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add-key works

This commit is contained in:
Werner Koch 1998-05-26 13:38:00 +00:00
parent f9a7043782
commit eed2faab53
69 changed files with 2342 additions and 821 deletions

View file

@ -79,7 +79,47 @@ write_selfsig( KBNODE root, KBNODE pub_root, PKT_secret_cert *skc )
pkc = node->pkt->pkt.public_cert;
/* and make the signature */
rc = make_keysig_packet( &sig, pkc, uid, skc, 0x13, 0 );
rc = make_keysig_packet( &sig, pkc, uid, NULL, skc, 0x13, 0 );
if( rc ) {
log_error("make_keysig_packet failed: %s\n", g10_errstr(rc) );
return rc;
}
pkt = m_alloc_clear( sizeof *pkt );
pkt->pkttype = PKT_SIGNATURE;
pkt->pkt.signature = sig;
add_kbnode( root, new_kbnode( pkt ) );
return rc;
}
static int
write_keybinding( KBNODE root, KBNODE pub_root, PKT_secret_cert *skc )
{
PACKET *pkt;
PKT_signature *sig;
int rc=0;
KBNODE node;
PKT_public_cert *pkc, *subpkc;
if( opt.verbose )
log_info(_("writing key binding signature\n"));
/* get the pkc packet from the pub_tree */
node = find_kbnode( pub_root, PKT_PUBLIC_CERT );
if( !node )
BUG();
pkc = node->pkt->pkt.public_cert;
/* find the last subkey */
subpkc = NULL;
for(node=pub_root; node; node = node->next ) {
if( node->pkt->pkttype == PKT_PUBKEY_SUBCERT )
subpkc = node->pkt->pkt.public_cert;
}
if( !subpkc )
BUG();
/* and make the signature */
rc = make_keysig_packet( &sig, pkc, NULL, subpkc, skc, 0x18, 0 );
if( rc ) {
log_error("make_keysig_packet failed: %s\n", g10_errstr(rc) );
return rc;
@ -95,7 +135,8 @@ write_selfsig( KBNODE root, KBNODE pub_root, PKT_secret_cert *skc )
static int
gen_elg(unsigned nbits, KBNODE pub_root, KBNODE sec_root, DEK *dek,
STRING2KEY *s2k, PKT_secret_cert **ret_skc, u16 valid_days )
STRING2KEY *s2k, PKT_secret_cert **ret_skc, u16 valid_days,
int version )
{
int rc;
int i;
@ -111,6 +152,7 @@ gen_elg(unsigned nbits, KBNODE pub_root, KBNODE sec_root, DEK *dek,
skc = m_alloc_clear( sizeof *skc );
pkc = m_alloc_clear( sizeof *pkc );
skc->timestamp = pkc->timestamp = make_timestamp();
skc->version = pkc->version = version;
skc->valid_days = pkc->valid_days = valid_days;
skc->pubkey_algo = pkc->pubkey_algo = PUBKEY_ALGO_ELGAMAL;
pkc->d.elg.p = pk.p;
@ -124,8 +166,8 @@ gen_elg(unsigned nbits, KBNODE pub_root, KBNODE sec_root, DEK *dek,
skc->protect.algo = 0;
skc->csum = checksum_mpi( skc->d.elg.x );
/* return an unprotected version of the skc */
*ret_skc = copy_secret_cert( NULL, skc );
if( ret_skc ) /* not a subkey: return an unprotected version of the skc */
