob) == 0) {
|
||||
r = SSH_ERR_INVALID_ARGUMENT;
|
||||
goto out;
|
||||
}
|
||||
if ((r = sshbuf_put_stringb(b, key->cert->certblob)) != 0 ||
|
||||
(r = sshbuf_put_cstring(b, key->sk_application)) != 0 ||
|
||||
(r = sshbuf_put_u8(b, key->sk_flags)) != 0 ||
|
||||
(r = sshbuf_put_stringb(b, key->sk_key_handle)) != 0 ||
|
||||
(r = sshbuf_put_stringb(b, key->sk_reserved)) != 0)
|
||||
goto out;
|
||||
break;
|
||||
# endif /* OPENSSL_HAS_ECC */
|
||||
#endif /* WITH_OPENSSL */
|
||||
case KEY_ED25519:
|
||||
|
|
@ -3270,6 +3367,60 @@ sshkey_private_deserialize(struct sshbuf *buf, struct sshkey **kp)
|
|||
(r = sshkey_ec_validate_private(k->ecdsa)) != 0)
|
||||
goto out;
|
||||
break;
|
||||
case KEY_ECDSA_SK:
|
||||
if ((k = sshkey_new(type)) == NULL) {
|
||||
r = SSH_ERR_ALLOC_FAIL;
|
||||
goto out;
|
||||
}
|
||||
if ((k->ecdsa_nid = sshkey_ecdsa_nid_from_name(tname)) == -1) {
|
||||
r = SSH_ERR_INVALID_ARGUMENT;
|
||||
goto out;
|
||||
}
|
||||
if ((r = sshbuf_get_cstring(buf, &curve, NULL)) != 0)
|
||||
goto out;
|
||||
if (k->ecdsa_nid != sshkey_curve_name_to_nid(curve)) {
|
||||
r = SSH_ERR_EC_CURVE_MISMATCH;
|
||||
goto out;
|
||||
}
|
||||
if ((k->sk_key_handle = sshbuf_new()) == NULL ||
|
||||
(k->sk_reserved = sshbuf_new()) == NULL) {
|
||||
r = SSH_ERR_ALLOC_FAIL;
|
||||
goto out;
|
||||
}
|
||||
k->ecdsa = EC_KEY_new_by_curve_name(k->ecdsa_nid);
|
||||
if (k->ecdsa == NULL) {
|
||||
r = SSH_ERR_LIBCRYPTO_ERROR;
|
||||
goto out;
|
||||
}
|
||||
if ((r = sshbuf_get_eckey(buf, k->ecdsa)) != 0 ||
|
||||
(r = sshbuf_get_cstring(buf, &k->sk_application,
|
||||
NULL)) != 0 ||
|
||||
(r = sshbuf_get_u8(buf, &k->sk_flags)) != 0 ||
|
||||
(r = sshbuf_get_stringb(buf, k->sk_key_handle)) != 0 ||
|
||||
(r = sshbuf_get_stringb(buf, k->sk_reserved)) != 0)
|
||||
goto out;
|
||||
if ((r = sshkey_ec_validate_public(EC_KEY_get0_group(k->ecdsa),
|
||||
EC_KEY_get0_public_key(k->ecdsa))) != 0)
|
||||
goto out;
|
||||
break;
|
||||
case KEY_ECDSA_SK_CERT:
|
||||
if ((r = sshkey_froms(buf, &k)) != 0)
|
||||
goto out;
|
||||
if ((k->sk_key_handle = sshbuf_new()) == NULL ||
|
||||
(k->sk_reserved = sshbuf_new()) == NULL) {
|
||||
r = SSH_ERR_ALLOC_FAIL;
|
||||
goto out;
|
||||
}
|
||||
if ((r = sshbuf_get_cstring(buf, &k->sk_application,
|
||||
NULL)) != 0 ||
|
||||
(r = sshbuf_get_u8(buf, &k->sk_flags)) != 0 ||
|
||||
(r = sshbuf_get_stringb(buf, k->sk_key_handle)) != 0 ||
|
||||
(r = sshbuf_get_stringb(buf, k->sk_reserved)) != 0)
|
||||
goto out;
|
||||
if ((r = sshkey_ec_validate_public(EC_KEY_get0_group(k->ecdsa),
|
||||
EC_KEY_get0_public_key(k->ecdsa))) != 0)
|
||||
goto out;
|
||||
break;
|
||||
# endif /* OPENSSL_HAS_ECC */
|
||||
case KEY_RSA:
|
||||
if ((k = sshkey_new(type)) == NULL) {
