-/* This file is part of secnet, and is distributed under the terms of
- the GNU General Public License version 2 or later.
+/*
+ * rsa.c: implementation of RSA with PKCS#1 padding
+ */
+/*
+ * This file is Free Software. It was originally written for secnet.
+ *
+ * Copyright 1995-2003 Stephen Early
+ * Copyright 2002-2014 Ian Jackson
+ * Copyright 2001 Simon Tatham
+ * Copyright 2013 Mark Wooding
+ *
+ * You may redistribute secnet as a whole and/or modify it under the
+ * terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 3, or (at your option) any
+ * later version.
+ *
+ * You may redistribute this file and/or modify it under the terms of
+ * the GNU General Public License as published by the Free Software
+ * Foundation; either version 2, or (at your option) any later
+ * version.
+ *
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, see
+ * https://www.gnu.org/licenses/gpl.html.
+ */
- Copyright (C) 1995-2002 Stephen Early
- Copyright (C) 2001 Simon Tatham
- Copyright (C) 2002 Ian Jackson
- */
#include <stdio.h>
#include <string.h>
#include <gmp.h>
#include "secnet.h"
#include "util.h"
+#include "unaligned.h"
#define AUTHFILE_ID_STRING "SSH PRIVATE KEY FILE FORMAT 1.1\n"
struct rsapriv {
closure_t cl;
- struct rsaprivkey_if ops;
+ struct sigprivkey_if ops;
struct cloc loc;
MP_INT n;
MP_INT p, dp;
};
struct rsapub {
closure_t cl;
- struct rsapubkey_if ops;
+ struct sigpubkey_if ops;
struct cloc loc;
MP_INT e;
MP_INT n;
mpz_set_str(m, buff, 16);
}
-static string_t rsa_sign(void *sst, uint8_t *data, int32_t datalen)
+static bool_t rsa_sign(void *sst, uint8_t *data, int32_t datalen,
+ struct buffer_if *msg)
{
struct rsapriv *st=sst;
MP_INT a, b, u, v, tmp, tmp2;
- string_t signature;
+ string_t signature = 0;
+ bool_t ok;
mpz_init(&a);
mpz_init(&b);
mpz_init(&u);
mpz_init(&v);
- mpz_powm(&u, &a, &st->dp, &st->p);
- mpz_powm(&v, &a, &st->dq, &st->q);
+ mpz_powm_sec(&u, &a, &st->dp, &st->p);
+ mpz_powm_sec(&v, &a, &st->dq, &st->q);
mpz_sub(&tmp, &u, &v);
mpz_mul(&tmp2, &tmp, &st->w);
mpz_add(&tmp, &tmp2, &v);
signature=write_mpstring(&b);
+ uint8_t *op = buf_append(msg,2);
+ if (!op) { ok=False; goto out; }
+ size_t l = strlen(signature);
+ assert(l < 65536);
+ put_uint16(op, l);
+ op = buf_append(msg,l);
+ if (!op) { ok=False; goto out; }
+ memcpy(op, signature, l);
+
+ ok = True;
+
+ out:
+ free(signature);
mpz_clear(&b);
mpz_clear(&a);
- return signature;
+ return ok;
}
-static rsa_checksig_fn rsa_sig_check;
+static sig_checksig_fn rsa_sig_check;
static bool_t rsa_sig_check(void *sst, uint8_t *data, int32_t datalen,
cstring_t signature)
{
NEW(st);
st->cl.description="rsapub";
- st->cl.type=CL_RSAPUBKEY;
+ st->cl.type=CL_SIGPUBKEY;
st->cl.apply=NULL;
st->cl.interface=&st->ops;
st->ops.st=st;
NEW(st);
st->cl.description="rsapriv";
- st->cl.type=CL_RSAPRIVKEY;
+ st->cl.type=CL_SIGPRIVKEY;
st->cl.apply=NULL;
st->cl.interface=&st->ops;
st->ops.st=st;
i=list_elem(args,0);
if (i) {
if (i->type!=t_string) {
- cfgfatal(i->loc,"rsa-public","first argument must be a string\n");
+ cfgfatal(i->loc,"rsa-private","first argument must be a string\n");
}
filename=i->data.string;
} else {