*ret_skc = copy_secret_cert( NULL, skc );
if( dek ) {
skc->protect.algo = dek->algo;
@ -140,14 +182,14 @@ gen_elg(unsigned nbits, KBNODE pub_root, KBNODE sec_root, DEK *dek,
}
pkt = m_alloc_clear(sizeof *pkt);
pkt->pkttype = PKT_PUBLIC_CERT;
pkt->pkttype = ret_skc ? PKT_PUBLIC_CERT : PKT_PUBKEY_SUBCERT;
pkt->pkt.public_cert = pkc;
add_kbnode(pub_root, new_kbnode( pkt ));
/* don't know whether it makes sense to have the factors, so for now
* we store them in the secret keyring (but they are not secret) */
pkt = m_alloc_clear(sizeof *pkt);
pkt->pkttype = PKT_SECRET_CERT;
pkt->pkttype = ret_skc ? PKT_SECRET_CERT : PKT_SECKEY_SUBCERT;
pkt->pkt.secret_cert = skc;
add_kbnode(sec_root, new_kbnode( pkt ));
for(i=0; factors[i]; i++ )
@ -192,8 +234,8 @@ gen_rsa(unsigned nbits, KBNODE pub_root, KBNODE sec_root, DEK *dek,
skc->d.rsa.csum += checksum_mpi( skc->d.rsa.rsa_q );
skc->d.rsa.csum += checksum_mpi( skc->d.rsa.rsa_u );
/* return an unprotected version of the skc */
*ret_skc = copy_secret_cert( NULL, skc );
if( ret_skc ) /* not a subkey: return an unprotected version of the skc */
*ret_skc = copy_secret_cert( NULL, skc );
if( dek ) {
skc->d.rsa.is_protected = 1;
@ -210,12 +252,12 @@ gen_rsa(unsigned nbits, KBNODE pub_root, KBNODE sec_root, DEK *dek,
}
pkt = m_alloc_clear(sizeof *pkt);
pkt->pkttype = PKT_PUBLIC_CERT;
pkt->pkttype = ret_skc ? PKT_PUBLIC_CERT : PKT_PUBKEY_SUBCERT;
pkt->pkt.public_cert = pkc;
add_kbnode(pub_root, new_kbnode( pkt ));
pkt = m_alloc_clear(sizeof *pkt);
pkt->pkttype = PKT_SECRET_CERT;
pkt->pkttype = ret_skc ? PKT_SECRET_CERT : PKT_SECKEY_SUBCERT;
pkt->pkt.secret_cert = skc;
add_kbnode(sec_root, new_kbnode( pkt ));
@ -267,8 +309,8 @@ gen_dsa(unsigned nbits, KBNODE pub_root, KBNODE sec_root, DEK *dek,
skc->protect.algo = 0;
skc->csum = checksum_mpi( skc->d.dsa.x );
/* return an unprotected version of the skc */
*ret_skc = copy_secret_cert( NULL, skc );
if( ret_skc ) /* not a subkey: return an unprotected version of the skc */
*ret_skc = copy_secret_cert( NULL, skc );
if( dek ) {
skc->protect.algo = dek->algo;
@ -283,7 +325,7 @@ gen_dsa(unsigned nbits, KBNODE pub_root, KBNODE sec_root, DEK *dek,
}
pkt = m_alloc_clear(sizeof *pkt);
pkt->pkttype = PKT_PUBLIC_CERT;
pkt->pkttype = ret_skc ? PKT_PUBLIC_CERT : PKT_PUBKEY_SUBCERT;
pkt->pkt.public_cert = pkc;
add_kbnode(pub_root, new_kbnode( pkt ));
@ -294,7 +336,7 @@ gen_dsa(unsigned nbits, KBNODE pub_root, KBNODE sec_root, DEK *dek,
* are known.
