initially checkin

1 files changed, 253 insertions, 0 deletions

diff --git a/g10/keygen.c b/g10/keygen.c
new file mode 100644
index 000000000..0d5db8d85
--- /dev/null
+++ b/g10/keygen.c
@@ -0,0 +1,253 @@
+/* keygen.c - generate a key pair
+ *	Copyright (c) 1997 by Werner Koch (dd9jn)
+ *
+ * This file is part of G10.
+ *
+ * G10 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.
+ *
+ * G10 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ */
+
+#include <config.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <assert.h>
+#include "util.h"
+#include "main.h"
+#include "packet.h"
+#include "cipher.h"
+#include "ttyio.h"
+#include "options.h"
+
+static int
+answer_is_yes( const char *s )
+{
+    if( !stricmp(s, "yes") )
+	return 1;
+    if( *s == 'y' && !s[1] )
+	return 1;
+    if( *s == 'Y' && !s[1] )
+	return 1;
+    return 0;
+}
+
+
+static void
+write_comment( IOBUF out, const char *s )
+{
+    PACKET pkt;
+    size_t n = strlen(s);
+    int rc;
+
+    pkt.pkttype = PKT_COMMENT;
+    pkt.pkt.comment = m_alloc( sizeof *pkt.pkt.comment + n - 1 );
+    pkt.pkt.comment->len = n;
+    strcpy(pkt.pkt.comment->data, s);
+    if( (rc = build_packet( out, &pkt )) )
+	log_error("build_packet(comment) failed: %s\n", g10_errstr(rc) );
+    free_packet( &pkt );
+}
+
+static void
+write_uid( IOBUF out, const char *s )
+{
+    PACKET pkt;
+    size_t n = strlen(s);
+    int rc;
+
+    pkt.pkttype = PKT_USER_ID;
+    pkt.pkt.user_id = m_alloc( sizeof *pkt.pkt.user_id + n - 1 );
+    pkt.pkt.user_id->len = n;
+    strcpy(pkt.pkt.user_id->name, s);
+    if( (rc = build_packet( out, &pkt )) )
+	log_error("build_packet(user_id) failed: %s\n", g10_errstr(rc) );
+    free_packet( &pkt );
+}
+
+
+static int
+gen_rsa(unsigned nbits, IOBUF pub_io, IOBUF sec_io)
+{
+    int rc;
+    PACKET pkt1, pkt2;
+    PKT_seckey_cert *skc;
+    PKT_pubkey_cert *pkc;
+    RSA_public_key pk;
+    RSA_secret_key sk;
+
+    rsa_generate( &pk, &sk, nbits );
+
+    skc = m_alloc( sizeof *skc );
+    pkc = m_alloc( sizeof *pkc );
+    skc->timestamp = pkc->timestamp = make_timestamp();
+    skc->valid_days = pkc->valid_days = 0; /* fixme: make it configurable*/
+    skc->pubkey_algo = pkc->pubkey_algo = PUBKEY_ALGO_RSA;
+		       memset(&pkc->mfx, 0, sizeof pkc->mfx);
+		       pkc->d.rsa.rsa_n = pk.n;
+		       pkc->d.rsa.rsa_e = pk.e;
+    skc->d.rsa.rsa_n = sk.n;
+    skc->d.rsa.rsa_e = sk.e;
+    skc->d.rsa.rsa_d = sk.d;
+    skc->d.rsa.rsa_p = sk.p;
+    skc->d.rsa.rsa_q = sk.q;
+    skc->d.rsa.rsa_u = sk.u;
+    skc->d.rsa.calc_csum = 0;
+    skc->d.rsa.is_protected = 0; /* FIXME!!! */
+    skc->d.rsa.protect_algo = 0; /* should be blowfish */
+    /*memcpy(skc->d.rsa.protect.blowfish.iv,"12345678", 8);*/
+
+    init_packet(&pkt1);
+    pkt1.pkttype = PKT_PUBKEY_CERT;
+    pkt1.pkt.pubkey_cert = pkc;
+    init_packet(&pkt2);
+    pkt2.pkttype = PKT_SECKEY_CERT;
+    pkt2.pkt.seckey_cert = skc;
+
+    if( (rc = build_packet( pub_io, &pkt1 )) ) {
+	log_error("build pubkey_cert packet failed: %s\n", g10_errstr(rc) );
+	goto leave;
+    }
+    if( (rc = build_packet( sec_io, &pkt2 )) ) {
+	log_error("build seckey_cert packet failed: %s\n", g10_errstr(rc) );
+	goto leave;
+    }
+
+  leave:
+    free_packet(&pkt1);
+    free_packet(&pkt2);
+    return rc;
+}
+
+
+/****************
+ * Generate a keypair
+ */
+void
+generate_keypair()
+{
+    char *answer;
+    unsigned nbits;