|
||||
|
|
@ -4090,6 +4241,9 @@ sshkey_private_to_fileblob(struct sshkey *key, struct sshbuf *blob,
|
|||
#ifdef WITH_XMSS
|
||||
case KEY_XMSS:
|
||||
#endif /* WITH_XMSS */
|
||||
#ifdef WITH_OPENSSL
|
||||
case KEY_ECDSA_SK:
|
||||
#endif /* WITH_OPENSSL */
|
||||
return sshkey_private_to_blob2(key, blob, passphrase,
|
||||
comment, openssh_format_cipher, openssh_format_rounds);
|
||||
default:
|
||||
|
|
@ -4111,7 +4265,6 @@ sshkey_private_to_fileblob(struct sshkey *key, struct sshbuf *blob,
|
|||
#endif /* WITH_OPENSSL */
|
||||
}
|
||||
|
||||
|
||||
#ifdef WITH_OPENSSL
|
||||
static int
|
||||
translate_libcrypto_error(unsigned long pem_err)
|
||||
|
|
|
|||
19
sshkey.h
19
sshkey.h
|
|
@ -1,4 +1,4 @@
|
|||
/* $OpenBSD: sshkey.h,v 1.34 2019/09/03 08:31:20 djm Exp $ */
|
||||
/* $OpenBSD: sshkey.h,v 1.35 2019/10/31 21:15:14 djm Exp $ */
|
||||
|
||||
/*
|
||||
* Copyright (c) 2000, 2001 Markus Friedl. All rights reserved.
|
||||
|
|
@ -65,6 +65,8 @@ enum sshkey_types {
|
|||
KEY_ED25519_CERT,
|
||||
KEY_XMSS,
|
||||
KEY_XMSS_CERT,
|
||||
KEY_ECDSA_SK,
|
||||
KEY_ECDSA_SK_CERT,
|
||||
KEY_UNSPEC
|
||||
};
|
||||
|
||||
|
|
@ -118,18 +120,30 @@ struct sshkey_cert {
|
|||
struct sshkey {
|
||||
int type;
|
||||
int flags;
|
||||
/* KEY_RSA */
|
||||
RSA *rsa;
|
||||
/* KEY_DSA */
|
||||
DSA *dsa;
|
||||
/* KEY_ECDSA and KEY_ECDSA_SK */
|
||||
int ecdsa_nid; /* NID of curve */
|
||||
EC_KEY *ecdsa;
|
||||
/* KEY_ED25519 */
|
||||
u_char *ed25519_sk;
|
||||
u_char *ed25519_pk;
|
||||
/* KEY_XMSS */
|
||||
char *xmss_name;
|
||||
char *xmss_filename; /* for state file updates */
|
||||
void *xmss_state; /* depends on xmss_name, opaque */
|
||||
u_char *xmss_sk;
|
||||
u_char *xmss_pk;
|
||||
/* KEY_ECDSA_SK */
|
||||
char *sk_application;
|
||||
uint8_t sk_flags;
|
||||
struct sshbuf *sk_key_handle;
|
||||
struct sshbuf *sk_reserved;
|
||||
/* Certificates */
|
||||
struct sshkey_cert *cert;
|
||||
/* Private key shielding */
|
||||
u_char *shielded_private;
|
||||
size_t shielded_len;
|
||||
u_char *shield_prekey;
|
||||
|
|
@ -268,6 +282,9 @@ int ssh_ecdsa_sign(const struct sshkey *key, u_char **sigp, size_t *lenp,
|
|||
int ssh_ecdsa_verify(const struct sshkey *key,
|
||||
const u_char *signature, size_t signaturelen,
|
||||
const u_char *data, size_t datalen, u_int compat);
|
||||
int ssh_ecdsa_sk_verify(const struct sshkey *key,
|
||||
const u_char *signature, size_t signaturelen,
|
||||
const u_char *data, size_t datalen, u_int compat);
|
||||
int ssh_ed25519_sign(const struct sshkey *key, u_char **sigp, size_t *lenp,
|
||||
const u_char *data, size_t datalen, u_int compat);
|
||||
int ssh_ed25519_verify(const struct sshkey *key,
|
||||
|
|
|
|||
Загрузка…
Ссылка в новой задаче