*/
pkt = m_alloc_clear(sizeof *pkt);
pkt->pkttype = PKT_SECRET_CERT;
pkt->pkttype = ret_skc ? PKT_SECRET_CERT : PKT_SECKEY_SUBCERT;
pkt->pkt.secret_cert = skc;
add_kbnode(sec_root, new_kbnode( pkt ));
for(i=1; factors[i]; i++ ) /* the first one is q */
@ -334,74 +376,63 @@ check_valid_days( const char *s )
}
/****************
* Generate a keypair
*/
void
generate_keypair()
static int
ask_algo( int *ret_v4 )
{
char *answer;
unsigned nbits;
char *pub_fname = NULL;
char *sec_fname = NULL;
char *uid = NULL;
KBNODE pub_root = NULL;
KBNODE sec_root = NULL;
PKT_secret_cert *skc = NULL;
DEK *dek = NULL;
STRING2KEY *s2k;
int rc;
int algo;
const char *algo_name;
char *aname, *acomment, *amail;
int valid_days=0;
if( opt.batch || opt.answer_yes || opt.answer_no ) {
log_error(_("Key generation can only be used in interactive mode\n"));
return;
}
tty_printf(_("Please select the algorithm to use:\n"
" (1) ElGamal is the suggested one.\n"
" (2) DSA can only be used for signatures.\n"));
" (2) ElGamal using v4 packets (OpenPGP)\n"
" (3) DSA can only be used for signatures.\n"));
#ifdef ENABLE_RSA_KEYGEN
tty_printf(_(" (3) RSA cannot be used in the U.S.\n"));
tty_printf(_(" (4) RSA cannot be used in the U.S.\n"));
#endif
*ret_v4 = 0;
for(;;) {
#ifdef ENABLE_RSA_KEYGEN
answer = tty_get(_("Your selection? (1,2,3) "));
answer = tty_get(_("Your selection? (1,2,3,4) "));
#else
answer = tty_get(_("Your selection? (1,2) "));
answer = tty_get(_("Your selection? (1,2,3) "));
#endif
tty_kill_prompt();
algo = *answer? atoi(answer): 1;
m_free(answer);
if( algo == 1 ) {
if( algo == 1 || algo == 2 ) {
if( algo == 2 )
*ret_v4 = 1;
algo = PUBKEY_ALGO_ELGAMAL;
algo_name = "ElGamal";
break;
}
else if( algo == 2 ) {
else if( algo == 3 ) {
*ret_v4 = 1;
algo = PUBKEY_ALGO_DSA;
algo_name = "DSA";
break;
}
#ifdef ENABLE_RSA_KEYGEN
else if( algo == 3 ) {
else if( algo == 4 ) {
algo = PUBKEY_ALGO_RSA;
algo_name = "RSA";
break;
}
#endif
}
return algo;
}
static unsigned
ask_keysize( int algo )
{
char *answer;
unsigned nbits;
tty_printf(_("About to generate a new %s keypair.\n"
" minimum keysize is 768 bits\n"
" default keysize is 1024 bits\n"
" highest suggested keysize is 2048 bits\n"), algo_name );
" highest suggested keysize is 2048 bits\n"),
pubkey_algo_to_string(algo) );
for(;;) {
answer = tty_get(_("What keysize do you want? (1024) "));
tty_kill_prompt();
@ -446,6 +477,15 @@ generate_keypair()
nbits = ((nbits + 31) / 32) * 32;
tty_printf(_("rounded up to %u bits\n"), nbits );
}
return nbits;
}
static int
ask_valid_days()
{
char *answer;
int valid_days=0;
tty_printf(_("Please specify how long the key should be valid.\n"
" 0 = key does not expire\n"
@ -491,15 +531,21 @@ generate_keypair()
break;
}
m_free(answer);
return valid_days;
}
static char *
ask_user_id()
{
char *answer;
char *aname, *acomment, *amail, *uid;
tty_printf( _("\n"
"You need a User-ID to identify your key; the software constructs the user id\n"
"from Real Name, Comment and Email Address in this form:\n"
" \"Heinrich Heine (Der Dichter) <heinrichh@duesseldorf.de>\"\n\n") );
uid = NULL;
aname=acomment=amail=NULL;
uid = aname = acomment = amail = NULL;
for(;;) {
char *p;
@ -600,8 +646,16 @@ generate_keypair()
break;
m_free(uid); uid = NULL;
}
return uid;
}
static DEK *
ask_passphrase( STRING2KEY **ret_s2k )
{
DEK *dek = NULL;
STRING2KEY *s2k;
tty_printf(_("You need a Passphrase to protect your secret key.\n\n") );
s2k = m_alloc_secure( sizeof *s2k );