+    char *pub_fname = "./pubring.g10";
+    char *sec_fname = "./secring.g10";
+    char *uid = NULL;
+    IOBUF pub_io = NULL;
+    IOBUF sec_io = NULL;
+    int rc;
+
+    if( opt.batch || opt.answer_yes || opt.answer_no )
+	log_fatal("Key generation can only be used in interactive mode\n");
+
+    tty_printf("About to generate a new keypair:\n"
+	       "              minimum keysize is  768 bits\n"
+	       "              default keysize is 1024 bits\n"
+	       "    highest suggested keysize is 2048 bits\n" );
+    for(;;) {
+	answer = tty_get("What keysize do you want? (256) ");
+	tty_kill_prompt();
+	nbits = *answer? atoi(answer): 256;
+	m_free(answer);
+	if( nbits < 128 ) /* FIXME: change this to 768 */
+	    tty_printf("keysize too small; please select a larger one\n");
+	else if( nbits > 2048 ) {
+	    tty_printf("Keysizes larger than 2048 are not suggested, because "
+		       "computations take REALLY long!\n");
+	    answer = tty_get("Are you sure, that you want this keysize? ");
+	    tty_kill_prompt();
+	    if( answer_is_yes(answer) ) {
+		m_free(answer);
+		tty_printf("Okay, but keep in mind that your monitor "
+			   "and keyboard radiation is also very vulnerable "
+			   "to attacks!\n");
+		break;
+	    }
+	    m_free(answer);
+	}
+	else
+	    break;
+    }
+    tty_printf("Requested keysize is %u bits\n", nbits );
+    if( (nbits % 32) ) {
+	nbits = ((nbits + 31) / 32) * 32;
+	tty_printf("rounded up to %u bits\n", nbits );
+    }
+    tty_printf( "\nYou need a User-ID to identify your key; please use your name and your\n"
+		"email address in this suggested format:\n"
+		"    \"Heinrich Heine <heinrichh@uni-duesseldorf.de>\n" );
+    uid = NULL;
+    for(;;) {
+	m_free(uid);
+	tty_printf("\n");
+	uid = tty_get("Your User-ID: ");
+	tty_kill_prompt();
+	if( strlen(uid) < 5 )
+	    tty_printf("Please enter a string of at least 5 characters\n");
+	else  {
+	    tty_printf("You selected this USER-ID:\n    \"%s\"\n\n", uid);
+	    answer = tty_get("Is this correct? ");
+	    tty_kill_prompt();
+	    if( answer_is_yes(answer) ) {
+		m_free(answer);
+		break;
+	    }
+	    m_free(answer);
+	}
+    }
+
+    /* now check wether we a are allowed to write the keyrings */
+    if( !(rc=overwrite_filep( pub_fname )) ) {
+	if( !(pub_io = iobuf_create( pub_fname )) )
+	    log_error("can't create %s: %s\n", pub_fname, strerror(errno) );
+	else if( opt.verbose )
+	    log_info("writing to '%s'\n", pub_fname );
+    }
+    else if( rc != -1 ) {
+	log_error("Oops: overwrite_filep(%s): %s\n", pub_fname, g10_errstr(rc) );
+	m_free(uid);
+	return;
+    }
+    else {
+	m_free(uid);
+	return;
+    }
+    if( !(rc=overwrite_filep( sec_fname )) ) {
+	if( !(sec_io = iobuf_create( sec_fname )) )
+	    log_error("can't create %s: %s\n", sec_fname, strerror(errno) );
+	else if( opt.verbose )
+	    log_info("writing to '%s'\n", sec_fname );
+    }
+    else if( rc != -1 ) {
+	log_error("Oops: overwrite_filep(%s): %s\n", sec_fname, g10_errstr(rc) );
+	m_free(uid);
+	return;
+    }
+    else {
+	iobuf_cancel(pub_io);
+	m_free(uid);
+	return;
+    }
+
+
+    write_comment( pub_io, "#public key created by G10 pre-release " VERSION );
+    write_comment( sec_io, "#secret key created by G10 pre-release " VERSION );
+
+    gen_rsa(nbits, pub_io, sec_io);
+    write_uid(pub_io, uid );
+    write_uid(sec_io, uid );
+    m_free(uid);
+
+    iobuf_close(pub_io);
+    iobuf_close(sec_io);
+}
+