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103 lines
2.9 KiB
C
103 lines
2.9 KiB
C
/* rsa.c
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* Copyright (c) 1997 by Werner Koch (dd9jn)
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*
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* This file is part of G10.
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*
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* G10 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 2 of the License, or
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* (at your option) any later version.
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*
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* G10 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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*
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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, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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#include <config.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <assert.h>
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#include "options.h"
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#include "packet.h"
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#include "errors.h"
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#include "iobuf.h"
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#include "keydb.h"
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#include "memory.h"
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#include "util.h"
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#include "main.h"
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void
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g10_rsa_encrypt( PKT_public_cert *pkc, PKT_pubkey_enc *enc, DEK *dek )
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{
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#ifdef HAVE_RSA_CIPHER
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RSA_public_key pkey;
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assert( enc->pubkey_algo == PUBKEY_ALGO_RSA );
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keyid_from_pkc( pkc, enc->keyid );
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enc->d.rsa.rsa_integer = encode_session_key( dek,
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mpi_get_nbits(pkc->d.rsa.rsa_n) );
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pkey.n = pkc->d.rsa.rsa_n;
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pkey.e = pkc->d.rsa.rsa_e;
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if( DBG_CIPHER )
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log_mpidump("Plain DEK frame: ", enc->d.rsa.rsa_integer);
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rsa_public( enc->d.rsa.rsa_integer, enc->d.rsa.rsa_integer, &pkey);
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if( DBG_CIPHER )
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log_mpidump("Encry DEK frame: ", enc->d.rsa.rsa_integer);
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if( opt.verbose ) {
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char *ustr = get_user_id_string( enc->keyid );
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log_info("RSA encrypted for: %s\n", ustr );
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m_free(ustr);
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}
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#else
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log_bug(NULL);
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#endif/* ! HAVE_RSA_CIPHER*/
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}
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void
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g10_rsa_sign( PKT_secret_cert *skc, PKT_signature *sig,
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MD_HANDLE md, int digest_algo )
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{
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#ifdef HAVE_RSA_CIPHER
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RSA_secret_key skey;
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byte *dp;
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assert( sig->pubkey_algo == PUBKEY_ALGO_RSA );
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if( !digest_algo )
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digest_algo = md_get_algo(md);
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dp = md_read( md, digest_algo );
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keyid_from_skc( skc, sig->keyid );
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sig->d.rsa.digest_algo = digest_algo;
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sig->d.rsa.digest_start[0] = dp[0];
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sig->d.rsa.digest_start[1] = dp[1];
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sig->d.rsa.rsa_integer =
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encode_md_value( md, mpi_get_nbits(skc->d.rsa.rsa_n));
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skey.e = skc->d.rsa.rsa_e;
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skey.n = skc->d.rsa.rsa_n;
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skey.p = skc->d.rsa.rsa_p;
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skey.q = skc->d.rsa.rsa_q;
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skey.d = skc->d.rsa.rsa_d;
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skey.u = skc->d.rsa.rsa_u;
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rsa_secret( sig->d.rsa.rsa_integer, sig->d.rsa.rsa_integer, &skey);
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memset( &skey, 0, sizeof skey );
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if( opt.verbose ) {
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char *ustr = get_user_id_string( sig->keyid );
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log_info("RSA signature from: %s\n", ustr );
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m_free(ustr);
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}
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#else
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log_bug(NULL);
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#endif/* ! HAVE_RSA_CIPHER*/
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}
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