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155 lines
3.5 KiB
C++
155 lines
3.5 KiB
C++
/*
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This file is part of Pretty Curved Privacy (pcp1).
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Copyright (C) 2013 T.Linden.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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You can contact me by mail: <tlinden AT cpan DOT org>.
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*/
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#include "sign++.h"
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using namespace std;
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using namespace pcp;
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Signature::Signature(Key &skey) {
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S = skey;
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havevault = false;
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sig = NULL;
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}
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Signature::Signature(PubKey &pkey) {
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P = pkey;
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havevault = false;
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sig = NULL;
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}
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Signature::Signature(Key &skey, PubKey &pkey) {
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P = pkey;
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S = skey;
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havevault = false;
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sig = NULL;
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}
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Signature::Signature(Vault &v) {
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vault = v;
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havevault = true;
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sig = NULL;
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S = vault.get_primary();
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}
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Signature::~Signature() {
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if(sig != NULL)
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free(sig);
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}
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unsigned char *Signature::sign(std::vector<unsigned char> message) {
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if(! S)
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throw exception("Error: cannot sign without a secret key, use another constructor.");
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if(S.is_encrypted())
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throw exception("Error: cannot sign with an encrypted secret key, decrypt it before using.");
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char n[] = "signvec";
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Buffer *m = buffer_new(32, n);
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for(size_t i=0; i<message.size(); ++i)
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buffer_add(m, (void *)message[i], 1);
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Pcpstream *p = ps_new_inbuffer(m);
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unsigned char *sig = Signature::sign(p);
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ps_close(p);
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buffer_free(m);
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if(sig == NULL)
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throw exception();
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return sig;
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}
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unsigned char *Signature::sign(unsigned char *message, size_t mlen) {
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if(! S)
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throw exception("Error: cannot sign without a secret key, use another constructor.");
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if(S.is_encrypted())
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throw exception("Error: cannot sign with an encrypted secret key, decrypt it before using.");
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char n[] = "signchar";
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Buffer *m = buffer_new(32, n);
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buffer_add(m, message, mlen);
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Pcpstream *p = ps_new_inbuffer(m);
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unsigned char *sig = Signature::sign(p);
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ps_close(p);
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buffer_free(m);
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if(sig == NULL)
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throw exception();
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return sig;
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}
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unsigned char *Signature::sign(Pcpstream *message) {
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Pcpstream *out = ps_new_outbuffer();
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unsigned char *sig = NULL;
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size_t sigsize = pcp_ed_sign_buffered(message, out, S.K, 1);
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if(sigsize > 0) {
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Buffer *o = ps_buffer(out);
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sigsize = buffer_size(o);
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buffer_dump(o);
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sig = (unsigned char*)ucmalloc(sigsize);
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buffer_get_chunk(o, sig, sigsize);
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}
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ps_close(out);
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return sig;
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}
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bool Signature::verify(vector<unsigned char> message) {
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unsigned char *m = (unsigned char *)ucmalloc(message.size());
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for(size_t i=0; i<message.size(); ++i)
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m[i] = message[i];
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bool _b = Signature::verify(m, message.size());
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free(m);
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return _b;
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}
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bool Signature::verify(unsigned char *signature, size_t mlen) {
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if(!P) {
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throw exception("No public key specified, unable to verify.");
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}
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char n[] = "verify";
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Buffer *m = buffer_new(32, n);
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buffer_add(m, signature, mlen);
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Pcpstream *p = ps_new_inbuffer(m);
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pcp_pubkey_t *pub = pcp_ed_verify_buffered(p, P.K);
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ps_close(p);
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if(pub != NULL) {
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Signedby = PubKey(pub);
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return true;
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}
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else {
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throw exception();
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}
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}
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