@ -624,6 +678,77 @@ generate_keypair()
else
break; /* okay */
}
*ret_s2k = s2k;
return dek;
}
static int
do_create( int algo, unsigned nbits, KBNODE pub_root, KBNODE sec_root,
DEK *dek, STRING2KEY *s2k, PKT_secret_cert **skc, int valid_days,
int v4_packet )
{
int rc=0;
tty_printf(_(
"We need to generate a lot of random bytes. It is a good idea to perform\n"
"some other action (work in another window, move the mouse, utilize the\n"
"network and the disks) during the prime generation; this gives the random\n"
"number generator a better chance to gain enough entropy.\n") );
if( algo == PUBKEY_ALGO_ELGAMAL )
rc = gen_elg(nbits, pub_root, sec_root, dek, s2k,
skc, valid_days, v4_packet? 4:3 );
#ifdef ENABLE_RSA_KEYGEN
else if( algo == PUBKEY_ALGO_RSA )
rc = gen_rsa(nbits, pub_root, sec_root, dek, s2k, skc, valid_days );
#endif
else if( algo == PUBKEY_ALGO_DSA )
rc = gen_dsa(nbits, pub_root, sec_root, dek, s2k, skc, valid_days);
else
BUG();
if( !rc ) {
add_kbnode( pub_root,
make_comment_node("#created by GNUPG v" VERSION " ("
PRINTABLE_OS_NAME ")"));
add_kbnode( sec_root,
make_comment_node("#created by GNUPG v" VERSION " ("
PRINTABLE_OS_NAME ")"));
}
return rc;
}
/****************
* Generate a keypair
*/
void
generate_keypair()
{
unsigned nbits;
char *pub_fname = NULL;
char *sec_fname = NULL;
char *uid = NULL;
KBNODE pub_root = NULL;
KBNODE sec_root = NULL;
PKT_secret_cert *skc = NULL;
DEK *dek;
STRING2KEY *s2k;
int rc;
int algo;
int ndays;
int v4;
if( opt.batch || opt.answer_yes || opt.answer_no ) {
log_error(_("Key generation can only be used in interactive mode\n"));
return;
}
algo = ask_algo( &v4 );
nbits = ask_keysize( algo );
ndays = ask_valid_days();
uid = ask_user_id();
dek = ask_passphrase( &s2k );
/* now check whether we are allowed to write to the keyrings */
@ -642,30 +767,7 @@ generate_keypair()
pub_root = make_comment_node("#"); delete_kbnode(pub_root);
sec_root = make_comment_node("#"); delete_kbnode(sec_root);
tty_printf(_(
"We need to generate a lot of random bytes. It is a good idea to perform\n"
"some other action (work in another window, move the mouse, utilize the\n"
"network and the disks) during the prime generation; this gives the random\n"
"number generator a better chance to gain enough entropy.\n") );
if( algo == PUBKEY_ALGO_ELGAMAL )
rc = gen_elg(nbits, pub_root, sec_root, dek, s2k, &skc, valid_days );
#ifdef ENABLE_RSA_KEYGEN
else if( algo == PUBKEY_ALGO_RSA )
rc = gen_rsa(nbits, pub_root, sec_root, dek, s2k, &skc, valid_days );
#endif
else if( algo == PUBKEY_ALGO_DSA )
rc = gen_dsa(nbits, pub_root, sec_root, dek, s2k, &skc, valid_days);
else
BUG();
if( !rc ) {
add_kbnode( pub_root,
make_comment_node("#created by GNUPG v" VERSION " ("
PRINTABLE_OS_NAME ")"));
add_kbnode( sec_root,
make_comment_node("#created by GNUPG v" VERSION " ("
PRINTABLE_OS_NAME ")"));
}
rc = do_create( algo, nbits, pub_root, sec_root, dek, s2k, &skc, ndays, v4);
if( !rc )
write_uid(pub_root, uid );
if( !rc )
@ -718,6 +820,11 @@ generate_keypair()
log_error("can't write secret key: %s\n", g10_errstr(rc) );
else {
tty_printf(_("public and secret key created and signed.\n") );
if( algo == PUBKEY_ALGO_DSA )
tty_printf(_("Note that this key cannot be used for "
"encryption. You may want to use\n"
"the command \"--add-key\" to generate a "
"secondary key for this purpose.\n") );
}
if( !rc1 )
@ -745,8 +852,148 @@ generate_keypair()
* add a new subkey to an existing key.
