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/***************************************************************************
* fqterm, a terminal emulator for both BBS and *nix. *
* Copyright (C) 2008 fqterm development group. *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program 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 program; if not, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. *
***************************************************************************/
#include <QGlobalStatic>
#include "fqterm_trace.h"
#include "fqterm_ssh_types.h"
#include "fqterm_ssh_rsa.h"
namespace FQTerm {
FQTermSSHRSA::FQTermSSHRSA() {
d_rsa = RSA_new();
d_rsa->n = BN_new();
d_rsa->e = BN_new();
}
FQTermSSHRSA::~FQTermSSHRSA() {
if (d_rsa != NULL) {
RSA_free(d_rsa);
}
}
void FQTermSSHRSA::publicEncrypt(BIGNUM *out, BIGNUM *in) {
u_char *inbuf, *outbuf;
int len, ilen, olen;
if (BN_num_bits(d_rsa->e) < 2 || !BN_is_odd(d_rsa->e)) {
FQ_VERIFY(false); // public_encrypt() exponent too small or not odd.
}
olen = BN_num_bytes(d_rsa->n);
outbuf = new u_char[olen];
ilen = BN_num_bytes(in);
inbuf = new u_char[ilen];
BN_bn2bin(in, inbuf);
if ((len = RSA_public_encrypt(ilen, inbuf, outbuf, d_rsa, RSA_PKCS1_PADDING)) <= 0) {
//RSA_PKCS1_PADDING = 1
FQ_VERIFY(false); // "rsa_public_encrypt() failed.
}
BN_bin2bn(outbuf, len, out);
delete [] outbuf;
delete [] inbuf;
}
} // namespace FQTerm
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