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/*
This file is part of tgl-library
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
Copyright Ben Wiederhake 2015
*/
#include "../config.h"
#ifdef TGL_AVOID_OPENSSL
#include <gcrypt.h>
#include "meta.h"
#include "rsa_pem.h"
#include "../tools.h" /* talloc */
struct TGLC_rsa {
TGLC_bn *n;
TGLC_bn *e;
};
TGLC_rsa *TGLC_rsa_new (unsigned long e, int n_bytes, const unsigned char *n) {
assert (n_bytes > 0 && n_bytes < 5000);
TGLC_rsa *ret = talloc (sizeof (TGLC_rsa));
ret->e = TGLC_bn_new ();
TGLC_bn_set_word (ret->e, e);
ret->n = TGLC_bn_bin2bn (n, n_bytes, NULL);
assert (n_bytes == TGLC_bn_num_bytes (ret->n));
return ret;
}
#define RSA_GETTER(M) \
TGLC_bn *TGLC_rsa_ ## M (TGLC_rsa *key) { \
return key->M; \
} \
RSA_GETTER(n);
RSA_GETTER(e);
void TGLC_rsa_free (TGLC_rsa *key) {
if (key->e) {
TGLC_bn_free (key->e);
}
if (key->n) {
TGLC_bn_free (key->n);
}
tfree (key, sizeof (TGLC_rsa));
}
TGLC_rsa *TGLC_pem_read_RSAPublicKey (FILE *fp) {
/*
* Reading PEM format involves ASN.1 and is hard. libgcrypt doesn't support it.
* The dependency on oh-so-freaking-much code just to parse static data that
* will never change is not justified. Let the caller figure out how to resolve
* this (telegram-purple does so by using libpurple's built-in functions), and
* ignore any PEM files.
*/
(void) fp;
return NULL;
}
#endif
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