*/
void
generate_subkeypair( const char *userid )
generate_subkeypair( const char *username )
{
log_fatal("To be implemented :-)\n");
int rc=0;
KBPOS pub_kbpos, sec_kbpos;
KBNODE pub_keyblock = NULL;
KBNODE sec_keyblock = NULL;
KBNODE node;
PKT_secret_cert *skc = NULL; /* this is the primary skc */
u32 keyid[2];
int v4, algo, ndays;
unsigned nbits;
char *passphrase = NULL;
DEK *dek = NULL;
STRING2KEY *s2k = NULL;
if( opt.batch || opt.answer_yes || opt.answer_no ) {
log_error(_("Key generation can only be used in interactive mode\n"));
return;
}
/* search the userid */
rc = find_secret_keyblock_byname( &sec_kbpos, username );
if( rc ) {
log_error("user '%s' not found\n", username );
goto leave;
}
rc = read_keyblock( &sec_kbpos, &sec_keyblock );
if( rc ) {
log_error("error reading the secret key: %s\n", g10_errstr(rc) );
goto leave;
}
/* and the public key */
rc = find_keyblock_byname( &pub_kbpos, username );
if( rc ) {
log_error("user '%s' not found in public ring\n", username );
goto leave;
}
rc = read_keyblock( &pub_kbpos, &pub_keyblock );
if( rc ) {
log_error("error reading the public key: %s\n", g10_errstr(rc) );
goto leave;
}
/* break out the primary key */
node = find_kbnode( sec_keyblock, PKT_SECRET_CERT );
if( !node ) {
log_error("Oops; secret key not found anymore!\n");
rc = G10ERR_GENERAL;
goto leave;
}
/* make a copy of the skc to keep the protected one in the keyblock */
skc = copy_secret_cert( NULL, node->pkt->pkt.secret_cert );
keyid_from_skc( skc, keyid );
/* display primary and all secondary keys */
tty_printf("sec %4u%c/%08lX %s ",
nbits_from_skc( skc ),
pubkey_letter( skc->pubkey_algo ),
keyid[1], datestr_from_skc(skc) );
{
size_t n;
char *p = get_user_id( keyid, &n );
tty_print_string( p, n );
m_free(p);
tty_printf("\n");
}
for(node=sec_keyblock; node; node = node->next ) {
if( node->pkt->pkttype == PKT_SECKEY_SUBCERT ) {
PKT_secret_cert *subskc = node->pkt->pkt.secret_cert;
keyid_from_skc( subskc, keyid );
tty_printf("sub %4u%c/%08lX %s\n",
nbits_from_skc( subskc ),
pubkey_letter( subskc->pubkey_algo ),
keyid[1], datestr_from_skc(subskc) );
}
}
tty_printf("\n");
/* unprotect to get the passphrase */
switch( is_secret_key_protected( skc ) ) {
case -1:
rc = G10ERR_PUBKEY_ALGO;
break;
case 0:
tty_printf("This key is not protected.\n");
break;
default:
tty_printf("Key is protected.\n");
rc = check_secret_key( skc );
if( !rc )
passphrase = get_last_passphrase();
break;
}
if( rc )
goto leave;
algo = ask_algo( &v4 );
nbits = ask_keysize( algo );
ndays = ask_valid_days();
if( passphrase ) {
s2k = m_alloc_secure( sizeof *s2k );
s2k->mode = 1;
s2k->hash_algo = DIGEST_ALGO_RMD160;
set_next_passphrase( passphrase );
dek = passphrase_to_dek( NULL, CIPHER_ALGO_BLOWFISH, s2k, 2 );
}
rc = do_create( algo, nbits, pub_keyblock, sec_keyblock,
dek, s2k, NULL, ndays, v4 );
if( !rc )
rc = write_keybinding(pub_keyblock, pub_keyblock, skc);
if( !rc )
rc = write_keybinding(sec_keyblock, pub_keyblock, skc);
/* write back */
if( !rc ) {
rc = update_keyblock( &pub_kbpos, pub_keyblock );
if( rc )
log_error("update_public_keyblock failed\n" );
}
if( !rc ) {
rc = update_keyblock( &sec_kbpos, sec_keyblock );
if( rc )
log_error("update_secret_keyblock failed\n" );
}
if( !rc )
tty_printf(_("public and secret subkey created.\n") );
leave:
if( rc )
tty_printf(_("Key generation failed: %s\n"), g10_errstr(rc) );
m_free( passphrase );
m_free( dek );
m_free( s2k );
if( skc ) /* release the copy of the (now unprotected) secret key */
free_secret_cert(skc);
release_kbnode( sec_keyblock );
release_kbnode( pub_keyblock );
set_next_passphrase( NULL );
}